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:

See Also