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命令行程序框架之ShellImpl.h

界面效果如下:
 

 出自:- http://www.cppblog.com/aaxron 转载必须注明!

#pragma once
#include 
<string>
#include 
<algorithm>
#include 
<functional>
using namespace std;

template
<typename T>
class CShellImpl
{
public:
    CShellImpl(
void)
    {
        m_nCmdRet 
= 0;
        m_strCmdPrompt 
= ">>>";
        m_strCmdNotFound 
= "command not found";
        InitInternalCmd();
    }
    
virtual ~CShellImpl(void)
    {

    }

    typedef BOOL (T::
*CMDPROC)(int argc,const vector<string>* argv);
    typedef 
struct __tag_CMD_ENTRY
    { 
        
string strCmd;
        
string strCmdUsage; 
        
string strCmdDesc;
        CMDPROC pfCmdProc;
    }CMD_ENTRY; 

    
void AddCmd(TCHAR* pszCmd,TCHAR* pszCmdUsage,TCHAR* pszCmdDesc,CMDPROC pfProc)
    {
        CMD_ENTRY cmdEntry;
        cmdEntry.strCmd            
= pszCmd;
        cmdEntry.strCmdUsage    
= pszCmdUsage;
        cmdEntry.strCmdDesc        
= pszCmdDesc;
        cmdEntry.pfCmdProc        
= pfProc;
        m_ExternalCmdEntrys.push_back(cmdEntry);
    }

private:
    
void AddInternalCmd(TCHAR* pszCmd,TCHAR* pszCmdUsage,TCHAR* pszCmdDesc,CMDPROC pfProc)
    {
        CMD_ENTRY cmdEntry;
        cmdEntry.strCmd            
= pszCmd;
        cmdEntry.strCmdUsage    
= pszCmdUsage;
        cmdEntry.strCmdDesc        
= pszCmdDesc;
        cmdEntry.pfCmdProc        
= pfProc;
        m_InternalCmdEntrys.push_back(cmdEntry);
    }

    
void InitInternalCmd()
    {
        AddInternalCmd(
"?","","Show All Commands",&T::CmdShowAllCmd);
        AddInternalCmd(
"quit","","Quit",&T::CmdQuit);
        AddInternalCmd(
"clear","","Clear Screen",&T::CmdClear);
        AddInternalCmd(
"echo","","Echo Var Value",&T::CmdEcho);
    }


    
int ShowCmdHelp(int argc,const vector<string>* argv)
    {
        
    }

    
int CmdEcho(int argc,const vector<string>* argv)
    {
        printf(
"%d\r\n",m_nCmdRet);
        
return 0;
    }

    
int CmdClear(int argc,const vector<string>* argv)
    {
        HANDLE hOutput;
        DWORD dwWritten;
        COORD coord;
        CONSOLE_SCREEN_BUFFER_INFO csbi;

        
// Open the currently active screen buffer 
        hOutput = CreateFile(TEXT("CONOUT$"),
            GENERIC_WRITE
|GENERIC_READ,
            FILE_SHARE_READ
|FILE_SHARE_WRITE,
            NULL,
            OPEN_EXISTING,
            
0,
            NULL);

        
if (INVALID_HANDLE_VALUE == hOutput)
            
return GetLastError();

        
// Get the screen buffer information 
        GetConsoleScreenBufferInfo(hOutput, &csbi);

        coord.X 
= coord.Y = 0;

        
// Clear the screen in the most efficient way 
        FillConsoleOutputCharacter(hOutput, (TCHAR)' ', csbi.dwSize.Y*csbi.dwSize.X, coord, &dwWritten);

        
// Move to (0,0) 
        SetConsoleCursorPosition(hOutput, coord);

        
// Close the handle 
        CloseHandle(hOutput);
        
return 0;
    }
    
    
int CmdQuit(int argc,const vector<string>* argv)
    {
        exit(
0);
    }

    
int CmdShowAllCmd(int argc,const vector<string>* argv)
    {
        
//查找内部命令
        for (int i=0;i<m_InternalCmdNums;i++)
        {
            cout
<<setiosflags(ios::left)<<setw(32);
            
if (m_InternalCmdEntrys[i].strCmdUsage.empty())
            {
                cout
<<m_InternalCmdEntrys[i].strCmd;
            }
            
else{
                cout
<<m_InternalCmdEntrys[i].strCmdUsage;
            }
            cout
<<m_InternalCmdEntrys[i].strCmdDesc<<endl;
        }

        
//查找外部命令
        for (int i=0;i<m_ExternalCmdNums;i++)
        {
            cout
<<setiosflags(ios::left)<<setw(32);
            
if (m_ExternalCmdEntrys[i].strCmdUsage.empty())
            {
                cout
<<m_ExternalCmdEntrys[i].strCmd;
            }
            
else{
                cout
<<m_ExternalCmdEntrys[i].strCmdUsage;
            }
            cout
<<m_ExternalCmdEntrys[i].strCmdDesc<<endl;
        }
        
return 0;
    }

    inline 
void ShowCmdPrompt(BOOL bListStyle=TRUE)
    {
        printf(m_strCmdPrompt.c_str());
    }

    inline 
void ShowCmdNotFound()
    {
        puts(m_strCmdNotFound.c_str());
        
    }

    inline 
void SetCmdPrompt(const char* szCmdPrompt)
    {
        m_strCmdPrompt 
= szCmdPrompt;
    }

    inline 
void SetCmdNotFound(const char* szCmdNotFound)
    {
        m_strCmdNotFound 
= szCmdNotFound;
    }


public:
    
void ProcCmdLoop()
    {
        
string strInput;
        
string strCmd;
        
        BOOL doNextLoop 
= TRUE;
        BOOL bCmdNotFound 
= TRUE;
        vector
<string> argv;
        
int argc = 0;
        
        m_InternalCmdNums 
= m_InternalCmdEntrys.size();
        m_ExternalCmdNums 
= m_ExternalCmdEntrys.size();

        
while(doNextLoop)
        {
            ShowCmdPrompt();
            getline(cin,strInput);

            Trim(strInput);
            
            
//命令为空
            if (strInput.empty())
            {
                
continue;
            }
            argc 
= CmdLineToArgv(strInput.c_str(),argv);
            strCmd 
= argv[0];

            
if (strCmd == "?")
            {
                CmdShowAllCmd(argc,NULL);
                
continue;
            }

            bCmdNotFound 
= TRUE;

            
//查找内部命令
            for (int i=0;i<m_InternalCmdNums;i++)
            {
                
if (m_InternalCmdEntrys[i].strCmd == strCmd)
                {
                    m_nCmdRet 
= (((T*)this)->*m_InternalCmdEntrys[i].pfCmdProc)(argc,&argv);
                    bCmdNotFound 
= FALSE;
                    
break;
                }
            }

            
//命令不存在
            if (bCmdNotFound)
            {
                
//查找外部命令
                for (int i=0;i<m_ExternalCmdNums;i++)
                {
                    
if (m_ExternalCmdEntrys[i].strCmd == strCmd)
                    {
                        m_nCmdRet 
= (((T*)this)->*m_ExternalCmdEntrys[i].pfCmdProc)(argc,&argv);
                        bCmdNotFound 
= FALSE;
                        
break;
                    }
                }
            }

            
//命令不存在
            if (bCmdNotFound)
            {
                ShowCmdNotFound();
            }
        }
    }

    
string& TrimLeft(string &strInput)     
    {     
        
string::iterator p=find_if(strInput.begin(),strInput.end(),not1(ptr_fun(isspace)));     
        strInput.erase(strInput.begin(),p);     
        
return strInput;
    }     

    
string&  TrimRight(string &strInput)     
    {     
        
string::reverse_iterator p=find_if(strInput.rbegin(),strInput.rend(),not1(ptr_fun(isspace)));     
        strInput.erase(p.
base(),strInput.end());     
        
return strInput;     
    }     

    inline 
string& Trim(string &strInput)     
    {     
        TrimLeft(TrimRight(strInput));     
        
return strInput;     
    }

    DWORD CmdLineToArgv(
const char* szCmdLine,std::vector<std::string>& argv)
    {
        LPWSTR 
*szArglist;
        
int argc;
        szArglist 
= CommandLineToArgvW(CA2W(szCmdLine),&argc);
        argv.clear();
        
if( NULL == szArglist )
        {
            
return 0;
        }
        
for(int i=0; i<argc; i++
        {
            argv.push_back((LPCSTR)CW2A(szArglist[i]));
        }
        LocalFree(szArglist);
        
return argc;
    }

private:
    vector
<CMD_ENTRY>    m_ExternalCmdEntrys;    //外部命令

private:
    vector
<CMD_ENTRY>    m_InternalCmdEntrys;    //内部命令
    string                m_strCmdPrompt;
    
string                m_strCmdNotFound;
    
int                    m_nCmdRet;

    DWORD                m_InternalCmdNums;
    DWORD                m_ExternalCmdNums;
};


调用部分:

//main.cpp
#include "stdafx.h"
#include 
"ShellImpl.h"

class MyShell:public CShellImpl<MyShell>
{
public:
    
int ProcCmdOpen(int argc,const vector<string>* argv)
    {
        puts(argv
->at(0).c_str());
        system(
"pause");
        
return TRUE;
    }
};



int _tmain(int argc, _TCHAR* argv[])
{
    MyShell shell;
    shell.AddCmd(
"open","open <ip> [devid] [port]","open a remote device",&MyShell::ProcCmdOpen);
    shell.ProcCmdLoop();
    
return 0;
}




posted on 2012-03-14 09:27 天下 阅读(392) 评论(0)  编辑 收藏 引用 所属分类: C/C++


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