27 |
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#include "calcomp.h" |
28 |
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|
29 |
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#define MAXLINE 256 /* maximum line length */ |
30 |
– |
#define MAXWORD 64 /* maximum word length */ |
30 |
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|
31 |
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#define newnode() (EPNODE *)ecalloc(1, sizeof(EPNODE)) |
32 |
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|
34 |
– |
#define isid(c) (isalnum(c) || (c) == '_' || (c) == '.') |
35 |
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|
33 |
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
34 |
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|
35 |
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extern double atof(), pow(); |
36 |
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extern char *fgets(), *savestr(); |
37 |
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extern char *emalloc(), *ecalloc(); |
38 |
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extern EPNODE *curfunc; |
39 |
< |
extern double efunc(), evariable(), enumber(), euminus(), echannel(); |
40 |
< |
extern double eargument(), eadd(), esubtr(), emult(), edivi(), epow(); |
41 |
< |
extern double ebotch(); |
39 |
> |
extern double efunc(), evariable(); |
40 |
> |
static double euminus(), echannel(), eargument(), enumber(); |
41 |
> |
static double eadd(), esubtr(), emult(), edivi(), epow(); |
42 |
> |
static double ebotch(); |
43 |
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extern int errno; |
44 |
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|
45 |
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int nextc; /* lookahead character */ |
75 |
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esubtr, |
76 |
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0, |
77 |
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edivi, |
78 |
< |
0,0,0,0,0,0,0,0,0,0,0,0,0, |
78 |
> |
0,0,0,0,0,0,0,0,0,0, |
79 |
|
ebotch, |
80 |
+ |
0,0, |
81 |
+ |
ebotch, |
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
84 |
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epow, |
85 |
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}; |
86 |
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|
87 |
– |
static char *infile; /* input file name */ |
87 |
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static FILE *infp; /* input file pointer */ |
88 |
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static char *linbuf; /* line buffer */ |
89 |
+ |
static char *infile; /* input file name */ |
90 |
+ |
static int lineno; /* input line number */ |
91 |
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static int linepos; /* position in buffer */ |
92 |
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|
93 |
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|
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{ |
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EPNODE *ep; |
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|
100 |
< |
initstr(NULL, expr); |
100 |
> |
initstr(expr, NULL, 0); |
101 |
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#if defined(VARIABLE) && defined(FUNCTION) |
102 |
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curfunc = NULL; |
103 |
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#endif |
129 |
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|
130 |
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switch (epar->type) { |
131 |
|
|
132 |
+ |
#if defined(VARIABLE) || defined(FUNCTION) |
133 |
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case VAR: |
134 |
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varfree(epar->v.ln); |
135 |
|
break; |
136 |
+ |
#endif |
137 |
|
|
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case SYM: |
139 |
|
freestr(epar->v.name); |
292 |
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} |
293 |
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|
294 |
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|
295 |
< |
initfile(file, fp) /* prepare input file */ |
293 |
< |
char *file; |
295 |
> |
initfile(fp, fn, ln) /* prepare input file */ |
296 |
|
FILE *fp; |
297 |
+ |
char *fn; |
298 |
+ |
int ln; |
299 |
|
{ |
300 |
|
static char inpbuf[MAXLINE]; |
301 |
|
|
298 |
– |
infile = file; |
302 |
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infp = fp; |
303 |
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linbuf = inpbuf; |
304 |
+ |
infile = fn; |
305 |
+ |
lineno = ln; |
306 |
|
linepos = 0; |
307 |
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inpbuf[0] = '\0'; |
308 |
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scan(); |
309 |
|
} |
310 |
|
|
311 |
|
|
312 |
< |
initstr(file, s) /* prepare input string */ |
308 |
< |
char *file; |
312 |
> |
initstr(s, fn, ln) /* prepare input string */ |
313 |
|
char *s; |
314 |
+ |
char *fn; |
315 |
+ |
int ln; |
316 |
|
{ |
311 |
– |
infile = file; |
317 |
|
infp = NULL; |
318 |
+ |
infile = fn; |
319 |
+ |
lineno = ln; |
320 |
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linbuf = s; |
321 |
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linepos = 0; |
322 |
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scan(); |
323 |
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} |
324 |
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|
325 |
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|
326 |
< |
scan() /* scan next character */ |
326 |
> |
int |
327 |
> |
scan() /* scan next character, return literal next */ |
328 |
|
{ |
329 |
+ |
register int lnext = 0; |
330 |
+ |
|
331 |
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do { |
332 |
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if (linbuf[linepos] == '\0') |
333 |
|
if (infp == NULL || fgets(linbuf, MAXLINE, infp) == NULL) |
334 |
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nextc = EOF; |
335 |
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else { |
336 |
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nextc = linbuf[0]; |
337 |
+ |
lineno++; |
338 |
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linepos = 1; |
339 |
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} |
340 |
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else |
341 |
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nextc = linbuf[linepos++]; |
342 |
+ |
if (!lnext) |
343 |
+ |
lnext = nextc; |
344 |
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if (nextc == '{') { |
345 |
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scan(); |
346 |
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while (nextc != '}') |
351 |
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scan(); |
352 |
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} |
353 |
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} while (isspace(nextc)); |
354 |
+ |
return(lnext); |
355 |
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} |
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|
357 |
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|
358 |
+ |
char * |
359 |
+ |
ltoa(l) /* convert long to ascii */ |
360 |
+ |
long l; |
361 |
+ |
{ |
362 |
+ |
static char buf[16]; |
363 |
+ |
register char *cp; |
364 |
+ |
int neg = 0; |
365 |
+ |
|
366 |
+ |
if (l == 0) |
367 |
+ |
return("0"); |
368 |
+ |
if (l < 0) { |
369 |
+ |
l = -l; |
370 |
+ |
neg++; |
371 |
+ |
} |
372 |
+ |
cp = buf + sizeof(buf); |
373 |
+ |
*--cp = '\0'; |
374 |
+ |
while (l) { |
375 |
+ |
*--cp = l % 10 + '0'; |
376 |
+ |
l /= 10; |
377 |
+ |
} |
378 |
+ |
if (neg) |
379 |
+ |
*--cp = '-'; |
380 |
+ |
return(cp); |
381 |
+ |
} |
382 |
+ |
|
383 |
+ |
|
384 |
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syntax(err) /* report syntax error and quit */ |
385 |
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char *err; |
386 |
|
{ |
387 |
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register int i; |
388 |
|
|
389 |
+ |
if (infile != NULL || lineno != 0) { |
390 |
+ |
if (infile != NULL) eputs(infile); |
391 |
+ |
if (lineno != 0) { |
392 |
+ |
eputs(infile != NULL ? ", line " : "line "); |
393 |
+ |
eputs(ltoa((long)lineno)); |
394 |
+ |
} |
395 |
+ |
eputs(": syntax error:\n"); |
396 |
+ |
} |
397 |
|
eputs(linbuf); |
398 |
< |
if (linbuf[0] == '\0' || linbuf[strlen(linbuf)-1] != '\n') |
398 |
> |
if (linbuf[strlen(linbuf)-1] != '\n') |
399 |
|
eputs("\n"); |
400 |
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for (i = 0; i < linepos-1; i++) |
401 |
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eputs(linbuf[i] == '\t' ? "\t" : " "); |
402 |
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eputs("^ "); |
355 |
– |
if (infile != NULL) { |
356 |
– |
eputs(infile); |
357 |
– |
eputs(": "); |
358 |
– |
} |
403 |
|
eputs(err); |
404 |
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eputs("\n"); |
405 |
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quit(1); |
425 |
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getname() /* scan an identifier */ |
426 |
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{ |
427 |
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static char str[MAXWORD+1]; |
428 |
< |
register int i; |
428 |
> |
register int i, lnext; |
429 |
|
|
430 |
< |
for (i = 0; i < MAXWORD && isid(nextc); i++, scan()) |
431 |
< |
str[i] = nextc; |
430 |
> |
lnext = nextc; |
431 |
> |
for (i = 0; i < MAXWORD && isid(lnext); i++, lnext = scan()) |
432 |
> |
str[i] = lnext; |
433 |
|
str[i] = '\0'; |
434 |
|
|
435 |
|
return(str); |
439 |
|
int |
440 |
|
getinum() /* scan a positive integer */ |
441 |
|
{ |
442 |
< |
register int n; |
442 |
> |
register int n, lnext; |
443 |
|
|
444 |
|
n = 0; |
445 |
< |
while (isdigit(nextc)) { |
446 |
< |
n = n * 10 + nextc - '0'; |
447 |
< |
scan(); |
445 |
> |
lnext = nextc; |
446 |
> |
while (isdigit(lnext)) { |
447 |
> |
n = n * 10 + lnext - '0'; |
448 |
> |
lnext = scan(); |
449 |
|
} |
450 |
|
return(n); |
451 |
|
} |
454 |
|
double |
455 |
|
getnum() /* scan a positive float */ |
456 |
|
{ |
457 |
< |
register int i; |
457 |
> |
register int i, lnext; |
458 |
|
char str[MAXWORD+1]; |
459 |
|
|
460 |
|
i = 0; |
461 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
462 |
< |
str[i++] = nextc; |
463 |
< |
scan(); |
461 |
> |
lnext = nextc; |
462 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
463 |
> |
str[i++] = lnext; |
464 |
> |
lnext = scan(); |
465 |
|
} |
466 |
< |
if (nextc == '.' && i < MAXWORD) { |
467 |
< |
str[i++] = nextc; |
468 |
< |
scan(); |
469 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
470 |
< |
str[i++] = nextc; |
471 |
< |
scan(); |
466 |
> |
if (lnext == '.' && i < MAXWORD) { |
467 |
> |
str[i++] = lnext; |
468 |
> |
lnext = scan(); |
469 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
470 |
> |
str[i++] = lnext; |
471 |
> |
lnext = scan(); |
472 |
|
} |
473 |
|
} |
474 |
< |
if ((nextc == 'e' || nextc == 'E') && i < MAXWORD) { |
475 |
< |
str[i++] = nextc; |
476 |
< |
scan(); |
477 |
< |
if ((nextc == '-' || nextc == '+') && i < MAXWORD) { |
478 |
< |
str[i++] = nextc; |
479 |
< |
scan(); |
474 |
> |
if ((lnext == 'e' || lnext == 'E') && i < MAXWORD) { |
475 |
> |
str[i++] = lnext; |
476 |
> |
lnext = scan(); |
477 |
> |
if ((lnext == '-' || lnext == '+') && i < MAXWORD) { |
478 |
> |
str[i++] = lnext; |
479 |
> |
lnext = scan(); |
480 |
|
} |
481 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
482 |
< |
str[i++] = nextc; |
483 |
< |
scan(); |
481 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
482 |
> |
str[i++] = lnext; |
483 |
> |
lnext = scan(); |
484 |
|
} |
485 |
|
} |
486 |
|
str[i] = '\0'; |
536 |
|
|
537 |
|
|
538 |
|
EPNODE * |
539 |
< |
getE3() /* E3 -> E3 ^ E4 */ |
539 |
> |
getE3() /* E3 -> E4 ^ E3 */ |
540 |
|
/* E4 */ |
541 |
|
{ |
542 |
|
register EPNODE *ep1, *ep2; |
543 |
|
|
544 |
|
ep1 = getE4(); |
545 |
< |
while (nextc == '^') { |
545 |
> |
if (nextc == '^') { |
546 |
|
ep2 = newnode(); |
547 |
|
ep2->type = nextc; |
548 |
|
scan(); |
549 |
|
addekid(ep2, ep1); |
550 |
< |
addekid(ep2, getE4()); |
550 |
> |
addekid(ep2, getE3()); |
551 |
|
#ifdef RCONST |
552 |
|
if (ep1->type == NUM && ep1->sibling->type == NUM) |
553 |
|
ep2 = rconst(ep2); |
554 |
|
#endif |
555 |
< |
ep1 = ep2; |
555 |
> |
return(ep2); |
556 |
|
} |
557 |
|
return(ep1); |
558 |
|
} |
562 |
|
getE4() /* E4 -> ADDOP E5 */ |
563 |
|
/* E5 */ |
564 |
|
{ |
565 |
< |
register EPNODE *ep1; |
565 |
> |
register EPNODE *ep1, *ep2; |
566 |
|
|
567 |
|
if (nextc == '-') { |
568 |
|
scan(); |
569 |
< |
ep1 = newnode(); |
570 |
< |
#ifndef RCONST |
571 |
< |
if (isdecimal(nextc)) { |
572 |
< |
ep1->type = NUM; |
526 |
< |
ep1->v.num = -getnum(); |
527 |
< |
return(ep1); |
569 |
> |
ep2 = getE5(); |
570 |
> |
if (ep2->type == NUM) { |
571 |
> |
ep2->v.num = -ep2->v.num; |
572 |
> |
return(ep2); |
573 |
|
} |
574 |
< |
#endif |
574 |
> |
ep1 = newnode(); |
575 |
|
ep1->type = UMINUS; |
576 |
< |
addekid(ep1, getE5()); |
532 |
< |
#ifdef RCONST |
533 |
< |
if (ep1->v.kid->type == NUM) |
534 |
< |
ep1 = rconst(ep1); |
535 |
< |
#endif |
576 |
> |
addekid(ep1, ep2); |
577 |
|
return(ep1); |
578 |
|
} |
579 |
|
if (nextc == '+') |
649 |
|
syntax("'(' expected"); |
650 |
|
#endif |
651 |
|
#endif |
652 |
+ |
#ifdef RCONST |
653 |
+ |
if (isconstvar(ep1)) |
654 |
+ |
ep1 = rconst(ep1); |
655 |
+ |
#endif |
656 |
|
return(ep1); |
657 |
|
} |
658 |
|
#endif |
684 |
|
|
685 |
|
return(ep); |
686 |
|
} |
687 |
+ |
|
688 |
+ |
|
689 |
+ |
isconstvar(ep) /* is ep linked to a constant expression? */ |
690 |
+ |
register EPNODE *ep; |
691 |
+ |
{ |
692 |
+ |
#ifdef VARIABLE |
693 |
+ |
register EPNODE *ep1; |
694 |
+ |
#ifdef FUNCTION |
695 |
+ |
|
696 |
+ |
if (ep->type == FUNC) { |
697 |
+ |
if (!isconstfun(ep->v.kid)) |
698 |
+ |
return(0); |
699 |
+ |
for (ep1 = ep->v.kid->sibling; ep1 != NULL; ep1 = ep1->sibling) |
700 |
+ |
if (ep1->type != NUM && !isconstfun(ep1)) |
701 |
+ |
return(0); |
702 |
+ |
return(1); |
703 |
+ |
} |
704 |
+ |
#endif |
705 |
+ |
if (ep->type != VAR) |
706 |
+ |
return(0); |
707 |
+ |
ep1 = ep->v.ln->def; |
708 |
+ |
if (ep1 == NULL || ep1->type != ':') |
709 |
+ |
return(0); |
710 |
+ |
#ifdef FUNCTION |
711 |
+ |
if (ep1->v.kid->type != SYM) |
712 |
+ |
return(0); |
713 |
+ |
#endif |
714 |
+ |
return(1); |
715 |
+ |
#else |
716 |
+ |
return(ep->type == FUNC); |
717 |
+ |
#endif |
718 |
+ |
} |
719 |
+ |
|
720 |
+ |
|
721 |
+ |
#if defined(FUNCTION) && defined(VARIABLE) |
722 |
+ |
isconstfun(ep) /* is ep linked to a constant function? */ |
723 |
+ |
register EPNODE *ep; |
724 |
+ |
{ |
725 |
+ |
register EPNODE *dp; |
726 |
+ |
register LIBR *lp; |
727 |
+ |
|
728 |
+ |
if (ep->type != VAR) |
729 |
+ |
return(0); |
730 |
+ |
dp = ep->v.ln->def; |
731 |
+ |
if (dp != NULL && dp->type != ':') |
732 |
+ |
return(0); |
733 |
+ |
if ((dp == NULL || dp->v.kid->type != FUNC) |
734 |
+ |
&& ((lp = liblookup(ep->v.ln->name)) == NULL |
735 |
+ |
|| lp->atyp != ':')) |
736 |
+ |
return(0); |
737 |
+ |
return(1); |
738 |
+ |
} |
739 |
+ |
#endif |
740 |
|
#endif |