libjava/gij.cc

   1 /* Copyright (C) 1999, 2000, 2001, 2002  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 ("  -DVAR=VAL         define property VAR with value VAL\n");
  32   printf ("  --help            print this help, then exit\n");
  33   printf ("  --ms=NUMBER       set initial heap size\n");
  34   printf ("  --mx=NUMBER       set maximum heap size\n");
  35   printf ("  --version         print version number, then exit\n");
  36   printf ("\nSee http://gcc.gnu.org/java/ for information on reporting bugs\n");
  37   exit (0);
  38 }
  39
  40 static void
  41 version ()
  42 {
  43   printf ("gij (GNU libgcj) version %s\n\n", __VERSION__);
  44   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
  45   printf ("This is free software; see the source for copying conditions.  There is NO\n");
  46   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
  47   exit (0);
  48 }
  49
  50 int
  51 main (int argc, const char **argv)
  52 {
  53   /* We rearrange ARGV so that all the -D options appear near the
  54      beginning.  */
  55   int last_D_option = 0;
  56   bool jar_mode = false;
  57
  58   int i;
  59   for (i = 1; i < argc; ++i)
  60     {
  61       const char *arg = argv[i];
  62
  63       /* A non-option stops processing.  */
  64       if (arg[0] != '-')
  65         break;
  66       /* A "--" stops processing.  */
  67       if (! strcmp (arg, "--"))
  68         {
  69           ++i;
  70           break;
  71         }
  72
  73       if (! strncmp (arg, "-D", 2))
  74         {
  75           argv[last_D_option++] = arg + 2;
  76           continue;
  77         }
  78
  79       if (! strcmp (arg, "-jar"))
  80         {
  81           jar_mode = true;
  82           continue;
  83         }
  84
  85       /* Allow both single or double hyphen for all remaining
  86          options.  */
  87       if (arg[1] == '-')
  88         ++arg;
  89
  90       if (! strcmp (arg, "-help"))
  91         help ();
  92       else if (! strcmp (arg, "-version"))
  93         version ();
  94       /* FIXME: use getopt and avoid the ugliness here.
  95          We at least need to handle the argument in a better way.  */
  96       else if (! strncmp (arg, "-ms=", 4))
  97         _Jv_SetInitialHeapSize (arg + 4);
  98       else if (! strcmp (arg, "-ms"))
  99         {
 100           if (i >= argc - 1)
 101             {
 102             no_arg:
 103               fprintf (stderr, "gij: option requires an argument -- `%s'\n",
 104                        argv[i]);
 105               fprintf (stderr, "Try `gij --help' for more information.\n");
 106               exit (1);
 107             }
 108           _Jv_SetInitialHeapSize (argv[++i]);
 109         }
 110       else if (! strncmp (arg, "-mx=", 4))
 111         _Jv_SetMaximumHeapSize (arg + 4);
 112       else if (! strcmp (arg, "-mx"))
 113         {
 114           if (i >= argc - 1)
 115             goto no_arg;
 116           _Jv_SetMaximumHeapSize (argv[++i]);
 117         }
 118       else
 119         {
 120           fprintf (stderr, "gij: unrecognized option -- `%s'\n", argv[i]);
 121           fprintf (stderr, "Try `gij --help' for more information.\n");
 122           exit (1);
 123         }
 124     }
 125
 126   argv[last_D_option] = NULL;
 127   _Jv_Compiler_Properties = argv;
 128
 129   if (argc - i < 1)
 130     {
 131       fprintf (stderr, "Usage: gij [OPTION] ... CLASS [ARGS] ...\n");
 132       fprintf (stderr, "          to invoke CLASS.main, or\n");
 133       fprintf (stderr, "       gij -jar [OPTION] ... JARFILE [ARGS] ...\n");
 134       fprintf (stderr, "          to execute a jar file\n");
 135       fprintf (stderr, "Try `gij --help' for more information.\n");
 136       exit (1);
 137     }
 138
 139   _Jv_RunMain (NULL, argv[i], argc - i, argv + i, jar_mode);
 140 }