/////////////////////////////////////////////////////////////////////////////
-// Name: debug.h
+// Name: wx/debug.h
// Purpose: Misc debug functions and macros
// Author: Vadim Zeitlin
// Modified by:
// Created: 29/01/98
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence: wxWindows license
+// Licence: wxWindows license
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DEBUG_H_
#include <assert.h>
+#include "wx/wxchar.h"
+
// ----------------------------------------------------------------------------
-/**
- @name Debugging macros
-
- All debugging macros rely on ASSERT() which in turn calls user-defined
- OnAssert() function. To keep things simple, it's called even when the
- expression is TRUE (i.e. everything is ok) and by default does nothing: just
- returns the same value back. But if you redefine it to do something more sexy
- (popping up a message box in your favourite GUI, sending you e-mail or
- whatever) it will affect all ASSERTs, FAILs and CHECKs in your code.
- <BR>
- <BR>
- <b>Warning</b>: if you don't like advices on programming style, don't read
- further! ;-)
- <BR>
- <BR>
- Extensive use of these macros is recommended! Remember that ASSERTs are
- disabled in final (without WXDEBUG defined) build, so they add strictly
- nothing to your program's code. On the other hand, CHECK macros do stay
- even in release builds, but in general are not much of a burden, while
- a judicious use of them might increase your program's stability.
-
- @memo Debugging macros (replacement for standard assert()) and more.
- */
+// Debugging macros
+//
+// All debugging macros rely on ASSERT() which in turn calls user-defined
+// OnAssert() function. To keep things simple, it's called even when the
+// expression is TRUE (i.e. everything is ok) and by default does nothing: just
+// returns the same value back. But if you redefine it to do something more sexy
+// (popping up a message box in your favourite GUI, sending you e-mail or
+// whatever) it will affect all ASSERTs, FAILs and CHECKs in your code.
+//
+// Warning: if you don't like advices on programming style, don't read
+// further! ;-)
+//
+// Extensive use of these macros is recommended! Remember that ASSERTs are
+// disabled in final (without __WXDEBUG__ defined) build, so they add strictly
+// nothing to your program's code. On the other hand, CHECK macros do stay
+// even in release builds, but in general are not much of a burden, while
+// a judicious use of them might increase your program's stability.
// ----------------------------------------------------------------------------
-//@{
-/** @name Macros which are completely disabled in 'release' mode */
-//@{
+// Use of these suppresses compiler warnings about testing constant expression
+WXDLLEXPORT_DATA(extern const bool) wxTrue;
+WXDLLEXPORT_DATA(extern const bool) wxFalse;
+
+// Macros which are completely disabled in 'release' mode
+//
+// NB: these functions are implemented in src/common/appcmn.cpp
#ifdef __WXDEBUG__
- /**
- this function may be redefined to do something non trivial and is called
- whenever one of debugging macros fails (i.e. condition is false in an
- assertion)
- @param szFile and nLine - file name and line number of the ASSERT
- szMsg - optional message explaining the reason
+ /*
+ this function may be redefined to do something non trivial and is called
+ whenever one of debugging macros fails (i.e. condition is false in an
+ assertion)
+
+ parameters:
+ szFile and nLine - file name and line number of the ASSERT
+ szMsg - optional message explaining the reason
+ */
+ extern void WXDLLEXPORT wxOnAssert(const wxChar *szFile,
+ int nLine,
+ const wxChar *szMsg = NULL);
+
+ // call this function to break into the debugger uncodnitionally (assuming
+ // the program is running under debugger, of course)
+ extern void WXDLLEXPORT wxTrap();
+
+ /*
+ notice the usage of else at the end of wxASSERT macro: this ensures that
+ the following code
+
+ if ( ... )
+ wxASSERT(...);
+ else
+ ...
+
+ works like expected: if there were no "else", the one in the code above
+ would be matched with a wrong "if"
*/
- void wxOnAssert(const char *szFile, int nLine, const char *szMsg = NULL);
- /// generic assert macro
- #define wxASSERT(cond) if ( !(cond) ) wxOnAssert(__FILE__, __LINE__)
- /// assert with additional message explaining it's cause
- #define wxASSERT_MSG(x, m) if ( !(x) ) wxOnAssert(__FILE__, __LINE__, m)
+ // generic assert macro
+ #define wxASSERT(cond) if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__); else
+
+ // assert with additional message explaining it's cause
+ #define wxASSERT_MSG(cond, msg) \
+ if ( !(cond) ) wxOnAssert(__TFILE__, __LINE__, msg); else
+
+ // an assert helper used to avoid warning when testing constant expressions,
+ // i.e. wxASSERT( sizeof(int) == 4 ) can generate a compiler warning about
+ // expression being always true, but not using
+ // wxASSERT( wxAssertIsEqual(sizeof(int), 4) )
+ extern bool WXDLLEXPORT wxAssertIsEqual(int x, int y);
#else
+ #define wxTrap()
+
// nothing to do in release modes (hopefully at this moment there are
// no more bugs ;-)
- #define wxASSERT(cond)
- #define wxASSERT_MSG(x, m)
-#endif //WXDEBUG
+ #define wxASSERT(cond)
+ #define wxASSERT_MSG(x, m)
+#endif //__WXDEBUG__
+
+// special form of assert: always triggers it (in debug mode)
+#define wxFAIL wxASSERT(wxFalse)
- /// special form of assert: always triggers it (in debug mode)
-#define wxFAIL wxASSERT(0)
- /// FAIL with some message
-#define wxFAIL_MSG(msg) wxASSERT_MSG(0, msg)
-//@}
+// FAIL with some message
+#define wxFAIL_MSG(msg) wxASSERT_MSG(wxFalse, msg)
-// NB: these macros work also in release mode!
+// NB: the following macros work also in release mode!
-/**
+/*
These macros must be used only in invalid situation: for example, an
invalid parameter (NULL pointer) is passed to a function. Instead of
dereferencing it and causing core dump the function might try using
CHECK( p != NULL ) or CHECK( p != NULL, return LogError("p is NULL!!") )
-
- @name Macros which remain even in 'release' mode
*/
-//@{
- /// check that expression is true, "return" if not (also FAILs in debug mode)
-#define wxCHECK(x, rc) if (!(x)) {wxFAIL; return rc; }
- /// as wxCHECK but with a message explaining why we fail
-#define wxCHECK_MSG(x, rc, msg) if (!(x)) {wxFAIL_MSG(msg); return rc; }
- /// check that expression is true, perform op if not
-#define wxCHECK2(x, op) if (!(x)) {wxFAIL; op; }
- /// as wxCHECK2 but with a message explaining why we fail
-#define wxCHECK2_MSG(x, op, msg) if (!(x)) {wxFAIL_MSG(msg); op; }
- /// special form of wxCHECK2: as wxCHECK, but for use in void functions
- // NB: there is only one form (with msg parameter) and it's intentional:
- // there is no other way to tell the caller what exactly went wrong
- // from the void function (of course, the function shouldn't be void
- // to begin with...)
-#define wxCHECK_RET(x, msg) if (!(x)) {wxFAIL_MSG(msg); return; }
-//@}
-
-//@}
+
+// check that expression is true, "return" if not (also FAILs in debug mode)
+#define wxCHECK(x, rc) if (!(x)) {wxFAIL; return rc; }
+
+// as wxCHECK but with a message explaining why we fail
+#define wxCHECK_MSG(x, rc, msg) if (!(x)) {wxFAIL_MSG(msg); return rc; }
+
+// check that expression is true, perform op if not
+#define wxCHECK2(x, op) if (!(x)) {wxFAIL; op; }
+
+// as wxCHECK2 but with a message explaining why we fail
+#define wxCHECK2_MSG(x, op, msg) if (!(x)) {wxFAIL_MSG(msg); op; }
+
+// special form of wxCHECK2: as wxCHECK, but for use in void functions
+//
+// NB: there is only one form (with msg parameter) and it's intentional:
+// there is no other way to tell the caller what exactly went wrong
+// from the void function (of course, the function shouldn't be void
+// to begin with...)
+#define wxCHECK_RET(x, msg) if (!(x)) {wxFAIL_MSG(msg); return; }
#endif // _WX_DEBUG_H_
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