libjava/gij.cc

   1 /* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004  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 ("  --verbose[:class] print information about class loading\n");
  39   printf ("  --showversion     print version number, then keep going\n");
  40   printf ("  --version         print version number, then exit\n");
  41   printf ("\nOptions can be specified with `-' or `--'.\n");
  42   printf ("\nSee http://gcc.gnu.org/java/ for information on reporting bugs\n");
  43   exit (0);
  44 }
  45
  46 static void
  47 version ()
  48 {
  49   printf ("gij (GNU libgcj) version %s\n\n", __VERSION__);
  50   printf ("Copyright (C) 2005 Free Software Foundation, Inc.\n");
  51   printf ("This is free software; see the source for copying conditions.  There is NO\n");
  52   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
  53 }
  54
  55 int
  56 main (int argc, const char **argv)
  57 {
  58   /* We rearrange ARGV so that all the -D options appear near the
  59      beginning.  */
  60   int last_D_option = 0;
  61   bool jar_mode = false;
  62
  63   int i;
  64   for (i = 1; i < argc; ++i)
  65     {
  66       const char *arg = argv[i];
  67
  68       /* A non-option stops processing.  */
  69       if (arg[0] != '-')
  70         break;
  71       /* A "--" stops processing.  */
  72       if (! strcmp (arg, "--"))
  73         {
  74           ++i;
  75           break;
  76         }
  77
  78       if (! strncmp (arg, "-D", 2))
  79         {
  80           argv[last_D_option++] = arg + 2;
  81           continue;
  82         }
  83
  84       if (! strcmp (arg, "-jar"))
  85         {
  86           jar_mode = true;
  87           continue;
  88         }
  89
  90       /* Allow both single or double hyphen for all remaining
  91          options.  */
  92       if (arg[1] == '-')
  93         ++arg;
  94
  95       if (! strcmp (arg, "-help") || ! strcmp (arg, "-?"))
  96         help ();
  97       else if (! strcmp (arg, "-version"))
  98         {
  99           version ();
 100           exit (0);
 101         }
 102       else if (! strcmp (arg, "-showversion"))
 103         version ();
 104       /* FIXME: use getopt and avoid the ugliness here.
 105          We at least need to handle the argument in a better way.  */
 106       else if (! strncmp (arg, "-ms=", 4))
 107         _Jv_SetInitialHeapSize (arg + 4);
 108       else if (! strcmp (arg, "-ms"))
 109         {
 110           if (i >= argc - 1)
 111             {
 112             no_arg:
 113               fprintf (stderr, "gij: option requires an argument -- `%s'\n",
 114                        argv[i]);
 115               fprintf (stderr, "Try `gij --help' for more information.\n");
 116               exit (1);
 117             }
 118           _Jv_SetInitialHeapSize (argv[++i]);
 119         }
 120       else if (! strncmp (arg, "-mx=", 4))
 121         _Jv_SetMaximumHeapSize (arg + 4);
 122       else if (! strcmp (arg, "-mx"))
 123         {
 124           if (i >= argc - 1)
 125             goto no_arg;
 126           _Jv_SetMaximumHeapSize (argv[++i]);
 127         }
 128       else if (! strcmp (arg, "-cp") || ! strcmp (arg, "-classpath"))
 129         {
 130           if (i >= argc - 1)
 131             goto no_arg;
 132           // We set _Jv_Jar_Class_Path.  If the user specified `-jar'
 133           // then the jar code will override this.  This is the
 134           // correct behavior.
 135           _Jv_Jar_Class_Path = argv[++i];
 136         }
 137       else if (! strcmp (arg, "-verbose") || ! strcmp (arg, "-verbose:class"))
 138         gcj::verbose_class_flag = true;
 139       else if (arg[1] == 'X')
 140         {
 141           if (arg[2] == '\0')
 142             {
 143               printf ("gij: currently no -X options are recognized\n");
 144               exit (0);
 145             }
 146           /* Ignore other -X options.  */
 147         }
 148       else
 149         {
 150           fprintf (stderr, "gij: unrecognized option -- `%s'\n", argv[i]);
 151           fprintf (stderr, "Try `gij --help' for more information.\n");
 152           exit (1);
 153         }
 154     }
 155
 156   argv[last_D_option] = NULL;
 157   _Jv_Compiler_Properties = argv;
 158
 159   if (argc - i < 1)
 160     {
 161       fprintf (stderr, "Usage: gij [OPTION] ... CLASS [ARGS] ...\n");
 162       fprintf (stderr, "          to invoke CLASS.main, or\n");
 163       fprintf (stderr, "       gij -jar [OPTION] ... JARFILE [ARGS] ...\n");
 164       fprintf (stderr, "          to execute a jar file\n");
 165       fprintf (stderr, "Try `gij --help' for more information.\n");
 166       exit (1);
 167     }
 168
 169   _Jv_RunMain (NULL, argv[i], argc - i, argv + i, jar_mode);
 170 }