-
Notifications
You must be signed in to change notification settings - Fork 11
/
Copy pathindex.html
591 lines (512 loc) · 14.5 KB
/
index.html
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
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
<html>
<head>
<title>Javascript Brainfuck Interpreter / Debugger</title>
<script language="Javascript" src="arrays.js"></script>
<script>
// interactive input mode:
//
// a ascii char
// #97 decimal char index
// !141 octal char index
// $61 hex char index
var g_debugging = 0;
var g_memory = Array();
var g_max_mem = 256;
var g_max_val = 255;
var g_ip = 0;
var g_mp = 0;
var g_dp = 0;
var g_program = new Array();
var g_targets = new Array();
var g_input = new Array();
var g_output = '';
var g_viewer_width = 60;
var g_quit_debug_run = 0;
var g_debugging_running = 0;
var g_prompt_for_input = 0;
var g_running = 0;
var g_linebreaker = "\n";
function init(){
if (navigator.userAgent.toLowerCase().indexOf("msie") != -1){
g_linebreaker = "\r";
}
document.addEventListener('keypress', function(e) {
//n for single step
if (e.keyCode == 110)
document.getElementById('button_step').click();
//c for run to next breakpoint
else if (e.keyCode == 99)
document.getElementById('button_run_debug').click();
}, false);
}
function init_memory(){
for(var i=0; i<=g_max_mem; i++){
g_memory[i] = 0;
}
g_mp = 0;
}
function init_io(){
g_dp = 0;
g_output = '';
}
function init_prog(code){
g_program.length = 0;
for(var i=0; i<code.length; i++){
var op = code.charAt(i)
// check it's not a carriage return or anything that will
// break the program viewer too badly :)
if (is_valid_op(op)){
g_program[g_program.length] = op;
}
}
g_ip = 0;
init_targets();
}
function init_targets(){
g_targets.length = 0;
var temp_stack = new Array();
for(var i=0; i<g_program.length; i++){
var op = g_program[i];
if (op == '['){
temp_stack.push(i);
}
if (op == ']'){
if (temp_stack.length == 0) alert('Parseing error: ] with no matching [');
var target = temp_stack.pop();
g_targets[i] = target;
g_targets[target] = i;
}
}
if (temp_stack.length > 0) alert('Parseing error: [ with no matching ]');
}
function init_input(){
g_prompt_for_input = document.getElementById('input_mode_1').checked;
g_input.length = 0;
var in_data = document.getElementById('edit_input').value;
for(var i=0; i<in_data.length; i++){
g_input[g_input.length] = in_data.charAt(i);
}
g_dp = 0;
}
function get_input(){
if (g_prompt_for_input){
var data = window.prompt("Enter an input character (use #xxx to specify a decimal code, !xxx for an octal code, or $xxx for a hex code):", "#0");
if ((data == null) || (!data)) return 0;
if (data.charAt(0) == '#'){
return parseInt(data.substr(1), 10);
}
if (data.charAt(0) == '!'){
return eval('0'+data.substr(1));
}
if (data.charAt(0) == '$'){
return eval('0x'+data.substr(1));
}
return data.charCodeAt(0);
}else{
var result = (g_dp >= g_input.length)?0:g_input[g_dp].charCodeAt(0);
g_dp++;
return result;
}
}
function is_valid_op(op){
if (op == '+') return 1;
if (op == '-') return 1;
if (op == '>') return 1;
if (op == '<') return 1;
if (op == '[') return 1;
if (op == ']') return 1;
if (op == '.') return 1;
if (op == ',') return 1;
if (op == '#') return 1;
return 0;
}
function put_output(c){
g_output += c;
}
function execute_opcode(op){
switch(op){
case '+':
g_memory[g_mp]++;
if (g_memory[g_mp] > g_max_val) g_memory[g_mp] = 0;
break;
case '-':
g_memory[g_mp]--;
if (g_memory[g_mp] < 0) g_memory[g_mp] = g_max_val;
break;
case '>':
g_mp++;
if (g_mp >= g_max_mem) g_mp = 0;
break;
case '<':
g_mp--;
if (g_mp < 0) g_mp = g_max_mem-1;
break;
case '[':
if (g_memory[g_mp] == 0) g_ip = g_targets[g_ip];
break;
case ']':
g_ip = g_targets[g_ip] - 1;
break;
case '.':
put_output(String.fromCharCode(g_memory[g_mp]));
break;
case ',':
g_memory[g_mp] = get_input();
break;
}
}
function bf_interpret(prog, input){
if (g_running){
bf_stop_run();
return;
}
g_running = 1;
init_prog(prog);
init_memory();
init_io();
init_input();
disable_text_box('edit_source');
disable_text_box('edit_input');
disable_text_box('edit_output');
disable_text_box('edit_progs');
disable_button('input_mode_1');
disable_button('input_mode_2');
disable_button('button_debug');
change_button_caption('button_run', 'Stop');
bf_run_step();
}
function bf_stop_run(){
enable_text_box('edit_source');
enable_text_box('edit_input');
enable_text_box('edit_output');
enable_text_box('edit_progs');
enable_button('input_mode_1');
enable_button('input_mode_2');
enable_button('button_debug');
change_button_caption('button_run', 'Run');
sync_input();
g_running = 0;
}
function bf_run_done(){
bf_stop_run();
document.getElementById('edit_output').value = g_output;
}
function bf_run_step(){
// execute instrcution under ip
var op = g_program[g_ip];
execute_opcode(op);
// increment ip
g_ip++;
if (g_ip >= g_program.length){
bf_run_done();
return;
}
window.setTimeout('bf_run_step();', 0);
}
function update_memview(){
var mem_slots = Math.floor(g_viewer_width / 4);
var pre_slots = Math.floor(mem_slots / 2);
var low_slot = g_mp - pre_slots;
if (low_slot < 0) low_slot += g_max_mem;
var line_1 = '';
for(var i=0; i<mem_slots; i++){
var slot = low_slot + i;
if (slot >= g_max_mem) slot -= g_max_mem;
var label = pad_num(g_memory[slot], 3);
line_1 += label + ' ';
}
var line_2 = '';
for(var i=0; i<pre_slots; i++){
line_2 += ' ';
}
line_2 += '^';
var line_3 = '';
for(var i=0; i<pre_slots; i++){
line_3 += ' ';
}
line_3 += 'mp='+g_mp;
var line_4 = '';
for(var i=0; i<mem_slots; i++){
var slot = low_slot + i;
if (slot >= g_max_mem) slot -= g_max_mem;
var label = pad_num(slot, 3);
line_4 += label + ' ';
}
set_viewdata('memview', line_1 + g_linebreaker + line_2 + g_linebreaker + line_3 + g_linebreaker + line_4);
}
function pad_num(a, b){
var c = new String(a);
for(var i=c.length; i<b; i++) c = '0'+c;
return c;
}
function update_progview(){
var pre_slots = Math.floor(g_viewer_width / 2);
var low_slot = g_ip - pre_slots;
var line_1 = '';
for(var i=0; i<g_viewer_width; i++){
var slot = low_slot + i;
if ((slot >= 0) && (slot < g_program.length)){
line_1 += g_program[slot];
}else{
line_1 += '_';
}
}
var line_2 = '';
for(var i=0; i<pre_slots; i++){
line_2 += ' ';
}
line_2 += '^';
var line_3 = '';
for(var i=0; i<pre_slots; i++){
line_3 += ' ';
}
line_3 += 'ip='+g_ip;
set_viewdata('progview', line_1 + g_linebreaker + line_2 + g_linebreaker + line_3);
}
function update_inputview(){
if (g_prompt_for_input){
set_viewdata('inputview', "-input prompt mode-");
}else{
var line_1 = g_input.join('');
var line_2 = '';
for (var i=0; i<g_dp; i++) line_2 += ' ';
line_2 += '^';
set_viewdata('inputview', line_1 + g_linebreaker + line_2);
}
}
function update_outputview(){
var line_1 = g_output;
var line_2 = '';
for (var i=0; i<g_output.length; i++) line_2 += ' ';
line_2 += '^';
set_viewdata('outputview', line_1 + g_linebreaker + line_2);
}
function set_viewdata(view, data){
var new_node = document.createTextNode(data);
var p_node = document.getElementById(view);
p_node.replaceChild(new_node, p_node.childNodes[0]);
}
function run(f){
bf_interpret(f.source.value, f.input.value);
}
function debug_done(){
disable_button('button_step');
disable_button('button_run_debug');
}
function debug_toggle(f){
if (g_debugging == 1){
g_debugging = 0;
enable_text_box('edit_source');
enable_text_box('edit_input');
enable_text_box('edit_output');
enable_text_box('edit_progs');
enable_button('button_run');
enable_button('input_mode_1');
enable_button('input_mode_2');
change_button_caption('button_debug', 'Start Debugger');
disable_button('button_step');
disable_button('button_run_debug');
set_viewdata('progview', ' ');
set_viewdata('memview', ' ');
set_viewdata('inputview', ' ');
set_viewdata('outputview', ' ');
sync_input();
}else{
g_debugging = 1;
disable_text_box('edit_source');
disable_text_box('edit_input');
disable_text_box('edit_output');
disable_text_box('edit_progs');
disable_button('button_run');
disable_button('input_mode_1');
disable_button('input_mode_2');
change_button_caption('button_debug', 'Quit Debugger');
enable_button('button_step');
enable_button('button_run_debug');
start_debugger();
}
}
function start_debugger(){
init_memory();
init_io();
init_prog(document.getElementById('edit_source').value);
init_input();
update_memview();
update_progview();
update_inputview();
update_outputview();
}
function run_step(){
var op = g_program[g_ip];
execute_opcode(op);
g_ip++;
update_memview();
update_progview();
update_inputview();
update_outputview();
if (g_ip >= g_program.length){
debug_done();
//alert("done!");
}
}
function start_debug_run(){
disable_button('button_debug');
disable_button('button_step');
change_button_caption('button_run_debug', 'Stop Running (c)');
g_debugging_running = 1;
}
function stop_debug_run(){
enable_button('button_debug');
enable_button('button_step');
change_button_caption('button_run_debug', 'Run To Breakpoint (c)');
g_debugging_running = 0;
}
function run_debug(){
if (g_debugging_running){
g_quit_debug_run = 1;
}else{
start_debug_run();
g_quit_debug_run = 0;
run_debug_step();
}
}
function run_debug_step(){
run_step();
if ((g_program[g_ip] == '#') || g_quit_debug_run || (g_ip >= g_program.length)){
stop_debug_run();
if (g_ip >= g_program.length){
debug_done();
}
return;
}
window.setTimeout('run_debug_step();', 0);
}
function disable_text_box(name){
var elm = document.getElementById(name);
elm.disabled = true;
elm.style.backgroundColor = '#cccccc';
}
function enable_text_box(name){
var elm = document.getElementById(name);
elm.disabled = false;
elm.style.backgroundColor = '';
}
function disable_button(name){
var elm = document.getElementById(name);
elm.disabled = true;
}
function enable_button(name){
var elm = document.getElementById(name);
elm.disabled = false;
}
function change_button_caption(name, caption){
var elm = document.getElementById(name);
elm.value = caption;
}
function sync_input(){
if (document.getElementById('input_mode_1').checked){
disable_text_box('edit_input');
}else{
enable_text_box('edit_input');
}
}
</script>
<style>
body {
margin: 0px;
background-color: #eeeeee;
color: #000000;
font-family: Arial, Helvetica, Sans-serif;
}
textarea.editsmall {
width: 400px;
height: 100px;
}
textarea.edit {
width: 400px;
height: 200px;
}
div.main {
padding: 6px;
border: 1px solid #000000;
background-color: #dddddd;
}
pre.viewer {
width: 500px;
padding: 6px;
border: 1px solid #000000;
background-color: #dddddd;
margin: 0px;
}
</style>
</head>
<body onload="init();">
<!-- NAV -->
<div id="page">
<form name="mainform">
<table cellspacing="20" cellpadding="0" border="0" align="center">
<tr valign="top">
<td colspan="2">
<h1>Javascript Brainfuck Interpreter / Debugger</h1>
<b>By <a href="http://www.iamcal.com/">Cal Henderson</a></b>
|
Source available on <a href="https://github.com/iamcal/brainfuck-debug">Github</a>
<br>
<hr>
</td>
</tr>
<tr valign="top">
<td>
Program:<br>
<select onchange="this.form.source.value=this.options[this.selectedIndex].value; this.selectedIndex=0;" id="edit_progs">
<option value="">Example programs...</option>
<option value="++++++++++[>+++++++>++++++++++>+++>+<<<<-]>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>.">Hello World</option>
<option value=",[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>++++++++++++++<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>>+++++[<----->-]<<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>++++++++++++++<-[>+<-[>+<-[>+<-[>+<-[>+<-[>++++++++++++++<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>>+++++[<----->-]<<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>+<-[>++++++++++++++<-[>+<-]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]>.[-]<,]">Rot 13 (slow!)</option>
<option value="+++++++++++>+>>>>++++++++++++++++++++++++++++++++++++++++++++>++++++++++++++++++++++++++++++++<<<<<<[>[>>>>>>+>+<<<<<<<-]>>>>>>>[<<<<<<<+>>>>>>>-]<[>++++++++++[-<-[>>+>+<<<-]>>>[<<<+>>>-]+<[>[-]<[-]]>[<<[>>>+<<<-]>>[-]]<<]>>>[>>+>+<<<-]>>>[<<<+>>>-]+<[>[-]<[-]]>[<<+>>[-]]<<<<<<<]>>>>>[++++++++++++++++++++++++++++++++++++++++++++++++.[-]]++++++++++<[->-<]>++++++++++++++++++++++++++++++++++++++++++++++++.[-]<<<<<<<<<<<<[>>>+>+<<<<-]>>>>[<<<<+>>>>-]<-[>>.>.<<<[-]]<<[>>+>+<<<-]>>>[<<<+>>>-]<<[<+>-]>[<+>-]<<<-]">Fibonacci Numbers</option>
<option value="++++++++++++++++++++#++++++++++++++++++++#++++++++++++++++++++#++++++++++++++++++++#++++++++++++++++++++#-.--.+++++++++++.">Breakpoints Demo</option>
</select><br>
<textarea id="edit_source" name="source" wrap="virtual" class="edit"></textarea><br>
<br>
Input:<br>
<input type="radio" id="input_mode_1" name="input_mode" value="1" onclick="sync_input();"> Prompt for input as needed<br>
<input type="radio" id="input_mode_2" name="input_mode" value="2" onclick="sync_input();" checked> Pre-supply input:<br>
<textarea id="edit_input" name="input" wrap="virtual" class="editsmall"></textarea><br>
<br>
Output:<br>
<textarea id="edit_output" name="output" wrap="virtual" class="editsmall"></textarea><br>
<br>
</td>
<td>
<br>
<input type="button" value="Run" onclick="run(this.form);" id="button_run">
<input type="button" value="Start Debugger" onclick="debug_toggle(this.form);" id="button_debug">
<input type="button" value="Single Step (n)" onclick="run_step();" disabled id="button_step">
<input type="button" value="Run To Breakpoint (c)" onclick="run_debug();" disabled id="button_run_debug">
<br>
<br>
Source Viewer:<br>
<pre class="viewer" id="progview"> </pre>
<br>
Memory Viewer:<br>
<pre class="viewer" id="memview"> </pre>
<br>
Input Viewer:<br>
<pre class="viewer" id="inputview"> </pre>
<br>
Output Viewer:<br>
<pre class="viewer" id="outputview"> </pre>
<br>
<b>Note:</b> The hash ("#") character marks a breakpoint.
</td>
</tr>
<tr valign="top">
<td colspan="2">
Example programs taken from <a href="http://esoteric.sange.fi/brainfuck/">the Brainfuck Archive</a>
</td>
</tr>
</table>
</form>
</div>
<!-- TRACK -->
</body>
</html>