godot/core/string_name.cpp
2020-04-02 13:38:00 +02:00

400 lines
8.5 KiB
C++

/*************************************************************************/
/* string_name.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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 "string_name.h"
#include "core/os/os.h"
#include "core/print_string.h"
StaticCString StaticCString::create(const char *p_ptr) {
StaticCString scs;
scs.ptr = p_ptr;
return scs;
}
StringName::_Data *StringName::_table[STRING_TABLE_LEN];
StringName _scs_create(const char *p_chr) {
return (p_chr[0] ? StringName(StaticCString::create(p_chr)) : StringName());
}
bool StringName::configured = false;
Mutex StringName::mutex;
void StringName::setup() {
ERR_FAIL_COND(configured);
for (int i = 0; i < STRING_TABLE_LEN; i++) {
_table[i] = nullptr;
}
configured = true;
}
void StringName::cleanup() {
MutexLock lock(mutex);
int lost_strings = 0;
for (int i = 0; i < STRING_TABLE_LEN; i++) {
while (_table[i]) {
_Data *d = _table[i];
lost_strings++;
if (OS::get_singleton()->is_stdout_verbose()) {
if (d->cname) {
print_line("Orphan StringName: " + String(d->cname));
} else {
print_line("Orphan StringName: " + String(d->name));
}
}
_table[i] = _table[i]->next;
memdelete(d);
}
}
if (lost_strings) {
print_verbose("StringName: " + itos(lost_strings) + " unclaimed string names at exit.");
}
}
void StringName::unref() {
ERR_FAIL_COND(!configured);
if (_data && _data->refcount.unref()) {
MutexLock lock(mutex);
if (_data->prev) {
_data->prev->next = _data->next;
} else {
if (_table[_data->idx] != _data) {
ERR_PRINT("BUG!");
}
_table[_data->idx] = _data->next;
}
if (_data->next) {
_data->next->prev = _data->prev;
}
memdelete(_data);
}
_data = nullptr;
}
bool StringName::operator==(const String &p_name) const {
if (!_data) {
return (p_name.length() == 0);
}
return (_data->get_name() == p_name);
}
bool StringName::operator==(const char *p_name) const {
if (!_data) {
return (p_name[0] == 0);
}
return (_data->get_name() == p_name);
}
bool StringName::operator!=(const String &p_name) const {
return !(operator==(p_name));
}
bool StringName::operator!=(const StringName &p_name) const {
// the real magic of all this mess happens here.
// this is why path comparisons are very fast
return _data != p_name._data;
}
void StringName::operator=(const StringName &p_name) {
if (this == &p_name)
return;
unref();
if (p_name._data && p_name._data->refcount.ref()) {
_data = p_name._data;
}
}
StringName::StringName(const StringName &p_name) {
_data = nullptr;
ERR_FAIL_COND(!configured);
if (p_name._data && p_name._data->refcount.ref()) {
_data = p_name._data;
}
}
StringName::StringName(const char *p_name) {
_data = nullptr;
ERR_FAIL_COND(!configured);
if (!p_name || p_name[0] == 0)
return; //empty, ignore
MutexLock lock(mutex);
uint32_t hash = String::hash(p_name);
uint32_t idx = hash & STRING_TABLE_MASK;
_data = _table[idx];
while (_data) {
// compare hash first
if (_data->hash == hash && _data->get_name() == p_name)
break;
_data = _data->next;
}
if (_data) {
if (_data->refcount.ref()) {
// exists
return;
}
}
_data = memnew(_Data);
_data->name = p_name;
_data->refcount.init();
_data->hash = hash;
_data->idx = idx;
_data->cname = nullptr;
_data->next = _table[idx];
_data->prev = nullptr;
if (_table[idx])
_table[idx]->prev = _data;
_table[idx] = _data;
}
StringName::StringName(const StaticCString &p_static_string) {
_data = nullptr;
ERR_FAIL_COND(!configured);
ERR_FAIL_COND(!p_static_string.ptr || !p_static_string.ptr[0]);
MutexLock lock(mutex);
uint32_t hash = String::hash(p_static_string.ptr);
uint32_t idx = hash & STRING_TABLE_MASK;
_data = _table[idx];
while (_data) {
// compare hash first
if (_data->hash == hash && _data->get_name() == p_static_string.ptr)
break;
_data = _data->next;
}
if (_data) {
if (_data->refcount.ref()) {
// exists
return;
}
}
_data = memnew(_Data);
_data->refcount.init();
_data->hash = hash;
_data->idx = idx;
_data->cname = p_static_string.ptr;
_data->next = _table[idx];
_data->prev = nullptr;
if (_table[idx])
_table[idx]->prev = _data;
_table[idx] = _data;
}
StringName::StringName(const String &p_name) {
_data = nullptr;
ERR_FAIL_COND(!configured);
if (p_name == String())
return;
MutexLock lock(mutex);
uint32_t hash = p_name.hash();
uint32_t idx = hash & STRING_TABLE_MASK;
_data = _table[idx];
while (_data) {
if (_data->hash == hash && _data->get_name() == p_name)
break;
_data = _data->next;
}
if (_data) {
if (_data->refcount.ref()) {
// exists
return;
}
}
_data = memnew(_Data);
_data->name = p_name;
_data->refcount.init();
_data->hash = hash;
_data->idx = idx;
_data->cname = nullptr;
_data->next = _table[idx];
_data->prev = nullptr;
if (_table[idx])
_table[idx]->prev = _data;
_table[idx] = _data;
}
StringName StringName::search(const char *p_name) {
ERR_FAIL_COND_V(!configured, StringName());
ERR_FAIL_COND_V(!p_name, StringName());
if (!p_name[0])
return StringName();
MutexLock lock(mutex);
uint32_t hash = String::hash(p_name);
uint32_t idx = hash & STRING_TABLE_MASK;
_Data *_data = _table[idx];
while (_data) {
// compare hash first
if (_data->hash == hash && _data->get_name() == p_name)
break;
_data = _data->next;
}
if (_data && _data->refcount.ref()) {
return StringName(_data);
}
return StringName(); //does not exist
}
StringName StringName::search(const CharType *p_name) {
ERR_FAIL_COND_V(!configured, StringName());
ERR_FAIL_COND_V(!p_name, StringName());
if (!p_name[0])
return StringName();
MutexLock lock(mutex);
uint32_t hash = String::hash(p_name);
uint32_t idx = hash & STRING_TABLE_MASK;
_Data *_data = _table[idx];
while (_data) {
// compare hash first
if (_data->hash == hash && _data->get_name() == p_name)
break;
_data = _data->next;
}
if (_data && _data->refcount.ref()) {
return StringName(_data);
}
return StringName(); //does not exist
}
StringName StringName::search(const String &p_name) {
ERR_FAIL_COND_V(p_name == "", StringName());
MutexLock lock(mutex);
uint32_t hash = p_name.hash();
uint32_t idx = hash & STRING_TABLE_MASK;
_Data *_data = _table[idx];
while (_data) {
// compare hash first
if (_data->hash == hash && p_name == _data->get_name())
break;
_data = _data->next;
}
if (_data && _data->refcount.ref()) {
return StringName(_data);
}
return StringName(); //does not exist
}
StringName::StringName() {
_data = nullptr;
}
StringName::~StringName() {
unref();
}