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 ("  --version         print version number, then exit\n");
  38   printf ("\nOptions can be specified with `-' or `--'.\n");
  39   printf ("\nSee http://gcc.gnu.org/java/ for information on reporting bugs\n");
  40   exit (0);
  41 }
  42
  43 static void
  44 version ()
  45 {
  46   printf ("gij (GNU libgcj) version %s\n\n", __VERSION__);
  47   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
  48   printf ("This is free software; see the source for copying conditions.  There is NO\n");
  49   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n");
  50   exit (0);
  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         version ();
  97       /* FIXME: use getopt and avoid the ugliness here.
  98          We at least need to handle the argument in a better way.  */
  99       else if (! strncmp (arg, "-ms=", 4))
 100         _Jv_SetInitialHeapSize (arg + 4);
 101       else if (! strcmp (arg, "-ms"))
 102         {
 103           if (i >= argc - 1)
 104             {
 105             no_arg:
 106               fprintf (stderr, "gij: option requires an argument -- `%s'\n",
 107                        argv[i]);
 108               fprintf (stderr, "Try `gij --help' for more information.\n");
 109               exit (1);
 110             }
 111           _Jv_SetInitialHeapSize (argv[++i]);
 112         }
 113       else if (! strncmp (arg, "-mx=", 4))
 114         _Jv_SetMaximumHeapSize (arg + 4);
 115       else if (! strcmp (arg, "-mx"))
 116         {
 117           if (i >= argc - 1)
 118             goto no_arg;
 119           _Jv_SetMaximumHeapSize (argv[++i]);
 120         }
 121       else if (! strcmp (arg, "-cp") || ! strcmp (arg, "-classpath"))
 122         {
 123           if (i >= argc - 1)
 124             goto no_arg;
 125           // We set _Jv_Jar_Class_Path.  If the user specified `-jar'
 126           // then the jar code will override this.  This is the
 127           // correct behavior.
 128           _Jv_Jar_Class_Path = argv[++i];
 129         }
 130       else
 131         {
 132           fprintf (stderr, "gij: unrecognized option -- `%s'\n", argv[i]);
 133           fprintf (stderr, "Try `gij --help' for more information.\n");
 134           exit (1);
 135         }
 136     }
 137
 138   argv[last_D_option] = NULL;
 139   _Jv_Compiler_Properties = argv;
 140
 141   if (argc - i < 1)
 142     {
 143       fprintf (stderr, "Usage: gij [OPTION] ... CLASS [ARGS] ...\n");
 144       fprintf (stderr, "          to invoke CLASS.main, or\n");
 145       fprintf (stderr, "       gij -jar [OPTION] ... JARFILE [ARGS] ...\n");
 146       fprintf (stderr, "          to execute a jar file\n");
 147       fprintf (stderr, "Try `gij --help' for more information.\n");
 148       exit (1);
 149     }
 150
 151   _Jv_RunMain (NULL, argv[i], argc - i, argv + i, jar_mode);
 152 }