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Fdel (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(3) to set the field occurrence value to a "null" value.

Fdel32 is used with 32-bit FML.

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

Fintro(3), Fadd(3), Fchg(3), Fdelall(3), Fdelete(3)

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