39 |
|
extern char *fgets(), *savestr(); |
40 |
|
extern char *emalloc(), *ecalloc(); |
41 |
|
extern EPNODE *curfunc; |
42 |
< |
extern double efunc(), evariable(), enumber(), euminus(), echannel(); |
43 |
< |
extern double eargument(), eadd(), esubtr(), emult(), edivi(), epow(); |
44 |
< |
extern double ebotch(); |
42 |
> |
extern double efunc(), evariable(); |
43 |
> |
static double euminus(), echannel(), eargument(), enumber(); |
44 |
> |
static double eadd(), esubtr(), emult(), edivi(), epow(); |
45 |
> |
static double ebotch(); |
46 |
|
extern int errno; |
47 |
|
|
48 |
|
int nextc; /* lookahead character */ |
78 |
|
esubtr, |
79 |
|
0, |
80 |
|
edivi, |
81 |
< |
0,0,0,0,0,0,0,0,0,0,0,0,0, |
81 |
> |
0,0,0,0,0,0,0,0,0,0, |
82 |
|
ebotch, |
83 |
+ |
0,0, |
84 |
+ |
ebotch, |
85 |
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
86 |
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
87 |
|
epow, |
88 |
|
}; |
89 |
|
|
87 |
– |
static char *infile; /* input file name */ |
90 |
|
static FILE *infp; /* input file pointer */ |
91 |
|
static char *linbuf; /* line buffer */ |
92 |
+ |
static char *infile; /* input file name */ |
93 |
+ |
static int lineno; /* input line number */ |
94 |
|
static int linepos; /* position in buffer */ |
95 |
|
|
96 |
|
|
100 |
|
{ |
101 |
|
EPNODE *ep; |
102 |
|
|
103 |
< |
initstr(NULL, expr); |
103 |
> |
initstr(expr, NULL, 0); |
104 |
|
#if defined(VARIABLE) && defined(FUNCTION) |
105 |
|
curfunc = NULL; |
106 |
|
#endif |
132 |
|
|
133 |
|
switch (epar->type) { |
134 |
|
|
135 |
+ |
#if defined(VARIABLE) || defined(FUNCTION) |
136 |
|
case VAR: |
137 |
|
varfree(epar->v.ln); |
138 |
|
break; |
139 |
+ |
#endif |
140 |
|
|
141 |
|
case SYM: |
142 |
|
freestr(epar->v.name); |
295 |
|
} |
296 |
|
|
297 |
|
|
298 |
< |
initfile(file, fp) /* prepare input file */ |
293 |
< |
char *file; |
298 |
> |
initfile(fp, fn, ln) /* prepare input file */ |
299 |
|
FILE *fp; |
300 |
+ |
char *fn; |
301 |
+ |
int ln; |
302 |
|
{ |
303 |
|
static char inpbuf[MAXLINE]; |
304 |
|
|
298 |
– |
infile = file; |
305 |
|
infp = fp; |
306 |
|
linbuf = inpbuf; |
307 |
+ |
infile = fn; |
308 |
+ |
lineno = ln; |
309 |
|
linepos = 0; |
310 |
|
inpbuf[0] = '\0'; |
311 |
|
scan(); |
312 |
|
} |
313 |
|
|
314 |
|
|
315 |
< |
initstr(file, s) /* prepare input string */ |
308 |
< |
char *file; |
315 |
> |
initstr(s, fn, ln) /* prepare input string */ |
316 |
|
char *s; |
317 |
+ |
char *fn; |
318 |
+ |
int ln; |
319 |
|
{ |
311 |
– |
infile = file; |
320 |
|
infp = NULL; |
321 |
+ |
infile = fn; |
322 |
+ |
lineno = ln; |
323 |
|
linbuf = s; |
324 |
|
linepos = 0; |
325 |
|
scan(); |
334 |
|
nextc = EOF; |
335 |
|
else { |
336 |
|
nextc = linbuf[0]; |
337 |
+ |
lineno++; |
338 |
|
linepos = 1; |
339 |
|
} |
340 |
|
else |
352 |
|
} |
353 |
|
|
354 |
|
|
355 |
+ |
char * |
356 |
+ |
ltoa(l) /* convert long to ascii */ |
357 |
+ |
long l; |
358 |
+ |
{ |
359 |
+ |
static char buf[16]; |
360 |
+ |
register char *cp; |
361 |
+ |
int neg = 0; |
362 |
+ |
|
363 |
+ |
if (l == 0) |
364 |
+ |
return("0"); |
365 |
+ |
if (l < 0) { |
366 |
+ |
l = -l; |
367 |
+ |
neg++; |
368 |
+ |
} |
369 |
+ |
cp = buf + sizeof(buf); |
370 |
+ |
*--cp = '\0'; |
371 |
+ |
while (l) { |
372 |
+ |
*--cp = l % 10 + '0'; |
373 |
+ |
l /= 10; |
374 |
+ |
} |
375 |
+ |
if (neg) |
376 |
+ |
*--cp = '-'; |
377 |
+ |
return(cp); |
378 |
+ |
} |
379 |
+ |
|
380 |
+ |
|
381 |
|
syntax(err) /* report syntax error and quit */ |
382 |
|
char *err; |
383 |
|
{ |
384 |
|
register int i; |
385 |
|
|
386 |
+ |
if (infile != NULL || lineno != 0) { |
387 |
+ |
if (infile != NULL) eputs(infile); |
388 |
+ |
if (lineno != 0) { |
389 |
+ |
eputs(infile != NULL ? ", line " : "line "); |
390 |
+ |
eputs(ltoa((long)lineno)); |
391 |
+ |
} |
392 |
+ |
eputs(": syntax error:\n"); |
393 |
+ |
} |
394 |
|
eputs(linbuf); |
395 |
< |
if (linbuf[0] == '\0' || linbuf[strlen(linbuf)-1] != '\n') |
395 |
> |
if (linbuf[strlen(linbuf)-1] != '\n') |
396 |
|
eputs("\n"); |
397 |
|
for (i = 0; i < linepos-1; i++) |
398 |
|
eputs(linbuf[i] == '\t' ? "\t" : " "); |
399 |
|
eputs("^ "); |
355 |
– |
if (infile != NULL) { |
356 |
– |
eputs(infile); |
357 |
– |
eputs(": "); |
358 |
– |
} |
400 |
|
eputs(err); |
401 |
|
eputs("\n"); |
402 |
|
quit(1); |
530 |
|
|
531 |
|
|
532 |
|
EPNODE * |
533 |
< |
getE3() /* E3 -> E3 ^ E4 */ |
533 |
> |
getE3() /* E3 -> E4 ^ E3 */ |
534 |
|
/* E4 */ |
535 |
|
{ |
536 |
|
register EPNODE *ep1, *ep2; |
537 |
|
|
538 |
|
ep1 = getE4(); |
539 |
< |
while (nextc == '^') { |
539 |
> |
if (nextc == '^') { |
540 |
|
ep2 = newnode(); |
541 |
|
ep2->type = nextc; |
542 |
|
scan(); |
543 |
|
addekid(ep2, ep1); |
544 |
< |
addekid(ep2, getE4()); |
544 |
> |
addekid(ep2, getE3()); |
545 |
|
#ifdef RCONST |
546 |
|
if (ep1->type == NUM && ep1->sibling->type == NUM) |
547 |
|
ep2 = rconst(ep2); |
548 |
|
#endif |
549 |
< |
ep1 = ep2; |
549 |
> |
return(ep2); |
550 |
|
} |
551 |
|
return(ep1); |
552 |
|
} |
556 |
|
getE4() /* E4 -> ADDOP E5 */ |
557 |
|
/* E5 */ |
558 |
|
{ |
559 |
< |
register EPNODE *ep1; |
559 |
> |
register EPNODE *ep1, *ep2; |
560 |
|
|
561 |
|
if (nextc == '-') { |
562 |
|
scan(); |
563 |
< |
ep1 = newnode(); |
564 |
< |
#ifndef RCONST |
565 |
< |
if (isdecimal(nextc)) { |
566 |
< |
ep1->type = NUM; |
526 |
< |
ep1->v.num = -getnum(); |
527 |
< |
return(ep1); |
563 |
> |
ep2 = getE5(); |
564 |
> |
if (ep2->type == NUM) { |
565 |
> |
ep2->v.num = -ep2->v.num; |
566 |
> |
return(ep2); |
567 |
|
} |
568 |
< |
#endif |
568 |
> |
ep1 = newnode(); |
569 |
|
ep1->type = UMINUS; |
570 |
< |
addekid(ep1, getE5()); |
532 |
< |
#ifdef RCONST |
533 |
< |
if (ep1->v.kid->type == NUM) |
534 |
< |
ep1 = rconst(ep1); |
535 |
< |
#endif |
570 |
> |
addekid(ep1, ep2); |
571 |
|
return(ep1); |
572 |
|
} |
573 |
|
if (nextc == '+') |
643 |
|
syntax("'(' expected"); |
644 |
|
#endif |
645 |
|
#endif |
646 |
+ |
#ifdef RCONST |
647 |
+ |
if (isconstvar(ep1)) |
648 |
+ |
ep1 = rconst(ep1); |
649 |
+ |
#endif |
650 |
|
return(ep1); |
651 |
|
} |
652 |
|
#endif |
677 |
|
epfree(epar); |
678 |
|
|
679 |
|
return(ep); |
680 |
+ |
} |
681 |
+ |
|
682 |
+ |
|
683 |
+ |
isconstvar(ep) /* is ep linked to a constant? */ |
684 |
+ |
register EPNODE *ep; |
685 |
+ |
{ |
686 |
+ |
#ifdef VARIABLE |
687 |
+ |
register EPNODE *ep1; |
688 |
+ |
|
689 |
+ |
#ifdef FUNCTION |
690 |
+ |
if (ep->type == FUNC) { |
691 |
+ |
if (ep->v.kid->type != VAR) |
692 |
+ |
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); |
699 |
+ |
for (ep1 = ep->v.kid->sibling; ep1 != NULL; ep1 = ep1->sibling) |
700 |
+ |
if (ep1->type != NUM) |
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 |
|
#endif |