[C++][Error Code]如何定义Error Code框架

Love The Way You Lie 2022-04-16 02:56 358阅读 0赞

对于不同的项目而言，error code返回机制是不一样的，但是能够很好的管理好不同模块间的Error Code并不是一件简单的事情，下面有一种比较简便的方法如下：

/**************************************************************************************************/
    /*!
        \file CommonErrors.h
    
        \attention
            (c) Jacky Dai 2011~2016
            All Rights Reserved.
    */
    
    /**************************************************************************************************/
    
    #ifndef XX_COMMON_ERRORS_H
    #define XX_COMMON_ERRORS_H
    
    /*** Include Files ********************************************************************************/
    
    /*** Defines/Macros/Constants/Typedefs ************************************************************/
    
    namespace XXSpace
    {
       
    //basic mask code
    const unsigned int COMPONENT_MASK       = 0x8000;
    
    //component code
    const unsigned int COMPONENT_LOGIN            = 0x0001;
    const unsigned int COMPONENT_DATAMANAGER      = 0x0002;
    
    //
    //0x0000XXXX:XXXX means component code
    //0xXXXX0000:XXXX means error code of component
    
    //Define some marcos/functions here
    #define SYSTEM_ERROR_FLAG (0x4000)
    #define SYSTEM_ERROR(code) ((code | SYSTEM_ERROR_FLAG) << 16)
    #define ERROR_IS_SYSTEM_ERROR(err) (((err >> 16) & SYSTEM_ERROR_FLAG) != 0)
    
    #define COMPONENT_ERROR(component, code) ((code << 16) | (component & ~(COMPONENT_MASK)))
    #define CODE_FROM_ERROR(err) (static_cast<short>(err >> 16))
    
    //All of the error code is here
    typedef enum
    {
       
                                                                                     //   Hex        | Decimal       | Descriptio
        //Basic error
        ERR_OK                                 = 0x00000000,                         //<< 0x00000000 |  0            | No error.
        ERR_SYSTEM                             = SYSTEM_ERROR(1),                    //<< 0x00010000 | 65536         | General system error.
        ERR_TIMEOUT                            = SYSTEM_ERROR(2),                    //<< 0x00020000 | 131072        | Time out.
    
        //login component
        LOGIN_ERROR_UNKNOWN_ERROR              = COMPONENT_ERROR(COMPONENT_LOGIN, 1),     //<< 0x00010001 |65537    | Unrecognized error.
        LOGIN_ERROR_UNKNOWN_USER_NAME          = COMPONENT_ERROR(COMPONENT_LOGIN, 2),     //<< 0x00020001 |131073   | Unrecognized user name, it is case sensitive.
    
        //data manager component
        DATAMANAGER_ERROR_UNKNOWN_ERROR        = COMPONENT_ERROR(COMPONENT_DATAMANAGER, 1), //<< 0x00010002 |65538   | Unrecognized error.
        DATAMANAGER_ERROR_MISSING_CONNECTION   = COMPONENT_ERROR(COMPONENT_DATAMANAGER, 2)  //<< 0x00020002 |131074   | Connection missed.
    } XXCommonError;
    
    
    /**************************************************************************************************/
    /*!
        \class ErrorHelper
    
        Class with commands for translating error codes to useful strings.
    
    */
    /**************************************************************************************************/
    class ErrorHelper
    {
       
    public:
        static const char* getErrorName(XXCommonError error);
        static const char* getErrorDescription(XXCommonError error);
    };
    
    } // XXSpace
    
    #endif //XX_COMMON_ERRORS_H

/**************************************************************************************************/
    /*!
        \file CommonErrors.cpp
    
        \attention
            (c) Jacky Dai 2011~2016
            All Rights Reserved.
    */
    
    /**************************************************************************************************/
    
    /*** Include Files ********************************************************************************/
    #include "CommonErrors.h"
    
    /*** Defines/Macros/Constants/Typedefs ************************************************************/
    
    namespace XXSpace
    {
       
    /*** Public Methods ******************************************************************************/
    const char* ErrorHelper::getErrorName(XXCommonError error)
    {
       
        const char* result = "UKNOWN";
    
        switch (error)
        {
       
            case ERR_OK: result = "ERR_OK"; break;
            case ERR_SYSTEM: result = "ERR_SYSTEM"; break;
            case ERR_TIMEOUT: result = "ERR_TIMEOUT"; break;
            case LOGIN_ERROR_UNKNOWN_ERROR: result = "LOGIN_ERROR_UNKNOWN_ERROR"; break;
            case LOGIN_ERROR_UNKNOWN_USER_NAME: result = "LOGIN_ERROR_UNKNOWN_USER_NAME"; break;
            case DATAMANAGER_ERROR_UNKNOWN_ERROR: result = "DATAMANAGER_ERROR_UNKNOWN_ERROR"; break;
            case DATAMANAGER_ERROR_MISSING_CONNECTION: result = "DATAMANAGER_ERROR_MISSING_CONNECTION"; break;
            default: break;
        }
    
        return result;
    }
    
    const char* ErrorHelper::getErrorDescription(XXCommonError error)
    {
       
        const char *result = "UKNOWN";
    
        switch (error)
        {
       
            case ERR_OK: result = "No error."; break;
            case ERR_SYSTEM: result = "General system error."; break;
            case ERR_TIMEOUT: result = "Time out."; break;
            case LOGIN_ERROR_UNKNOWN_ERROR: result = "Unrecognized error."; break;
            case LOGIN_ERROR_UNKNOWN_USER_NAME: result = "Unrecognized user name, it is case sensitive."; break;
            case DATAMANAGER_ERROR_UNKNOWN_ERROR: result = "Unrecognized error."; break;
            case DATAMANAGER_ERROR_MISSING_CONNECTION: result = "Connection missed."; break;
            default: break;
        }
    
        return result;
    }
    
    } // XXSpace

One sample for this architecture, it's easy to control, isn't it? Any problems, please let me know.

#include <Windows.h>
    #include "CommonErrors.h"
    #include <iostream>
    using namespace std;
    
    
    /**************************************************************************************************/
    /*!
        \class XXStub
    
        Stub class for the XXXX.
    */
    /**************************************************************************************************/
    class Login{};
    class LoginStub : public Login
    {
       
    public:
        typedef enum
        {
       
            ERR_OK                        = XXSpace::ERR_OK,
            ERR_SYSTEM                    = XXSpace::ERR_SYSTEM,
            ERR_TIMEOUT                   = XXSpace::ERR_TIMEOUT,
            LOGIN_ERROR_UNKNOWN_ERROR     = XXSpace::LOGIN_ERROR_UNKNOWN_ERROR,
            LOGIN_ERROR_UNKNOWN_USER_NAME = XXSpace::LOGIN_ERROR_UNKNOWN_USER_NAME
        } Errors;
    
        Errors DoLogin(const char* userName, const char* password);
        const char* GetLoginStubErrorName(Errors error);
        const char* getErrorDescription(Errors error);
    };
    
    LoginStub::Errors LoginStub::DoLogin(const char* userName, const char* password)
    {
       
        if( userName==NULL
         || password==NULL )
        {
       
            return LOGIN_ERROR_UNKNOWN_USER_NAME;
        }        
    
        return ERR_OK;
    }
    
    const char* LoginStub::GetLoginStubErrorName(Errors error)
    {
       
        return XXSpace::ErrorHelper::getErrorName(static_cast<XXSpace::XXCommonError>(error));
    }
    
    const char* LoginStub::getErrorDescription(Errors error)
    {
       
        return XXSpace::ErrorHelper::getErrorDescription(static_cast<XXSpace::XXCommonError>(error));
    }
    
    class DataManager{};
    class DataManagerStub : public DataManager
    {
       
    public:
        typedef enum
        {
       
            ERR_OK                               = XXSpace::ERR_OK,
            ERR_SYSTEM                           = XXSpace::ERR_SYSTEM,
            ERR_TIMEOUT                          = XXSpace::ERR_TIMEOUT,
            DATAMANAGER_ERROR_UNKNOWN_ERROR      = XXSpace::DATAMANAGER_ERROR_UNKNOWN_ERROR,
            DATAMANAGER_ERROR_MISSING_CONNECTION = XXSpace::DATAMANAGER_ERROR_MISSING_CONNECTION
        } Errors;
    
        Errors Test();
        const char* GetDataManagerStubErrorName(Errors error);
        const char* getErrorDescription(Errors error);
    };
    
    DataManagerStub::Errors DataManagerStub::Test()
    {
       
        return DATAMANAGER_ERROR_UNKNOWN_ERROR;
    }
    
    const char* DataManagerStub::GetDataManagerStubErrorName(Errors error)
    {
       
        return XXSpace::ErrorHelper::getErrorName(static_cast<XXSpace::XXCommonError>(error));
    }
    
    const char* DataManagerStub::getErrorDescription(Errors error)
    {
       
        return XXSpace::ErrorHelper::getErrorDescription(static_cast<XXSpace::XXCommonError>(error));
    }
    
    
    //
    void main()
    {
       
        LoginStub cLogin;
        LoginStub::Errors loginError = cLogin.DoLogin(NULL, NULL);
        cout << hex << loginError << " = ";
        cout << cLogin.GetLoginStubErrorName(loginError) << endl;
        cout << cLogin.getErrorDescription(loginError) << endl;
    
        DataManagerStub dm;
        DataManagerStub::Errors dmError = dm.Test();
        cout << hex << dmError << " = ";
        cout << dm.GetDataManagerStubErrorName(dmError) << endl; 
        cout << dm.getErrorDescription(dmError) << endl; 
    }