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/*
*
* Copyright (c) 1995 FirePower Systems, Inc.
*
* $RCSfile: vrdisp.c $
* $Revision: 1.7 $
* $Date: 1996/04/15 02:56:02 $
* $Locker: $
*
*
*
* Module Name:
* vrdisp.c
*
* Author:
* Shin Iwamoto at FirePower Systems Inc.
*
* History:
* 16-Jun-94 Shin Iwamoto at FirePower Systems Inc.
* Returned always EINVAL in VrTestUnicodeCharacter().
* 18-May-94 Shin Iwamoto at FirePower Systems Inc.
* Added for DispalDevice flag.
* Added some comments.
* 05-May-94 Shin Iwamoto at FirePower Systems Inc.
* Created roughly.
*
*/
#include "veneer.h"
//
// Static data.
//
STATIC ARC_DISPLAY_STATUS DisplayStatus = {
//
// Assume bold, (1), white, (7), foreground and blue, (4)
// background because the only known programs that use the
// "get current colors" feature is arcinst which uses white
// on blue. Anyway, every other Microsoft ARC client we have
// seen uses the same color scheme.
//
0, 0, 80, 32, 7, 4, 1, 0, 0
};
/*
* Name: VrGetDisplayStatus
*
* Description:
* This function returns a pointer to a display status structure.
*
* Arguments:
* FileId - Supplies the file table index.
*
* Return Value:
* If the device associated with FileId is not a display device
* or is not a valid file descriptor, then return a null pointer.
* Otherwise, returns the display status structure.
*
*/
PARC_DISPLAY_STATUS
VrGetDisplayStatus(
IN ULONG FileId
)
{
PARC_DISPLAY_STATUS PDisplayStatus = &DisplayStatus;
phandle ph;
int lines;
if (FileId == 1) { // stdout
ph = OFFinddevice("/chosen");
lines = get_int_prop(ph, "stdout-#lines");
if (lines != -1) {
PDisplayStatus->CursorMaxYPosition = lines;
}
return PDisplayStatus;
}
if (FileId >= FILE_TABLE_SIZE) {
return (PARC_DISPLAY_STATUS)NULL;
}
if (!(FileTable[FileId].Flags.Open == 1
&& FileTable[FileId].Flags.Write == 1)) {
return (PARC_DISPLAY_STATUS)NULL;
}
if (FileTable[FileId].Flags.DisplayDevice != 1) {
return (PARC_DISPLAY_STATUS)NULL;
}
ph = OFInstanceToPackage(FileTable[FileId].IHandle);
lines = get_int_prop(ph, "stdout-#lines");
if (lines != -1) {
PDisplayStatus->CursorMaxYPosition = lines;
}
return PDisplayStatus;
}
/*
* Name: VrTestUnicodeCharacter
*
* Description:
* This function tests whether or not the display driver associated
* with FileId is capable of rendering the Unicode character.
*
* Arguments:
* FileId - Supplies the file table index.
* UnicodeCharacter - Supplies the character to be tested.
*
* Return Value:
*
*/
ARC_STATUS
VrTestUnicodeCharacter(
IN ULONG FileId,
IN WCHAR UnicodeCharacter
)
{
if (FileId >= FILE_TABLE_SIZE) {
return EBADF;
}
if (!((FileTable[FileId].Flags.Open == 1) &&
(FileTable[FileId].Flags.Write == 1))) {
return EBADF;
}
if (FileTable[FileId].Flags.DisplayDevice != 1) {
return EBADF;
}
//
// Open Firmware has not capability to render any Unicode character.
// But it supports 8-bit through. (Mr. Tooch said. '94.06.15)
//
return EINVAL;
}
/*
* Name: VrDisplayInitialize
*
* Description:
* This function initializes the Dispaly entry points in the firmware
* transfer vector.
*
* Arguments:
* None.
*
* Return Value:
* None.
*
*/
VOID
VrDisplayInitialize(
VOID
)
{
debug(VRDBG_ENTRY, "VrDisplayInitialize BEGIN.....\n");
//
// Initialize the Display entry points in the firmware transfer vector.
//
(PARC_GET_DISPLAY_STATUS_ROUTINE)
SYSTEM_BLOCK->FirmwareVector[GetDisplayStatusRoutine] =
VrGetDisplayStatus;
debug(VRDBG_ENTRY, "VrDisplayInitialize .....END\n");
}
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