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Add support for WUHB file format (#1190)

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goeiecool9999 2024-05-05 02:35:01 +02:00 • committed by GitHub
parent f28043e0e9
commit dc480ac00b
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GPG key ID: B5690EEEBB952194
15 changed files with 617 additions and 3 deletions
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41
src/util/helpers/helpers.cpp
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@ -11,6 +11,8 @@
#include <boost/random/uniform_int.hpp>
#include <zlib.h>
#if BOOST_OS_WINDOWS
#include <TlHelp32.h>
@ -437,3 +439,42 @@ std::string GenerateRandomString(const size_t length, const std::string_view cha
return result;
}
std::optional<std::vector<uint8>> zlibDecompress(const std::vector<uint8>& compressed, size_t sizeHint)
{
int err;
std::vector<uint8> decompressed;
size_t outWritten = 0;
size_t bytesPerIteration = sizeHint;
z_stream stream;
stream.zalloc = Z_NULL;
stream.zfree = Z_NULL;
stream.opaque = Z_NULL;
stream.avail_in = compressed.size();
stream.next_in = (Bytef*)compressed.data();
err = inflateInit2(&stream, 32); // 32 is a zlib magic value to enable header detection
if (err != Z_OK)
return {};
do
{
decompressed.resize(decompressed.size() + bytesPerIteration);
const auto availBefore = decompressed.size() - outWritten;
stream.avail_out = availBefore;
stream.next_out = decompressed.data() + outWritten;
err = inflate(&stream, Z_NO_FLUSH);
if (!(err == Z_OK || err == Z_STREAM_END))
{
inflateEnd(&stream);
return {};
}
outWritten += availBefore - stream.avail_out;
bytesPerIteration *= 2;
}
while (err != Z_STREAM_END);
inflateEnd(&stream);
decompressed.resize(stream.total_out);
return decompressed;
}