static unsigned LZ4_count()

in lib/lz4/lz4.cc [318:343]

• 24 lines of code
• 10 McCabe index (conditional complexity)

static unsigned LZ4_count(const BYTE *pIn, const BYTE *pMatch, const BYTE *pInLimit) {
    const BYTE *const pStart = pIn;

    while (likely(pIn < pInLimit - (STEPSIZE - 1))) {
        size_t diff = LZ4_read_ARCH(pMatch) ^ LZ4_read_ARCH(pIn);
        if (!diff) {
            pIn += STEPSIZE;
            pMatch += STEPSIZE;
            continue;
        }
        pIn += LZ4_NbCommonBytes(diff);
        return (unsigned)(pIn - pStart);
    }

    if (LZ4_64bits())
        if ((pIn < (pInLimit - 3)) && (LZ4_read32(pMatch) == LZ4_read32(pIn))) {
            pIn += 4;
            pMatch += 4;
        }
    if ((pIn < (pInLimit - 1)) && (LZ4_read16(pMatch) == LZ4_read16(pIn))) {
        pIn += 2;
        pMatch += 2;
    }
    if ((pIn < pInLimit) && (*pMatch == *pIn)) pIn++;
    return (unsigned)(pIn - pStart);
}