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/* Copyright (c) 1986 Regents of the University of California */ |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#include "calcomp.h" |
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|
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#define MAXLINE 256 /* maximum line length */ |
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#define MAXWORD 64 /* maximum word length */ |
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|
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#define newnode() (EPNODE *)ecalloc(1, sizeof(EPNODE)) |
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|
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#define isid(c) (isalnum(c) || (c) == '_' || (c) == '.') |
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|
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
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|
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extern double atof(), pow(); |
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#ifndef atof |
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extern double atof(); |
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#endif |
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extern double pow(); |
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extern char *fgets(), *savestr(); |
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extern char *emalloc(), *ecalloc(); |
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extern EPNODE *curfunc; |
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extern double efunc(), evariable(), enumber(), euminus(), echannel(); |
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extern double eargument(), eadd(), esubtr(), emult(), edivi(), epow(); |
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extern double ebotch(); |
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extern double efunc(), evariable(); |
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static double euminus(), echannel(), eargument(), enumber(); |
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static double eadd(), esubtr(), emult(), edivi(), epow(); |
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static double ebotch(); |
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extern int errno; |
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|
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int nextc; /* lookahead character */ |
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esubtr, |
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0, |
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edivi, |
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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, |
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ebotch, |
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0,0, |
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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, |
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epow, |
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}; |
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|
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static char *infile; /* input file name */ |
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static FILE *infp; /* input file pointer */ |
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static char *linbuf; /* line buffer */ |
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static char *infile; /* input file name */ |
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static int lineno; /* input line number */ |
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static int linepos; /* position in buffer */ |
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|
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{ |
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EPNODE *ep; |
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|
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initstr(NULL, expr); |
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initstr(expr, NULL, 0); |
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#if defined(VARIABLE) && defined(FUNCTION) |
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curfunc = NULL; |
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#endif |
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|
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switch (epar->type) { |
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|
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#if defined(VARIABLE) || defined(FUNCTION) |
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case VAR: |
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varfree(epar->v.ln); |
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break; |
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#endif |
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|
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case SYM: |
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freestr(epar->v.name); |
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} |
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initfile(file, fp) /* prepare input file */ |
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char *file; |
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initfile(fp, fn, ln) /* prepare input file */ |
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FILE *fp; |
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char *fn; |
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int ln; |
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{ |
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static char inpbuf[MAXLINE]; |
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|
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infile = file; |
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infp = fp; |
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linbuf = inpbuf; |
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infile = fn; |
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lineno = ln; |
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linepos = 0; |
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inpbuf[0] = '\0'; |
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scan(); |
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} |
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|
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initstr(file, s) /* prepare input string */ |
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char *file; |
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initstr(s, fn, ln) /* prepare input string */ |
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char *s; |
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char *fn; |
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int ln; |
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{ |
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infile = file; |
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infp = NULL; |
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infile = fn; |
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lineno = ln; |
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linbuf = s; |
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linepos = 0; |
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scan(); |
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} |
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scan() /* scan next character */ |
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getscanpos(fnp, lnp, spp, fpp) /* return current scan position */ |
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char **fnp; |
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int *lnp; |
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char **spp; |
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FILE **fpp; |
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{ |
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if (fnp != NULL) *fnp = infile; |
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if (lnp != NULL) *lnp = lineno; |
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if (spp != NULL) *spp = linbuf+linepos; |
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if (fpp != NULL) *fpp = infp; |
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} |
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|
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|
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int |
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scan() /* scan next character, return literal next */ |
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{ |
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register int lnext = 0; |
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|
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do { |
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if (linbuf[linepos] == '\0') |
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if (infp == NULL || fgets(linbuf, MAXLINE, infp) == NULL) |
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nextc = EOF; |
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else { |
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nextc = linbuf[0]; |
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lineno++; |
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linepos = 1; |
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} |
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else |
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nextc = linbuf[linepos++]; |
358 |
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if (!lnext) |
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lnext = nextc; |
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if (nextc == '{') { |
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scan(); |
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while (nextc != '}') |
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scan(); |
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} |
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} while (isspace(nextc)); |
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return(lnext); |
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} |
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|
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|
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char * |
375 |
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ltoa(l) /* convert long to ascii */ |
376 |
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long l; |
377 |
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{ |
378 |
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static char buf[16]; |
379 |
+ |
register char *cp; |
380 |
+ |
int neg = 0; |
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|
382 |
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if (l == 0) |
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return("0"); |
384 |
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if (l < 0) { |
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l = -l; |
386 |
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neg++; |
387 |
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} |
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cp = buf + sizeof(buf); |
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*--cp = '\0'; |
390 |
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while (l) { |
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*--cp = l % 10 + '0'; |
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l /= 10; |
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} |
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if (neg) |
395 |
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*--cp = '-'; |
396 |
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return(cp); |
397 |
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} |
398 |
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|
399 |
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|
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syntax(err) /* report syntax error and quit */ |
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char *err; |
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{ |
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register int i; |
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|
405 |
+ |
if (infile != NULL || lineno != 0) { |
406 |
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if (infile != NULL) eputs(infile); |
407 |
+ |
if (lineno != 0) { |
408 |
+ |
eputs(infile != NULL ? ", line " : "line "); |
409 |
+ |
eputs(ltoa((long)lineno)); |
410 |
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} |
411 |
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eputs(": syntax error:\n"); |
412 |
+ |
} |
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eputs(linbuf); |
414 |
< |
if (linbuf[0] == '\0' || linbuf[strlen(linbuf)-1] != '\n') |
414 |
> |
if (linbuf[strlen(linbuf)-1] != '\n') |
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eputs("\n"); |
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for (i = 0; i < linepos-1; i++) |
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eputs(linbuf[i] == '\t' ? "\t" : " "); |
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eputs("^ "); |
355 |
– |
if (infile != NULL) { |
356 |
– |
eputs(infile); |
357 |
– |
eputs(": "); |
358 |
– |
} |
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eputs(err); |
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eputs("\n"); |
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quit(1); |
441 |
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getname() /* scan an identifier */ |
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{ |
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static char str[MAXWORD+1]; |
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< |
register int i; |
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> |
register int i, lnext; |
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|
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for (i = 0; i < MAXWORD && isid(nextc); i++, scan()) |
447 |
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str[i] = nextc; |
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> |
lnext = nextc; |
447 |
> |
for (i = 0; i < MAXWORD && isid(lnext); i++, lnext = scan()) |
448 |
> |
str[i] = lnext; |
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str[i] = '\0'; |
450 |
+ |
while (isid(lnext)) /* skip rest of name */ |
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+ |
lnext = scan(); |
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|
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return(str); |
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} |
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int |
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getinum() /* scan a positive integer */ |
459 |
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{ |
460 |
< |
register int n; |
460 |
> |
register int n, lnext; |
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|
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n = 0; |
463 |
< |
while (isdigit(nextc)) { |
464 |
< |
n = n * 10 + nextc - '0'; |
465 |
< |
scan(); |
463 |
> |
lnext = nextc; |
464 |
> |
while (isdigit(lnext)) { |
465 |
> |
n = n * 10 + lnext - '0'; |
466 |
> |
lnext = scan(); |
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} |
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return(n); |
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} |
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double |
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getnum() /* scan a positive float */ |
474 |
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{ |
475 |
< |
register int i; |
475 |
> |
register int i, lnext; |
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char str[MAXWORD+1]; |
477 |
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|
478 |
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i = 0; |
479 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
480 |
< |
str[i++] = nextc; |
481 |
< |
scan(); |
479 |
> |
lnext = nextc; |
480 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
481 |
> |
str[i++] = lnext; |
482 |
> |
lnext = scan(); |
483 |
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} |
484 |
< |
if (nextc == '.' && i < MAXWORD) { |
485 |
< |
str[i++] = nextc; |
486 |
< |
scan(); |
487 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
488 |
< |
str[i++] = nextc; |
489 |
< |
scan(); |
484 |
> |
if (lnext == '.' && i < MAXWORD) { |
485 |
> |
str[i++] = lnext; |
486 |
> |
lnext = scan(); |
487 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
488 |
> |
str[i++] = lnext; |
489 |
> |
lnext = scan(); |
490 |
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} |
491 |
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} |
492 |
< |
if ((nextc == 'e' || nextc == 'E') && i < MAXWORD) { |
493 |
< |
str[i++] = nextc; |
494 |
< |
scan(); |
495 |
< |
if ((nextc == '-' || nextc == '+') && i < MAXWORD) { |
496 |
< |
str[i++] = nextc; |
497 |
< |
scan(); |
492 |
> |
if ((lnext == 'e' || lnext == 'E') && i < MAXWORD) { |
493 |
> |
str[i++] = lnext; |
494 |
> |
lnext = scan(); |
495 |
> |
if ((lnext == '-' || lnext == '+') && i < MAXWORD) { |
496 |
> |
str[i++] = lnext; |
497 |
> |
lnext = scan(); |
498 |
|
} |
499 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
500 |
< |
str[i++] = nextc; |
501 |
< |
scan(); |
499 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
500 |
> |
str[i++] = lnext; |
501 |
> |
lnext = scan(); |
502 |
|
} |
503 |
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} |
504 |
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str[i] = '\0'; |
554 |
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|
555 |
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|
556 |
|
EPNODE * |
557 |
< |
getE3() /* E3 -> E3 ^ E4 */ |
557 |
> |
getE3() /* E3 -> E4 ^ E3 */ |
558 |
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/* E4 */ |
559 |
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{ |
560 |
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register EPNODE *ep1, *ep2; |
561 |
|
|
562 |
|
ep1 = getE4(); |
563 |
< |
while (nextc == '^') { |
563 |
> |
if (nextc == '^') { |
564 |
|
ep2 = newnode(); |
565 |
|
ep2->type = nextc; |
566 |
|
scan(); |
567 |
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addekid(ep2, ep1); |
568 |
< |
addekid(ep2, getE4()); |
568 |
> |
addekid(ep2, getE3()); |
569 |
|
#ifdef RCONST |
570 |
|
if (ep1->type == NUM && ep1->sibling->type == NUM) |
571 |
|
ep2 = rconst(ep2); |
572 |
|
#endif |
573 |
< |
ep1 = ep2; |
573 |
> |
return(ep2); |
574 |
|
} |
575 |
|
return(ep1); |
576 |
|
} |
580 |
|
getE4() /* E4 -> ADDOP E5 */ |
581 |
|
/* E5 */ |
582 |
|
{ |
583 |
< |
register EPNODE *ep1; |
583 |
> |
register EPNODE *ep1, *ep2; |
584 |
|
|
585 |
|
if (nextc == '-') { |
586 |
|
scan(); |
587 |
< |
ep1 = newnode(); |
588 |
< |
#ifndef RCONST |
589 |
< |
if (isdecimal(nextc)) { |
590 |
< |
ep1->type = NUM; |
526 |
< |
ep1->v.num = -getnum(); |
527 |
< |
return(ep1); |
587 |
> |
ep2 = getE5(); |
588 |
> |
if (ep2->type == NUM) { |
589 |
> |
ep2->v.num = -ep2->v.num; |
590 |
> |
return(ep2); |
591 |
|
} |
592 |
< |
#endif |
592 |
> |
if (ep2->type == UMINUS) { /* don't generate -(-E5) */ |
593 |
> |
efree((char *)ep2); |
594 |
> |
return(ep2->v.kid); |
595 |
> |
} |
596 |
> |
ep1 = newnode(); |
597 |
|
ep1->type = UMINUS; |
598 |
< |
addekid(ep1, getE5()); |
532 |
< |
#ifdef RCONST |
533 |
< |
if (ep1->v.kid->type == NUM) |
534 |
< |
ep1 = rconst(ep1); |
535 |
< |
#endif |
598 |
> |
addekid(ep1, ep2); |
599 |
|
return(ep1); |
600 |
|
} |
601 |
|
if (nextc == '+') |
613 |
|
/* ARG */ |
614 |
|
{ |
615 |
|
int i; |
616 |
+ |
char *nam; |
617 |
|
register EPNODE *ep1, *ep2; |
618 |
|
|
619 |
|
if (nextc == '(') { |
636 |
|
#endif |
637 |
|
|
638 |
|
#if defined(VARIABLE) || defined(FUNCTION) |
639 |
< |
if (isalpha(nextc)) { |
640 |
< |
ep1 = newnode(); |
577 |
< |
ep1->type = VAR; |
578 |
< |
ep1->v.ln = varinsert(getname()); |
579 |
< |
|
639 |
> |
if (isalpha(nextc) || nextc == CNTXMARK) { |
640 |
> |
nam = getname(); |
641 |
|
#if defined(VARIABLE) && defined(FUNCTION) |
642 |
+ |
ep1 = NULL; |
643 |
|
if (curfunc != NULL) |
644 |
|
for (i = 1, ep2 = curfunc->v.kid->sibling; |
645 |
|
ep2 != NULL; i++, ep2 = ep2->sibling) |
646 |
< |
if (!strcmp(ep2->v.name, ep1->v.ln->name)) { |
585 |
< |
epfree(ep1); |
646 |
> |
if (!strcmp(ep2->v.name, nam)) { |
647 |
|
ep1 = newnode(); |
648 |
|
ep1->type = ARG; |
649 |
|
ep1->v.chan = i; |
650 |
|
break; |
651 |
|
} |
652 |
+ |
if (ep1 == NULL) |
653 |
|
#endif |
654 |
+ |
{ |
655 |
+ |
ep1 = newnode(); |
656 |
+ |
ep1->type = VAR; |
657 |
+ |
ep1->v.ln = varinsert(nam); |
658 |
+ |
} |
659 |
|
#ifdef FUNCTION |
660 |
|
if (nextc == '(') { |
661 |
|
ep2 = newnode(); |
675 |
|
syntax("'(' expected"); |
676 |
|
#endif |
677 |
|
#endif |
678 |
+ |
#ifdef RCONST |
679 |
+ |
if (isconstvar(ep1)) |
680 |
+ |
ep1 = rconst(ep1); |
681 |
+ |
#endif |
682 |
|
return(ep1); |
683 |
|
} |
684 |
|
#endif |
710 |
|
|
711 |
|
return(ep); |
712 |
|
} |
713 |
+ |
|
714 |
+ |
|
715 |
+ |
isconstvar(ep) /* is ep linked to a constant expression? */ |
716 |
+ |
register EPNODE *ep; |
717 |
+ |
{ |
718 |
+ |
#ifdef VARIABLE |
719 |
+ |
register EPNODE *ep1; |
720 |
+ |
#ifdef FUNCTION |
721 |
+ |
|
722 |
+ |
if (ep->type == FUNC) { |
723 |
+ |
if (!isconstfun(ep->v.kid)) |
724 |
+ |
return(0); |
725 |
+ |
for (ep1 = ep->v.kid->sibling; ep1 != NULL; ep1 = ep1->sibling) |
726 |
+ |
if (ep1->type != NUM && !isconstfun(ep1)) |
727 |
+ |
return(0); |
728 |
+ |
return(1); |
729 |
+ |
} |
730 |
+ |
#endif |
731 |
+ |
if (ep->type != VAR) |
732 |
+ |
return(0); |
733 |
+ |
ep1 = ep->v.ln->def; |
734 |
+ |
if (ep1 == NULL || ep1->type != ':') |
735 |
+ |
return(0); |
736 |
+ |
#ifdef FUNCTION |
737 |
+ |
if (ep1->v.kid->type != SYM) |
738 |
+ |
return(0); |
739 |
+ |
#endif |
740 |
+ |
return(1); |
741 |
+ |
#else |
742 |
+ |
return(ep->type == FUNC); |
743 |
+ |
#endif |
744 |
+ |
} |
745 |
+ |
|
746 |
+ |
|
747 |
+ |
#if defined(FUNCTION) && defined(VARIABLE) |
748 |
+ |
isconstfun(ep) /* is ep linked to a constant function? */ |
749 |
+ |
register EPNODE *ep; |
750 |
+ |
{ |
751 |
+ |
register EPNODE *dp; |
752 |
+ |
register LIBR *lp; |
753 |
+ |
|
754 |
+ |
if (ep->type != VAR) |
755 |
+ |
return(0); |
756 |
+ |
if ((dp = ep->v.ln->def) != NULL && dp->v.kid->type == FUNC) |
757 |
+ |
return(dp->type == ':'); |
758 |
+ |
if ((lp = ep->v.ln->lib) != NULL) |
759 |
+ |
return(lp->atyp == ':'); |
760 |
+ |
return(0); |
761 |
+ |
} |
762 |
+ |
#endif |
763 |
|
#endif |