289 lines
8.8 KiB
C++
289 lines
8.8 KiB
C++
/*************************************************************************/
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/* compressed_translation.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "compressed_translation.h"
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#include "core/templates/pair.h"
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extern "C" {
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#include "thirdparty/misc/smaz.h"
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}
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struct _PHashTranslationCmp {
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int orig_len;
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CharString compressed;
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int offset;
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};
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void PHashTranslation::generate(const Ref<Translation> &p_from) {
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// This method compresses a Translation instance.
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// Right now, it doesn't handle context or plurals, so Translation subclasses using plurals or context (i.e TranslationPO) shouldn't be compressed.
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#ifdef TOOLS_ENABLED
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List<StringName> keys;
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p_from->get_message_list(&keys);
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int size = Math::larger_prime(keys.size());
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Vector<Vector<Pair<int, CharString>>> buckets;
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Vector<Map<uint32_t, int>> table;
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Vector<uint32_t> hfunc_table;
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Vector<_PHashTranslationCmp> compressed;
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table.resize(size);
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hfunc_table.resize(size);
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buckets.resize(size);
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compressed.resize(keys.size());
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int idx = 0;
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int total_compression_size = 0;
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int total_string_size = 0;
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for (List<StringName>::Element *E = keys.front(); E; E = E->next()) {
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//hash string
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CharString cs = E->get().operator String().utf8();
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uint32_t h = hash(0, cs.get_data());
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Pair<int, CharString> p;
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p.first = idx;
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p.second = cs;
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buckets.write[h % size].push_back(p);
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//compress string
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CharString src_s = p_from->get_message(E->get()).operator String().utf8();
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_PHashTranslationCmp ps;
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ps.orig_len = src_s.size();
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ps.offset = total_compression_size;
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if (ps.orig_len != 0) {
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CharString dst_s;
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dst_s.resize(src_s.size());
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int ret = smaz_compress(src_s.get_data(), src_s.size(), dst_s.ptrw(), src_s.size());
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if (ret >= src_s.size()) {
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//if compressed is larger than original, just use original
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ps.orig_len = src_s.size();
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ps.compressed = src_s;
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} else {
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dst_s.resize(ret);
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//ps.orig_len=;
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ps.compressed = dst_s;
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}
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} else {
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ps.orig_len = 1;
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ps.compressed.resize(1);
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ps.compressed[0] = 0;
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}
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compressed.write[idx] = ps;
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total_compression_size += ps.compressed.size();
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total_string_size += src_s.size();
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idx++;
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}
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int bucket_table_size = 0;
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for (int i = 0; i < size; i++) {
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const Vector<Pair<int, CharString>> &b = buckets[i];
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Map<uint32_t, int> &t = table.write[i];
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if (b.size() == 0) {
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continue;
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}
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int d = 1;
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int item = 0;
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while (item < b.size()) {
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uint32_t slot = hash(d, b[item].second.get_data());
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if (t.has(slot)) {
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item = 0;
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d++;
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t.clear();
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} else {
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t[slot] = b[item].first;
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item++;
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}
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}
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hfunc_table.write[i] = d;
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bucket_table_size += 2 + b.size() * 4;
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}
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ERR_FAIL_COND(bucket_table_size == 0);
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hash_table.resize(size);
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bucket_table.resize(bucket_table_size);
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int *htwb = hash_table.ptrw();
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int *btwb = bucket_table.ptrw();
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uint32_t *htw = (uint32_t *)&htwb[0];
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uint32_t *btw = (uint32_t *)&btwb[0];
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int btindex = 0;
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int collisions = 0;
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for (int i = 0; i < size; i++) {
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const Map<uint32_t, int> &t = table[i];
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if (t.size() == 0) {
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htw[i] = 0xFFFFFFFF; //nothing
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continue;
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} else if (t.size() > 1) {
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collisions += t.size() - 1;
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}
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htw[i] = btindex;
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btw[btindex++] = t.size();
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btw[btindex++] = hfunc_table[i];
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for (Map<uint32_t, int>::Element *E = t.front(); E; E = E->next()) {
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btw[btindex++] = E->key();
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btw[btindex++] = compressed[E->get()].offset;
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btw[btindex++] = compressed[E->get()].compressed.size();
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btw[btindex++] = compressed[E->get()].orig_len;
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}
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}
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strings.resize(total_compression_size);
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uint8_t *cw = strings.ptrw();
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for (int i = 0; i < compressed.size(); i++) {
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memcpy(&cw[compressed[i].offset], compressed[i].compressed.get_data(), compressed[i].compressed.size());
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}
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ERR_FAIL_COND(btindex != bucket_table_size);
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set_locale(p_from->get_locale());
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#endif
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}
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bool PHashTranslation::_set(const StringName &p_name, const Variant &p_value) {
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String name = p_name.operator String();
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if (name == "hash_table") {
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hash_table = p_value;
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} else if (name == "bucket_table") {
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bucket_table = p_value;
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} else if (name == "strings") {
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strings = p_value;
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} else if (name == "load_from") {
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generate(p_value);
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} else {
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return false;
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}
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return true;
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}
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bool PHashTranslation::_get(const StringName &p_name, Variant &r_ret) const {
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String name = p_name.operator String();
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if (name == "hash_table") {
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r_ret = hash_table;
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} else if (name == "bucket_table") {
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r_ret = bucket_table;
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} else if (name == "strings") {
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r_ret = strings;
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} else {
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return false;
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}
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return true;
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}
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StringName PHashTranslation::get_message(const StringName &p_src_text, const StringName &p_context) const {
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// p_context passed in is ignore. The use of context is not yet supported in PHashTranslation.
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int htsize = hash_table.size();
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if (htsize == 0) {
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return StringName();
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}
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CharString str = p_src_text.operator String().utf8();
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uint32_t h = hash(0, str.get_data());
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const int *htr = hash_table.ptr();
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const uint32_t *htptr = (const uint32_t *)&htr[0];
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const int *btr = bucket_table.ptr();
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const uint32_t *btptr = (const uint32_t *)&btr[0];
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const uint8_t *sr = strings.ptr();
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const char *sptr = (const char *)&sr[0];
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uint32_t p = htptr[h % htsize];
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if (p == 0xFFFFFFFF) {
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return StringName(); //nothing
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}
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const Bucket &bucket = *(const Bucket *)&btptr[p];
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h = hash(bucket.func, str.get_data());
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int idx = -1;
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for (int i = 0; i < bucket.size; i++) {
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if (bucket.elem[i].key == h) {
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idx = i;
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break;
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}
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}
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if (idx == -1) {
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return StringName();
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}
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if (bucket.elem[idx].comp_size == bucket.elem[idx].uncomp_size) {
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String rstr;
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rstr.parse_utf8(&sptr[bucket.elem[idx].str_offset], bucket.elem[idx].uncomp_size);
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return rstr;
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} else {
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CharString uncomp;
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uncomp.resize(bucket.elem[idx].uncomp_size + 1);
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smaz_decompress(&sptr[bucket.elem[idx].str_offset], bucket.elem[idx].comp_size, uncomp.ptrw(), bucket.elem[idx].uncomp_size);
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String rstr;
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rstr.parse_utf8(uncomp.get_data());
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return rstr;
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}
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}
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StringName PHashTranslation::get_plural_message(const StringName &p_src_text, const StringName &p_plural_text, int p_n, const StringName &p_context) const {
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// The use of plurals translation is not yet supported in PHashTranslation.
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return get_message(p_src_text, p_context);
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}
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void PHashTranslation::_get_property_list(List<PropertyInfo> *p_list) const {
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p_list->push_back(PropertyInfo(Variant::PACKED_INT32_ARRAY, "hash_table"));
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p_list->push_back(PropertyInfo(Variant::PACKED_INT32_ARRAY, "bucket_table"));
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p_list->push_back(PropertyInfo(Variant::PACKED_BYTE_ARRAY, "strings"));
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p_list->push_back(PropertyInfo(Variant::OBJECT, "load_from", PROPERTY_HINT_RESOURCE_TYPE, "Translation", PROPERTY_USAGE_EDITOR));
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}
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void PHashTranslation::_bind_methods() {
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ClassDB::bind_method(D_METHOD("generate", "from"), &PHashTranslation::generate);
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}
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