27 |
|
#include "calcomp.h" |
28 |
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|
29 |
|
#define MAXLINE 256 /* maximum line length */ |
30 |
– |
#define MAXWORD 64 /* maximum word length */ |
30 |
|
|
31 |
|
#define newnode() (EPNODE *)ecalloc(1, sizeof(EPNODE)) |
32 |
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|
34 |
– |
#define isid(c) (isalnum(c) || (c) == '_' || (c) == '.') |
35 |
– |
|
33 |
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
34 |
|
|
35 |
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extern double atof(), pow(); |
323 |
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} |
324 |
|
|
325 |
|
|
326 |
< |
scan() /* scan next character */ |
326 |
> |
int |
327 |
> |
scan() /* scan next character, return literal next */ |
328 |
|
{ |
329 |
+ |
register int lnext = 0; |
330 |
+ |
|
331 |
|
do { |
332 |
|
if (linbuf[linepos] == '\0') |
333 |
|
if (infp == NULL || fgets(linbuf, MAXLINE, infp) == NULL) |
339 |
|
} |
340 |
|
else |
341 |
|
nextc = linbuf[linepos++]; |
342 |
+ |
if (!lnext) |
343 |
+ |
lnext = nextc; |
344 |
|
if (nextc == '{') { |
345 |
|
scan(); |
346 |
|
while (nextc != '}') |
351 |
|
scan(); |
352 |
|
} |
353 |
|
} while (isspace(nextc)); |
354 |
+ |
return(lnext); |
355 |
|
} |
356 |
|
|
357 |
|
|
425 |
|
getname() /* scan an identifier */ |
426 |
|
{ |
427 |
|
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'; |
686 |
|
} |
687 |
|
|
688 |
|
|
689 |
< |
isconstvar(ep) /* is ep linked to a constant? */ |
689 |
> |
isconstvar(ep) /* is ep linked to a constant expression? */ |
690 |
|
register EPNODE *ep; |
691 |
|
{ |
692 |
|
#ifdef VARIABLE |
693 |
|
register EPNODE *ep1; |
688 |
– |
|
694 |
|
#ifdef FUNCTION |
695 |
+ |
|
696 |
|
if (ep->type == FUNC) { |
697 |
< |
if (ep->v.kid->type != VAR) |
698 |
< |
return(0); |
693 |
< |
ep1 = ep->v.kid->v.ln->def; |
694 |
< |
if (ep1 != NULL && ep1->type != ':') |
695 |
< |
return(0); |
696 |
< |
if ((ep1 == NULL || ep1->v.kid->type != FUNC) |
697 |
< |
&& liblookup(ep->v.kid->v.ln->name) == NULL) |
698 |
< |
return(0); |
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) |
700 |
> |
if (ep1->type != NUM && !isconstfun(ep1)) |
701 |
|
return(0); |
702 |
|
return(1); |
703 |
|
} |
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 |