i386/libsa/printf.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
   7  * Reserved.  This file contains Original Code and/or Modifications of
   8  * Original Code as defined in and that are subject to the Apple Public
   9  * Source License Version 1.1 (the "License").  You may not use this file
  10  * except in compliance with the License.  Please obtain a copy of the
  11  * License at http://www.apple.com/publicsource and read it before using
  12  * this file.
  13  *
  14  * The Original Code and all software distributed under the License are
  15  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  16  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE OR NON- INFRINGEMENT.  Please see the
  19  * License for the specific language governing rights and limitations
  20  * under the License.
  21  *
  22  * @APPLE_LICENSE_HEADER_END@
  23  */
  24 /*
  25  * Copyright 1993 NeXT, Inc.
  26  * All rights reserved.
  27  */
  28
  29 #include "libsa.h"
  30
  31 struct putc_info {
  32     char * str;
  33     char * last_str;
  34 };
  35
  36 static void
  37 sputc(int c, struct putc_info * pi)
  38 {
  39     if (pi->last_str)
  40         if (pi->str == pi->last_str) {
  41             *(pi->str) = '\0';
  42             return;
  43         }
  44     *(pi->str)++ = c;
  45 }
  46
  47 /*VARARGS1*/
  48 int sprintf(char * str, const char * fmt, ...)
  49 {
  50     va_list ap;
  51     struct putc_info pi;
  52
  53     va_start(ap, fmt);
  54     pi.str = str;
  55     pi.last_str = 0;
  56     prf(fmt, ap, sputc, &pi);
  57     *pi.str = '\0';
  58     va_end(ap);
  59     return 0;
  60 }
  61
  62 /*VARARGS1*/
  63 int slvprintf(char * str, int len, const char * fmt, va_list ap)
  64 {
  65     struct putc_info pi;
  66     pi.str = str;
  67     pi.last_str = str + len - 1;
  68     prf(fmt, ap, sputc, &pi);
  69     *pi.str = '\0';
  70     return (pi.str - str);
  71 }
  72