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// Copyright (C) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "icing/helpers/icu/icu-data-file-helper.h"
#include <sys/mman.h>
#include <cstdint>
#include <memory>
#include "icing/text_classifier/lib3/utils/base/status.h"
#include "icing/absl_ports/canonical_errors.h"
#include "icing/file/filesystem.h"
#include "unicode/udata.h"
#include "unicode/utypes.h"
namespace icing {
namespace lib {
namespace icu_data_file_helper {
// ICU data file needs to be set up once, it can be shared between different
// Icing instances. Setting up the file too many times may cause out-of-memory
// segmentation fault errors.
bool has_set_up_icu_data_file = false;
libtextclassifier3::Status SetUpICUDataFile(
const std::string& icu_data_file_absolute_path) {
if (has_set_up_icu_data_file) {
return libtextclassifier3::Status::OK;
}
Filesystem filesystem;
int64_t file_size =
filesystem.GetFileSize(icu_data_file_absolute_path.c_str());
ScopedFd fd(filesystem.OpenForRead(icu_data_file_absolute_path.c_str()));
if (!fd.is_valid()) {
return absl_ports::InternalError("Unable to open file at provided path");
}
// TODO(samzheng): figure out why icing::MemoryMappedFile causes
// segmentation fault here.
const void* data =
mmap(nullptr, file_size, PROT_READ, MAP_PRIVATE, fd.get(), 0);
UErrorCode status = U_ZERO_ERROR;
udata_setCommonData(data, &status);
if (U_FAILURE(status)) {
return absl_ports::InternalError(
"Failed to set up ICU data, please check if you have the data file at "
"the given path.");
}
has_set_up_icu_data_file = true;
return libtextclassifier3::Status::OK;
}
} // namespace icu_data_file_helper
} // namespace lib
} // namespace icing
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