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Annotation of sys/lib/libsa/snprintf.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: snprintf.c,v 1.4 2004/01/03 14:08:53 espie Exp $      */
        !             2: /*     $NetBSD: printf.c,v 1.10 1996/11/30 04:19:21 gwr Exp $  */
        !             3:
        !             4: /*-
        !             5:  * Copyright (c) 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             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. Neither the name of the University nor the names of its contributors
        !            17:  *    may be used to endorse or promote products derived from this software
        !            18:  *    without specific prior written permission.
        !            19:  *
        !            20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            30:  * SUCH DAMAGE.
        !            31:  *
        !            32:  *     @(#)printf.c    8.1 (Berkeley) 6/11/93
        !            33:  */
        !            34:
        !            35: #include <sys/cdefs.h>
        !            36: #include <sys/types.h>
        !            37: #include <sys/stdarg.h>
        !            38:
        !            39: #include "stand.h"
        !            40:
        !            41: extern void kprintn(void (*)(int), u_long, int);
        !            42: extern void kdoprnt(void (*)(int), const char *, va_list);
        !            43:
        !            44: #ifndef        STRIPPED
        !            45: static void sputchar(int);
        !            46:
        !            47: static char *sbuf, *sbuf_end;
        !            48: static size_t sbuf_len;
        !            49:
        !            50: void
        !            51: sputchar(int c)
        !            52: {
        !            53:        if (sbuf < sbuf_end)
        !            54:                *sbuf = c;
        !            55:        sbuf++;
        !            56: }
        !            57:
        !            58: int
        !            59: snprintf(char *buf, size_t len, const char *fmt, ...)
        !            60: {
        !            61:        va_list ap;
        !            62:
        !            63:        sbuf = buf;
        !            64:        sbuf_len = len;
        !            65:        sbuf_end = sbuf + len;
        !            66:        va_start(ap, fmt);
        !            67:        kdoprnt(sputchar, fmt, ap);
        !            68:        va_end(ap);
        !            69:
        !            70:        if (sbuf < sbuf_end)
        !            71:                *sbuf = '\0';
        !            72:        else if (len > 0)
        !            73:                *(sbuf_end - 1) = '\0';
        !            74:
        !            75:        return sbuf - buf;
        !            76: }
        !            77:
        !            78: #endif /* STRIPPED */