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   BEA Tuxedo FML Function Reference

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

#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) 

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 view name.

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.

On success, Flen() returns the field length.

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

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.

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