snprintf.c - vx32 - Local 9vx git repository for patches.
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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 }