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      1 // Copyright (c) 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 "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/file_path.h"
     16 #include "base/file_util.h"
     17 #include "base/logging.h"
     18 #include "base/path_service.h"
     19 #include "base/string_util.h"
     20 #include "base/sys_string_conversions.h"
     21 #include "unicode/putil.h"
     22 #include "unicode/udata.h"
     23 
     24 #define ICU_UTIL_DATA_FILE   0
     25 #define ICU_UTIL_DATA_SHARED 1
     26 #define ICU_UTIL_DATA_STATIC 2
     27 
     28 #ifndef ICU_UTIL_DATA_IMPL
     29 
     30 #if defined(OS_WIN)
     31 #define ICU_UTIL_DATA_IMPL ICU_UTIL_DATA_SHARED
     32 #elif defined(OS_MACOSX)
     33 #define ICU_UTIL_DATA_IMPL ICU_UTIL_DATA_STATIC
     34 #elif defined(OS_POSIX)
     35 #define ICU_UTIL_DATA_IMPL ICU_UTIL_DATA_FILE
     36 #endif
     37 
     38 #endif  // ICU_UTIL_DATA_IMPL
     39 
     40 #if defined(OS_WIN)
     41 #define ICU_UTIL_DATA_SYMBOL "icudt" U_ICU_VERSION_SHORT "_dat"
     42 #define ICU_UTIL_DATA_SHARED_MODULE_NAME "icudt" U_ICU_VERSION_SHORT ".dll"
     43 #endif
     44 
     45 namespace icu_util {
     46 
     47 bool Initialize() {
     48 #ifndef NDEBUG
     49   // Assert that we are not called more than once.  Even though calling this
     50   // function isn't harmful (ICU can handle it), being called twice probably
     51   // indicates a programming error.
     52   static bool called_once = false;
     53   DCHECK(!called_once);
     54   called_once = true;
     55 #endif
     56 
     57 #if (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_SHARED)
     58   // We expect to find the ICU data module alongside the current module.
     59   FilePath data_path;
     60   PathService::Get(base::DIR_MODULE, &data_path);
     61   data_path = data_path.AppendASCII(ICU_UTIL_DATA_SHARED_MODULE_NAME);
     62 
     63   HMODULE module = LoadLibrary(data_path.value().c_str());
     64   if (!module) {
     65     LOG(ERROR) << "Failed to load " << ICU_UTIL_DATA_SHARED_MODULE_NAME;
     66     return false;
     67   }
     68 
     69   FARPROC addr = GetProcAddress(module, ICU_UTIL_DATA_SYMBOL);
     70   if (!addr) {
     71     LOG(ERROR) << ICU_UTIL_DATA_SYMBOL << ": not found in "
     72                << ICU_UTIL_DATA_SHARED_MODULE_NAME;
     73     return false;
     74   }
     75 
     76   UErrorCode err = U_ZERO_ERROR;
     77   udata_setCommonData(reinterpret_cast<void*>(addr), &err);
     78   return err == U_ZERO_ERROR;
     79 #elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_STATIC)
     80   // Mac bundles the ICU data in.
     81   return true;
     82 #elif (ICU_UTIL_DATA_IMPL == ICU_UTIL_DATA_FILE)
     83   // For now, expect the data file to be alongside the executable.
     84   // This is sufficient while we work on unit tests, but will eventually
     85   // likely live in a data directory.
     86   FilePath data_path;
     87   bool path_ok = PathService::Get(base::DIR_EXE, &data_path);
     88   DCHECK(path_ok);
     89   u_setDataDirectory(data_path.value().c_str());
     90   // Only look for the packaged data file;
     91   // the default behavior is to look for individual files.
     92   UErrorCode err = U_ZERO_ERROR;
     93   udata_setFileAccess(UDATA_ONLY_PACKAGES, &err);
     94   return err == U_ZERO_ERROR;
     95 #endif
     96 }
     97 
     98 }  // namespace icu_util
     99