Segment copy file folder

For personal backup only

// Segment copy a single file note # define lengtheachtime 1024 // parameter 1. source File Path 2. source File Name 3. destination folder path // test: // cstring A = l "d: \ backup \ My Documents \ 11.txt"; // cstring B = l" d: \ backup \ My Documents \ 1 "; // filepartcopy (A, l" 11.txt", B); // funcvoid filepartcopy (cstring srcfilepath, cstring srcfilename, cstring desfilepath) {/* DWORD lengtheachtime = 1024; * // number of bytes copied each time desfilepath = desfilepath + _ T ("\") + srcfilename; // create the ifstream filein (srcfilepath, IOS: Binary | IOs: In) folder in the target path; // open-source ofstream fileout (desfilepath, IOS: Binary | IOs:: Out); // create the target filein. seekg (0, IOS: End); DWORD srcfilesize = (DWORD) filein. tellg (); // get the file length filein. seekg (0, IOS: Beg); // restore the file pointer to the file header if (lengtheachtime <srcfilesize) // If the multipart copy, that is, each copy content is smaller than the total length of the file {char buffer [lengtheachtime]; // cache DWORD copied = 0; // store the copied size while (copied <= (srcfilesize-lengtheachtime )) // The Difference Between the copied content and the source file size must be at least one lengtheachtime copy {filein. read (buffer, lengtheachtime); fileout. write (buffer, lengtheachtime); copied + = lengtheachtime;} DWORD leftlength = srcfilesize-copied; // copy the remaining part of filein. read (buffer, leftlength); fileout. write (buffer, leftlength);} else // overall copy, that is, the content of each copy is greater than the total length of the file {char buffer [lengtheachtime]; filein. read (buffer, srcfilesize); fileout. write (buffer, srcfilesize);} filein. close (); fileout. close ();}

 

// Segment copy folder note # define lengtheachtime 1024 // parameter 1. source folder Path 2. source folder name 3. destination folder path // funcvoid directorypartcopy (cstring srcdirectorypath, cstring srcdirectoryname, cstring desdirectorypath) {cstring dessrcdirectory = desdirectorypath + _ T ("\") + srcdirectoryname; // create the source folder createdirectory (dessrcdirectory, null); bool ifexist = false; cfilefind finder; ifexist = finder. findfile (srcdirectorypath + _ T ("\\*. * "); If (! Ifexist) {return;} while (ifexist) {ifexist = finder. findnextfile (); If (finder. isdots () // if it is ". "(current directory) or ".. "(parent directory) {continue;} cstring tempsrcdirectorypath = finder. getfilepath (); cstring tempsrcdirectoryname = finder. getfilename (); If (finder. isdirectory () {directorypartcopy (tempsrcdirectorypath, tempsrcdirectoryname, dessrcdirectory);} else {cstring dessrcfile = dessrcdirectory + _ T ("\") + tempsrcdirectoryname; // create the file ifstream filein (tempsrcdirectorypath, IOS: Binary | IOs: In) at the destination path; // open-source ofstream fileout (dessrcfile, IOS: Binary | IOs:: Out); // create the target filein. seekg (0, IOS: End); DWORD srcfilesize = (DWORD) filein. tellg (); If (lengtheachtime <srcfilesize) // If multipart copy is performed, the content of each copy is smaller than the total file length {char buffer [lengtheachtime]; DWORD copied = 0; while (copied <= (srcfilesize-lengtheachtime) // copy the subject part {filein. read (buffer, lengtheachtime); fileout. write (buffer, lengtheachtime); copied + = lengtheachtime;} DWORD leftlength = srcfilesize-copied; // copy the remaining part of filein. read (buffer, leftlength); fileout. write (buffer, leftlength);} else // if the overall copy is performed, the content of each copy is greater than the total length of the file {char buffer [lengtheachtime]; filein. read (buffer, srcfilesize); fileout. write (buffer, srcfilesize);} filein. close (); fileout. close ();}}}

 

// Optimize void directorypartcopy (cstring srcdirectorypath, cstring srcdirectoryname, cstring desdirectorypath) {cstring dessrcdirectory = desdirectorypath + _ T ("\") + srcdirectoryname; // create the source folder createdirectory (dessrcdirectory, null); bool ifexist = false; cfilefind finder; ifexist = finder. findfile (srcdirectorypath + _ T ("\\*. * "); If (! Ifexist) {return;} while (ifexist) {ifexist = finder. findnextfile (); If (finder. isdots () // if it is ". "(current directory) or ".. "(parent directory) {continue;} cstring tempsrcdirectorypath = finder. getfilepath (); cstring tempsrcdirectoryname = finder. getfilename (); If (finder. isdirectory () {directorypartcopy (tempsrcdirectorypath, tempsrcdirectoryname, dessrcdirectory);} else {filepartcopy (tempsrcdirectorypath, tempsrcdirectoryname, dessrcdirectory );}}}