tools/trace-malloc/getopt.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
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   6  * 1.1 (the "License"); you may not use this file except in compliance with
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  15  * The Original Code is mozilla.org code.
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  17  * The Initial Developer of the Original Code is
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  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
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  24  * Alternatively, the contents of this file may be used under the terms of
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  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  36  * ***** END LICENSE BLOCK ***** */
  37 /*
  38  * Copyright (c) 1987 Regents of the University of California.
  39  * All rights reserved.
  40  *
  41  * Redistribution and use in source and binary forms are permitted
  42  * provided that: (1) source distributions retain this entire copyright
  43  * notice and comment, and (2) distributions including binaries display
  44  * the following acknowledgement:  ``This product includes software
  45  * developed by the University of California, Berkeley and its contributors''
  46  * in the documentation or other materials provided with the distribution
  47  * and in all advertising materials mentioning features or use of this
  48  * software. Neither the name of the University nor the names of its
  49  * contributors may be used to endorse or promote products derived
  50  * from this software without specific prior written permission.
  51  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  52  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  53  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  54  */
  55
  56 #if defined(LIBC_SCCS) && !defined(lint)
  57 static char sccsid[] = "@(#)getopt.c    4.12 (Berkeley) 6/1/90";
  58 #endif /* LIBC_SCCS and not lint */
  59
  60 #include <stdio.h>
  61 #include <string.h>
  62 #define index strchr
  63 #define rindex strrchr
  64
  65 /*
  66  * get option letter from argument vector
  67  */
  68 int     opterr = 1,             /* if error message should be printed */
  69         optind = 1,             /* index into parent argv vector */
  70         optopt;                 /* character checked for validity */
  71 char    *optarg;                /* argument associated with option */
  72
  73 #define BADCH   (int)'?'
  74 #define EMSG    ""
  75
  76 getopt(int nargc, char **nargv, char *ostr)
  77 {
  78         static char *place = EMSG;              /* option letter processing */
  79         register char *oli;                     /* option letter list index */
  80         char *p;
  81
  82         if (!*place) {                          /* update scanning pointer */
  83                 if (optind >= nargc || *(place = nargv[optind]) != '-') {
  84                         place = EMSG;
  85                         return(EOF);
  86                 }
  87                 if (place[1] && *++place == '-') {      /* found "--" */
  88                         ++optind;
  89                         place = EMSG;
  90                         return(EOF);
  91                 }
  92         }                                       /* option letter okay? */
  93         if ((optopt = (int)*place++) == (int)':' ||
  94             !(oli = index(ostr, optopt))) {
  95                 /*
  96                  * if the user didn't specify '-' as an option,
  97                  * assume it means EOF.
  98                  */
  99                 if (optopt == (int)'-')
 100                         return(EOF);
 101                 if (!*place)
 102                         ++optind;
 103                 if (opterr) {
 104                         if (!(p = rindex(*nargv, '/')))
 105                                 p = *nargv;
 106                         else
 107                                 ++p;
 108                         (void)fprintf(stderr, "%s: illegal option -- %c\n",
 109                             p, optopt);
 110                 }
 111                 return(BADCH);
 112         }
 113         if (*++oli != ':') {                    /* don't need argument */
 114                 optarg = NULL;
 115                 if (!*place)
 116                         ++optind;
 117         }
 118         else {                                  /* need an argument */
 119                 if (*place)                     /* no white space */
 120                         optarg = place;
 121                 else if (nargc <= ++optind) {   /* no arg */
 122                         place = EMSG;
 123                         if (!(p = rindex(*nargv, '/')))
 124                                 p = *nargv;
 125                         else
 126                                 ++p;
 127                         if (opterr)
 128                                 (void)fprintf(stderr,
 129                                     "%s: option requires an argument -- %c\n",
 130                                     p, optopt);
 131                         return(BADCH);
 132                 }
 133                 else                            /* white space */
 134                         optarg = nargv[optind];
 135                 place = EMSG;
 136                 ++optind;
 137         }
 138         return(optopt);                         /* dump back option letter */
 139 }