int LZ4_loadDict()

in src/lz4.c [956:987]

• 27 lines of code
• 6 McCabe index (conditional complexity)

int LZ4_loadDict (LZ4_stream_t* LZ4_dict, const char* dictionary, int dictSize)
{
    LZ4_stream_t_internal* dict = (LZ4_stream_t_internal*) LZ4_dict;
    const BYTE* p = (const BYTE*)dictionary;
    const BYTE* const dictEnd = p + dictSize;
    const BYTE* base;

    if ((dict->initCheck) || (dict->currentOffset > 1 GB))  /* Uninitialized structure, or reuse overflow */
        LZ4_resetStream(LZ4_dict);

    if (dictSize < (int)HASH_UNIT)
    {
        dict->dictionary = NULL;
        dict->dictSize = 0;
        return 0;
    }

    if ((dictEnd - p) > 64 KB) p = dictEnd - 64 KB;
    dict->currentOffset += 64 KB;
    base = p - dict->currentOffset;
    dict->dictionary = p;
    dict->dictSize = (U32)(dictEnd - p);
    dict->currentOffset += dict->dictSize;

    while (p <= dictEnd-HASH_UNIT)
    {
        LZ4_putPosition(p, dict->hashTable, byU32, base);
        p+=3;
    }

    return dict->dictSize;
}