111 lines
2.5 KiB
C++
111 lines
2.5 KiB
C++
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/***
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*oldexcpt.cpp - defines C++ standard exception classes
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*
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* Copyright (c) 1994-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Implementation of C++ standard exception classes, as specified in
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* [lib.header.exception] (section 17.3.2 of 5/27/94 WP):
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*
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* exception (formerly xmsg)
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* logic
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* domain
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* runtime
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* range
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* alloc
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*
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*Revision History:
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* 04-27-94 BES Module created.
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* 10-17-94 BWT Disable code for PPC.
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* 02-15-95 JWM Minor cleanups related to Olympus bug 3716
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* 07-02-95 JWM Now generally ANSI-compliant; excess baggage removed.
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* 01-05-99 GJF Changes for 64-bit size_t.
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*
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*******************************************************************************/
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#include <stdlib.h>
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#include <string.h>
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#include <eh.h>
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#include "./oldexcpt.h"
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////////////////////////////////////////////////////////////////////////////////
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//
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// Implementation of class "exception"
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//
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//
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// Default constructor - initialize to blank
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//
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exception::exception ()
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{
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_m_what = NULL;
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_m_doFree = 0;
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}
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//
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// Standard constructor: initialize with copy of string
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//
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exception::exception ( const __exString& what )
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{
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_m_what = new char[(unsigned int)strlen(what)+1];
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if ( _m_what != NULL )
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strcpy( (char*)_m_what, what );
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_m_doFree = 1;
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}
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//
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// Copy constructor
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//
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exception::exception ( const exception & that )
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{
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_m_doFree = that._m_doFree;
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if (_m_doFree)
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{
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_m_what = new char[(unsigned int)strlen(that._m_what) + 1];
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if (_m_what != NULL)
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strcpy( (char*)_m_what, that._m_what );
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}
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else
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_m_what = that._m_what;
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}
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//
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// Assignment operator: destruct, then copy-construct
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//
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exception& exception::operator=( const exception& that )
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{
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if (this != &that)
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{
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this->exception::~exception();
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this->exception::exception(that);
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}
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return *this;
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}
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//
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// Destructor: free the storage used by the message string if it was
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// dynamicly allocated
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//
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exception::~exception()
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{
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if (_m_doFree)
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delete[] (char*)_m_what;
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}
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//
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// exception::what
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// Returns the message string of the exception.
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// Default implementation of this method returns the stored string if there
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// is one, otherwise returns a standard string.
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//
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__exString exception::what() const
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{
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if ( _m_what != NULL )
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return _m_what;
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else
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return "Unknown exception";
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}
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