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[/] [open8_urisc/] [trunk/] [Open8 Tools/] [open8_src/] [open8_as/] [stack.c] - Blame information for rev 286

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1 178 jshamlet 
#include <ctype.h>
2 
#include <stdio.h>
3 
#include <stdlib.h>
4 
#include <string.h>
5 
 
6 
#include "defines.h"
7 
 
8 
#include "parse.h"
9 
#include "pass_1.h"
10 
#include "stack.h"
11 
#include "include_file.h"
12 
 
13 
 
14 
extern int input_number_error_msg, bankheader_status, input_float_mode;
15 
extern int i, size, d, macro_active, string_size, section_status, parse_floats;
16 
extern char xyz[256], *buffer, tmp[4096], expanded_macro_string[256], label[MAX_NAME_LENGTH];
17 
extern struct definition *defines, *tmp_def, *next_def;
18 
extern struct active_file_info *active_file_info_first, *active_file_info_last, *active_file_info_tmp;
19 
extern struct macro_runtime *macro_runtime_current;
20 
extern struct section_def *sec_tmp;
21 
extern double flo;
22 
 
23 
int latest_stack = 0, stacks_inside = 0, stacks_outside = 0, stack_id = 0;
24 
struct stack *stacks_first = NULL, *stacks_tmp = NULL, *stacks_last = NULL;
25 
struct stack *stacks_header_first = NULL, *stacks_header_last = NULL;
26 
 
27 
extern int stack_inserted;
28 
 
29 
extern int operand_hint;
30 
 
31 
static int _stack_insert(void) {
32 
 
33 
  /* outside bankheader sections */
34 
  if (bankheader_status == OFF) {
35 
    if (stacks_first == NULL) {
36 
      stacks_first = stacks_tmp;
37 
      stacks_last = stacks_tmp;
38 
    }
39 
    else {
40 
      stacks_last->next = stacks_tmp;
41 
      stacks_last = stacks_tmp;
42 
    }
43 
    stacks_outside++;
44 
 
45 
    stack_inserted = STACK_OUTSIDE;
46 
  }
47 
  /* inside a bankheader section */
48 
  else {
49 
    if (stacks_header_first == NULL) {
50 
      stacks_header_first = stacks_tmp;
51 
      stacks_header_last = stacks_tmp;
52 
    }
53 
    else {
54 
      stacks_header_last->next = stacks_tmp;
55 
      stacks_header_last = stacks_tmp;
56 
    }
57 
    stacks_inside++;
58 
 
59 
    stack_inserted = STACK_INSIDE;
60 
  }
61 
 
62 
  stacks_tmp->id = stack_id;
63 
  stacks_tmp->section_status = section_status;
64 
  if (section_status == ON)
65 
    stacks_tmp->section_id = sec_tmp->id;
66 
  else
67 
    stacks_tmp->section_id = 0;
68 
 
69 
  latest_stack = stack_id;
70 
  stack_id++;
71 
 
72 
  return SUCCEEDED;
73 
}
74 
 
75 
 
76 
int stack_calculate(char *in, int *value) {
77 
 
78 
  int q = 0, b = 0, d, k, op[256], n, o, l;
79 
  struct stack_item si[256], ta[256];
80 
  struct stack s;
81 
  unsigned char e;
82 
  double dou, dom;
83 
 
84 
 
85 
  /* slice the data into infix format */
86 
  while (*in != 0x0A) {
87 
    /* init the stack item */
88 
    si[q].type = 0x123456;
89 
    si[q].sign = 0x123456;
90 
    si[q].value = 0x123456;
91 
    si[q].string[0] = 0;
92 
 
93 
    if (*in == ' ') {
94 
      in++;
95 
      continue;
96 
    }
97 
    else if (*in == '-') {
98 
      if (*(in + 1) == '-') {
99 
        si[q].type = STACK_ITEM_TYPE_STRING;
100 
        si[q].sign = SI_SIGN_POSITIVE;
101 
        for (k = 0; *in == '-' && k < 32; k++, in++) {
102 
          si[q].string[k] = '-';
103 
        }
104 
        si[q].string[k] = 0;
105 
      }
106 
      else {
107 
        si[q].type = STACK_ITEM_TYPE_OPERATOR;
108 
        si[q].value = SI_OP_MINUS;
109 
        in++;
110 
      }
111 
      q++;
112 
    }
113 
    else if (*in == '+') {
114 
      if (*(in + 1) == '+') {
115 
        si[q].type = STACK_ITEM_TYPE_STRING;
116 
        si[q].sign = SI_SIGN_POSITIVE;
117 
        for (k = 0; *in == '+' && k < 32; k++, in++)
118 
          si[q].string[k] = '+';
119 
        si[q].string[k] = 0;
120 
      }
121 
      else {
122 
        si[q].type = STACK_ITEM_TYPE_OPERATOR;
123 
        si[q].value = SI_OP_PLUS;
124 
        in++;
125 
      }
126 
      q++;
127 
    }
128 
    else if (*in == '*') {
129 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
130 
      si[q].value = SI_OP_MULTIPLY;
131 
      q++;
132 
      in++;
133 
    }
134 
    else if (*in == '/') {
135 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
136 
      si[q].value = SI_OP_DIVIDE;
137 
      q++;
138 
      in++;
139 
    }
140 
    else if (*in == '|') {
141 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
142 
      si[q].value = SI_OP_OR;
143 
      q++;
144 
      in++;
145 
    }
146 
    else if (*in == '&') {
147 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
148 
      si[q].value = SI_OP_AND;
149 
      q++;
150 
      in++;
151 
    }
152 
    else if (*in == '^') {
153 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
154 
      si[q].value = SI_OP_POWER;
155 
      q++;
156 
      in++;
157 
    }
158 
    else if (*in == '#') {
159 
      if (q == 0) {
160 
        if (input_number_error_msg == YES)
161 
          print_error("Syntax error. Invalid use of modulo.\n", ERROR_STC);
162 
        return FAILED;
163 
      }
164 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
165 
      si[q].value = SI_OP_MODULO;
166 
      q++;
167 
      in++;
168 
    }
169 
    else if (*in == '<' && *(in + 1) == '<') {
170 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
171 
      si[q].value = SI_OP_SHIFT_LEFT;
172 
      q++;
173 
      in += 2;
174 
    }
175 
    else if (*in == '<') {
176 
      /* should we end parsing here? */
177 
      if (b == 0 && q > 0) {
178 
        if ((si[q-1].type == STACK_ITEM_TYPE_OPERATOR && si[q-1].value == SI_OP_RIGHT) ||
179 
            si[q-1].type == STACK_ITEM_TYPE_VALUE || si[q-1].type == STACK_ITEM_TYPE_STRING)
180 
          break;
181 
      }
182 
 
183 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
184 
      si[q].value = SI_OP_LOW_BYTE;
185 
      q++;
186 
      in++;
187 
    }
188 
    else if (*in == '>' && *(in + 1) == '>') {
189 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
190 
      si[q].value = SI_OP_SHIFT_RIGHT;
191 
      q++;
192 
      in += 2;
193 
    }
194 
    else if (*in == '>') {
195 
      /* should we end parsing here? */
196 
      if (b == 0 && q > 0) {
197 
        if ((si[q-1].type == STACK_ITEM_TYPE_OPERATOR && si[q-1].value == SI_OP_RIGHT) ||
198 
            si[q-1].type == STACK_ITEM_TYPE_VALUE || si[q-1].type == STACK_ITEM_TYPE_STRING)
199 
          break;
200 
      }
201 
 
202 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
203 
      si[q].value = SI_OP_HIGH_BYTE;
204 
      q++;
205 
      in++;
206 
    }
207 
    else if (*in == '~') {
208 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
209 
      si[q].value = SI_OP_XOR;
210 
      q++;
211 
      in++;
212 
    }
213 
    else if (*in == '=' && *(in + 1) == '=')
214 
      break;
215 
    else if (*in == '!' && *(in + 1) == '=')
216 
      break;
217 
    else if (*in == '(') {
218 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
219 
      si[q].value = SI_OP_LEFT;
220 
      q++;
221 
      b++;
222 
      in++;
223 
    }
224 
    else if (*in == '.') {
225 
      in++;
226 
      d = operand_hint;
227 
      if (*in == 'b' || *in == 'B') {
228 
        operand_hint = HINT_8BIT;
229 
        in++;
230 
      }
231 
      else if (*in == 'w' || *in == 'W') {
232 
        operand_hint = HINT_16BIT;
233 
        in++;
234 
      }
235 
      else
236 
        break;
237 
 
238 
      if (d != HINT_NONE && d != operand_hint) {
239 
        print_error("Confusing operand hint!\n", ERROR_STC);
240 
        in++;
241 
      }
242 
    }
243 
    else if (*in == ')') {
244 
      si[q].type = STACK_ITEM_TYPE_OPERATOR;
245 
      si[q].value = SI_OP_RIGHT;
246 
      /* end of expression? */
247 
      if (b == 0)
248 
        break;
249 
      b--;
250 
      q++;
251 
      in++;
252 
    }
253 
    else if (*in == ',')
254 
      break;
255 
    else if (*in == ']')
256 
      break;
257 
    else if (*in == '%') {
258 
      d = 0;
259 
      for (k = 0; k < 31; k++, d = d<<1) {
260 
        in++;
261 
        e = *in;
262 
        if (e == '0' || e == '1')
263 
          d += e - '0';
264 
        else if (e == ' ' || e == ')' || e == '|' || e == '&' || e == '+' || e == '-' || e == '*' ||
265 
                 e == '/' || e == ',' || e == '^' || e == '<' || e == '>' || e == '#' || e == '~' ||
266 
                 e == ']' || e == '.' || e == 0x0A)
267 
          break;
268 
        else {
269 
          if (input_number_error_msg == YES) {
270 
            sprintf(xyz, "Got '%c' (%d) when expected (0/1).\n", e, e);
271 
            print_error(xyz, ERROR_NUM);
272 
          }
273 
          return FAILED;
274 
        }
275 
      }
276 
 
277 
      d = d>>1;
278 
 
279 
      si[q].type = STACK_ITEM_TYPE_VALUE;
280 
      si[q].value = d;
281 
      si[q].sign = SI_SIGN_POSITIVE;
282 
      q++;
283 
    }
284 
    else if (*in == '\'') {
285 
      in++;
286 
      d = *in;
287 
      in++;
288 
      if (*in != '\'') {
289 
        sprintf(xyz, "Got '%c' (%d) when expected \"'\".\n", *in, *in);
290 
        print_error(xyz, ERROR_NUM);
291 
        return FAILED;
292 
      }
293 
      in++;
294 
 
295 
      si[q].type = STACK_ITEM_TYPE_VALUE;
296 
      si[q].value = d;
297 
      si[q].sign = SI_SIGN_POSITIVE;
298 
      q++;
299 
    }
300 
    else if (*in == '$') {
301 
      d = 0;
302 
      for (k = 0; k < 8; k++, d = d << 4) {
303 
        in++;
304 
        e = *in;
305 
        if (e >= '0' && e <= '9')
306 
          d += e - '0';
307 
        else if (e >= 'A' && e <= 'F')
308 
          d += e - 'A' + 10;
309 
        else if (e >= 'a' && e <= 'f')
310 
          d += e - 'a' + 10;
311 
        else if (e == ' ' || e == ')' || e == '|' || e == '&' || e == '+' || e == '-' ||
312 
                 e == '*' || e == '/' || e == ',' || e == '^' || e == '<' || e == '>' ||
313 
                 e == '#' || e == '~' || e == ']' || e == '.' || e == 0x0A)
314 
          break;
315 
        else {
316 
          if (input_number_error_msg == YES) {
317 
            sprintf(xyz, "Got '%c' (%d) when expected (0-F).\n", e, e);
318 
            print_error(xyz, ERROR_NUM);
319 
          }
320 
          return FAILED;
321 
        }
322 
      }
323 
 
324 
      d = d >> 4;
325 
 
326 
      si[q].type = STACK_ITEM_TYPE_VALUE;
327 
      si[q].value = d;
328 
      si[q].sign = SI_SIGN_POSITIVE;
329 
      q++;
330 
    }
331 
    else if (*in >= '0' && *in <= '9') {
332 
      /* is it a hexadecimal value after all? */
333 
      n = 0;
334 
      for (k = 0; k < 9; k++) {
335 
        if (in[k] >= '0' && in[k] <= '9')
336 
          continue;
337 
        if (in[k] >= 'a' && in[k] <= 'f') {
338 
          n = 1;
339 
          break;
340 
        }
341 
        if (in[k] >= 'A' && in[k] <= 'F') {
342 
          n = 1;
343 
          break;
344 
        }
345 
        if (in[k] == 'h' || in[k] == 'H') {
346 
          n = 1;
347 
          break;
348 
        }
349 
        break;
350 
      }
351 
 
352 
      if (n == 1) {
353 
        /* it's hex */
354 
        d = 0;
355 
        for (k = 0; k < 8; k++, d = d << 4) {
356 
          e = *(in++);
357 
          if (e >= '0' && e <= '9')
358 
            d += e - '0';
359 
          else if (e >= 'A' && e <= 'F')
360 
            d += e - 'A' + 10;
361 
          else if (e >= 'a' && e <= 'f')
362 
            d += e - 'a' + 10;
363 
          else if (e == ' ' || e == ')' || e == '|' || e == '&' || e == '+' || e == '-' ||
364 
                   e == '*' || e == '/' || e == ',' || e == '^' || e == '<' || e == '>' ||
365 
                   e == '#' || e == '~' || e == ']' || e == '.' || e == 'h' || e == 'H' || e == 0x0A)
366 
            break;
367 
          else {
368 
            if (input_number_error_msg == YES) {
369 
              sprintf(xyz, "Got '%c' (%d) when expected (0-F).\n", e, e);
370 
              print_error(xyz, ERROR_NUM);
371 
            }
372 
            return FAILED;
373 
          }
374 
        }
375 
 
376 
        d = d >> 4;
377 
 
378 
        si[q].type = STACK_ITEM_TYPE_VALUE;
379 
        si[q].value = d;
380 
        si[q].sign = SI_SIGN_POSITIVE;
381 
        q++;
382 
      }
383 
      else {
384 
        /* it's decimal */
385 
        dou = (*in - '0')*10.0;
386 
        dom = 1.0;
387 
        n = 0;
388 
        for (k = 0; k < 9; k++) {
389 
          in++;
390 
          e = *in;
391 
          if (e >= '0' && e <= '9') {
392 
            if (n == 0) {
393 
              dou += e - '0';
394 
              dou *= 10.0;
395 
            }
396 
            else if (n == 1) {
397 
              dou += dom*(e - '0');
398 
              dom /= 10.0;
399 
            }
400 
          }
401 
          else if (e == ' ' || e == ')' || e == '|' || e == '&' || e == '+' || e == '-' || e == '*' ||
402 
                   e == '/' || e == ',' || e == '^' || e == '<' || e == '>' || e == '#' || e == '~' ||
403 
                   e == ']' || e == 0x0A)
404 
            break;
405 
          else if (e == '.') {
406 
            if (*(in+1) == 'b' || *(in+1) == 'B' || *(in+1) == 'w' || *(in+1) == 'W')
407 
              break;
408 
            if (parse_floats == NO)
409 
              break;
410 
            if (n == 1) {
411 
              if (input_number_error_msg == YES)
412 
                print_error("Syntax error.\n", ERROR_NUM);
413 
              return FAILED;
414 
            }
415 
            n = 1;
416 
          }
417 
          else {
418 
            if (input_number_error_msg == YES) {
419 
              sprintf(xyz, "Got '%c' (%d) when expected (0-9).\n", e, e);
420 
              print_error(xyz, ERROR_NUM);
421 
            }
422 
            return FAILED;
423 
          }
424 
        }
425 
 
426 
        dou /= 10;
427 
 
428 
        si[q].type = STACK_ITEM_TYPE_VALUE;
429 
        si[q].value = dou;
430 
        si[q].sign = SI_SIGN_POSITIVE;
431 
        q++;
432 
      }
433 
    }
434 
    else {
435 
      /* it must be a string! */
436 
      si[q].sign = SI_SIGN_POSITIVE;
437 
      for (k = 0; k < 63; k++) {
438 
        e = *in;
439 
        if (e == ' ' || e == ')' || e == '|' || e == '&' || e == '+' || e == '-' || e == '*' ||
440 
            e == '/' || e == ',' || e == '^' || e == '<' || e == '>' || e == '#' || e == ']' ||
441 
            e == '~' || e == 0xA)
442 
          break;
443 
        if (e == '.' && (*(in+1) == 'b' || *(in+1) == 'B' || *(in+1) == 'w' || *(in+1) == 'W' || *(in+1) == 'l' || *(in+1) == 'L') &&
444 
            (*(in+2) == ' ' || *(in+2) == ')' || *(in+2) == '|' || *(in+2) == '&' || *(in+2) == '+' || *(in+2) == '-' || *(in+2) == '*' ||
445 
             *(in+2) == '/' || *(in+2) == ',' || *(in+2) == '^' || *(in+2) == '<' || *(in+2) == '>' || *(in+2) == '#' || *(in+2) == ']' ||
446 
             *(in+2) == '~' || *(in+2) == 0xA))
447 
          break;
448 
        si[q].string[k] = e;
449 
        in++;
450 
      }
451 
      si[q].string[k] = 0;
452 
 
453 
      si[q].type = STACK_ITEM_TYPE_STRING;
454 
      q++;
455 
    }
456 
 
457 
    if (q == 255) {
458 
      print_error("Out of stack space.\n", ERROR_STC);
459 
      return FAILED;
460 
    }
461 
  }
462 
 
463 
  if (b != 0) {
464 
    print_error("Unbalanced parentheses.\n", ERROR_STC);
465 
    return FAILED;
466 
  }
467 
 
468 
  /* only one item found -> let the item parser handle it */
469 
  if (q == 1)
470 
    return STACK_CALCULATE_DELAY;
471 
 
472 
  /* check if there was data before the computation */
473 
  if (q > 1 && (si[0].type == STACK_ITEM_TYPE_STRING || si[0].type == STACK_ITEM_TYPE_VALUE)) {
474 
    if (si[1].type == STACK_ITEM_TYPE_STRING || si[1].type == STACK_ITEM_TYPE_VALUE)
475 
      return STACK_CALCULATE_DELAY;
476 
    if (si[1].type == STACK_ITEM_TYPE_OPERATOR) {
477 
      if (si[1].value == SI_OP_LEFT)
478 
        return STACK_CALCULATE_DELAY;
479 
    }
480 
  }
481 
 
482 
  /* check if the computation is of the form "+-..." and remove that leading "+" */
483 
  if (q > 2 && si[0].type == STACK_ITEM_TYPE_OPERATOR && si[0].value == SI_OP_PLUS &&
484 
      si[1].type == STACK_ITEM_TYPE_OPERATOR && si[1].value == SI_OP_MINUS) {
485 
    si[0].type = STACK_ITEM_TYPE_DELETED;
486 
  }
487 
 
488 
  /* update the source pointer */
489 
  i = in - buffer;
490 
 
491 
  /* fix the sign in every operand */
492 
  for (b = 1, k = 0; k < q; k++) {
493 
    if ((q - k) != 1 && si[k].type == STACK_ITEM_TYPE_OPERATOR && si[k + 1].type == STACK_ITEM_TYPE_OPERATOR) {
494 
      if (si[k].value != SI_OP_LEFT && si[k].value != SI_OP_RIGHT && si[k + 1].value != SI_OP_LEFT && si[k + 1].value != SI_OP_RIGHT) {
495 
        print_error("Error in computation syntax.\n", ERROR_STC);
496 
        return FAILED;
497 
      }
498 
    }
499 
    if (si[k].type == STACK_ITEM_TYPE_OPERATOR && si[k].value == SI_OP_MINUS && b == 1) {
500 
      if (si[k + 1].type == STACK_ITEM_TYPE_VALUE || si[k + 1].type == STACK_ITEM_TYPE_STRING) {
501 
        if (si[k + 1].sign == SI_SIGN_POSITIVE)
502 
          si[k + 1].sign = SI_SIGN_NEGATIVE;
503 
        else
504 
          si[k + 1].sign = SI_SIGN_POSITIVE;
505 
        /* it wasn't a minus operator, it was a sign */
506 
        si[k].type = STACK_ITEM_TYPE_DELETED;
507 
      }
508 
      else if (si[k + 1].type == STACK_ITEM_TYPE_OPERATOR && si[k + 1].value == SI_OP_LEFT) {
509 
        o = 1;
510 
        l = k + 2;
511 
        while (o > 0 && l < q) {
512 
          if (si[l].type == STACK_ITEM_TYPE_VALUE || si[l].type == STACK_ITEM_TYPE_STRING) {
513 
            if (si[l].sign == SI_SIGN_POSITIVE)
514 
              si[l].sign = SI_SIGN_NEGATIVE;
515 
            else
516 
              si[l].sign = SI_SIGN_POSITIVE;
517 
          }
518 
          else if (si[l].type == STACK_ITEM_TYPE_OPERATOR) {
519 
            if (si[l].value == SI_OP_LEFT)
520 
              o++;
521 
            else if (si[l].value == SI_OP_RIGHT)
522 
              o--;
523 
          }
524 
          l++;
525 
        }
526 
 
527 
        if (o != 0) {
528 
          print_error("Unbalanced parentheses.\n", ERROR_STC);
529 
          return FAILED;
530 
        }
531 
 
532 
        si[k].type = STACK_ITEM_TYPE_DELETED;
533 
      }
534 
    }
535 
    /* remove unnecessary + */
536 
    if (si[k].type == STACK_ITEM_TYPE_OPERATOR && si[k].value == SI_OP_PLUS && b == 1) {
537 
      if (si[k + 1].type == STACK_ITEM_TYPE_VALUE || si[k + 1].type == STACK_ITEM_TYPE_STRING)
538 
        si[k].type = STACK_ITEM_TYPE_DELETED;
539 
      else if (si[k + 1].type == STACK_ITEM_TYPE_OPERATOR && si[k + 1].value == SI_OP_LEFT)
540 
        si[k].type = STACK_ITEM_TYPE_DELETED;
541 
    }
542 
    else if (si[k].type == STACK_ITEM_TYPE_VALUE || si[k].type == STACK_ITEM_TYPE_STRING)
543 
      b = 0;
544 
    else if (si[k].type == STACK_ITEM_TYPE_OPERATOR && si[k].value == SI_OP_LEFT)
545 
      b = 1;
546 
  }
547 
 
548 
  /* convert infix stack into postfix stack */
549 
  for (b = 0, k = 0, d = 0; k < q; k++) {
550 
    /* operands pass through */
551 
    if (si[k].type == STACK_ITEM_TYPE_VALUE) {
552 
      ta[d].type = si[k].type;
553 
      ta[d].value = si[k].value;
554 
      ta[d].sign = si[k].sign;
555 
      d++;
556 
    }
557 
    else if (si[k].type == STACK_ITEM_TYPE_STRING) {
558 
      ta[d].type = si[k].type;
559 
      strcpy(ta[d].string, si[k].string);
560 
      ta[d].sign = si[k].sign;
561 
      d++;
562 
    }
563 
    /* operators get inspected */
564 
    else if (si[k].type == STACK_ITEM_TYPE_OPERATOR) {
565 
      if (b == 0) {
566 
        op[0] = si[k].value;
567 
        b++;
568 
      }
569 
      else {
570 
        if (si[k].value == SI_OP_PLUS) {
571 
          b--;
572 
          while (b != -1 && op[b] != SI_OP_LEFT) {
573 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
574 
            ta[d].value = op[b];
575 
            b--;
576 
            d++;
577 
          }
578 
          b++;
579 
          op[b] = SI_OP_PLUS;
580 
          b++;
581 
        }
582 
        else if (si[k].value == SI_OP_MINUS) {
583 
          b--;
584 
          while (b != -1 && op[b] != SI_OP_LEFT) {
585 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
586 
            ta[d].value = op[b];
587 
            b--;
588 
            d++;
589 
          }
590 
          b++;
591 
          op[b] = SI_OP_MINUS;
592 
          b++;
593 
        }
594 
        else if (si[k].value == SI_OP_LOW_BYTE) {
595 
          b--;
596 
          while (b != -1 && op[b] != SI_OP_LEFT) {
597 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
598 
            ta[d].value = op[b];
599 
            b--;
600 
            d++;
601 
          }
602 
          b++;
603 
          op[b] = SI_OP_LOW_BYTE;
604 
          b++;
605 
        }
606 
        else if (si[k].value == SI_OP_HIGH_BYTE) {
607 
          b--;
608 
          while (b != -1 && op[b] != SI_OP_LEFT) {
609 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
610 
            ta[d].value = op[b];
611 
            b--;
612 
            d++;
613 
          }
614 
          b++;
615 
          op[b] = SI_OP_HIGH_BYTE;
616 
          b++;
617 
        }
618 
        else if (si[k].value == SI_OP_XOR) {
619 
          b--;
620 
          while (b != -1 && op[b] != SI_OP_LEFT) {
621 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
622 
            ta[d].value = op[b];
623 
            b--;
624 
            d++;
625 
          }
626 
          b++;
627 
          op[b] = SI_OP_XOR;
628 
          b++;
629 
        }
630 
        else if (si[k].value == SI_OP_MULTIPLY) {
631 
          b--;
632 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
633 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
634 
            ta[d].value = op[b];
635 
            b--;
636 
            d++;
637 
          }
638 
          b++;
639 
          op[b] = SI_OP_MULTIPLY;
640 
          b++;
641 
        }
642 
        else if (si[k].value == SI_OP_DIVIDE) {
643 
          b--;
644 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
645 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
646 
            ta[d].value = op[b];
647 
            b--;
648 
            d++;
649 
          }
650 
          b++;
651 
          op[b] = SI_OP_DIVIDE;
652 
          b++;
653 
        }
654 
        else if (si[k].value == SI_OP_MODULO) {
655 
          b--;
656 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
657 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
658 
            ta[d].value = op[b];
659 
            b--;
660 
            d++;
661 
          }
662 
          b++;
663 
          op[b] = SI_OP_MODULO;
664 
          b++;
665 
        }
666 
        else if (si[k].value == SI_OP_POWER) {
667 
          b--;
668 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
669 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
670 
            ta[d].value = op[b];
671 
            b--;
672 
            d++;
673 
          }
674 
          b++;
675 
          op[b] = SI_OP_POWER;
676 
          b++;
677 
        }
678 
        else if (si[k].value == SI_OP_SHIFT_LEFT) {
679 
          b--;
680 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
681 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
682 
            ta[d].value = op[b];
683 
            b--;
684 
            d++;
685 
          }
686 
          b++;
687 
          op[b] = SI_OP_SHIFT_LEFT;
688 
          b++;
689 
        }
690 
        else if (si[k].value == SI_OP_SHIFT_RIGHT) {
691 
          b--;
692 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
693 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
694 
            ta[d].value = op[b];
695 
            b--;
696 
            d++;
697 
          }
698 
          b++;
699 
          op[b] = SI_OP_SHIFT_RIGHT;
700 
          b++;
701 
        }
702 
        else if (si[k].value == SI_OP_AND) {
703 
          b--;
704 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
705 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
706 
            ta[d].value = op[b];
707 
            b--;
708 
            d++;
709 
          }
710 
          b++;
711 
          op[b] = SI_OP_AND;
712 
          b++;
713 
        }
714 
        else if (si[k].value == SI_OP_OR) {
715 
          b--;
716 
          while (b != -1 && op[b] != SI_OP_LEFT && op[b] != SI_OP_PLUS && op[b] != SI_OP_MINUS) {
717 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
718 
            ta[d].value = op[b];
719 
            b--;
720 
            d++;
721 
          }
722 
          b++;
723 
          op[b] = SI_OP_OR;
724 
          b++;
725 
        }
726 
        else if (si[k].value == SI_OP_LEFT) {
727 
          op[b] = SI_OP_LEFT;
728 
          b++;
729 
        }
730 
        else if (si[k].value == SI_OP_RIGHT) {
731 
          b--;
732 
          while (op[b] != SI_OP_LEFT) {
733 
            ta[d].type = STACK_ITEM_TYPE_OPERATOR;
734 
            ta[d].value = op[b];
735 
            b--;
736 
            d++;
737 
          }
738 
        }
739 
      }
740 
    }
741 
  }
742 
 
743 
  /* empty the operator stack */
744 
  while (b > 0) {
745 
    b--;
746 
    ta[d].type = STACK_ITEM_TYPE_OPERATOR;
747 
    ta[d].value = op[b];
748 
    d++;
749 
  }
750 
 
751 
  /* DEBUG output
752 
  printf("STACK ID %d LINE %d\n", stack_id, active_file_info_last->line_current);
753 
  for (k = 0; k < d; k++) {
754 
    char ar[] = "+-*()|&/^«»%~<>";
755 
 
756 
    if (ta[k].type == STACK_ITEM_TYPE_OPERATOR)
757 
      printf("%c ", ar[((int)ta[k].value)]);
758 
    else if (ta[k].type == STACK_ITEM_TYPE_VALUE)
759 
      printf("V(%f) ", ta[k].value);
760 
    else
761 
      printf("S(%s) ", ta[k].string);
762 
  }
763 
  printf("\n");
764 
  */
765 
 
766 
  /* are all the symbols known? */
767 
  if (resolve_stack(ta, d) == SUCCEEDED) {
768 
    s.stack = ta;
769 
    s.linenumber = active_file_info_last->line_current;
770 
    s.filename_id = active_file_info_last->filename_id;
771 
 
772 
    if (compute_stack(&s, d, &dou) == FAILED)
773 
      return FAILED;
774 
 
775 
    if (input_float_mode == ON) {
776 
      flo = dou;
777 
      return INPUT_NUMBER_FLOAT;
778 
    }
779 
 
780 
    *value = (int)dou;
781 
 
782 
    return SUCCEEDED;
783 
  }
784 
 
785 
  /* only one string? */
786 
  if (d == 1 && ta[0].type == STACK_ITEM_TYPE_STRING) {
787 
    strcpy(label, ta[0].string);
788 
    return STACK_RETURN_LABEL;
789 
  }
790 
 
791 
  /* we have a stack full of computation and we save it for wlalink */
792 
  stacks_tmp = malloc(sizeof(struct stack));
793 
  if (stacks_tmp == NULL) {
794 
    print_error("Out of memory error while allocating room for a new stack.\n", ERROR_STC);
795 
    return FAILED;
796 
  }
797 
  stacks_tmp->next = NULL;
798 
  stacks_tmp->type = STACKS_TYPE_UNKNOWN;
799 
  stacks_tmp->bank = -123456;
800 
  stacks_tmp->stacksize = d;
801 
  stacks_tmp->stack = malloc(sizeof(struct stack_item) * d);
802 
  if (stacks_tmp->stack == NULL) {
803 
    free(stacks_tmp);
804 
    print_error("Out of memory error while allocating room for a new stack.\n", ERROR_STC);
805 
    return FAILED;
806 
  }
807 
 
808 
  stacks_tmp->linenumber = active_file_info_last->line_current;
809 
  stacks_tmp->filename_id = active_file_info_last->filename_id;
810 
 
811 
  /* all stacks will be definition stacks by default. pass_4 will mark
812 
     those that are referenced to be STACK_POSITION_CODE stacks */
813 
  stacks_tmp->position = STACK_POSITION_DEFINITION;
814 
 
815 
  for (q = 0; q < d; q++) {
816 
    if (ta[q].type == STACK_ITEM_TYPE_OPERATOR) {
817 
      stacks_tmp->stack[q].type = STACK_ITEM_TYPE_OPERATOR;
818 
      stacks_tmp->stack[q].value = ta[q].value;
819 
    }
820 
    else if (ta[q].type == STACK_ITEM_TYPE_VALUE) {
821 
      stacks_tmp->stack[q].type = STACK_ITEM_TYPE_VALUE;
822 
      stacks_tmp->stack[q].value = ta[q].value;
823 
      stacks_tmp->stack[q].sign = ta[q].sign;
824 
    }
825 
    else if (ta[q].type == STACK_ITEM_TYPE_STACK) {
826 
      stacks_tmp->stack[q].type = STACK_ITEM_TYPE_STACK;
827 
      stacks_tmp->stack[q].value = ta[q].value;
828 
      stacks_tmp->stack[q].sign = ta[q].sign;
829 
    }
830 
    else {
831 
      stacks_tmp->stack[q].type = STACK_ITEM_TYPE_STRING;
832 
      stacks_tmp->stack[q].sign = ta[q].sign;
833 
      strcpy(stacks_tmp->stack[q].string, ta[q].string);
834 
    }
835 
  }
836 
 
837 
  _stack_insert();
838 
 
839 
  return INPUT_NUMBER_STACK;
840 
}
841 
 
842 
 
843 
int resolve_stack(struct stack_item s[], int x) {
844 
 
845 
  struct macro_argument *ma;
846 
  struct stack_item *st;
847 
  int a, b, k, q = x;
848 
  char c;
849 
 
850 
 
851 
  st = s;
852 
  while (x > 0) {
853 
    if (s->type == STACK_ITEM_TYPE_STRING) {
854 
      if (macro_active != 0 && s->string[0] == '\\') {
855 
        if (s->string[1] == '@' && s->string[2] == 0) {
856 
          s->type = STACK_ITEM_TYPE_VALUE;
857 
          s->value = macro_runtime_current->macro->calls - 1;
858 
        }
859 
        else {
860 
          for (a = 0, b = 0; s->string[a + 1] != 0 && a < 10; a++) {
861 
            c = s->string[a + 1];
862 
            if (c < '0' && c > '9') {
863 
              print_error("Error in MACRO argument number definition.\n", ERROR_DIR);
864 
              return FAILED;
865 
            }
866 
            b = (b * 10) + (c - '0');
867 
          }
868 
 
869 
          if (b > macro_runtime_current->supplied_arguments) {
870 
            sprintf(xyz, "Reference to MACRO argument number %d is out of range.\n", b);
871 
            print_error(xyz, ERROR_STC);
872 
            return FAILED;
873 
          }
874 
 
875 
          /* return the macro argument */
876 
          ma = macro_runtime_current->argument_data[b - 1];
877 
          k = ma->type;
878 
 
879 
          if (k == INPUT_NUMBER_ADDRESS_LABEL)
880 
            strcpy(label, ma->string);
881 
          else if (k == INPUT_NUMBER_STRING) {
882 
            strcpy(label, ma->string);
883 
            string_size = strlen(ma->string);
884 
          }
885 
          else if (k == INPUT_NUMBER_STACK)
886 
            latest_stack = ma->value;
887 
          else if (k == SUCCEEDED)
888 
            d = ma->value;
889 
 
890 
          if (!(k == SUCCEEDED || k == INPUT_NUMBER_ADDRESS_LABEL || k == INPUT_NUMBER_STACK))
891 
            return FAILED;
892 
 
893 
          if (k == SUCCEEDED) {
894 
            s->type = STACK_ITEM_TYPE_VALUE;
895 
            s->value = d;
896 
          }
897 
          else if (k == INPUT_NUMBER_STACK) {
898 
            s->type = STACK_ITEM_TYPE_STACK;
899 
            s->value = latest_stack;
900 
          }
901 
          else
902 
            strcpy(s->string, label);
903 
        }
904 
      }
905 
      else {
906 
        if (macro_active != 0) {
907 
          /* expand e.g., \1 and \@ */
908 
          d = 0;
909 
          if (expand_macro_arguments(s->string, &d) == FAILED)
910 
            return FAILED;
911 
          strcpy(s->string, expanded_macro_string);
912 
        }
913 
 
914 
        tmp_def = defines;
915 
        while (tmp_def != NULL) {
916 
          if (strcmp(tmp_def->alias, s->string) == 0) {
917 
            if (tmp_def->type == DEFINITION_TYPE_STRING) {
918 
              sprintf(xyz, "Definition \"%s\" is a string definition.\n", tmp_def->alias);
919 
              print_error(xyz, ERROR_STC);
920 
              return FAILED;
921 
            }
922 
            else if (tmp_def->type == DEFINITION_TYPE_STACK) {
923 
              /* skip stack definitions -> use its name instead */
924 
            }
925 
            else {
926 
              s->type = STACK_ITEM_TYPE_VALUE;
927 
              s->value = tmp_def->value;
928 
              break;
929 
            }
930 
          }
931 
          tmp_def = tmp_def->next;
932 
        }
933 
      }
934 
    }
935 
    s++;
936 
    x--;
937 
  }
938 
 
939 
  /* find a string or a stack and fail */
940 
  while (q > 0) {
941 
    if (st->type == STACK_ITEM_TYPE_STRING || st->type == STACK_ITEM_TYPE_STACK)
942 
      return FAILED;
943 
    q--;
944 
    st++;
945 
  }
946 
 
947 
  return SUCCEEDED;
948 
}
949 
 
950 
 
951 
int compute_stack(struct stack *sta, int x, double *result) {
952 
 
953 
  struct stack_item *s;
954 
  double v[256], q;
955 
  int r, t, z;
956 
 
957 
 
958 
  s = sta->stack;
959 
  for (r = 0, t = 0; r < x; r++, s++) {
960 
    if (s->type == STACK_ITEM_TYPE_VALUE) {
961 
      if (s->sign == SI_SIGN_NEGATIVE)
962 
        v[t] = -s->value;
963 
      else
964 
        v[t] = s->value;
965 
      t++;
966 
    }
967 
    else {
968 
      switch ((int)s->value) {
969 
      case SI_OP_PLUS:
970 
        v[t - 2] += v[t - 1];
971 
        t--;
972 
        break;
973 
      case SI_OP_MINUS:
974 
        v[t - 2] -= v[t - 1];
975 
        t--;
976 
        break;
977 
      case SI_OP_MULTIPLY:
978 
        v[t - 2] *= v[t - 1];
979 
        t--;
980 
        break;
981 
      case SI_OP_LOW_BYTE:
982 
        z = (int)v[t - 1];
983 
        v[t - 1] = z & 0xFF;
984 
        break;
985 
      case SI_OP_HIGH_BYTE:
986 
        z = (int)v[t - 1];
987 
        v[t - 1] = (z>>8) & 0xFF;
988 
        break;
989 
      case SI_OP_XOR:
990 
        /* 16bit XOR? */
991 
        if (v[t - 2] > 0xFF || v[t - 2] < -128 || v[t - 1] > 0xFF || v[t - 1] < -128)
992 
          v[t - 2] = ((int)v[t - 1] ^ (int)v[t - 2]) & 0xFFFF;
993 
        /* 8bit XOR */
994 
        else
995 
          v[t - 2] = ((int)v[t - 1] ^ (int)v[t - 2]) & 0xFF;
996 
        t--;
997 
        break;
998 
      case SI_OP_OR:
999 
        v[t - 2] = (int)v[t - 1] | (int)v[t - 2];
1000 
        t--;
1001 
        break;
1002 
      case SI_OP_AND:
1003 
        v[t - 2] = (int)v[t - 1] & (int)v[t - 2];
1004 
        t--;
1005 
        break;
1006 
      case SI_OP_MODULO:
1007 
        if (((int)v[t - 1]) == 0) {
1008 
          fprintf(stderr, "%s:%d: COMPUTE_STACK: Modulo by zero.\n", get_file_name(sta->filename_id), sta->linenumber);
1009 
          return FAILED;
1010 
        }
1011 
        v[t - 2] = (int)v[t - 2] % (int)v[t - 1];
1012 
        t--;
1013 
        break;
1014 
      case SI_OP_DIVIDE:
1015 
        if (((int)v[t - 1]) == 0) {
1016 
          fprintf(stderr, "%s:%d: COMPUTE_STACK: Division by zero.\n", get_file_name(sta->filename_id), sta->linenumber);
1017 
          return FAILED;
1018 
        }
1019 
        v[t - 2] /= v[t - 1];
1020 
        t--;
1021 
        break;
1022 
      case SI_OP_POWER:
1023 
        q = 1;
1024 
        for (z = 0; z < v[t - 1]; z++)
1025 
          q *= v[t - 2];
1026 
        v[t - 2] = q;
1027 
        t--;
1028 
        break;
1029 
      case SI_OP_SHIFT_LEFT:
1030 
        v[t - 2] = (int)v[t - 2] << (int)v[t - 1];
1031 
        t--;
1032 
        break;
1033 
      case SI_OP_SHIFT_RIGHT:
1034 
        v[t - 2] = (int)v[t - 2] >> (int)v[t - 1];
1035 
        t--;
1036 
        break;
1037 
      }
1038 
    }
1039 
  }
1040 
 
1041 
  if (v[0] < -32768 || v[0] > 65536) {
1042 
    print_error("Out of 16bit range.\n", ERROR_STC);
1043 
    return FAILED;
1044 
  }
1045 
 
1046 
  *result = v[0];
1047 
 
1048 
  return SUCCEEDED;
1049 
}
1050 
 
1051 
 
1052 
int stack_create_label_stack(char *label) {
1053 
 
1054 
  if (label == NULL)
1055 
    return FAILED;
1056 
 
1057 
  /* we need to create a stack that holds just one label */
1058 
  stacks_tmp = malloc(sizeof(struct stack));
1059 
  if (stacks_tmp == NULL) {
1060 
    print_error("Out of memory error while allocating room for a new stack.\n", ERROR_STC);
1061 
    return FAILED;
1062 
  }
1063 
  stacks_tmp->next = NULL;
1064 
  stacks_tmp->type = STACKS_TYPE_UNKNOWN;
1065 
  stacks_tmp->bank = -123456;
1066 
  stacks_tmp->stacksize = 1;
1067 
  stacks_tmp->stack = malloc(sizeof(struct stack_item) * 1);
1068 
  if (stacks_tmp->stack == NULL) {
1069 
    free(stacks_tmp);
1070 
    print_error("Out of memory error while allocating room for a new stack.\n", ERROR_STC);
1071 
    return FAILED;
1072 
  }
1073 
 
1074 
  stacks_tmp->linenumber = active_file_info_last->line_current;
1075 
  stacks_tmp->filename_id = active_file_info_last->filename_id;
1076 
 
1077 
  /* all stacks will be definition stacks by default. pass_4 will mark
1078 
     those that are referenced to be STACK_POSITION_CODE stacks */
1079 
  stacks_tmp->position = STACK_POSITION_DEFINITION;
1080 
 
1081 
  stacks_tmp->stack[0].type = STACK_ITEM_TYPE_STRING;
1082 
  stacks_tmp->stack[0].sign = SI_SIGN_POSITIVE;
1083 
  strcpy(stacks_tmp->stack[0].string, label);
1084 
 
1085 
  _stack_insert();
1086 
 
1087 
  return SUCCEEDED;
1088 
}

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