misc/options.c

   1 /*
   2  * Option parsing
   3  *
   4  * Copyright 2000 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include <stdarg.h>
  23 #include <string.h>
  24 #include <stdlib.h>
  25
  26 #include "windef.h"
  27 #include "winbase.h"
  28 #include "winnls.h"
  29 #include "winreg.h"
  30 #include "winternl.h"
  31 #include "wine/library.h"
  32 #include "options.h"
  33 #include "wine/debug.h"
  34
  35 struct option_descr
  36 {
  37     const char *longname;
  38     char        shortname;
  39     int         has_arg;
  40     void      (*func)( const char *arg );
  41     const char *usage;
  42 };
  43
  44 static void do_debugmsg( const char *arg );
  45 static void do_help( const char *arg );
  46 static void do_version( const char *arg );
  47
  48 static const struct option_descr option_table[] =
  49 {
  50     { "debugmsg",     0, 1, do_debugmsg,
  51       "--debugmsg name  No longer supported, use the WINEDEBUG variable instead" },
  52     { "help",       'h', 0, do_help,
  53       "--help,-h        Show this help message" },
  54     { "version",    'v', 0, do_version,
  55       "--version,-v     Display the Wine version" },
  56     { NULL,           0, 0, NULL, NULL }  /* terminator */
  57 };
  58
  59
  60 static void do_help( const char *arg )
  61 {
  62     OPTIONS_Usage();
  63 }
  64
  65 static void do_version( const char *arg )
  66 {
  67     MESSAGE( "%s\n", PACKAGE_STRING );
  68     ExitProcess(0);
  69 }
  70
  71 static void do_debugmsg( const char *arg )
  72 {
  73     MESSAGE("Error: the --debugmsg option is no longer supported. You should use\n");
  74     MESSAGE("the WINEDEBUG environment variable instead, like this:\n\n");
  75     MESSAGE("  WINEDEBUG=%s wine ...\n\n", arg );
  76     ExitProcess(1);
  77 }
  78
  79 static inline void remove_options( char *argv[], int pos, int count )
  80 {
  81     while ((argv[pos] = argv[pos+count])) pos++;
  82 }
  83
  84 /* parse options from the argv array and remove all the recognized ones */
  85 static void parse_options( char *argv[] )
  86 {
  87     const struct option_descr *opt;
  88     int i;
  89
  90     for (i = 0; argv[i]; i++)
  91     {
  92         const char *equalarg = NULL;
  93         char *p = argv[i];
  94         if (*p++ != '-') continue;  /* not an option */
  95         if (*p && !p[1]) /* short name */
  96         {
  97             if (*p == '-') break; /* "--" option */
  98             for (opt = option_table; opt->longname; opt++) if (opt->shortname == *p) break;
  99         }
 100         else  /* long name */
 101         {
 102             const char *equal = strchr  (p, '=');
 103             if (*p == '-') p++;
 104             /* check for the long name */
 105             for (opt = option_table; opt->longname; opt++) {
 106                 /* Plain --option */
 107                 if (!strcmp( p, opt->longname )) break;
 108
 109                 /* --option=value */
 110                 if (opt->has_arg &&
 111                     equal &&
 112                     strlen (opt->longname) == equal - p &&
 113                     !strncmp (p, opt->longname, equal - p)) {
 114                         equalarg = equal + 1;
 115                         break;
 116                     }
 117             }
 118         }
 119         if (!opt->longname) continue;
 120
 121         if (equalarg)
 122         {
 123             opt->func( equalarg );
 124             remove_options( argv, i, 1 );
 125         }
 126         else if (opt->has_arg && argv[i+1])
 127         {
 128             opt->func( argv[i+1] );
 129             remove_options( argv, i, 2 );
 130         }
 131         else
 132         {
 133             opt->func( "" );
 134             remove_options( argv, i, 1 );
 135         }
 136         i--;
 137     }
 138 }
 139
 140 /***********************************************************************
 141  *              OPTIONS_Usage
 142  */
 143 void OPTIONS_Usage(void)
 144 {
 145     const struct option_descr *opt;
 146     MESSAGE( "%s\n\n", PACKAGE_STRING );
 147     MESSAGE( "Usage: wine [options] [--] program_name [arguments]\n" );
 148     MESSAGE("The -- has to be used if you specify arguments (of the program)\n\n");
 149     MESSAGE( "Options:\n" );
 150     for (opt = option_table; opt->longname; opt++) MESSAGE( "   %s\n", opt->usage );
 151     ExitProcess(0);
 152 }
 153
 154 /***********************************************************************
 155  *              OPTIONS_ParseOptions
 156  */
 157 void OPTIONS_ParseOptions( char *argv[] )
 158 {
 159     int i;
 160
 161     parse_options( argv + 1 );
 162
 163     /* check if any option remains */
 164     for (i = 1; argv[i]; i++)
 165     {
 166         if (!strcmp( argv[i], "--" ))
 167         {
 168             remove_options( argv, i, 1 );
 169             break;
 170         }
 171         if (argv[i][0] == '-')
 172         {
 173             MESSAGE( "Unknown option '%s'\n\n", argv[i] );
 174             OPTIONS_Usage();
 175         }
 176     }
 177 }