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关注+2004-10-15作者:蓝点
本文介绍在NT和2000下,通过CreateFile来打开需要读写的驱动器,ReadFile、WriteFile来进行磁盘读写。
下面的代码演示了,如何读写A驱/* -----------------------------------------------------
Read Floppy Disk Sector for win NT/2000
reads [numsec] sectors from [head] [track] [sector]
-------------------------------------------------------*/
char* ReadSectors(int head, int sector, int track, int numsec){
// getting logical sector from absolute head/track/sector ...//计算扇区位置int LogicalSector = (sector-1) +
(head*SECTORSPERTRACK) +
(track*SECTORSPERTRACK*NUMOFHEADS) ;
char *buffer ; HANDLE hDevice ;
HANDLE hDevice; char* buffer = (char*)malloc (512*numsec);strset ( buffer , );DWORD bytesread ;
// getting a handle to the drive a: using // CreateFile () function ....//打开驱动器 .A:hDevice = CreateFile("\.A:",
GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
if (hDevice == NULL) {
MessageBox ("Failed !");
return NULL;}
// setting the file pointer to the start of the // sector we want to read . //移动文件指针到需要读取位置SetFilePointer (hDevice,
(LogicalSector*512),
NULL,
FILE_BEGIN);
// reading sector(s) ...//读数据if (!ReadFile ( hDevice,
buffer,
512*numsec,
&bytesread,
NULL) ){
/*
int err;
char error[10];
err=GetLastError ();
itoa (err, error, 10);
MessageBox (error, "Reading sectors ...Failed ");
return NULL ;
*/}//关闭CloseHandle(hDevice);
return buffer ;}
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