gcc/java/resource.c

   1 /* Functions related to building resource files.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.
  21
  22 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 #include "config.h"
  27 #include "system.h"
  28 #include "coretypes.h"
  29 #include "tm.h"
  30 #include "tree.h"
  31 #include "rtl.h"
  32 #include "flags.h"
  33 #include "java-tree.h"
  34 #include "jcf.h"
  35 #include "obstack.h"
  36 #include "toplev.h"
  37 #include "output.h"
  38 #include "parse.h"
  39 #include "function.h"
  40 #include "ggc.h"
  41 #include "stdio.h"
  42 #include "target.h"
  43 #include "expr.h"
  44
  45 /* DOS brain-damage */
  46 #ifndef O_BINARY
  47 #define O_BINARY 0 /* MS-DOS brain-damage */
  48 #endif
  49
  50 /* A list of all the resources files.  */
  51 static GTY(()) tree resources = NULL;
  52
  53 /* Function used to register resources.  */
  54 static GTY(()) rtx registerResource_libfunc;
  55
  56 /* Count of all the resources compiled in this invocation.  */
  57 static int Jr_count = 0;
  58
  59 void
  60 compile_resource_data (const char *name, const char *buffer, int length)
  61 {
  62   tree rtype, field = NULL_TREE, data_type, rinit, data, decl;
  63   char buf[60];
  64
  65   data_type = build_prim_array_type (unsigned_byte_type_node,
  66                                      strlen (name) + length);
  67   rtype = make_node (RECORD_TYPE);
  68   PUSH_FIELD (rtype, field, "name_length", unsigned_int_type_node);
  69   PUSH_FIELD (rtype, field, "resource_length", unsigned_int_type_node);
  70   PUSH_FIELD (rtype, field, "data", data_type);
  71   FINISH_RECORD (rtype);
  72   START_RECORD_CONSTRUCTOR (rinit, rtype);
  73   PUSH_FIELD_VALUE (rinit, "name_length",
  74                     build_int_2 (strlen (name), 0));
  75   PUSH_FIELD_VALUE (rinit, "resource_length",
  76                     build_int_2 (length, 0));
  77   data = build_string (strlen(name) + length, buffer);
  78   TREE_TYPE (data) = data_type;
  79   PUSH_FIELD_VALUE (rinit, "data", data);
  80   FINISH_RECORD_CONSTRUCTOR (rinit);
  81   TREE_CONSTANT (rinit) = 1;
  82
  83   /* Generate a unique-enough identifier.  */
  84   sprintf (buf, "_Jr%d", ++Jr_count);
  85
  86   decl = build_decl (VAR_DECL, get_identifier (buf), rtype);
  87   TREE_STATIC (decl) = 1;
  88   DECL_ARTIFICIAL (decl) = 1;
  89   DECL_IGNORED_P (decl) = 1;
  90   TREE_READONLY (decl) = 1;
  91   TREE_THIS_VOLATILE (decl) = 0;
  92   DECL_INITIAL (decl) = rinit;
  93   layout_decl (decl, 0);
  94   pushdecl (decl);
  95   rest_of_decl_compilation (decl, (char*) 0, global_bindings_p (), 0);
  96   make_decl_rtl (decl, (char*) 0);
  97   assemble_variable (decl, 1, 0, 0);
  98
  99   resources = tree_cons (NULL_TREE, decl, resources);
 100 }
 101
 102 void
 103 write_resource_constructor (void)
 104 {
 105   tree init_name, init_type, init_decl;
 106   tree iter;
 107   location_t saved_loc = input_location;
 108
 109   /* Only do work if required.  */
 110   if (resources == NULL_TREE)
 111     return;
 112
 113   init_name = get_file_function_name ('I');
 114   init_type = build_function_type (void_type_node, end_params_node);
 115
 116   init_decl = build_decl (FUNCTION_DECL, init_name, init_type);
 117   DECL_SOURCE_LINE (init_decl) = 0;
 118   SET_DECL_ASSEMBLER_NAME (init_decl, init_name);
 119   TREE_STATIC (init_decl) = 1;
 120   current_function_decl = init_decl;
 121   DECL_RESULT (init_decl) = build_decl (RESULT_DECL,
 122                                         NULL_TREE, void_type_node);
 123
 124   /* It can be a static function as long as collect2 does not have
 125      to scan the object file to find its ctor/dtor routine.  */
 126   TREE_PUBLIC (init_decl) = ! targetm.have_ctors_dtors;
 127
 128   pushlevel (0);
 129   make_decl_rtl (init_decl, NULL);
 130   init_function_start (init_decl);
 131   expand_function_start (init_decl, 0);
 132
 133   /* Write out entries in the same order in which they were defined.  */
 134   for (iter = nreverse (resources); iter != NULL_TREE;
 135        iter = TREE_CHAIN (iter))
 136     {
 137       emit_library_call (registerResource_libfunc, 0, VOIDmode, 1,
 138                          expand_expr (build_address_of (TREE_VALUE (iter)),
 139                                       0, Pmode, 0),
 140                          Pmode);
 141     }
 142
 143   input_location = DECL_SOURCE_LOCATION (init_decl);
 144   expand_function_end ();
 145   poplevel (1, 0, 1);
 146   {
 147     /* Force generation, even with -O3 or deeper.  Gross hack.
 148        FIXME.  */
 149     int saved_flag = flag_inline_functions;
 150     flag_inline_functions = 0;
 151     rest_of_compilation (init_decl);
 152     flag_inline_functions = saved_flag;
 153   }
 154   current_function_decl = NULL_TREE;
 155   (* targetm.asm_out.constructor) (XEXP (DECL_RTL (init_decl), 0),
 156                                    DEFAULT_INIT_PRIORITY);
 157   input_location = saved_loc;
 158 }
 159
 160 /* Generate a byte array representing the contents of FILENAME.  The
 161    array is assigned a unique local symbol.  The array represents a
 162    compiled Java resource, which is accessed by the runtime using
 163    NAME.  */
 164 void
 165 compile_resource_file (const char *name, const char *filename)
 166 {
 167   struct stat stat_buf;
 168   int fd;
 169   char *buffer;
 170
 171   fd = open (filename, O_RDONLY | O_BINARY);
 172   if (fd < 0)
 173     {
 174       perror ("Failed to read resource file");
 175       return;
 176     }
 177   if (fstat (fd, &stat_buf) != 0
 178       || ! S_ISREG (stat_buf.st_mode))
 179     {
 180       perror ("Could not figure length of resource file");
 181       return;
 182     }
 183   buffer = xmalloc (strlen (name) + stat_buf.st_size);
 184   strcpy (buffer, name);
 185   read (fd, buffer + strlen (name), stat_buf.st_size);
 186   close (fd);
 187
 188   compile_resource_data (name, buffer, stat_buf.st_size);
 189   write_resource_constructor ();
 190 }
 191
 192 void
 193 init_resource_processing (void)
 194 {
 195   registerResource_libfunc =
 196     gen_rtx_SYMBOL_REF (Pmode, "_Jv_RegisterResource");
 197 }
 198
 199 #include "gt-java-resource.h"