162 lines
4.8 KiB
C++
162 lines
4.8 KiB
C++
/*************************************************************************/
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/* string_db.h */
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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) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 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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#ifndef STRING_DB_H
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#define STRING_DB_H
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#include "hash_map.h"
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#include "safe_refcount.h"
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#include "ustring.h"
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/**
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@author Juan Linietsky <reduzio@gmail.com>
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*/
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struct StaticCString {
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const char *ptr;
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static StaticCString create(const char *p_ptr);
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};
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class StringName {
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enum {
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STRING_TABLE_BITS = 12,
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STRING_TABLE_LEN = 1 << STRING_TABLE_BITS,
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STRING_TABLE_MASK = STRING_TABLE_LEN - 1
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};
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struct _Data {
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SafeRefCount refcount;
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const char *cname;
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String name;
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String get_name() const { return cname ? String(cname) : name; }
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int idx;
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uint32_t hash;
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_Data *prev;
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_Data *next;
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_Data() {
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cname = NULL;
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next = prev = NULL;
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hash = 0;
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}
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};
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static _Data *_table[STRING_TABLE_LEN];
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_Data *_data;
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union _HashUnion {
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_Data *ptr;
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uint32_t hash;
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};
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void unref();
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friend void register_core_types();
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friend void unregister_core_types();
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static void setup();
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static void cleanup();
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static bool configured;
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StringName(_Data *p_data) { _data = p_data; }
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public:
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operator const void *() const { return (_data && (_data->cname || !_data->name.empty())) ? (void *)1 : 0; }
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bool operator==(const String &p_name) const;
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bool operator==(const char *p_name) const;
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bool operator!=(const String &p_name) const;
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_FORCE_INLINE_ bool operator<(const StringName &p_name) const {
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return _data < p_name._data;
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}
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_FORCE_INLINE_ bool 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
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return _data == p_name._data;
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}
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_FORCE_INLINE_ uint32_t hash() const {
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if (_data)
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return _data->hash;
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else
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return 0;
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}
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bool operator!=(const StringName &p_name) const;
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_FORCE_INLINE_ operator String() const {
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if (_data) {
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if (_data->cname)
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return String(_data->cname);
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else
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return _data->name;
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}
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return String();
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}
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static StringName search(const char *p_name);
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static StringName search(const CharType *p_name);
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static StringName search(const String &p_name);
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struct AlphCompare {
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_FORCE_INLINE_ bool operator()(const StringName &l, const StringName &r) const {
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return l.operator String() < r.operator String();
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}
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};
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void operator=(const StringName &p_name);
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StringName(const char *p_name);
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StringName(const StringName &p_name);
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StringName(const String &p_name);
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StringName(const StaticCString &p_static_string);
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StringName();
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~StringName();
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};
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struct StringNameHasher {
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static _FORCE_INLINE_ uint32_t hash(const StringName &p_string) { return p_string.hash(); }
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};
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StringName _scs_create(const char *p_chr);
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//#define _SCS(m_cstr) (m_cstr[0]?StringName(StaticCString::create(m_cstr)):StringName())
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#define _SCS(m_cstr) _scs_create(m_cstr)
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#endif
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