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