mirror of
https://github.com/reactos/reactos.git
synced 2024-08-30 15:18:33 +00:00
90 lines
1.8 KiB
C
90 lines
1.8 KiB
C
/* @(#)jssnprintf.c 1.14 17/08/03 Copyright 1985, 1995-2017 J. Schilling */
|
|
/*
|
|
* Copyright (c) 1985, 1995-2017 J. Schilling
|
|
*/
|
|
/*
|
|
* The contents of this file are subject to the terms of the
|
|
* Common Development and Distribution License, Version 1.0 only
|
|
* (the "License"). You may not use this file except in compliance
|
|
* with the License.
|
|
*
|
|
* See the file CDDL.Schily.txt in this distribution for details.
|
|
* A copy of the CDDL is also available via the Internet at
|
|
* http://www.opensource.org/licenses/cddl1.txt
|
|
*
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
|
* file and include the License file CDDL.Schily.txt from this distribution.
|
|
*/
|
|
|
|
#include <schily/mconfig.h>
|
|
#include <schily/unistd.h> /* include <sys/types.h> try to get size_t */
|
|
#include <schily/stdio.h> /* Try again for size_t */
|
|
#include <schily/stdlib.h> /* Try again for size_t */
|
|
#include <schily/varargs.h>
|
|
#include <schily/standard.h>
|
|
#include <schily/schily.h>
|
|
|
|
EXPORT int js_snprintf __PR((char *, size_t maxcnt, const char *, ...));
|
|
|
|
typedef struct {
|
|
char *ptr;
|
|
int count;
|
|
} *BUF, _BUF;
|
|
|
|
#ifdef PROTOTYPES
|
|
static void
|
|
_cput(char c, void *l)
|
|
#else
|
|
static void
|
|
_cput(c, l)
|
|
char c;
|
|
void *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
|
|
js_snprintf(char *buf, size_t maxcnt, const char *form, ...)
|
|
#else
|
|
EXPORT int
|
|
js_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, &bb, form, args);
|
|
va_end(args);
|
|
if (maxcnt > 0)
|
|
*(bb.ptr) = '\0';
|
|
if (bb.count < 0)
|
|
return (-1);
|
|
|
|
return (cnt);
|
|
}
|