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/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)snprintf.c 1.9 04/05/09 Copyright 1985, 1996-2004 J. Schilling */
/*
* Copyright (c) 1985, 1996-2004 J. Schilling
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#define snprintf __nothing__ /* prototype may be wrong (e.g. IRIX) */
#include <mconfig.h>
#include <unixstd.h> /* include <sys/types.h> try to get size_t */
#include <stdio.h> /* Try again for size_t */
#include <stdxlib.h> /* Try again for size_t */
#include <vadefs.h>
#include <standard.h>
#include <schily.h>
#undef snprintf
EXPORT int snprintf __PR((char *, size_t maxcnt, const char *, ...));
typedef struct {
char *ptr;
int count;
} *BUF, _BUF;
#ifdef PROTOTYPES
static void _cput(char c, long l)
#else
static void _cput(c, l)
char c;
long l;
#endif
{
register BUF bp = (BUF)l;
if (--bp->count > 0) {
*bp->ptr++ = c;
} else {
/*
* Make sure that there will never be a negative overflow.
*/
bp->count++;
}
}
/* VARARGS2 */
#ifdef PROTOTYPES
EXPORT int
snprintf(char *buf, size_t maxcnt, const char *form, ...)
#else
EXPORT int
snprintf(buf, maxcnt, form, va_alist)
char *buf;
unsigned maxcnt;
char *form;
va_dcl
#endif
{
va_list args;
int cnt;
_BUF bb;
bb.ptr = buf;
bb.count = maxcnt;
#ifdef PROTOTYPES
va_start(args, form);
#else
va_start(args);
#endif
cnt = format(_cput, (long)&bb, form, args);
va_end(args);
if (maxcnt > 0)
*(bb.ptr) = '\0';
if (bb.count < 0)
return (-1);
return (cnt);
}
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