120 lines
3.2 KiB
C++
120 lines
3.2 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style license that can be
|
|
// found in the LICENSE file.
|
|
|
|
#include "flutter/fml/icu_util.h"
|
|
|
|
#include <memory>
|
|
#include <mutex>
|
|
|
|
#include "flutter/fml/build_config.h"
|
|
#include "flutter/fml/logging.h"
|
|
#include "flutter/fml/mapping.h"
|
|
#include "flutter/fml/native_library.h"
|
|
#include "flutter/fml/paths.h"
|
|
#include "third_party/icu/source/common/unicode/udata.h"
|
|
|
|
namespace fml {
|
|
namespace icu {
|
|
|
|
class ICUContext {
|
|
public:
|
|
explicit ICUContext(const std::string& icu_data_path) : valid_(false) {
|
|
valid_ = SetupMapping(icu_data_path) && SetupICU();
|
|
}
|
|
|
|
explicit ICUContext(std::unique_ptr<Mapping> mapping)
|
|
: mapping_(std::move(mapping)) {
|
|
valid_ = SetupICU();
|
|
}
|
|
|
|
~ICUContext() = default;
|
|
|
|
bool SetupMapping(const std::string& icu_data_path) {
|
|
// Check if the path exists and it readable directly.
|
|
auto fd =
|
|
fml::OpenFile(icu_data_path.c_str(), false, fml::FilePermission::kRead);
|
|
|
|
// Check the path relative to the current executable.
|
|
if (!fd.is_valid()) {
|
|
auto directory = fml::paths::GetExecutableDirectoryPath();
|
|
|
|
if (!directory.first) {
|
|
return false;
|
|
}
|
|
|
|
std::string path_relative_to_executable =
|
|
paths::JoinPaths({directory.second, icu_data_path});
|
|
|
|
fd = fml::OpenFile(path_relative_to_executable.c_str(), false,
|
|
fml::FilePermission::kRead);
|
|
}
|
|
|
|
if (!fd.is_valid()) {
|
|
return false;
|
|
}
|
|
|
|
std::initializer_list<FileMapping::Protection> protection = {
|
|
fml::FileMapping::Protection::kRead};
|
|
|
|
auto file_mapping = std::make_unique<FileMapping>(fd, protection);
|
|
|
|
if (file_mapping->GetSize() != 0) {
|
|
mapping_ = std::move(file_mapping);
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
bool SetupICU() {
|
|
if (GetSize() == 0) {
|
|
return false;
|
|
}
|
|
|
|
UErrorCode err_code = U_ZERO_ERROR;
|
|
udata_setCommonData(GetMapping(), &err_code);
|
|
return (err_code == U_ZERO_ERROR);
|
|
}
|
|
|
|
const uint8_t* GetMapping() const {
|
|
return mapping_ ? mapping_->GetMapping() : nullptr;
|
|
}
|
|
|
|
size_t GetSize() const { return mapping_ ? mapping_->GetSize() : 0; }
|
|
|
|
bool IsValid() const { return valid_; }
|
|
|
|
private:
|
|
bool valid_;
|
|
std::unique_ptr<Mapping> mapping_;
|
|
|
|
FML_DISALLOW_COPY_AND_ASSIGN(ICUContext);
|
|
};
|
|
|
|
void InitializeICUOnce(const std::string& icu_data_path) {
|
|
static ICUContext* context = new ICUContext(icu_data_path);
|
|
FML_CHECK(context->IsValid())
|
|
<< "Must be able to initialize the ICU context. Tried: " << icu_data_path;
|
|
}
|
|
|
|
std::once_flag g_icu_init_flag;
|
|
void InitializeICU(const std::string& icu_data_path) {
|
|
std::call_once(g_icu_init_flag,
|
|
[&icu_data_path]() { InitializeICUOnce(icu_data_path); });
|
|
}
|
|
|
|
void InitializeICUFromMappingOnce(std::unique_ptr<Mapping> mapping) {
|
|
static ICUContext* context = new ICUContext(std::move(mapping));
|
|
FML_CHECK(context->IsValid())
|
|
<< "Unable to initialize the ICU context from a mapping.";
|
|
}
|
|
|
|
void InitializeICUFromMapping(std::unique_ptr<Mapping> mapping) {
|
|
std::call_once(g_icu_init_flag, [mapping = std::move(mapping)]() mutable {
|
|
InitializeICUFromMappingOnce(std::move(mapping));
|
|
});
|
|
}
|
|
|
|
} // namespace icu
|
|
} // namespace fml
|