boot-111.tar.gz

[apple/boot.git] / i386 / libsa / printf.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright 1993 NeXT, Inc.
 * All rights reserved.
 */

#include "libsa.h"

struct putc_info {
    char * str;
    char * last_str;
};

static void
sputc(int c, struct putc_info * pi)
{
    if (pi->last_str)
        if (pi->str == pi->last_str) {
            *(pi->str) = '\0';
            return;
        }
    *(pi->str)++ = c;
}

/*VARARGS1*/
int sprintf(char * str, const char * fmt, ...)
{
    va_list ap;
    struct putc_info pi;

    va_start(ap, fmt);
    pi.str = str;
    pi.last_str = 0;
    prf(fmt, ap, sputc, &pi);
    *pi.str = '\0';
    va_end(ap);
    return 0;
}

/*VARARGS1*/
int slvprintf(char * str, int len, const char * fmt, va_list ap)
{
    struct putc_info pi;
    pi.str = str;
    pi.last_str = str + len - 1;
    prf(fmt, ap, sputc, &pi);
    *pi.str = '\0';
    return (pi.str - str);
}