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Diffstat (limited to 'src/liblzma/lzma/lzma_encoder_getoptimum.c')
| -rw-r--r-- | src/liblzma/lzma/lzma_encoder_getoptimum.c | 925 |
1 files changed, 0 insertions, 925 deletions
diff --git a/src/liblzma/lzma/lzma_encoder_getoptimum.c b/src/liblzma/lzma/lzma_encoder_getoptimum.c deleted file mode 100644 index b175e4cb..00000000 --- a/src/liblzma/lzma/lzma_encoder_getoptimum.c +++ /dev/null @@ -1,925 +0,0 @@ -/////////////////////////////////////////////////////////////////////////////// -// -/// \file lzma_encoder_getoptimum.c -// -// Copyright (C) 1999-2006 Igor Pavlov -// Copyright (C) 2007 Lasse Collin -// -// This library is free software; you can redistribute it and/or -// modify it under the terms of the GNU Lesser General Public -// License as published by the Free Software Foundation; either -// version 2.1 of the License, or (at your option) any later version. -// -// This library is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -// Lesser General Public License for more details. -// -/////////////////////////////////////////////////////////////////////////////// - -// NOTE: If you want to keep the line length in 80 characters, set -// tab width to 4 or less in your editor when editing this file. - - -// "Would you love the monster code? -// Could you understand beauty of the beast?" -// --Adapted from Lordi's "Would you love a monster man". - - -#include "lzma_encoder_private.h" -#include "fastpos.h" - - -#define length_get_price(length_encoder, symbol, pos_state) \ - (length_encoder).prices[pos_state][symbol] - - -#define get_rep_len_1_price(state, pos_state) \ - bit_get_price_0(coder->is_rep0[state]) \ - + bit_get_price_0(coder->is_rep0_long[state][pos_state]) - - -// Adds to price_target. -#define get_pure_rep_price(price_target, rep_index, state, pos_state) \ -do { \ - if ((rep_index) == 0) { \ - price_target += bit_get_price_0(coder->is_rep0[state]); \ - price_target += bit_get_price_1( \ - coder->is_rep0_long[state][pos_state]); \ - } else { \ - price_target += bit_get_price_1(coder->is_rep0[state]); \ - if ((rep_index) == 1) { \ - price_target += bit_get_price_0(coder->is_rep1[state]); \ - } else { \ - price_target += bit_get_price_1(coder->is_rep1[state]); \ - price_target += bit_get_price( \ - coder->is_rep2[state], (rep_index) - 2); \ - } \ - } \ -} while (0) - - -// Adds to price_target. -#define get_rep_price(price_target, rep_index, len, state, pos_state) \ -do { \ - get_pure_rep_price(price_target, rep_index, state, pos_state); \ - price_target += length_get_price(coder->rep_len_encoder, \ - (len) - MATCH_MIN_LEN, pos_state); \ -} while (0) - - -// Adds to price_target. -#define get_pos_len_price(price_target, pos, len, pos_state) \ -do { \ - const uint32_t len_to_pos_state_tmp = get_len_to_pos_state(len); \ - if ((pos) < FULL_DISTANCES) { \ - price_target += distances_prices[len_to_pos_state_tmp][pos]; \ - } else { \ - price_target \ - += pos_slot_prices[len_to_pos_state_tmp][get_pos_slot_2(pos)] \ - + align_prices[(pos) & ALIGN_MASK]; \ - } \ - price_target += length_get_price( \ - coder->match_len_encoder, (len) - MATCH_MIN_LEN, pos_state); \ -} while (0) - - -// Three macros to manipulate lzma_optimal structures: -#define make_as_char(opt) \ -do { \ - (opt).back_prev = UINT32_MAX; \ - (opt).prev_1_is_char = false; \ -} while (0) - - -#define make_as_short_rep(opt) \ -do { \ - (opt).back_prev = 0; \ - (opt).prev_1_is_char = false; \ -} while (0) - - -#define is_short_rep(opt) \ - ((opt).back_prev == 0) - - -static void -fill_length_prices(lzma_length_encoder *lc, uint32_t pos_state) -{ - const uint32_t num_symbols = lc->table_size; - const uint32_t a0 = bit_get_price_0(lc->choice); - const uint32_t a1 = bit_get_price_1(lc->choice); - const uint32_t b0 = a1 + bit_get_price_0(lc->choice2); - const uint32_t b1 = a1 + bit_get_price_1(lc->choice2); - - uint32_t *prices = lc->prices[pos_state]; - uint32_t i = 0; - - for (i = 0; i < num_symbols && i < LEN_LOW_SYMBOLS; ++i) - prices[i] = a0 + bittree_get_price(lc->low[pos_state], - LEN_LOW_BITS, i); - - for (; i < num_symbols && i < LEN_LOW_SYMBOLS + LEN_MID_SYMBOLS; ++i) - prices[i] = b0 + bittree_get_price(lc->mid[pos_state], - LEN_MID_BITS, i - LEN_LOW_SYMBOLS); - - for (; i < num_symbols; ++i) - prices[i] = b1 + bittree_get_price(lc->high, LEN_HIGH_BITS, - i - LEN_LOW_SYMBOLS - LEN_MID_SYMBOLS); - - lc->counters[pos_state] = num_symbols; - - return; -} - - -static void -fill_distances_prices(lzma_coder *coder) -{ - uint32_t temp_prices[FULL_DISTANCES]; - - for (uint32_t i = START_POS_MODEL_INDEX; i < FULL_DISTANCES; ++i) { - const uint32_t pos_slot = get_pos_slot(i); - const uint32_t footer_bits = ((pos_slot >> 1) - 1); - const uint32_t base = (2 | (pos_slot & 1)) << footer_bits; - temp_prices[i] = bittree_reverse_get_price( - coder->pos_encoders + base - pos_slot - 1, - footer_bits, i - base); - } - - const uint32_t dist_table_size = coder->dist_table_size; - - for (uint32_t len_to_pos_state = 0; - len_to_pos_state < LEN_TO_POS_STATES; - ++len_to_pos_state) { - - const probability *encoder = coder->pos_slot_encoder[len_to_pos_state]; - uint32_t *pos_slot_prices = coder->pos_slot_prices[len_to_pos_state]; - - for (uint32_t pos_slot = 0; - pos_slot < dist_table_size; - ++pos_slot) { - pos_slot_prices[pos_slot] = bittree_get_price(encoder, - POS_SLOT_BITS, pos_slot); - } - - for (uint32_t pos_slot = END_POS_MODEL_INDEX; - pos_slot < dist_table_size; - ++pos_slot) - pos_slot_prices[pos_slot] += (((pos_slot >> 1) - 1) - - ALIGN_BITS) << BIT_PRICE_SHIFT_BITS; - - - uint32_t *distances_prices - = coder->distances_prices[len_to_pos_state]; - - uint32_t i; - for (i = 0; i < START_POS_MODEL_INDEX; ++i) - distances_prices[i] = pos_slot_prices[i]; - - for (; i < FULL_DISTANCES; ++i) - distances_prices[i] = pos_slot_prices[get_pos_slot(i)] - + temp_prices[i]; - } - - coder->match_price_count = 0; - - return; -} - - -static void -fill_align_prices(lzma_coder *coder) -{ - for (uint32_t i = 0; i < ALIGN_TABLE_SIZE; ++i) - coder->align_prices[i] = bittree_reverse_get_price( - coder->pos_align_encoder, ALIGN_BITS, i); - - coder->align_price_count = 0; - return; -} - - -// The first argument is a pointer returned by literal_get_subcoder(). -static uint32_t -literal_get_price(const probability *encoders, const bool match_mode, - const uint8_t match_byte, const uint8_t symbol) -{ - uint32_t price = 0; - uint32_t context = 1; - int i = 8; - - if (match_mode) { - do { - --i; - const uint32_t match_bit = (match_byte >> i) & 1; - const uint32_t bit = (symbol >> i) & 1; - const uint32_t subcoder_index - = 0x100 + (match_bit << 8) + context; - - price += bit_get_price(encoders[subcoder_index], bit); - context = (context << 1) | bit; - - if (match_bit != bit) - break; - - } while (i != 0); - } - - while (i != 0) { - --i; - const uint32_t bit = (symbol >> i) & 1; - price += bit_get_price(encoders[context], bit); - context = (context << 1) | bit; - } - - return price; -} - - -static void -backward(lzma_coder *restrict coder, uint32_t *restrict len_res, - uint32_t *restrict back_res, uint32_t cur) -{ - coder->optimum_end_index = cur; - - uint32_t pos_mem = coder->optimum[cur].pos_prev; - uint32_t back_mem = coder->optimum[cur].back_prev; - - do { - if (coder->optimum[cur].prev_1_is_char) { - make_as_char(coder->optimum[pos_mem]); - coder->optimum[pos_mem].pos_prev = pos_mem - 1; - - if (coder->optimum[cur].prev_2) { - coder->optimum[pos_mem - 1].prev_1_is_char = false; - coder->optimum[pos_mem - 1].pos_prev - = coder->optimum[cur].pos_prev_2; - coder->optimum[pos_mem - 1].back_prev - = coder->optimum[cur].back_prev_2; - } - } - - uint32_t pos_prev = pos_mem; - uint32_t back_cur = back_mem; - - back_mem = coder->optimum[pos_prev].back_prev; - pos_mem = coder->optimum[pos_prev].pos_prev; - - coder->optimum[pos_prev].back_prev = back_cur; - coder->optimum[pos_prev].pos_prev = cur; - cur = pos_prev; - - } while (cur != 0); - - coder->optimum_current_index = coder->optimum[0].pos_prev; - *len_res = coder->optimum[0].pos_prev; - *back_res = coder->optimum[0].back_prev; - - return; -} - - -extern void -lzma_get_optimum(lzma_coder *restrict coder, - uint32_t *restrict back_res, uint32_t *restrict len_res) -{ - uint32_t position = coder->now_pos; - uint32_t pos_state = position & coder->pos_mask; - - // Update the price tables. In the C++ LZMA SDK 4.42 this was done in both - // initialization function and in the main loop. In liblzma they were - // moved into this single place. - if (coder->additional_offset == 0) { - if (coder->match_price_count >= (1 << 7)) - fill_distances_prices(coder); - - if (coder->align_price_count >= ALIGN_TABLE_SIZE) - fill_align_prices(coder); - } - - if (coder->prev_len_encoder != NULL) { - if (--coder->prev_len_encoder->counters[pos_state] == 0) - fill_length_prices(coder->prev_len_encoder, pos_state); - - coder->prev_len_encoder = NULL; - } - - - if (coder->optimum_end_index != coder->optimum_current_index) { - *len_res = coder->optimum[coder->optimum_current_index].pos_prev - - coder->optimum_current_index; - *back_res = coder->optimum[coder->optimum_current_index].back_prev; - coder->optimum_current_index = coder->optimum[ - coder->optimum_current_index].pos_prev; - return; - } - - coder->optimum_current_index = 0; - coder->optimum_end_index = 0; - - - const uint32_t fast_bytes = coder->fast_bytes; - uint32_t *match_distances = coder->match_distances; - - uint32_t len_main; - uint32_t num_distance_pairs; - - if (!coder->longest_match_was_found) { - lzma_read_match_distances(coder, &len_main, &num_distance_pairs); - } else { - len_main = coder->longest_match_length; - num_distance_pairs = coder->num_distance_pairs; - coder->longest_match_was_found = false; - } - - - const uint8_t *buf = coder->lz.buffer + coder->lz.read_pos - 1; - uint32_t num_available_bytes - = coder->lz.write_pos - coder->lz.read_pos + 1; - if (num_available_bytes < 2) { - *back_res = UINT32_MAX; - *len_res = 1; - return; - } - - if (num_available_bytes > MATCH_MAX_LEN) - num_available_bytes = MATCH_MAX_LEN; - - - uint32_t reps[REP_DISTANCES]; - uint32_t rep_lens[REP_DISTANCES]; - uint32_t rep_max_index = 0; - - for (uint32_t i = 0; i < REP_DISTANCES; ++i) { - reps[i] = coder->reps[i]; - const uint32_t back_offset = reps[i] + 1; - - if (buf[0] != *(buf - back_offset) - || buf[1] != *(buf + 1 - back_offset)) { - rep_lens[i] = 0; - continue; - } - - uint32_t len_test; - for (len_test = 2; len_test < num_available_bytes - && buf[len_test] == *(buf + len_test - back_offset); - ++len_test) ; - - rep_lens[i] = len_test; - if (len_test > rep_lens[rep_max_index]) - rep_max_index = i; - } - - if (rep_lens[rep_max_index] >= fast_bytes) { - *back_res = rep_max_index; - *len_res = rep_lens[rep_max_index]; - move_pos(*len_res - 1); - return; - } - - - if (len_main >= fast_bytes) { - *back_res = match_distances[num_distance_pairs] + REP_DISTANCES; - *len_res = len_main; - move_pos(len_main - 1); - return; - } - - uint8_t current_byte = *buf; - uint8_t match_byte = *(buf - reps[0] - 1); - - if (len_main < 2 && current_byte != match_byte - && rep_lens[rep_max_index] < 2) { - *back_res = UINT32_MAX; - *len_res = 1; - return; - } - - coder->optimum[0].state = coder->state; - - coder->optimum[1].price = bit_get_price_0( - coder->is_match[coder->state][pos_state]) - + literal_get_price( - literal_get_subcoder(coder->literal_coder, - position, coder->previous_byte), - !is_literal_state(coder->state), match_byte, current_byte); - - make_as_char(coder->optimum[1]); - - uint32_t match_price - = bit_get_price_1(coder->is_match[coder->state][pos_state]); - uint32_t rep_match_price - = match_price + bit_get_price_1(coder->is_rep[coder->state]); - - - if (match_byte == current_byte) { - const uint32_t short_rep_price = rep_match_price - + get_rep_len_1_price(coder->state, pos_state); - - if (short_rep_price < coder->optimum[1].price) { - coder->optimum[1].price = short_rep_price; - make_as_short_rep(coder->optimum[1]); - } - } - - uint32_t len_end = (len_main >= rep_lens[rep_max_index]) - ? len_main - : rep_lens[rep_max_index]; - - if (len_end < 2) { - *back_res = coder->optimum[1].back_prev; - *len_res = 1; - return; - } - - coder->optimum[1].pos_prev = 0; - - for (uint32_t i = 0; i < REP_DISTANCES; ++i) - coder->optimum[0].backs[i] = reps[i]; - - uint32_t len = len_end; - do { - coder->optimum[len].price = INFINITY_PRICE; - } while (--len >= 2); - - - uint32_t (*distances_prices)[FULL_DISTANCES] = coder->distances_prices; - uint32_t (*pos_slot_prices)[DIST_TABLE_SIZE_MAX] = coder->pos_slot_prices; - uint32_t *align_prices = coder->align_prices; - - for (uint32_t i = 0; i < REP_DISTANCES; ++i) { - uint32_t rep_len = rep_lens[i]; - if (rep_len < 2) - continue; - - uint32_t price = rep_match_price; - get_pure_rep_price(price, i, coder->state, pos_state); - - do { - const uint32_t cur_and_len_price = price - + length_get_price( - coder->rep_len_encoder, - rep_len - 2, pos_state); - - if (cur_and_len_price < coder->optimum[rep_len].price) { - coder->optimum[rep_len].price = cur_and_len_price; - coder->optimum[rep_len].pos_prev = 0; - coder->optimum[rep_len].back_prev = i; - coder->optimum[rep_len].prev_1_is_char = false; - } - } while (--rep_len >= 2); - } - - - uint32_t normal_match_price = match_price - + bit_get_price_0(coder->is_rep[coder->state]); - - len = (rep_lens[0] >= 2) ? rep_lens[0] + 1 : 2; - - if (len <= len_main) { - uint32_t offs = 0; - - while (len > match_distances[offs + 1]) - offs += 2; - - for(; ; ++len) { - const uint32_t distance = match_distances[offs + 2]; - uint32_t cur_and_len_price = normal_match_price; - get_pos_len_price(cur_and_len_price, distance, len, pos_state); - - if (cur_and_len_price < coder->optimum[len].price) { - coder->optimum[len].price = cur_and_len_price; - coder->optimum[len].pos_prev = 0; - coder->optimum[len].back_prev = distance + REP_DISTANCES; - coder->optimum[len].prev_1_is_char = false; - } - - if (len == match_distances[offs + 1]) { - offs += 2; - if (offs == num_distance_pairs) - break; - } - } - } - - - ////////////////// - // Big loop ;-) // - ////////////////// - - uint32_t cur = 0; - - // The rest of this function is a huge while-loop. To avoid extreme - // indentation, the indentation level is not increased here. - while (true) { - - ++cur; - - assert(cur < OPTS); - - if (cur == len_end) { - backward(coder, len_res, back_res, cur); - return; - } - - uint32_t new_len; - - lzma_read_match_distances(coder, &new_len, &num_distance_pairs); - - if (new_len >= fast_bytes) { - coder->num_distance_pairs = num_distance_pairs; - coder->longest_match_length = new_len; - coder->longest_match_was_found = true; - backward(coder, len_res, back_res, cur); - return; - } - - - ++position; - - uint32_t pos_prev = coder->optimum[cur].pos_prev; - uint32_t state; - - if (coder->optimum[cur].prev_1_is_char) { - --pos_prev; - - if (coder->optimum[cur].prev_2) { - state = coder->optimum[coder->optimum[cur].pos_prev_2].state; - - if (coder->optimum[cur].back_prev_2 < REP_DISTANCES) - update_long_rep(state); - else - update_match(state); - - } else { - state = coder->optimum[pos_prev].state; - } - - update_literal(state); - - } else { - state = coder->optimum[pos_prev].state; - } - - if (pos_prev == cur - 1) { - if (is_short_rep(coder->optimum[cur])) - update_short_rep(state); - else - update_literal(state); - } else { - uint32_t pos; - if (coder->optimum[cur].prev_1_is_char && coder->optimum[cur].prev_2) { - pos_prev = coder->optimum[cur].pos_prev_2; - pos = coder->optimum[cur].back_prev_2; - update_long_rep(state); - } else { - pos = coder->optimum[cur].back_prev; - if (pos < REP_DISTANCES) - update_long_rep(state); - else - update_match(state); - } - - if (pos < REP_DISTANCES) { - reps[0] = coder->optimum[pos_prev].backs[pos]; - - uint32_t i; - for (i = 1; i <= pos; ++i) - reps[i] = coder->optimum[pos_prev].backs[i - 1]; - - for (; i < REP_DISTANCES; ++i) - reps[i] = coder->optimum[pos_prev].backs[i]; - - } else { - reps[0] = pos - REP_DISTANCES; - - for (uint32_t i = 1; i < REP_DISTANCES; ++i) - reps[i] = coder->optimum[pos_prev].backs[i - 1]; - } - } - - coder->optimum[cur].state = state; - - for (uint32_t i = 0; i < REP_DISTANCES; ++i) - coder->optimum[cur].backs[i] = reps[i]; - - const uint32_t cur_price = coder->optimum[cur].price; - - buf = coder->lz.buffer + coder->lz.read_pos - 1; - current_byte = *buf; - match_byte = *(buf - reps[0] - 1); - - pos_state = position & coder->pos_mask; - - const uint32_t cur_and_1_price = cur_price - + bit_get_price_0(coder->is_match[state][pos_state]) - + literal_get_price( - literal_get_subcoder(coder->literal_coder, - position, buf[-1]), - !is_literal_state(state), match_byte, current_byte); - - bool next_is_char = false; - - if (cur_and_1_price < coder->optimum[cur + 1].price) { - coder->optimum[cur + 1].price = cur_and_1_price; - coder->optimum[cur + 1].pos_prev = cur; - make_as_char(coder->optimum[cur + 1]); - next_is_char = true; - } - - match_price = cur_price - + bit_get_price_1(coder->is_match[state][pos_state]); - rep_match_price = match_price - + bit_get_price_1(coder->is_rep[state]); - - if (match_byte == current_byte - && !(coder->optimum[cur + 1].pos_prev < cur - && coder->optimum[cur + 1].back_prev == 0)) { - - const uint32_t short_rep_price = rep_match_price - + get_rep_len_1_price(state, pos_state); - - if (short_rep_price <= coder->optimum[cur + 1].price) { - coder->optimum[cur + 1].price = short_rep_price; - coder->optimum[cur + 1].pos_prev = cur; - make_as_short_rep(coder->optimum[cur + 1]); - next_is_char = true; - } - } - - uint32_t num_available_bytes_full - = coder->lz.write_pos - coder->lz.read_pos + 1; - num_available_bytes_full = MIN(OPTS - 1 - cur, num_available_bytes_full); - num_available_bytes = num_available_bytes_full; - - if (num_available_bytes < 2) - continue; - - if (num_available_bytes > fast_bytes) - num_available_bytes = fast_bytes; - - if (!next_is_char && match_byte != current_byte) { // speed optimization - // try literal + rep0 - const uint32_t back_offset = reps[0] + 1; - const uint32_t limit = MIN(num_available_bytes_full, fast_bytes + 1); - - uint32_t temp; - for (temp = 1; temp < limit - && buf[temp] == *(buf + temp - back_offset); - ++temp) ; - - const uint32_t len_test_2 = temp - 1; - - if (len_test_2 >= 2) { - uint32_t state_2 = state; - update_literal(state_2); - - const uint32_t pos_state_next = (position + 1) & coder->pos_mask; - const uint32_t next_rep_match_price = cur_and_1_price - + bit_get_price_1(coder->is_match[state_2][pos_state_next]) - + bit_get_price_1(coder->is_rep[state_2]); - - // for (; len_test_2 >= 2; --len_test_2) { - const uint32_t offset = cur + 1 + len_test_2; - - while (len_end < offset) - coder->optimum[++len_end].price = INFINITY_PRICE; - - uint32_t cur_and_len_price = next_rep_match_price; - get_rep_price(cur_and_len_price, - 0, len_test_2, state_2, pos_state_next); - - if (cur_and_len_price < coder->optimum[offset].price) { - coder->optimum[offset].price = cur_and_len_price; - coder->optimum[offset].pos_prev = cur + 1; - coder->optimum[offset].back_prev = 0; - coder->optimum[offset].prev_1_is_char = true; - coder->optimum[offset].prev_2 = false; - } -// } - } - } - - - uint32_t start_len = 2; // speed optimization - - for (uint32_t rep_index = 0; rep_index < REP_DISTANCES; ++rep_index) { - const uint32_t back_offset = reps[rep_index] + 1; - - if (buf[0] != *(buf - back_offset) || buf[1] != *(buf + 1 - back_offset)) - continue; - - uint32_t len_test; - for (len_test = 2; len_test < num_available_bytes - && buf[len_test] == *(buf + len_test - back_offset); - ++len_test) ; - - while (len_end < cur + len_test) - coder->optimum[++len_end].price = INFINITY_PRICE; - - const uint32_t len_test_temp = len_test; - uint32_t price = rep_match_price; - get_pure_rep_price(price, rep_index, state, pos_state); - - do { - const uint32_t cur_and_len_price = price - + length_get_price(coder->rep_len_encoder, - len_test - 2, pos_state); - - if (cur_and_len_price < coder->optimum[cur + len_test].price) { - coder->optimum[cur + len_test].price = cur_and_len_price; - coder->optimum[cur + len_test].pos_prev = cur; - coder->optimum[cur + len_test].back_prev = rep_index; - coder->optimum[cur + len_test].prev_1_is_char = false; - } - } while (--len_test >= 2); - - len_test = len_test_temp; - - if (rep_index == 0) - start_len = len_test + 1; - - - uint32_t len_test_2 = len_test + 1; - const uint32_t limit = MIN(num_available_bytes_full, - len_test_2 + fast_bytes); - for (; len_test_2 < limit - && buf[len_test_2] == *(buf + len_test_2 - back_offset); - ++len_test_2) ; - - len_test_2 -= len_test + 1; - - if (len_test_2 >= 2) { - uint32_t state_2 = state; - update_long_rep(state_2); - - uint32_t pos_state_next = (position + len_test) & coder->pos_mask; - - const uint32_t cur_and_len_char_price = price - + length_get_price(coder->rep_len_encoder, - len_test - 2, pos_state) - + bit_get_price_0(coder->is_match[state_2][pos_state_next]) - + literal_get_price( - literal_get_subcoder(coder->literal_coder, - position + len_test, buf[len_test - 1]), - true, *(buf + len_test - back_offset), buf[len_test]); - - update_literal(state_2); - - pos_state_next = (position + len_test + 1) & coder->pos_mask; - - const uint32_t next_rep_match_price = cur_and_len_char_price - + bit_get_price_1(coder->is_match[state_2][pos_state_next]) - + bit_get_price_1(coder->is_rep[state_2]); - -// for(; len_test_2 >= 2; len_test_2--) { - const uint32_t offset = cur + len_test + 1 + len_test_2; - - while (len_end < offset) - coder->optimum[++len_end].price = INFINITY_PRICE; - - uint32_t cur_and_len_price = next_rep_match_price; - get_rep_price(cur_and_len_price, - 0, len_test_2, state_2, pos_state_next); - - if (cur_and_len_price < coder->optimum[offset].price) { - coder->optimum[offset].price = cur_and_len_price; - coder->optimum[offset].pos_prev = cur + len_test + 1; - coder->optimum[offset].back_prev = 0; - coder->optimum[offset].prev_1_is_char = true; - coder->optimum[offset].prev_2 = true; - coder->optimum[offset].pos_prev_2 = cur; - coder->optimum[offset].back_prev_2 = rep_index; - } -// } - } - } - - -// for (uint32_t len_test = 2; len_test <= new_len; ++len_test) - if (new_len > num_available_bytes) { - new_len = num_available_bytes; - - for (num_distance_pairs = 0; - new_len > match_distances[num_distance_pairs + 1]; - num_distance_pairs += 2) ; - - match_distances[num_distance_pairs + 1] = new_len; - num_distance_pairs += 2; - } - - - if (new_len >= start_len) { - normal_match_price = match_price - + bit_get_price_0(coder->is_rep[state]); - - while (len_end < cur + new_len) - coder->optimum[++len_end].price = INFINITY_PRICE; - - uint32_t offs = 0; - while (start_len > match_distances[offs + 1]) - offs += 2; - - uint32_t cur_back = match_distances[offs + 2]; - uint32_t pos_slot = get_pos_slot_2(cur_back); - - for (uint32_t len_test = start_len; ; ++len_test) { - uint32_t cur_and_len_price = normal_match_price; - const uint32_t len_to_pos_state = get_len_to_pos_state(len_test); - - if (cur_back < FULL_DISTANCES) - cur_and_len_price += distances_prices[ - len_to_pos_state][cur_back]; - else - cur_and_len_price += pos_slot_prices[ - len_to_pos_state][pos_slot] - + align_prices[cur_back & ALIGN_MASK]; - - cur_and_len_price += length_get_price(coder->match_len_encoder, - len_test - MATCH_MIN_LEN, pos_state); - - if (cur_and_len_price < coder->optimum[cur + len_test].price) { - coder->optimum[cur + len_test].price = cur_and_len_price; - coder->optimum[cur + len_test].pos_prev = cur; - coder->optimum[cur + len_test].back_prev - = cur_back + REP_DISTANCES; - coder->optimum[cur + len_test].prev_1_is_char = false; - } - - if (len_test == match_distances[offs + 1]) { - // Try Match + Literal + Rep0 - const uint32_t back_offset = cur_back + 1; - uint32_t len_test_2 = len_test + 1; - const uint32_t limit = MIN(num_available_bytes_full, - len_test_2 + fast_bytes); - - for (; len_test_2 < limit && - buf[len_test_2] == *(buf + len_test_2 - back_offset); - ++len_test_2) ; - - len_test_2 -= len_test + 1; - - if (len_test_2 >= 2) { - uint32_t state_2 = state; - update_match(state_2); - uint32_t pos_state_next - = (position + len_test) & coder->pos_mask; - - const uint32_t cur_and_len_char_price = cur_and_len_price - + bit_get_price_0( - coder->is_match[state_2][pos_state_next]) - + literal_get_price( - literal_get_subcoder( - coder->literal_coder, - position + len_test, - buf[len_test - 1]), - true, - *(buf + len_test - back_offset), - buf[len_test]); - - update_literal(state_2); - pos_state_next = (pos_state_next + 1) & coder->pos_mask; - - const uint32_t next_rep_match_price - = cur_and_len_char_price - + bit_get_price_1( - coder->is_match[state_2][pos_state_next]) - + bit_get_price_1(coder->is_rep[state_2]); - - // for(; len_test_2 >= 2; --len_test_2) { - const uint32_t offset = cur + len_test + 1 + len_test_2; - - while (len_end < offset) - coder->optimum[++len_end].price = INFINITY_PRICE; - - cur_and_len_price = next_rep_match_price; - get_rep_price(cur_and_len_price, - 0, len_test_2, state_2, pos_state_next); - - if (cur_and_len_price < coder->optimum[offset].price) { - coder->optimum[offset].price = cur_and_len_price; - coder->optimum[offset].pos_prev = cur + len_test + 1; - coder->optimum[offset].back_prev = 0; - coder->optimum[offset].prev_1_is_char = true; - coder->optimum[offset].prev_2 = true; - coder->optimum[offset].pos_prev_2 = cur; - coder->optimum[offset].back_prev_2 - = cur_back + REP_DISTANCES; - } -// } - } - - offs += 2; - if (offs == num_distance_pairs) - break; - - cur_back = match_distances[offs + 2]; - if (cur_back >= FULL_DISTANCES) - pos_slot = get_pos_slot_2(cur_back); - } - } - } - - } // Closes: while (true) -} |