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:

See Also