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/* Copyright (c) 1986 Regents of the University of California */ |
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|
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Compute data values using expression parser |
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* |
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* 1/29/87 Made variables conditional (VARIABLE) |
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* |
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* 5/19/88 Added constant subexpression elimination (RCONST) |
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* |
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* 2/19/03 Eliminated conditional compiles in favor of esupport extern. |
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*/ |
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#include "copyright.h" |
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|
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#include <stdio.h> |
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#include <ctype.h> |
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#include <errno.h> |
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|
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#include <math.h> |
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|
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#include <stdlib.h> |
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|
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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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#define MAXLINE 256 /* maximum line length */ |
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|
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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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|
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#define isid(c) (isalnum(c) || (c) == '_' || (c) == '.') |
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
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|
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#define isdecimal(c) (isdigit(c) || (c) == '.') |
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> |
static double euminus(), eargument(), enumber(); |
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static double echannel(); |
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static double eadd(), esubtr(), emult(), edivi(), epow(); |
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static double ebotch(); |
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|
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extern double atof(), 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 int errno; |
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unsigned int esupport = /* what to support */ |
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E_VARIABLE | E_FUNCTION ; |
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|
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int nextc; /* lookahead character */ |
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|
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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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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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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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efunc, |
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eargument, |
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#else |
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ebotch, |
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ebotch, |
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#endif |
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ebotch, |
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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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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, |
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emult, |
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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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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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#if defined(VARIABLE) && defined(FUNCTION) |
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initstr(expr, NULL, 0); |
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curfunc = NULL; |
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#endif |
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ep = getE1(); |
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if (nextc != EOF) |
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syntax("unexpected character"); |
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} |
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|
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|
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int |
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epcmp(ep1, ep2) /* compare two expressions for equivalence */ |
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register EPNODE *ep1, *ep2; |
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{ |
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double d; |
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|
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if (ep1->type != ep2->type) |
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return(1); |
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|
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switch (ep1->type) { |
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|
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case VAR: |
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return(ep1->v.ln != ep2->v.ln); |
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|
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case NUM: |
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if (ep2->v.num == 0) |
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return(ep1->v.num != 0); |
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d = ep1->v.num / ep2->v.num; |
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return(d > 1.000000000001 | d < 0.999999999999); |
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|
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case CHAN: |
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case ARG: |
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return(ep1->v.chan != ep2->v.chan); |
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|
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case '=': |
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case ':': |
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return(epcmp(ep1->v.kid->sibling, ep2->v.kid->sibling)); |
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|
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case TICK: |
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case SYM: /* should never get this one */ |
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return(0); |
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|
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default: |
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ep1 = ep1->v.kid; |
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ep2 = ep2->v.kid; |
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while (ep1 != NULL) { |
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if (ep2 == NULL) |
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return(1); |
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if (epcmp(ep1, ep2)) |
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return(1); |
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ep1 = ep1->sibling; |
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ep2 = ep2->sibling; |
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} |
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return(ep2 != NULL); |
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} |
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} |
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|
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|
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void |
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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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|
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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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break; |
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|
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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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} |
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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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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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#endif |
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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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|
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static double |
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euminus(ep) |
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EPNODE *ep; |
212 |
> |
EPNODE *ep; |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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|
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return(-evalue(ep1)); |
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} |
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|
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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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#endif |
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|
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static double |
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eadd(ep) |
228 |
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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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|
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|
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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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|
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|
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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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|
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|
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static double |
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edivi(ep) |
255 |
< |
EPNODE *ep; |
255 |
> |
EPNODE *ep; |
256 |
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{ |
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register EPNODE *ep1 = ep->v.kid; |
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double d; |
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|
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static double |
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epow(ep) |
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< |
EPNODE *ep; |
271 |
> |
EPNODE *ep; |
272 |
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{ |
273 |
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register EPNODE *ep1 = ep->v.kid; |
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double d; |
275 |
< |
int lasterrno; |
275 |
> |
int lasterrno; |
276 |
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|
277 |
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lasterrno = errno; |
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errno = 0; |
279 |
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d = pow(evalue(ep1), evalue(ep1->sibling)); |
280 |
< |
#ifdef IEEE |
280 |
> |
#ifdef IEEE |
281 |
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if (!finite(d)) |
282 |
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errno = EDOM; |
283 |
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#endif |
284 |
< |
if (errno) { |
284 |
> |
if (errno == EDOM || errno == ERANGE) { |
285 |
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wputs("Illegal power\n"); |
286 |
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return(0.0); |
287 |
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} |
291 |
|
|
292 |
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static double |
293 |
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ebotch(ep) |
294 |
< |
EPNODE *ep; |
294 |
> |
EPNODE *ep; |
295 |
|
{ |
296 |
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eputs("Bad expression!\n"); |
297 |
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quit(1); |
300 |
|
|
301 |
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EPNODE * |
302 |
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ekid(ep, n) /* return pointer to a node's nth kid */ |
303 |
< |
register EPNODE *ep; |
303 |
> |
register EPNODE *ep; |
304 |
|
register int n; |
305 |
|
{ |
306 |
|
|
314 |
|
|
315 |
|
int |
316 |
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nekids(ep) /* return # of kids for node ep */ |
317 |
< |
register EPNODE *ep; |
317 |
> |
register EPNODE *ep; |
318 |
|
{ |
319 |
|
register int n = 0; |
320 |
|
|
325 |
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} |
326 |
|
|
327 |
|
|
328 |
< |
initfile(file, fp) /* prepare input file */ |
329 |
< |
char *file; |
328 |
> |
void |
329 |
> |
initfile(fp, fn, ln) /* prepare input file */ |
330 |
|
FILE *fp; |
331 |
+ |
char *fn; |
332 |
+ |
int ln; |
333 |
|
{ |
334 |
< |
static char inpbuf[MAXLINE]; |
334 |
> |
static char inpbuf[MAXLINE]; |
335 |
|
|
300 |
– |
infile = file; |
336 |
|
infp = fp; |
337 |
|
linbuf = inpbuf; |
338 |
+ |
infile = fn; |
339 |
+ |
lineno = ln; |
340 |
|
linepos = 0; |
341 |
|
inpbuf[0] = '\0'; |
342 |
|
scan(); |
343 |
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} |
344 |
|
|
345 |
|
|
346 |
< |
initstr(file, s) /* prepare input string */ |
347 |
< |
char *file; |
346 |
> |
void |
347 |
> |
initstr(s, fn, ln) /* prepare input string */ |
348 |
|
char *s; |
349 |
+ |
char *fn; |
350 |
+ |
int ln; |
351 |
|
{ |
313 |
– |
infile = file; |
352 |
|
infp = NULL; |
353 |
+ |
infile = fn; |
354 |
+ |
lineno = ln; |
355 |
|
linbuf = s; |
356 |
|
linepos = 0; |
357 |
|
scan(); |
358 |
|
} |
359 |
|
|
360 |
|
|
361 |
< |
scan() /* scan next character */ |
361 |
> |
void |
362 |
> |
getscanpos(fnp, lnp, spp, fpp) /* return current scan position */ |
363 |
> |
char **fnp; |
364 |
> |
int *lnp; |
365 |
> |
char **spp; |
366 |
> |
FILE **fpp; |
367 |
|
{ |
368 |
+ |
if (fnp != NULL) *fnp = infile; |
369 |
+ |
if (lnp != NULL) *lnp = lineno; |
370 |
+ |
if (spp != NULL) *spp = linbuf+linepos; |
371 |
+ |
if (fpp != NULL) *fpp = infp; |
372 |
+ |
} |
373 |
+ |
|
374 |
+ |
|
375 |
+ |
int |
376 |
+ |
scan() /* scan next character, return literal next */ |
377 |
+ |
{ |
378 |
+ |
register int lnext = 0; |
379 |
+ |
|
380 |
|
do { |
381 |
|
if (linbuf[linepos] == '\0') |
382 |
|
if (infp == NULL || fgets(linbuf, MAXLINE, infp) == NULL) |
383 |
|
nextc = EOF; |
384 |
|
else { |
385 |
|
nextc = linbuf[0]; |
386 |
+ |
lineno++; |
387 |
|
linepos = 1; |
388 |
|
} |
389 |
|
else |
390 |
|
nextc = linbuf[linepos++]; |
391 |
+ |
if (!lnext) |
392 |
+ |
lnext = nextc; |
393 |
|
if (nextc == '{') { |
394 |
|
scan(); |
395 |
|
while (nextc != '}') |
400 |
|
scan(); |
401 |
|
} |
402 |
|
} while (isspace(nextc)); |
403 |
+ |
return(lnext); |
404 |
|
} |
405 |
|
|
406 |
|
|
407 |
+ |
char * |
408 |
+ |
long2ascii(l) /* convert long to ascii */ |
409 |
+ |
long l; |
410 |
+ |
{ |
411 |
+ |
static char buf[16]; |
412 |
+ |
register char *cp; |
413 |
+ |
int neg = 0; |
414 |
+ |
|
415 |
+ |
if (l == 0) |
416 |
+ |
return("0"); |
417 |
+ |
if (l < 0) { |
418 |
+ |
l = -l; |
419 |
+ |
neg++; |
420 |
+ |
} |
421 |
+ |
cp = buf + sizeof(buf); |
422 |
+ |
*--cp = '\0'; |
423 |
+ |
while (l) { |
424 |
+ |
*--cp = l % 10 + '0'; |
425 |
+ |
l /= 10; |
426 |
+ |
} |
427 |
+ |
if (neg) |
428 |
+ |
*--cp = '-'; |
429 |
+ |
return(cp); |
430 |
+ |
} |
431 |
+ |
|
432 |
+ |
|
433 |
+ |
void |
434 |
|
syntax(err) /* report syntax error and quit */ |
435 |
|
char *err; |
436 |
|
{ |
437 |
|
register int i; |
438 |
|
|
439 |
+ |
if (infile != NULL || lineno != 0) { |
440 |
+ |
if (infile != NULL) eputs(infile); |
441 |
+ |
if (lineno != 0) { |
442 |
+ |
eputs(infile != NULL ? ", line " : "line "); |
443 |
+ |
eputs(long2ascii((long)lineno)); |
444 |
+ |
} |
445 |
+ |
eputs(":\n"); |
446 |
+ |
} |
447 |
|
eputs(linbuf); |
448 |
< |
if (linbuf[0] == '\0' || linbuf[strlen(linbuf)-1] != '\n') |
448 |
> |
if (linbuf[strlen(linbuf)-1] != '\n') |
449 |
|
eputs("\n"); |
450 |
|
for (i = 0; i < linepos-1; i++) |
451 |
|
eputs(linbuf[i] == '\t' ? "\t" : " "); |
452 |
|
eputs("^ "); |
357 |
– |
if (infile != NULL) { |
358 |
– |
eputs(infile); |
359 |
– |
eputs(": "); |
360 |
– |
} |
453 |
|
eputs(err); |
454 |
|
eputs("\n"); |
455 |
|
quit(1); |
456 |
|
} |
457 |
|
|
458 |
|
|
459 |
+ |
void |
460 |
|
addekid(ep, ekid) /* add a child to ep */ |
461 |
< |
register EPNODE *ep; |
462 |
< |
EPNODE *ekid; |
461 |
> |
register EPNODE *ep; |
462 |
> |
EPNODE *ekid; |
463 |
|
{ |
464 |
|
if (ep->v.kid == NULL) |
465 |
|
ep->v.kid = ekid; |
475 |
|
char * |
476 |
|
getname() /* scan an identifier */ |
477 |
|
{ |
478 |
< |
static char str[MAXWORD+1]; |
479 |
< |
register int i; |
478 |
> |
static char str[MAXWORD+1]; |
479 |
> |
register int i, lnext; |
480 |
|
|
481 |
< |
for (i = 0; i < MAXWORD && isid(nextc); i++, scan()) |
482 |
< |
str[i] = nextc; |
481 |
> |
lnext = nextc; |
482 |
> |
for (i = 0; i < MAXWORD && isid(lnext); i++, lnext = scan()) |
483 |
> |
str[i] = lnext; |
484 |
|
str[i] = '\0'; |
485 |
+ |
while (isid(lnext)) /* skip rest of name */ |
486 |
+ |
lnext = scan(); |
487 |
|
|
488 |
|
return(str); |
489 |
|
} |
492 |
|
int |
493 |
|
getinum() /* scan a positive integer */ |
494 |
|
{ |
495 |
< |
register int n; |
495 |
> |
register int n, lnext; |
496 |
|
|
497 |
|
n = 0; |
498 |
< |
while (isdigit(nextc)) { |
499 |
< |
n = n * 10 + nextc - '0'; |
500 |
< |
scan(); |
498 |
> |
lnext = nextc; |
499 |
> |
while (isdigit(lnext)) { |
500 |
> |
n = n * 10 + lnext - '0'; |
501 |
> |
lnext = scan(); |
502 |
|
} |
503 |
|
return(n); |
504 |
|
} |
507 |
|
double |
508 |
|
getnum() /* scan a positive float */ |
509 |
|
{ |
510 |
< |
register int i; |
510 |
> |
register int i, lnext; |
511 |
|
char str[MAXWORD+1]; |
512 |
|
|
513 |
|
i = 0; |
514 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
515 |
< |
str[i++] = nextc; |
516 |
< |
scan(); |
514 |
> |
lnext = nextc; |
515 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
516 |
> |
str[i++] = lnext; |
517 |
> |
lnext = scan(); |
518 |
|
} |
519 |
< |
if (nextc == '.' && i < MAXWORD) { |
520 |
< |
str[i++] = nextc; |
521 |
< |
scan(); |
522 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
523 |
< |
str[i++] = nextc; |
524 |
< |
scan(); |
519 |
> |
if (lnext == '.' && i < MAXWORD) { |
520 |
> |
str[i++] = lnext; |
521 |
> |
lnext = scan(); |
522 |
> |
if (i == 1 && !isdigit(lnext)) |
523 |
> |
syntax("badly formed number"); |
524 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
525 |
> |
str[i++] = lnext; |
526 |
> |
lnext = scan(); |
527 |
|
} |
528 |
|
} |
529 |
< |
if ((nextc == 'e' || nextc == 'E') && i < MAXWORD) { |
530 |
< |
str[i++] = nextc; |
531 |
< |
scan(); |
532 |
< |
if ((nextc == '-' || nextc == '+') && i < MAXWORD) { |
533 |
< |
str[i++] = nextc; |
534 |
< |
scan(); |
529 |
> |
if ((lnext == 'e' | lnext == 'E') && i < MAXWORD) { |
530 |
> |
str[i++] = lnext; |
531 |
> |
lnext = scan(); |
532 |
> |
if ((lnext == '-' | lnext == '+') && i < MAXWORD) { |
533 |
> |
str[i++] = lnext; |
534 |
> |
lnext = scan(); |
535 |
|
} |
536 |
< |
while (isdigit(nextc) && i < MAXWORD) { |
537 |
< |
str[i++] = nextc; |
538 |
< |
scan(); |
536 |
> |
if (!isdigit(lnext)) |
537 |
> |
syntax("missing exponent"); |
538 |
> |
while (isdigit(lnext) && i < MAXWORD) { |
539 |
> |
str[i++] = lnext; |
540 |
> |
lnext = scan(); |
541 |
|
} |
542 |
|
} |
543 |
|
str[i] = '\0'; |
548 |
|
|
549 |
|
EPNODE * |
550 |
|
getE1() /* E1 -> E1 ADDOP E2 */ |
551 |
< |
/* E2 */ |
551 |
> |
/* E2 */ |
552 |
|
{ |
553 |
|
register EPNODE *ep1, *ep2; |
554 |
|
|
559 |
|
scan(); |
560 |
|
addekid(ep2, ep1); |
561 |
|
addekid(ep2, getE2()); |
562 |
< |
#ifdef RCONST |
563 |
< |
if (ep1->type == NUM && ep1->sibling->type == NUM) |
562 |
> |
if (esupport&E_RCONST && |
563 |
> |
ep1->type == NUM && ep1->sibling->type == NUM) |
564 |
|
ep2 = rconst(ep2); |
463 |
– |
#endif |
565 |
|
ep1 = ep2; |
566 |
|
} |
567 |
|
return(ep1); |
570 |
|
|
571 |
|
EPNODE * |
572 |
|
getE2() /* E2 -> E2 MULOP E3 */ |
573 |
< |
/* E3 */ |
573 |
> |
/* E3 */ |
574 |
|
{ |
575 |
|
register EPNODE *ep1, *ep2; |
576 |
|
|
581 |
|
scan(); |
582 |
|
addekid(ep2, ep1); |
583 |
|
addekid(ep2, getE3()); |
584 |
< |
#ifdef RCONST |
585 |
< |
if (ep1->type == NUM && ep1->sibling->type == NUM) |
584 |
> |
if (esupport&E_RCONST && |
585 |
> |
ep1->type == NUM && ep1->sibling->type == NUM) |
586 |
|
ep2 = rconst(ep2); |
486 |
– |
#endif |
587 |
|
ep1 = ep2; |
588 |
|
} |
589 |
|
return(ep1); |
591 |
|
|
592 |
|
|
593 |
|
EPNODE * |
594 |
< |
getE3() /* E3 -> E3 ^ E4 */ |
595 |
< |
/* E4 */ |
594 |
> |
getE3() /* E3 -> E4 ^ E3 */ |
595 |
> |
/* E4 */ |
596 |
|
{ |
597 |
|
register EPNODE *ep1, *ep2; |
598 |
|
|
599 |
|
ep1 = getE4(); |
600 |
< |
while (nextc == '^') { |
600 |
> |
if (nextc == '^') { |
601 |
|
ep2 = newnode(); |
602 |
|
ep2->type = nextc; |
603 |
|
scan(); |
604 |
|
addekid(ep2, ep1); |
605 |
< |
addekid(ep2, getE4()); |
606 |
< |
#ifdef RCONST |
607 |
< |
if (ep1->type == NUM && ep1->sibling->type == NUM) |
605 |
> |
addekid(ep2, getE3()); |
606 |
> |
if (esupport&E_RCONST && |
607 |
> |
ep1->type == NUM && ep1->sibling->type == NUM) |
608 |
|
ep2 = rconst(ep2); |
609 |
< |
#endif |
510 |
< |
ep1 = ep2; |
609 |
> |
return(ep2); |
610 |
|
} |
611 |
|
return(ep1); |
612 |
|
} |
614 |
|
|
615 |
|
EPNODE * |
616 |
|
getE4() /* E4 -> ADDOP E5 */ |
617 |
< |
/* E5 */ |
617 |
> |
/* E5 */ |
618 |
|
{ |
619 |
< |
register EPNODE *ep1; |
619 |
> |
register EPNODE *ep1, *ep2; |
620 |
|
|
621 |
|
if (nextc == '-') { |
622 |
|
scan(); |
623 |
< |
ep1 = newnode(); |
624 |
< |
#ifndef RCONST |
625 |
< |
if (isdecimal(nextc)) { |
626 |
< |
ep1->type = NUM; |
528 |
< |
ep1->v.num = -getnum(); |
529 |
< |
return(ep1); |
623 |
> |
ep2 = getE5(); |
624 |
> |
if (ep2->type == NUM) { |
625 |
> |
ep2->v.num = -ep2->v.num; |
626 |
> |
return(ep2); |
627 |
|
} |
628 |
< |
#endif |
628 |
> |
if (ep2->type == UMINUS) { /* don't generate -(-E5) */ |
629 |
> |
efree((char *)ep2); |
630 |
> |
return(ep2->v.kid); |
631 |
> |
} |
632 |
> |
ep1 = newnode(); |
633 |
|
ep1->type = UMINUS; |
634 |
< |
addekid(ep1, getE5()); |
534 |
< |
#ifdef RCONST |
535 |
< |
if (ep1->v.kid->type == NUM) |
536 |
< |
ep1 = rconst(ep1); |
537 |
< |
#endif |
634 |
> |
addekid(ep1, ep2); |
635 |
|
return(ep1); |
636 |
|
} |
637 |
|
if (nextc == '+') |
642 |
|
|
643 |
|
EPNODE * |
644 |
|
getE5() /* E5 -> (E1) */ |
645 |
< |
/* VAR */ |
646 |
< |
/* NUM */ |
647 |
< |
/* $N */ |
648 |
< |
/* FUNC(E1,..) */ |
649 |
< |
/* ARG */ |
645 |
> |
/* VAR */ |
646 |
> |
/* NUM */ |
647 |
> |
/* $N */ |
648 |
> |
/* FUNC(E1,..) */ |
649 |
> |
/* ARG */ |
650 |
|
{ |
651 |
< |
int i; |
651 |
> |
int i; |
652 |
> |
char *nam; |
653 |
|
register EPNODE *ep1, *ep2; |
654 |
|
|
655 |
|
if (nextc == '(') { |
661 |
|
return(ep1); |
662 |
|
} |
663 |
|
|
664 |
< |
#ifdef INCHAN |
567 |
< |
if (nextc == '$') { |
664 |
> |
if (esupport&E_INCHAN && nextc == '$') { |
665 |
|
scan(); |
666 |
|
ep1 = newnode(); |
667 |
|
ep1->type = CHAN; |
668 |
|
ep1->v.chan = getinum(); |
669 |
|
return(ep1); |
670 |
|
} |
574 |
– |
#endif |
671 |
|
|
672 |
< |
#if defined(VARIABLE) || defined(FUNCTION) |
673 |
< |
if (isalpha(nextc)) { |
674 |
< |
ep1 = newnode(); |
675 |
< |
ep1->type = VAR; |
676 |
< |
ep1->v.ln = varinsert(getname()); |
677 |
< |
|
582 |
< |
#if defined(VARIABLE) && defined(FUNCTION) |
583 |
< |
if (curfunc != NULL) |
672 |
> |
if (esupport&(E_VARIABLE|E_FUNCTION) && |
673 |
> |
(isalpha(nextc) || nextc == CNTXMARK)) { |
674 |
> |
nam = getname(); |
675 |
> |
ep1 = NULL; |
676 |
> |
if ((esupport&(E_VARIABLE|E_FUNCTION)) == (E_VARIABLE|E_FUNCTION) |
677 |
> |
&& curfunc != NULL) |
678 |
|
for (i = 1, ep2 = curfunc->v.kid->sibling; |
679 |
< |
ep2 != NULL; i++, ep2 = ep2->sibling) |
680 |
< |
if (!strcmp(ep2->v.name, ep1->v.ln->name)) { |
587 |
< |
epfree(ep1); |
679 |
> |
ep2 != NULL; i++, ep2 = ep2->sibling) |
680 |
> |
if (!strcmp(ep2->v.name, nam)) { |
681 |
|
ep1 = newnode(); |
682 |
|
ep1->type = ARG; |
683 |
|
ep1->v.chan = i; |
684 |
|
break; |
685 |
|
} |
686 |
< |
#endif |
687 |
< |
#ifdef FUNCTION |
688 |
< |
if (nextc == '(') { |
686 |
> |
if (ep1 == NULL) { |
687 |
> |
ep1 = newnode(); |
688 |
> |
ep1->type = VAR; |
689 |
> |
ep1->v.ln = varinsert(nam); |
690 |
> |
} |
691 |
> |
if (esupport&E_FUNCTION && nextc == '(') { |
692 |
|
ep2 = newnode(); |
693 |
|
ep2->type = FUNC; |
694 |
|
addekid(ep2, ep1); |
700 |
|
if (nextc != ')') |
701 |
|
syntax("')' expected"); |
702 |
|
scan(); |
703 |
< |
} |
608 |
< |
#ifndef VARIABLE |
609 |
< |
else |
703 |
> |
} else if (!(esupport&E_VARIABLE)) |
704 |
|
syntax("'(' expected"); |
705 |
< |
#endif |
706 |
< |
#endif |
705 |
> |
if (esupport&E_RCONST && isconstvar(ep1)) |
706 |
> |
ep1 = rconst(ep1); |
707 |
|
return(ep1); |
708 |
|
} |
615 |
– |
#endif |
709 |
|
|
710 |
|
if (isdecimal(nextc)) { |
711 |
|
ep1 = newnode(); |
717 |
|
} |
718 |
|
|
719 |
|
|
627 |
– |
#ifdef RCONST |
720 |
|
EPNODE * |
721 |
|
rconst(epar) /* reduce a constant expression */ |
722 |
< |
register EPNODE *epar; |
722 |
> |
register EPNODE *epar; |
723 |
|
{ |
724 |
|
register EPNODE *ep; |
725 |
|
|
727 |
|
ep->type = NUM; |
728 |
|
errno = 0; |
729 |
|
ep->v.num = evalue(epar); |
730 |
< |
if (errno) |
731 |
< |
syntax("bad constant expression"); |
730 |
> |
if (errno == EDOM || errno == ERANGE) |
731 |
> |
syntax("bad constant expression"); |
732 |
|
epfree(epar); |
733 |
|
|
734 |
|
return(ep); |
735 |
|
} |
736 |
< |
#endif |
736 |
> |
|
737 |
> |
|
738 |
> |
int |
739 |
> |
isconstvar(ep) /* is ep linked to a constant expression? */ |
740 |
> |
register EPNODE *ep; |
741 |
> |
{ |
742 |
> |
register EPNODE *ep1; |
743 |
> |
|
744 |
> |
if (esupport&E_FUNCTION && ep->type == FUNC) { |
745 |
> |
if (!isconstfun(ep->v.kid)) |
746 |
> |
return(0); |
747 |
> |
for (ep1 = ep->v.kid->sibling; ep1 != NULL; ep1 = ep1->sibling) |
748 |
> |
if (ep1->type != NUM && !isconstfun(ep1)) |
749 |
> |
return(0); |
750 |
> |
return(1); |
751 |
> |
} |
752 |
> |
if (ep->type != VAR) |
753 |
> |
return(0); |
754 |
> |
ep1 = ep->v.ln->def; |
755 |
> |
if (ep1 == NULL || ep1->type != ':') |
756 |
> |
return(0); |
757 |
> |
if (esupport&E_FUNCTION && ep1->v.kid->type != SYM) |
758 |
> |
return(0); |
759 |
> |
return(1); |
760 |
> |
} |
761 |
> |
|
762 |
> |
|
763 |
> |
int |
764 |
> |
isconstfun(ep) /* is ep linked to a constant function? */ |
765 |
> |
register EPNODE *ep; |
766 |
> |
{ |
767 |
> |
register EPNODE *dp; |
768 |
> |
register LIBR *lp; |
769 |
> |
|
770 |
> |
if (ep->type != VAR) |
771 |
> |
return(0); |
772 |
> |
if ((dp = ep->v.ln->def) != NULL) |
773 |
> |
if (dp->v.kid->type == FUNC) |
774 |
> |
return(dp->type == ':'); |
775 |
> |
else |
776 |
> |
return(0); /* don't identify masked library functions */ |
777 |
> |
if ((lp = ep->v.ln->lib) != NULL) |
778 |
> |
return(lp->atyp == ':'); |
779 |
> |
return(0); |
780 |
> |
} |