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Feature/no libdeflate (#360)

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remove libdeflate code in gzip codec
This commit is contained in:
Benjamin Sergeant
2022-02-10 20:47:32 -08:00
committed by GitHub
parent db7057de69
commit 7711cb1ae7
2 changed files with 0 additions and 71 deletions
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63
ixwebsocket/IXGzipCodec.cpp
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@@ -14,53 +14,12 @@
#include <zlib.h>
#endif
#ifdef IXWEBSOCKET_USE_DEFLATE
#include <libdeflate.h>
#endif
namespace ix
{
std::string gzipCompress(const std::string& str)
{
#ifndef IXWEBSOCKET_USE_ZLIB
return std::string();
#else
#ifdef IXWEBSOCKET_USE_DEFLATE
int compressionLevel = 6;
struct libdeflate_compressor* compressor;
compressor = libdeflate_alloc_compressor(compressionLevel);
const void* uncompressed_data = str.data();
size_t uncompressed_size = str.size();
void* compressed_data;
size_t actual_compressed_size;
size_t max_compressed_size;
max_compressed_size = libdeflate_gzip_compress_bound(compressor, uncompressed_size);
compressed_data = malloc(max_compressed_size);
if (compressed_data == NULL)
{
return std::string();
}
actual_compressed_size = libdeflate_gzip_compress(
compressor, uncompressed_data, uncompressed_size, compressed_data, max_compressed_size);
libdeflate_free_compressor(compressor);
if (actual_compressed_size == 0)
{
free(compressed_data);
return std::string();
}
std::string out;
out.assign(reinterpret_cast<char*>(compressed_data), actual_compressed_size);
free(compressed_data);
return out;
#else
z_stream zs; // z_stream is zlib's control structure
memset(&zs, 0, sizeof(zs));
@@ -101,7 +60,6 @@ namespace ix
deflateEnd(&zs);
return outstring;
#endif // IXWEBSOCKET_USE_DEFLATE
#endif // IXWEBSOCKET_USE_ZLIB
}
@@ -117,26 +75,6 @@ namespace ix
{
#ifndef IXWEBSOCKET_USE_ZLIB
return false;
#else
#ifdef IXWEBSOCKET_USE_DEFLATE
struct libdeflate_decompressor* decompressor;
decompressor = libdeflate_alloc_decompressor();
const void* compressed_data = in.data();
size_t compressed_size = in.size();
// Retrieve uncompressed size from the trailer of the gziped data
const uint8_t* ptr = reinterpret_cast<const uint8_t*>(&in.front());
auto uncompressed_size = loadDecompressedGzipSize(&ptr[compressed_size - 4]);
// Use it to redimension our output buffer
out.resize(uncompressed_size);
libdeflate_result result = libdeflate_gzip_decompress(
decompressor, compressed_data, compressed_size, &out.front(), uncompressed_size, NULL);
libdeflate_free_decompressor(decompressor);
return result == LIBDEFLATE_SUCCESS;
#else
z_stream inflateState;
memset(&inflateState, 0, sizeof(inflateState));
@@ -177,7 +115,6 @@ namespace ix
inflateEnd(&inflateState);
return true;
#endif // IXWEBSOCKET_USE_DEFLATE
#endif // IXWEBSOCKET_USE_ZLIB
}
} // namespace ix