static mz_bool tdefl_compress_fast(tdefl_compressor *d) {
  // Faster, minimally featured LZRW1-style match+parse loop with better
  // register utilization. Intended for applications where raw throughput is
  // valued more highly than ratio.
  mz_uint lookahead_pos = d->m_lookahead_pos,
          lookahead_size = d->m_lookahead_size, dict_size = d->m_dict_size,
          total_lz_bytes = d->m_total_lz_bytes,
          num_flags_left = d->m_num_flags_left;
  mz_uint8 *pLZ_code_buf = d->m_pLZ_code_buf, *pLZ_flags = d->m_pLZ_flags;
  mz_uint cur_pos = lookahead_pos & TDEFL_LZ_DICT_SIZE_MASK;

  while ((d->m_src_buf_left) || ((d->m_flush) && (lookahead_size))) {
    const mz_uint TDEFL_COMP_FAST_LOOKAHEAD_SIZE = 4096;
    mz_uint dst_pos =
        (lookahead_pos + lookahead_size) & TDEFL_LZ_DICT_SIZE_MASK;
    mz_uint num_bytes_to_process = (mz_uint)MZ_MIN(
        d->m_src_buf_left, TDEFL_COMP_FAST_LOOKAHEAD_SIZE - lookahead_size);
    d->m_src_buf_left -= num_bytes_to_process;
    lookahead_size += num_bytes_to_process;

    while (num_bytes_to_process) {
      mz_uint32 n = MZ_MIN(TDEFL_LZ_DICT_SIZE - dst_pos, num_bytes_to_process);
      memcpy(d->m_dict + dst_pos, d->m_pSrc, n);
      if (dst_pos < (TDEFL_MAX_MATCH_LEN - 1))
        memcpy(d->m_dict + TDEFL_LZ_DICT_SIZE + dst_pos, d->m_pSrc,
               MZ_MIN(n, (TDEFL_MAX_MATCH_LEN - 1) - dst_pos));
      d->m_pSrc += n;
      dst_pos = (dst_pos + n) & TDEFL_LZ_DICT_SIZE_MASK;
      num_bytes_to_process -= n;
    }

    dict_size = MZ_MIN(TDEFL_LZ_DICT_SIZE - lookahead_size, dict_size);
    if ((!d->m_flush) && (lookahead_size < TDEFL_COMP_FAST_LOOKAHEAD_SIZE))
      break;

    while (lookahead_size >= 4) {
      mz_uint cur_match_dist, cur_match_len = 1;
      mz_uint8 *pCur_dict = d->m_dict + cur_pos;
      mz_uint first_trigram = (*(const mz_uint32 *)pCur_dict) & 0xFFFFFF;
      mz_uint hash =
          (first_trigram ^ (first_trigram >> (24 - (TDEFL_LZ_HASH_BITS - 8)))) &
          TDEFL_LEVEL1_HASH_SIZE_MASK;
      mz_uint probe_pos = d->m_hash[hash];
      d->m_hash[hash] = (mz_uint16)lookahead_pos;

      if (((cur_match_dist = (mz_uint16)(lookahead_pos - probe_pos)) <=
           dict_size) &&
          ((*(const mz_uint32 *)(d->m_dict +
                                 (probe_pos &= TDEFL_LZ_DICT_SIZE_MASK)) &
            0xFFFFFF) == first_trigram)) {
        const mz_uint16 *p = (const mz_uint16 *)pCur_dict;
        const mz_uint16 *q = (const mz_uint16 *)(d->m_dict + probe_pos);
        mz_uint32 probe_len = 32;
        do {
        } while ((TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (--probe_len > 0));
        cur_match_len = ((mz_uint)(p - (const mz_uint16 *)pCur_dict) * 2) +
                        (mz_uint)(*(const mz_uint8 *)p == *(const mz_uint8 *)q);
        if (!probe_len)
          cur_match_len = cur_match_dist ? TDEFL_MAX_MATCH_LEN : 0;

        if ((cur_match_len < TDEFL_MIN_MATCH_LEN) ||
            ((cur_match_len == TDEFL_MIN_MATCH_LEN) &&
             (cur_match_dist >= 8U * 1024U))) {
          cur_match_len = 1;
          *pLZ_code_buf++ = (mz_uint8)first_trigram;
          *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1);
          d->m_huff_count[0][(mz_uint8)first_trigram]++;
        } else {
          mz_uint32 s0, s1;
          cur_match_len = MZ_MIN(cur_match_len, lookahead_size);

          MZ_ASSERT((cur_match_len >= TDEFL_MIN_MATCH_LEN) &&
                    (cur_match_dist >= 1) &&
                    (cur_match_dist <= TDEFL_LZ_DICT_SIZE));

          cur_match_dist--;

          pLZ_code_buf[0] = (mz_uint8)(cur_match_len - TDEFL_MIN_MATCH_LEN);
          *(mz_uint16 *)(&pLZ_code_buf[1]) = (mz_uint16)cur_match_dist;
          pLZ_code_buf += 3;
          *pLZ_flags = (mz_uint8)((*pLZ_flags >> 1) | 0x80);

          s0 = s_tdefl_small_dist_sym[cur_match_dist & 511];
          s1 = s_tdefl_large_dist_sym[cur_match_dist >> 8];
          d->m_huff_count[1][(cur_match_dist < 512) ? s0 : s1]++;

          d->m_huff_count[0][s_tdefl_len_sym[cur_match_len -
                                             TDEFL_MIN_MATCH_LEN]]++;
        }
      } else {
        *pLZ_code_buf++ = (mz_uint8)first_trigram;
        *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1);
        d->m_huff_count[0][(mz_uint8)first_trigram]++;
      }

      if (--num_flags_left == 0) {
        num_flags_left = 8;
        pLZ_flags = pLZ_code_buf++;
      }

      total_lz_bytes += cur_match_len;
      lookahead_pos += cur_match_len;
      dict_size = MZ_MIN(dict_size + cur_match_len, TDEFL_LZ_DICT_SIZE);
      cur_pos = (cur_pos + cur_match_len) & TDEFL_LZ_DICT_SIZE_MASK;
      MZ_ASSERT(lookahead_size >= cur_match_len);
      lookahead_size -= cur_match_len;

      if (pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) {
        int n;
        d->m_lookahead_pos = lookahead_pos;
        d->m_lookahead_size = lookahead_size;
        d->m_dict_size = dict_size;
        d->m_total_lz_bytes = total_lz_bytes;
        d->m_pLZ_code_buf = pLZ_code_buf;
        d->m_pLZ_flags = pLZ_flags;
        d->m_num_flags_left = num_flags_left;
        if ((n = tdefl_flush_block(d, 0)) != 0)
          return (n < 0) ? MZ_FALSE : MZ_TRUE;
        total_lz_bytes = d->m_total_lz_bytes;
        pLZ_code_buf = d->m_pLZ_code_buf;
        pLZ_flags = d->m_pLZ_flags;
        num_flags_left = d->m_num_flags_left;
      }
    }

    while (lookahead_size) {
      mz_uint8 lit = d->m_dict[cur_pos];

      total_lz_bytes++;
      *pLZ_code_buf++ = lit;
      *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1);
      if (--num_flags_left == 0) {
        num_flags_left = 8;
        pLZ_flags = pLZ_code_buf++;
      }

      d->m_huff_count[0][lit]++;

      lookahead_pos++;
      dict_size = MZ_MIN(dict_size + 1, TDEFL_LZ_DICT_SIZE);
      cur_pos = (cur_pos + 1) & TDEFL_LZ_DICT_SIZE_MASK;
      lookahead_size--;

      if (pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) {
        int n;
        d->m_lookahead_pos = lookahead_pos;
        d->m_lookahead_size = lookahead_size;
        d->m_dict_size = dict_size;
        d->m_total_lz_bytes = total_lz_bytes;
        d->m_pLZ_code_buf = pLZ_code_buf;
        d->m_pLZ_flags = pLZ_flags;
        d->m_num_flags_left = num_flags_left;
        if ((n = tdefl_flush_block(d, 0)) != 0)
          return (n < 0) ? MZ_FALSE : MZ_TRUE;
        total_lz_bytes = d->m_total_lz_bytes;
        pLZ_code_buf = d->m_pLZ_code_buf;
        pLZ_flags = d->m_pLZ_flags;
        num_flags_left = d->m_num_flags_left;
      }
    }
  }

  d->m_lookahead_pos = lookahead_pos;
  d->m_lookahead_size = lookahead_size;
  d->m_dict_size = dict_size;
  d->m_total_lz_bytes = total_lz_bytes;
  d->m_pLZ_code_buf = pLZ_code_buf;
  d->m_pLZ_flags = pLZ_flags;
  d->m_num_flags_left = num_flags_left;
  return MZ_TRUE;
}
static mz_bool tdefl_compress_fast(tdefl_compressor *d) {
   
   
   
  mz_uint lookahead_pos = d->m_lookahead_pos,
          lookahead_size = d->m_lookahead_size, dict_size = d->m_dict_size,
          total_lz_bytes = d->m_total_lz_bytes,
          num_flags_left = d->m_num_flags_left;
  mz_uint8 *pLZ_code_buf = d->m_pLZ_code_buf, *pLZ_flags = d->m_pLZ_flags;
  mz_uint cur_pos = lookahead_pos & TDEFL_LZ_DICT_SIZE_MASK;

  while ((d->m_src_buf_left) || ((d->m_flush) && (lookahead_size))) {
    const mz_uint TDEFL_COMP_FAST_LOOKAHEAD_SIZE = 4096;
    mz_uint dst_pos =
        (lookahead_pos + lookahead_size) & TDEFL_LZ_DICT_SIZE_MASK;
    mz_uint num_bytes_to_process = (mz_uint)MZ_MIN(
        d->m_src_buf_left, TDEFL_COMP_FAST_LOOKAHEAD_SIZE - lookahead_size);
    d->m_src_buf_left -= num_bytes_to_process;
    lookahead_size += num_bytes_to_process;

    while (num_bytes_to_process) {
      mz_uint32 n = MZ_MIN(TDEFL_LZ_DICT_SIZE - dst_pos, num_bytes_to_process);
      memcpy(d->m_dict + dst_pos, d->m_pSrc, n);
      if (dst_pos < (TDEFL_MAX_MATCH_LEN - 1))
        memcpy(d->m_dict + TDEFL_LZ_DICT_SIZE + dst_pos, d->m_pSrc,
               MZ_MIN(n, (TDEFL_MAX_MATCH_LEN - 1) - dst_pos));
      d->m_pSrc += n;
      dst_pos = (dst_pos + n) & TDEFL_LZ_DICT_SIZE_MASK;
      num_bytes_to_process -= n;
    }

    dict_size = MZ_MIN(TDEFL_LZ_DICT_SIZE - lookahead_size, dict_size);
    if ((!d->m_flush) && (lookahead_size < TDEFL_COMP_FAST_LOOKAHEAD_SIZE))
      break;

    while (lookahead_size >= 4) {
      mz_uint cur_match_dist, cur_match_len = 1;
      mz_uint8 *pCur_dict = d->m_dict + cur_pos;
      mz_uint first_trigram = (*(const mz_uint32 *)pCur_dict) & 0xFFFFFF;
      mz_uint hash =
          (first_trigram ^ (first_trigram >> (24 - (TDEFL_LZ_HASH_BITS - 8)))) &
          TDEFL_LEVEL1_HASH_SIZE_MASK;
      mz_uint probe_pos = d->m_hash[hash];
      d->m_hash[hash] = (mz_uint16)lookahead_pos;

      if (((cur_match_dist = (mz_uint16)(lookahead_pos - probe_pos)) <=
           dict_size) &&
          ((*(const mz_uint32 *)(d->m_dict +
                                 (probe_pos &= TDEFL_LZ_DICT_SIZE_MASK)) &
            0xFFFFFF) == first_trigram)) {
        const mz_uint16 *p = (const mz_uint16 *)pCur_dict;
        const mz_uint16 *q = (const mz_uint16 *)(d->m_dict + probe_pos);
        mz_uint32 probe_len = 32;
        do {
        } while ((TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (TDEFL_READ_UNALIGNED_WORD(++p) ==
                  TDEFL_READ_UNALIGNED_WORD(++q)) &&
                 (--probe_len > 0));
        cur_match_len = ((mz_uint)(p - (const mz_uint16 *)pCur_dict) * 2) +
                        (mz_uint)(*(const mz_uint8 *)p == *(const mz_uint8 *)q);
        if (!probe_len)
          cur_match_len = cur_match_dist ? TDEFL_MAX_MATCH_LEN : 0;

        if ((cur_match_len < TDEFL_MIN_MATCH_LEN) ||
            ((cur_match_len == TDEFL_MIN_MATCH_LEN) &&
             (cur_match_dist >= 8U * 1024U))) {
          cur_match_len = 1;
          *pLZ_code_buf++ = (mz_uint8)first_trigram;
          *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1);
          d->m_huff_count[0][(mz_uint8)first_trigram]++;
        } else {
          mz_uint32 s0, s1;
          cur_match_len = MZ_MIN(cur_match_len, lookahead_size);

          MZ_ASSERT((cur_match_len >= TDEFL_MIN_MATCH_LEN) &&
                    (cur_match_dist >= 1) &&
                    (cur_match_dist <= TDEFL_LZ_DICT_SIZE));

          cur_match_dist--;

          pLZ_code_buf[0] = (mz_uint8)(cur_match_len - TDEFL_MIN_MATCH_LEN);
          *(mz_uint16 *)(&pLZ_code_buf[1]) = (mz_uint16)cur_match_dist;
          pLZ_code_buf += 3;
          *pLZ_flags = (mz_uint8)((*pLZ_flags >> 1) | 0x80);

          s0 = s_tdefl_small_dist_sym[cur_match_dist & 511];
          s1 = s_tdefl_large_dist_sym[cur_match_dist >> 8];
          d->m_huff_count[1][(cur_match_dist < 512) ? s0 : s1]++;

          d->m_huff_count[0][s_tdefl_len_sym[cur_match_len -
                                             TDEFL_MIN_MATCH_LEN]]++;
        }
      } else {
        *pLZ_code_buf++ = (mz_uint8)first_trigram;
        *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1);
        d->m_huff_count[0][(mz_uint8)first_trigram]++;
      }

      if (--num_flags_left == 0) {
        num_flags_left = 8;
        pLZ_flags = pLZ_code_buf++;
      }

      total_lz_bytes += cur_match_len;
      lookahead_pos += cur_match_len;
      dict_size = MZ_MIN(dict_size + cur_match_len, TDEFL_LZ_DICT_SIZE);
      cur_pos = (cur_pos + cur_match_len) & TDEFL_LZ_DICT_SIZE_MASK;
      MZ_ASSERT(lookahead_size >= cur_match_len);
      lookahead_size -= cur_match_len;

      if (pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) {
        int n;
        d->m_lookahead_pos = lookahead_pos;
        d->m_lookahead_size = lookahead_size;
        d->m_dict_size = dict_size;
        d->m_total_lz_bytes = total_lz_bytes;
        d->m_pLZ_code_buf = pLZ_code_buf;
        d->m_pLZ_flags = pLZ_flags;
        d->m_num_flags_left = num_flags_left;
        if ((n = tdefl_flush_block(d, 0)) != 0)
          return (n < 0) ? MZ_FALSE : MZ_TRUE;
        total_lz_bytes = d->m_total_lz_bytes;
        pLZ_code_buf = d->m_pLZ_code_buf;
        pLZ_flags = d->m_pLZ_flags;
        num_flags_left = d->m_num_flags_left;
      }
    }

    while (lookahead_size) {
      mz_uint8 lit = d->m_dict[cur_pos];

      total_lz_bytes++;
      *pLZ_code_buf++ = lit;
      *pLZ_flags = (mz_uint8)(*pLZ_flags >> 1);
      if (--num_flags_left == 0) {
        num_flags_left = 8;
        pLZ_flags = pLZ_code_buf++;
      }

      d->m_huff_count[0][lit]++;

      lookahead_pos++;
      dict_size = MZ_MIN(dict_size + 1, TDEFL_LZ_DICT_SIZE);
      cur_pos = (cur_pos + 1) & TDEFL_LZ_DICT_SIZE_MASK;
      lookahead_size--;

      if (pLZ_code_buf > &d->m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE - 8]) {
        int n;
        d->m_lookahead_pos = lookahead_pos;
        d->m_lookahead_size = lookahead_size;
        d->m_dict_size = dict_size;
        d->m_total_lz_bytes = total_lz_bytes;
        d->m_pLZ_code_buf = pLZ_code_buf;
        d->m_pLZ_flags = pLZ_flags;
        d->m_num_flags_left = num_flags_left;
        if ((n = tdefl_flush_block(d, 0)) != 0)
          return (n < 0) ? MZ_FALSE : MZ_TRUE;
        total_lz_bytes = d->m_total_lz_bytes;
        pLZ_code_buf = d->m_pLZ_code_buf;
        pLZ_flags = d->m_pLZ_flags;
        num_flags_left = d->m_num_flags_left;
      }
    }
  }

  d->m_lookahead_pos = lookahead_pos;
  d->m_lookahead_size = lookahead_size;
  d->m_dict_size = dict_size;
  d->m_total_lz_bytes = total_lz_bytes;
  d->m_pLZ_code_buf = pLZ_code_buf;
  d->m_pLZ_flags = pLZ_flags;
  d->m_num_flags_left = num_flags_left;
  return MZ_TRUE;
}