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Ftypcvt (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 is used with 32-bit FML.

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(3) failed when converting from a carray 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.

See Also

Fintro(3), CFadd(3), CFchg(3), CFget(3), CFgetalloc(3), CFfind(3)

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