-
Notifications
You must be signed in to change notification settings - Fork 22
/
Copy pathkbhit.cc
305 lines (285 loc) · 13.7 KB
/
kbhit.cc
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
#include "kbhit.hh"
#include "langdefs.hh"
#undef kbhit
#undef getch
#ifdef __BORLANDC__
# include <dos.h> // for MK_FP
# include <conio.h>
static unsigned char KbStatus = 0;
int MyKbhit()
{
if(!KbStatus)
{
_asm { mov ah, 0x01; int 0x16; jnz keyfound }
return 0;
}
keyfound:
return 1;
}
int MyGetch()
{
register unsigned char r = KbStatus;
if(r) { KbStatus=0; return r; }
_asm { xor ax,ax; int 0x16 }
if(_AL) return _AL;
KbStatus = _AH;
return 0;
}
void KbIdle()
{
_asm { hlt }
}
#elif defined(__DJGPP__)
# include <dos.h>
static unsigned char KbStatus = 0;
int MyKbhit()
{
if(!KbStatus)
{
REGS r{};
r.h.ah = 1;
int86(0x16, &r, &r);
return (r.w.flags & 0x40) ? 0 : 1;
}
return 1;
}
int MyGetch()
{
unsigned char s = KbStatus;
if(s) { KbStatus=0; return s; }
REGS r{};
r.w.ax = 0;
int86(0x16, &r, &r);
if(r.h.al) return r.h.al;
KbStatus = r.h.ah;
return 0;
}
void KbIdle()
{
//__dpmi_yield();
__asm__ volatile("hlt");
// dpmi_yield is not used, because it's not implemented in dosbox
// Instead, we issue "hlt" and patch DOSBox to not produce an exception
/* HUGE WARNING: THIS *REQUIRES* A PATCHED DOSBOX,
* UNPATCHED DOSBOXES WILL TRIGGER AN EXCEPTION HERE */
}
#else // not borlandc, djgpp
#if 0
static unsigned kbhitptr = 0;
static unsigned char kbhitbuf[] =
{
// simulated input for testing with valgrind
' ','L', '1','0','0','0','\n',
' ','k',
' ','u',
' ','b',
' ','y'
};
int MyKbhit() { return (kbhitptr < sizeof(kbhitbuf) && std::rand()%100 == 0); }
int MyGetch() { return kbhitbuf[kbhitptr++]; }
#else
#include <SDL.h>
#include <cstdlib>
#include <string>
#include <string_view>
#define CTRL(c) ((c) & 0x1F)
static std::string pending_input;
bool kbshift=false;
static Uint32 last_ev_time=0, rewind_ptr=0;
extern void VgaRedraw(int);
static void ProcessEvent(SDL_Event& ev)
{
//fprintf(stderr, "ev type %u\n", ev.type);
switch(ev.type)
{
case SDL_WINDOWEVENT:
//fprintf(stderr, "window event %d\n", ev.window.event);
switch(ev.window.event)
{
case SDL_WINDOWEVENT_EXPOSED:
case SDL_WINDOWEVENT_RESIZED:
case SDL_WINDOWEVENT_SIZE_CHANGED:
VgaRedraw(1);
default:
break;
}
break;
case SDL_QUIT:
pending_input += CTRL('c');
break;
case SDL_KEYDOWN:
{
/*fprintf(stderr, "Dn: state=%u repeat=%u time=%u sym=%u scancode=%u mod=0x%X\n",
ev.key.state, ev.key.repeat, ev.key.timestamp,
ev.key.keysym.sym, ev.key.keysym.scancode, ev.key.keysym.mod);*/
if(ev.key.repeat && ev.key.timestamp == last_ev_time)
{
pending_input.erase(rewind_ptr);
}
last_ev_time = ev.key.timestamp;
rewind_ptr = pending_input.size();
bool alt = ev.key.keysym.mod & KMOD_LALT;
bool altgr = ev.key.keysym.mod & KMOD_RALT;
bool ctrl = ev.key.keysym.mod & (KMOD_LCTRL | KMOD_RCTRL);
bool shift = ev.key.keysym.mod & (KMOD_LSHIFT | KMOD_RSHIFT);
bool caps = ev.key.keysym.mod & KMOD_CAPS;
switch(ev.key.keysym.scancode)
{
case SDL_SCANCODE_LSHIFT: kbshift=true; break;
case SDL_SCANCODE_RSHIFT: kbshift=true; break;
#define ALPHA(c, rsym,shiftsym, ctrlsym, grsym, altsym) \
case c: \
if(altgr || (alt&&ctrl)) pending_input += grsym; \
else if(shift==!caps) pending_input += shiftsym; \
else if(alt) pending_input += altsym; \
else if(ctrl) pending_input += ctrlsym; \
else pending_input += rsym; \
break;
ALPHA(SDL_SCANCODE_A,'a','A', CTRL('A'), std::string_view("\0\36", 2), std::string_view("\0\36", 2))
ALPHA(SDL_SCANCODE_B,'b','B', CTRL('B'), std::string_view("\0\60", 2), std::string_view("\0\60", 2))
ALPHA(SDL_SCANCODE_C,'c','C', CTRL('C'), std::string_view("\0\56", 2), std::string_view("\0\56", 2))
ALPHA(SDL_SCANCODE_D,'d','D', CTRL('D'), std::string_view("\0\40", 2), std::string_view("\0\40", 2))
ALPHA(SDL_SCANCODE_E,'e','E', CTRL('E'), std::string_view("\325", 1), std::string_view("\0\22", 2))
ALPHA(SDL_SCANCODE_F,'f','F', CTRL('F'), std::string_view("\0\41", 2), std::string_view("\0\41", 2))
ALPHA(SDL_SCANCODE_G,'g','G', CTRL('G'), std::string_view("\0\42", 2), std::string_view("\0\42", 2))
ALPHA(SDL_SCANCODE_H,'h','H', CTRL('H'), std::string_view("\0\43", 2), std::string_view("\0\43", 2))
ALPHA(SDL_SCANCODE_I,'i','I', CTRL('I'), std::string_view("\0\27", 2), std::string_view("\0\27", 2))
ALPHA(SDL_SCANCODE_J,'j','J', CTRL('J'), std::string_view("\0\44", 2), std::string_view("\0\44", 2))
ALPHA(SDL_SCANCODE_K,'k','K', CTRL('K'), std::string_view("\0\45", 2), std::string_view("\0\45", 2))
ALPHA(SDL_SCANCODE_L,'l','L', CTRL('L'), std::string_view("\0\46", 2), std::string_view("\0\46", 2))
ALPHA(SDL_SCANCODE_M,'m','M', CTRL('M'), std::string_view("\346", 1), std::string_view("\0\62", 2))
ALPHA(SDL_SCANCODE_N,'n','N', CTRL('N'), std::string_view("\0\61", 2), std::string_view("\0\61", 2))
ALPHA(SDL_SCANCODE_O,'o','O', CTRL('O'), std::string_view("\0\30", 2), std::string_view("\0\30", 2))
ALPHA(SDL_SCANCODE_P,'p','P', CTRL('P'), std::string_view("\0\31", 2), std::string_view("\0\31", 2))
ALPHA(SDL_SCANCODE_Q,'q','Q', CTRL('Q'), std::string_view("\100", 1), std::string_view("\0\20", 2))
ALPHA(SDL_SCANCODE_R,'r','R', CTRL('R'), std::string_view("\0\23", 2), std::string_view("\0\23", 2))
ALPHA(SDL_SCANCODE_S,'s','S', CTRL('S'), std::string_view("\0\37", 2), std::string_view("\0\37", 2))
ALPHA(SDL_SCANCODE_T,'t','T', CTRL('T'), std::string_view("\0\24", 2), std::string_view("\0\24", 2))
ALPHA(SDL_SCANCODE_U,'u','U', CTRL('U'), std::string_view("\0\26", 2), std::string_view("\0\26", 2))
ALPHA(SDL_SCANCODE_V,'v','V', CTRL('V'), std::string_view("\0\57", 2), std::string_view("\0\57", 2))
ALPHA(SDL_SCANCODE_W,'w','W', CTRL('W'), std::string_view("\0\21", 2), std::string_view("\0\21", 2))
ALPHA(SDL_SCANCODE_X,'x','X', CTRL('X'), std::string_view("\0\55", 2), std::string_view("\0\55", 2))
ALPHA(SDL_SCANCODE_Y,'y','Y', CTRL('Y'), std::string_view("\0\25", 2), std::string_view("\0\25", 2))
ALPHA(SDL_SCANCODE_Z,'z','Z', CTRL('Z'), std::string_view("\0\54", 2), std::string_view("\0\54", 2))
ALPHA(SDL_SCANCODE_0,'0','=', CTRL('0'), std::string_view("\175", 1), std::string_view("\0\201",2))
ALPHA(SDL_SCANCODE_1,'1','!', CTRL('1'), std::string_view("\0\170",2), std::string_view("\0\170",2))
ALPHA(SDL_SCANCODE_2,'2','"', CTRL('2'), std::string_view("\100", 1), std::string_view("\0\171",2))
ALPHA(SDL_SCANCODE_3,'3','#', CTRL('3'), std::string_view("\234", 1), std::string_view("\0\172",2))
ALPHA(SDL_SCANCODE_4,'4','\317', CTRL('4'), std::string_view("\44", 1), std::string_view("\0\173",2))
ALPHA(SDL_SCANCODE_5,'5','%', CTRL('5'), std::string_view("\325", 1), std::string_view("\0\174",2))
ALPHA(SDL_SCANCODE_6,'6','&', CTRL('6'), std::string_view("\0\175",2), std::string_view("\0\175",2))
ALPHA(SDL_SCANCODE_7,'7','/', CTRL('7'), std::string_view("\173", 1), std::string_view("\0\176",2))
ALPHA(SDL_SCANCODE_8,'8','(', CTRL('8'), std::string_view("\133", 1), std::string_view("\0\177",2))
ALPHA(SDL_SCANCODE_9,'9',')', CTRL('9'), std::string_view("\135", 1), std::string_view("\0\200",2))
//
ALPHA(SDL_SCANCODE_COMMA, ',',';', CTRL(','), std::string_view("\0\74", 2), std::string_view("\0\74",2))
ALPHA(SDL_SCANCODE_PERIOD,'.',':', CTRL(','), std::string_view("\0\76", 2), std::string_view("\0\76",2))
ALPHA(SDL_SCANCODE_SLASH, '-','_', CTRL(','), std::string_view("\0\75", 1), std::string_view("\0\75",2))
//
ALPHA(SDL_SCANCODE_SEMICOLON, '\224', '\231', CTRL(','), std::string_view("\0\47", 2), std::string_view("\0\47",2))
ALPHA(SDL_SCANCODE_APOSTROPHE,'\204', '\216', CTRL(','), std::string_view("\0\48", 2), std::string_view("\0\48",2))
ALPHA(SDL_SCANCODE_BACKSLASH, '\'', '*', CTRL(','), std::string_view("\0\49", 2), std::string_view("\0\49",2))
//
ALPHA(SDL_SCANCODE_LEFTBRACKET, '\206', '\217', CTRL(','), std::string_view("\0\32", 2), std::string_view("\0\32",2))
ALPHA(SDL_SCANCODE_RIGHTBRACKET,'"', '^', CTRL(','), std::string_view("\0\33", 2), std::string_view("\0\33",2))
//
ALPHA(SDL_SCANCODE_MINUS, '+', '?', CTRL(','), std::string_view("\134", 1), std::string_view("\0\202",2))
ALPHA(SDL_SCANCODE_EQUALS, '\'','`', CTRL(','), std::string_view("\174", 1), std::string_view("\0\203",2))
ALPHA(SDL_SCANCODE_SPACE, ' ', ' ', ' ', " ", " ")
#undef ALPHA
//
#define FUNC(n, plainsym, shiftsym, altsym, ctrlsym) \
case SDL_SCANCODE_##n: \
if(alt||altgr) pending_input += std::string_view("\0" altsym,2); \
else if(ctrl) pending_input += std::string_view("\0" ctrlsym,2); \
else if(shift) pending_input += std::string_view("\0" shiftsym,2); \
else pending_input += std::string_view("\0" plainsym,2); \
break;
FUNC(F1, "\73", "\124", "\150", "\136")
FUNC(F2, "\74", "\125", "\151", "\137")
FUNC(F3, "\75", "\126", "\152", "\140")
FUNC(F4, "\76", "\127", "\153", "\141")
FUNC(F5, "\77", "\130", "\154", "\142")
FUNC(F6, "\100","\131", "\155", "\143")
FUNC(F7, "\101","\132", "\156", "\144")
FUNC(F8, "\102","\133", "\157", "\145")
FUNC(F9, "\103","\134", "\160", "\146")
FUNC(F10,"\104","\135", "\161", "\147")
FUNC(F11,"\205","\207", "\213", "\211")
FUNC(F12,"\206","\210", "\214", "\212")
case SDL_SCANCODE_KP_7: FUNC(HOME, "\107", "\107", "\227", "\167")
case SDL_SCANCODE_KP_8: FUNC(UP, "\110", "\110", "\230", "\215")
case SDL_SCANCODE_KP_9: FUNC(PAGEUP, "\111", "\111", "\231", "\204")
case SDL_SCANCODE_KP_4: FUNC(LEFT, "\113", "\113", "\233", "\163")
FUNC(KP_5, "\114", "\114", "\234", "\217")
case SDL_SCANCODE_KP_6: FUNC(RIGHT, "\115", "\115", "\235", "\164")
case SDL_SCANCODE_KP_1: FUNC(END, "\117", "\117", "\237", "\165")
case SDL_SCANCODE_KP_2: FUNC(DOWN, "\120", "\120", "\240", "\221")
case SDL_SCANCODE_KP_3: FUNC(PAGEDOWN, "\121", "\121", "\241", "\166")
case SDL_SCANCODE_KP_0: FUNC(INSERT, "\122", "\5", "\242", "\4")
case SDL_SCANCODE_KP_PERIOD: FUNC(DELETE, "\123", "\7", "\243", "\6")
#undef FUNC
case SDL_SCANCODE_BACKSPACE:
if(altgr||(alt&&ctrl)) pending_input += std::string_view("\0\11",2);
else if(alt) pending_input += std::string_view("\0\10",2);
else pending_input += '\10';
break;
case SDL_SCANCODE_TAB:
if(altgr||alt) pending_input += std::string_view("\0\245",2);
else if(ctrl) pending_input += std::string_view("\0\224",2);
else if(shift) pending_input += std::string_view("\0\17",2);
else pending_input += '\11';
break;
case SDL_SCANCODE_ESCAPE:
pending_input += '\33';
break;
case SDL_SCANCODE_RETURN: case SDL_SCANCODE_KP_ENTER:
if(ctrl) pending_input += '\n';
else pending_input += '\r';
break;
default: break;
}
break;
}
case SDL_KEYUP:
switch(ev.key.keysym.scancode)
{
case SDL_SCANCODE_LSHIFT: kbshift=false; break;
case SDL_SCANCODE_RSHIFT: kbshift=false; break;
default: break;
}
break;
}
}
int MyKbhit()
{
if(!pending_input.empty())
return true;
SDL_Event ev;
while(SDL_PollEvent(&ev))
ProcessEvent(ev);
return !pending_input.empty();
}
int MyGetch()
{
while(pending_input.empty())
{
KbIdle();
}
unsigned char result = pending_input[0];
pending_input.erase(0, 1);
return result;
}
void KbIdle()
{
if(!pending_input.empty()) return;
VgaRedraw(0);
// Wait for an event, update cursor and stuff though
SDL_Event ev;
if(SDL_WaitEventTimeout(&ev, 1000/60))
do {
ProcessEvent(ev);
} while(SDL_PollEvent(&ev));
}
#endif
#endif