libjava/gij.cc

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