[VC] large file splitting tool, supporting a maximum size of 3 GB

Pnig0s p.s. In fact, the main thing is to practice the memory ing file method. The Demo is a bit rough, and I used it to separate the SQL file myself.

The usage is clearly written in-h, and the size is calculated in KB. Pay attention to this when using it.

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# Include <stdio. h>
  
  
# Include <iostream>
  
  
# Include <Windows. h>
  
  
# Include <time. h>
  
  
# Include "head. h"
  
  
Using namespace std;
  
  
Int main (int argc, char * argv []) {
  
  
HANDLE hInFile = INVALID_HANDLE_VALUE; // remain
  
  
HANDLE hInMap;
  
  
FILEINFO fi;
  
  
BOOL bHelp = FALSE;
  
  
DWORD dwPartSize;
  
  
For (int I = 0; I <argc; I ++ ){
  
  
If (argc = 1 ){
  
  
BHelp = TRUE;
  
  
}
  
  
LPSTR lpChkCmd = argv [I];
  
  
LPSTR lpValue = argv [I + 1];
  
  
If (lstrcmp (lpChkCmd, "-f") = 0 ){
  
  
Fi. lpFileName = lpValue;
  
  
} Else if (lstrcmp (lpChkCmd, "-s") = 0 ){
  
  
DwPartSize = atol (lpValue) * 1024;
  
  
} Else if (lstrcmp (lpChkCmd, "-h") = 0 ){
  
  
BHelp = TRUE;
  
  
}
  
  
}
  
  
If (bHelp ){
  
  
Printf ("\ n --------------------------------");
  
  
Printf ("\ n | \ tLarge file dividing \ t | ");
  
  
Printf ("\ n | \ t \ tby: Pnig0s1992 \ t | ");
  
  
Printf ("\ n | \ t \ t2011, 11,25 \ t | ");
  
  
Printf ("\ n --------------------------------");
  
  
Printf ("\ nUsage: \ n"
  
  
& Quot; % s-f div.txt-s 1024 \ n & quot"
  
  
"Options: \ n"
  
  
"-F Specify the file u want to divide. \ n"
  
  
"-S Specify the size for each part (KB). \ n"
  
  
"-H Display the usage. \ n", argv [0]);
  
  
Exit (1 );
  
  
}
  
  
HInFile = CreateFile (fi. lpFileName, GENERIC_READ | GENERIC_WRITE, file_pai_read | file_write _write, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL );
  
  
If (hInFile = INVALID_HANDLE_VALUE ){
  
  
Printf ("\ n failed to open the file (% d).", GetLastError ());
  
  
Return 0;
  
  
}
  
  
Fi. dwFileLowSize = GetFileSize (hInFile, & fi. dwFileHighSize );
  
  
Fi. dwFileSize = fi. dwFileLowSize;
  
  
HInMap = CreateFileMapping (hInFile, NULL, PAGE_READWRITE, 0, 0, NULL );
  
  
If (hInMap = NULL ){
  
  
Printf ("\ n failed to create source file ing (% d).", GetLastError ());
  
  
CloseHandle (hInFile );
  
  
Return 0;
  
  
}
  
  
Fi. dwPartNum = fi. dwFileSize/dwPartSize;
  
  
If (fi. dwFileSize % dwPartSize )! = 0 ){
  
  
Fi. dwPartNum + = 1;
  
  
}
  
  
Printf ("\ n file size: % uKB \ t number of parts: % u \ n", fi. dwFileSize/1024, fi. dwPartNum );
  
  
DWORD dwCurAddr = 0;
  
  
DWORD dwCurSize = 0;
  
  
System ("pause ");
  
  
DWORD dwBegin, dwFinish;
  
  
DwBegin = GetTickCount ();
  
  
For (int index = 0; index <fi. dwPartNum; index ++ ){
  
  
DwCurSize = fi. dwFileSize-dwCurAddr;
  
  
If (dwCurSize> dwPartSize ){
  
  
DwCurSize = dwPartSize;
  
  
}
  
  
LPVOID lpInMapContext;
  
  
LpInMapContext = MapViewOfFile (hInMap, FILE_MAP_READ | FILE_MAP_WRITE, 0, dwCurAddr, dwCurSize );
  
  
If (! LpInMapContext ){
  
  
Printf ("\ n failed to create the source file view. (% d)", GetLastError ());
  
  
CloseHandle (hInFile );
  
  
Return 0;
  
  
}
  
  
DwCurAddr + = dwCurSize;
  
  
Char cIndex [4];
  
  
Itoa (index + 1, cIndex, 10 );
  
  
HANDLE hOutFile;
  
  
HOutFile = CreateFile (cIndex, GENERIC_ALL, file_pai_read | file_pai_write, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL );
  
  
If (hOutFile = INVALID_HANDLE_VALUE ){
  
  
Printf ("\ n failed to create the target file (% d).", GetLastError ());
  
  
Return 0;
  
  
}
  
  
HANDLE hOutMap;
  
  
HOutMap = CreateFileMapping (hOutFile, NULL, PAGE_READWRITE, 0, dwCurSize, NULL );
  
  
If (hOutMap = NULL ){
  
  
Printf ("\ n failed to create the target file ing (% d).", GetLastError ());
  
  
Return 0;
  
  
}
  
  
LPVOID lpOutMapContext;
  
  
LpOutMapContext = MapViewOfFile (hOutMap, FILE_MAP_WRITE, 0, 0 );
  
  
If (hOutMap = NULL ){
  
  
Printf ("\ n failed to create the target file view. (% d)", GetLastError ());
  
  
Return 0;
  
  
}
  
  
CopyMemory (lpOutMapContext, lpInMapContext, dwCurSize );
  
  
Printf ("\ n [MSG] block % d completed.", index + 1 );
  
  
UnmapViewOfFile (lpInMapContext );
  
  
UnmapViewOfFile (lpOutMapContext );
  
  
CloseHandle (hOutMap );
  
  
CloseHandle (hOutFile );
  
  
}
  
  
CloseHandle (hInMap );
  
  
CloseHandle (hInFile );
  
  
DwFinish = GetTickCount ();
  
  
DWORD dwRunTime = dwFinish-dwBegin;
  
  
Printf ("\ n time: % u millisecond", dwRunTime );
  
  
Return 1;
  
  
}
 
 

 

This article is from the "About: Blank H4cking" blog, please be sure to keep this source http://pnig0s1992.blog.51cto.com/393390/724509