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/* Copyright (c) 1991 Regents of the University of California */ |
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/* Copyright (c) 1992 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 <errno.h> |
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#include <math.h> |
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#include "calcomp.h" |
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#define MAXLINE 256 /* maximum line length */ |
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#define MAXLINE 256 /* maximum line length */ |
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#define newnode() (EPNODE *)ecalloc(1, sizeof(EPNODE)) |
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#define newnode() (EPNODE *)ecalloc(1, sizeof(EPNODE)) |
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
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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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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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int nextc; /* lookahead character */ |
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double (*eoper[])() = { /* expression operations */ |
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double (*eoper[])() = { /* expression operations */ |
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ebotch, |
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#ifdef VARIABLE |
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#ifdef VARIABLE |
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evariable, |
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#else |
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ebotch, |
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#endif |
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enumber, |
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euminus, |
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#ifdef INCHAN |
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#ifdef INCHAN |
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echannel, |
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#else |
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ebotch, |
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#endif |
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#ifdef FUNCTION |
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#ifdef FUNCTION |
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efunc, |
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eargument, |
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#else |
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epfree(epar) /* free a parse tree */ |
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register EPNODE *epar; |
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register EPNODE *epar; |
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{ |
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register EPNODE *ep; |
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break; |
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default: |
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for (ep = epar->v.kid; ep != NULL; ep = ep->sibling) |
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while ((ep = epar->v.kid) != NULL) { |
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epar->v.kid = ep->sibling; |
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epfree(ep); |
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} |
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break; |
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} |
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} |
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/* the following used to be a switch */ |
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#ifdef FUNCTION |
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#ifdef FUNCTION |
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static double |
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eargument(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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return(argument(ep->v.chan)); |
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} |
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static double |
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enumber(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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return(ep->v.num); |
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} |
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static double |
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euminus(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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return(-evalue(ep1)); |
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} |
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#ifdef INCHAN |
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#ifdef INCHAN |
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static double |
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echannel(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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return(chanvalue(ep->v.chan)); |
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} |
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static double |
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eadd(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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static double |
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esubtr(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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static double |
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emult(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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static double |
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edivi(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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double d; |
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static double |
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epow(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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double d; |
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int lasterrno; |
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int lasterrno; |
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lasterrno = errno; |
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errno = 0; |
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d = pow(evalue(ep1), evalue(ep1->sibling)); |
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#ifdef IEEE |
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#ifdef IEEE |
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if (!finite(d)) |
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errno = EDOM; |
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#endif |
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static double |
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ebotch(ep) |
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EPNODE *ep; |
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EPNODE *ep; |
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{ |
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eputs("Bad expression!\n"); |
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quit(1); |
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EPNODE * |
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ekid(ep, n) /* return pointer to a node's nth kid */ |
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register EPNODE *ep; |
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register EPNODE *ep; |
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register int n; |
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{ |
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int |
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nekids(ep) /* return # of kids for node ep */ |
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register EPNODE *ep; |
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register EPNODE *ep; |
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{ |
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register int n = 0; |
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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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static char inpbuf[MAXLINE]; |
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infp = fp; |
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linbuf = inpbuf; |
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char * |
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ltoa(l) /* convert long to ascii */ |
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long2ascii(l) /* convert long to ascii */ |
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long l; |
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static char buf[16]; |
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static char buf[16]; |
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register char *cp; |
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int neg = 0; |
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int neg = 0; |
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if (l == 0) |
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return("0"); |
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if (infile != NULL) eputs(infile); |
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if (lineno != 0) { |
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eputs(infile != NULL ? ", line " : "line "); |
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eputs(ltoa((long)lineno)); |
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eputs(long2ascii((long)lineno)); |
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} |
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eputs(": syntax error:\n"); |
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eputs(":\n"); |
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} |
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eputs(linbuf); |
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if (linbuf[strlen(linbuf)-1] != '\n') |
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addekid(ep, ekid) /* add a child to ep */ |
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register EPNODE *ep; |
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EPNODE *ekid; |
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register EPNODE *ep; |
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EPNODE *ekid; |
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{ |
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if (ep->v.kid == NULL) |
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ep->v.kid = ekid; |
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char * |
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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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static char str[MAXWORD+1]; |
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register int i, lnext; |
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lnext = nextc; |
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lnext = scan(); |
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} |
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if (lnext == '.' && i < MAXWORD) { |
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str[i++] = lnext; |
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lnext = scan(); |
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str[i++] = lnext; |
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lnext = scan(); |
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while (isdigit(lnext) && i < MAXWORD) { |
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str[i++] = lnext; |
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lnext = scan(); |
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} |
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} |
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if ((lnext == 'e' || lnext == 'E') && i < MAXWORD) { |
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str[i++] = lnext; |
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lnext = scan(); |
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str[i++] = lnext; |
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lnext = scan(); |
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if ((lnext == '-' || lnext == '+') && i < MAXWORD) { |
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str[i++] = lnext; |
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lnext = scan(); |
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EPNODE * |
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getE1() /* E1 -> E1 ADDOP E2 */ |
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/* E2 */ |
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/* E2 */ |
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{ |
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register EPNODE *ep1, *ep2; |
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scan(); |
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addekid(ep2, ep1); |
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addekid(ep2, getE2()); |
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#ifdef RCONST |
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> |
#ifdef RCONST |
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if (ep1->type == NUM && ep1->sibling->type == NUM) |
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ep2 = rconst(ep2); |
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#endif |
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EPNODE * |
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getE2() /* E2 -> E2 MULOP E3 */ |
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/* E3 */ |
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/* E3 */ |
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{ |
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register EPNODE *ep1, *ep2; |
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scan(); |
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addekid(ep2, ep1); |
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addekid(ep2, getE3()); |
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#ifdef RCONST |
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> |
#ifdef RCONST |
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if (ep1->type == NUM && ep1->sibling->type == NUM) |
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ep2 = rconst(ep2); |
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#endif |
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EPNODE * |
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getE3() /* E3 -> E4 ^ E3 */ |
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/* E4 */ |
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/* E4 */ |
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{ |
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register EPNODE *ep1, *ep2; |
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|
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scan(); |
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addekid(ep2, ep1); |
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addekid(ep2, getE3()); |
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< |
#ifdef RCONST |
573 |
> |
#ifdef RCONST |
574 |
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if (ep1->type == NUM && ep1->sibling->type == NUM) |
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ep2 = rconst(ep2); |
576 |
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#endif |
582 |
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|
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EPNODE * |
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getE4() /* E4 -> ADDOP E5 */ |
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< |
/* E5 */ |
585 |
> |
/* E5 */ |
586 |
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{ |
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register EPNODE *ep1, *ep2; |
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|
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EPNODE * |
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getE5() /* E5 -> (E1) */ |
613 |
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/* VAR */ |
614 |
< |
/* NUM */ |
615 |
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/* $N */ |
616 |
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/* FUNC(E1,..) */ |
617 |
< |
/* ARG */ |
613 |
> |
/* VAR */ |
614 |
> |
/* NUM */ |
615 |
> |
/* $N */ |
616 |
> |
/* FUNC(E1,..) */ |
617 |
> |
/* ARG */ |
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{ |
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< |
int i; |
619 |
> |
int i; |
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char *nam; |
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register EPNODE *ep1, *ep2; |
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|
629 |
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return(ep1); |
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} |
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< |
#ifdef INCHAN |
632 |
> |
#ifdef INCHAN |
633 |
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if (nextc == '$') { |
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scan(); |
635 |
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ep1 = newnode(); |
646 |
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ep1 = NULL; |
647 |
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if (curfunc != NULL) |
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for (i = 1, ep2 = curfunc->v.kid->sibling; |
649 |
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ep2 != NULL; i++, ep2 = ep2->sibling) |
649 |
> |
ep2 != NULL; i++, ep2 = ep2->sibling) |
650 |
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if (!strcmp(ep2->v.name, nam)) { |
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ep1 = newnode(); |
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ep1->type = ARG; |
660 |
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ep1->type = VAR; |
661 |
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ep1->v.ln = varinsert(nam); |
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} |
663 |
< |
#ifdef FUNCTION |
663 |
> |
#ifdef FUNCTION |
664 |
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if (nextc == '(') { |
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ep2 = newnode(); |
666 |
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ep2->type = FUNC; |
674 |
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syntax("')' expected"); |
675 |
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scan(); |
676 |
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} |
677 |
< |
#ifndef VARIABLE |
677 |
> |
#ifndef VARIABLE |
678 |
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else |
679 |
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syntax("'(' expected"); |
680 |
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#endif |
681 |
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#endif |
682 |
< |
#ifdef RCONST |
682 |
> |
#ifdef RCONST |
683 |
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if (isconstvar(ep1)) |
684 |
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ep1 = rconst(ep1); |
685 |
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#endif |
697 |
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} |
698 |
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699 |
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|
700 |
< |
#ifdef RCONST |
700 |
> |
#ifdef RCONST |
701 |
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EPNODE * |
702 |
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rconst(epar) /* reduce a constant expression */ |
703 |
< |
register EPNODE *epar; |
703 |
> |
register EPNODE *epar; |
704 |
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{ |
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register EPNODE *ep; |
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|
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errno = 0; |
710 |
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ep->v.num = evalue(epar); |
711 |
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if (errno) |
712 |
< |
syntax("bad constant expression"); |
712 |
> |
syntax("bad constant expression"); |
713 |
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epfree(epar); |
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|
715 |
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return(ep); |
717 |
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718 |
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|
719 |
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isconstvar(ep) /* is ep linked to a constant expression? */ |
720 |
< |
register EPNODE *ep; |
720 |
> |
register EPNODE *ep; |
721 |
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{ |
722 |
< |
#ifdef VARIABLE |
722 |
> |
#ifdef VARIABLE |
723 |
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register EPNODE *ep1; |
724 |
< |
#ifdef FUNCTION |
724 |
> |
#ifdef FUNCTION |
725 |
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|
726 |
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if (ep->type == FUNC) { |
727 |
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if (!isconstfun(ep->v.kid)) |
737 |
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ep1 = ep->v.ln->def; |
738 |
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if (ep1 == NULL || ep1->type != ':') |
739 |
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return(0); |
740 |
< |
#ifdef FUNCTION |
740 |
> |
#ifdef FUNCTION |
741 |
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if (ep1->v.kid->type != SYM) |
742 |
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return(0); |
743 |
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#endif |
750 |
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|
751 |
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#if defined(FUNCTION) && defined(VARIABLE) |
752 |
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isconstfun(ep) /* is ep linked to a constant function? */ |
753 |
< |
register EPNODE *ep; |
753 |
> |
register EPNODE *ep; |
754 |
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{ |
755 |
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register EPNODE *dp; |
756 |
|
register LIBR *lp; |