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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 re-arranged. (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 re-issued 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:
Either the source buffer or the destination buffer does not begin on the proper boundary.
Either the source buffer or the destination buffer is not a fielded buffer or has not been initialized by Finit().
A field value is to be copied to the destination fielded buffer but there is not enough space remaining in the buffer.
See Also
Introduction to FML Functions, Fjoin, Fjoin32(3fml), Fojoin, Fojoin32(3fml), Fproj, Fproj32(3fml)
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Copyright © 2000 BEA Systems, Inc. All rights reserved.
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