1// Copyright (c) 2012 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 "base/i18n/icu_util.h"
6
7#include "build/build_config.h"
8
9#if defined(OS_WIN)
10#include <windows.h>
11#endif
12
13#include <string>
14
15#include "base/files/file_path.h"
16#include "base/files/memory_mapped_file.h"
17#include "base/logging.h"
18#include "base/path_service.h"
19#include "base/strings/string_util.h"
20#include "base/strings/sys_string_conversions.h"
21#include "third_party/icu/source/common/unicode/putil.h"
22#include "third_party/icu/source/common/unicode/udata.h"
23
24#if defined(OS_MACOSX)
25#include "base/mac/foundation_util.h"
26#endif
27
28#define ICU_UTIL_DATA_FILE   0
29#define ICU_UTIL_DATA_SHARED 1
30#define ICU_UTIL_DATA_STATIC 2
31
32#if ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE
33#define ICU_UTIL_DATA_FILE_NAME "icudt" U_ICU_VERSION_SHORT "l.dat"
34#elif ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_SHARED
35#define ICU_UTIL_DATA_SYMBOL "icudt" U_ICU_VERSION_SHORT "_dat"
36#if defined(OS_WIN)
37#define ICU_UTIL_DATA_SHARED_MODULE_NAME "icudt.dll"
38#endif
39#endif
40
41namespace base {
42namespace i18n {
43
44bool InitializeICU() {
45#ifndef NDEBUG
46  // Assert that we are not called more than once.  Even though calling this
47  // function isn't harmful (ICU can handle it), being called twice probably
48  // indicates a programming error.
49  static bool called_once = false;
50  DCHECK(!called_once);
51  called_once = true;
52#endif
53
54#if (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_SHARED)
55  // We expect to find the ICU data module alongside the current module.
56  FilePath data_path;
57  PathService::Get(base::DIR_MODULE, &data_path);
58  data_path = data_path.AppendASCII(ICU_UTIL_DATA_SHARED_MODULE_NAME);
59
60  HMODULE module = LoadLibrary(data_path.value().c_str());
61  if (!module) {
62    DLOG(ERROR) << "Failed to load " << ICU_UTIL_DATA_SHARED_MODULE_NAME;
63    return false;
64  }
65
66  FARPROC addr = GetProcAddress(module, ICU_UTIL_DATA_SYMBOL);
67  if (!addr) {
68    DLOG(ERROR) << ICU_UTIL_DATA_SYMBOL << ": not found in "
69               << ICU_UTIL_DATA_SHARED_MODULE_NAME;
70    return false;
71  }
72
73  UErrorCode err = U_ZERO_ERROR;
74  udata_setCommonData(reinterpret_cast<void*>(addr), &err);
75  return err == U_ZERO_ERROR;
76#elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_STATIC)
77  // The ICU data is statically linked.
78  return true;
79#elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE)
80  // If the ICU data directory is set, ICU won't actually load the data until
81  // it is needed.  This can fail if the process is sandboxed at that time.
82  // Instead, we map the file in and hand off the data so the sandbox won't
83  // cause any problems.
84
85  // Chrome doesn't normally shut down ICU, so the mapped data shouldn't ever
86  // be released.
87  CR_DEFINE_STATIC_LOCAL(base::MemoryMappedFile, mapped_file, ());
88  if (!mapped_file.IsValid()) {
89    // Assume it is in the framework bundle's Resources directory.
90#if !defined(OS_MACOSX)
91    // For now, expect the data file to be alongside the executable.
92    // This is sufficient while we work on unit tests, but will eventually
93    // likely live in a data directory.
94    FilePath data_path;
95    bool path_ok = PathService::Get(base::DIR_EXE, &data_path);
96    DCHECK(path_ok);
97    data_path = data_path.AppendASCII(ICU_UTIL_DATA_FILE_NAME);
98#else
99    FilePath data_path =
100      base::mac::PathForFrameworkBundleResource(CFSTR(ICU_UTIL_DATA_FILE_NAME));
101    if (data_path.empty()) {
102      DLOG(ERROR) << ICU_UTIL_DATA_FILE_NAME << " not found in bundle";
103      return false;
104    }
105#endif  // OS check
106    if (!mapped_file.Initialize(data_path)) {
107      DLOG(ERROR) << "Couldn't mmap " << data_path.value();
108      return false;
109    }
110  }
111  UErrorCode err = U_ZERO_ERROR;
112  udata_setCommonData(const_cast<uint8*>(mapped_file.data()), &err);
113  return err == U_ZERO_ERROR;
114#endif
115}
116
117}  // namespace i18n
118}  // namespace base
119