bootx.tproj/libclite.subproj/sprintf.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright 1993 NeXT, Inc.
  24  * All rights reserved.
  25  */
  26 /*
  27  *  sprintf.c - sprintf and helper functions.
  28  *
  29  *  Copyright (c) 1998-2000 Apple Computer, Inc.
  30  *
  31  *  DRI: Josh de Cesare
  32  */
  33
  34 #include <libclite.h>
  35
  36 struct putc_info {
  37     char *str;
  38     char *last_str;
  39 };
  40
  41 static void
  42 sputc(
  43     int c,
  44     struct putc_info *pi
  45 )
  46 {
  47     if (pi->last_str)
  48         if (pi->str == pi->last_str) {
  49             *(pi->str) = '\0';
  50             return;
  51         }
  52     *(pi->str)++ = c;
  53 }
  54
  55 /*VARARGS1*/
  56 int sprintf(char *str, const char *fmt, ...)
  57 {
  58     va_list ap;
  59     struct putc_info pi;
  60
  61     va_start(ap, fmt);
  62     pi.str = str;
  63     pi.last_str = 0;
  64     prf(fmt, ap, sputc, &pi);
  65     *pi.str = '\0';
  66     va_end(ap);
  67     return 0;
  68 }
  69
  70 /*VARARGS1*/
  71 int slvprintf(char *str, int len, const char *fmt, va_list ap )
  72 {
  73     struct putc_info pi;
  74     pi.str = str;
  75     pi.last_str = str + len - 1;
  76     prf(fmt, ap, sputc, &pi);
  77     *pi.str = '\0';
  78     return (pi.str - str);
  79 }