зеркало из https://github.com/mozilla/gecko-dev.git
252 строки
6.6 KiB
C++
252 строки
6.6 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 FUNDAMENTALS_H
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#define FUNDAMENTALS_H
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#include <stddef.h>
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#include "Exports.h"
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#include "CatchAssert.h"
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#include "prlong.h"
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#include "prlog.h"
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#if defined(DEBUG) || defined(DEBUG_LOG)
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#include <stdio.h>
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#endif
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#ifndef USE_GENERATEDFILES
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#define USE_GENERATEDFILES 1
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#endif
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#ifdef NO_NSPR
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#include "Nonspr.h"
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#endif
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// Turn this on to have the internal addr values be two-word structures that permit
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// relocations of the generated code's references to objects.
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#ifndef BATCH_COMPILATION
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#define BATCH_COMPILATION 1
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#endif
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// DEBUG_LOG controls whether we compile in the routines to disassemble and dump
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// internal compiler state to a file or stdout. These are useful even in nondebug
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// builds but should not be present in release builds.
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#if defined(DEBUG) && !defined(DEBUG_LOG)
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#define DEBUG_LOG
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#endif
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// ----------------------------------------------------------------------------
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// Compiler idiosyncrasies
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// Metrowerks doesn't recognize the typename keyword yet.
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#ifdef __MWERKS__
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#define typename
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#endif
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// MANUAL_TEMPLATES means we instantiate all templates manually.
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#ifdef __GNUC__
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#define MANUAL_TEMPLATES
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#endif
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//
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// Compilers align bools and enums inside structures differently.
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// Some are nice enough to allocate only as many bytes as needed;
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// others always store these as entire words. On the latter we need to use
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// bit fields to persuade them to store these as bytes or halfwords.
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// We don't use bit fields on the former because:
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// 1. Some compilers generate much less efficient code for bit fields,
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// 2. Some compilers (esp. Metrowerks and egcs 1.03) generate buggy code
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// for bit fields.
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//
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// Use ENUM_8 after an 8-bit enum field declaration in a structure
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// Use ENUM_16 after a 16-bit enum field declaration in a structure
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// Use BOOL_8 after an 8-bit bool field declaration in a structure
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// Use CHAR_8 after a char field declaration (if it should be packed with one of the above)
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// Use SHORT_16 after a short field declaration (if it should be packed with one of the above)
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//
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// The last two macros are only necessary when packing a char or a short in the same
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// word as a bool or enum; some compilers don't put fields with bit widths in the
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// same word as fields without bit widths.
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//
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#if defined __MWERKS__ || defined WIN32 || defined __GNUC__
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#define ENUM_8
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#define ENUM_16
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#define BOOL_8
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#define CHAR_8
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#define SHORT_16
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#else
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#define ENUM_8 :8
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#define ENUM_16 :16
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#define BOOL_8 :8
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#define CHAR_8 :8
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#define SHORT_16 :16
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#endif
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// Use the following to make 64-bit integer constants
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#ifdef WIN32
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#define CONST64(val) val ## i64
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#else
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#define CONST64(val) val ## LL
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#endif
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// ----------------------------------------------------------------------------
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// Universal types
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#ifdef __GNUC__
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typedef unsigned int uint;
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#endif
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typedef char *ptr;
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typedef const char *cptr;
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typedef PRInt8 Int8;
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typedef PRUint8 Uint8;
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typedef PRInt16 Int16;
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typedef PRUint16 Uint16;
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typedef PRInt32 Int32;
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typedef PRUint32 Uint32;
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typedef PRInt64 Int64;
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typedef PRUint64 Uint64;
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typedef float Flt32; // 32-bit IEEE floating point
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typedef PRFloat64 Flt64; // 64-bit IEEE floating point
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// ----------------------------------------------------------------------------
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// Debugging
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// Use DEBUG_ONLY around function arguments that are only used in debug builds.
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// This avoids unused variable warnings in nondebug builds.
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#ifdef DEBUG
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#define DEBUG_ONLY(arg) arg
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#define NONDEBUG_ONLY(arg)
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#else
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#define DEBUG_ONLY(arg)
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#define NONDEBUG_ONLY(arg) arg
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#endif
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#ifdef DEBUG_LOG
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#define DEBUG_LOG_ONLY(arg) arg
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#else
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#define DEBUG_LOG_ONLY(arg)
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#endif
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#ifdef DEBUG
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#define trespass(string) { fprintf(stderr, "%s", string); assert(false); }
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#else
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#define trespass(string) assert(!string)
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#endif
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// ----------------------------------------------------------------------------
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// Tiny pieces of STL
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// These can be replaced by the real STL if it happens to be available
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// (but make sure that the real STL has these as inlines!).
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#ifndef STL
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template<class In, class Out>
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inline Out copy(In srcBegin, In srcEnd, Out dst)
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{
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while (srcBegin != srcEnd) {
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*dst = *srcBegin;
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++srcBegin;
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++dst;
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}
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return dst;
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}
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template<class Out, class T>
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inline void fill(Out first, Out last, T value)
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{
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while (first != last)
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*first++ = value;
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}
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template<class Out, class T>
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inline void fill_n(Out first, Uint32 n, T value)
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{
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while (n--)
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*first++ = value;
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}
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#endif
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// ----------------------------------------------------------------------------
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// Non-STL useful templates
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template<class In, class Out>
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inline Out move(In srcBegin, In srcEnd, Out dst)
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{
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while (srcBegin != srcEnd) {
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dst->move(*srcBegin);
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++srcBegin;
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++dst;
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}
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return dst;
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}
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// An abstract base class for representing closures of functions with no arguments.
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template<class Result>
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struct Function0
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{
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virtual Result operator()() = 0;
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};
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// An abstract base class for representing closures of functions with one argument.
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template<class Result, class Arg>
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struct Function1
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{
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virtual Result operator()(Arg arg) = 0;
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};
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// An abstract base class for representing closures of functions with two arguments.
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template<class Result, class Arg1, class Arg2>
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struct Function2
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{
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virtual Result operator()(Arg1 arg1, Arg2 arg2) = 0;
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};
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// An abstract base class for representing closures of functions with three arguments.
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template<class Result, class Arg1, class Arg2, class Arg3>
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struct Function3
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{
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virtual Result operator()(Arg1 arg1, Arg2 arg2, Arg3 arg3) = 0;
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};
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// ----------------------------------------------------------------------------
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// Pooled memory allocation
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inline void *operator new(size_t, void* ptr) {return ptr;}
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class Pool;
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NS_EXTERN void *operator new(size_t size, Pool &pool);
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#if !defined __MWERKS__ && !defined WIN32
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NS_EXTERN void *operator new[](size_t size, Pool &pool);
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NS_EXTERN void *operator new[](size_t size);
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#endif
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#endif
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