summaryrefslogtreecommitdiffstats
path: root/users/doogle999/doogle999.c
blob: c9ee125741fa24eaa9fc4b6f14f3e5fed6957d8b (plain)
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
#include "doogle999.h"

static unsigned char inputLocation = 0; // Current index in text input

static double calc(const char input[CALC_BUFFER_SIZE +1]) // Finds value of input char array, relatively small and fast I think
{
  char inputToken[CALC_BUFFER_SIZE + 1]; // Input buffer, used when a single token (generally a number) takes up more
  unsigned char inputTokenLocation = 0, inputLocation = 0; // Keep track of indices

  struct Token tokens[CALC_BUFFER_SIZE + 1]; // Input, converted to tokens, one extra large to accomodate for possible negative sign then open parenthesis as first character
  unsigned char tokenCount = 0; // Keep track of index

  bool dashAsMinus = false; // Kind of a hacky solution to determining whether to treat a dash as a minus sign or a negative sign

  while(inputLocation < CALC_BUFFER_SIZE + 1)
  {
    char digit = input[inputLocation];

    if(inputLocation == 0 && input[inputLocation] == CALC_CHAR_SUB && input[inputLocation + 1] == CALC_CHAR_BEG)
    {
      tokens[tokenCount].raw.num = 0;
      tokens[tokenCount].isNum = true;

      tokenCount++;
      dashAsMinus = true;
    }

    if ((digit >= '0' && digit <= '9') || /* valid digit */
        (inputTokenLocation != 0 && input[inputLocation] == CALC_CHAR_DEC) || /* valid floating point */
        (!dashAsMinus && inputTokenLocation == 0 && input[inputLocation] == CALC_CHAR_SUB)) /* - is negative sign */
    {
      inputToken[inputTokenLocation] = input[inputLocation];
      inputTokenLocation++;
      inputLocation++;
      continue;
    }

    if(inputTokenLocation != 0)
    {
      // sscanf(inputToken, "%lf", &tokens[tokenCount].raw.num); // I would like to use sscanf here, but the small version of stdio.h on the chip doesn't allow sscanf or its sister functions to be used to process floats
      tokens[tokenCount].raw.num = atof(inputToken);
      tokens[tokenCount].isNum = true;
      for(unsigned char i = 0; i < inputTokenLocation + 1; i++)
      {
        inputToken[i] = '\0';
      }
      inputTokenLocation = 0;
      tokenCount++;
      dashAsMinus = true;
      continue;
    }

    /* inputTokenLocation == 0 */
    tokens[tokenCount].isNum = false;
    tokens[tokenCount].raw.op.c = input[inputLocation];
    tokens[tokenCount].raw.op.priority = 0;
    tokens[tokenCount].raw.op.ltr = true;
    dashAsMinus = false;

    switch(input[inputLocation])
    {
      case CALC_CHAR_BEG:
        break;
      case CALC_CHAR_END:
        dashAsMinus = true;
        break;
      case CALC_CHAR_ADD:
        tokens[tokenCount].raw.op.priority = CALC_PRIO_ADD;
        break;
      case CALC_CHAR_SUB:
        tokens[tokenCount].raw.op.priority = CALC_PRIO_SUB;
        break;
      case CALC_CHAR_MUL:
        tokens[tokenCount].raw.op.priority = CALC_PRIO_MUL;
        break;
      case CALC_CHAR_DIV:
        tokens[tokenCount].raw.op.priority = CALC_PRIO_DIV;
        break;
      case CALC_CHAR_EXP:
        tokens[tokenCount].raw.op.priority = CALC_PRIO_EXP;
        tokens[tokenCount].raw.op.ltr = false;
        break;
      case CALC_CHAR_SIN:
      case CALC_CHAR_COS:
      case CALC_CHAR_TAN:
      case CALC_CHAR_ASN:
      case CALC_CHAR_ACS:
      case CALC_CHAR_ATN:
      case CALC_CHAR_LGE:
      case CALC_CHAR_LOG:
      case CALC_CHAR_SQT:
        break;
      case CALC_CHAR_EUL:
        tokens[tokenCount].isNum = true;
        tokens[tokenCount].raw.num = CALC_VALU_EUL;
        dashAsMinus = true;
        break;
      case CALC_CHAR_PI:
        tokens[tokenCount].isNum = true;
        tokens[tokenCount].raw.num = CALC_VALU_PI;
        dashAsMinus = true;
        break;
      case '\0':
        tokenCount--;
        inputLocation = CALC_BUFFER_SIZE;
        break;
      default:
        tokenCount--;
        break;
    }
    tokenCount++;
    inputLocation++;
  }

  struct Token output[CALC_BUFFER_SIZE + 1]; // Final output tokens before evaluation
  struct Token opstack[CALC_BUFFER_SIZE + 1]; // Stack of operators
  unsigned char outputLocation = 0, opstackLocation = 0; // Keep track of indices

  unsigned char numBrackets = 0; // The number of parenthesis

  for(unsigned char i = 0; i < tokenCount; i++)
  {
    if(tokens[i].isNum)
    {
      output[outputLocation] = tokens[i];
      outputLocation++;
    }
    else if(tokens[i].raw.op.c == CALC_CHAR_BEG)
    {
      opstack[opstackLocation] = tokens[i];
      opstackLocation++;
    }
    else if(tokens[i].raw.op.c == CALC_CHAR_END)
    {
      while(opstack[opstackLocation - 1].raw.op.c != CALC_CHAR_BEG)
      {
        output[outputLocation] = opstack[opstackLocation - 1];
        outputLocation++;
        opstackLocation--;
      }
      opstackLocation--;

      numBrackets += 2;
    }
    else if(tokens[i].raw.op.priority == 0)
    {
      opstack[opstackLocation] = tokens[i];
      opstackLocation++;
    }
    else
    {
      while(opstackLocation != 0
        && (opstack[opstackLocation - 1].raw.op.priority == 0
          || tokens[i].raw.op.priority < opstack[opstackLocation - 1].raw.op.priority
          || (tokens[i].raw.op.priority == opstack[opstackLocation - 1].raw.op.priority && opstack[opstackLocation - 1].raw.op.ltr))
        && opstack[opstackLocation - 1].raw.op.c != CALC_CHAR_BEG)
      {
        output[outputLocation] = opstack[opstackLocation - 1];
        outputLocation++;
        opstackLocation--;
      }
      opstack[opstackLocation] = tokens[i];
      opstackLocation++;
    }
  }

  tokenCount -= numBrackets;

  for(signed char i = opstackLocation - 1; i >= 0; i--)
  {
    output[outputLocation] = opstack[i];
    outputLocation++;
    opstackLocation--;
  }

  double answer[CALC_BUFFER_SIZE];
  unsigned char answerLocation = 0;

  for(unsigned char i = 0; i < tokenCount; i++)
  {
    if(output[i].isNum)
    {
      answer[answerLocation] = output[i].raw.num;
      answerLocation++;
      continue;
    }

    if(output[i].raw.op.priority == 0)
    {
      if (answerLocation < 1) { /* not handled here -- ERROR? */ } else
      if(answerLocation >= 1)
      {
        double (*op)(double);
        switch(output[i].raw.op.c)
        {
        case CALC_CHAR_SIN:
          op = sin;
          break;
        case CALC_CHAR_COS:
          op = cos;
          break;
        case CALC_CHAR_TAN:
          op = tan;
          break;
        case CALC_CHAR_ASN:
          op = asin;
          break;
        case CALC_CHAR_ACS:
          op = acos;
          break;
        case CALC_CHAR_ATN:
          op = atan;
          break;
        case CALC_CHAR_LGE:
          op = log;
          break;
        case CALC_CHAR_LOG:
          op = log10;
          break;
        case CALC_CHAR_SQT:
          op = sqrt;
          break;
        default:
          continue; /* invalid input */
        }
        answer[answerLocation - 1] = op(answer[answerLocation - 1]);
      }
    }
    /* priority != 0 */
    else if(answerLocation >= 2)
    {
      switch(output[i].raw.op.c)
      {
      case CALC_CHAR_ADD:
        answer[answerLocation - 2] += answer[answerLocation - 1];
        break;
      case CALC_CHAR_SUB:
        answer[answerLocation - 2] -= answer[answerLocation - 1];
        break;
      case CALC_CHAR_MUL:
        answer[answerLocation - 2] *= answer[answerLocation - 1];
        break;
      case CALC_CHAR_DIV:
        answer[answerLocation - 2] /= answer[answerLocation - 1];
        break;
      case CALC_CHAR_EXP:
        answer[answerLocation - 2] = pow(answer[answerLocation - 2], answer[answerLocation - 1]);
        break;
      }

      answerLocation--;
    }
  }

  return answer[0];
}

/*
 * @returns  0 when nothing should happen and QMK should work as usual
 * @returns -1 when invalid input was given, QMK should ignore it
 * @returns -2 when BSP should be done
 * @returns -3 when CALC should be done
 * @returns -4 when ENDCALC should be done
 * @returns positive value of CALC_* when normal input was processed
 */
static int process_input(const uint16_t keycode, const uint8_t mods, const keyevent_t event)
{
  /* handle even when no key was pressed */
  if(!event.pressed)
  {
    switch(keycode)
    {
      /* QMK should handle those */
      case KC_RSFT:
      case KC_LSFT:
        return 0;
        break;
    }
    /* ??? ignore */
    return -1;
  }

  /* when shift key is pressed handle characters differently */
  char characterPressed;
  if((get_mods() & MODS_SHIFT_MASK))
  {
    switch(keycode)
    {
      case KC_9:
        characterPressed = CALC_CHAR_BEG;
        break;
      case KC_0:
        characterPressed = CALC_CHAR_END;
        break;
      case KC_EQUAL:
        characterPressed = CALC_CHAR_ADD;
        break;
      case KC_KP_PLUS:
        characterPressed = CALC_CHAR_ADD;
        break;
      case KC_6:
        characterPressed = CALC_CHAR_EXP;
        break;
      case KC_8:
        characterPressed = CALC_CHAR_MUL;
        break;
      case KC_KP_ASTERISK:
        characterPressed = CALC_CHAR_MUL;
        break;
      case KC_S:
        characterPressed = CALC_CHAR_ASN;
        break;
      case KC_C:
        characterPressed = CALC_CHAR_ACS;
        break;
      case KC_T:
        characterPressed = CALC_CHAR_ATN;
        break;
      case KC_L:
        characterPressed = CALC_CHAR_LOG;
        break;
      default:
        return -1;
        break;
    }
    return characterPressed;
  }

  /* normal key handling:  shift not pressed */

  /* digits */
  if (keycode == KC_KP_0 || keycode == KC_0) {
    return '0';
  } else if (keycode >= KC_KP_1 && keycode <= KC_KP_9) {
    return keycode - KC_KP_1 +1 + '0';
  } else if (keycode >= KC_1 && keycode <= KC_9) {
    return keycode - KC_1 +1 + '0';
  }

  /* other tokens */
  switch (keycode) {
    case KC_MINUS:
    case KC_KP_MINUS:
      return characterPressed = CALC_CHAR_SUB;
    case KC_SLASH:
    case KC_KP_SLASH:
      return characterPressed = CALC_CHAR_DIV;
    case KC_S:
      return characterPressed = CALC_CHAR_SIN;
    case KC_C:
      return characterPressed = CALC_CHAR_COS;
    case KC_T:
      return characterPressed = CALC_CHAR_TAN;
    case KC_Q:
      return characterPressed = CALC_CHAR_SQT;
    case KC_L:
      return characterPressed = CALC_CHAR_LGE;
    case KC_DOT:
    case KC_KP_DOT:
      return characterPressed = CALC_CHAR_DEC;
    case KC_P:
      return characterPressed = CALC_CHAR_PI;
    case KC_E:
      return characterPressed = CALC_CHAR_EUL;
    case KC_BSPC:
      return -2;
    case KC_RSFT:
      return 0;
    case KC_LSFT:
      return 0;
    case CALC:
      return -3;
    case ENDCALC:
      return -4;
    default:
      return -1;
  }
}

bool process_record_user(uint16_t keycode, keyrecord_t* record)
{
	static char text[CALC_BUFFER_SIZE + 1]; // Used to store input and then output when ready to print
	static char backspaceText[CALC_BUFFER_SIZE + 1]; // Pretty dumb waste of memory because only backspace characters, used with send_string to backspace and remove input

	if((get_highest_layer(layer_state) == CALC_LAYER && CALC_FORCE_NUM_LOCK_INSIDE_CALC) || (get_highest_layer(layer_state) != CALC_LAYER && CALC_FORCE_NUM_LOCK_OUTSIDE_CALC))
	{
		bool numpadKeyPressed = record->event.pressed &&
			!(get_mods() & MODS_SHIFT_MASK) &&
			/* KC_KP_1, KC_KP_2, ..., KC_KP_0, KC_KP_DOT */
			(keycode >= KC_KP_1 && keycode <= KC_KP_DOT);

		if(numpadKeyPressed && !(host_keyboard_leds() & (1 << USB_LED_NUM_LOCK)))
		{
			add_key(KC_NLCK);
			send_keyboard_report();
			del_key(KC_NLCK);
		}
	}

	if(get_highest_layer(layer_state) != CALC_LAYER) { return true; }

	int action = process_input(keycode, get_mods(), record->event);
	switch(action)
	{
	case 0:
		return true;
	case -1:
		return false;
	case -2:
		if(inputLocation > 0)
		{
			inputLocation--;
			text[inputLocation] = '\0';
			backspaceText[0] = (char)8;
			backspaceText[1] = '\0';
			send_string(backspaceText);
		}
		return false;
	case -3:
		for(int i = 0; i < inputLocation; i++)
		{
			backspaceText[i] = (char)8;
		}
		send_string(backspaceText);
		dtostrf(calc(text), CALC_PRINT_SIZE, CALC_PRINT_SIZE, text);
		send_string(text);
		for(unsigned char i = 0; i < CALC_BUFFER_SIZE; i++)
		{
			text[i] = '\0';
			backspaceText[i] = '\0';
		}
		inputLocation = 0;
		return false;
	case -4:
		for(unsigned char i = 0; i < CALC_BUFFER_SIZE; i++)
		{
			text[i] = '\0';
			backspaceText[i] = '\0';
		}
		inputLocation = 0;
		layer_off(CALC_LAYER);
		return false;
	default:
		break;
	}
	char characterPressed = (char)action;

	if(inputLocation < CALC_BUFFER_SIZE)
	{
		text[inputLocation] = characterPressed;
		inputLocation++;

		char characterToSend[2];
		characterToSend[0] = characterPressed;
		characterToSend[1] = '\0';

		send_string(characterToSend);
	}
	return false;
}