godot/core/string_db.cpp

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/*************************************************************************/
/* string_db.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
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/* */
/* 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_db.h"
#include "print_string.h"
#include "os/os.h"
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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::lock=NULL;
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void StringName::setup() {
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lock = Mutex::create();
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ERR_FAIL_COND(configured);
for(int i=0;i<STRING_TABLE_LEN;i++) {
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_table[i]=NULL;
}
configured=true;
}
void StringName::cleanup() {
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lock->lock();
int lost_strings=0;
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for(int i=0;i<STRING_TABLE_LEN;i++) {
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while(_table[i]) {
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_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));
}
}
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_table[i]=_table[i]->next;
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memdelete(d);
}
}
if (OS::get_singleton()->is_stdout_verbose() && lost_strings) {
print_line("StringName: "+itos(lost_strings)+" unclaimed string names at exit.");
}
lock->unlock();
memdelete(lock);
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}
void StringName::unref() {
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ERR_FAIL_COND(!configured);
if (_data && _data->refcount.unref()) {
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lock->lock();
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if (_data->prev) {
_data->prev->next=_data->next;
} else {
if (_table[_data->idx]!=_data) {
ERR_PRINT("BUG!");
}
_table[_data->idx]=_data->next;
}
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if (_data->next) {
_data->next->prev=_data->prev;
}
memdelete(_data);
lock->unlock();
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}
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_data=NULL;
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}
bool StringName::operator==(const String& p_name) const {
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if (!_data) {
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return (p_name.length()==0);
}
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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 {
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return !(operator==(p_name));
}
bool StringName::operator!=(const StringName& p_name) const {
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// the real magic of all this mess happens here.
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// this is why path comparisons are very fast
return _data!=p_name._data;
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}
void StringName::operator=(const StringName& p_name) {
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if (this==&p_name)
return;
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unref();
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if (p_name._data && p_name._data->refcount.ref()) {
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_data = p_name._data;
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}
}
/* was inlined
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StringName::operator String() const {
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if (_data)
return _data->get_name();
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return "";
}
*/
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StringName::StringName(const StringName& p_name) {
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ERR_FAIL_COND(!configured);
_data=NULL;
if (p_name._data && p_name._data->refcount.ref()) {
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_data = p_name._data;
}
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}
StringName::StringName(const char *p_name) {
_data=NULL;
ERR_FAIL_COND(!configured);
if (!p_name || p_name[0]==0)
return; //empty, ignore
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lock->lock();
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uint32_t hash = String::hash(p_name);
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uint32_t idx=hash&STRING_TABLE_MASK;
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_data=_table[idx];
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while(_data) {
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// compare hash first
if (_data->hash==hash && _data->get_name()==p_name)
break;
_data=_data->next;
}
if (_data) {
if (_data->refcount.ref()) {
// exists
lock->unlock();
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return;
} else {
}
}
_data = memnew( _Data );
_data->name=p_name;
_data->refcount.init();
_data->hash=hash;
_data->idx=idx;
_data->cname=NULL;
_data->next=_table[idx];
_data->prev=NULL;
if (_table[idx])
_table[idx]->prev=_data;
_table[idx]=_data;
lock->unlock();
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}
StringName::StringName(const StaticCString& p_static_string) {
_data=NULL;
ERR_FAIL_COND(!configured);
ERR_FAIL_COND( !p_static_string.ptr || !p_static_string.ptr[0]);
lock->lock();
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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
lock->unlock();
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return;
} else {
}
}
_data = memnew( _Data );
_data->refcount.init();
_data->hash=hash;
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_data->idx=idx;
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_data->cname=p_static_string.ptr;
_data->next=_table[idx];
_data->prev=NULL;
if (_table[idx])
_table[idx]->prev=_data;
_table[idx]=_data;
lock->unlock();
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}
StringName::StringName(const String& p_name) {
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_data=NULL;
ERR_FAIL_COND(!configured);
if (p_name==String())
return;
lock->lock();
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uint32_t hash = p_name.hash();
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uint32_t idx=hash&STRING_TABLE_MASK;
_data=_table[idx];
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while(_data) {
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if (_data->hash==hash && _data->get_name()==p_name)
break;
_data=_data->next;
}
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if (_data) {
if (_data->refcount.ref()) {
// exists
lock->unlock();
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return;
} else {
}
}
_data = memnew( _Data );
_data->name=p_name;
_data->refcount.init();
_data->hash=hash;
_data->idx=idx;
_data->cname=NULL;
_data->next=_table[idx];
_data->prev=NULL;
if (_table[idx])
_table[idx]->prev=_data;
_table[idx]=_data;
lock->unlock();
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}
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();
lock->lock();
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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()) {
lock->unlock();
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return StringName(_data);
}
lock->unlock();
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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();
lock->lock();
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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()) {
lock->unlock();
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return StringName(_data);
}
lock->unlock();
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return StringName(); //does not exist
}
StringName StringName::search(const String &p_name) {
ERR_FAIL_COND_V( p_name=="", StringName() );
lock->lock();
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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()) {
lock->unlock();
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return StringName(_data);
}
lock->unlock();
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return StringName(); //does not exist
}
StringName::StringName() {
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_data=NULL;
}
StringName::~StringName() {
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unref();
}