libjava/gij.cc

   1 /* Copyright (C) 1999  Cygnus Solutions
   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
  20 #include <java/lang/System.h>
  21 #include <java/util/Properties.h>
  22
  23 static void
  24 help ()
  25 {
  26   printf ("Usage: gij [OPTION] ... CLASS [ARGS] ...\n\n");
  27   printf ("Interpret Java bytecodes\n\n");
  28   printf ("  -DVAR=VAL         define property VAR with value VAL\n");
  29   printf ("  --help            print this help, then exit\n");
  30   printf ("  --ms=NUMBER       set initial heap size\n");
  31   printf ("  --mx=NUMBER       set maximum heap size\n");
  32   printf ("  --version         print version number, then exit\n");
  33   printf ("\nSee http://sourceware.cygnus.com/java/ for information on reporting bugs\n");
  34   exit (0);
  35 }
  36
  37 static void
  38 version ()
  39 {
  40   printf ("gij (GNU libgcj) version %s\n\n", VERSION);
  41   printf ("Copyright (C) 1999 Cygnus Solutions.\n");
  42   printf ("This is free software; see the source for copying conditions.  There is NO\n");
  43   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
  44   exit (0);
  45 }
  46
  47 int
  48 main (int argc, const char **argv)
  49 {
  50   /* We rearrange ARGV so that all the -D options appear near the
  51      beginning.  */
  52   int last_D_option = 0;
  53
  54   int i;
  55   for (i = 1; i < argc; ++i)
  56     {
  57       const char *arg = argv[i];
  58
  59       /* A non-option stops processing.  */
  60       if (arg[0] != '-')
  61         break;
  62       /* A "--" stops processing.  */
  63       if (! strcmp (arg, "--"))
  64         {
  65           ++i;
  66           break;
  67         }
  68
  69       if (! strncmp (arg, "-D", 2))
  70         {
  71           argv[last_D_option++] = arg + 2;
  72           continue;
  73         }
  74
  75       /* Allow both single or double hyphen for all remaining
  76          options.  */
  77       if (arg[1] == '-')
  78         ++arg;
  79
  80       if (! strcmp (arg, "-help"))
  81         help ();
  82       else if (! strcmp (arg, "-version"))
  83         version ();
  84       /* FIXME: use getopt and avoid the ugliness here.
  85          We at least need to handle the argument in a better way.  */
  86       else if (! strncmp (arg, "-ms=", 4))
  87         _Jv_SetInitialHeapSize (arg + 4);
  88       else if (! strcmp (arg, "-ms"))
  89         {
  90           if (i >= argc - 1)
  91             {
  92             no_argument:
  93               fprintf (stderr, "gij: option requires an argument -- `%s'\n",
  94                        argv[i]);
  95               fprintf (stderr, "Try `gij --help' for more information.\n");
  96               exit (1);
  97             }
  98           _Jv_SetInitialHeapSize (argv[++i]);
  99         }
 100       else if (! strncmp (arg, "-mx=", 4))
 101         _Jv_SetMaximumHeapSize (arg + 4);
 102       else if (! strcmp (arg, "-mx"))
 103         {
 104           if (i >= argc - 1)
 105             goto no_argument;
 106           _Jv_SetMaximumHeapSize (argv[++i]);
 107         }
 108       else
 109         {
 110           fprintf (stderr, "gij: unrecognized option -- `%s'\n", argv[i]);
 111           fprintf (stderr, "Try `gij --help' for more information.\n");
 112           exit (1);
 113         }
 114     }
 115
 116   argv[last_D_option] = NULL;
 117   _Jv_Compiler_Properties = argv;
 118
 119   if (argc - i < 1)
 120     {
 121       fprintf (stderr, "Usage: gij [OPTION] ... CLASS [ARGS] ...\n");
 122       fprintf (stderr, "Try `gij --help' for more information.\n");
 123       exit (1);
 124     }
 125
 126   _Jv_RunMain (argv[i], argc - i, argv + i);
 127 }