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The PC-SIG Library 10
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The PC-Sig Library - Shareware for the IBM PC and Compatibles (PC-SIG)(Tenth Edition Disks 1-2804)(1991).iso
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CBRECLAS.C
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1990-06-21
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/* Copyright (c) 1989 Citadel */
/* All Rights Reserved */
/* #ident "@(#)cbreclas.c 1.4 - 90/06/20" */
/* ansi headers */
#include <errno.h>
/* library headers */
#include <lseq.h>
/* local headers */
#include "cbase_.h"
/*man---------------------------------------------------------------------------
NAME
cbreclast - last cbase record
SYNOPSIS
#include <cbase.h>
int cbreclast(cbp)
cbase_t *cbp;
DESCRIPTION
The cbreclast function positions the record cursor of cbase cbp
on the last record.
cbreclast will fail if one or more of the following is true:
[EINVAL] cbp is not a valid cbase pointer.
[CBELOCK] cbp is not locked.
[CBENOPEN] cbp is not open.
[CBENREC] cbp is empty.
SEE ALSO
cbreccnt, cbrecfirst, cbrecnext, cbrecprev.
DIAGNOSTICS
Upon successful completion, a value of 0 is returned. Otherwise,
a value of -1 is returned, and errno set to indicate the error.
------------------------------------------------------------------------------*/
int cbreclast(cbp)
cbase_t *cbp;
{
/* validate arguments */
if (!cb_valid(cbp)) {
errno = EINVAL;
return -1;
}
/* check if not open */
if (!(cbp->flags & CBOPEN)) {
errno = CBENOPEN;
return -1;
}
/* check if not locked */
if (!(cbp->flags & CBLOCKS)) {
errno = CBELOCK;
return -1;
}
/* check if cbp is empty */
if (lsreccnt(cbp->lsp) == 0) {
errno = CBENREC;
return -1;
}
/* set cursor to last record */
if (lslast(cbp->lsp) == -1) {
CBEPRINT;
return -1;
}
errno = 0;
return 0;
}