compat.zstd

// Round-trip compress→decompress per codec, asserting byte-for-byte recovery.
#include <bzlib.h>
#include <lz4.h>
#include <lzma.h>
#include <zlib.h>
#include <zstd.h>
#include <cstdint>
#include <cstring>
#include <limits>
#include <vector>

static bool same_bytes(const void* a, size_t an, const void* b, size_t bn) {
    return an == bn && std::memcmp(a, b, bn) == 0;
}

int main() {
    const uint8_t input[] = "mcpp compat compression smoke";
    const size_t input_size = sizeof(input) - 1;

    uint8_t zc[256] = {}; uLongf zcs = sizeof(zc);
    if (compress2(zc, &zcs, input, (uLong)input_size, Z_BEST_SPEED) != Z_OK) return 1;
    uint8_t zo[sizeof(input)] = {}; uLongf zos = input_size;
// …