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Commit 181a7cca authored by Jukka Heinonen's avatar Jukka Heinonen Committed by Alexandre Julliard
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Moved drive parameter block (DPB) routines to winedos.

parent f227cfaa
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msdos/int21.c
View file @ 181a7cca
......@@ -73,62 +73,9 @@ WINE_DEFAULT_DEBUG_CHANNEL(int21);
#define DOS_GET_DRIVE(reg) ((reg) ? (reg) - 1 : DRIVE_GetCurrentDrive())
/* Define the drive parameter block, as used by int21/1F
* and int21/32. This table can be accessed through the
* global 'dpb' pointer, which points into the local dos
* heap.
*/
struct DPB
{
BYTE drive_num; /* 0=A, etc. */
BYTE unit_num; /* Drive's unit number (?) */
WORD sector_size; /* Sector size in bytes */
BYTE high_sector; /* Highest sector in a cluster */
BYTE shift; /* Shift count (?) */
WORD reserved; /* Number of reserved sectors at start */
BYTE num_FAT; /* Number of FATs */
WORD dir_entries; /* Number of root dir entries */
WORD first_data; /* First data sector */
WORD high_cluster; /* Highest cluster number */
WORD sectors_in_FAT; /* Number of sectors per FAT */
WORD start_dir; /* Starting sector of first dir */
DWORD driver_head; /* Address of device driver header (?) */
BYTE media_ID; /* Media ID */
BYTE access_flag; /* Prev. accessed flag (0=yes,0xFF=no) */
DWORD next; /* Pointer to next DPB in list */
WORD free_search; /* Free cluster search start */
WORD free_clusters; /* Number of free clusters (0xFFFF=unknown) */
};
struct EDPB /* FAT32 extended Drive Parameter Block */
{ /* from Ralf Brown's Interrupt List */
struct DPB dpb; /* first 24 bytes = original DPB */
BYTE edpb_flags; /* undocumented/unknown flags */
DWORD next_edpb; /* pointer to next EDPB */
WORD free_cluster; /* cluster to start search for free space on write, typically
the last cluster allocated */
WORD clusters_free; /* number of free clusters on drive or FFFF = unknown */
WORD clusters_free_hi; /* hiword of clusters_free */
WORD mirroring_flags; /* mirroring flags: bit 7 set = do not mirror active FAT */
/* bits 0-3 = 0-based number of the active FAT */
WORD info_sector; /* sector number of file system info sector, or FFFF for none */
WORD spare_boot_sector; /* sector number of backup boot sector, or FFFF for none */
DWORD first_cluster; /* sector number of the first cluster */
DWORD max_cluster; /* sector number of the last cluster */
DWORD fat_clusters; /* number of clusters occupied by FAT */
DWORD root_cluster; /* cluster number of start of root directory */
DWORD free_cluster2; /* same as free_cluster: cluster at which to start
search for free space when writing */
};
DWORD dpbsegptr;
struct DosHeap {
BYTE mediaID;
BYTE biosdate[8];
struct DPB dpb;
};
static struct DosHeap *heap;
static WORD DosHeapHandle;
......@@ -143,7 +90,6 @@ static BOOL INT21_CreateHeap(void)
return FALSE;
}
heap = (struct DosHeap *) GlobalLock16(DosHeapHandle);
dpbsegptr = MAKESEGPTR(DosHeapHandle,(int)&heap->dpb-(int)heap);
strcpy(heap->biosdate, "01/01/80");
return TRUE;
}
......@@ -223,60 +169,6 @@ static int INT21_GetDriveAllocInfo( CONTEXT86 *context )
return 1;
}
static int FillInDrivePB( int drive )
{
if(!DRIVE_IsValid(drive))
{
SetLastError( ERROR_INVALID_DRIVE );
return 0;
}
else if (heap || INT21_CreateHeap())
{
/* FIXME: I have no idea what a lot of this information should
* say or whether it even really matters since we're not allowing
* direct block access. However, some programs seem to depend on
* getting at least _something_ back from here. The 'next' pointer
* does worry me, though. Should we have a complete table of
* separate DPBs per drive? Probably, but I'm lazy. :-) -CH
*/
heap->dpb.drive_num = heap->dpb.unit_num = drive; /*The same?*/
heap->dpb.sector_size = 512;
heap->dpb.high_sector = 1;
heap->dpb.shift = drive < 2 ? 0 : 6; /*6 for HD, 0 for floppy*/
heap->dpb.reserved = 0;
heap->dpb.num_FAT = 1;
heap->dpb.dir_entries = 2;
heap->dpb.first_data = 2;
heap->dpb.high_cluster = 64000;
heap->dpb.sectors_in_FAT = 1;
heap->dpb.start_dir = 1;
heap->dpb.driver_head = 0;
heap->dpb.media_ID = (drive > 1) ? 0xF8 : 0xF0;
heap->dpb.access_flag = 0;
heap->dpb.next = 0;
heap->dpb.free_search = 0;
heap->dpb.free_clusters = 0xFFFF; /* unknown */
return 1;
}
return 0;
}
static void GetDrivePB( CONTEXT86 *context, int drive )
{
if (FillInDrivePB( drive ))
{
SET_AL( context, 0x00 );
context->SegDs = SELECTOROF(dpbsegptr);
SET_BX( context, OFFSETOF(dpbsegptr) );
}
else
{
SET_AX( context, 0x00ff );
}
}
static BOOL ioctlGenericBlkDevReq( CONTEXT86 *context )
{
BYTE *dataptr = CTX_SEG_OFF_TO_LIN(context, context->SegDs, context->Edx);
......@@ -722,20 +614,10 @@ void WINAPI INT_Int21Handler( CONTEXT86 *context )
if (!INT21_GetDriveAllocInfo(context)) SET_AX( context, 0xffff );
break;
case 0x1f: /* GET DRIVE PARAMETER BLOCK FOR DEFAULT DRIVE */
GetDrivePB(context, DRIVE_GetCurrentDrive());
break;
case 0x29: /* PARSE FILENAME INTO FCB */
INT21_ParseFileNameIntoFCB(context);
break;
case 0x32: /* GET DOS DRIVE PARAMETER BLOCK FOR SPECIFIC DRIVE */
TRACE("GET DOS DRIVE PARAMETER BLOCK FOR DRIVE %s\n",
INT21_DriveName( DL_reg(context)));
GetDrivePB(context, DOS_GET_DRIVE( DL_reg(context) ) );
break;
case 0x36: /* GET FREE DISK SPACE */
TRACE("GET FREE DISK SPACE FOR DRIVE %s\n",
INT21_DriveName( DL_reg(context)));
......@@ -941,86 +823,6 @@ void WINAPI INT_Int21Handler( CONTEXT86 *context )
}
break;
case 0x73: /* MULTIPLEXED: Win95 OSR2/Win98 FAT32 calls */
TRACE("windows95 function AX %04x\n",
AX_reg(context));
switch (AL_reg(context))
{
case 0x02: /* Get Extended Drive Parameter Block for specific drive */
/* ES:DI points to word with length of data (should be 0x3d) */
{
WORD *buffer;
struct EDPB *edpb;
DWORD cluster_sectors, sector_bytes, free_clusters, total_clusters;
char root[] = "A:\\";
buffer = (WORD *)CTX_SEG_OFF_TO_LIN(context, context->SegEs, context->Edi);
TRACE("Get Extended DPB: linear buffer address is %p\n", buffer);
/* validate passed-in buffer lengths */
if ((*buffer != 0x3d) || (context->Ecx != 0x3f))
{
WARN("Get Extended DPB: buffer lengths incorrect\n");
WARN("CX = %lx, buffer[0] = %x\n", context->Ecx, *buffer);
SET_CFLAG(context);
SET_AL( context, 0x18 ); /* bad buffer length */
}
/* buffer checks out */
buffer++; /* skip over length word now */
if (FillInDrivePB( DX_reg(context) ) )
{
edpb = (struct EDPB *)buffer;
/* copy down the old-style DPB portion first */
memcpy(&edpb->dpb, &heap->dpb, sizeof(struct DPB));
/* now fill in the extended entries */
edpb->edpb_flags = 0;
edpb->next_edpb = 0;
edpb->free_cluster = edpb->free_cluster2 = 0;
/* determine free disk space */
*root += DOS_GET_DRIVE( DX_reg(context) );
GetDiskFreeSpaceA( root, &cluster_sectors, &sector_bytes,
&free_clusters, &total_clusters );
edpb->clusters_free = (free_clusters&0xffff);
edpb->clusters_free_hi = free_clusters >> 16;
edpb->mirroring_flags = 0;
edpb->info_sector = 0xffff;
edpb->spare_boot_sector = 0xffff;
edpb->first_cluster = 0;
edpb->max_cluster = total_clusters;
edpb->fat_clusters = 32; /* made-up value */
edpb->root_cluster = 0;
RESET_CFLAG(context); /* clear carry */
SET_AX( context, 0 );
}
else
{
SET_AX( context, 0x00ff );
SET_CFLAG(context);
}
}
break;
case 0x03: /* Get Extended free space on drive */
case 0x04: /* Set DPB for formatting */
case 0x05: /* extended absolute disk read/write */
FIXME("Unimplemented FAT32 int32 function %04x\n", AX_reg(context));
SET_CFLAG(context);
SET_AL( context, 0 );
break;
}
break;
default:
INT_BARF( context, 0x21 );
break;
......
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