chrome/installer/mini_installer/pe_resource.cc

   1 // Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/installer/mini_installer/pe_resource.h"
   6
   7 PEResource::PEResource(HRSRC resource, HMODULE module)
   8     : resource_(resource), module_(module) {
   9 }
  10
  11 PEResource::PEResource(const wchar_t* name, const wchar_t* type, HMODULE module)
  12     : resource_(NULL), module_(module) {
  13   resource_ = ::FindResource(module, name, type);
  14 }
  15
  16 bool PEResource::IsValid() {
  17   return (NULL != resource_);
  18 }
  19
  20 size_t PEResource::Size() {
  21   return ::SizeofResource(module_, resource_);
  22 }
  23
  24 bool PEResource::WriteToDisk(const wchar_t* full_path) {
  25   // Resource handles are not real HGLOBALs so do not attempt to close them.
  26   // Windows frees them whenever there is memory pressure.
  27   HGLOBAL data_handle = ::LoadResource(module_, resource_);
  28   if (NULL == data_handle) {
  29     return false;
  30   }
  31   void* data = ::LockResource(data_handle);
  32   if (NULL == data) {
  33     return false;
  34   }
  35   size_t resource_size = Size();
  36   HANDLE out_file = ::CreateFile(full_path, GENERIC_WRITE, 0, NULL,
  37                                   CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
  38   if (INVALID_HANDLE_VALUE == out_file) {
  39     return false;
  40   }
  41   DWORD written = 0;
  42   if (!::WriteFile(out_file, data, static_cast<DWORD>(resource_size),
  43                    &written, NULL)) {
  44       ::CloseHandle(out_file);
  45       return false;
  46   }
  47   return ::CloseHandle(out_file) ? true : false;
  48 }