usr.bin/doscmd/ParseBuffer.c

   1 /*
   2  * Copyright (c) 1992, 1993, 1996
   3  *      Berkeley Software Design, Inc.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by Berkeley Software
  16  *      Design, Inc.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY Berkeley Software Design, Inc. ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL Berkeley Software Design, Inc. BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  *
  30  *      BSDI ParseBuffer.c,v 2.2 1996/04/08 19:32:15 bostic Exp
  31  *
  32  * $FreeBSD: src/usr.bin/doscmd/ParseBuffer.c,v 1.2.2.2 2002/04/25 11:04:50 tg Exp $
  33  * $DragonFly: src/usr.bin/doscmd/ParseBuffer.c,v 1.4 2005/04/10 20:55:38 drhodus Exp $
  34  */
  35
  36 #include <stdlib.h>
  37 #include <string.h>
  38
  39 #include "doscmd.h"
  40 int
  41 ParseBuffer(char *obuf, char **av, int mac)
  42 {
  43         static char *_buf;
  44         char *buf = NULL;
  45         static int buflen = 0;
  46         int len;
  47
  48         char *b = buf;
  49         char *p;
  50         char **a;
  51         char **e;
  52
  53         len = strlen(obuf) + 1;
  54         if (len > buflen) {
  55                 if (buflen)
  56                         free(_buf);
  57                 buflen = (len + 1023) & ~1023;
  58                 _buf = malloc(buflen);
  59         }
  60         buf = _buf;
  61         strcpy(buf, obuf);
  62
  63         a = av;
  64         e = &av[mac];
  65
  66         while (*buf) {
  67                 while (*buf == ' ' || *buf == '\t' || *buf == '\n')
  68                         ++buf;
  69                 if (*buf) {
  70                         p = b = buf;
  71
  72                         *a++ = buf;
  73                         if (a == e) {
  74                                 a[-1] = NULL;
  75                                 return(mac - 1);
  76                         }
  77
  78                         while (*p && !(*p == ' ' || *p == '\t' || *p == '\n')) {
  79                                 *b++ = *p++ & 0177;
  80                         }
  81                         if (*p)
  82                                 ++p;
  83                         *b = 0;
  84                         buf = p;
  85                 }
  86         }
  87         *a = NULL;
  88         return(a - av);
  89 }