ATMI FML Function Reference

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Section 3fml - FML Functions

Table 1 Oracle Tuxedo ATMI FML Functions 
Name
Description
Provides an introduction to the FML functions
Converts and adds field
Converts and changes field
Finds, converts, and returns pointer
Finds occurrence of converted value
Gets field and converts
Gets field, allocates space, and converts
Prints error message for last error
Converts 16-bit FML to/from 32-bit FML buffer
Adds new field occurrence
Converts value from type FLD_STRING and adds to buffer
Allocates and initializes fielded buffer
Appends new field occurrence
Compiles expression, returns evaluation tree
Evaluates buffer against tree
Prints Boolean expression as parsed
Changes field occurrence value
Changes field occurrence - caller presents string
Computes checksum for fielded buffer
Compares two fielded buffers
Concatenates source to destination buffer
Copies source to destination buffer
Deletes field occurrence from buffer
Deletes all field occurrences from buffer
Deletes list of fields from buffer
Builds fielded buffer from printed format
Finds field occurrence in buffer
Finds last occurrence of field in buffer
Finds occurrence of field value
Returns ptr to string representation
Returns value of expression as a double
Prints fielded buffer to specified stream
Frees space allocated for fielded buffer
Gets copy and length of field occurrence
Allocates space and gets copy of field occurrence
Gets copy of last occurrence
Gets value converted to string
Uses malloc() to allocate space and gets converted value
Recovers space from id->nm mapping tables
Returns amount of space used
Returns true if buffer is fielded
Indexes a fielded buffer
Initializes fielded buffer
Joins source into destination buffer
Maps field name to field identifier
Maps field identifier to field number
Maps field identifier to field type
Returns len of field occurrence in buffer
Prepares encoding name and multibyte data information
Extracts encoding name and multibyte data information
Makes a field identifier
Moves fielded buffer to destination
Maps field identifier to field name
Computes size needed for buffer
Gets next field occurrence
Recovers space from nm->id mapping tables
Returns count of all occurrences in buffer
Returns count of field occurrences in buffer
Outer join of source into destination buffer
True if field occurrence is present in buffer
Prints buffer to standard output
Provides projection on buffer
Provides projection and copy on buffer
Reads fielded buffer
Reallocates fielded buffer
Restores index in a buffer
Returns size of fielded buffer
Gets error message string for FML error
Converts from one field type to another
Returns pointer to type of field
Discards fielded buffer's index
Returns number of unused bytes in fielded buffer
Updates destination buffer with source
Returns number of used bytes in fielded buffer
Returns long value of field occurrence
Returns string value of field occurrence
Copies from fielded buffer to C structure
Computes size needed for view buffer
Checks if a structure element is NULL
Changes flag options of a mapping entry
Copies from C structure to fielded buffer
Initializes structure element to NULL
Initializes C structure to NULL
Copies from C structure to fielded buffer
Converts C structure to/from target record type
Writes fielded buffer
Converts multibyte characters in an FLD_MBSTRING field in an FML32 typed buffer to a named target encoding.
Converts multibyte characters in an MBSTRING field in an VIEW32 typed buffer to a named target encoding.

 


Introduction to FML Functions

Synopsis

“#include <fml.h>”
“#include <fml32.h>”

Description

FML is a set of C language functions for defining and manipulating storage structures called fielded buffers, that contain attribute-value pairs called fields. The attribute is the field’s identifier, and the associated value represents the field’s data content.

Fielded buffers provide an excellent structure for communicating parameterized data between cooperating processes, by providing named access to a set of related fields. Programs that need to communicate with other processes can use the FML software to provide access to fields without concerning themselves with the structures containing them.

FML also provides a facility called VIEWS that allows you to map fielded buffers to C structures (and the reverse as well). VIEWS lets you perform lengthy manipulations of data in structures rather than in fielded buffers; applications will run faster if data is transferred to structures for manipulation. VIEWS allows the data independence of fielded buffers to be combined with the efficiency and simplicity of classic record structures.

FML16 and FML32

There are two “sizes” of FML. The original FML interface is based on 16-bit values for the length of fields and containing information identifying fields. In this introduction, it will be referred to as FML16. FML16 is limited to 8191 unique fields, individual field lengths of up to 64K bytes, and a total fielded buffer size of 64K. The definitions, types, and function prototypes for this interface are in fml.h which must be included in an application program using the FML16 interface; and functions live in -lfml. A second interface, FML32, uses 32-bit values for the field lengths and identifiers. It allows for about 30 million fields, and field and buffer lengths of about 2 billion bytes. The definitions, types, and function prototypes for FML32 are in fml32.h; and functions live in -lfml32. All definitions, types, and function names for FML32 have a “32” suffix (for example, MAXFBLEN32, FLDID32, Fchg32). Also the environment variables are suffixed with “32” (for example, FLDTBLDIR32, FIELDTBLS32, VIEWFILES32, and VIEWDIR32).

FML Buffers

A fielded buffer is composed of field identifier and field value pairs for fixed length fields (for example, long, short), and field identifier, field length, and field value triples for varying length fields.

A field identifier is a tag for an individual data item in a fielded buffer. The field identifier consists of the name of field number and the type of the data in the field. The field number must be in the range 1 to 8191 inclusive for FML16, and the type definition for a field identifier is FLDID. The field number must be in the range 1 to 33,554,431 inclusive for FML32, and the type definition for a field identifier is FLDID32. The Oracle Tuxedo ATMI system conforms to the following conventions for field numbers:

FML16 Field Numbers
FML32 Field Numbers
Reserved
Available
Reserved
Available
1-100
101-8191
1-10,000,
30,000,001-33,554,431
10,001-30,000,000

Applications should avoid using the reserved field numbers, although the Oracle Tuxedo ATMI system does not strictly enforce applications from using them.

Note: If a field in an FML or FML32 buffer is used for routing, the value of that field must be a number less than or equal to 8191.

The field types can be any of the standard C language types: short, long, float, double, and char. The following types are also supported: string (a series of characters ending with a NULL character), carray (a character array), mbstring (a multibyte character array—available in Oracle Tuxedo release 8.1 or later), ptr (a pointer to a buffer), fml32 (an embedded FML32 buffer), and view32 (an embedded VIEW32 buffer). (The ptr, fml32, and view32 types are supported only for the FML32 interface.) In fml.h, the supported field types are defined as FLD_SHORT, FLD_LONG, FLD_FLOAT, FLD_DOUBLE, FLD_CHAR, FLD_STRING, and FLD_CARRAY. In fml32.h, the supported field types are defined as FLD_SHORT, FLD_LONG, FLD_FLOAT, FLD_DOUBLE, FLD_CHAR, FLD_STRING, FLD_CARRAY, FLD_MBSTRING, FLD_PTR, FLD_FML32, and FLD_VIEW32.

For FML16, a fielded buffer pointer is of type FBFR *, a field length has the type FLDLEN, and the number of occurrences of a field has the type FLDOCC. For FML32, a fielded buffer pointer is of type FBFR32 *, a field length has the type FLDLEN32, and the number of occurrences of a field has the type FLDOCC32.

Fields are referred to by their field identifier in the FML interface. However, it is normally easier for an application programmer to remember a field name. There are two approaches to mapping field names to field identifiers.

Field name/identifier mappings can be made available to FML programs at run time through field table files, described in field_tables(5). The FML16 interface uses the environment variable FLDTBLDIR to specify a list of directories where field tables can be found, and FIELDTBLS to specify a list of the files in the table directories that are to be used. The FML32 interface uses FLDTBLDIR32 and FIELDTBLS32. Within applications programs, the FML functions Fldid() and Fldid32() provide for a run-time translation of a field name to its field identifier and Fname() and Fname32() translate a field identifier to its field name.

Compile-time field name/identifier mappings are provided by the use field header files containing macro definitions for the field names. mkfldhdr() and mkfldhdr32() are provided to make header files out of field table files (see mkfldhdr, mkfldhdr32(1) for details). These header files are #include’d in C programs, and provide another way to map field names to field identifiers at compile-time.

Any field in a fielded buffer can occur more than once. Many FML functions take an argument that specifies which occurrence of a field is to be retrieved or modified. If a field occurs more than once, the first occurrence is numbered 0, and additional occurrences are numbered sequentially. The set of all occurrences make up a logical sequence, but no overhead is associated with the occurrence number (that is, it is not stored in the fielded buffer). If another occurrence of a field is added, it is added at the end of the set and is referred to as the next higher occurrence. When an occurrence other than the highest is deleted, all higher occurrences of the field are shifted down by one (for example, occurrence 6 becomes occurrence 5, 5 becomes 4, etc.).

When a fielded buffer has many fields, access is expedited in FML by the use of an internal index. The user is normally unaware of the existence of this index. However, when you store a fielded buffer on disk, or transmit a fielded buffer between processes or between computers, you can save disk space and/or transmittal time by first discarding the index using Funindex() or Funindex32(), and then reconstructing the index later with Findex() or Findex32().

FML16 Conversion to FML32

Existing FML16 applications that are written correctly can easily be changed to use the FML32 interface. All variables used in the calls to the FML functions must use the proper typedefs (FLDID, FLDLEN, and FLDOCC). Any call to tpalloc() for an FML typed buffer should use the FMLTYPE definition instead of “FML”. The application source code can be changed to use the 32-bit functions simply by changing the include of fml.h to inclusion of fml32.h followed by fml1632.h. The fml1632.h contains macros that convert all of the 16-bit type definitions to 32-bit type definitions, and 16-bit functions and macros to 32-bit functions and macros.

VIEWS

VIEWS is a part of the Field Manipulation Language that allows the exchange of data between fielded buffers and C structures in a C language program, by specifying mappings of fields to members of C structures. If extensive manipulations of fielded buffer information are to be done, transferring the data to C structures will improve performance. Information in a fielded buffer can be extracted from the fields in a buffer and placed in a C structure using VIEWS functions, manipulated, and the updated values returned to the buffer, again using VIEWS functions.

Typed buffers is a feature of the ATMI environment that grew out of the FML idea of a fielded buffer. Two of the standard buffer types delivered with the ATMI environment are FML typed buffers and VIEW typed buffers. An additional difference of VIEW buffers is that they can be totally unrelated to an FML fielded buffer. The buffer types FML32 and VIEW32 can also be used.

A view description is created and stored in a source viewfile, as described in viewfile(5). The view description maps fields in fielded buffers to members in C structures. The source view descriptions are compiled, using viewc() or viewc32(), creating a view object file and can then be used to map data transferred between fielded buffers and C structures in a C program (see viewc, viewc32(1) for details). The view compiler also creates C header files that can be included in applications programs to define the structures described in view descriptions. A view disassembler, viewdis() or viewdis32(), is provided to translate object view descriptions into readable form (that is, back into source view descriptions); the output of the disassembler can be reinput to the view compiler (see viewdis, viewdis32(1) for details).

The object files are used at run time to manipulate the VIEW structures using the VIEWFILES and VIEWDIR environment variables. VIEWFILES should contain a comma-separated list of object viewfiles for the application. Files given as full pathnames are used as is; files listed as relative pathnames are searched for through the list of directories specified by the VIEWDIR variable (as described later in this section). VIEWDIR specifies a colon-separated list of directories to be used to find view object files with relative filenames. For VIEW32 structures, VIEWFILES32 and VIEWDIR32 are used.

In addition to the data types supported by most FML functions, VIEWS supports type int in source view descriptions. When the view description is compiled the view compiler automatically converts any int types to either short or long types, depending on your machine.

A decimal data type is also supported in VIEWS. It is defined as a field of type dec_t, and the size of the packed decimal value is given as the total number of bytes and the bytes to the right of the decimal point. While this field is not supported directly in FML, conversion of this field is automatic to/from any other field type supported in FML. Packed decimals exist in the COBOL environment as two decimal digits packed into one byte with the low-order half byte used to store the sign. In the C environment, the data type is defined by the dec_t type definition, which contains the decimal exponent, sign, digits, and the packed decimal value.

An FML buffer can be converted to a view using Fvftos() or Fvftos32(). A view can be converted to a fielded buffer using Fvstof() or Fvstof32(). When transferring data between fielded buffers and structures, the source data is automatically converted to the type of the destination data. Multiple field occurrences are supported; they are treated as an array in the structure. NULL values are used to indicate empty members in a structure, and can be specified by the user for each structure member in a viewfile. If the user does not specify a NULL value for a member, default NULL values are used. It is also possible to inhibit the transfer of data between a C structure member and a field in a fielded buffer, even though a mapping exists between them.

A VIEW can also be converted to and from a target record format. The default target format is IBM System/370 COBOL records. The Fvstot() function takes care of converting byte ordering, floating point and decimal format, and character sets (ASCII to EBCDIC), and Fvttos() converts back to the native format. 32-bit versions of these functions also exist. The Fcodeset() function can be used to specify alternate ASCII/EBCDIC transaction tables.

Error Handling

Most of the FML functions have one or more error returns. An error condition is indicated by an otherwise impossible returned value. This is usually -1 on error, or 0 for a bad field identifier (BADFLDID) or address. The error type is also made available in the external integer Ferror for FML16 and Ferror32 for FML32. Ferror and Ferror32 are not cleared on successful calls, so they should be tested only after an error has been indicated.

The F_error and F_error32 functions are provided to produce a message on the standard error output. They take one parameter, a string; print the argument string appended with a colon and a blank; and then print an error message followed by a newline character. The error message displayed is the one defined for the error number currently in Ferror or Ferror32, which is set when errors occur.

Fstrerror() can be used to retrieve from a message catalog the text of an error message; it returns a pointer that can be used to as an argument to userlog(3c).

The error codes that can be produced by an FML function are described on each FML reference page.

See Also

CFadd, CFadd32(3fml), CFchg, CFchg32(3fml), CFfind, CFfind32(3fml), CFfindocc, CFfindocc32(3fml), CFget, CFget32(3fml), CFgetalloc, CFgetalloc32(3fml), F_error, F_error32(3fml), Fadd, Fadd32(3fml), Fadds, Fadds32(3fml), Falloc, Falloc32(3fml), Fboolco, Fboolco32, Fvboolco, Fvboolco32(3fml), Fboolev, Fboolev32, Fvboolev, Fvboolev32(3fml), Fboolpr, Fboolpr32, Fvboolpr, Fvboolpr32(3fml), Fchg, Fchg32(3fml), Fchgs, Fchgs32(3fml), Fchksum, Fchksum32(3fml), Fcmp, Fcmp32(3fml), Fconcat, Fconcat32(3fml), Fcpy, Fcpy32(3fml), Fdel, Fdel32(3fml), Fdelall, Fdelall32(3fml), Fdelete, Fdelete32(3fml), Fextread, Fextread32(3fml), Ffind, Ffind32(3fml), Ffindlast, Ffindlast32(3fml), Ffindocc, Ffindocc32(3fml), Ffinds, Ffinds32(3fml), Ffloatev, Ffloatev32, Fvfloatev, Fvfloatev32(3fml), Ffprint, Ffprint32(3fml), Ffree, Ffree32(3fml), Fget, Fget32(3fml), Fgetalloc, Fgetalloc32(3fml), Fgetlast, Fgetlast32(3fml), Fgets, Fgets32(3fml), Fgetsa, Fgetsa32(3fml), Fidnm_unload, Fidnm_unload32(3fml), Fidxused, Fidxused32(3fml), Fielded, Fielded32(3fml), Findex, Findex32(3fml), Finit, Finit32(3fml), Fjoin, Fjoin32(3fml), Fldid, Fldid32(3fml), Fldno, Fldno32(3fml), Fldtype, Fldtype32(3fml), Flen, Flen32(3fml), Fmkfldid, Fmkfldid32(3fml), Fmove, Fmove32(3fml), Fname, Fname32(3fml), Fneeded, Fneeded32(3fml), Fnext, Fnext32(3fml), Fnmid_unload, Fnmid_unload32(3fml), Fnum, Fnum32(3fml), Foccur, Foccur32(3fml), Fojoin, Fojoin32(3fml), Fpres, Fpres32(3fml), Fprint, Fprint32(3fml), Fproj, Fproj32(3fml), Fprojcpy, Fprojcpy32(3fml), Fread, Fread32(3fml), Frealloc, Frealloc32(3fml), Frstrindex, Frstrindex32(3fml), Fsizeof, Fsizeof32(3fml), Fstrerror, Fstrerror32(3fml), Ftypcvt, Ftypcvt32(3fml), Ftype, Ftype32(3fml), Funindex, Funindex32(3fml), Funused, Funused32(3fml), Fupdate, Fupdate32(3fml), Fused, Fused32(3fml), Fvall, Fvall32(3fml), Fvals, Fvals32(3fml), Fvftos, Fvftos32(3fml), Fneeded, Fneeded32(3fml), Fvnull, Fvnull32(3fml), Fvopt, Fvopt32(3fml), Fvselinit, Fvselinit32(3fml), Fvsinit, Fvsinit32(3fml), Fvstof, Fvstof32(3fml), Fwrite, Fwrite32(3fml), field_tables(5), viewfile(5)

Programming an Oracle Tuxedo ATMI Application Using FML

 


CFadd, CFadd32(3fml)

Name

CFadd(), CFadd32() - convert and add field

Synopsis

#include <stdio.h>
#include "fml.h"
int CFadd(FBFR *fbfr, FLDID fieldid, char *value, FLDLEN len, int type)
#include fml32.h>
int
CFadd32(FBFR32 *fbfr, FLDID32 fieldid, char *value, FLDLEN32 len, int type)

Description

CFadd() acts like Fadd() but first converts the value from the user-specified type to the type of the fieldid for which the field is added to the fielded buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. value is a pointer to the value to be added. len is the length of the value to be added; it is required only if type is FLD_CARRAY. type is the data type of the field in value.

Before the field is added to the buffer, the type of the data item is converted from the type supplied by the user to the type specified in fieldid. If the source type is FLD_CARRAY (arbitrary character array), the len argument should be set to the length of the array; the length is ignored in all other cases. The value for the field to be converted and added must first be put in a variable, value, since C does not permit constructs such as 12345L.

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered when CFadd() or CFadd32() is being used, Ferror is set to FEBADOP.

CFadd32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to CFadd() or CFadd32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, CFadd() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) to string.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, a NULL value parameter was specified).

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a field buffer, but there is not enough space remaining in the buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, Fadd, Fadd32(3fml)

 


CFchg, CFchg32(3fml)

Name

CFchg(), CFchg32() - convert and change field

Synopsis

#include <stdio.h> 
#include "fml.h"
int CFchg(FBFR *fbfr, FLDID fieldid, FLDOCC oc, char *value,
FLDLEN len, int type)
#include "fml32.h"
int CFchg32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc,
char *value,
FLDLEN32 len, int type)

Description

CFchg() acts like Fchg() but first converts the value from the user-specified type to the type of the fieldid for which the field is changed in the fielded buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. value is a pointer to a new value. len is the length of the value to be changed; it is required only if type is FLD_CARRAY. type is the data type of value.

If a field occurrence is specified that does not exist, then NULL values are added for the missing occurrences until the desired value can be added (for example, changing field occurrence 4 for a field that does not exist in a buffer will cause 3 NULL values to be added followed by the specified field value).

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered when CFchg() or CFchg32() is being used, Ferror is set to FEBADOP.

CFchg32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to CFchg() or CFchg32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, CFchg() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) to string.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, a NULL value parameter was specified).

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a field buffer but there is not enough space remaining in the buffer.

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, CFadd, CFadd32(3fml), Fchg, Fchg32(3fml)

 


CFfind, CFfind32(3fml)

Name

CFfind(), CFfind32() - find, convert, and return pointer

Synopsis

#include <stdio.h> 
#include "fml.h"
char * CFfind(FBFR *fbfr, FLDID fieldid, FLDOCC oc, FLDLEN *len,
int type)
#include "fml32.h"
char *
CFfind32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, FLDLEN32 *len,
  int type)

Description

CFfind() finds a specified field in a buffer, converts it and returns a pointer to the converted value. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. len is used on output and is a pointer to the length of the converted value. type is the data type the user wants the field to be converted to.

Like Ffind(), the pointer returned by the function should be considered read-only. The validity of the pointer returned by CFfind() is guaranteed only until the next buffer operation, even if that operation is non-destructive, since the converted value is retained in a single private buffer. This differs from the value returned by Ffins(), which is guaranteed until the next modification of the buffer. Unlike Ffind(), CFfind() aligns the converted value for immediate use by the caller.

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered when CFfind() or CFfind32()is being used, Ferror is set to FEBADOP.

CFfind32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to CFfind() or CFfind32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

In the “Synopsis” section above the return value to CFfind() is described as a character pointer data type (char ** in C). Actually, the pointer returned points to an object that has the same type as the stored type of the field.

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, CFfind() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) to string.

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, Ffind, Ffind32(3fml)

 


CFfindocc, CFfindocc32(3fml)

Name

CFfindocc(), CFfindocc32() - find occurrence of converted value

Synopsis

#include <stdio.h> 
#include "fml.h"
FLDOCC
CFfindocc(FBFR *fbfr, FLDID fieldid, char *value, FLDLEN len, int
type)
#include "fml32.h"
FLDOCC32
CFfindocc32(FBFR32 *fbfr, FLDID32 fieldid, char *value, FLDLEN32
len, int type)

Description

CFfindocc() acts like Ffindocc() but first converts the value from the user-specified type to the type of fieldid. CFfindocc() looks for an occurrence of the specified field in the buffer that matches a user-supplied value, length and type. CFfindocc() returns the occurrence number of the first field that matches. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. value is a pointer to the value being sought. len is the length of the value to be compared to input value if type is FLD_CARRAY. type is the data type of the field in value.

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered when CFfindocc() or CFfindocc32() is being used, Ferror is set to FEBADOP.

CFfindocc32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to CFfindocc() or CFfindocc32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

If the field value is not found or if other errors are detected, -1 is returned and CFfindocc() sets Ferror to indicate the error condition.

Errors

Under the following conditions, CFfindocc() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) to string.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, a NULL value parameter was specified).

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, Ffindocc, Ffindocc32(3fml)

 


CFget, CFget32(3fml)

Name

CFget(), CFget32() - get field and convert

Synopsis

#include <stdio.h> 
#include "fml.h"
int
CFget(FBFR *
fbfr, FLDID fieldid, FLDOCC oc, char *buf, FLDLEN *len,
int
type)
#include "fml32.h"
int
CFget32(
FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, char *buf,
FLDLEN32 *
len, int type)

Description

CFget() is the conversion analog of Fget(). The main difference is that it copies a converted value to the user-supplied buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. buf is a pointer to private data area. On input, len is a pointer to the length of the private data area. On return, len is a pointer to the length of the returned value. If the len parameter is NULL on input, it is assumed that the buffer is big enough to contain the field value and the length of the value is not returned. If the buf parameter is NULL, the field value is not returned. type is the data type the user wants the returned value converted to.

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered when CFget() or CFget32() is being used, Ferror is set to FEBADOP.

CFget32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to CFget() or CFget32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, CFget() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) to string.

[FNOSPACE]

"no space in fielded buffer"
The size of the data area, as specified in len, is not large enough to hold the field value.

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, Fget, Fget32(3fml)

 


CFgetalloc, CFgetalloc32(3fml)

Name

CFgetalloc(), CFgetalloc32() - get field, allocate space, convert

Synopsis

#include <stdio.h> 
#include "fml.h"
char *
CFgetalloc(FBFR *fbfr, FLDID fieldid, FLDOCC oc, int type, FLDLEN
*extralen)
#include "fml32.h"
char *
CFgetalloc32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, int type,
FLDLEN32 *extralen)

Description

CFgetalloc() gets a specified field from a buffer, allocates space, converts the field to the type specified by the user and returns a pointer to its location. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. type is the data type the user wants the field to be converted to. On call, extralen is a pointer to the length of additional space that may be allocated to receive the value; on return, it is a pointer actual amount of space used. If extralen is NULL, then no additional space is allocated and the actual length is not returned. The user is responsible for freeing the returned (converted) value.

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered when CFgetalloc() or CFgetalloc32() is being used, Ferror is set to FEBADOP.

CFgetalloc32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to CFgetalloc() or CFgetalloc32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, CFgetalloc() returns a pointer to the converted value. On error, the function returns NULL and sets Ferror to indicate the error condition.

Errors

Under the following conditions, CFgetalloc() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, Fgetalloc, Fgetalloc32(3fml)

 


F_error, F_error32(3fml)

Name

F_error(), F_error32() - print error message for last error

Synopsis

#include stdio.h> 
#include "fml.h"
extern int Ferror;
void
F_error(char *msg)
#include "fml32.h"
extern int Ferror32;
void
F_error32(char *msg)

Description

The function F_error() works like perror() for UNIX system errors; that is, it produces a message on the standard error output (file descriptor 2), describing the last error encountered during a call to a system or library function. The argument string msg is printed first, then a colon and a blank, then the message and a newline. If msg is a NULL pointer or points to a NULL string, the colon is not printed. To be of most use, the argument string should include the name of the program that incurred the error. The error number is taken from the external variable Ferror, which is set when errors occur but not cleared when non-erroneous calls are made. In the MS-DOS and OS/2 environments, Ferror is redefined to FMLerror.

To immediately print an error message, F_error() should be called on an error return from another FML function. When the error message is FEUNIX. Uunix_err() is called.

F_error32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to F_error() or F_error32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

F_error() is declared a void and as such does not have return values.

See Also

Introduction to FML Functions

perror(3), Uunix_err(3) in a UNIX system reference manual

 


F32to16, F16to32(3fml)

Name

F32to16(), F16to32() - convert 16-bit FML to/from 32-bit FML buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
#include "fml32.h"
int
F32to16(FBFR *dest, FBFR32 *src)
int
F16to32(FBFR32 *dest, FBFR *src)

Description

F32to16() converts a 32-bit FML buffer to a 16-bit FML buffer. It does this by converting the buffer on a field-by-field basis and then creating the index for the fielded buffer. A field is converted by generating a FLDID from a FLDID32, and copying the field value (and field length for string, carray, and mbstring fields). dest and src are pointers to the destination and source fielded buffers respectively. The source buffer is not changed.

These functions can fail for lack of space; they can be reissued after allocating enough additional space to complete the operation.

F16to32() converts a 16-bit FML buffer to a 32-bit FML buffer. It lives in the fml32 library or shared object and sets Ferror32 on error.

F32to16() lives in the FML library or shared object and sets Ferror on error. Note that both fml.h and fml32.h must be included to use these functions; fml1632.h may not be included in the same file.

F32to16() fails with FBADFLD for the following field types: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. F16to32() has no impact when performed on these field types.

A thread in a multithreaded application may issue a call to F32to16() or F16to32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, F32to16()fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
Either the source buffer or the destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be copied to the destination fielded buffer but there is not enough space remaining in the buffer. This error is also returned if a 32-bit FML field is too long to fit into a 16-bit FML field. When this error is returned, the destination buffer will contain no fields.

[FBADFLD]

"invalid field number or type"
This error occurs only for the F32to16() function. The source buffer has a field identifier for which the field type is not one of the eight types supported by 16-bit FML, or the field number is greater than 8191.

See Also

Introduction to FML Functions

 


Fadd, Fadd32(3fml)

Name

Fadd(), Fadd32() - add new field occurrence

Synopsis

#include stdio.h> 
#include "fml.h"
int Fadd(FBFR *fbfr, FLDID fieldid, char *value, FLDLEN len)
#include "fml32.h"
int Fadd32(FBFR32 *fbfr, FLDID32 fieldid, char *value, FLDLEN32 len)

Description

Fadd() adds the specified field value to the given buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. value is a pointer to a new value; the pointer’s type must be the same fieldid type as the value to be added. len is the length of the value to be added; it is required only if type is FLD_CARRAY or FLD_MBSTRING.

The value to be added is contained in the location pointed to by the value parameter. If one or more occurrences of the field already exist, then the value is added as a new occurrence of the field, and is assigned an occurrence number 1 greater than the current highest occurrence (to add a specific occurrence, Fchg() must be used).

In the “Synopsis” section above the value argument to Fadd() is described as a character pointer data type (char * in C). Technically, this describes only one particular kind of value passable to Fadd(). In fact, the type of the value argument should be a pointer to an object of the same type as the type of the fielded-buffer representation of the field being added. For example, if the field is stored in the buffer as type FLD_LONG, then value should be of type pointer-to-long (long * in C). Similarly, if the field is stored as FLD_SHORT, then value should be of type pointer-to-short (short * in C). The important thing is that Fadd() assumes that the object pointed to by value has the same type as the stored type of the field being added.

For values of type FLD_PTR, Fadd32() stores the pointer value. The buffer pointed to by a FLD_PTR field must be allocated using the tpalloc() call. For values of type FLD_FML32, Fadd32() stores the entire FLD_FML32 field value, except the index. For values of type FLD_VIEW32, Fadd() stores a pointer to a structure of type FVIEWFLD, which contains vflags (a flags field, currently unused and set to 0), vname (a character array containing the viewname), and data (a pointer to the view data stored as a C structure). The application provides the vname and data to Fadd32().

For values of type FLD_MBSTRING, the value is the packed output argument of the Fmbpack32() function, and the len argument is the length of the value in the size output argument of Fmbpack32().

For values of type FLD_CARRAY, the len argument is the length of the value. For all types other than FLD_CARRAY or FLD_MBSTRING, the length of the object referenced by value is inferred from its type (for example, a value of type FLD_FLOAT is of length sizeof(float)), and the contents of len are ignored.

Fadd32 is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fadd() or Fadd32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fadd() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid. (For example, specifying a NULL value parameter to Fadd().)

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added in a fielded buffer but there is not enough space remaining in the buffer.

[FBADFLD]

"unknown field number or type"
A field number is specified which is not valid.

See Also

Introduction to FML Functions, CFadd, CFadd32(3fml), Fadds, Fadds32(3fml), Fchg, Fchg32(3fml)

 


Fadds, Fadds32(3fml)

Name

Fadds(), Fadds32() - convert value from type FLD_STRING and add to buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fadds(FBFR *fbfr, FLDID fieldid, char *value)
#include "fml32.h"
int
Fadds32(FBFR32 *fbfr, FLDID32 fieldid, char *value)

Description

Fadds() has been provided to handle the case of conversion from a user type of FLD_STRING to the field type of fieldid and add it to the fielded buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. value is a pointer to the value to be added.

This function calls CFadd() providing a type of FLD_STRING, and a len of 0.

Fadds32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fadds() or Fadds32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fadds() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added in a fielded buffer but there is not enough space remaining in the buffer.

[FTYPERR]

"invalid field type"
A field type is specified which is not valid.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, specifying a NULL value parameter to Fadds())

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed during conversion of carray (or mbstring) to string.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, CFchg, CFchg32(3fml), CFfind, CFfind32(3fml), CFget, CFget32(3fml), Falloc, Falloc32(3fml), Fchgs, Fchgs32(3fml), Ffinds, Ffinds32(3fml), Fgets, Fgets32(3fml), Fgetsa, Fgetsa32(3fml)

 


Falloc, Falloc32(3fml)

Name

Falloc(), Falloc32() - allocate and initialize fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
FBFR *
Falloc(FLDOCC F, FLDLEN V)
#include "fml32.h"
FBFR32 *
Falloc32(FLDOCC32 F, FLDLEN32 V)

Description

Falloc() dynamically allocates space using malloc() for a fielded buffer and calls Finit() to initialize it. The parameters are the number of fields, F, and the number of bytes of value space, V, for all fields that are to be stored in the buffer.

Falloc32() is used for larger buffers with more fields.

A thread in a multithreaded application may issue a call to Falloc() or Falloc32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Falloc() fails and sets Ferror to:

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, number of fields is less than 0, V is 0 or total size is greater than 65534).

See Also

Introduction to FML Functions, Ffree, Ffree32(3fml), Fielded, Fielded32(3fml), Finit, Finit32(3fml), Fneeded, Fneeded32(3fml), Frealloc, Frealloc32(3fml), Fsizeof, Fsizeof32(3fml), Funused, Funused32(3fml)

malloc(3) in a UNIX system reference manual

 


Fappend, Fappend32(3fml)

Name

Fappend(), Fappend32() - append new field occurrence

Synopsis

#include <stdio.h>
#include "fml.h"
int
Fappend(FBFR *fbfr, FLDID fieldid, char *value, FLDLEN len)
#include "fml32.h"
int
Fappend32(FBFR32 *fbfr, FLDID32 fieldid, char *value, FLDLEN32 len)

Description

Fappend() adds the specified field value to the end of the given buffer. Fappend() is useful in building large buffers in that it does not maintain the internal structures and ordering necessary for general purpose FML access. The side effect of this optimization is that a call to Fappend() may be followed only by additional calls to Fappend(), calls to the FML indexing routines Findex() and Funindex(), or calls to Free(), Fused(), Funused() and Fsizeof(). Calls to other FML routines made before calling Findex() or Funindex() will result in an error with Ferror set to FNOTFLD.

fbfr is a pointer to a fielded buffer. fieldid is a field identifier. value is a pointer to a new value; the pointer’s type must be the same fieldid type as the value to be added. len is the length of the value to be added; it is required only if type is FLD_CARRAY or FLD_MBSTRING.

The value to be added is contained in the location pointed to by the value parameter. If one or more occurrences of the field already exist, then the value is added as a new occurrence of the field, and is assigned an occurrence number 1 greater than the current highest occurrence (to add a specific occurrence, Fchg() must be used).

In the “Synopsis” section above the value argument to Fappend() is described as a character pointer data type (char * in C). Technically, this describes only one particular kind of value passable to Fappend(). In fact, the type of the value argument should be a pointer to an object of the same type as the type of the fielded-buffer representation of the field being added. For example, if the field is stored in the buffer as type FLD_LONG, then value should be of type pointer-to-long (long * in C). Similarly, if the field is stored as FLD_SHORT, then value should be of type pointer-to-short (short * in C). The important thing is that Fappend() assumes that the object pointed to by value has the same type as the stored type of the field being added.

For values of type FLD_MBSTRING, the value is the packed output argument of the Fmbpack32() function, and the len argument is the length of the value in the size output argument of Fmbpack32().

For values of type FLD_CARRAY, the len argument is the length of the value. For all types other than FLD_CARRAY or FLD_MBSTRING, the length of the object referenced by value is inferred from its type (for example, a value of type FLD_FLOAT is of length sizeof(float)), and the contents of len are ignored.

Fappend32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fappend() or Fappend32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fappend() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid. (for example, specifying a NULL value parameter to Fappend()).

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added in a fielded buffer but there is not enough space remaining in the buffer.

[FBADFLD]

"unknown field number or type"
A field number is specified which is not valid.

See Also

Introduction to FML Functions, Fadd, Fadd32(3fml), Ffree, Ffree32(3fml), Findex, Findex32(3fml), Fsizeof, Fsizeof32(3fml), Funindex, Funindex32(3fml), Funused, Funused32(3fml), Fused, Fused32(3fml)

 


Fboolco, Fboolco32, Fvboolco, Fvboolco32(3fml)

Name

Fboolco(), Fboolco32(), Fvboolco(), Fvboolco32() - compile expression, return evaluation tree

Synopsis

#include <stdio.h> 
#include "fml.h"
char *
Fboolco(char *expression)
char *
Fvboolco(char *expression, char *viewname)
#include "fml32.h"
char *
Fboolco32(char *expression)
char *
Fvboolco32(char *expression, char *viewname)

Description

Fboolco() compiles a Boolean expression, pointed to by expression, and returns a pointer to the evaluation tree. The expressions recognized are close to the expressions recognized in C. A description of the grammar can be found in the Programming an Oracle Tuxedo ATMI Application Using FML.

The evaluation tree produced by Fboolco() is used by the other Boolean functions listed under “See Also;” this avoids having to recompile the expression.

Fboolco32() is used with 32-bit FML.

Fvboolco() and Fvboolco32() provide the same functionality for views. The viewname parameter indicates the view from which the field offsets are taken.

This function fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered, Ferror is set to FEBADOP.

These functions are not supported on Workstation platforms.

A thread in a multithreaded application may issue a call to any of the functions documented here—Fboolco(), Fboolco32(), Fvboolco(), or Fvboolco32()—while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fboolco() fails and sets Ferror to:

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

[FSYNTAX]

"bad syntax in Boolean expression"
A syntax error was found in a Boolean expression by Fboolco() other than an unrecognized field name.

[FBADNAME]

"unknown field name"
A field name is specified which cannot be found in the field tables or viewfiles.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, expression is NULL).

[FBADVIEW]

"cannot find or get view"
viewname was not found in the files specified by VIEWDIR or VIEWFILES.

[FVFOPEN]

"cannot find or open viewfile"
While trying to find viewname, the program failed to find one of the files specified by VIEWDIR or VIEWFILES.

[EUNIX]

"operating system error"
While trying to find viewname, the program failed to open one of the files specified by VIEWDIR or VIEWFILES for reading.

[FVFSYNTAX]

"bad viewfile"
While trying to find viewname, one of the files specified by VIEWDIR or VIEWFILES was corrupted or not a viewfile.

[FMALLOC]

"malloc failed"
While trying to find viewname, malloc() failed while allocating space to hold the view information.

[FEBADOP]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, and FLD_VIEW32) is specified.

Example

#include "stdio.h" 
#include "fml.h"
extern char *Fboolco(\|);
char *tree;
...
if((tree=Fboolco("FIRSTNAME %% 'J.*n' & SEX = 'M'")) == NULL)
F_error("pgm_name");

This example compiles a Boolean expression that checks if the FIRSTNAME field is in the buffer, begins with 'J' and ends with 'n' (for example, John, Jean, Jurgen, etc.) and the SEX field equal to 'M'.

The first and second characters of the tree array form the least significant byte and the most significant byte, respectively, of an unsigned 16-bit quantity that gives the length, in bytes, of the entire array. This value is useful for copying or otherwise manipulating the array.

See Also

Fboolev, Fboolev32, Fvboolev, Fvboolev32(3fml), Fboolpr, Fboolpr32, Fvboolpr, Fvboolpr32(3fml), Fldid, Fldid32(3fml)

 


Fboolev, Fboolev32, Fvboolev, Fvboolev32(3fml)

Name

Fboolev(), Fboolev32(), Fvboolev(), Fvboolev32() - evaluate buffer against tree

Synopsis

#include stdio.h> 
#include "fml.h"
int
Fboolev(FBFR *fbfr, char *tree)
int
Fvboolev(char *cstruct, char *tree, char *viewname)
#include "fml32.h"
int
Fboolev32(FBFR32 *fbfr, char *tree)
int
Fvboolev32(char *cstruct, char *tree, char *viewname)

Description

Fboolev() takes a pointer to a fielded buffer, fbfr, and a pointer to the evaluation tree returned from Fboolco(), tree, and returns true (1) if the fielded buffer matches the specified Boolean conditions and false (0) if it does not. This function does not change either the fielded buffer or evaluation tree. The evaluation tree is one previously compiled by Fboolco().

Fboolev32() is used with 32-bit FML.

Fvboolev() and Fvboolev32() provide the same functionality for views. The viewname parameter indicates the view from which the field offsets are taken, and should be the same view specified for Fvboolco() or Fvboolco32().

These functions are not supported on Workstation platforms.

A thread in a multithreaded application may issue a call to any of the functions documented here—Fboolev(), Fboolev32(), Fvboolev(), or Fvboolev32()—while running in any context state, including TPINVALIDCONTEXT.

Return Values

Fboolev() returns 1 if the expression in the buffer matches the evaluation tree. It returns 0 if the expression fails to match the evaluation tree. This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fboolev() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The fbfr buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The fbfr buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, specifying a NULL tree parameter).

[FSYNTAX]

"bad syntax in Boolean expression"
A syntax error was found in a Boolean expression other than an unrecognized field name.

[FBADVIEW]

"cannot find or get view"
viewname was not found in the files specified by VIEWDIR or VIEWFILES.

[FVFOPEN]

"cannot find or open viewfile"
While trying to find viewname, the program failed to find one of the files specified by VIEWDIR or VIEWFILES.

[EUNIX]

"operating system error"
While trying to find viewname, the program failed to open one of the files specified by VIEWDIR or VIEWFILES for reading.

[FVFSYNTAX]

"bad viewfile"
While trying to find viewname, one of the files specified by VIEWDIR or VIEWFILES was corrupted or not a viewfile.

[FMALLOC]

"malloc failed"
While trying to find viewname, malloc() failed while allocating space to hold the view information.

Example

Using the evaluation tree compiled in the example for Fboolco():

#include stdio.h> 
#include "fml.h"
#include "fld.tbl.h"
FBFR *fbfr;
...
Fchg(fbfr,FIRSTNAME,0,"John",0);
Fchg(fbfr,SEX,0,"M",0);
if(Fboolev(fbfr,tree) > 0)
fprintf(stderr,"Buffer selected\\\\n");
else
fprintf(stderr,"Buffer not selected\\\\n");

would print Buffer selected.

See Also

Introduction to FML Functions, Fboolco, Fboolco32, Fvboolco, Fvboolco32(3fml), Fboolpr, Fboolpr32, Fvboolpr, Fvboolpr32(3fml)

 


Fboolpr, Fboolpr32, Fvboolpr, Fvboolpr32(3fml)

NAME

Fboolpr(), Fboolpr32(), Fvboolpr(), Fvboolpr32() - print Boolean expression as parsed

Synopsis

#include <stdio.h> 
#include "fml.h"
void
Fboolpr(char *tree, FILE *iop)
int
Fvboolpr(char *tree, FILE *iop, char *viewname)
#include "fml32.h"
void
Fboolpr32(char *tree, FILE *iop)
int
Fvboolpr32(char *tree, FILE *iop, char *viewname)

Description

Fboolpr() prints a compiled expression to the specified output stream. The evaluation tree, tree, is one previously created with Fboolco(). iop is a pointer of type FILE to the output stream. The output is fully parenthesized, as it was parsed (as indicated by the evaluation tree). The function is useful for debugging.

Fboolpr32() is used with 32-bit FML.

Fvboolpr() and Fvboolpr32() provide the same functionality for views. The viewname parameter indicates the view from which the field offsets are taken, and should be the same view specified for Fvboolco() or Fvboolco32().

These functions are not supported on Workstation platforms.

A thread in a multithreaded application may issue a call to any of the functions documented here—Fboolpr(), Fboolpr32(), Fvboolpr(), or Fvboolpr32()—while running in any context state, including TPINVALIDCONTEXT.

Return Values

Fboolpr() is declared as returning a void, so there are no return values. Fvboolpr() returns -1 if the viewname is not valid.

Errors

Under the following conditions, Fvboolpr() fails and sets Ferror to:

[FBADVIEW]

"cannot find or get view"
viewname was not found in the files specified by VIEWDIR or VIEWFILES.

[FVFOPEN]

"cannot find or open viewfile"
While trying to find viewname, the program failed to find one of the files specified by VIEWDIR or VIEWFILES.

[EUNIX]

"operating system error"
While trying to find viewname, the program failed to open one of the files specified by VIEWDIR or VIEWFILES for reading.

[FVFSYNTAX]

"bad viewfile"
While trying to find viewname, one of the files specified by VIEWDIR or VIEWFILES was corrupted or not a viewfile.

[FMALLOC]

"malloc failed"
While trying to find viewname, malloc() failed while allocating space to hold the view information.

Portability

This function is not supported using the Oracle Tuxedo System Workstation DLL for Windows.

See Also

Introduction to FML Functions, Fboolco, Fboolco32, Fvboolco, Fvboolco32(3fml)

 


Fchg, Fchg32(3fml)

Name

Fchg(), Fchg32() - change field occurrence value

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fchg(FBFR *fbfr, FLDID fieldid, FLDOCC oc, char *value, FLDLEN len)
#include "fml32.h"
int
Fchg32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, char *value,
FLDLEN32 len)

Description

Fchg() changes the value of a field in the buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. value is a pointer to a new value, its type must be the same type as the value to be changed (see below). len is the length of the value to be changed; it is required only if field type is FLD_CARRAY or FLD_MBSTRING.

If an occurrence of -1 is specified, then the field value is added as a new occurrence to the buffer. If the specified field occurrence is found, then the field value is modified to the value specified. If a field occurrence is specified that does not exist, then NULL values are added for the missing occurrences until the desired occurrence can be added (for example, changing field occurrence 4 for a field that does not exist on a buffer will cause 3 NULL values to be added followed by the specified field value). NULL values consist of the NULL string (1 byte in length) for string and character values, 0 for long and short fields, 0.0 for float and double values, and a zero-length string for a character array. The new or modified value is contained in value and its length is given in len if it is a character array (ignored in other cases). If value is NULL, then the field occurrence is deleted. A value to be deleted that is not found, is considered an error.

In the “Synopsis” section above the value argument to Fchg() is described as a character pointer data type (char * in C). Technically, this describes only one particular kind of value passable to Fchg(). In fact, the type of the value argument should be a pointer to an object of the same type as the type of the fielded-buffer representation of the field being changed. For example, if the field is stored in the buffer as type FLD_LONG, then value should be of type pointer-to-long (long * in C). Similarly, if the field is stored as FLD_SHORT, then value should be of type pointer-to-short (short * in C). The important thing is that Fchg() assumes that the object pointed to by value has the same type as the stored type of the field being changed.

For values of type FLD_PTR, Fchg32() stores the pointer value. The buffer pointed to by a FLD_PTR field must be allocated using the tpalloc() call. For values of type FLD_FML32, Fchg32() stores the entire FLD_FML32 field value, except the index. For values of type FLD_VIEW32, Fchg() stores a pointer to a structure of type FVIEWFLD, which contains vflags (a flags field, currently unused and set to 0), vname (a character array containing the viewname), and data (a pointer to the view data stored as a C structure). The application provides the vname and data to Fchg32().

For values of type FLD_MBSTRING, the value is the packed output argument of the Fmbpack32() function, and the len argument is the length of the value in the size output argument of Fmbpack32().

For values of type FLD_CARRAY, the len argument is the length of the value. For all types other than FLD_CARRAY or FLD_MBSTRING, the length of the object referenced by value is inferred from its type (for example, a value of type FLD_FLOAT is of length sizeof(float)), and the contents of len are ignored.

Fchg32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fchg() or Fchg32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fchg() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested for deletion but the specified field and/or occurrence was not found in the fielded buffer.

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a fielded buffer but there is not enough space remaining in the buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, CFchg, CFchg32(3fml), Fadd, Fadd32(3fml), Fcmp, Fcmp32(3fml), Fdel, Fdel32(3fml)

 


Fchgs, Fchgs32(3fml)

Name

Fchgs(), Fchgs32() - change field occurrence - caller presents string

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fchgs(FBFR *fbfr, FLDID fieldid, FLDOCC oc, char *value)
#include "fml32.h"
int
Fchgs32(FBFR32 *fbfr, FLDID32 fieldid, int oc, char *value)

Description

Fchgs(), is provided to handle the case of conversion from a user type of FLD_STRING. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. value is a pointer to the string to be added. The function calls its non-string-function counterpart, CFchg(), providing a type of FLD_STRING, and a len of 0 to convert from a string to the field type of fieldid.

Fchgs32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fchgs() or Fchgs32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fchgs() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a fielded buffer but there is not enough space remaining in the buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, CFchg, CFchg32(3fml), Fchg, Fchg32(3fml)

 


Fchksum, Fchksum32(3fml)

Name

Fchksum(), Fchksum32() - compute checksum for fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
long
Fchksum(FBFR *fbfr)
#include "fml32.h"
long
Fchksum32(FBFR32 *fbfr)

Description

For extra-reliable I/O, a checksum may be calculated using Fchksum() and stored in a fielded buffer being written out. fbfr is a pointer to a fielded buffer. The stored checksum may be inspected by the receiving process to verify that the entire buffer was received.

For values of type FLD_PTR, the name of the pointer field (rather than the pointer or the data referenced by the pointer) is included in the checksum calculation.

Fchksum32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fchksum() or Fchksum32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, Fchksum() returns the checksum. This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fchksum() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Fread, Fread32(3fml), Fwrite, Fwrite32(3fml)

 


Fcmp, Fcmp32(3fml)

Name

Fcmp(), Fcmp32() - compare two fielded buffers

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fcmp(FBFR *fbfr1, FBFR *fbfr2)
#include "fml32.h"
int
Fcmp32(FBFR32 *fbfr1, FBFR32 *fbfr2)

Description

Fcmp() compares the field identifiers and then the field values of two FML buffers. fbfr1 and fbfr2 are pointers to the fielded buffers to be compared.

For values of type FLD_PTR, two pointer fields are considered equal if the pointer values (addresses) are equal. For values of type FLD_FML32, two fields are considered equal if all field occurrences and values are equal. For values of type FLD_VIEW32, two fields are considered equal if the viewnames are the same, and if all structure member occurrences and values are equal.

Fcmp32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fcmp() or Fcmp32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

The function returns a 0 if the two buffers are identical. It returns a -1 on any of the following conditions:

Fcmp() returns a 1 if any of the reverse set of conditions is true, for example, the fieldid of a fbfr1 field is greater than the fieldid of the corresponding field of fbfr2. The actual sizes of the buffers (that is, the sizes passed to Falloc()) are not considered; only the data in the buffers. This function returns -2 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fcmp() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Fadd, Fadd32(3fml), Fchg, Fchg32(3fml)

 


Fconcat, Fconcat32(3fml)

Name

Fconcat(), Fconcat32() - concatenate source to destination buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fconcat(FBFR *dest, FBFR *src)
#include "fml32.h"
int
Fconcat32(FBFR32 *dest, FBFR32 *src)

Description

Fconcat() adds fields from the source buffer to the fields that already exist in the destination buffer. dest and src are pointers to the destination and source fielded buffers, respectively. Occurrences in the destination buffer, if any, are maintained and new occurrences from the source buffer are added with greater occurrence numbers for the field.

Fconcat32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fconcat() or Fconcat32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fconcat() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
Either the source or the destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added in a fielded buffer but there is not enough space remaining in the buffer.

See Also

Introduction to FML Functions, Fjoin, Fjoin32(3fml), Fupdate, Fupdate32(3fml)

 


Fcpy, Fcpy32(3fml)

Name

Fcpy(), Fcpy32() - copy source to destination buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fcpy(FBFR *dest, FBFR *src)
#include "fml32.h"
int
Fcpy32(FBFR32 *dest, FBFR32 *src)

Description

Fcpy() is used to copy the contents of one fielded buffer to another fielded buffer. dest and src are pointers to the destination and source fielded buffers respectively. Fcpy() expects the destination to be a fielded buffer, and thus can check that it is large enough to accommodate the data from the source buffer.

For values of type FLD_PTR, Fcpy32() copies the buffer pointer. The application programmer must manage the reallocation and freeing of buffers when the associated pointer is copied.

Fcpy32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fcpy() or Fcpy32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fcpy() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
Either the source or the destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
The destination buffer is not large enough to hold the source buffer.

See Also

Introduction to FML Functions, Fmove, Fmove32(3fml)

 


Fdel, Fdel32(3fml)

Name

Fdel(), Fdel32() - delete field occurrence from buffer

Synopsis

#include stdio.h> 
#include "fml.h"
int
Fdel(FBFR *fbfr, FLDID fieldid, FLDOCC oc)
#include "fml32.h"
int
Fdel32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc)

Description

Fdel() deletes the specified field occurrence from the buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field.

Note that when multiple occurrences of a field exist in the fielded buffer and a field occurrence is deleted that is not the last occurrence, also higher occurrences in the buffer are shifted down by one. To maintain the same occurrence number for all occurrences, use Fchg() to set the field occurrence value to a NULL value.

For values of type FLD_PTR, Fdel32() deletes the FLD_PTR field occurrence without changing the referenced buffer or freeing the pointer. The data buffer is treated as an opaque pointer.

Fdel32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fdel() or Fdel32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fdel() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fadd, Fadd32(3fml), Fchg, Fchg32(3fml), Fdelall, Fdelall32(3fml), Fdelete, Fdelete32(3fml)

 


Fdelall, Fdelall32(3fml)

Name

Fdelall(), Fdelall32() - delete all field occurrences from buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fdelall(FBFR *fbfr, FLDID fieldid)
#include "fml32.h"
int
Fdelall32(FBFR32 *fbfr, FLDID32 fieldid)

Description

Fdelall() deletes all occurrences of the specified field in the buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. If no occurrences of the field are found, it is considered an error.

For values of type FLD_PTR, Fdelall32() deletes the FLD_PTR field occurrence without changing the referenced buffer or freeing the pointer. The data buffer is treated as an opaque pointer.

Fdelall32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fdelall() or Fdelall32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fdelall() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field is requested but the specified field was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fdel, Fdel32(3fml), Fdelete, Fdelete32(3fml)

 


Fdelete, Fdelete32(3fml)

Name

Fdelete(), Fdelete32() - delete list of fields from buffer

Synopsis

#include <stdio.h>  
#include "fml.h"
int
Fdelete(FBFR *fbfr, FLDID *fieldid)
#include "fml32.h"
int
Fdelete32(FBFR32 *fbfr, FLDID32 *fieldid)

Description

Fdelete() deletes all occurrences of all fields listed in the array of field identifiers, fieldid[]. The last entry in the array must be BADFLDID. fbfr is a pointer to a fielded buffer. fieldid is a pointer to an array of field identifiers. This is a more efficient way of deleting several fields from a buffer instead of using several Fdelall() calls. The update is done in-place. The array of field identifiers may be rearranged by Fdelete() (they are sorted, if not already, in numeric order).

For values of type FLD_PTR, Fdelete32() deletes the FLD_PTR field occurrence without changing the referenced buffer or freeing the pointer. The data buffer is treated as an opaque pointer.

Fdelete() returns success even if no fields are deleted from the fielded buffer.

Fdelete32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fdelete() or Fdelete32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fdelete() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fdel, Fdel32(3fml), Fdelall, Fdelall32(3fml)

 


Fextread, Fextread32(3fml)

Name

Fextread(), Fextread32() - build fielded buffer from printed format

Synopsis

#include <stdio.h>  
#include "fml.h"
int
Fextread(FBFR *fbfr, FILE *iop)
#include "fml32.h"
int
Fextread32(FBFR32 *fbfr, FILE *iop)

Description

Fextread() may be used to construct a fielded buffer from its printed format (that is, from the output of Fprint()). The parameters are a pointer to a fielded buffer, fbfr, and a pointer to a file stream, iop. The input file format is basically the same as the output format of Fprint(), that is:

[flag] fldname or fldid tab> fldval (or fldname, if flag is ``='')

The optional flags and their meanings are as follows:

+

Occurrence 0 of the field in the fielded buffer should be changed to the value provided.

-

Occurrence 0 of the field named should be deleted from the fielded buffer. The tab character is required; any field value is ignored.

=

In this case, the last field on the input line is the name of a field in the fielded buffer. The value of occurrence 0 of that field should be assigned to occurrence 0 of the first field named on the input line.

#

The line is treated as a comment and is ignored.

If no flag is specified, a new occurrence of the field named by fldname with value fldval is added to the fielded buffer. A trailing newline (-) must be provided after each completed input buffer.

For values of type FLD_FML32 and FLD_VIEW32, Fextread32() generates nested FML32 buffers and VIEW32 fields, respectively. This function ignores the FLD_PTR field type. No error is returned if a value of type FLD_PTR is supplied to the function.

Fextread32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fextread() or Fextread32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fextread() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a field buffer but there is not enough space remaining in the buffer.

[FBADFLD]

"unknown field number or type"
A field number is specified which is not valid.

[FEUNIX]

"UNIX system call error"
A UNIX system call error occurred. The external integer errno should have been set to indicate the error by the system call, and the external integer Uunixerr (values defined in Uunix.h) is set to the system call that returned the error.

[FBADNAME]

"unknown field name"
A field name is specified which cannot be found in the field tables.

[FSYNTAX]

"bad syntax in format"
A syntax error was found in the external buffer format. Possible errors are: an unexpected end-of-file indicator, input lines not in the form fieldid or name tab> value two control characters, field values greater than 1000 characters, or an invalid hex escape sequence.

[FNOTPRES]

"field not present"
A field to be deleted is not found in the fielded buffer.

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

[FEINVAL]

"invalid parameter"
The value of iop is NULL.

Portability

This function is not supported using the Oracle Tuxedo System Workstation DLL for Windows.

See Also

Introduction to FML Functions, Fprint, Fprint32(3fml)

 


Ffind, Ffind32(3fml)

Name

Ffind(), Ffind32() - find field occurrence in buffer

Synopsis

#include <stdio.h>  
#include "fml.h"
char *
Ffind(FBFR *fbfr, FLDID fieldid, FLDOCC oc, FLDLEN *len)
#include "fml32.h"
char *
Ffind32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, FLDLEN32 *len)

Description

Ffind() finds the value of the specified field occurrence in the buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. If the field is found, its length is set into *len, and its location is returned as the value of the function. If the value of len is NULL, then the field length is not returned. Ffind() is useful for gaining read-only access to a field. In no case should the value returned by Ffind() be used to modify the buffer.

In general, because proper alignment within a buffer is not guaranteed, the locations in which the values of types FLD_LONG, FLD_FLOAT, FLD_DOUBLE, FLD_PTR, FLD_FML32, and FLD_VIEW32 are stored prevents these values from being used directly as their stored type. Such values must be copied first to a suitably aligned memory location. Accessing such fields through the conversion function CFfind() does guarantee the proper alignment of the found converted value. Buffer modification should be done only by the Fadd() or Fchg() function. The values returned by Ffind() and Ffindlast() are valid only so long as the buffer remains unmodified.

Ffind32() does not check for occurrences of the specified field in embedded buffers as provided by the FLD_FML32 and FLD_VIEW32 field types.

For a specified fieldid of type FLD_MBSTRING, the value returned by Ffind32() may be analyzed using the Fmbunpack(32) function.

Ffind32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ffind() or Ffind32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

In the “Synopsis” section above the return value to Ffind() is described as a character pointer data type (char * in C). Actually, the pointer returned points to an object that has the same type as the stored type of the field.

This function returns a pointer to NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffind() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Ffindlast, Ffindlast32(3fml), Ffindocc, Ffindocc32(3fml), Ffinds, Ffinds32(3fml)

 


Ffindlast, Ffindlast32(3fml)

Name

Ffindlast(), Ffindlast32() - find last occurrence of field in buffer

Synopsis

#include <stdio.h>  
#include "fml.h"
char *
Ffindlast(FBFR *fbfr, FLDID fieldid, FLDOCC *oc, FLDLEN *len) #include "fml32.h"
char *
Ffindlast32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 *oc, FLDLEN32 *len)

Description

Ffindlast() finds the last occurrence of a field in a buffer. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is a pointer to an integer that is used to receive the occurrence number of the field. len is the length of the value. If there are no occurrences of the field in the buffer, NULL is returned. Generally, Ffindlast() acts like Ffind(). The major difference is that with Ffindlast the user does not supply a field occurrence. Instead, both the value and occurrence number of the last occurrence of the field are returned. In order to return the occurrence number of the last field, the occurrence argument, oc, to Ffindlast() is a pointer-to-integer, and not an integer, as it is to Ffind(). If oc is specified to be NULL, the occurrence number of the last occurrence is not returned. If the value of len is NULL, then the field length is not returned.

In general, because proper alignment within a buffer is not guaranteed, the locations in which the values of types FLD_LONG, FLD_FLOAT, FLD_DOUBLE, FLD_PTR, FLD_FML32, and FLD_VIEW32 are stored prevents these values from being used directly as their stored type. Such values must be copied first to a suitably aligned memory location. Accessing such fields through the conversion function CFfind() does guarantee the proper alignment of the found converted value. Buffer modification should be done only by the Fadd() or Fchg() function. The values returned by Ffind()and Ffindlast() are valid only so long as the buffer remains unmodified.

Ffindlast32() does not check for occurrences of the specified field in embedded buffers as provided by the FLD_FML32 and FLD_VIEW32 field types.

For a specified fieldid of type FLD_MBSTRING, the value returned by Ffindlast32() may be analyzed using the Fmbunpack(32) function.

Ffindlast32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ffindlast() or Ffindlast32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

In the “Synopsis” section above the return value to Ffindlast() is described as a character pointer data type (char * in C). Actually, the pointer returned points to an object that has the same type as the stored type of the field.

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffindlast() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field is requested but the specified field was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, CFfind, CFfind32(3fml), Fadd, Fadd32(3fml), Fchg, Fchg32(3fml), Ffind, Ffind32(3fml), Ffindocc, Ffindocc32(3fml), Ffinds, Ffinds32(3fml)

 


Ffindocc, Ffindocc32(3fml)

Name

Ffindocc(), Ffindocc32() - find occurrence of field value

Synopsis

#include <stdio.h>  
#include "fml.h"
FLDOCC
Ffindocc(FBFR *fbfr, FLDID fieldid, char *value, FLDLEN len) #include "fml32.h"
FLDOCC32
Ffindocc32(FBFR32 *fbfr, FLDID32 fieldid, char *value, FLDLEN32 len)

Description

Ffindocc() looks at occurrences of the specified field in the buffer and returns the occurrence number of the first field occurrence that matches the user-specified field value. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. The value to be found is contained in the location pointed to by the value parameter. len is the length of the value if its type is FLD_CARRAY or FLD_MBSTRING. If fieldid is field type FLD_STRING and if len is not 0, pattern matching is done on the string. The pattern match supported is the same as the patterns described in regcmp(3) (in UNIX reference manuals). In addition, the alternation of regular expressions is supported (for example, ''A|B'' matches with ''A'' or ''B''). The pattern must match the entire field value (that is, the pattern ''value'' is implicitly treated as ''^value$''). The version of Ffindocc() provided for use in the MS-DOS and OS/2 environments does not support the regcmp() pattern matching for FLD_STRING fields; it uses strcmp() (in UNIX reference manuals).

In the “Synopsis” section above the value argument to Ffindocc() is described as a character pointer data type (char * in C). Technically, this describes only one particular kind of value passable to Ffindocc(). In fact, the type of the value argument should be a pointer to an object of the same type as the type of the fielded-buffer representation of the field being found. For example, if the field is stored in the buffer as type FLD_LONG, then value should be of type pointer-to-long (long * in C). Similarly, if the field is stored as FLD_SHORT, then value should be of type pointer-to-short (short * in C). The important thing is that Ffindocc() assumes that the object pointed to by value has the same type as the stored type of the field being found.

For values of type FLD_PTR, Ffindocc32() finds the occurrence of a field that matches a specified pointer value. For values of type FLD_FML32, two fields are considered equal if all field occurrences and values are equal. For values of type FLD_VIEW32, two fields are considered equal if the viewnames are the same, and if all structure member occurrences and values are equal.

For values of type FLD_MBSTRING, the value is the packed output argument of the Fmbpack32() function, and the len argument is the length of the value in the size output argument of Fmbpack32().

Ffindocc32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ffindocc() or Ffindocc32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffindocc() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field value is requested but the specified field and/or value was not found in the fielded buffer.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, passing a NULL value parameter to Ffindocc() or specifying an invalid string pattern).

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Ffind, Ffind32(3fml), Ffindlast, Ffindlast32(3fml), Ffinds, Ffinds32(3fml), regcmp(3) in a UNIX system reference manual

 


Ffinds, Ffinds32(3fml)

Name

Ffinds(), Ffinds32() - return ptr to string representation

Synopsis

#include <stdio.h>  
#include "fml.h"
char *
Ffinds(FBFR *fbfr, FLDID fieldid, FLDOCC oc)
#include "fml32.h"
char *
Ffinds32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc)

Description

Ffinds() is provided to handle the case of conversion to a user type of FLD_STRING. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. The specified field occurrence is found and converted from its type in the buffer to a NULL-terminated string. Basically, this macro calls its conversion function counterpart, CFfind(), providing a utype of FLD_STRING, and a ulen of 0. The duration of the validity of the pointer returned by Ffinds() is the same as that described for CFfind().

Ffinds32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ffinds() or Ffinds32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffinds() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field type is specified which is not valid.

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc()failed while converting carray (or mbstring) to string.

See Also

Introduction to FML Functions, CFfind, CFfind32(3fml), Ffind, Ffind32(3fml)

 


Ffloatev, Ffloatev32, Fvfloatev, Fvfloatev32(3fml)

Name

Ffloatev(), Ffloatev32(), Fvfloatev(), Fvfloatev32() - return value of expression as a double

Synopsis

#include <stdio.h> 
#include "fml.h"
double
Ffloatev(FBFR *fbfr, char *tree)
double
Fvfloatev(char *cstruct, char *tree, char *viewname)
#include "fml32.h"
double
Ffloatev32(FBFR32 *fbfr, char *tree)
double
Fvfloatev32(char *cstruct, char *tree, char *viewname)

Description

Ffloatev() takes a pointer to a fielded buffer, fbfr, and a pointer to the evaluation tree returned from Fboolco(), tree, and returns the value of the (arithmetic) expression, represented by the tree, as a double. This function does not change either the fielded buffer or the evaluation tree.

Ffloatev32() is used with 32-bit FML.

Fvfloatev() and Fvfloatev32() provide the same functionality for views. The viewname parameter indicates the view from which the field offsets are taken, and should be the same view specified for Fvboolco() or Fvboolco32().

These functions are not supported on Workstation platforms.

A thread in a multithreaded application may issue a call to any of the functions documented here—Ffloatev(), Ffloatev32(), Fvfloatev(), or Fvfloatev32()—while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success Ffloatev() returns the value of an expression as a double.

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffloatev() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

[FSYNTAX]

"bad syntax in Boolean expression"
A syntax error was found in a Boolean expression tree.

[FBADVIEW]

"cannot find or get view"
viewname was not found in the files specified by VIEWDIR or VIEWFILES.

[FVFOPEN]

"cannot find or open viewfile"
While trying to find viewname, the program failed to find one of the files specified by VIEWDIR or VIEWFILES.

[EUNIX]

"operating system error"
While trying to find viewname, the program failed to open one of the files specified by VIEWDIR or VIEWFILES for reading.

[FVFSYNTAX]

"bad viewfile"
While trying to find viewname, one of the files specified by VIEWDIR or VIEWFILES was corrupted or not a viewfile.

[FMALLOC]

"malloc failed"
While trying to find viewname, malloc() failed while allocating space to hold the view information.

See Also

Introduction to FML Functions, Fboolco, Fboolco32, Fvboolco, Fvboolco32(3fml), Fboolev, Fboolev32, Fvboolev, Fvboolev32(3fml)

 


Ffprint, Ffprint32(3fml)

Name

Ffprint(), Ffprint32() - print fielded buffer to specified stream

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Ffprint(FBFR *fbfr, FILE *iop)
#include "fml32.h"
int
Ffprint32(FBFR32 *fbfr, FILE *iop)

Description

Ffprint() is similar to Fprint(), except the text is printed to a specified output stream. fbfr is a pointer to a fielded buffer. iop is a pointer of type FILE that points to the output stream.

For each field in the buffer, the output prints the field name and field value separated by a tab. Fname() is used to determine the field name; if the field name cannot be determined, then the field identifier is printed. Non-printable characters in string and character array field values are represented by a backslash followed by their two-character hexadecimal value. A newline is printed following the output of the printed buffer.

For values of type FLD_PTR, Ffprint32() prints the field name or field identifier and the pointer value in hexadecimal. Although this function prints pointer information, the Fextread32() function ignores the FLD_PTR field type.

For values of type FLD_FML32, Ffprint32() recursively prints the FML32 buffer, with leading tabs added for each level of nesting. For values of type FLD_VIEW32, Ffprint32() prints the VIEW32 field name and structure member name/value pairs.

Ffprint32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ffprint() or Ffprint32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffprint() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

Portability

This function is not supported using the Oracle Tuxedo System Workstation DLL for Windows.

See Also

Introduction to FML Functions, Fprint, Fprint32(3fml)

 


Ffree, Ffree32(3fml)

Name

Ffree(), Ffree32() - free space allocated for fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Ffree(FBFR *fbfr)
#include "fml32.h"
int
Ffree32(FBFR32 *fbfr)

Description

Ffree() is used to recover space allocated to its argument fielded buffer. fbfr is a pointer to a fielded buffer. The fielded buffer is invalidated, that is, it is made non-fielded, and then freed. Ffree32() does not free the memory area referenced by a pointer in a FLD_PTR field.

Ffree() is recommended as opposed to free() (in UNIX system reference manuals), because Ffree()invalidates a fielded buffer whereas free() does not. It is important to invalidate fielded buffers because malloc() (in UNIX system reference manuals) reuses memory that has been freed without clearing it. Thus, if free() were used, it would be possible for malloc() to return a piece of memory that looks like a valid fielded buffer but is not.

Ffree32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ffree() or Ffree32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ffree() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Falloc, Falloc32(3fml), Frealloc, Frealloc32(3fml)

free(3), malloc(3) in a UNIX system reference manual

 


Fget, Fget32(3fml)

Name

Fget(), Fget32() - get copy and length of field occurrence

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fget(FBFR *fbfr, FLDID fieldid, FLDOCC oc, char *loc, FLDLEN
*maxlen)
#include "fml32.h"
int
Fget32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, char *loc,
FLDLEN32 *maxlen)

Description

Fget() should be used to retrieve a field from a fielded buffer when the value is to be modified. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. The caller provides Fget() with a pointer to a private data area, loc, as well as the length of the data area, *maxlen, and the length of the field is returned in *maxlen. If maxlen is NULL when the function is called, then it is assumed that the data area for the field value loc is big enough to contain the field value and the length of the value is not returned. If loc is NULL, the value is not retrieved. Thus, the function call can be used to determine the existence of the field.

In the “Synopsis” section above the value argument to Fget() is described as a character pointer data type (char * in C). Technically, this describes only one particular kind of value passable to Fget(). In fact, the type of the value argument should be a pointer to an object of the same type as the type of the fielded-buffer representation of the field being retrieved. For example, if the field is stored in the buffer as type FLD_LONG, then value should be of type pointer-to-long (long * in C). Similarly, if the field is stored as FLD_SHORT, then value should be of type pointer-to-short (short * in C). The important thing is that Fget() assumes that the object pointed to by value has the same type as the stored type of the field being retrieved.

For a specified fieldid of type FLD_MBSTRING, the value returned by Fget32() may be analyzed using the Fmbunpack(32) function.

Fget32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fget() or Fget32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

When Fget32() is used with the FLD_VIEW32 field type, a pointer to the FVIEWFLD structure is returned. This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fget() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space"
The size of the data area, as specified in maxlen, is not large enough to hold the field value.

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, CFget, CFget32(3fml), Fgetalloc, Fgetalloc32(3fml), Fgetlast, Fgetlast32(3fml), Fgets, Fgets32(3fml), Fgetsa, Fgetsa32(3fml)

 


Fgetalloc, Fgetalloc32(3fml)

Name

Fgetalloc(), Fgetalloc32() - allocate space and get copy of field occurrence

Synopsis

#include <stdio.h> 
#include "fml.h"
char *
Fgetalloc(FBFR *fbfr, FLDID fieldid, FLDOCC oc, FLDLEN *extralen)
#include "fml32.h"
char *
Fgetalloc32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, FLDLEN32
*extralen)

Description

Like Fget(), Fgetalloc() finds and makes a copy of a buffer field, but it acquires space for the field via a call to malloc() (in UNIX system programmer’s reference manuals). fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. The last argument to Fgetalloc(), extralen, provides an extra amount of space to be acquired in addition to the field value size. It can be used if the retrieved value is to be expanded before reinsertion into the fielded-buffer. If extralen is NULL, then no additional space is allocated and the actual length is not returned. It is the caller’s responsibility to free() space acquired by Fgetalloc(). The buffer will be aligned properly for any field type.

For a specified fieldid of type FLD_MBSTRING, the value returned by Fgetalloc32() may be analyzed using the Fmbunpack(32) function.

Fgetalloc32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fgetalloc() or Fgetalloc32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

In the “Synopsis” section above the return value to Fgetalloc() is described as a character pointer data type (char * in C). Actually, the pointer returned points to an object that has the same type as the stored type of the field. When Fgetalloc32() is used with the FLD_VIEW32 field type, a pointer to the FVIEWFLD structure is returned. This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fgetalloc() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FMALLOC]

“malloc failed"
Allocation of space dynamically using malloc() failed.

See Also

Introduction to FML Functions, CFget, CFget32(3fml), Fget, Fget32(3fml), Fgetlast, Fgetlast32(3fml), Fgets, Fgets32(3fml), Fgetsa, Fgetsa32(3fml)

free(3), malloc(3) in a UNIX system reference manual

 


Fgetlast, Fgetlast32(3fml)

Name

Fgetlast(), Fgetlast32() - get copy of last occurrence

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fgetlast(FBFR *fbfr, FLDID fieldid, FLDOCC *oc, char *value, FLDLEN
*maxlen)
#include "fml32.h"
int
Fgetlast32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 *oc, char
*value, FLDLEN32 *maxlen)

Description

Fgetlast() is used to retrieve both the value and occurrence number of the last occurrence of the field identified by fieldid. fbfr is a pointer to a fielded buffer. In order to return the occurrence number of the last field, the occurrence argument, oc, is a pointer-to-integer, not an integer.

The caller provides Fgetlast() with a pointer to a private buffer, loc, as well as the length of the buffer, *maxlen, and the length of the field is returned in *maxlen. If maxlen is NULL when the function is called, then it is assumed that the buffer for the field value is big enough to contain the field value and the length of the value is not returned. If loc is NULL, the value is not returned. If oc is NULL, the occurrence is not returned.

In the “Synopsis” section above the value argument to Fgetlast() is described as a character pointer data type (char * in C). Technically, this describes only one particular kind of value passable to Fgetlast(). In fact, the type of the value argument should be a pointer to an object of the same type as the type of the fielded-buffer representation of the field being retrieved. For example, if the field is stored in the buffer as type FLD_LONG, then value should be of type pointer-to-long (long * in C). Similarly, if the field is stored as FLD_SHORT, then value should be of type pointer-to-short (short * in C). The important thing is that Fgetlast()assumes that the object pointed to by value has the same type as the stored type of the field being retrieved.

For a specified fieldid of type FLD_MBSTRING, the value returned by Fgetlast32() may be analyzed using the Fmbunpack(32) function.

Fgetlast32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fgetlast() or Fgetlast32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fgetlast() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space"
The size of the data area, as specified in maxlen, is not large enough to hold the field value.

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fget, Fget32(3fml), Fgetalloc, Fgetalloc32(3fml), Fgets, Fgets32(3fml), Fgetsa, Fgetsa32(3fml)

 


Fgets, Fgets32(3fml)

Name

Fgets(), Fgets32() - get value converted to string

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Fgets(FBFR *fbfr, FLDID fieldid, FLDOCC oc, char *buf)
#include "fml32.h"
int
Fgets32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, char *buf)

Description

Fgets() retrieves a field occurrence from the fielded buffer first converting the value to a user type of FLD_STRING. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. The caller of Fgets() provides buf, a pointer to a private buffer, which is used for the retrieved field value. It is assumed that buf is large enough to hold the value. Basically, Fgets() calls CFget() with an assumed utype of FLD_STRING, and a ulen of 0.

Fgets32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fgets() or Fgets32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fgets() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

See Also

Introduction to FML Functions, CFget, CFget32(3fml), Fget, Fget32(3fml), Fgetalloc, Fgetalloc32(3fml), Fgetlast, Fgetlast32(3fml), Fgetsa, Fgetsa32(3fml)

 


Fgetsa, Fgetsa32(3fml)

Name

Fgetsa(), Fgetsa32() - use malloc() to allocate space and get converted value

Synopsis

#include <stdio.h> 
#include "fml.h"
char *
Fgetsa(FBFR *fbfr, FLDID fieldid, FLDOCC oc, FLDLEN *extra)
#include "fml32.h"
char *
Fgetsa32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc, FLDLEN32
*extra)

Description

Fgetsa() is a macro that calls CFgetalloc(). fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field. The function uses malloc() (in UNIX system programmer’s reference manuals) to allocate space for the retrieved field value that has been converted to a string. If extra is not NULL, it specifies the extra space to allocate in addition to the field value size; the total size is returned in extra.

It is the responsibility of the user to free() (in UNIX system reference manuals) the space malloc()’d.

Fgetsa32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fgetsa() or Fgetsa32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, the function returns a pointer to the allocated buffer.

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fgetsa() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

See Also

Introduction to FML Functions, CFget, CFget32(3fml), Fget, Fget32(3fml), Fgetlast, Fgetlast32(3fml), Fgets, Fgets32(3fml)

free(3), malloc(3) in a UNIX system reference manual

 


Fidnm_unload, Fidnm_unload32(3fml)

Name

Fidnm_unload(), Fidnm_unload32() - recover space from id->nm mapping tables

Synopsis

#include <stdio.h> 
#include "fml.h"
void
Fidnm_unload(void);
#include "fml32.h"
void
Fidnm_unload32(void);

Description

Fidnm_unload() recovers space allocated by Fname() for field identifier to field name mapping tables.

Fidnm_unload32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fidnm_unload() or Fidnm_unload32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function is declared as a void and so does not return anything.

See Also

Introduction to FML Functions, Fname, Fname32(3fml), Fnmid_unload, Fnmid_unload32(3fml)

 


Fidxused, Fidxused32(3fml)

Name

Fidxused(), Fidxused32() - return amount of space used

Synopsis

#include <stdio.h> 
#include "fml.h"
long
Fidxused(FBFR *fbfr)
#include "fml32.h"
long
Fidxused32(FBFR32 *fbfr)

Description

Fidxused() indicates the current amount of space used by the buffer’s index. fbfr is a pointer to a fielded buffer.

Fidxused32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fidxused() or Fidxused32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, the function returns the amount of space in the buffer used by the index. This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fidxused() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Findex, Findex32(3fml), Frstrindex, Frstrindex32(3fml), Funused, Funused32(3fml), Fused, Fused32(3fml)

 


Fielded, Fielded32(3fml)

Name

Fielded(), Fielded32() - return true if buffer is fielded

Synopsis

#include stdio.h> 
#include "fml.h"
int
Fielded(FBFR *fbfr)
#include "fml32.h"
int
Fielded32(FBFR32 *fbfr)

Description

Fielded() is used to test whether the specified buffer is fielded. fbfr is a pointer to a fielded buffer.

Fielded32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fielded() or Fielded32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

Fielded() returns true if the buffer is fielded. It returns false if the buffer is not fielded and does not set Ferror in this case.

See Also

Introduction to FML Functions, Finit, Finit32(3fml), Fneeded, Fneeded32(3fml), Fsizeof, Fsizeof32(3fml)

 


Findex, Findex32(3fml)

Name

Findex(), Findex32() - index a fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Findex(FBFR *fbfr, FLDOCC intvl)
#include "fml32.h"
int
Findex32(FBFR32 *fbfr, FLDOCC32 intvl)

Description

The function Findex() is called explicitly to index a fielded buffer. fbfr is a pointer to a fielded buffer. The second parameter, intvl, gives the indexing interval, that is, the ideal separation of indexed fields. If this argument has value 0, then the buffer’s current indexing value is used. If the current value itself is 0, the value FSTDXINTVL (defaults to 16) is used. Using an indexing value of 1 will ensure that every field in the buffer is indexed. The size of the index interval and the amount of space allocated to a buffer’s index are inversely proportional: the smaller the interval, the more fields are indexed and thus the larger the amount of space used for indexing.

Findex32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Findex() or Findex32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Findex() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
An ENTRY is to be added to the index but there is not enough space remaining in the buffer.

See Also

Introduction to FML Functions, Fidxused, Fidxused32(3fml), Frstrindex, Frstrindex32(3fml), Funindex, Funindex32(3fml)

 


Finit, Finit32(3fml)

Name

Finit(), Finit32() - initialize fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"
int
Finit(FBFR *fbfr, FLDLEN buflen)
#include "fml32.h"
int
Finit32(FBFR32 *fbfr, FLDLEN32 buflen)

Description

Finit() can be called to initialize a fielded buffer statically. fbfr is a pointer to a fielded buffer. buflen is the length of the buffer. The function takes the buffer pointer and buffer length, and sets up the internal structure for a buffer with no fields. Finit() can also be used to reinitialize a previously used buffer.

Finit32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Finit() or Finit32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Finit() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer pointer is NULL.

[FNOSPACE]

"no space in fielded buffer"
The buffer size specified is too small for a fielded buffer.

Example

The correct way to reinitialize a buffer to have no fields is: Finit(fbfr, (FLDLEN)Fsizeof(fbfr));

See Also

Introduction to FML Functions, Falloc, Falloc32(3fml), Fneeded, Fneeded32(3fml), Frealloc, Frealloc32(3fml)

 


Fjoin, Fjoin32(3fml)

Name

Fjoin(), Fjoin32() - join source into destination buffer

Synopsis

#include stdio.h> 
#include "fml.h"
int
Fjoin(FBFR *dest, FBFR *src)
#include "fml32.h"
int
Fjoin32(FBFR32 *dest, FBFR32 *src)

Description

Fjoin() is used to join two fielded buffers based on matching fieldid/occurrence. dest and src are pointers to the destination and source fielded buffers respectively. For fields that match on fieldid/occurrence, the field value is updated in the destination buffer with the value in the source buffer. Fields in the destination buffer that have no corresponding fieldid/occurrence in the source buffer are deleted. If joining buffers results in the removal of a FLD_PTR field, the memory area referenced by the pointer is not modified or freed.

This function may fail due to lack of space if the new values are larger than the old; in this case, the destination buffer is modified. If this happens, however, the destination buffer may be reallocated using Frealloc() and repeated calls to the Fjoin() function. Even if the destination buffer has been partially updated, the correct results are obtained by repeating the Fjoin() function.

Fjoin32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fjoin() or Fjoin32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fjoin() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
Either the source buffer or the destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a field buffer but there is not enough space remaining in the buffer.

Example

In the following example:

FBFR *src, *dest;  ...  if(Fjoin(dest,src)  0)  F_error("pgm_name");

if dest has fields A, B, and two occurrences of C, and src has fields A, C, and D, the resultant dest will have source field value A and source field value C.

See Also

Introduction to FML Functions, Fconcat, Fconcat32(3fml), Fojoin, Fojoin32(3fml), Fproj, Fproj32(3fml), Fprojcpy, Fprojcpy32(3fml), Frealloc, Frealloc32(3fml)

 


Fldid, Fldid32(3fml)

Name

Fldid(), Fldid32() - map field name to field identifier

Synopsis

#include <stdio.h> 
#include "fml.h"

FLDID
Fldid(char *name)

#include "fml32.h"

FLDID32
Fldid32(char *name)

Description

Fldid() provides a run-time translation of a field name to its field identifier and returns a FLDID corresponding to its field name parameter. The first invocation causes space to be dynamically allocated for the field tables and the tables to be loaded. To recover data space used by the field tables loaded by Fldid(), the user may unload the files by a call to the Fnmid_unload() function.

Fldid32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fldid() or Fldid32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns BADFLDID on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fldid() fails and sets Ferror to:

[FBADNAME]

"unknown field name"
A field name is specified which cannot be found in the field tables.

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

See Also

Introduction to FML Functions, Fldno, Fldno32(3fml), Fname, Fname32(3fml), Fnmid_unload, Fnmid_unload32(3fml)

malloc(3) in a UNIX system reference manual

 


Fldno, Fldno32(3fml)

Name

Fldno(), Fldno32() - map field identifier to field number

#include <stdio.h> 
#include "fml.h"

int
Fldno(FLDID fieldid)

#include "fml32.h"

long
Fldno32(FLDID32 fieldid)

Description

Fldno() accepts a field identifier, fieldid, as a parameter and returns the field number contained in the identifier.

Fldno32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fldno() or Fldno32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns the field number and does not return an error.

See Also

Introduction to FML Functions, Fldid, Fldid32(3fml), Fldtype, Fldtype32(3fml)

 


Fldtype, Fldtype32(3fml)

Name

Fldtype(), Fldtype32() - map field identifier to field type

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fldtype(FLDID fieldid)

#include "fml32.h"

int
Fldtype32(FLDID32 fieldid)

Description

Fldtype() accepts a field identifier, fieldid, and returns the field type contained in the identifier (an integer), as defined in fml.h.

Fldtype32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fldtype() or Fldtype32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns the field type.

See Also

Introduction to FML Functions, Fldid, Fldid32(3fml), Fldno, Fldno32(3fml)

 


Flen, Flen32(3fml)

Name

Flen(), Flen32() - return len of field occurrence in buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Flen(FBFR *fbfr, FLDID fieldid, FLDOCC oc)

#include "fml32.h"

long
Flen32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc)

Description

Flen() finds the value of the specified field occurrence in the buffer and returns its length. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field.

For values of type FLD_PTR, Flen32() returns a fixed length for a pointer field based on sizeof(char*). For values of type FLD_FML32, Flen32() returns the value of Fused32() for the length of the nested buffer. For values of type FLD_VIEW32, Flen32() returns the length of the view data plus the length of the viewname.

For values of type FLD_MBSTRING, Flen32() returns the length of the packed output created by the Fmbpack32() function.

Flen32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Flen() or Flen32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, Flen() returns the field length.

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Flen() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOTPRES]

"field not present"
A field occurrence is requested but the specified field and/or occurrence was not found in the fielded buffer.

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fnum, Fnum32(3fml), Fpres, Fpres32(3fml)

 


Fmbpack32(3fml)

Name

Fmbpack32() - prepare encoding name and multibyte data information

Synopsis

#include "fml32.h"
int
Fmbpack32 (char *enc,void *ind,FLDLEN32 indlen,void
*packed,FLDLEN32 *size,long flags)

Description

Fmbpack32() prepares the encoding name and multibyte data information for an FLD_MBSTRING field input to an FML32 typed buffer. Fmbpack32() is used before the FLD_MBSTRING field is added to an FML32 buffer via FML32 APIs.

enc, if not NULL, is a NULL-terminated ASCII string containing the code-set encoding name for the ind code-set multibyte data. If enc is NULL and the flags argument is 0, the encoding name that is to be included in the packed output is obtained from the process TPMBENC environment variable. If the flags argument is FBUFENC, enc is ignored.

ind is the code-set multibyte data.

indlen is the number of bytes in ind.

packed is a pointer to an output for Fmbpack32(). It is used as an input value to FML32 APIs that include FLD_MBSTRING fields in an FML32 buffer. The packed area must be aligned on a FLDLEN32(TM32U) boundary.

size, on input, is the size of memory pointed to by packed. If the size is not large enough to handle the result of Fmbpack32(), FNOSPACE is returned and size is reset to the number of bytes that packed should be. After successful execution of Fmbpack32(), size is reset to the actual number of bytes used.

flags is 0 or FBUFENC. If flags is set to FBUFENC, Fmbpack32() ignores the enc argument and includes FBUFENC with the input data to packed. Without the inclusion of an encoding name, the packed output forces the FML32 API processing the FLD_MBSTRING field to get the encoding name from the FML32 buffer. Therefore, usage of FBUFENC also requires the application developer to use tpsetmbenc() to set the encoding name for the FML32 buffer.

Return Values

On success, Fmbpack32() returns a positive value. On error, Fmbpack32() returns -1 and sets Ferror32 to indicate the error condition.

Errors

Under the following conditions, Fmbpack32() fails and sets Ferror32 to:

[FEINVAL]

ind, packed, or size is NULL. enc or indlen is not valid.

[FNOSPACE]

The size of packed is not sufficient to handle the result of Fmbpack32().

See Also

Fmbunpack32(3fml), tpconvfmb32(3fml), tpsetmbenc(3c), tuxgetmbenc(3c), tuxsetmbenc(3c)

 


Fmbunpack32(3fml)

Name

Fmbunpack32() - extract encoding name and multibyte data information

Synopsis

#include "fml32.h"
int
Fmbunpack32 (void *packed,FLDLEN32 ilen,char *enc,void
*outd,FLDLEN32 *olen,long flags)

Description

Fmbunpack32() extracts the encoding name and multibyte data information from an FLD_MBSTRING field in an FML32 typed buffer. Fmbunpack32() is used after the FLD_MBSTRING field is extracted from an FML32 buffer via FML32 APIs (Ffind32(), Fget32(), ...).

packed is a pointer to the FLD_MBSTRING field data output from an FML32 API.

ilen is the number of bytes for packed.

enc is a NULL-terminated ASCII string in packed containing the encoding name when the code-set encoding name for the FLD_MBSTRING field is part of the packed information. If the FLD_MBSTRING field was created by Fmbpack32() with flag FBUFENC, enc is set to NULL. For the latter case, the application developer must use tpgetmbenc() on the FML32 buffer to get the encoding name for the FLD_MBSTRING field.

outd contains the multibyte data extracted from packed upon successful completion of Fmbunpack32().

olen, on input, is the size of memory pointed to by outd. If the size is not large enough to handle the result of Fmbunpack32(), FNOSPACE is returned and olen is reset to the number of bytes that outd should be. After successful execution of Fmbunpack32(), olen is reset to the actual number of bytes used.

flags is currently not used and should be set to 0.

Return Values

On success, Fmbunpack32() returns a positive value. On error, Fmbunpack32() returns -1 and sets Ferror32 to indicate the error condition.

Errors

Under the following conditions, Fmbunpack32() fails and sets Ferror32 to:

[FEINVAL]

outd, olen, or packed is NULL. packed or ilen is not valid.

[FNOSPACE]

The size of outd is not sufficient to handle the result of Fmbunpack32().

See Also

Fmbpack32(3fml), tpconvfmb32(3fml), tpgetmbenc(3c), tuxgetmbenc(3c), tuxsetmbenc(3c)

 


Fmkfldid, Fmkfldid32(3fml)

Name

Fmkfldid(), Fmkfldid32() - make a field identifier

#include <stdio.h> 
#include "fml.h"

FLDID
Fmkfldid(int type, FLDID num)

#include "fml.h"

FLDID32
Fmkfldid32(int type, FLDID32 num)

Description

Fmkfldid() allows the creation of a valid field identifier from a valid type (as defined in fml.h) and a field number. This is useful for writing an application generator that chooses field numbers sequentially, or for recreating a field identifier.

type is a valid type (an integer; see Fldtype, Fldtype32(3fml)). num is a field number (it should be an unused field number to avoid confusion with existing fields).

Fmkfldid32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fmkfldid() or Fmkfldid32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns BADFLDID on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fmkfldid() fails and sets Ferror to:

[FBADFLD]

"unknown field number or type"
A field number is specified which is not valid.

[FTYPERR]

"invalid field type"
A field type is specified which is not valid (as defined in fml.h).

See Also

Introduction to FML Functions, Fldtype, Fldtype32(3fml)

 


Fmove, Fmove32(3fml)

Name

Fmove(), Fmove32() - move fielded buffer to destination

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fmove(char *dest, FBFR *src)

#include "fml32.h"

int
Fmove32(char *dest, FBFR32 *src)

Description

Fmove() should be used when copying from a fielded buffer to any type of buffer. dest and src are pointers to the destination buffer and the source fielded buffers respectively.

The difference between Fmove() and Fcpy() is that Fcpy() expects the destination to be a fielded buffer and thus can make sure it is of sufficient size to accommodate the data from the source buffer. Fmove() makes no such check, blindly moving Fsizeof() bytes of data from the source fielded buffer to the target buffer. The destination buffer must be aligned on a short boundary.

For values of type FLD_PTR, Fmove32() transfers the buffer pointer. The application programmer must manage the reallocation and freeing of buffers when the associated pointer is moved.

Fmove32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fmove() or Fmove32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fmove() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The source or destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The source buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Fcpy, Fcpy32(3fml), Fsizeof, Fsizeof32(3fml)

 


Fname, Fname32(3fml)

Name

Fname(), Fname32() - map field identifier to field name

Synopsis

#include <stdio.h> 
#include "fml.h"

char *
Fname(FLDID fieldid)

#include "fml32.h"

char *
Fname32(FLDID32 fieldid)

Description

Fname() provides a run-time translation of a field identifier, fieldid, to its field name and returns a pointer to a character string containing the name corresponding to its argument. The first invocation causes space to be dynamically allocated for the field tables and the tables to be loaded. The table space used by the mapping tables created by Fname() may be recovered by a call to the function Fidnm_unload().

Fname32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fname() or Fname32() while running in any context state, including TPINVALIDCONTEXT.

The returned pointer is maintained in an internal FML table. If a multi-threaded application decides to de-reference the returned pointer, thread-safety should be ensured by the application code itself. Specifically, the pointer returned by Fname should not be de-referenced, once Fnmid_unload/Fidnm_unload is issued.

Return Values

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fname() fails and sets Ferror to:

[FBADFLD]

"unknown field number or type"
A field number is specified for which a field name cannot be found or is invalid (0).

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

See Also

Introduction to FML Functions, Ffprint, Ffprint32(3fml), Fidnm_unload, Fidnm_unload32(3fml), Fldid, Fldid32(3fml), Fprint, Fprint32(3fml)

 


Fneeded, Fneeded32(3fml)

Name

Fneeded(), Fneeded32() - compute size needed for buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

long
Fneeded(FLDOCC F, FLDLEN V)

#include "fml32.h"

long
Fneeded32(FLDOCC32 F, FLDLEN32 V)

Description

Fneeded() is used to determine the space that must be allocated for a fielded buffer. The F argument is the number of fields, and the V argument is the space for all field values, in bytes.

Fneeded32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fneeded() or Fneeded32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fneeded() fails and sets Ferror to:

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, number of fields is less than 0, V is 0 or total size is greater than 65534).

See Also

Introduction to FML Functions, Falloc, Falloc32(3fml), Fielded, Fielded32(3fml), Finit, Finit32(3fml), Fsizeof, Fsizeof32(3fml), Funused, Funused32(3fml), Fused, Fused32(3fml)

 


Fnext, Fnext32(3fml)

Name

Fnext(), Fnext32() - get next field occurrence

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fnext(FBFR *fbfr, FLDID *fieldid, FLDOCC *oc, char *value, FLDLEN *len)

#include "fml32.h"

int
Fnext32(FBFR32 *fbfr, FLDID32 *fieldid, FLDOCC32 *oc, char *value, FLDLEN32 *len)

Description

Fnext() finds the next field in the buffer after the specified field occurrence. fbfr is a pointer to a fielded buffer. fieldid is a pointer to a field identifier. oc is a pointer to the occurrence number of the field. value is a pointer to the value of the next field. len is the length of the next value.

The field identifier, FIRSTFLDID, should be specified to get the first field in the buffer (for example, on the first call to Fnext()). If value is not NULL, the next field value is copied into value; *len is used to determine if the buffer has enough space allocated to contain the value. The value’s length is returned in *len. If len is NULL when the function is called, it is assumed that there is enough space and the new value length is not returned. If value is NULL, the value is not retrieved and only fieldid and oc are updated. The *fieldid and *oc parameters are respectively set to the next found field and occurrence. If no more fields are found, 0 is returned (end of buffer) and *fieldid, *oc, and *value are left unchanged. Fields are returned in field identifier order.

Although the type of value is char *, the value returned will be of the same type as the next field being retrieved.

When the type of the field to be retrieved is FLD_VIEW32, the value parameter points to a FVIEWFLD structure. The Fnext() function populates the vname and data fields in the structure.

Fnext32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fnext() or Fnext32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

Fnext() returns 1 when the next occurrence is successfully found. It returns 0 when the end of the buffer is reached.

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fnext() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space"
The size of value, as specified in len, is not large enough to hold the field value.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, specifying NULL for fieldid or oc).

See Also

Introduction to FML Functions, Fget, Fget32(3fml), Fnum, Fnum32(3fml)

 


Fnmid_unload, Fnmid_unload32(3fml)

Name

Fnmid_unload(), Fnmid_unload32() - recover space from nm->id mapping tables

Synopsis

#include <stdio.h> 
#include "fml.h"
void Fnmid_unload(void)
#include "fml32.h"
void Fnmid_unload32(void)

Description

To recover data space used by the field tables loaded by Fldid(), the user may unload the files by a call to the Fnmid_unload() function.

Fnmid_unload32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fnmid_unload() or Fnmid_unload32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function is declared as a void and so does not return anything.

See Also

Introduction to FML Functions, Fidnm_unload, Fidnm_unload32(3fml), Fldid, Fldid32(3fml)

 


Fnum, Fnum32(3fml)

Name

Fnum(), Fnum32() - return count of all occurrences in buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

FLDOCC
Fnum(FBFR *fbfr)

#include "fml32.h"

FLDOCC32
Fnum32(FBFR *fbfr)

Description

Fnum() returns the number of fields contained in the specified buffer. fbfr is a pointer to a fielded buffer. The FLD_FML32 and FLD_VIEW32 fields are each counted as a single field, regardless of the number of fields they contain.

Fnum32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fnum() or Fnum32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fnum() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Foccur, Foccur32(3fml), Fpres, Fpres32(3fml)

 


Foccur, Foccur32(3fml)

Name

Foccur(), Foccur32() - return count of field occurrences in buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

FLDOCC
Foccur(FBFR *fbfr, FLDID fieldid)

#include "fml32.h"

FLDOCC32 Foccur32(FBFR32 *fbfr, FLDID32 fieldid)

Description

Foccur() is used to determine the number of occurrences of the field specified by fieldid in the buffer referenced by fbfr. Occurrences of a field within an embedded FML32 buffer are not counted, as in the FLD_FML32 field type.

Foccur32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Foccur() or Foccur32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, Foccur() returns the number of occurrences; if none are found, it returns 0.

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Foccur() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fnum, Fnum32(3fml), Fpres, Fpres32(3fml)

 


Fojoin, Fojoin32(3fml)

Name

Fojoin(), Fojoin32() - outer join source into destination buffer

#include <stdio.h> 
#include "fml.h"

int
Fojoin(FBFR *dest, FBFR *src)

#include "fml32.h"

int
Fojoin32(FBFR32 *dest, FBFR32 *src)

Description

Fojoin() is similar to Fjoin(), but it keeps fields from the destination buffer, dest, that have no corresponding fieldid/occurrence in the source buffer, src. Fields that exist in the source buffer that have no corresponding fieldid/occurrence in the destination buffer are not added to the destination buffer. If joining buffers results in the removal of a FLD_PTR field, the memory area referenced by the pointer is not modified or freed.

As with Fjoin(), this function can fail for lack of space; it can be reissued to complete the operation after more space is allocated.

Fojoin32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fojoin() or Fojoin32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fojoin() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
Either the source buffer or the destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a field buffer but there is not enough space remaining in the buffer.

Example

In the following example,

if(Fojoin(dest,src) 0)
F_error("pgm_name");

if dest has fields A, B, and two occurrences of C, and src has fields A, C, and D, the resultant dest will contain the source field value A, the destination field value B, the source field value C, and the second destination field value C.

See Also

Introduction to FML Functions, Fconcat, Fconcat32(3fml), Fjoin, Fjoin32(3fml), Fproj, Fproj32(3fml)

 


Fpres, Fpres32(3fml)

Name

Fpres(), Fpres32() - true if field occurrence is present in buffer

#include <stdio.h> 

#include "fml.h"

int
Fpres(FBFR *fbfr, FLDID fieldid, FLDOCC oc)

#include "fml32.h"

int
Fpres32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc)

Description

Fpres() is used to detect whether a given occurrence (oc) of a specified field (fieldid) exists in the buffer referenced by fbfr. Fpres32() does not check for occurrences of the specified field within an embedded buffer, as in the FLD_FML32 field type.

Fpres32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fpres() or Fpres32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

Fpres() returns true if the specified occurrence exists and false otherwise.

See Also

Introduction to FML Functions, Ffind, Ffind32(3fml), Fnum, Fnum32(3fml), Foccur, Foccur32(3fml)

 


Fprint, Fprint32(3fml)

Name

Fprint(), Fprint32() - print buffer to standard output

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fprint(FBFR *fbfr)

#include "fml32.h"

int
Fprint32(FBFR32 *fbfr)

Description

Fprint() prints the specified buffer to the standard output. fbfr is a pointer to a fielded buffer. For each field in the buffer, the output prints the field name and field value separated by a tab. Fname() is used to determine the field name; if the field name cannot be determined, then the field identifier is printed. Non-printable characters in string and character array field values are represented by a backslash followed by their two-character hexadecimal value. A newline is printed following the output of the printed buffer.

For values of type FLD_PTR, Fprint32() prints the field name or field identifier and the pointer value in hexadecimal. Although this function prints pointer information, the Fextread32() function ignores the FLD_PTR field type.

For values of type FLD_FML32, Fprint32() recursively prints the FML32 buffer, with leading tabs added for each level of nesting. For values of type FLD_VIEW32, Fprint32() prints the VIEW32 field name and structure member name/value pairs.

Fprint32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fprint() or Fprint32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fprint() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed.

See Also

Introduction to FML Functions, Fextread, Fextread32(3fml), Ffprint, Ffprint32(3fml), Fname, Fname32(3fml)

 


Fproj, Fproj32(3fml)

Name

Fproj(), Fproj32() - projection on buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fproj(FBFR *fbfr, FLDID *fieldid)

#include "fml32.h"

int
Fproj32(FBFR32 *fbfr, FLDID32 *fieldid)

Description

Fproj() is used to update a buffer so as to keep only the desired fields. fbfr is a pointer to a fielded buffer. The desired fields are specified in an array of field identifiers pointed to by fieldid. The last entry in the array must be BADFLDID. The update is done in place; fields that are not in the result of the projection are deleted from the fielded buffer. The array of field identifiers may be rearranged. (If they are not already in numeric order, they are sorted.) If updating buffers results in the removal of a FLD_PTR field, the memory area referenced by the pointer is not modified or freed.

Fproj32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fproj() or Fproj32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fproj() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

Example

#include "fld.tbl.h" 
FBFR *fbfr;
FLDID fieldid[20];
...
fieldid[0] = A; /* field ID for field A */
fieldid[1] = D; /* field ID for field D */
fieldid[2] = BADFLDID; /* sentinel value */
...
if(Fproj(fbfr, fieldid) 0)
F_error("pgm_name");

If the buffer has fields A, B, C, and D, the example results in a buffer that contains only occurrences of fields A and D. The entries in the array of field identifiers do not need to be in any specific order, but the last value in the array of field identifiers must be field identifier 0 (BADFLDID).

See Also

Introduction to FML Functions, Fjoin, Fjoin32(3fml), Fojoin, Fojoin32(3fml), Fprojcpy, Fprojcpy32(3fml)

 


Fprojcpy, Fprojcpy32(3fml)

Name

Fprojcpy(), Fprojcpy32() - projection and copy on buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fprojcpy(FBFR *dest, FBFR *src, FLDID *fieldid)

#include "fml32.h"

int
Fprojcpy32(FBFR32 *dest, FBFR32 *src, FLDID32 *fieldid)

Description

Fprojcpy() is similar to Fproj() but the projection is done into a destination buffer instead of in-place. dest and src are pointers to the destination and source fielded buffers respectively. fieldid is a pointer to an array of field identifiers. Any fields in the destination buffer are first deleted and the results of the projection on the source buffer are put into the destination buffer. The source buffer is not changed. The array of field identifiers may be rearranged. (If they are not already in numeric order, they are sorted.) If updating buffers results in the removal of a FLD_PTR field, the memory area referenced by the pointer is not modified or freed.

This function can fail for lack of space; it can be reissued after allocating enough additional space to complete the operation.

Fprojcpy32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fprojcpy() or Fprojcpy32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fprojcpy() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
Either the source buffer or the destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be copied to the destination fielded buffer but there is not enough space remaining in the buffer.

See Also

Introduction to FML Functions, Fjoin, Fjoin32(3fml), Fojoin, Fojoin32(3fml), Fproj, Fproj32(3fml)

 


Fread, Fread32(3fml)

Name

Fread(), Fread32() - read fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fread(FBFR *fbfr, FILE *iop)

#include "fml32.h"

int
Fread32(FBFR32 *fbfr, FILE32 *iop)

Description

Fielded buffers may be read from file streams using Fread(). fbfr is a pointer to a fielded buffer. iop is a pointer of type FILE to the input stream. (See stdio(3S) in a UNIX system reference manual for a discussion of streams). Fread() reads the fielded buffer from the stream into fbfr, clearing any data previously stored in the buffer, and recreates the buffer’s index. Fread32() ignores the FLD_PTR field type. No error is returned if a value of type FLD_PTR is supplied to the function.

Fread32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fread() or Fread32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fread() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit(). This error is also returned if the data that is read is not a fielded buffer.

[FNOSPACE]

"no space in fielded buffer"
There is not enough space in the buffer to hold the fielded buffer being read from the stream.

[FEUNIX]

"UNIX system call error"
The read() system call failed. The external integer errno should have been set to indicate the error by the system call.

Portability

This function is not supported using the Oracle Tuxedo System Workstation DLL for Windows.

See Also

Introduction to FML Functions, Findex, Findex32(3fml), Fwrite, Fwrite32(3fml)

stdio(3S) in a UNIX system reference manual

 


Frealloc, Frealloc32(3fml)

Name

Frealloc(), Frealloc32() - reallocate fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

FBFR *
Frealloc(FBFR *fbfr, FLDOCC nf, FLDLEN nv)

#include "fml32.h"

FBFR32 *
Frealloc32(FBFR32 *fbfr, FLDOCC32 nf, FLDLEN32 nv)

Description

Frealloc() can be used to reallocate space to enlarge a fielded buffer. fbfr is a pointer to a fielded buffer. The second and third parameters are the new number of fields, nf, and the new number of bytes value space, nv. These are not increments.

Frealloc32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Frealloc() or Frealloc32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, Frealloc() returns a pointer to the reallocated FBFR.

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Frealloc() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, number of fields is less than 0, V is 0 or total size is greater than 65534).

[FMALLOC]

"malloc failed"
The new size is smaller than what is currently in the buffer, or allocation of space dynamically using realloc() failed.

See Also

Introduction to FML Functions, Falloc, Falloc32(3fml), Ffree, Ffree32(3fml)

 


Frstrindex, Frstrindex32(3fml)

Name

Frstrindex(), Frstrindex32() - restore index in a buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Frstrindex(FBFR *fbfr, FLDOCC numidx)

#include "fml32.h"

int
Frstrindex32(FBFR32 *fbfr, FLDOCC32 numidx)

Description

A fielded buffer that has been unindexed may be reindexed by either calling Findex() or Frstrindx(). fbfr is a pointer to a fielded buffer. The former performs a total index calculation on the buffer, and is fairly expensive (requiring a full scan of the buffer). It should be used when an unindexed buffer has been altered, or the previous state of the buffer is unknown (for example, when it has been sent from one process to another without an index). Frstrindex() is much faster, but may only be used if the buffer has not been altered since its previous unindexing operation. The second argument to Frstrindx(), numidx, is the return from the Funindex() function.

Frstrindex32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Frstrindex() or Frstrindex32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Frstrindex() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

Example

In order to transmit a buffer without its index, something like the following should be performed:

save = Funindex(fbfr); 
num_to_send = Fused(fbfr);
transmit(fbfr,num_to_send); /* A hypothetical function */ Frstrindx(fbfr,save);

These four statements do the following:

1. - /* unindex, saving for Frstrindx */ 
2. - /* determine number of bytes to send */
3. - /* send fbfr, without index */
4. - /* restore index */

In this case, transmit() is passed a memory pointer and a length. The data to be transmitted begins at the memory pointer and has num_to_send number of significant bytes. Once the buffer has been sent, its index may be restored (assuming transmit() does not alter it in any way) using Frstrindex(). On the receiving end of the transmission, the process accepting the fielded buffer would index it with Findex(), as in:

receive(fbfr); /* get fbfr from wherever .. into fbfr */ 
Findex(fbfr); /* index it */

The receiving process cannot call Frstrindx() because:

  1. It did not call Funindex() and so has no idea of what the value of the numidx argument to Frstrindex() should be.
  2. The index itself is not available because it was not sent.

The solution is to call Findex() explicitly. Of course, the user is always free to transmit the indexed versions of a fielded buffer (that is, send Fsizeof(*fbfr) bytes) and avoid the cost of Findex() on the receiving side.

See Also

Introduction to FML Functions, Findex, Findex32(3fml), Fsizeof, Fsizeof32(3fml), Funindex, Funindex32(3fml)

 


Fsizeof, Fsizeof32(3fml)

Name

Fsizeof(), Fsizeof32() - return size of fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

long
Fsizeof(FBFR *fbfr)

#include "fml32.h"

long
Fsizeof32(FBFR32 *fbfr)

Description

Fsizeof() returns the size of a fielded buffer in bytes. fbfr is a pointer to a fielded buffer.

Fsizeof32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fsizeof() or Fsizeof32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fsizeof() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Fidxused, Fidxused32(3fml), Fused, Fused32(3fml), Funused, Funused32(3fml)

 


Fstrerror, Fstrerror32(3fml)

Name

Fstrerror(), Fstrerror32() - get error message string for FML error

Synopsis

#include <fml.h> 

char *
Fstrerror(int err)

#include <fml32.h>

char *
Fstrerror32(int err)

Description

Fstrerror() is used to retrieve the text of an error message from LIBFML_CAT. err is the error code set in F_error when a FML function call returns a -1 or other failure value.

The user can use the pointer returned by Fstrerror() as an argument to userlog() or F_error.

Fstrerror32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fstrerror() or Fstrerror32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

If err is an invalid error code, Fstrerror() returns a NULL. On success, the function returns a pointer to a string that contains the error message text.

Errors

Fstrerror() returns a NULL on error, but does not set F_error.

See Also

Introduction to FML Functions, tpstrerror(3c), userlog(3c), F_error, F_error32(3fml)

 


Ftypcvt, Ftypcvt32(3fml)

Name

Ftypcvt(), Ftypcvt32() - convert from one field type to another

Synopsis

#include <stdio.h> 
#include "fml.h"

char *
Ftypcvt(FLDLEN *tolen, int totype, char *fromval, int fromtype,
FLDLEN fromlen)

#include "fml32.h"

char *
Ftypcvt32(FLDLEN32 *tolen, int totype, char *fromval, int fromtype,
FLDLEN32 fromlen)

Description

Ftypcvt() converts the value *fromval, which has type fromtype, and length fromlen (if fromtype is FLD_CARRAY; otherwise, fromlen is inferred from fromtype), to a value of type totype. Ftypcvt() returns a pointer to the converted value, and sets *tolen to the converted length, upon success. Upon failure, Ftypcvt() returns NULL.

Ftypcvt32() fails if any of the following field types is used: FLD_PTR, FLD_MBSTRING, FLD_FML32, or FLD_VIEW32. If one of these field types is encountered, Ferror is set to FEBADOP.

Ftypcvt32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ftypcvt() or Ftypcvt32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ftypcvt() fails and sets Ferror to:

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) to string.

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, a NULL tolen or fromval parameter was specified).

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
An invalid field type (such as FLD_PTR, FLD_FML32, or FLD_VIEW32) is specified.

See Also

Introduction to FML Functions, CFadd, CFadd32(3fml), CFchg, CFchg32(3fml), CFfind, CFfind32(3fml), CFget, CFget32(3fml), CFgetalloc, CFgetalloc32(3fml)

 


Ftype, Ftype32(3fml)

Name

Ftype(), Ftype32() - return pointer to type of field

Synopsis

#include <stdio.h> 
#include "fml.h"

char *
Ftype(FLDID fieldid)

#include "fml32.h"

char *
Ftype32(FLDID32 fieldid)

Description

Ftype() returns a pointer to a string containing the name of the type of a field, given a field identifier, fieldid. For example, if the FLDID of a field of type short is supplied to Ftype(), a pointer is returned to the string “short.” This data area is “read-only.”

Ftype32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Ftype() or Ftype32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

On success, Ftype() returns a pointer to a character string that identifies the field type.

This function returns NULL on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Ftype() fails and sets Ferror to:

[FTYPERR]

"invalid field type"
A field identifier is specified which is not valid.

See Also

Introduction to FML Functions, Fldid, Fldid32(3fml), Fldno, Fldno32(3fml)

 


Funindex, Funindex32(3fml)

Name

Funindex(), Funindex32() - discard fielded buffer’s index

Synopsis

#include <stdio.h> 
#include "fml.h"

FLDOCC
Funindex(FBFR *fbfr)

#include "fml32.h"

FLDOCC32
Funindex32(FBFR32 *fbfr)

Description

Funindex() discards a fielded buffer’s index. fbfr is a pointer to a fielded buffer. When the function returns successfully, the buffer is unindexed. As a result, none of the buffer’s space is allocated to an index and more space is available to user fields (at the cost of potentially slower access time). Unindexing a buffer is useful when it is to be stored on disk or to be transmitted somewhere. In the first case disk space is conserved, in the second, transmission costs may be reduced.

The number of significant bytes from the buffer start, after a buffer has been unindexed is determined by the function call: Fused(fbfr)

Funindex32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Funindex() or Funindex32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

Funindex() returns the number of index elements the buffer has before the index is stripped.

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Funindex() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Findex, Findex32(3fml), Frstrindex, Frstrindex32(3fml), Fsizeof, Fsizeof32(3fml), Funused, Funused32(3fml)

 


Funused, Funused32(3fml)

Name

Funused(), Funused32() - return number of unused bytes in fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

long
Funused(FBFR *fbfr)

#include "fml32.h"

long
Funused32(FBFR32 *fbfr)

Description

Funused() returns the amount of space currently unused in the buffer. Space is unused if it contains neither user data nor overhead data such as the header and index.

fbfr is a pointer to a fielded buffer.

Funused32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Funused() or Funused32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Funused() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Fidxused, Fidxused32(3fml), Fused, Fused32(3fml)

 


Fupdate, Fupdate32(3fml)

Name

Fupdate(), Fupdate32() - update destination buffer with source

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fupdate(FBFR *dest, FBFR *src)

#include "fml32.h"

int
Fupdate32(FBFR32 *dest, FBFR32 *src)

Description

Fupdate() updates the destination buffer with the field values in the source buffer. dest and src are pointers to fielded buffers. For fields that match on fieldid/occurrence, the field value is updated in the destination buffer with the value in the source buffer. Fields in the destination buffer that have no corresponding field in the source buffer are left untouched. Fields in the source buffer that have no corresponding field in the destination buffer are added to the destination buffer.

For values of type FLD_PTR, Fupdate32() stores the pointer value. The buffer pointed to by a FLD_PTR field must be allocated using the tpalloc() call. For values of type FLD_FML32, Fupdate32() stores the entire FLD_FML32 field value, except the index. For values of type FLD_VIEW32, Fupdate32() stores a pointer to a structure of type FVIEWFLD, which contains vflags (a flags field, currently unused and set to 0), vname (a character array containing the viewname), and data (a pointer to the view data stored as a C structure). The application provides the vname and data to Fupdate32().

Fupdate32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fupdate() or Fupdate32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fupdate() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
Either the source buffer or the destination buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The source or destination buffer is not a fielded buffer or has not been initialized by Finit().

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in the destination buffer but there is not enough space remaining in the buffer.

See Also

Introduction to FML Functions, Fjoin, Fjoin32(3fml), Fojoin, Fojoin32(3fml), Fproj, Fproj32(3fml), Fprojcpy, Fprojcpy32(3fml)

 


Fused, Fused32(3fml)

Name

Fused(), Fused32() - return number of used bytes in fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

long
Fused(FBFR *fbfr)

#include "fml32.h"

long
Fused32(FBFR32 *fbfr)

Description

Fused() returns the amount of used space in a fielded buffer in bytes, including both user data and the header (but not the index, which can be dropped at any time). fbfr is a pointer to a fielded buffer.

Fused32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fused() or Fused32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fused() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

See Also

Introduction to FML Functions, Fidxused, Fidxused32(3fml), Funused, Funused32(3fml)

 


Fvall, Fvall32(3fml)

Name

Fvall(), Fvall32() - return long value of field occurrence

#include <stdio.h> 
#include "fml.h"

long
Fvall(FBFR *fbfr, FLDID fieldid, FLDOCC oc)

#include "fml32.h"

long
Fvall32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc)

Description

Fvall() works like Ffind() for long and short values, but returns the actual value of the field as a long, instead of a pointer to the value. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field.

If the specified field occurrence is not found, then 0 is returned. This function is useful for passing the value of a field to another function without checking the return value. This function is valid only for fields of type FLD_LONG or FLD_SHORT.

Fvall32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fvall() or Fvall32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

For fields of types other than FLD_LONG or FLD_SHORT, Fvall() returns 0 and sets Ferror to FTYPERR.

This function returns 0 on other errors and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvall() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
Bad fieldid or the field type is not FLD_SHORT or FLD_LONG.

See Also

Introduction to FML Functions, Ffind, Ffind32(3fml), Fvals, Fvals32(3fml)

 


Fvals, Fvals32(3fml)

Name

Fvals(), Fvals32() - return string value of field occurrence

Synopsis

#include <stdio.h> 
#include "fml.h"

char *
Fvals(FBFR *fbfr, FLDID fieldid, FLDOCC oc)

#include "fml32.h"

char *
Fvals32(FBFR32 *fbfr, FLDID32 fieldid, FLDOCC32 oc)

Description

Fvals() works like Ffind() for string values but guarantees that a value is returned. fbfr is a pointer to a fielded buffer. fieldid is a field identifier. oc is the occurrence number of the field.

If the specified field occurrence is not found, then the NULL string is returned. This function is useful for passing the value of a field to another function without checking the return value. This function is valid only for fields of type FLD_STRING; the NULL string is automatically returned for other field types (that is, no conversion is done).

Fvals32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fvals() or Fvals32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns the NULL string on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvals() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FBADFLD]

"unknown field number or type"
A field identifier is specified which is not valid.

[FTYPERR]

"invalid field type"
Bad fieldid or the field type is not FLD_STRING.

See Also

Introduction to FML Functions, CFfind, CFfind32(3fml), Ffind, Ffind32(3fml), Fvall, Fvall32(3fml)

 


Fvftos, Fvftos32(3fml)

Name

Fvftos(), Fvftos32() - copy from fielded buffer to C structure

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fvftos(FBFR *fbfr, char *cstruct, char *view)

#include "fml32.h"

int
Fvftos32(FBFR32 *fbfr, char *cstruct, char *view)

Description

The Fvftos() function transfers data from a fielded buffer to a C structure. fbfr is a pointer to a fielded buffer. cstruct is a pointer to a C structure. view is a pointer to the name of a compiled view description.

Fields are copied from the fielded buffer into the structure based on the member descriptions in the view. If a field in the fielded buffer has no corresponding member in the C structure, it is ignored. If a member specified in the C structure has no corresponding field in the fielded buffer, a NULL value is copied into the member. The NULL value used is definable for each member in the view description.

To store multiple occurrences in the C structure, the structure member should be an array (for example, int zip[4] can store 4 occurrences of zip). If the buffer has fewer occurrences of the field than there are elements in the array, the extra element slots are assigned NULL values. On the other hand, if the buffer has more occurrences of the field than there are elements in the array, the surplus occurrences are ignored.

There are view description options that inhibit mappings even though a mapping entry exists for a field identifier and a member. These options are initially specified in the viewfile, but can be changed at run time using Fvopt().

Fvftos32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fvftos() or Fvftos32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvftos() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid, (for example, specifying a NULL cstruct parameter to Fvftos).

[FBADACM]

"ACM contains negative value"
An Associated Count Member should not be a negative value while transferring data from a structure to a fielded buffer.

[FBADVIEW]

"cannot find or get view"
The view description specified was NULL or was not found in the files specified by VIEWDIR or VIEWFILES.

See Also

Introduction to FML Functions, Fvopt, Fvopt32(3fml), viewfile(5)

 


Fvneeded, Fvneeded32(3fml)

Name

Fvneeded(), Fvneeded32() - computes size needed for VIEW buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

long
Fvneeded(char *subtype)

#include "fml32.h"

long
Fvneeded32(char *subtype)

Description

Fvneeded() returns the size of the VIEW C structure. subtype is the name of the VIEW. You can call Fvneeded() to determine the size of a VIEW buffer to allocate. Fvneeded32() is used with 32-bit VIEWs.

Return Values

Fvneeded() returns the size of the VIEW in number of bytes. This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvnull() fails and sets Ferror to:

[FEINVAL]

"invalid argument to function"
The requested VIEW cannot be found in the viewfiles specified by VIEWDIR and VIEWFILES environment variables.

See Also

Introduction to FML Functions, viewfile(5)

 


Fvnull, Fvnull32(3fml)

Name

Fvnull(), Fvnull32() - check if a structure element is NULL

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fvnull(char *cstruct, char *cname, FLDOCC oc, char *view)

#include "fml32.h"

int
Fvnull32(char *cstruct, char *cname, FLDOCC32 oc, char *view)

Description

Fvnull() is used to determine if an occurrence of a structure element is NULL. cstruct is a pointer to a C structure. cname is a pointer to the name of an element within cstruct. oc is the occurrence number of the element. view is a pointer to the name of a compiled view description.

Options of Fvopt() such as do not affect this function.

Fvnull32() is used for views defined with viewc32 or VIEW32 typed buffers for larger views with more fields.

A thread in a multithreaded application may issue a call to Fvnull() or Fvnull32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

Fvnull() returns 1, if the specified cname in a C structure is NULL and returns 0 if not NULL. This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvnull() fails and sets Ferror to:

[FBADVIEW]

"cannot find or get view"
The view description specified was not found in the files specified by VIEWDIR or VIEWFILES.

[FNOCNAME]

"cname not found"
The C structure field name is not found in the view description.

See Also

Introduction to FML Functions, Fvopt, Fvopt32(3fml), viewfile(5)

 


Fvopt, Fvopt32(3fml)

Name

Fvopt(), Fvopt32() - change flag options of a mapping entry

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fvopt(char *cname, int option, char *view)

#include "fml32.h"

int
Fvopt32(char *cname, int option, char *view)

Description

Fvopt() allows users to specify buffer-to-structure mapping options at run time. cname is a pointer to the name of an element in a view description, view. option specifies the desired setting for the mapping option. Valid options and their meanings are:

F_FTOS

One-way mapping from fielded buffer to structure, flag S in the view description.

F_STOF

One-way mapping from structure to fielded buffer, flag F in the view description.

F_OFF

No mapping between the fielded buffer and the structure, flag N in the view description.

F_BOTH

Two-way mapping between the fielded buffer and the structure, flag S, F in the view description.

Fvopt32() is used for views defined with viewc32 or VIEW32 typed buffers for larger views with more fields.

A thread in a multithreaded application may issue a call to Fvopt() or Fvopt32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvopt() fails and sets Ferror to:

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, specifying a NULL cname or view parameter or specifying an invalid option).

[FBADVIEW]

"cannot find or get view"
The view was not found in the files specified by VIEWDIR and VIEWFILES.

[FNOCNAME]

"cname not found"
The C structure field name is not found in the view description.

See Also

Introduction to FML Functions, viewfile(5)

 


Fvrefresh, Fvrefresh32(3fml)

Name

Fvrefresh(), Fvrefresh32() - copy from C structure to fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

void
Fvrefresh()

#include "fml32.h"

void
Fvrefresh32()

Description

Fvrefresh() clears and reinitializes the internal cache of view structure mappings. This is necessary only when frequently accessed views are updated dynamically.

Fvrefresh32() is used for views defined with viewc32 or VIEW32 typed buffers for larger views with more fields.

A thread in a multithreaded application may issue a call to Fvrefresh() or Fvrefresh32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This routine is a void function and does not return a value.

Errors

This routine is a void function and no error codes are set.

See Also

Introduction to FML Functions

 


Fvselinit, Fvselinit32(3fml)

Name

Fvselinit(), Fvselinit32() - initialize structure element to NULL

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fvselinit(char *cstruct, char *cname, char *view)

#include "fml32.h"

int
Fvselinit32(char *cstruct, char *cname, char *view)

Description

Fvselinit() initializes an individual element of a C structure to its appropriate NULL value. cstruct is a pointer to a C structure. cname is a pointer to the name of an element of cstruct. view is a pointer to the name of a compiled view description.

Fvselinit() sets the associated count member of the element to 0 if the C flag was used when the view was compiled, and sets the associated length member to the length of the associated NULL value if the L flag was used in the viewfile.

Fvselinit32() is used for views defined with viewc32 or VIEW32 typed buffers for larger views with more fields.

A thread in a multithreaded application may issue a call to Fvselinit() or Fvselinit32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvselinit() fails and sets Ferror to:

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, specifying a NULL cstruct parameter invalid Fvselinit).

[FBADVIEW]

"cannot find or get view"
The view description specified was NULL or was not found in the files specified by VIEWDIR or VIEWFILES.

[FNOCNAME]

"cname not found"
The C structure field name is not found in the view description.

See Also

Introduction to FML Functions, Fvsinit, Fvsinit32(3fml), viewfile(5)

 


Fvsinit, Fvsinit32(3fml)

Name

Fvsinit(), Fvsinit32() - initialize C structure to NULL

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fvsinit(char *cstruct, char *view)

#include "fml32.h"

int
Fvsinit32(char *cstruct, char *view)

Description

Fvsinit() initializes all members in a C structure to the NULL values specified in the view description, view. cstruct is a pointer to a C structure. view is a pointer to a compiled view description.

Fvsinit() sets the associated count member of an element to 0 if the C flag was used when the view was compiled, and sets the associated length member to the length of the associated NULL value if the L flag was used in the viewfile.

Fvsinit32() is used for views defined with viewc32 or VIEW32 typed buffers for larger views with more fields.

A thread in a multithreaded application may issue a call to Fvsinit() or Fvsinit32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvsinit() fails and sets Ferror to:

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, specifying a NULL cstruct parameter invalid Fvsinit()).

[FBADVIEW]

"cannot find or get view"
The view description specified was NULL or was not found in the files specified by VIEWDIR or VIEWFILES.

See Also

Introduction to FML Functions, Fvselinit, Fvselinit32(3fml), viewfile(5)

 


Fvstof, Fvstof32(3fml)

Name

Fvstof(), Fvstof32() - copy from C structure to fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fvstof(FBFR *fbfr, char *cstruct, int mode, char *view)

#include "fml32.h"

int
Fvstof32(FBFR32 *fbfr, char *cstruct, int mode, char *view)

Description

Fvstof() transfers data from a C structure to a fielded buffer. fbfr is a pointer to a fielded buffer. cstruct is a pointer to a C structure. mode specifies the manner in which the transfer is made. view is a pointer to a compiled view description. mode has four possible values:

The action of these modes are the same as that described in Fupdate(), Fojoin(), Fjoin(), and Fconcat(). One can even think of Fvstof() as the same as these functions, except that where they specify a source buffer, Fvstof() specifies a C structure. Bear in mind that FUPDATE does not move structure elements that have NULL values.

Fvstof32() is used for views defined with viewc32 or VIEW32 typed buffers for larger views with more fields.

A thread in a multithreaded application may issue a call to Fvstof() or Fvstof32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fvstof() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, specifying a NULL cstruct parameter or an invalid mode to Fvstof())

[FNOSPACE]

"no space in fielded buffer"
A field value is to be added or changed in a fielded buffer but there is not enough space remaining in the buffer.

[FBADACM]

"ACM contains negative value"
An Associated Count Member should not be a negative value while transferring data from a structure to a fielded buffer.

[FMALLOC]

"malloc failed"
Allocation of space dynamically using malloc() failed when converting from a carray (or mbstring) or string value.

See Also

Introduction to FML Functions, Fconcat, Fconcat32(3fml), Fjoin, Fjoin32(3fml), Fojoin, Fojoin32(3fml), Fupdate, Fupdate32(3fml), Fvftos, Fvftos32(3fml)

 


Fvstot, Fvttos(3fml)

Name

Fvstot(), Fvttos() - convert C structure to/from target record type

Synopsis

#include <stdio.h> 
#include "fml.h"

long
Fvstot(char *cstruct, char *trecord, long treclen, char *viewname)

long
Fvttos(char *cstruct, char *trecord, char *viewname)

#include "fml32.h"

int
Fvstot32(char *cstruct, char *trecord, long treclen, char *viewname)

int
Fvttos32(char *cstruct, char *trecord, char *viewname)

int Fcodeset(char *translation_table)

Description

The Fvstot() function transfers data from a C structure to a target record type. The Fvttos() function transfers data from a target record to a C structure. trecord is a pointer to the target record. cstruct is a pointer to a C structure. viewname is a pointer to the name of a compiled view description. The VIEWDIR and VIEWFILES are used to find the directory and file containing the compiled view description.

Fvttos32() and Fvstot32() are used with 32-bit VIEWS.

To convert from an FML buffer to a target record, first call Fvftos() to convert the FML buffer to a C structure, and call Fvstot() to convert to a target record. To convert from a target record to an FML buffer, first call Fvttos() to convert to a C structure and then call Fvstof() to convert the structure to an FML buffer.

A thread in a multithreaded application may issue a call to Fvstot() or Fvttos() while running in any context state, including TPINVALIDCONTEXT.

Default Conversion-IBM/370

The default target is IBM/370 COBOL records. The default data conversion is done based on the following table.

Table 2 Default Data Conversion
Struct
Record
float
COMP-1
double
COMP-2
long
S9(9) COMP
short
S9(4) COMP
int
S9(9) COMP or S9(4) COMP
dec_t(m, n)
S9(2*m-(n+1))V9(n)COMP-3
ASCII char
EBCDIC char
ASCII string
EBCDIC string
carray
character array
mbstring
multibyte character array

No filler bytes are provided between fields in the IBM/370 record. The COBOL SYNC clause should not be specified for any data items that are a part of the structure corresponding to the view.

An integer field is converted to either a four or two-byte integer depending on the size of integers on the machine on which the conversion is done.

A string field in the view must be terminated with a NULL when converting to/from the IBM/370 format.

The data in a carray or mbstring field is passed unchanged; no data translation is performed.

Packed decimals exist in the IBM/370 environment as two decimal digits packed into one byte with the low-order half byte used to store the sign. The length of a packed decimal may be 1 to 16 bytes with storage available for 1 to 31 digits and a sign.

Packed decimals are supported in C structures using the dec_t field type. The dec_t field has a defined size consisting of two numbers separated by a comma. The number to the left of the comma is the total number of bytes that the decimal occupies. The number to the right is the number of digits to the right of the decimal point. The formula for conversion is:

dec_t(m, n) => S9(2*m-(n+1))V9(n)COMP-3

Decimal values may be converted to and from other data types (for example, int, long, string, double, and float) using the functions described in decimal().

The following table provides the hex values for default character conversion of ASCII (on the left) to/from EBCDIC (on the right).

| 00 00 |01 01 |02 02 |03 03 |04 37 |05 2d |06 2e |07 2f |
| 08 16 |09 05 |0a 25 |0b 0b |0c 0c |0d 0d |0e 0e |0f 0f |
| 10 10 |11 11 |12 12 |13 13 |14 3c |15 3d |16 32 |17 26 |
| 18 18 |19 19 |1a 3f |1b 27 |1c 1c |1d 1d |1e 1e |1f 1f |
| 20 40 |21 5a |22 7f |23 7b |24 5b |25 6c |26 50 |27 7d |
| 28 4d |29 5d |2a 5c |2b 4e |2c 6b |2d 60 |2e 4b |2f 61 |
| 30 f0 |31 f1 |32 f2 |33 f3 |34 f4 |35 f5 |36 f6 |37 f7 |
| 38 f8 |39 f9 |3a 7a |3b 5e |3c 4c |3d 7e |3e 6e |3f 6f |
| 40 7c |41 c1 |42 c2 |43 c3 |44 c4 |45 c5 |46 c6 |47 c7 |
| 48 c8 |49 c9 |4a d1 |4b d2 |4c d3 |4d d4 |4e d5 |4f d6 |
| 50 d7 |51 d8 |52 d9 |53 e2 |54 e3 |55 e4 |56 e5 |57 e6 |
| 58 e7 |59 e8 |5a e9 |5b ad |5c e0 |5d bd |5e 5f |5f 6d |
| 60 79 |61 81 |62 82 |63 83 |64 84 |65 85 |66 86 |67 87 |
| 68 88 |69 89 |6a 91 |6b 92 |6c 93 |6d 94 |6e 95 |6f 96 |
| 70 97 |71 98 |72 99 |73 a2 |74 a3 |75 a4 |76 a5 |77 a6 |
| 78 a7 |79 a8 |7a a9 |7b c0 |7c 6a |7d d0 |7e a1 |7f 07 |
| 80 20 |81 21 |82 22 |83 23 |84 24 |85 15 |86 06 |87 17 |
| 88 28 |89 29 |8a 2a |8b 2b |8c 2c |8d 09 |8e 0a |8f 1b |
| 90 30 |91 31 |92 1a |93 33 |94 34 |95 35 |96 36 |97 08 |
| 98 38 |99 39 |9a 3a |9b 3b |9c 04 |9d 14 |9e 3e |9f e1 |
| a0 41 |a1 42 |a2 43 |a3 44 |a4 45 |a5 46 |a6 47 |a7 48 |
| a8 49 |a9 51 |aa 52 |ab 53 |ac 54 |ad 55 |ae 56 |af 57 |
| b0 58 |b1 59 |b2 62 |b3 63 |b4 64 |b5 65 |b6 66 |b7 67 |
| b8 68 |b9 69 |ba 70 |bb 71 |bc 72 |bd 73 |be 74 |bf 75 |
| c0 76 |c1 77 |c2 78 |c3 80 |c4 8a |c5 8b |c6 8c |c7 8d |
| c8 8e |c9 8f |ca 90 |cb 9a |cc 9b |cd 9c |ce 9d |cf 9e |
| d0 9f |d1 a0 |d2 aa |d3 ab |d4 ac |d5 4a |d6 ae |d7 af |
| d8 b0 |d9 b1 |da b2 |db b3 |dc b4 |dd b5 |de b6 |df b7 |
| e0 b8 |e1 b9 |e2 ba |e3 bb |e4 bc |e5 4f |e6 be |e7 bf |
| e8 ca |e9 cb |ea cc |eb cd |ec ce |ed cf |ee da |ef db |
| f0 dc |f1 dd |f2 de |f3 df |f4 ea |f5 eb |f6 ec |f7 ed |
| f8 ee |f9 ef |fa fa |fb fb |fc fc |fd fd |fe fe |ff ff |

An alternate character translation table can be used at run time by calling Fcodeset(). The translation_table must point to 512 bytes of binary data. The first 256 bytes of data are interpreted as the ASCII to EBCDIC translation table. The second 256 bytes of data are interpreted as the EBCDIC to ASCII table. Any data after the 512th byte is ignored. If the pointer is NULL, the default translation is used.

Return Values

On success, Fvstot() returns the length of the target record and Fvttos() returns the length of the C structure.

These functions return -1 on error and set Ferror to indicate the error condition.

Errors

Under the following conditions, Fvttos() fails and sets Ferror to:

[FEINVAL]

"invalid argument to function"
One of the arguments to the function invoked was invalid (for example, specifying a NULL trecord or cstruct parameter to Fvttos()). This error is also returned if a value is out of range when converting to or from a target record.

[FBADACM]

"ACM contains negative value"
An Associated Count Member cannot be a negative value.

[FBADVIEW]

"cannot find or get view"
viewname was not found in the files specified by VIEWDIR or VIEWFILES.

[FNOSPACE]

"no space in buffer"
The target record is not large enough to hold the converted structure.

[FVFOPEN]

"cannot find or open viewfile"
While trying to find viewname, the program failed to find one of the files specified by VIEWDIR or VIEWFILES.

[FEUNIX]

"operating system error"
While trying to find viewname, the program failed to open one of the files specified by VIEWDIR or VIEWFILES for reading.

[FVFSYNTAX]

"bad viewfile"
While trying to find viewname, one of the files specified by VIEWDIR or VIEWFILES was corrupted or not a viewfile.

[FMALLOC]

"malloc failed"
While trying to find viewname, malloc() failed while allocating space to hold the view information.

Example

VIEW test.v 

VIEW test
#type cname fbname count flag size null
float float1 FLOAT1 1 - - 0.0
double double1 DOUBLE1 1 - - 0.0
long long1 LONG1 1 - - 0
short short1 SHORT1 1 - - 0
int int1 INT1 1 - - 0
dec_t dec1 DEC1 1 - 4,2 0
char char1 CHAR1 1 - - ''
string string1 STRING1 1 - 20 ''
carray carray1 CARRAY1 1 - 20 ''
END

Equivalent COBOL Record

02 OUTPUT-REC.
05 FLOAT1 USAGE IS COMP-1.
05 DOUBLE1 USAGE IS COMP-2.
05 LONG1 PIC S9(9) USAGE IS COMP.
05 SHORT1 PIC S9(4) USAGE IS COMP.
05 INT1 PIC S9(9) USAGE IS COMP.
05 DEC1 PIC S9(5)V9(2) COMP-3.
05 CHAR1 PIC X(01).
05 STRING1 PIC X(20).
05 CARRAY1 PIC X(20).

C Program

#include "test.h"
#include "decimal.h"

main()
{

struct test s1;
char data[100];

s1.float1 = 1.0;
s1.double1 = 2.0;
s1.long1 = 3;
s1.short1 = 4;
s1.int1 = 5;
deccvdbl(6.0,s1.dec1);
s1.char1 = '7';
(void) strcpy(s1.string1, "eight");
(void) strcpy(s1.carray1, "nine");

if (Fvstot((char *)&s1, data, reclen, "test") == -1) {
printf("Fvstot failed: %sn", Fstrerror(Ferror));
exit(0);
}
/* transfer to target machine and get response */
...

/* translate back */
if (Fvttos(data, (char *)&s1, "test") == -1) {
printf("Fvttos failed: %sn", Fstrerror(Ferror));
exit(0);
}

/* use the structure */
.....
exit(0);
}

See Also

Introduction to FML Functions, Fvftos, Fvftos32(3fml), Fvstof, Fvstof32(3fml), viewfile(5)

decimal(3) in a UNIX system reference manual

 


Fwrite, Fwrite32(3fml)

Name

Fwrite(), Fwrite32() - write fielded buffer

Synopsis

#include <stdio.h> 
#include "fml.h"

int
Fwrite(FBFR *fbfr, FILE *iop)

#include "fml32.h"

int
Fwrite32(FBFR32 *fbfr, FILE *iop)

Description

Fielded buffers may be written to streams by Fwrite(). (See stdio(3S) in a UNIX system reference manual for a discussion of streams). Fwrite() discards a buffer’s index.

fbfr is a pointer to a fielded buffer. iop is a pointer of type FILE to the output stream.

For the FLD_PTR field type, only the pointer, not the data being pointed to, is written to the output stream. For the FLD_VIEW32 field type, only the FVIEWFLD structure, not the data in the VIEW32 buffer, is written to the output stream.

Fwrite32() is used with 32-bit FML.

A thread in a multithreaded application may issue a call to Fwrite() or Fwrite32() while running in any context state, including TPINVALIDCONTEXT.

Return Values

This function returns -1 on error and sets Ferror to indicate the error condition.

Errors

Under the following conditions, Fwrite() fails and sets Ferror to:

[FALIGNERR]

"fielded buffer not aligned"
The buffer does not begin on the proper boundary.

[FNOTFLD]

"buffer not fielded"
The buffer is not a fielded buffer or has not been initialized by Finit().

[FEUNIX]

"UNIX system call error"
The write system call failed. The external integer errno should have been set to indicate the error by the system call, and the external integer Uunixerr (values defined in Uunix.h) is set to the system call that returned the error.

Portability

This function is not supported using the Oracle Tuxedo System Workstation DLL for Windows.

See Also

Introduction to FML Functions, Findex, Findex32(3fml), Fread, Fread32(3fml)

stdio(3S) in a UNIX system reference manual

 


tpconvfmb32(3fml)

Name

tpconvfmb32() - convert multibyte characters from source encoding to target encoding

Synopsis

#include <atmi.h>
#include "fml32.h"
extern int tperrno;
int
tpconvfmb32 (FBFR32 **bufp, FLDID32 *ids, char *target_encoding,
long flags)

Description

tpconvfmb32() converts the multibyte characters in an FLD_MBSTRING field in an FML32 typed buffer to a named target encoding. Specifically, tpconvfmb32() compares the source encoding name specified for the FLD_MBSTRING field with the target encoding name defined in target_encoding; if the encoding names are different, tpconvfmb32() converts the FLD_MBSTRING field data to the target encoding.

tpconvfmb32() is an alternative to system-initiated encoding conversion. System-initiated encoding conversion of FLD_MBSTRING field data is done automatically when the process TPMBACONV environment variable is set to a non-NULL value.

bufp is a pointer to an FML32 typed buffer. It is reallocated internally if the size associated with the pointer is insufficient to handle the converted output data of the FML32 buffer. bufp must be defined using the tpalloc() function, not the Falloc() function. If bufp contains FLD_FML32 fields, they are checked recursively for FLD_MBSTRING fields. If bufp contains FLD_PTR fields, they are skipped.

ids contains a pointer to an array of field ids that are to be converted. If ids is NULL, all FLD_MBSTRING fields found in bufp are converted to the target encoding if required. The array, if used, must be terminated with 0 (i.e., BADFLDID).

target_encoding is the target code-set encoding name used to convert the FLD_MBSTRING fields in the bufp message. If target_encoding is NULL, tpconvfmb32() uses the encoding name defined in the process TPMBENC environment variable.

flags is not used by tpconvfmb32(). It is passed to the buffer type switch function for user-defined conversion functions.

Return Values

On success, tpconvfmb32() returns 0. On error, tpconvfmb32() returns -1 and sets tperrno to indicate the error condition.

Errors

Under the following conditions, tpconvfmb32() fails and sets tperrno to:

[TPEPROTO]

bufp translates to a Tuxedo buffer that does not have a buffer type switch conversion function.

[TPESYSTEM]

A Tuxedo system error has occurred (e.g., bufp does not correspond to a valid Tuxedo buffer).

[TPEINVAL]

target_encoding or bufp is NULL.

[TPEOS]

An operating system error occurred. The external integer Uunixerr (values defined in Uunix.h) is set to the system call that returned the error.

See Also

Fmbpack32(3fml), Fmbunpack32(3fml), tpalloc(3c), tpsetmbenc(3c), tuxgetmbaconv(3c), tuxgetmbenc(3c), tuxsetmbaconv(3c), tuxsetmbenc(3c)

 


tpconvvmb32(3fml)

Name

tpconvvmb32() - converts the multibyte characters in an MBSTRING field in an VIEW32 typed buffer to a named target encoding

Synopsis

#include <atmi.h>
#include "fml32.h"
extern int tperrno;

int
tpconvvmb32 (char **bufp, FLDID32 *ids, char *target_encoding,
long flags)

Description

Specifically, tpconvvmb32() compares the source encoding name specified for the MBSTRING field with the target encoding name defined in target_encoding; if the encoding names are different, tpconvvmb32() converts the MBSTRING field data to the target encoding.

tpconvvmb32() is an alternative to system-initiated encoding conversion. System-initiated encoding conversion of MBSTRING field data is done automatically when the process TPMBACONV environment variable is set to a non-NULL value.

tpconvvmb32() supports the following arguments:

bufp

A pointer to an VIEW32 typed buffer. It is reallocated internally if the size associated with the pointer is insufficient to handle the converted output data of the VIEW32 buffer.
Note: bufp must be defined using the tpalloc() function, not Falloc().

ids

Contains a pointer to an array of field ids that are to be converted. If ids is NULL, all MBSTRING fields found in bufp are converted to the target encoding if required. The array, if used, must be terminated with 0 (i.e., BADFLDID).

target_encoding

The target code-set encoding name used to convert the MBSTRING fields in the bufp message. If target_encoding is NULL, tpconvvmb32() uses the encoding name defined in the process TPMBENC environment variable.

flags

Not used by tpconvvmb32(). It is passed to the buffer type switch function for user-defined conversion functions.

Return Values

On success, tpconvvmb32() returns 0. On error, tpconvvmb32() returns -1 and sets tperrno to indicate the error condition.

Errors

Under the following conditions, tpconvvmb32() fails and sets tperrno to:

[TPEPROTO]

bufp translates to a Tuxedo buffer that does not have a buffer type switch conversion function.

[TPESYSTEM]

A Tuxedo system error has occurred (e.g., bufp does not correspond to a valid Tuxedo buffer).

[TPEINVAL]

target_encoding or bufp is NULL.

[TPEOS]

An operating system error occurred. The external integer Uunixerr (values defined in Uunix.h) is set to the system call that returned the error.

See Also

Fmbpack32(3fml), Fmbunpack32(3fml), tpalloc(3c), tpsetmbenc(3c), tuxgetmbaconv(3c), tuxgetmbenc(3c), tuxsetmbaconv(3c), tuxsetmbenc(3c)


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