Function blake2s_update

Libraries/unrar/blake2s.cpp:123–162

void blake2s_update( blake2s_state *S, const byte *in, size_t inlen )
{
  while( inlen > 0 )
  {
    size_t left = S->buflen;
    size_t fill = 2 * BLAKE2S_BLOCKBYTES - left;

    if( inlen > fill )
    {
      memcpy( S->buf + left, in, fill ); // Fill buffer
      S->buflen += fill;
      blake2s_increment_counter( S, BLAKE2S_BLOCKBYTES );

#ifdef USE_SSE
#ifdef _WIN_32 // We use SSSE3 _mm_shuffle_epi8 only in x64 mode.
      if (_SSE_Version>=SSE_SSE2)
#else
      if (_SSE_Version>=SSE_SSSE3)
#endif
        blake2s_compress_sse( S, S->buf );
      else
        blake2s_compress( S, S->buf ); // Compress
#else
      blake2s_compress( S, S->buf ); // Compress
#endif
      
      memcpy( S->buf, S->buf + BLAKE2S_BLOCKBYTES, BLAKE2S_BLOCKBYTES ); // Shift buffer left
      S->buflen -= BLAKE2S_BLOCKBYTES;
      in += fill;
      inlen -= fill;
    }
    else // inlen <= fill
    {
      memcpy( S->buf + left, in, (size_t)inlen );
      S->buflen += (size_t)inlen; // Be lazy, do not compress
      in += inlen;
      inlen = 0;
    }
  }
}


void blake2s_final( blake2s_state *S, byte *digest )