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common: Add more robust ZSTD handling. (#7071)

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Steveice10 2023-10-15 14:08:29 -07:00 • committed by GitHub
parent 07839fb3ce
commit 4c59443ed2
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3 changed files with 35 additions and 8 deletions
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36
src/common/zstd_compression.cpp
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@ -11,20 +11,25 @@ namespace Common::Compression {
std::vector<u8> CompressDataZSTD(std::span<const u8> source, s32 compression_level) {
compression_level = std::clamp(compression_level, ZSTD_minCLevel(), ZSTD_maxCLevel());
const std::size_t max_compressed_size = ZSTD_compressBound(source.size());
std::vector<u8> compressed(max_compressed_size);
if (ZSTD_isError(max_compressed_size)) {
LOG_ERROR(Common, "Error determining ZSTD maximum compressed size: {} ({})",
ZSTD_getErrorName(max_compressed_size), max_compressed_size);
return {};
}
std::vector<u8> compressed(max_compressed_size);
const std::size_t compressed_size = ZSTD_compress(
compressed.data(), compressed.size(), source.data(), source.size(), compression_level);
if (ZSTD_isError(compressed_size)) {
// Compression failed
LOG_ERROR(Common, "Error compressing ZSTD data: {} ({})",
ZSTD_getErrorName(compressed_size), compressed_size);
return {};
}
compressed.resize(compressed_size);
return compressed;
}
@ -35,15 +40,32 @@ std::vector<u8> CompressDataZSTDDefault(std::span<const u8> source) {
std::vector<u8> DecompressDataZSTD(std::span<const u8> compressed) {
const std::size_t decompressed_size =
ZSTD_getFrameContentSize(compressed.data(), compressed.size());
std::vector<u8> decompressed(decompressed_size);
if (decompressed_size == ZSTD_CONTENTSIZE_UNKNOWN) {
LOG_ERROR(Common, "ZSTD decompressed size could not be determined.");
return {};
}
if (decompressed_size == ZSTD_CONTENTSIZE_ERROR || ZSTD_isError(decompressed_size)) {
LOG_ERROR(Common, "Error determining ZSTD decompressed size: {} ({})",
ZSTD_getErrorName(decompressed_size), decompressed_size);
return {};
}
std::vector<u8> decompressed(decompressed_size);
const std::size_t uncompressed_result_size = ZSTD_decompress(
decompressed.data(), decompressed.size(), compressed.data(), compressed.size());
if (decompressed_size != uncompressed_result_size || ZSTD_isError(uncompressed_result_size)) {
// Decompression failed
if (decompressed_size != uncompressed_result_size) {
LOG_ERROR(Common, "ZSTD decompression expected {} bytes, got {}", decompressed_size,
uncompressed_result_size);
return {};
}
if (ZSTD_isError(uncompressed_result_size)) {
LOG_ERROR(Common, "Error decompressing ZSTD data: {} ({})",
ZSTD_getErrorName(uncompressed_result_size), uncompressed_result_size);
return {};
}
return decompressed;
}