зеркало из https://github.com/mozilla/gecko-dev.git
375 строки
12 KiB
C++
375 строки
12 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsDebug_h___
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#define nsDebug_h___
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#ifndef nscore_h___
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#include "nscore.h"
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#endif
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#ifndef nsError_h__
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#include "nsError.h"
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#endif
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#ifdef DEBUG
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#define NS_DEBUG
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#endif
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/**
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* Namespace for debugging methods. Note that your code must use the
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* macros defined later in this file so that the debug code can be
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* conditionally compiled out.
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*/
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/* in case this is included by a C file */
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#ifdef __cplusplus
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class nsDebug {
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public:
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/**
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* When called, this will log a fatal abort message (to stderr and
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* to the NSPR log file) and then abort the program. This is
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* used by the NS_ABORT_IF_FALSE macro below when debugging is
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* enabled.
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*/
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static NS_COM void AbortIfFalse(const char* aStr, const char* aExpr,
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const char* aFile, PRIntn aLine);
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/**
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* Log a warning message when an expression is not true. Used by
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* the NS_WARN_IF_FALSE macro below when debugging is enabled.
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*
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* The default behavior of this method is print a message to stderr
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* and to log an event in the NSPR log file.
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*/
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static NS_COM PRBool WarnIfFalse(const char* aStr, const char* aExpr,
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const char* aFile, PRIntn aLine);
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/**
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* Enable flying a warning message box (if the platform supports
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* such a thing) when WarnIfFalse is called in addition to
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* the usual printing to stderr and the NSPR log file.
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*
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* If aOnOff is PR_TRUE then the message-box is enabled, otherwise
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* the message-box is disabled.
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*
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* The default state for the message-box enable is "off".
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*
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* Note also that the implementation looks at an environment
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* variable (for those platforms that have environment variables...)
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* called MOZ_WARNING_MESSAGE_BOX that when set enables the
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* warning message box by default.
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*/
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static NS_COM void SetWarningMessageBoxEnable(PRBool aOnOff);
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/**
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* Get the current setting of the message-box enable.
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*/
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static NS_COM PRBool GetWarningMessageBoxEnable(void);
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// Note: Methods below this line are the old ones; please start using
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// the new ones. The old ones will be removed eventually!
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//////////////////////////////////////////////////////////////////////
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// XXX add in log controls here
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// XXX probably want printf type arguments
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/**
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* Abort the executing program. This works on all architectures.
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*/
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static NS_COM void Abort(const char* aFile, PRIntn aLine);
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/**
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* Break the executing program into the debugger.
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*/
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static NS_COM void Break(const char* aFile, PRIntn aLine);
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/**
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* Log a pre-condition message to the debug log
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*/
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static NS_COM void PreCondition(const char* aStr, const char* aExpr,
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const char* aFile, PRIntn aLine);
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/**
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* Log a post-condition message to the debug log
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*/
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static NS_COM void PostCondition(const char* aStr, const char* aExpr,
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const char* aFile, PRIntn aLine);
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/**
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* Log an assertion message to the debug log
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*/
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static NS_COM void Assertion(const char* aStr, const char* aExpr,
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const char* aFile, PRIntn aLine);
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/**
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* Log a not-yet-implemented message to the debug log
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*/
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static NS_COM void NotYetImplemented(const char* aMessage,
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const char* aFile, PRIntn aLine);
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/**
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* Log a not-reached message to the debug log
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*/
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static NS_COM void NotReached(const char* aMessage,
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const char* aFile, PRIntn aLine);
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/**
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* Log an error message to the debug log. This call returns.
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*/
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static NS_COM void Error(const char* aMessage,
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const char* aFile, PRIntn aLine);
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/**
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* Log a warning message to the debug log.
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*/
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static NS_COM void Warning(const char* aMessage,
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const char* aFile, PRIntn aLine);
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};
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#ifdef DEBUG
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/**
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* Abort the execution of the program if the expresion evaluates to
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* false.
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*
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* There is no status value returned from the macro.
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*
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* Note that the non-debug version of this macro does <b>not</b>
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* evaluate the expression argument. Hence side effect statements
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* as arguments to the macro will yield improper execution in a
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* non-debug build. For example:
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*
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* NS_ABORT_IF_FALSE(0 == foo++, "yikes foo should be zero");
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*
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* Note also that the non-debug version of this macro does <b>not</b>
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* evaluate the message argument.
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*/
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#define NS_ABORT_IF_FALSE(_expr,_msg) \
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PR_BEGIN_MACRO \
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if (!(_expr)) { \
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nsDebug::AbortIfFalse(_msg, #_expr, __FILE__, __LINE__); \
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} \
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PR_END_MACRO
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/**
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* Warn if a given condition is false.
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*
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* Program execution continues past the usage of this macro.
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*
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* The macro returns a status value that can be used in an "if"
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* statement. For example:
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*
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* if (NS_WARN_IF_FALSE(aPtr, "null pointer")) {
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* return NS_ERROR_NULL_POINTER;
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* }
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*
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* Note that the non-debug version of this macro <b>does</b> evaluate
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* the expression as this macro continues to return a boolean
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* value. Therefore side effect expressions will work
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* correctly. However, they are still "poor form" so don't do it!
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*
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* Note also that the non-debug version of this macro does <b>not</b>
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* evaluate the message argument.
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*/
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#define NS_WARN_IF_FALSE(_e,_msg) \
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(!(_e) ? nsDebug::WarnIfFalse(_msg, #_e, __FILE__, __LINE__) : PR_FALSE)
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// Note: Macros below this line are the old ones; please start using
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// the new ones. The old ones will be removed eventually!
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//////////////////////////////////////////////////////////////////////
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/**
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* Test a precondition for truth. If the expression is not true then
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* trigger a program failure.
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*/
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#define NS_PRECONDITION(expr,str) \
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if (!(expr)) \
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nsDebug::PreCondition(str, #expr, __FILE__, __LINE__)
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/**
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* Test an assertion for truth. If the expression is not true then
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* trigger a program failure.
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*/
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#define NS_ASSERTION(expr,str) \
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if (!(expr)) \
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nsDebug::Assertion(str, #expr, __FILE__, __LINE__)
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/**
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* Test an assertion for truth. If the expression is not true then
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* trigger a program failure. The expression will still be
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* executed in release mode.
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*/
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#define NS_VERIFY(expr,str) \
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if (!(expr)) \
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nsDebug::Assertion(str, #expr, __FILE__, __LINE__)
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/**
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* Test a post-condition for truth. If the expression is not true then
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* trigger a program failure.
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*/
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#define NS_POSTCONDITION(expr,str) \
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if (!(expr)) \
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nsDebug::PostCondition(str, #expr, __FILE__, __LINE__)
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/**
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* This macros triggers a program failure if executed. It indicates that
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* an attempt was made to execute some unimplimented functionality.
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*/
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#define NS_NOTYETIMPLEMENTED(str) \
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nsDebug::NotYetImplemented(str, __FILE__, __LINE__)
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/**
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* This macros triggers a program failure if executed. It indicates that
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* an attempt was made to execute some unimplimented functionality.
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*/
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#define NS_NOTREACHED(str) \
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nsDebug::NotReached(str, __FILE__, __LINE__)
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/**
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* Log an error message.
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*/
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#define NS_ERROR(str) \
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nsDebug::Error(str, __FILE__, __LINE__)
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/**
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* Log a warning message.
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*/
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#define NS_WARNING(str) \
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nsDebug::Warning(str, __FILE__, __LINE__)
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/**
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* Trigger an abort
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*/
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#define NS_ABORT() \
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nsDebug::Abort(__FILE__, __LINE__)
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/**
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* Cause a break
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*/
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#define NS_BREAK() \
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nsDebug::Break(__FILE__, __LINE__)
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#else /* NS_DEBUG */
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/**
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* The non-debug version of this macro does not evaluate the
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* expression or the message arguments to the macro.
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*/
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#define NS_ABORT_IF_FALSE(_expr,_msg) {}
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/**
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* Note that the non-debug version of this macro <b>does</b> evaluate
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* the expression as this macro continues to return a boolean
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* value.
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*
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* The non-debug version of this macro does <b>not</b> evaluate the
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* message argument.
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*/
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#define NS_WARN_IF_FALSE(_e,_msg) \
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(!(_e) ? PR_TRUE : PR_FALSE)
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#define NS_PRECONDITION(expr,str) {}
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#define NS_ASSERTION(expr,str) {}
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#define NS_VERIFY(expr,str) expr
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#define NS_POSTCONDITION(expr,str) {}
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#define NS_NOTYETIMPLEMENTED(str) {}
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#define NS_NOTREACHED(str) {}
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#define NS_ERROR(str) {}
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#define NS_WARNING(str) {}
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#define NS_ABORT() {}
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#define NS_BREAK() {}
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#endif /* ! NS_DEBUG */
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#endif /* __cplusplus */
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// Macros for checking the trueness of an expression passed in within an
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// interface implementation. These need to be compiled regardless of the
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// NS_DEBUG flag
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///////////////////////////////////////////////////////////////////////////////
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#define NS_ENSURE_TRUE(x, ret) \
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PR_BEGIN_MACRO \
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if(NS_WARN_IF_FALSE(x, "NS_ENSURE_TRUE(" #x ") failed")) \
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return ret; \
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PR_END_MACRO
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#define NS_ENSURE_FALSE(x, ret) \
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NS_ENSURE_TRUE(!(x), ret)
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///////////////////////////////////////////////////////////////////////////////
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// Macros for checking results
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///////////////////////////////////////////////////////////////////////////////
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#define NS_ENSURE_SUCCESS(res, ret) \
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NS_ENSURE_TRUE(NS_SUCCEEDED(res), ret)
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///////////////////////////////////////////////////////////////////////////////
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// Macros for checking state and arguments upon entering interface boundaries
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///////////////////////////////////////////////////////////////////////////////
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#define NS_ENSURE_ARG(arg) \
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NS_ENSURE_TRUE(arg, NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_ARG_POINTER(arg) \
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NS_ENSURE_TRUE(arg, NS_ERROR_INVALID_POINTER)
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#define NS_ENSURE_ARG_MIN(arg, min) \
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NS_ENSURE_TRUE((arg) >= min, NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_ARG_MAX(arg, max) \
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NS_ENSURE_TRUE((arg) <= max, NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_ARG_RANGE(arg, min, max) \
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NS_ENSURE_TRUE(((arg) >= min) && ((arg) <= max), NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_STATE(state) \
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NS_ENSURE_TRUE(state, NS_ERROR_UNEXPECTED)
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#define NS_ENSURE_NO_AGGREGATION(outer) \
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NS_ENSURE_FALSE(outer, NS_ERROR_NO_AGGREGATION)
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#define NS_ENSURE_PROPER_AGGREGATION(outer, iid) \
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NS_ENSURE_FALSE(outer && !iid.Equals(NS_GET_IID(nsISupports)), NS_ERROR_INVALID_ARG)
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///////////////////////////////////////////////////////////////////////////////
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#endif /* nsDebug_h___ */
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