BeamMP-Server/src/Compressor.cpp

// Copyright (c) 2019-present Anonymous275.
// BeamMP Server code is not in the public domain and is not free software.
// One must be granted explicit permission by the copyright holder in order to modify or distribute any part of the source or binaries.
// Anything else is prohibited. Modified works may not be published and have be upstreamed to the official repository.
///
/// Created by Anonymous275 on 7/15/2020
///

#include <algorithm>
#include <array>
#include <iostream>
#include <zlib.h>

#define Biggest 30000
std::string Comp(std::string Data) {
    std::array<char, Biggest> C {};
    // obsolete
    C.fill(0);
    z_stream defstream;
    defstream.zalloc = Z_NULL;
    defstream.zfree = Z_NULL;
    defstream.opaque = Z_NULL;
    defstream.avail_in = (uInt)Data.length();
    defstream.next_in = (Bytef*)&Data[0];
    defstream.avail_out = Biggest;
    defstream.next_out = reinterpret_cast<Bytef*>(C.data());
    deflateInit(&defstream, Z_BEST_COMPRESSION);
    deflate(&defstream, Z_SYNC_FLUSH);
    deflate(&defstream, Z_FINISH);
    deflateEnd(&defstream);
    size_t TO = defstream.total_out;
    std::string Ret(TO, 0);
    std::copy_n(C.begin(), TO, Ret.begin());
    return Ret;
}
std::string DeComp(std::string Compressed) {
    std::array<char, Biggest> C {};
    // not needed
    C.fill(0);
    z_stream infstream;
    infstream.zalloc = Z_NULL;
    infstream.zfree = Z_NULL;
    infstream.opaque = Z_NULL;
    infstream.avail_in = Biggest;
    infstream.next_in = (Bytef*)(&Compressed[0]);
    infstream.avail_out = Biggest;
    infstream.next_out = (Bytef*)(C.data());
    inflateInit(&infstream);
    inflate(&infstream, Z_SYNC_FLUSH);
    inflate(&infstream, Z_FINISH);
    inflateEnd(&infstream);
    size_t TO = infstream.total_out;
    std::string Ret(TO, 0);
    std::copy_n(C.begin(), TO, Ret.begin());
    return Ret;
}