int LZ4_saveDict()

in lz4.cpp [1814:1834]

• 16 lines of code
• 5 McCabe index (conditional complexity)

int LZ4_saveDict (LZ4_stream_t* LZ4_dict, char* safeBuffer, int dictSize)
{
    LZ4_stream_t_internal* const dict = &LZ4_dict->internal_donotuse;

    DEBUGLOG(5, "LZ4_saveDict : dictSize=%i, safeBuffer=%p", dictSize, safeBuffer);

    if ((U32)dictSize > 64 KB) { dictSize = 64 KB; } /* useless to define a dictionary > 64 KB */
    if ((U32)dictSize > dict->dictSize) { dictSize = (int)dict->dictSize; }

    if (safeBuffer == NULL) assert(dictSize == 0);
    if (dictSize > 0) {
        const BYTE* const previousDictEnd = dict->dictionary + dict->dictSize;
        assert(dict->dictionary);
        LZ4_memmove(safeBuffer, previousDictEnd - dictSize, (size_t)dictSize);
    }

    dict->dictionary = (const BYTE*)safeBuffer;
    dict->dictSize = (U32)dictSize;

    return dictSize;
}