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#pragma once
#include <zlib.h>
#include <cstring>
#include <string>
inline bool gzipInflate(const std::string& compressedBytes,
std::string& uncompressedBytes) {
if (compressedBytes.empty()) {
uncompressedBytes = compressedBytes;
return true;
}
uncompressedBytes.clear();
unsigned half_length = compressedBytes.size() / 2;
z_stream strm{};
// The following line is nolint because we're declaring away constness.
// It's not clear why the input buffers on zlib aren't const, so this is a
// bit of a cheat for the moment
strm.next_in = (Bytef*)compressedBytes.data(); // NOLINT
strm.avail_in = compressedBytes.size();
strm.total_out = 0;
strm.zalloc = Z_NULL;
strm.zfree = Z_NULL;
bool done = false;
if (inflateInit2(&strm, (16 + MAX_WBITS)) != Z_OK) {
return false;
}
while (!done) {
// If our output buffer is too small
if (strm.total_out >= uncompressedBytes.size()) {
uncompressedBytes.resize(uncompressedBytes.size() + half_length);
}
strm.next_out =
(Bytef*)(uncompressedBytes.data() + strm.total_out); // NOLINT
strm.avail_out =
((uLong)uncompressedBytes.size() - strm.total_out); // NOLINT
// Inflate another chunk.
int err = inflate(&strm, Z_SYNC_FLUSH);
if (err == Z_STREAM_END) {
done = true;
} else if (err != Z_OK) {
break;
}
}
return inflateEnd(&strm) == Z_OK;
}
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