110 lines
2.5 KiB
HolyC
110 lines
2.5 KiB
HolyC
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#define ZERO_BUF_SIZE 2048
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U0 BlkWriteZero(CDrv *dv,I64 blk,I64 cnt)
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{//Fill blk cnt with zeros in Drv.
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I64 n;
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U8 *z=CAlloc(ZERO_BUF_SIZE<<BLK_SIZE_BITS);
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Bool show_progress;
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if (cnt>ZERO_BUF_SIZE && dv->bd->type!=BDT_RAM) {
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progress1=0; progress1_max=cnt;
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StrCpy(progress1_desc,"Zeroing");
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show_progress=TRUE;
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} else
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show_progress=FALSE;
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while (cnt>0) {
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n=cnt;
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if (n>ZERO_BUF_SIZE)
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n=ZERO_BUF_SIZE;
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BlkWrite(dv,z,blk,n);
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blk+=n;
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cnt-=n;
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if (show_progress)
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progress1+=n;
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Yield; //Prevent locking
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}
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Free(z);
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if (show_progress) {
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*progress1_desc=0;
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progress1=progress1_max=0;
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}
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}
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Bool BlkRead(CDrv *dv,U8 *buf, I64 blk, I64 cnt)
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{//Read blk cnt from Drv to buf.
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Bool res=TRUE,unlock;
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CBlkDev *bd=dv->bd;
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if (cnt<=0) return TRUE;
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DrvChk(dv);
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try {
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unlock=DrvLock(dv);
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BlkDevInit(bd);
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if (dv->drv_offset && blk<dv->drv_offset ||
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blk+cnt>dv->drv_offset+dv->size)
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throw('Drv');
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if (bd->flags & BDF_READ_CACHE)
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RCache(dv,&buf,&blk,&cnt);
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if (cnt>0) {
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switch (bd->type) {
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case BDT_RAM:
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MemCpy(buf,bd->RAM_dsk+blk<<BLK_SIZE_BITS,cnt<<BLK_SIZE_BITS);
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break;
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case BDT_ISO_FILE_READ:
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case BDT_ISO_FILE_WRITE:
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FBlkRead(bd->file_dsk,buf,blk,cnt);
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break;
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case BDT_ATA:
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case BDT_ATAPI:
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res=ATARBlks(dv,buf,blk,cnt);
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break;
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}
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bd->last_time=tS;
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if (bd->flags & BDF_READ_CACHE)
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DskCacheAdd(dv,buf,blk,cnt);
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}
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if (unlock)
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DrvUnlock(dv);
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} catch
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if (unlock)
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DrvUnlock(dv);
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return res;
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}
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Bool BlkWrite(CDrv *dv,U8 *buf, I64 blk, I64 cnt)
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{//Write blk cnt from buf to Drv.
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Bool res=TRUE,unlock;
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CBlkDev *bd=dv->bd;
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if (cnt<=0) return TRUE;
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DrvChk(dv);
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try {
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unlock=DrvLock(dv);
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BlkDevInit(bd);
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if (bd->flags&BDF_READ_ONLY && !(bd->flags & BDF_READ_ONLY_OVERRIDE))
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throw('BlkDev');
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if (dv->drv_offset && blk<dv->drv_offset ||
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blk+cnt>dv->drv_offset+dv->size)
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throw('Drv');
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if (cnt>0) {
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switch (bd->type) {
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case BDT_RAM:
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MemCpy(bd->RAM_dsk+blk<<BLK_SIZE_BITS,buf,cnt<<BLK_SIZE_BITS);
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break;
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case BDT_ISO_FILE_READ:
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case BDT_ISO_FILE_WRITE:
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FBlkWrite(bd->file_dsk,buf,blk,cnt);
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break;
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case BDT_ATA:
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case BDT_ATAPI:
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res=ATAWBlks(dv,buf,blk,cnt);
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break;
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}
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bd->last_time=tS;
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if (bd->flags & BDF_READ_CACHE)
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DskCacheAdd(dv,buf,blk,cnt);
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}
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if (unlock)
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DrvUnlock(dv);
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} catch
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if (unlock)
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DrvUnlock(dv);
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return res;
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}
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