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putkey.asm
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Assembly Source File
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1991-08-15
|
11KB
|
233 lines
; File......: PUTKEY.ASM
; Author....: Ted Means
; Date......: $Date: 15 Aug 1991 23:07:10 $
; Revision..: $Revision: 1.2 $
; Log file..: $Logfile: E:/nanfor/src/putkey.asv $
;
; This is an original work by Ted Means and is placed in the
; public domain.
;
; Modification history:
; ---------------------
;
; $Log: E:/nanfor/src/putkey.asv $
;
; Rev 1.2 15 Aug 1991 23:07:10 GLENN
; Forest Belt proofread/edited/cleaned up doc
;
; Rev 1.1 14 Jun 1991 19:54:56 GLENN
; Minor edit to file header
;
; Rev 1.0 01 Apr 1991 01:03:48 GLENN
; Nanforum Toolkit
;
; $DOC$
; $FUNCNAME$
; FT_PUTKEY()
; $CATEGORY$
; Keyboard/Mouse
; $ONELINER$
; Stuff a keystroke into the keyboard buffer
; $SYNTAX$
; FT_PUTKEY( <nKeyValue> ) -> lResult
; $ARGUMENTS$
; <nKeyValue> is the INKEY() value of the keystroke to be stuffed.
; $RETURNS$
; .T. if the keystroke was put into the keyboard buffer.
; .F. if nKeyValue was invalid or the buffer was full.
; $DESCRIPTION$
; This function is similar to the KEYBOARD command, with a few
; exceptions. First, this function does not clear the keyboard buffer
; before inserting the keystroke. In addition, since it uses the
; Inkey() value, you can stuff any key, including function keys, into
; the keyboard buffer. However, this also means that unlike the KEYBOARD
; command, you can only stuff one keystroke at a time.
;
; You can easily create a User-Defined Command that makes this function
; even more like the KEYBOARD command. For example,
;
; #command KEYSTROKE <key> => FT_PUTKEY( <key> )
;
; will create a command called KEYSTROKE that could be used as a
; companion command to KEYBOARD. The only difference is that it would
; insert a single keystroke instead of a string.
;
; Be aware that early releases of Clipper 5.0 have a bug in their
; keyboard handling. Among other things, Set Typeahead does not work
; correctly, so this function may at times return .T. even though the
; keyboard buffer is full. The best solution is not to attempt stuffing
; more than 15 keys at a time into the keyboard buffer.
;
; This function is written to adhere to Turbo Assembler's IDEAL mode.
; To use another assembler, rearrange the SEGMENT and PROC directives
; and make any other necessary changes to the source code.
; $EXAMPLES$
; FT_PUTKEY( -9 ) // Stuff the F10 key
; FT_PUTKEY( 276 ) // Stuff the Alt T key
; KEYSTROKE 28 // Stuff the F1 key using a User-Defined Command
; $END$
IDEAL
Public FT_PUTKEY
EXTRN __PARINFO:FAR
EXTRN __PARNI:FAR
EXTRN __RETL:FAR
SEGMENT _NANFOR WORD PUBLIC "CODE"
ASSUME CS:_NANFOR
PROC FT_PUTKEY FAR
XOR AX,AX ; PREPARE TO COUNT PARAMS
PUSH AX ; SAVE ON STACK
CALL __PARINFO ; GET PARAM COUNT
ADD SP,2 ; REALIGN STACK
OR AX,AX ; ZERO PARAMS?
JNZ TEST1 ; IF NOT, CONTINUE
JMP DONE ; RETURN VALUE = FALSE, GO TO END
TEST1: MOV AX,1 ; PREPARE TO CHECK PARAMETER #1
PUSH AX ; SAVE PARAMETER # ON STACK
CALL __PARINFO ; CALL PARAMETER INFO ROUTINE
ADD SP,2 ; REALIGN STACK
TEST AX,2 ; IS PARAMETER NUMERIC?
JNZ GET1 ; IF SO, CONTINUE
BADPARAM:XOR AX,AX ; SET RETURN VALUE TO FALSE
JMP DONE ; GO TO END
GET1: MOV AX,1 ; PREPARE TO RETRIEVE PARAMETER #1
PUSH AX ; SAVE PARAMETER # ON STACK
CALL __PARNI ; RETRIEVE PARAMETER
ADD SP,2 ; REALIGN STACK
CMP AX,385 ; TEST HIGHEST INKEY()
JG BadParam ; Bad INKEY() value
Cmp AX,-39 ; Test lowest INKEY()
JL BadParam ; Process error
CtrlF1: Mov CL,0 ; Set ASCII value to null
Cmp AX,-10 ; Is Ctrl F1 thru Alt F10?
JG F2 ; If not, check next range
Neg AX ; Get absolute value of AX
Add AL,74 ; Translate INKEY() to scan code
Mov CH,AL ; Move scan code to CH
JMP StuffIt ; Stuff the keystroke
F2: Or AX,AX ; See if key is F2 thru F10
JNS F1 ; If not, check next range
Neg AX ; Get absolute value of AX
Add AL,59 ; Translate INKEY() to scan code
Mov CH,AL ; Move scan code to CH
JMP StuffIt ; Stuff the keystroke
F1: Cmp AX,28 ; See if key is F1
JNE CtrlF ; If not, check next key
Mov CH,59 ; Supply scan code for F1
JMP StuffIt ; Stuff the keystroke
CtrlF: Cmp AX,6 ; See if key is Ctrl F or End
JNE CtrlW ; If not, check next key
Mov CH,79 ; Supply scan code for End
JMP StuffIt ; Stuff the keystroke
CtrlW: Cmp AX,23 ; See if key is Ctrl W or Ctrl End
JNE CtrlHome ; If not, check next key
Mov CH,117 ; Supply scan code for Ctrl End
JMP Short StuffIt ; Stuff the keystroke
CtrlHome:Cmp AX,29 ; See if key is Ctrl Home or Ctrl]
JNE CtrlV ; If not, check next key
Mov CH,119 ; Supply scan code for Ctrl Home
JMP Short StuffIt ; Stuff the keystroke
CtrlV: Cmp AX,22 ; See if key is Ins or Ctrl V
JNE ShiftTab ; If not, check next key
Mov CH,82 ; Supply scan code for Ctrl V
JMP Short StuffIt ; Stuff the keystroke
ShiftTab:Cmp AX,271 ; See if key is Shift Tab
JNE CtrlPgDn ; If not, check next key
Mov CH,15 ; Supply scan code for Shift Tab
JMP Short StuffIt ; Stuff the keystroke
CtrlPgDn:Cmp AX,30 ; See if key is Ctrl PgDn
JNE CtrlPgUp ; If not, check next key
Mov CH,118 ; Supply scan code for Ctrl PgDn
JMP Short StuffIt ; Stuff the keystroke
CtrlPgUp:Cmp AX,31 ; See if key is Ctrl PgUp
JNE AltQ ; If not, check next key
Mov CH,132 ; Supply scan code for Ctrl PgUp
JMP Short StuffIt ; Stuff the keystroke
AltQ: Cmp AX,272 ; See if key is Alt Q . . .
JL ASCII
Cmp AX,281 ; . . . thru Alt P
JG AltA
Mov CH,AL
JMP Short StuffIt
AltA: Cmp AX,286 ; See if key is Alt A . . .
JNL AltL
JMP BadParam
AltL: Cmp AX,294 ; . . . thru Alt L
JG AltZ
Mov CH,AL
JMP Short StuffIt
AltZ: Cmp AX,300 ; See if key is Alt Z . . .
JNL AltM
JMP BadParam
AltM: Cmp AX,306 ; . . . thru Alt M
JG Alt1
Mov CH,AL
Mov CL,0
JMP Short StuffIt
Alt1: Cmp AX,376 ; See if key is Alt 1 . . .
JNL AltNum
JMP BadParam
AltNum: Mov CH,AL
Mov CL,0
JMP Short StuffIt
ASCII: Or AH,AH ; See if key is plain ASCII
JZ Okay
JMP BadParam
Okay: Mov CX,AX
StuffIt: CLI ; Disable keyboard temporarily
Push DS ; Save DS
Xor AX,AX ; Clear AX
Mov DS,AX ; Point DS to low RAM
Mov AX,[Word Ptr 41Ch] ; Get tail pointer
Add AX,2 ; Make room for keystroke
Cmp AX,3Eh ; Need to wrap?
JNE IsItFull ; No, so continue
Mov AX,1Eh ; Wrap tail
IsItFull:Cmp AX,[Word Ptr 41Ah] ; Is buffer full?
JNE PutChar ; No, so continue
Xor AX,AX ; Set return value to .F.
Jmp Short Exit ; Quit
PutChar: Mov BX,[Word Ptr 41Ch] ; Get tail pointer
Add BX,400h ; Adjust offset by constant
Mov [Word Ptr BX],CX ; Stuff keystroke
Mov [Word Ptr 41Ch],AX ; Save new buffer tail
Mov AX,1 ; Set return value to .T.
Exit: STI ; Enable keystrokes again
Pop DS ; Restore DS
Done: Push AX ; Save return value on stack
Call __RetL ; Return it to Clipper app
Add SP,2 ; Realign stack
Ret
Endp FT_PutKey
Ends _NanFor
End