文件目录的拷贝和删除

前几天需要在Wince上进行文件拷贝， 自己用FindFirstFile 和 FindNextFile 实现了文件、目录的拷贝功能。为了能够在一个函数中同时Copy目录或文件，那么就需要首先判断你给的参数是个目录还是文件，然后进行相应的拷贝或者递归处理。虽然实现的还是有些缺点，比如没有处理给定的目录参数后面带反斜线的情况。

先定义打印log的宏和数组长度

#define RETAILMSG(exp, m)       if (exp) {_tprintf m;}

#define MAX_LENGTH 200

 

1. Copy 文件或目录 ----> 目录

思路： 先判断给定的输入是文件还是目录。如果是文件，则根据目标目录构建目标文件，并调用WinAPI copy文件，然后 return; 如果是目录，遍历该目录下的子文件或子目录，对于子文件拷贝；对于子目录，重新构建目的子目录并递归调用

//This Function can be used to copy source files/dirctory to destination directory
//---Copy source direcotry to destination directory
//---Copy source files to destination directory
BOOL CopyToDirecotry(WCHAR* pwszSourceDirectory,WCHAR* pwszDestDirectory)
{
    BOOL result = TRUE;
    WCHAR pwszSourceFullPath[MAX_LENGTH] = {0}; //each searched source full path
    WCHAR pwszDestFullPath[MAX_LENGTH] = {0};    //each dest full path according to the source path

    WCHAR pwszTempSource[MAX_LENGTH] = {0};
    WCHAR pwszTempDest[MAX_LENGTH] = {0};
    WIN32_FIND_DATA wfd;
    HANDLE hFind = NULL;

    //pwszTempSource represents the folders or files under the current source path
    wcscpy(pwszTempSource,pwszSourceDirectory);
    //pwszTempDest: concrete dest file or directory full path
    wcscpy(pwszTempDest,pwszDestDirectory);

    //Verify whether the destination directory exist
    hFind = FindFirstFile(pwszTempDest,&wfd);
    //If destination directory doesn't exist, create one.
    if(hFind == INVALID_HANDLE_VALUE)
    {
        result = ::CreateDirectory(pwszTempDest,NULL);
    }
    else if(!(wfd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY))
    {
        result = ::CreateDirectory(pwszTempDest,NULL);
    }
    //if create direcotry failed, return
    if(!result)
    {
        RETAILMSG(1, (TEXT("Create Direcotry failed: %s.\r\n"),pwszTempDest));
        FindClose(hFind);
        return result;
    }
    FindClose(hFind);
    
    //Verify source path whether is a file
    //If it's a file, copy the file to destination directory and return.
    hFind = FindFirstFile(pwszTempSource,&wfd);
    if(INVALID_HANDLE_VALUE == hFind)//source path is not a file or directory
    {
        RETAILMSG(1, (TEXT("Source Path is not corret: %s\r\n"),pwszTempSource));
        FindClose(hFind);
    }
    else if(!(wfd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY))//it's a file
    {
        StringCchPrintf(pwszDestFullPath,MAX_LENGTH,L"%s\\%s",pwszTempDest,wfd.cFileName);
        result = ::CopyFile(pwszTempSource,pwszDestFullPath,FALSE);
        if(!result)
        {
            RETAILMSG(1, (TEXT("Copy File Failed:\r\n")));
            RETAILMSG(1, (TEXT("    The Source File is: %s.\r\n"),pwszTempSource));
            RETAILMSG(1, (TEXT("    The Dest File is: %s.\r\n"),pwszTempDest));
        }
        FindClose(hFind);
        return result;
    }
    FindClose(hFind);
    //The source path is a directory, list all the sub files and directories
    wcscat(pwszTempSource,L"\\*"); 
    
    hFind = FindFirstFile(pwszTempSource,&wfd);
    if(INVALID_HANDLE_VALUE != hFind)
    {
        do
        {
            StringCchPrintf(pwszSourceFullPath,MAX_LENGTH,L"%s\\%s",pwszSourceDirectory,wfd.cFileName);
            StringCchPrintf(pwszDestFullPath,MAX_LENGTH,L"%s\\%s",pwszTempDest,wfd.cFileName);
            if(wfd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY) //Sub direcotry
            {
                if((wcscmp(wfd.cFileName,L".")!=0) && (wcscmp(wfd.cFileName,L"..")!=0))
                {
                    result = CopyToDirecotry(pwszSourceFullPath,pwszDestFullPath);
                }
            }
            else //it's a file
            {
                result = ::CopyFile(pwszSourceFullPath,pwszDestFullPath,FALSE);
                if(!result)
                {
                    RETAILMSG(1, (TEXT("Copy File Failed:\r\n")));
                    RETAILMSG(1, (TEXT("    The Source File is: %s.\r\n"),pwszSourceFullPath));
                    RETAILMSG(1, (TEXT("    The Dest File is: %s.\r\n"),pwszDestFullPath));
                }
            }
        }
        while(FindNextFile(hFind,&wfd));
    }
    else
    {
        RETAILMSG(1, (TEXT("Find First File failed in source: %s.\r\n"),pwszTempSource));
        result = FALSE; 
    }
    FindClose(hFind);
    return TRUE;

}

 

 

2. 删除文件或者目录

遍历调用方法类似，直接上Code。

//Remove file or directory
BOOL RemoveFiles(WCHAR* pwszSource)
{
    //Verify the input parameter whether is NULL
    if(NULL == pwszSource)
    {
        return FALSE;
    }
    WCHAR pwszTempDest[MAX_LENGTH] = {0};
    WCHAR pwszSourceFullPath[MAX_LENGTH]={0};
    WIN32_FIND_DATA wfd;
    HANDLE hFind = NULL;
    BOOL result = FALSE;
    //pwszTempDest = pwszSource
    wcscpy(pwszTempDest,pwszSource);

    hFind = FindFirstFile(pwszTempDest,&wfd);
    if(INVALID_HANDLE_VALUE == hFind) //source path is not a file or directory
    {
        RETAILMSG(1, (TEXT("Can't find the file or directory: %s.\r\n"),pwszTempDest));
        FindClose(hFind);
        return FALSE;
    }
    if(!(wfd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY)) //source path is a file
    {
        //invoke windows API to delete file
        result = ::DeleteFile(pwszTempDest);
        if(!result)
        {
            RETAILMSG(1, (TEXT("Delete File Failed: %s.\r\n"),pwszTempDest));
        }
        else
        {
            RETAILMSG(1, (TEXT("File delted success: %s.\r\n"),pwszTempDest));
        }
        FindClose(hFind);
        return result;
    }
    else //source path is a directory
    {
        wcscat(pwszTempDest,L"\\*"); //sub files and direcotries
        hFind = FindFirstFile(pwszTempDest,&wfd);
        if(INVALID_HANDLE_VALUE != hFind)
        {
            do
            {
                StringCchPrintf(pwszSourceFullPath,MAX_LENGTH,L"%s\\%s",pwszSource,wfd.cFileName);
                if(wfd.dwFileAttributes&FILE_ATTRIBUTE_DIRECTORY) //sub directory, recurive invoke
                {
                    if((wcscmp(wfd.cFileName,L".")!=0) && (wcscmp(wfd.cFileName,L"..")!=0))
                    {
                        result = RemoveFiles(pwszSourceFullPath);
                    }
                }
                else //it's a file, delte the file
                {
                    result = ::DeleteFile(pwszSourceFullPath);
                    if(!result)
                    {
                        RETAILMSG(1, (TEXT("Delete File Failed: %s.\r\n"),pwszSourceFullPath));
                    }
                    else
                    {
                        RETAILMSG(1, (TEXT("File delted success: %s.\r\n"),pwszSourceFullPath));
                    }
                }
            }
            while(FindNextFile(hFind,&wfd));
        }
    }
    
    FindClose(hFind);
    //remove the empty directory
    result = ::RemoveDirectory(pwszSource);
    if(!result)
    {
        RETAILMSG(1, (TEXT("Remove Direcotry failed %s.\r\n"),pwszSource));
    }
    else
    {
        RETAILMSG(1, (TEXT("Remove Direcotry Success %s.\r\n"),pwszSource));
    }
    return result;
}