зеркало из https://github.com/mozilla/gecko-dev.git
158 строки
3.9 KiB
C++
158 строки
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef _SYMBOL_MANAGER_H_
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#define _SYMBOL_MANAGER_H_
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#include "Fundamentals.h"
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#include "HashTable.h"
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#include "Vector.h"
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#include "Pool.h"
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template <class Owner, class Consumer>
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struct SymbolStruct
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{
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bool defined;
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bool used;
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char * name;
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Owner * owner;
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Vector<Consumer *> pending;
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SymbolStruct() : defined(0), used(0), name(0), owner(0) {}
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};
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template <class Owner, class Consumer>
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class SymbolManager
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{
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protected:
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typedef SymbolStruct<Owner, Consumer> Symbol;
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HashTable<Symbol> symbols;
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uint32 n_undefined;
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Vector<char *> ret_vector;
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public:
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SymbolManager(Pool& pool) : symbols(pool), n_undefined(0) {}
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void resolve(const char *name, Consumer& consumer)
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{
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if (!defined(name))
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differ(name, consumer);
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else
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link(*symbols[name].owner, consumer);
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symbols[name].used = 1;
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}
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Owner& get(const char *name)
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{
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Symbol& symbol = symbols[name];
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assert(symbol.defined);
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return *symbol.owner;
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}
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virtual void link(Owner& owner, Consumer& consumer) = 0;
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void define(const char *name, Owner& owner)
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{
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if (symbols.exists(name))
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{
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Symbol& symbol = symbols[name];
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uint32 count = symbol.pending.size();
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assert(!symbol.defined );
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symbol.owner = &owner;
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symbol.defined = 1;
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for (uint32 i = 0; i < count; i++)
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link(owner, *symbol.pending[i]);
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n_undefined--;
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}
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else
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{
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Symbol symbol;
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symbol.owner = &owner;
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symbol.defined = 1;
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symbol.name = strdup(name);
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symbols.add(name, symbol);
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}
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}
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inline bool exists(const char *name) {return symbols.exists(name);}
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inline bool defined(const char *name) {return exists(name) && symbols[name].defined;}
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inline bool used(const char *name) {return exists(name) && symbols[name].used;}
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void differ(const char *name, Consumer& consumer)
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{
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if (!exists(name))
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{
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Symbol symbol;
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symbol.name = strdup(name);
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symbols.add(name, symbol);
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n_undefined++;
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}
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symbols[name].pending.append(&consumer);
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}
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bool hasUndefinedSymbols() {return (n_undefined != 0);}
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Vector<char *>& undefinedSymbols()
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{
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Vector<Symbol>& all_symbols = symbols;
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uint32 count= all_symbols.size();
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ret_vector.eraseAll();
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if (n_undefined)
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for (uint32 i = 0; i < count; i++)
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if (!all_symbols[i].defined)
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ret_vector.append(all_symbols[i].name);
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return ret_vector;
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}
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bool hasUnusedSymbols()
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{
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Vector<Symbol>& all_symbols = symbols;
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uint32 count= all_symbols.size();
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for (uint32 i = 0; i < count; i++)
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if (!all_symbols[i].used)
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return 1;
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return 0;
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}
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Vector<char *>& unusedSymbols()
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{
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Vector<Symbol>& all_symbols = symbols;
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uint32 count= all_symbols.size();
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ret_vector.eraseAll();
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for (uint32 i = 0; i < count; i++)
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if (!all_symbols[i].used)
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ret_vector.append(all_symbols[i].name);
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return ret_vector;
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}
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};
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#endif /* _SYMBOL_MANAGER_H_ */
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