gcc/java/resource.c

   1 /* Functions related to building resource files.
   2    Copyright (C) 1996-2016 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.
  19
  20 Java and all Java-based marks are trademarks or registered trademarks
  21 of Sun Microsystems, Inc. in the United States and other countries.
  22 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  23
  24 #include "config.h"
  25 #include "system.h"
  26 #include "coretypes.h"
  27 #include "tm.h"
  28 #include "tree.h"
  29 #include "stringpool.h"
  30 #include "cgraph.h"
  31 #include "fold-const.h"
  32 #include "stor-layout.h"
  33 #include "java-tree.h"
  34 #include "toplev.h"
  35 #include "tree-iterator.h"
  36
  37 /* A list of all the resources files.  */
  38 static GTY(()) vec<tree, va_gc> *resources;
  39
  40 void
  41 compile_resource_data (const char *name, const char *buffer, int length)
  42 {
  43   tree rtype, field = NULL_TREE, data_type, rinit, data, decl;
  44   vec<constructor_elt, va_gc> *v = NULL;
  45
  46   data_type = build_prim_array_type (unsigned_byte_type_node,
  47                                      strlen (name) + length);
  48   rtype = make_node (RECORD_TYPE);
  49   PUSH_FIELD (input_location,
  50               rtype, field, "name_length", unsigned_int_type_node);
  51   PUSH_FIELD (input_location,
  52               rtype, field, "resource_length", unsigned_int_type_node);
  53   PUSH_FIELD (input_location, rtype, field, "data", data_type);
  54   FINISH_RECORD (rtype);
  55   START_RECORD_CONSTRUCTOR (v, rtype);
  56   PUSH_FIELD_VALUE (v, "name_length",
  57                     build_int_cst (NULL_TREE, strlen (name)));
  58   PUSH_FIELD_VALUE (v, "resource_length",
  59                     build_int_cst (NULL_TREE, length));
  60   data = build_string (strlen(name) + length, buffer);
  61   TREE_TYPE (data) = data_type;
  62   PUSH_FIELD_VALUE (v, "data", data);
  63   FINISH_RECORD_CONSTRUCTOR (rinit, v, rtype);
  64   TREE_CONSTANT (rinit) = 1;
  65
  66   decl = build_decl (input_location,
  67                      VAR_DECL, java_mangle_resource_name (name), rtype);
  68   TREE_STATIC (decl) = 1;
  69   TREE_PUBLIC (decl) = 1;
  70   java_hide_decl (decl);
  71   DECL_ARTIFICIAL (decl) = 1;
  72   DECL_IGNORED_P (decl) = 1;
  73   TREE_READONLY (decl) = 1;
  74   TREE_THIS_VOLATILE (decl) = 0;
  75   DECL_INITIAL (decl) = rinit;
  76   layout_decl (decl, 0);
  77   pushdecl (decl);
  78   rest_of_decl_compilation (decl, global_bindings_p (), 0);
  79   varpool_node::finalize_decl (decl);
  80
  81   vec_safe_push (resources, decl);
  82 }
  83
  84 void
  85 write_resource_constructor (tree *list_p)
  86 {
  87   tree decl, t, register_resource_fn;
  88   unsigned ix;
  89
  90   if (resources == NULL)
  91     return;
  92
  93   t = build_function_type_list (void_type_node, ptr_type_node, NULL);
  94   t = build_decl (input_location,
  95                   FUNCTION_DECL, get_identifier ("_Jv_RegisterResource"), t);
  96   TREE_PUBLIC (t) = 1;
  97   DECL_EXTERNAL (t) = 1;
  98   register_resource_fn = t;
  99
 100   /* Write out entries in the same order in which they were defined.  */
 101   FOR_EACH_VEC_ELT (*resources, ix, decl)
 102     {
 103       t = build_fold_addr_expr (decl);
 104       t = build_call_expr (register_resource_fn, 1, t);
 105       append_to_statement_list (t, list_p);
 106     }
 107 }
 108
 109 /* Generate a byte array representing the contents of FILENAME.  The
 110    array is assigned a unique local symbol.  The array represents a
 111    compiled Java resource, which is accessed by the runtime using
 112    NAME.  */
 113 void
 114 compile_resource_file (const char *name, const char *filename)
 115 {
 116   struct stat stat_buf;
 117   int fd;
 118   char *buffer;
 119
 120   fd = open (filename, O_RDONLY | O_BINARY);
 121   if (fd < 0)
 122     {
 123       perror ("Failed to read resource file");
 124       return;
 125     }
 126   if (fstat (fd, &stat_buf) != 0
 127       || ! S_ISREG (stat_buf.st_mode))
 128     {
 129       perror ("Could not figure length of resource file");
 130       return;
 131     }
 132   buffer = XNEWVEC (char, strlen (name) + stat_buf.st_size);
 133   strcpy (buffer, name);
 134   read (fd, buffer + strlen (name), stat_buf.st_size);
 135   close (fd);
 136
 137   compile_resource_data (name, buffer, stat_buf.st_size);
 138 }
 139
 140 #include "gt-java-resource.h"