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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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/* bits in argument flag (better be right!) */ |
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#define AFLAGSIZ (8*sizeof(unsigned long)) |
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#define ALISTSIZ 6 /* maximum saved argument list */ |
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typedef struct activation { |
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extern char *savestr(), *emalloc(); |
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extern LIBR *liblookup(); |
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extern VARDEF *argf(); |
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#ifdef VARIABLE |
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act.name = fname; |
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act.prev = curact; |
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act.ap = a; |
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act.an = (1L<<n)-1; |
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if (n >= AFLAGSIZ) |
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act.an = ~0; |
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else |
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act.an = (1L<<n)-1; |
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act.fun = NULL; |
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curact = &act; |
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{ |
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register LIBR *lp; |
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if ((lp = liblookup(fname)) == NULL) { |
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if ((lp = liblookup(fname)) == NULL) { /* insert */ |
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if (libsize >= MAXLIB) { |
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eputs("Too many library functons!\n"); |
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quit(1); |
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break; |
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libsize++; |
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} |
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lp[0].fname = savestr(fname); |
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lp[0].nargs = nargs; |
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lp[0].atyp = assign; |
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lp[0].f = fptr; |
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if (fptr == NULL) { /* delete */ |
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while (lp < &library[libsize-1]) { |
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lp[0].fname = lp[1].fname; |
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lp[0].nargs = lp[1].nargs; |
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lp[0].atyp = lp[1].atyp; |
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lp[0].f = lp[1].f; |
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lp++; |
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} |
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libsize--; |
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} else { /* or assign */ |
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lp[0].fname = fname; /* string must be static! */ |
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lp[0].nargs = nargs; |
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lp[0].atyp = assign; |
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lp[0].f = fptr; |
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} |
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libupdate(fname); /* relink library */ |
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} |
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register int n; |
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{ |
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register ACTIVATION *actp = curact; |
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EPNODE *ep; |
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register EPNODE *ep; |
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double aval; |
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if (actp == NULL || --n < 0) { |
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quit(1); |
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} |
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/* already computed? */ |
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if (1L<<n & actp->an) |
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if (n < AFLAGSIZ && 1L<<n & actp->an) |
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return(actp->ap[n]); |
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if (actp->fun == NULL || (ep = ekid(actp->fun, n+1)) == NULL) { |
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static double |
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libfunc(fname, vp) /* execute library function */ |
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char *fname; |
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register VARDEF *vp; |
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VARDEF *vp; |
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{ |
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VARDEF dumdef; |
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register LIBR *lp; |
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double d; |
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int lasterrno; |
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if (vp == NULL) { |
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vp = &dumdef; |
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vp->lib = NULL; |
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} |
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if (((vp->lib == NULL || strcmp(fname, vp->lib->fname)) && |
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(vp->lib = liblookup(fname)) == NULL) || |
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vp->lib->f == NULL) { |
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if (vp != NULL) |
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lp = vp->lib; |
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else |
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lp = liblookup(fname); |
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if (lp == NULL) { |
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eputs(fname); |
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eputs(": undefined function\n"); |
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quit(1); |
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} |
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lasterrno = errno; |
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errno = 0; |
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d = (*vp->lib->f)(); |
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d = (*lp->f)(lp->fname); |
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#ifdef IEEE |
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if (!finite(d)) |
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errno = EDOM; |
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if (errno == 0) |
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if (isnan(d)) |
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errno = EDOM; |
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else if (isinf(d)) |
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errno = ERANGE; |
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#endif |
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if (errno) { |
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wputs(fname); |
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wputs(": bad call\n"); |
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if (errno == EDOM) |
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wputs(": domain error\n"); |
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else if (errno == ERANGE) |
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wputs(": range error\n"); |
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else |
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wputs(": error in call\n"); |
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return(0.0); |
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} |
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errno = lasterrno; |
