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PCKEY.HPP
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C/C++ Source or Header
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1991-07-30
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324 lines
/*
pckey.hpp
7-30-91
PC keyboard class for Borland C++
Copyright 1991
John W. Small
All rights reserved
Use freely but acknowledge authorship and copyright.
PSW / Power SoftWare
P.O. Box 10072
McLean, Virginia 22102 8072 USA
John Small
Voice: (703) 759-3838
CIS: 73757,2233
*/
#ifndef PCKEY_HPP
#define PCKEY_HPP
#include <dos.h>
// Typematic Rate = 10 x characters per second
// characters per second = TypeMaticRate / 10
enum TypeMaticRate { TMR300, TMR267, TMR240, TMR218,
TMR200, TMR185, TMR171, TMR160, TMR150, TMR133,
TMR120, TMR109, TMR100, TMR092, TMR086, TMR080,
TMR075, TMR067, TMR060, TMR055, TMR050, TMR046,
TMR043, TMR040, TMR037, TMR033, TMR030, TMR027,
TMR025, TMR023, TMR021, TMR020 };
// Typematic Delay in milliseconds
enum TypeMaticDelay { TMD250, TMD500, TMD750, TMD1000 };
// Returned by extended keys on 101/102 keyboards
// that duplicate keys available on 84 key format.
// Consider the home key ...
// On number pad: PC.ascii() == 0 PC.scan() == 71
// By itself: PC.ascii() == 224 PC.scan() == 71
#define ExtendKey 224
// Do not instantiate!
class PCKey {
// Variables are static to save having to dereference
// the "this" pointer in the inline member functions.
static unsigned asciiScan;
static unsigned char enhancedKeyBrd;
static unsigned enhancedShiftMask;
static unsigned fastTypeMaticExit;
public:
PCKey();
int enhanced() { return (int) enhancedKeyBrd; }
// Ascii code of last character read with getch(), getkey(),
// or character waiting with kbhit().
int ascii()
{ return (int)(asciiScan & 0x00FF); }
// Scan code of last character read with gethch(), getkey(),
// or character waiting with kbhit().
int scan()
{ return (int)((asciiScan & 0xFF00) >> 8); }
// special characters return zero or ExtendKey, see scan()
int getch() {
_AH = enhancedKeyBrd;
geninterrupt(0x16);
asciiScan = _AX;
return (int) _AL;
}
// special characters return the negative of their scan code
// non special characters return their ascii code
int getkey() {
_AH = enhancedKeyBrd;
geninterrupt(0x16);
asciiScan = _AX;
return ((_AL && _AL != ExtendKey)?
(int)_AL : -(int)_AH);
}
int kbhit() {
_AH = 0x01 | enhancedKeyBrd;
geninterrupt(0x16);
asciiScan = _AX;
return !(int)(_FLAGS & 0x0040);
}
unsigned shift() {
_AH = 0x02 | enhancedKeyBrd;
geninterrupt(0x16);
return (_AX & enhancedShiftMask);
}
unsigned InsertStateActive()
{ return (shift() & 0x0080); }
unsigned CapsLockActive()
{ return (shift() & 0x0040); }
unsigned NumLockActive()
{ return (shift() & 0x0020); }
unsigned ScrollLockActive()
{ return (shift() & 0x0010); }
unsigned AltPressed()
{ return (shift() & 0x0008); }
unsigned CtrlPressed()
{ return (shift() & 0x0004); }
unsigned LeftShiftPressed()
{ return (shift() & 0x0002); }
unsigned RightShiftPressed()
{ return (shift() & 0x0001); }
unsigned ShiftPressed()
{ return (shift() & 0x0003); }
unsigned SysReqPressed()
{ return (shift() & 0x8000); }
unsigned CapsLockPressed()
{ return (shift() & 0x4000); }
unsigned NumLockPressed()
{ return (shift() & 0x2000); }
unsigned ScrollLockPressed()
{ return (shift() & 0x1000); }
unsigned RightAltPressed()
{ return (shift() & 0x0800); }
unsigned RightCtrlPressed()
{ return (shift() & 0x0400); }
unsigned LeftAltPressed()
{ return (shift() & 0x0200); }
unsigned LeftCtrlPressed()
{ return (shift() & 0x0100); }
void setTypeMatic(
enum TypeMaticRate TMrate = TMR109,
enum TypeMaticDelay TMdelay = TMD500) {
_BX = (TMdelay << 8) | TMrate;
_AX = 0x0305;
geninterrupt(0x16);
}
void fastTypeMatic() { setTypeMatic(TMR300,TMD250); }
void fastTypeMaticOnExit() { fastTypeMaticExit = 1; }
int putch(unsigned asciiScan) {
_CX = asciiScan;
_AH = 0x05;
geninterrupt(0x16);
return !((int) _AL);
}
void flush();
~PCKey() { if (fastTypeMaticExit) fastTypeMatic();
else setTypeMatic(); }
};
extern PCKey PCK; // Only instant, do not instantiate!
// Note: Ctrl keys are not special!
// Returned by getch() and ascii().
#define CtrlA 1
#define CtrlB 2
#define CtrlC 3
#define CtrlD 4
#define CtrlE 5
#define CtrlF 6
#define CtrlG 7
#define CtrlH 8
#define CtrlI 9
#define CtrlJ 10
#define CtrlK 11
#define CtrlL 12
#define CtrlM 13
#define CtrlN 14
#define CtrlO 15
#define CtrlP 16
#define CtrlQ 17
#define CtrlR 18
#define CtrlS 19
#define CtrlT 20
#define CtrlU 21
#define CtrlV 22
#define CtrlW 23
#define CtrlX 24
#define CtrlY 25
#define CtrlZ 26
// Special Key Codes returned via scan() when getch() == 0.
#define AltA 30
#define AltB 48
#define AltC 46
#define AltD 32
#define AltE 18
#define AltF 33
#define AltG 34
#define AltH 35
#define AltI 23
#define AltJ 36
#define AltK 37
#define AltL 38
#define AltM 50
#define AltN 49
#define AltO 24
#define AltP 25
#define AltQ 16
#define AltR 19
#define AltS 31
#define AltT 20
#define AltU 22
#define AltV 47
#define AltW 17
#define AltX 45
#define AltY 21
#define AltZ 44
#define Home 71
#define UpArr 72
#define PgUp 73
#define LArr 75
#define RArr 77
#define EndKey 79
#define DnArr 80
#define PgDn 81
#define InsKey 82
#define DelKey 83
#define CtrlHome 119
#define CtrlPgUp 132
#define CtrlLArr 115
#define CtrlRArr 116
#define CtrlEnd 117
#define CtrlPgDn 118
#define Alt1 120
#define Alt2 121
#define Alt3 122
#define Alt4 123
#define Alt5 124
#define Alt6 125
#define Alt7 126
#define Alt8 127
#define Alt9 128
#define Alt0 129
#define AltHyphen 130
#define AltEquals 131
#define CtrlPrtSc 114
#define ShiftTab 15
#define F1 59
#define ShiftF1 84
#define CtrlF1 94
#define AltF1 104
#define F2 60
#define ShiftF2 85
#define CtrlF2 95
#define AltF2 105
#define F3 61
#define ShiftF3 86
#define CtrlF3 96
#define AltF3 106
#define F4 62
#define ShiftF4 87
#define CtrlF4 97
#define AltF4 107
#define F5 63
#define ShiftF5 88
#define CtrlF5 98
#define AltF5 108
#define F6 64
#define ShiftF6 89
#define CtrlF6 99
#define AltF6 109
#define F7 65
#define ShiftF7 90
#define CtrlF7 100
#define AltF7 110
#define F8 66
#define ShiftF8 91
#define CtrlF8 101
#define AltF8 111
#define F9 67
#define ShiftF9 92
#define CtrlF9 102
#define AltF9 112
#define F10 68
#define ShiftF10 93
#define CtrlF10 103
#define AltF10 113
// Some BIOS' don't return these.
#define F11 133
#define ShiftF11 135
#define CtrlF11 137
#define AltF11 139
#define F12 134
#define ShiftF12 136
#define CtrlF12 138
#define AltF12 140
// Non special - standard character codes.
#define ESC 27
#define CR 13
#define TAB 9
#define BACKSP 8
#define SPACE 32
#define DelCh 127
#endif