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/*
* Copyright 2021 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.
*/
// Low-level array reading function using std::ifstream.
#ifndef LYRA_CODEC_SPARSE_MATMUL_LAYERS_READ_ARRAY_IFSTREAM_H_
#define LYRA_CODEC_SPARSE_MATMUL_LAYERS_READ_ARRAY_IFSTREAM_H_
#include <cstdint>
#include <fstream>
#include <sstream>
#include <string>
#include "absl/status/status.h"
#include "absl/strings/substitute.h"
#include "include/ghc/filesystem.hpp"
namespace csrblocksparse {
namespace detail {
template <typename T>
absl::Status ReadArrayIfstream(const std::string& file_name,
const std::string& path, std::vector<T>* array,
int64_t* length) {
ghc::filesystem::path complete_path(path);
complete_path /= file_name;
std::ifstream in_stream(complete_path.u8string(), std::ios::binary);
if (!in_stream.is_open()) {
return absl::UnknownError(
absl::Substitute("Error opening $0", complete_path.string()));
}
std::stringstream buffer;
buffer << in_stream.rdbuf();
if (buffer.str().empty()) {
LOG(ERROR) << "File " << complete_path << " was empty.";
return absl::UnknownError(
absl::Substitute("File $0 was empty", complete_path.string()));
}
std::string contents = buffer.str();
*length = contents.length();
int64_t elem = (*length + sizeof(T) - 1) / sizeof(T);
array->resize(elem);
std::move(contents.begin(), contents.end(),
reinterpret_cast<char*>(array->data()));
return absl::OkStatus();
}
} // namespace detail
} // namespace csrblocksparse
#endif // LYRA_CODEC_SPARSE_MATMUL_LAYERS_READ_ARRAY_IFSTREAM_H_
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