SEH and C++ Exceptions，自定义CSeException

Description of CSeException

CSeException class is based on CException class provided by MFC. I overwrite some of useful methods, but it is working same way like any other exception class based on CException class - you can find description in documentation provided by Visual C++.

By Martin Ziacek

Source Files :

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1. //////////////////////////////////////////////////////////////////////////
2. // SeException.h    By Martin Ziacek
3. #ifndef __SEEXCEPTION_H__
4. #define __SEEXCEPTION_H__
5. class CSeException : public CException
6. {
7. DECLARE_DYNAMIC(CSeException)
8. public:
9. CSeException(UINT nSeCode, _EXCEPTION_POINTERS* pExcPointers);
10. CSeException(CSeException & CseExc);
11. _EXCEPTION_POINTERS* GetSePointers(void);
12. PVOID GetExceptionAddress(void);
13. UINT GetSeCode(void);
14. void Delete(void);
15. int  ReportError(UINT nType = MB_OK, UINT nIDHelp = 0);
16. BOOL GetErrorMessage(CString & CsErrDescr, PUINT pnHelpContext = NULL);
17. BOOL GetErrorMessage(LPTSTR lpszError, UINT nMaxError, PUINT pnHelpContext = NULL);
18. private:
19. UINT                    m_nSeCode;
20. _EXCEPTION_POINTERS*    m_pExcPointers;
21. };
22. void SeTranslator(UINT nSeCode, _EXCEPTION_POINTERS* pExcPointers);
23. #endif //__SEEXCEPTION_H__

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1. //////////////////////////////////////////////////////////////////////////
2. // SeException.cpp  By Martin Ziacek
3. #include "stdafx.h"
4. #include "SeException.h"
5. #ifdef _DEBUG
6. #define new DEBUG_NEW
7. #endif
8. #undef THIS_FILE
9. static char THIS_FILE[] = __FILE__;
10. #define CASE(nSeCode,CsString) case EXCEPTION_##nSeCode: /
11. CsString.Format(_T("Exception %s (0x%.8x) at address 0x%.8x."),_T(#nSeCode),EXCEPTION_##nSeCode,m_pExcPointers->ExceptionRecord->ExceptionAddress); /
12. break;
13. void SeTranslator(UINT nSeCode, _EXCEPTION_POINTERS* pExcPointers)
14. {
15. throw new CSeException(nSeCode,pExcPointers);
16. }
17. IMPLEMENT_DYNAMIC(CSeException,CException)
18. CSeException::CSeException(UINT nSeCode, _EXCEPTION_POINTERS* pExcPointers)
19. {
20. m_nSeCode = nSeCode;
21. m_pExcPointers = pExcPointers;
22. }
23. CSeException::CSeException(CSeException & CseExc)
24. {
25. m_nSeCode = CseExc.m_nSeCode;
26. m_pExcPointers = CseExc.m_pExcPointers;
27. }
28. UINT CSeException::GetSeCode()
29. {
30. return m_nSeCode;
31. }
32. _EXCEPTION_POINTERS* CSeException::GetSePointers()
33. {
34. return m_pExcPointers;
35. }
36. PVOID CSeException::GetExceptionAddress()
37. {
38. return m_pExcPointers->ExceptionRecord->ExceptionAddress;
39. }
40. void CSeException::Delete(void)
41. {
42. #ifdef _DEBUG
43. m_bReadyForDelete = TRUE;
44. #endif
45. delete this;
46. }
47. int CSeException::ReportError(UINT nType/* = MB_OK*/, UINT nIDHelp/* = 0*/)
48. {
49. int rc;
50. CString strMessage;
51. GetErrorMessage(strMessage);
52. rc = AfxMessageBox(strMessage,nType,nIDHelp);
53. return rc;
54. }
55. BOOL CSeException::GetErrorMessage(CString & CsErrDescr, PUINT pnHelpContext/* = NULL*/)
56. {
57. BOOL rc = TRUE;
58. if (pnHelpContext != NULL)
59. *pnHelpContext = 0;
60. switch (m_nSeCode)    {
61. CASE(ACCESS_VIOLATION,CsErrDescr);
62. CASE(DATATYPE_MISALIGNMENT,CsErrDescr);
63. CASE(BREAKPOINT,CsErrDescr);
64. CASE(SINGLE_STEP,CsErrDescr);
65. CASE(ARRAY_BOUNDS_EXCEEDED,CsErrDescr);
66. CASE(FLT_DENORMAL_OPERAND,CsErrDescr);
67. CASE(FLT_DIVIDE_BY_ZERO,CsErrDescr);
68. CASE(FLT_INEXACT_RESULT,CsErrDescr);
69. CASE(FLT_INVALID_OPERATION,CsErrDescr);
70. CASE(FLT_OVERFLOW,CsErrDescr);
71. CASE(FLT_STACK_CHECK,CsErrDescr);
72. CASE(FLT_UNDERFLOW,CsErrDescr);
73. CASE(INT_DIVIDE_BY_ZERO,CsErrDescr);
74. CASE(INT_OVERFLOW,CsErrDescr);
75. CASE(PRIV_INSTRUCTION,CsErrDescr);
76. CASE(IN_PAGE_ERROR,CsErrDescr);
77. CASE(ILLEGAL_INSTRUCTION,CsErrDescr);
78. CASE(NONCONTINUABLE_EXCEPTION,CsErrDescr);
79. CASE(STACK_OVERFLOW,CsErrDescr);
80. CASE(INVALID_DISPOSITION,CsErrDescr);
81. CASE(GUARD_PAGE,CsErrDescr);
82. CASE(INVALID_HANDLE,CsErrDescr);
83. default:
84. CsErrDescr = _T("Unknown exception.");
85. rc = FALSE;
86. break;
87. }
88. return rc;
89. }
90. BOOL CSeException::GetErrorMessage(LPTSTR lpszError, UINT nMaxError, PUINT pnHelpContext/* = NULL*/)
91. {
92. ASSERT(lpszError != NULL && AfxIsValidString(lpszError, nMaxError));
93. if (pnHelpContext != NULL)
94. *pnHelpContext = 0;
95. CString strMessage;
96. GetErrorMessage(strMessage);
97. if ((UINT)strMessage.GetLength() >= nMaxError) {
98. lpszError[0] = 0;
99. return FALSE;
100. } else {
101. lstrcpyn(lpszError, strMessage, nMaxError);
102. return TRUE;
103. }
104. }

Demo Project:

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1. void CSehDemoDlg::OnBtnCreateException()
2. {
3. char *p = NULL;
4. try
5. {
6. p[0] = 0;
7. }
8. catch(CSeException *e)
9. {
10. TCHAR trcMsg[1024];
11. e->GetErrorMessage(trcMsg,1024);
12. TRACE(trcMsg);
13. TRACE(_T("/n"));
14. e->ReportError(MB_OK | MB_ICONSTOP);
15. e->Delete();
16. }
17. }

The Result:

From: http://www.codeproject.com/KB/cpp/seexception.aspx

http://blog.csdn.net/wangningyu/article/details/4579127