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/* Program to generate "main" a Java(TM) class containing a main method.

   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,

   2007, 2008 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation; either version 3, or (at your option)

any later version.

GCC is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with GCC; see the file COPYING3.  If not see

<http://www.gnu.org/licenses/>.

Java and all Java-based marks are trademarks or registered trademarks

of Sun Microsystems, Inc. in the United States and other countries.

The Free Software Foundation is independent of Sun Microsystems, Inc.  */

/* Written by Per Bothner <bothner@cygnus.com> */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tm.h"

#include "obstack.h"

#include "jcf.h"

#include "tree.h"

#include "java-tree.h"

#include "intl.h"

static char * do_mangle_classname (const char *string);

struct obstack  name_obstack;

struct obstack *mangle_obstack = &name_obstack;

static void usage (const char *) ATTRIBUTE_NORETURN;

static void

usage (const char *name)

{

  fprintf (stderr, _("Usage: %s [OPTIONS]... CLASSNAMEmain [OUTFILE]\n"),

           name);

  exit (1);

}

int

main (int argc, char **argv)

{

  char *classname, *p;

  FILE *stream;

  const char *mangled_classname;

  int i, last_arg;

  int indirect = 0;

  char *prog_name = argv[0];

  /* Unlock the stdio streams.  */

  unlock_std_streams ();

  gcc_init_libintl ();

  if (argc > 1 && ! strcmp (argv[1], "-findirect-dispatch"))

    {

      indirect = 1;

      ++argv;

      --argc;

    }

  if (argc < 2)

    usage (prog_name);

  for (i = 1; i < argc; ++i)

    {

      if (! strncmp (argv[i], "-D", 2))

        {

          /* Handled later.  */

        }

      else

        break;

    }

  if (i < argc - 2 || i == argc)

    usage (prog_name);

  last_arg = i;

  classname = argv[i];

  /* gcj always appends `main' to classname.  We need to strip this here.  */

  p = strrchr (classname, 'm');

  if (p == NULL || p == classname || strcmp (p, "main") != 0)

    usage (prog_name);

  else

    *p = '\0';

  gcc_obstack_init (mangle_obstack);

  mangled_classname = do_mangle_classname (classname);

  if (i < argc - 1 && strcmp (argv[i + 1], "-") != 0)

    {

      const char *outfile = argv[i + 1];

      stream = fopen (outfile, "w");

      if (stream == NULL)

        {

          fprintf (stderr, _("%s: Cannot open output file: %s\n"),

                   prog_name, outfile);

          exit (1);

        }

    }

  else

    stream = stdout;

  /* At this point every element of ARGV from 1 to LAST_ARG is a `-D'

     option.  Process them appropriately.  */

  fprintf (stream, "extern const char **_Jv_Compiler_Properties;\n");

  fprintf (stream, "static const char *props[] =\n{\n");

  for (i = 1; i < last_arg; ++i)

    {

      const char *p;

      fprintf (stream, "  \"");

      for (p = &argv[i][2]; *p; ++p)

        {

          if (! ISPRINT (*p))

            fprintf (stream, "\\%o", *p);

          else if (*p == '\\' || *p == '"')

            fprintf (stream, "\\%c", *p);

          else

            putc (*p, stream);

        }

      fprintf (stream, "\",\n");

    }

  fprintf (stream, "  0\n};\n\n");

  fprintf (stream, "int main (int argc, const char **argv)\n");

  fprintf (stream, "{\n");

  fprintf (stream, "   _Jv_Compiler_Properties = props;\n");

  if (indirect)

    fprintf (stream, "   JvRunMainName (\"%s\", argc, argv);\n", classname);

  else

    {

      fprintf (stream, "   extern char %s;\n", mangled_classname);

      fprintf (stream, "   JvRunMain (&%s, argc, argv);\n", mangled_classname);

    }

  fprintf (stream, "}\n");

  if (stream != stdout && fclose (stream) != 0)

    {

      fprintf (stderr, _("%s: Failed to close output file %s\n"),

               prog_name, argv[2]);

      exit (1);

    }

  return 0;

}

static char *

do_mangle_classname (const char *string)

{

  const char *ptr;

  int count = 0;

  obstack_grow (&name_obstack, "_ZN", 3);

  for (ptr = string; *ptr; ptr++ )

    {

      if (*ptr == '.')

        {

          append_gpp_mangled_name (ptr - count, count);

          count = 0;

        }

      else

        count++;

    }

  append_gpp_mangled_name (&ptr [-count], count);

  obstack_grow (mangle_obstack, "6class$E", strlen ("6class$E"));

  obstack_1grow (mangle_obstack, '\0');

  return XOBFINISH (mangle_obstack, char *);

}