godot/core/string/optimized_translation.cpp
2021-09-30 15:09:12 -06:00

290 lines
8.7 KiB
C++

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