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Cream of the Crop 1
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Cream of the Crop 1.iso
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PROGRAM
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CBASE102.ARJ
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CBGETRF.C
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1991-09-23
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/* Copyright (c) 1989 Citadel */
/* All Rights Reserved */
/* #ident "@(#)cbgetrf.c 1.5 - 91/09/23" */
#include <ansi.h>
/* ansi headers */
#include <errno.h>
/* library headers */
#include <blkio.h>
#include <lseq.h>
/* local headers */
#include "cbase_.h"
/*man---------------------------------------------------------------------------
NAME
cbgetrf - get cbase record field
SYNOPSIS
#include <cbase.h>
int cbgetrf(cbp, field, buf)
cbase_t *cbp;
int field;
void *buf;
DESCRIPTION
The cbgetrf function reads the specified field from the current
record of cbase cbp into buf. buf must point to a storage area
of size no less than the size of the specified field.
cbgetrf will fail if one or more of the following is true:
[EINVAL] cbp is not a valid cbase pointer.
[EINVAL] field is not a valid field number for
cbase cbp.
[EINVAL] buf is the NULL pointer.
[CBELOCK] cbp is not read locked.
[CBENOPEN] cbp is not open.
[CBENREC] The record cursor for cbp is null.
SEE ALSO
cbcursor, cbgetr, cbputrf.
DIAGNOSTICS
Upon successful completion, a value of 0 is returned. Otherwise,
a value of -1 is returned, and errno set to indicate the error.
------------------------------------------------------------------------------*/
#ifdef AC_PROTO
int cbgetrf(cbase_t *cbp, int field, void *buf)
#else
int cbgetrf(cbp, field, buf)
cbase_t *cbp;
int field;
void *buf;
#endif
{
/* validate arguments */
if (!cb_valid(cbp) || buf == NULL) {
errno = EINVAL;
return -1;
}
/* check if not open */
if (!(cbp->flags & CBOPEN)) {
errno = CBENOPEN;
return -1;
}
/* validate field argument */
if (field < 0 || field >= cbp->fldc) {
errno = EINVAL;
return -1;
}
/* check if not read locked */
if (!(cbp->flags & CBRDLCK)) {
errno = CBELOCK;
return -1;
}
/* check if cursor is null */
if (lscursor(cbp->lsp) == NULL) {
errno = CBENREC;
return -1;
}
/* read field */
if (lsgetrf(cbp->lsp, cbp->fldv[field].offset, buf, cbp->fldv[field].len) == -1) {
CBEPRINT;
return -1;
}
return 0;
}