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#include "copyright.h" |
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#include <stdio.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <math.h> |
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#include "rterror.h" |
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#include "calcomp.h" |
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/* bits in argument flag (better be right!) */ |
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static ACTIVATION *curact = NULL; |
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static double libfunc(); |
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static double libfunc(char *fname, VARDEF *vp); |
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#ifndef MAXLIB |
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#define MAXLIB 64 /* maximum number of library functions */ |
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#endif |
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static double l_if(), l_select(), l_rand(); |
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static double l_floor(), l_ceil(); |
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static double l_sqrt(); |
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static double l_sin(), l_cos(), l_tan(); |
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static double l_asin(), l_acos(), l_atan(), l_atan2(); |
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static double l_exp(), l_log(), l_log10(); |
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static double l_if(char *), l_select(char *), l_rand(char *); |
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static double l_floor(char *), l_ceil(char *); |
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static double l_sqrt(char *); |
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static double l_sin(char *), l_cos(char *), l_tan(char *); |
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static double l_asin(char *), l_acos(char *), l_atan(char *), l_atan2(char *); |
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static double l_exp(char *), l_log(char *), l_log10(char *); |
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/* functions must be listed alphabetically */ |
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static LIBR library[MAXLIB] = { |
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int |
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fundefined(fname) /* return # of arguments for function */ |
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char *fname; |
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fundefined( /* return # of arguments for function */ |
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char *fname |
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) |
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{ |
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register LIBR *lp; |
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register VARDEF *vp; |
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LIBR *lp; |
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VARDEF *vp; |
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if ((vp = varlookup(fname)) != NULL && vp->def != NULL |
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&& vp->def->v.kid->type == FUNC) |
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double |
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funvalue(fname, n, a) /* return a function value to the user */ |
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char *fname; |
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int n; |
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double *a; |
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funvalue( /* return a function value to the user */ |
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char *fname, |
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int n, |
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double *a |
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) |
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{ |
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ACTIVATION act; |
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register VARDEF *vp; |
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VARDEF *vp; |
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double rval; |
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/* push environment */ |
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act.name = fname; |
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void |
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funset(fname, nargs, assign, fptr) /* set a library function */ |
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char *fname; |
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int nargs; |
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int assign; |
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double (*fptr)(); |
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funset( /* set a library function */ |
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char *fname, |
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int nargs, |
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int assign, |
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double (*fptr)(char *) |
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) |
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{ |
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int oldlibsize = libsize; |
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char *cp; |
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register LIBR *lp; |
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LIBR *lp; |
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/* check for context */ |
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for (cp = fname; *cp; cp++) |
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; |
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int |
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nargum() /* return number of available arguments */ |
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nargum(void) /* return number of available arguments */ |
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{ |
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register int n; |
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int n; |
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if (curact == NULL) |
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return(0); |
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double |
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argument(n) /* return nth argument for active function */ |
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register int n; |
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argument(int n) /* return nth argument for active function */ |
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{ |
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register ACTIVATION *actp = curact; |
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register EPNODE *ep; |
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ACTIVATION *actp = curact; |
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EPNODE *ep = NULL; |
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double aval; |
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if (actp == NULL || --n < 0) { |
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VARDEF * |
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argf(n) /* return function def for nth argument */ |
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int n; |
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argf(int n) /* return function def for nth argument */ |
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{ |
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register ACTIVATION *actp; |
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register EPNODE *ep; |
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ACTIVATION *actp; |
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EPNODE *ep; |
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for (actp = curact; actp != NULL; actp = actp->prev) { |
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eputs(actp->name); |
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eputs(": argument not a function\n"); |
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quit(1); |
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return NULL; /* pro forma return */ |
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} |
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char * |
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argfun(n) /* return function name for nth argument */ |
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int n; |
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argfun(int n) /* return function name for nth argument */ |
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{ |
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return(argf(n)->name); |
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} |
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double |
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efunc(ep) /* evaluate a function */ |
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register EPNODE *ep; |
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efunc(EPNODE *ep) /* evaluate a function */ |
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{ |
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ACTIVATION act; |
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double alist[ALISTSIZ]; |
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double rval; |
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register VARDEF *dp; |
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VARDEF *dp; |
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/* push environment */ |
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dp = resolve(ep->v.kid); |
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act.name = dp->name; |
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LIBR * |
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liblookup(fname) /* look up a library function */ |
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char *fname; |
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liblookup(char *fname) /* look up a library function */ |
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{ |
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int upper, lower; |
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register int cm, i; |
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int cm, i; |
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lower = 0; |
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upper = cm = libsize; |
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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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VARDEF *vp; |
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libfunc( /* execute library function */ |
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char *fname, |
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VARDEF *vp |
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) |
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{ |
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register LIBR *lp; |
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LIBR *lp; |
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double d; |
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int lasterrno; |
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lasterrno = errno; |
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errno = 0; |
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d = (*lp->f)(lp->fname); |
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#ifdef IEEE |
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#ifdef isnan |
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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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if (errno == EDOM || errno == ERANGE) { |
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wputs(fname); |
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if (errno == EDOM) |
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wputs(": domain error\n"); |
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static double |
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l_if() /* if(cond, then, else) conditional expression */ |
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l_if(char *nm) /* if(cond, then, else) conditional expression */ |
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/* cond evaluates true if greater than zero */ |
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if (argument(1) > 0.0) |
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static double |
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l_select() /* return argument #(A1+1) */ |
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l_select(char *nm) /* return argument #(A1+1) */ |
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{ |
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register int n; |
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int n; |
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n = argument(1) + .5; |
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n = (int)(argument(1) + .5); |
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if (n == 0) |
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return(nargum()-1); |
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if (n < 1 || n > nargum()-1) { |
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static double |
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l_rand() /* random function between 0 and 1 */ |
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l_rand(char *nm) /* random function between 0 and 1 */ |
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{ |
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double x; |
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static double |
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l_floor() /* return largest integer not greater than arg1 */ |
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l_floor(char *nm) /* return largest integer not greater than arg1 */ |
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{ |
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return(floor(argument(1))); |
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} |
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static double |
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l_ceil() /* return smallest integer not less than arg1 */ |
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l_ceil(char *nm) /* return smallest integer not less than arg1 */ |
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{ |
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return(ceil(argument(1))); |
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} |
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static double |
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l_sqrt() |
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l_sqrt(char *nm) |
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{ |
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return(sqrt(argument(1))); |
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} |
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static double |
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l_sin() |
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l_sin(char *nm) |
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{ |
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return(sin(argument(1))); |
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} |
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static double |
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l_cos() |
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l_cos(char *nm) |
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{ |
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return(cos(argument(1))); |
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} |
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static double |
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l_tan() |
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l_tan(char *nm) |
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{ |
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return(tan(argument(1))); |
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} |
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static double |
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l_asin() |
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l_asin(char *nm) |
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{ |
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return(asin(argument(1))); |
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} |
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static double |
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l_acos() |
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l_acos(char *nm) |
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{ |
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return(acos(argument(1))); |
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} |
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static double |
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l_atan() |
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l_atan(char *nm) |
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{ |
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return(atan(argument(1))); |
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} |
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static double |
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l_atan2() |
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l_atan2(char *nm) |
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{ |
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return(atan2(argument(1), argument(2))); |
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} |
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static double |
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l_exp() |
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l_exp(char *nm) |
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{ |
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return(exp(argument(1))); |
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} |
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static double |
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l_log() |
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l_log(char *nm) |
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{ |
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return(log(argument(1))); |
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} |
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static double |
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l_log10() |
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l_log10(char *nm) |
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{ |
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return(log10(argument(1))); |
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} |