gcc/java/resource.c

   1 /* Functions related to building resource files.
   2    Copyright (C) 1996-2013 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 "tree.h"
  28 #include "java-tree.h"
  29 #include "jcf.h"
  30 #include "diagnostic-core.h"
  31 #include "toplev.h"
  32 #include "parse.h"
  33 #include "function.h"
  34 #include "ggc.h"
  35 #include "tree-iterator.h"
  36 #include "cgraph.h"
  37
  38 /* A list of all the resources files.  */
  39 static GTY(()) vec<tree, va_gc> *resources;
  40
  41 void
  42 compile_resource_data (const char *name, const char *buffer, int length)
  43 {
  44   tree rtype, field = NULL_TREE, data_type, rinit, data, decl;
  45   vec<constructor_elt, va_gc> *v = NULL;
  46
  47   data_type = build_prim_array_type (unsigned_byte_type_node,
  48                                      strlen (name) + length);
  49   rtype = make_node (RECORD_TYPE);
  50   PUSH_FIELD (input_location,
  51               rtype, field, "name_length", unsigned_int_type_node);
  52   PUSH_FIELD (input_location,
  53               rtype, field, "resource_length", unsigned_int_type_node);
  54   PUSH_FIELD (input_location, rtype, field, "data", data_type);
  55   FINISH_RECORD (rtype);
  56   START_RECORD_CONSTRUCTOR (v, rtype);
  57   PUSH_FIELD_VALUE (v, "name_length",
  58                     build_int_cst (NULL_TREE, strlen (name)));
  59   PUSH_FIELD_VALUE (v, "resource_length",
  60                     build_int_cst (NULL_TREE, length));
  61   data = build_string (strlen(name) + length, buffer);
  62   TREE_TYPE (data) = data_type;
  63   PUSH_FIELD_VALUE (v, "data", data);
  64   FINISH_RECORD_CONSTRUCTOR (rinit, v, rtype);
  65   TREE_CONSTANT (rinit) = 1;
  66
  67   decl = build_decl (input_location,
  68                      VAR_DECL, java_mangle_resource_name (name), rtype);
  69   TREE_STATIC (decl) = 1;
  70   TREE_PUBLIC (decl) = 1;
  71   java_hide_decl (decl);
  72   DECL_ARTIFICIAL (decl) = 1;
  73   DECL_IGNORED_P (decl) = 1;
  74   TREE_READONLY (decl) = 1;
  75   TREE_THIS_VOLATILE (decl) = 0;
  76   DECL_INITIAL (decl) = rinit;
  77   layout_decl (decl, 0);
  78   pushdecl (decl);
  79   rest_of_decl_compilation (decl, global_bindings_p (), 0);
  80   varpool_finalize_decl (decl);
  81
  82   vec_safe_push (resources, decl);
  83 }
  84
  85 void
  86 write_resource_constructor (tree *list_p)
  87 {
  88   tree decl, t, register_resource_fn;
  89   unsigned ix;
  90
  91   if (resources == NULL)
  92     return;
  93
  94   t = build_function_type_list (void_type_node, ptr_type_node, NULL);
  95   t = build_decl (input_location,
  96                   FUNCTION_DECL, get_identifier ("_Jv_RegisterResource"), t);
  97   TREE_PUBLIC (t) = 1;
  98   DECL_EXTERNAL (t) = 1;
  99   register_resource_fn = t;
 100
 101   /* Write out entries in the same order in which they were defined.  */
 102   FOR_EACH_VEC_ELT (*resources, ix, decl)
 103     {
 104       t = build_fold_addr_expr (decl);
 105       t = build_call_expr (register_resource_fn, 1, t);
 106       append_to_statement_list (t, list_p);
 107     }
 108 }
 109
 110 /* Generate a byte array representing the contents of FILENAME.  The
 111    array is assigned a unique local symbol.  The array represents a
 112    compiled Java resource, which is accessed by the runtime using
 113    NAME.  */
 114 void
 115 compile_resource_file (const char *name, const char *filename)
 116 {
 117   struct stat stat_buf;
 118   int fd;
 119   char *buffer;
 120
 121   fd = open (filename, O_RDONLY | O_BINARY);
 122   if (fd < 0)
 123     {
 124       perror ("Failed to read resource file");
 125       return;
 126     }
 127   if (fstat (fd, &stat_buf) != 0
 128       || ! S_ISREG (stat_buf.st_mode))
 129     {
 130       perror ("Could not figure length of resource file");
 131       return;
 132     }
 133   buffer = XNEWVEC (char, strlen (name) + stat_buf.st_size);
 134   strcpy (buffer, name);
 135   read (fd, buffer + strlen (name), stat_buf.st_size);
 136   close (fd);
 137
 138   compile_resource_data (name, buffer, stat_buf.st_size);
 139 }
 140
 141 #include "gt-java-resource.h"