CRC32.cpp

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#include <sourcepp/crypto/CRC32.h>
 
#include <BufferStream.h>
#include <tomcrypt.h>
 
#include <sourcepp/crypto/Globals.h>
 
using namespace sourcepp;
 
uint32_t crypto::computeCRC32(std::span<const std::byte> buffer) {
    if (!LTM_MATH || buffer.empty()) {
        return 0;
    }
 
    crc32_state crc32;
    crc32_init(&crc32);
    crc32_update(&crc32, reinterpret_cast<const unsigned char*>(buffer.data()), buffer.size());
 
    uint32_t final;
    crc32_finish(&crc32, &final, sizeof(final));
    BufferStream::swap_endian(&final);
    return final;
}