vx32

Local 9vx git repository for patches.
git clone git://r-36.net/vx32
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snprintf.c (2762B)


      1 /*-
      2  * Copyright (c) 1990, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  *
      5  * This code is derived from software contributed to Berkeley by
      6  * Chris Torek.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  * 1. Redistributions of source code must retain the above copyright
     12  *    notice, this list of conditions and the following disclaimer.
     13  * 2. Redistributions in binary form must reproduce the above copyright
     14  *    notice, this list of conditions and the following disclaimer in the
     15  *    documentation and/or other materials provided with the distribution.
     16  * 3. All advertising materials mentioning features or use of this software
     17  *    must display the following acknowledgement:
     18  *	This product includes software developed by the University of
     19  *	California, Berkeley and its contributors.
     20  * 4. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  */
     36 
     37 #if defined(LIBC_SCCS) && !defined(lint)
     38 static char rcsid[] = "$OpenBSD: snprintf.c,v 1.6 1998/01/12 06:20:56 millert Exp $";
     39 #endif /* LIBC_SCCS and not lint */
     40 
     41 #include <limits.h>
     42 #include <stdio.h>
     43 #ifdef __STDC__
     44 #include <stdarg.h>
     45 #else
     46 #include <varargs.h>
     47 #endif
     48 
     49 int
     50 #ifdef __STDC__
     51 snprintf(char *str, size_t n, char const *fmt, ...)
     52 #else
     53 snprintf(str, n, fmt, va_alist)
     54 	char *str;
     55 	size_t n;
     56 	char *fmt;
     57 	va_dcl
     58 #endif
     59 {
     60 	int ret;
     61 	va_list ap;
     62 	FILE f;
     63 
     64 	/* While snprintf(3) specifies size_t stdio uses an int internally */
     65 	if (n > INT_MAX)
     66 		n = INT_MAX;
     67 #ifdef __STDC__
     68 	va_start(ap, fmt);
     69 #else
     70 	va_start(ap);
     71 #endif
     72 	f._file = -1;
     73 	f._flags = __SWR | __SSTR;
     74 	f._bf._base = f._p = (unsigned char *)str;
     75 	f._bf._size = f._w = n ? n - 1 : 0;
     76 	ret = vfprintf(&f, fmt, ap);
     77 	if (n)
     78 		*f._p = '\0';
     79 	va_end(ap);
     80 	return (ret);
     81 }