libjava/gij.cc

   1 /* Copyright (C) 1999, 2000, 2001, 2002, 2003  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 /* Author: Kresten Krab Thorup <krab@gnu.org>  */
  10
  11 #include <config.h>
  12
  13 #include <jvm.h>
  14 #include <gcj/cni.h>
  15 #include <java-props.h>
  16
  17 #include <stdio.h>
  18 #include <string.h>
  19 #include <stdlib.h>
  20
  21 #include <java/lang/System.h>
  22 #include <java/util/Properties.h>
  23
  24 static void
  25 help ()
  26 {
  27   printf ("Usage: gij [OPTION] ... CLASS [ARGS] ...\n");
  28   printf ("          to interpret Java bytecodes, or\n");
  29   printf ("       gij -jar [OPTION] ... JARFILE [ARGS] ...\n");
  30   printf ("          to execute a jar file\n\n");
  31   printf ("  --cp LIST         set class path\n");
  32   printf ("  --classpath LIST  set class path\n");
  33   printf ("  -DVAR=VAL         define property VAR with value VAL\n");
  34   printf ("  -?, --help        print this help, then exit\n");
  35   printf ("  -X                print help on supported -X options, then exit\n");
  36   printf ("  --ms=NUMBER       set initial heap size\n");
  37   printf ("  --mx=NUMBER       set maximum heap size\n");
  38   printf ("  --showversion     print version number, then keep going\n");
  39   printf ("  --version         print version number, then exit\n");
  40   printf ("\nOptions can be specified with `-' or `--'.\n");
  41   printf ("\nSee http://gcc.gnu.org/java/ for information on reporting bugs\n");
  42   exit (0);
  43 }
  44
  45 static void
  46 version ()
  47 {
  48   printf ("gij (GNU libgcj) version %s\n\n", __VERSION__);
  49   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
  50   printf ("This is free software; see the source for copying conditions.  There is NO\n");
  51   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
  52 }
  53
  54 int
  55 main (int argc, const char **argv)
  56 {
  57   /* We rearrange ARGV so that all the -D options appear near the
  58      beginning.  */
  59   int last_D_option = 0;
  60   bool jar_mode = false;
  61
  62   int i;
  63   for (i = 1; i < argc; ++i)
  64     {
  65       const char *arg = argv[i];
  66
  67       /* A non-option stops processing.  */
  68       if (arg[0] != '-')
  69         break;
  70       /* A "--" stops processing.  */
  71       if (! strcmp (arg, "--"))
  72         {
  73           ++i;
  74           break;
  75         }
  76
  77       if (! strncmp (arg, "-D", 2))
  78         {
  79           argv[last_D_option++] = arg + 2;
  80           continue;
  81         }
  82
  83       if (! strcmp (arg, "-jar"))
  84         {
  85           jar_mode = true;
  86           continue;
  87         }
  88
  89       /* Allow both single or double hyphen for all remaining
  90          options.  */
  91       if (arg[1] == '-')
  92         ++arg;
  93
  94       if (! strcmp (arg, "-help") || ! strcmp (arg, "-?"))
  95         help ();
  96       else if (! strcmp (arg, "-version"))
  97         {
  98           version ();
  99           exit (0);
 100         }
 101       else if (! strcmp (arg, "-showversion"))
 102         version ();
 103       /* FIXME: use getopt and avoid the ugliness here.
 104          We at least need to handle the argument in a better way.  */
 105       else if (! strncmp (arg, "-ms=", 4))
 106         _Jv_SetInitialHeapSize (arg + 4);
 107       else if (! strcmp (arg, "-ms"))
 108         {
 109           if (i >= argc - 1)
 110             {
 111             no_arg:
 112               fprintf (stderr, "gij: option requires an argument -- `%s'\n",
 113                        argv[i]);
 114               fprintf (stderr, "Try `gij --help' for more information.\n");
 115               exit (1);
 116             }
 117           _Jv_SetInitialHeapSize (argv[++i]);
 118         }
 119       else if (! strncmp (arg, "-mx=", 4))
 120         _Jv_SetMaximumHeapSize (arg + 4);
 121       else if (! strcmp (arg, "-mx"))
 122         {
 123           if (i >= argc - 1)
 124             goto no_arg;
 125           _Jv_SetMaximumHeapSize (argv[++i]);
 126         }
 127       else if (! strcmp (arg, "-cp") || ! strcmp (arg, "-classpath"))
 128         {
 129           if (i >= argc - 1)
 130             goto no_arg;
 131           // We set _Jv_Jar_Class_Path.  If the user specified `-jar'
 132           // then the jar code will override this.  This is the
 133           // correct behavior.
 134           _Jv_Jar_Class_Path = argv[++i];
 135         }
 136       else if (arg[1] == 'X')
 137         {
 138           if (arg[2] == '\0')
 139             {
 140               printf ("gij: currently no -X options are recognized\n");
 141               exit (0);
 142             }
 143           /* Ignore other -X options.  */
 144         }
 145       else
 146         {
 147           fprintf (stderr, "gij: unrecognized option -- `%s'\n", argv[i]);
 148           fprintf (stderr, "Try `gij --help' for more information.\n");
 149           exit (1);
 150         }
 151     }
 152
 153   argv[last_D_option] = NULL;
 154   _Jv_Compiler_Properties = argv;
 155
 156   if (argc - i < 1)
 157     {
 158       fprintf (stderr, "Usage: gij [OPTION] ... CLASS [ARGS] ...\n");
 159       fprintf (stderr, "          to invoke CLASS.main, or\n");
 160       fprintf (stderr, "       gij -jar [OPTION] ... JARFILE [ARGS] ...\n");
 161       fprintf (stderr, "          to execute a jar file\n");
 162       fprintf (stderr, "Try `gij --help' for more information.\n");
 163       exit (1);
 164     }
 165
 166   _Jv_RunMain (NULL, argv[i], argc - i, argv + i, jar_mode);
 167 }