debug.h

用VC實現截取Window的消息

/** @file Debug.h
 *
 * Common debugging macros.  Many of these macros are similar to those provided
 * by MFC and are designed to allow for "MFC neutral" code (code than can be
 * compiled with or without MFC support).  Other macros add even more debugging
 * facilities.
 *
 * Description of available macros:
 *
 * ASSERT			: Identical to the MFC macro of the same name.
 * VERIFY			: Identical to the MFC macro of the same name.
 * TRACE			: Identical to the MFC macro of the same name.
 * INFO				: Similar to TRACE but includes a preamble specifying the
 *					  file name and line number where the INFO is called as
 *					  well as forces a line break at the end.
 * DBG				: Code contained within this macro is included only in
 *					  _DEBUG builds.
 * BREAK			: Forces a break in _DEBUG builds via DebugBreak.
 * DECL_DOG_TAG		: Declares a "dog tag" within a class definition (see the
 *					  discussion on dog tags below) in _DEBUG builds.
 * CHECK_DOG_TAG	: Checks the validity of a "dog tag" in _DEBUG builds.
 *
 *
 * Dog Tags
 *
 * Dog tags are a technique that can be used to verify that an object has
 * not been stepped on by a memory overrun.  To use them you simply use the
 * DECL_DOG_TAG macro to declare a dog tag at the beginning and ending of
 * the class definition.  After this, you can check the validity of an
 * object by using the CHECK_DOG_TAG macro.  For example:
 *
 * class MyClass
 * {
 * public:
 *    DECL_DOG_TAG(tagBegin);
 *    // code removed for brevity...
 *    DECL_DOG_TAG(tagEnd);
 * };
 *
 * and later:
 *
 *    MyClass obj;
 *    // code removed for brevity...
 *    CHECK_DOG_TAG(obj.tagBegin);
 *    CHECK_DOG_TAG(obj.tagEnd);
 *
 * @author William E. Kempf
 * @version 2.0
 *
 * Copyright &copy 2000 NEWare Software.
 *
 * This code may be used in compiled form in any way you desire (including
 * commercial use). The code may be redistributed unmodified by any means providing
 * it is not sold for profit without the authors written consent, and providing that
 * this notice and the authors name and all copyright notices remains intact. However,
 * this file and the accompanying source code may not be hosted on a website or bulletin
 * board without the authors written permission.
 *
 * <b><i>This software is provided "as is" without express or implied warranty. Use it
 * at your own risk!</i></b>
 */

#if !defined(_DEBUG_H_0DBFB267_B244_11D3_A459_000629B2F85_INCLUDED_)
#define _DEBUG_H_0DBFB267_B244_11D3_A459_000629B2F85_INCLUDED_

#if _MSC_VER >= 1000
#pragma once
#endif	// _MSC_VER >= 1000

#ifndef	_MFC_VER

#include <crtdbg.h>

#define	ASSERT	_ASSERT

#ifdef	_DEBUG
#define	VERIFY(f)	ASSERT(f)

inline void _cdecl Trace0DBFB266_B244_11D3_A459_000629B2F85(char* lpszFormat, ...)
{
	va_list args;
	va_start(args, lpszFormat);

	int nBuf;
	char szBuffer[512];

	nBuf = _vsnprintf(szBuffer, sizeof(szBuffer) / sizeof(WCHAR), lpszFormat, args);
	ASSERT(nBuf < sizeof(szBuffer));//Output truncated as it was > sizeof(szBuffer)

	OutputDebugStringA(szBuffer);
	va_end(args);
}

#define	TRACE	Trace0DBFB266_B244_11D3_A459_000629B2F85

#else	// !_DEBUG

#define	VERIFY(f)	((void)(f))
#define TRACE		1 ? (void)0 : Trace0DBFB266_B244_11D3_A459_000629B2F85

#endif	// _DEBUG

#endif	// _MFC_VER

#ifdef	_DEBUG

#define	DBG(f)	(f)
#define	BREAK()	DebugBreak()
#define INFO(f)	TRACE("%s (%d): ", __FILE__, __LINE__); TRACE(f); TRACE("\n")

class CDogTag
{
public:
	CDogTag() { _this = this; }
	CDogTag(const CDogTag& copy) { _this = this; ASSERT(copy.IsValid()); }
	~CDogTag() { ASSERT(IsValid()); _this = 0; }

	CDogTag& operator=(const CDogTag& rhs)
		{ ASSERT(IsValid() && rhs.IsValid()); return *this; }

	bool IsValid() const { return _this == this; }

private:
   const CDogTag *_this;
};

#define DECL_DOG_TAG(dogTag) CDogTag dogTag;
#define CHECK_DOG_TAG(dogTag) ASSERT((dogTag).IsValid());

#else	// !_DEBUG

#define	DBG(f)
#define	BREAK()
#define INFO(f)

#define DECL_DOG_TAG(dogTag)
#define CHECK_DOG_TAG(dogTag) ((void)0)

#endif	// _DEBUG

#endif	// !defined(_DEBUG_H_0DBFB267_B244_11D3_A459_000629B2F85_INCLUDED_)