mirror of
https://github.com/ton-blockchain/ton
synced 2025-02-13 19:52:18 +00:00
49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
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/*
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This file is part of TON Blockchain Library.
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TON Blockchain Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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TON Blockchain Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with TON Blockchain Library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "td/utils/buffer.h"
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#include "td/utils/misc.h"
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#include <lz4.h>
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namespace td {
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td::BufferSlice lz4_compress(td::Slice data) {
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int size = narrow_cast<int>(data.size());
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int buf_size = LZ4_compressBound(size);
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td::BufferSlice compressed(buf_size);
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int compressed_size = LZ4_compress_default(data.data(), compressed.data(), size, buf_size);
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CHECK(compressed_size > 0);
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return td::BufferSlice{compressed.as_slice().substr(0, compressed_size)};
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}
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td::Result<td::BufferSlice> lz4_decompress(td::Slice data, int max_decompressed_size) {
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TRY_RESULT(size, narrow_cast_safe<int>(data.size()));
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if (max_decompressed_size < 0) {
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return td::Status::Error("invalid max_decompressed_size");
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}
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td::BufferSlice decompressed(max_decompressed_size);
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int result = LZ4_decompress_safe(data.data(), decompressed.data(), size, max_decompressed_size);
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if (result < 0) {
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return td::Status::Error(PSTRING() << "lz4 decompression failed, error code: " << result);
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}
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if (result == max_decompressed_size) {
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return decompressed;
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}
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return td::BufferSlice{decompressed.as_slice().substr(0, result)};
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}
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} // namespace td
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