resource.c   [plain text]

/* Functions related to building resource files.
   Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
   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 2, 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 COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.

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.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
#include "rtl.h"
#include "flags.h"
#include "java-tree.h"
#include "jcf.h"
#include "obstack.h"
#include "toplev.h"
#include "output.h"
#include "parse.h"
#include "function.h"
#include "ggc.h"
#include "stdio.h"
#include "target.h"
#include "expr.h"
#include "tree-iterator.h"

/* DOS brain-damage */
#ifndef O_BINARY
#define O_BINARY 0 /* MS-DOS brain-damage */
#endif

/* A list of all the resources files.  */
static GTY(()) tree resources = NULL;

/* Count of all the resources compiled in this invocation.  */
static int Jr_count = 0;

void
compile_resource_data (const char *name, const char *buffer, int length)
{
  tree rtype, field = NULL_TREE, data_type, rinit, data, decl;
  char buf[60];

  data_type = build_prim_array_type (unsigned_byte_type_node,
				     strlen (name) + length);
  rtype = make_node (RECORD_TYPE);
  PUSH_FIELD (rtype, field, "name_length", unsigned_int_type_node);
  PUSH_FIELD (rtype, field, "resource_length", unsigned_int_type_node);
  PUSH_FIELD (rtype, field, "data", data_type);
  FINISH_RECORD (rtype);
  START_RECORD_CONSTRUCTOR (rinit, rtype);
  PUSH_FIELD_VALUE (rinit, "name_length", 
		    build_int_cst (NULL_TREE, strlen (name)));
  PUSH_FIELD_VALUE (rinit, "resource_length", 
		    build_int_cst (NULL_TREE, length));
  data = build_string (strlen(name) + length, buffer);
  TREE_TYPE (data) = data_type;
  PUSH_FIELD_VALUE (rinit, "data", data);
  FINISH_RECORD_CONSTRUCTOR (rinit);
  TREE_CONSTANT (rinit) = 1;
  TREE_INVARIANT (rinit) = 1;

  /* Generate a unique-enough identifier.  */
  sprintf (buf, "_Jr%d", ++Jr_count);

  decl = build_decl (VAR_DECL, get_identifier (buf), rtype);
  TREE_STATIC (decl) = 1;
  DECL_ARTIFICIAL (decl) = 1;
  DECL_IGNORED_P (decl) = 1;
  TREE_READONLY (decl) = 1;
  TREE_THIS_VOLATILE (decl) = 0;
  DECL_INITIAL (decl) = rinit;
  layout_decl (decl, 0);
  pushdecl (decl);
  rest_of_decl_compilation (decl, global_bindings_p (), 0);
  make_decl_rtl (decl);
  assemble_variable (decl, 1, 0, 0);

  resources = tree_cons (NULL_TREE, decl, resources);
}

void
write_resource_constructor (tree *list_p)
{
  tree iter, t, register_resource_fn;

  if (resources == NULL)
    return;

  t = build_function_type_list (void_type_node, ptr_type_node, NULL);
  t = build_decl (FUNCTION_DECL, get_identifier ("_Jv_RegisterResource"), t);
  TREE_PUBLIC (t) = 1;
  DECL_EXTERNAL (t) = 1;
  register_resource_fn = t;

  /* Write out entries in the same order in which they were defined.  */
  for (iter = nreverse (resources); iter ; iter = TREE_CHAIN (iter))
    {
      t = build_fold_addr_expr (TREE_VALUE (iter));
      t = tree_cons (NULL, t, NULL);
      t = build_function_call_expr (register_resource_fn, t);
      append_to_statement_list (t, list_p);
    }
}

/* Generate a byte array representing the contents of FILENAME.  The
   array is assigned a unique local symbol.  The array represents a
   compiled Java resource, which is accessed by the runtime using
   NAME.  */
void
compile_resource_file (const char *name, const char *filename)
{
  struct stat stat_buf;
  int fd;
  char *buffer;

  fd = open (filename, O_RDONLY | O_BINARY);
  if (fd < 0)
    {
      perror ("Failed to read resource file");
      return;
    }
  if (fstat (fd, &stat_buf) != 0
      || ! S_ISREG (stat_buf.st_mode))
    {
      perror ("Could not figure length of resource file");
      return;
    }
  buffer = xmalloc (strlen (name) + stat_buf.st_size);
  strcpy (buffer, name);
  read (fd, buffer + strlen (name), stat_buf.st_size);
  close (fd);

  compile_resource_data (name, buffer, stat_buf.st_size);
}

#include "gt-java-resource.h"