winedos / Cleanup int21 fcb code
Jukka Heinonen
jhei at iki.fi
Sun May 18 05:32:35 CDT 2003
This patch adds some helper routines for drive handling,
makes FCB code use those helpers and fixes some naming
issues in FCB code.
FCB code works just like it did before this patch. Even
case where current drive number cannot be determined works
in the same way because illegal drive numbers will be caught
when file is opened. I just don't want each function which needs
drive number mapping use its own current drive routine because
there will be quite a few of those.
Changelog:
Move get current drive int21 function to winedos.
Fix spelling mistakes.
Add some drive handling helper routines.
Index: msdos/int21.c
===================================================================
RCS file: /home/wine/wine/msdos/int21.c,v
retrieving revision 1.92
diff -u -r1.92 int21.c
--- msdos/int21.c 21 Apr 2003 23:22:53 -0000 1.92
+++ msdos/int21.c 18 May 2003 10:11:19 -0000
@@ -931,10 +931,6 @@
SET_AL( context, INT21_FindNextFCB(context) ? 0x00 : 0xff );
break;
- case 0x19: /* GET CURRENT DEFAULT DRIVE */
- SET_AL( context, DRIVE_GetCurrentDrive() );
- break;
-
case 0x1b: /* GET ALLOCATION INFORMATION FOR DEFAULT DRIVE */
SET_DL( context, 0 );
if (!INT21_GetDriveAllocInfo(context)) SET_AX( context, 0xffff );
Index: dlls/winedos/int21.c
===================================================================
RCS file: /home/wine/wine/dlls/winedos/int21.c,v
retrieving revision 1.33
diff -u -r1.33 int21.c
--- dlls/winedos/int21.c 15 May 2003 22:54:43 -0000 1.33
+++ dlls/winedos/int21.c 18 May 2003 10:11:31 -0000
@@ -86,8 +86,6 @@
BYTE misc_indos; /* Interrupt 21 nesting flag */
} INT21_HEAP;
-#include "poppack.h"
-
struct FCB {
BYTE drive_number;
@@ -116,6 +114,44 @@
BYTE fcb[37];
};
+#include "poppack.h"
+
+
+/***********************************************************************
+ * INT21_GetCurrentDrive
+ *
+ * Return current drive using scheme (0=A:, 1=B:, 2=C:, ...) or
+ * MAX_DOS_DRIVES on error.
+ */
+static BYTE INT21_GetCurrentDrive()
+{
+ WCHAR current_directory[MAX_PATH];
+
+ if (!GetCurrentDirectoryW( MAX_PATH, current_directory ) ||
+ current_directory[1] != ':')
+ {
+ TRACE( "Failed to get current drive.\n" );
+ return MAX_DOS_DRIVES;
+ }
+
+ return toupperW( current_directory[0] ) - 'A';
+}
+
+
+/***********************************************************************
+ * INT21_MapDrive
+ *
+ * Convert drive number from scheme (0=default, 1=A:, 2=B:, ...) into
+ * scheme (0=A:, 1=B:, 2=C:, ...) or MAX_DOS_DRIVES on error.
+ */
+static BYTE INT21_MapDrive( BYTE drive )
+{
+ if (drive)
+ return drive - 1;
+
+ return INT21_GetCurrentDrive();
+}
+
/***********************************************************************
* INT21_ReadChar
@@ -376,7 +412,10 @@
}
-static BYTE *GetCurrentDTA( CONTEXT86 *context )
+/***********************************************************************
+ * INT21_GetCurrentDTA
+ */
+static BYTE *INT21_GetCurrentDTA( CONTEXT86 *context )
{
TDB *pTask = GlobalLock16(GetCurrentTask());
@@ -407,7 +446,6 @@
{
struct FCB *fcb;
struct XFCB *xfcb;
- char current_directory[MAX_PATH];
char file_path[16];
char *pos;
HANDLE handle;
@@ -422,16 +460,7 @@
} /* if */
AL_result = 0;
- if (fcb->drive_number == 0) {
- if (!GetCurrentDirectoryA(sizeof(current_directory), current_directory) ||
- current_directory[1] != ':') {
- TRACE("GetCurrentDirectoryA failed\n");
- AL_result = 0xff; /* failed */
- } /* if */
- file_path[0] = toupper(current_directory[0]);
- } else {
- file_path[0] = 'A' + fcb->drive_number - 1;
- } /* if */
+ file_path[0] = 'A' + INT21_MapDrive( fcb->drive_number );
if (AL_result == 0) {
file_path[1] = ':';
@@ -525,7 +554,7 @@
} /* if */
if (_lclose16((HFILE16) fcb->file_number) != 0) {
- TRACE("_llclose16(%d) failed\n", fcb->file_number);
+ TRACE("_lclose16(%d) failed\n", fcb->file_number);
AL_result = 0xff; /* failed */
} else {
TRACE("successful closed file %d\n", fcb->file_number);
@@ -536,7 +565,7 @@
/***********************************************************************
- * INT21_SequenialReadFromFCB
+ * INT21_SequentialReadFromFCB
*
* Handler for function 0x14.
*
@@ -557,7 +586,7 @@
* are updated to point to the next record. If a partial record is
* read, it is filled with zeros up to the FCB->logical_record_size.
*/
-static void INT21_SequenialReadFromFCB( CONTEXT86 *context )
+static void INT21_SequentialReadFromFCB( CONTEXT86 *context )
{
struct FCB *fcb;
struct XFCB *xfcb;
@@ -587,7 +616,7 @@
fcb->file_number, record_number * fcb->logical_record_size, position);
AL_result = 0x01; /* end of file, no data read */
} else {
- disk_transfer_area = GetCurrentDTA(context);
+ disk_transfer_area = INT21_GetCurrentDTA(context);
bytes_read = _lread((HFILE) handle, disk_transfer_area, fcb->logical_record_size);
if (bytes_read != fcb->logical_record_size) {
TRACE("_lread(%d, %p, %d) failed with %d\n",
@@ -618,7 +647,7 @@
/***********************************************************************
- * INT21_SequenialWriteToFCB
+ * INT21_SequentialWriteToFCB
*
* Handler for function 0x15.
*
@@ -637,7 +666,7 @@
* Then FCB->current_block_number and FCB->record_within_current_block
* are updated to point to the next record.
*/
-static void INT21_SequenialWriteToFCB( CONTEXT86 *context )
+static void INT21_SequentialWriteToFCB( CONTEXT86 *context )
{
struct FCB *fcb;
struct XFCB *xfcb;
@@ -667,7 +696,7 @@
fcb->file_number, record_number * fcb->logical_record_size, position);
AL_result = 0x01; /* disk full */
} else {
- disk_transfer_area = GetCurrentDTA(context);
+ disk_transfer_area = INT21_GetCurrentDTA(context);
bytes_written = _lwrite((HFILE) handle, disk_transfer_area, fcb->logical_record_size);
if (bytes_written != fcb->logical_record_size) {
TRACE("_lwrite(%d, %p, %d) failed with %d\n",
@@ -743,7 +772,7 @@
fcb->file_number, record_number * fcb->logical_record_size, position);
AL_result = 0x01; /* end of file, no data read */
} else {
- disk_transfer_area = GetCurrentDTA(context);
+ disk_transfer_area = INT21_GetCurrentDTA(context);
bytes_read = _lread((HFILE) handle, disk_transfer_area, fcb->logical_record_size);
if (bytes_read != fcb->logical_record_size) {
TRACE("_lread(%d, %p, %d) failed with %d\n",
@@ -816,7 +845,7 @@
fcb->file_number, record_number * fcb->logical_record_size, position);
AL_result = 0x01; /* disk full */
} else {
- disk_transfer_area = GetCurrentDTA(context);
+ disk_transfer_area = INT21_GetCurrentDTA(context);
bytes_written = _lwrite((HFILE) handle, disk_transfer_area, fcb->logical_record_size);
if (bytes_written != fcb->logical_record_size) {
TRACE("_lwrite(%d, %p, %d) failed with %d\n",
@@ -896,7 +925,7 @@
records_read = 0;
AL_result = 0x01; /* end of file, no data read */
} else {
- disk_transfer_area = GetCurrentDTA(context);
+ disk_transfer_area = INT21_GetCurrentDTA(context);
records_requested = CX_reg(context);
bytes_requested = (UINT) records_requested * fcb->logical_record_size;
bytes_read = _lread((HFILE) handle, disk_transfer_area, bytes_requested);
@@ -987,7 +1016,7 @@
records_written = 0;
AL_result = 0x01; /* disk full */
} else {
- disk_transfer_area = GetCurrentDTA(context);
+ disk_transfer_area = INT21_GetCurrentDTA(context);
records_requested = CX_reg(context);
bytes_requested = (UINT) records_requested * fcb->logical_record_size;
bytes_written = _lwrite((HFILE) handle, disk_transfer_area, bytes_requested);
@@ -2144,11 +2173,11 @@
break;
case 0x14: /* SEQUENTIAL READ FROM FCB FILE */
- INT21_SequenialReadFromFCB( context );
+ INT21_SequentialReadFromFCB( context );
break;
case 0x15: /* SEQUENTIAL WRITE TO FCB FILE */
- INT21_SequenialWriteToFCB( context );
+ INT21_SequentialWriteToFCB( context );
break;
case 0x16: /* CREATE OR TRUNCATE FILE USING FCB */
@@ -2161,7 +2190,8 @@
break;
case 0x19: /* GET CURRENT DEFAULT DRIVE */
- INT_Int21Handler( context );
+ SET_AL( context, INT21_GetCurrentDrive() );
+ TRACE( "GET CURRENT DRIVE -> %c:\n", 'A' + AL_reg( context ) );
break;
case 0x1a: /* SET DISK TRANSFER AREA ADDRESS */
--
Jukka Heinonen <http://www.iki.fi/jhei/>
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