pe_resource.cc revision 5821806d5e7f356e8fa4b058a389a808ea183019 
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
7PEResource::PEResource(HRSRC resource, HMODULE module)
8    : resource_(resource), module_(module) {
9}
10
11PEResource::PEResource(const wchar_t* name, const wchar_t* type, HMODULE module)
12    : resource_(NULL), module_(module) {
13  resource_ = ::FindResource(module, name, type);
14}
15
16bool PEResource::IsValid() {
17  return (NULL != resource_);
18}
19
20size_t PEResource::Size() {
21  return ::SizeofResource(module_, resource_);
22}
23
24bool 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}
49