i386/libsa/printf.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright 1993 NeXT, Inc.
  27  * All rights reserved.
  28  */
  29
  30 #include "libsa.h"
  31
  32 struct putc_info {
  33     char * str;
  34     char * last_str;
  35 };
  36
  37 static void
  38 sputc(int c, struct putc_info * pi)
  39 {
  40     if (pi->last_str)
  41         if (pi->str == pi->last_str) {
  42             *(pi->str) = '\0';
  43             return;
  44         }
  45     *(pi->str)++ = c;
  46 }
  47
  48 /*VARARGS1*/
  49 int sprintf(char * str, const char * fmt, ...)
  50 {
  51     va_list ap;
  52     struct putc_info pi;
  53
  54     va_start(ap, fmt);
  55     pi.str = str;
  56     pi.last_str = 0;
  57     prf(fmt, ap, sputc, &pi);
  58     *pi.str = '\0';
  59     va_end(ap);
  60     return 0;
  61 }
  62
  63 /*VARARGS1*/
  64 int slvprintf(char * str, int len, const char * fmt, va_list ap)
  65 {
  66     struct putc_info pi;
  67     pi.str = str;
  68     pi.last_str = str + len - 1;
  69     prf(fmt, ap, sputc, &pi);
  70     *pi.str = '\0';
  71     return (pi.str - str);
  72 }
  73