22 |
|
|
23 |
|
/* bits in argument flag (better be right!) */ |
24 |
|
#define AFLAGSIZ (8*sizeof(unsigned long)) |
25 |
< |
#define ALISTSIZ 6 /* maximum saved argument list */ |
25 |
> |
#define ALISTSIZ 8 /* maximum saved argument list */ |
26 |
|
|
27 |
|
typedef struct activation { |
28 |
|
char *name; /* function name */ |
40 |
|
#define MAXLIB 64 /* maximum number of library functions */ |
41 |
|
#endif |
42 |
|
|
43 |
< |
static double l_if(char *), l_select(char *), l_rand(char *); |
43 |
> |
static double l_if(char *), l_select(char *); |
44 |
> |
static double l_min(char *), l_max(char *); |
45 |
> |
static double l_rand(char *); |
46 |
|
static double l_floor(char *), l_ceil(char *); |
47 |
|
static double l_sqrt(char *); |
48 |
|
static double l_sin(char *), l_cos(char *), l_tan(char *); |
62 |
|
{ "if", 3, ':', l_if }, |
63 |
|
{ "log", 1, ':', l_log }, |
64 |
|
{ "log10", 1, ':', l_log10 }, |
65 |
+ |
{ "max", 1, ':', l_max }, |
66 |
+ |
{ "min", 1, ':', l_min }, |
67 |
|
{ "rand", 1, ':', l_rand }, |
68 |
|
{ "select", 1, ':', l_select }, |
69 |
|
{ "sin", 1, ':', l_sin }, |
71 |
|
{ "tan", 1, ':', l_tan }, |
72 |
|
}; |
73 |
|
|
74 |
< |
static int libsize = 16; |
74 |
> |
static int libsize = 18; |
75 |
|
|
76 |
|
#define resolve(ep) ((ep)->type==VAR?(ep)->v.ln:argf((ep)->v.chan)) |
77 |
|
|
78 |
|
|
79 |
|
int |
80 |
< |
fundefined(fname) /* return # of arguments for function */ |
81 |
< |
char *fname; |
80 |
> |
fundefined( /* return # of req'd arguments for function */ |
81 |
> |
char *fname |
82 |
> |
) |
83 |
|
{ |
84 |
< |
register LIBR *lp; |
85 |
< |
register VARDEF *vp; |
84 |
> |
LIBR *lp; |
85 |
> |
VARDEF *vp; |
86 |
|
|
87 |
|
if ((vp = varlookup(fname)) != NULL && vp->def != NULL |
88 |
|
&& vp->def->v.kid->type == FUNC) |
95 |
|
|
96 |
|
|
97 |
|
double |
98 |
< |
funvalue(fname, n, a) /* return a function value to the user */ |
99 |
< |
char *fname; |
100 |
< |
int n; |
101 |
< |
double *a; |
98 |
> |
funvalue( /* return a function value to the user */ |
99 |
> |
char *fname, |
100 |
> |
int n, |
101 |
> |
double *a |
102 |
> |
) |
103 |
|
{ |
104 |
|
ACTIVATION act; |
105 |
< |
register VARDEF *vp; |
105 |
> |
VARDEF *vp; |
106 |
|
double rval; |
107 |
|
/* push environment */ |
108 |
|
act.name = fname; |
109 |
|
act.prev = curact; |
110 |
|
act.ap = a; |
111 |
< |
if (n >= AFLAGSIZ) |
106 |
< |
act.an = ~0; |
107 |
< |
else |
111 |
> |
if (n < AFLAGSIZ) |
112 |
|
act.an = (1L<<n)-1; |
113 |
+ |
else { |
114 |
+ |
act.an = ~0; |
115 |
+ |
if (n > AFLAGSIZ) |
116 |
+ |
wputs("Excess arguments in funvalue()\n"); |
117 |
+ |
} |
118 |
|
act.fun = NULL; |
119 |
|
curact = &act; |
120 |
|
|
130 |
|
|
131 |
|
|
132 |
|
void |
133 |
< |
funset(fname, nargs, assign, fptr) /* set a library function */ |
134 |
< |
char *fname; |
135 |
< |
int nargs; |
136 |
< |
int assign; |
137 |
< |
double (*fptr)(char *); |
133 |
> |
funset( /* set a library function */ |
134 |
> |
char *fname, |
135 |
> |
int nargs, |
136 |
> |
int assign, |
137 |
> |
double (*fptr)(char *) |
138 |
> |
) |
139 |
|
{ |
140 |
|
int oldlibsize = libsize; |
141 |
|
char *cp; |
142 |
< |
register LIBR *lp; |
142 |
> |
LIBR *lp; |
143 |
|
/* check for context */ |
144 |
|
for (cp = fname; *cp; cp++) |
145 |
|
; |
146 |
|
if (cp == fname) |
147 |
|
return; |
148 |
< |
if (cp[-1] == CNTXMARK) |
148 |
> |
while (cp[-1] == CNTXMARK) { |
149 |
|
*--cp = '\0'; |
150 |
+ |
if (cp == fname) return; |
151 |
+ |
} |
152 |
|
if ((lp = liblookup(fname)) == NULL) { /* insert */ |
153 |
|
if (libsize >= MAXLIB) { |
154 |
|
eputs("Too many library functons!\n"); |
155 |
|
quit(1); |
156 |
|
} |
157 |
|
for (lp = &library[libsize]; lp > library; lp--) |
158 |
< |
if (strcmp(lp[-1].fname, fname) > 0) { |
159 |
< |
lp[0].fname = lp[-1].fname; |
160 |
< |
lp[0].nargs = lp[-1].nargs; |
149 |
< |
lp[0].atyp = lp[-1].atyp; |
150 |
< |
lp[0].f = lp[-1].f; |
151 |
< |
} else |
158 |
> |
if (strcmp(lp[-1].fname, fname) > 0) |
159 |
> |
lp[0] = lp[-1]; |
160 |
> |
else |
161 |
|
break; |
162 |
|
libsize++; |
163 |
|
} |
164 |
|
if (fptr == NULL) { /* delete */ |
165 |
|
while (lp < &library[libsize-1]) { |
166 |
< |
lp[0].fname = lp[1].fname; |
158 |
< |
lp[0].nargs = lp[1].nargs; |
159 |
< |
lp[0].atyp = lp[1].atyp; |
160 |
< |
lp[0].f = lp[1].f; |
166 |
> |
lp[0] = lp[1]; |
167 |
|
lp++; |
168 |
|
} |
169 |
|
libsize--; |
179 |
|
|
180 |
|
|
181 |
|
int |
182 |
< |
nargum() /* return number of available arguments */ |
182 |
> |
nargum(void) /* return number of available arguments */ |
183 |
|
{ |
184 |
< |
register int n; |
184 |
> |
int n; |
185 |
|
|
186 |
|
if (curact == NULL) |
187 |
|
return(0); |
195 |
|
|
196 |
|
|
197 |
|
double |
198 |
< |
argument(n) /* return nth argument for active function */ |
193 |
< |
register int n; |
198 |
> |
argument(int n) /* return nth argument for active function */ |
199 |
|
{ |
200 |
< |
register ACTIVATION *actp = curact; |
201 |
< |
register EPNODE *ep = NULL; |
200 |
> |
ACTIVATION *actp = curact; |
201 |
> |
EPNODE *ep = NULL; |
202 |
|
double aval; |
203 |
|
|
204 |
< |
if (actp == NULL || --n < 0) { |
204 |
> |
if (!n) /* asking for # arguments? */ |
205 |
> |
return((double)nargum()); |
206 |
> |
|
207 |
> |
if (!actp | (--n < 0)) { |
208 |
|
eputs("Bad call to argument!\n"); |
209 |
|
quit(1); |
210 |
|
} |
211 |
< |
/* already computed? */ |
204 |
< |
if (n < AFLAGSIZ && 1L<<n & actp->an) |
211 |
> |
if ((n < AFLAGSIZ) & actp->an >> n) /* already computed? */ |
212 |
|
return(actp->ap[n]); |
213 |
|
|
214 |
< |
if (actp->fun == NULL || (ep = ekid(actp->fun, n+1)) == NULL) { |
214 |
> |
if (!actp->fun || !(ep = ekid(actp->fun, n+1))) { |
215 |
|
eputs(actp->name); |
216 |
|
eputs(": too few arguments\n"); |
217 |
|
quit(1); |
218 |
|
} |
219 |
< |
curact = actp->prev; /* pop environment */ |
219 |
> |
curact = actp->prev; /* previous context */ |
220 |
|
aval = evalue(ep); /* compute argument */ |
221 |
< |
curact = actp; /* push back environment */ |
222 |
< |
if (n < ALISTSIZ) { /* save value */ |
221 |
> |
curact = actp; /* put back calling context */ |
222 |
> |
if (n < ALISTSIZ) { /* save value if room */ |
223 |
|
actp->ap[n] = aval; |
224 |
|
actp->an |= 1L<<n; |
225 |
|
} |
228 |
|
|
229 |
|
|
230 |
|
VARDEF * |
231 |
< |
argf(n) /* return function def for nth argument */ |
225 |
< |
int n; |
231 |
> |
argf(int n) /* return function def for nth argument */ |
232 |
|
{ |
233 |
< |
register ACTIVATION *actp; |
234 |
< |
register EPNODE *ep; |
233 |
> |
ACTIVATION *actp; |
234 |
> |
EPNODE *ep; |
235 |
|
|
236 |
|
for (actp = curact; actp != NULL; actp = actp->prev) { |
237 |
|
|
266 |
|
|
267 |
|
|
268 |
|
char * |
269 |
< |
argfun(n) /* return function name for nth argument */ |
264 |
< |
int n; |
269 |
> |
argfun(int n) /* return function name for nth argument */ |
270 |
|
{ |
271 |
|
return(argf(n)->name); |
272 |
|
} |
273 |
|
|
274 |
|
|
275 |
|
double |
276 |
< |
efunc(ep) /* evaluate a function */ |
272 |
< |
register EPNODE *ep; |
276 |
> |
efunc(EPNODE *ep) /* evaluate a function */ |
277 |
|
{ |
278 |
|
ACTIVATION act; |
279 |
|
double alist[ALISTSIZ]; |
280 |
|
double rval; |
281 |
< |
register VARDEF *dp; |
281 |
> |
VARDEF *dp; |
282 |
|
/* push environment */ |
283 |
|
dp = resolve(ep->v.kid); |
284 |
|
act.name = dp->name; |
299 |
|
|
300 |
|
|
301 |
|
LIBR * |
302 |
< |
liblookup(fname) /* look up a library function */ |
299 |
< |
char *fname; |
302 |
> |
liblookup(char *fname) /* look up a library function */ |
303 |
|
{ |
304 |
|
int upper, lower; |
305 |
< |
register int cm, i; |
305 |
> |
int cm, i; |
306 |
|
|
307 |
|
lower = 0; |
308 |
|
upper = cm = libsize; |
327 |
|
|
328 |
|
|
329 |
|
static double |
330 |
< |
libfunc(fname, vp) /* execute library function */ |
331 |
< |
char *fname; |
332 |
< |
VARDEF *vp; |
330 |
> |
libfunc( /* execute library function */ |
331 |
> |
char *fname, |
332 |
> |
VARDEF *vp |
333 |
> |
) |
334 |
|
{ |
335 |
< |
register LIBR *lp; |
335 |
> |
LIBR *lp; |
336 |
|
double d; |
337 |
|
int lasterrno; |
338 |
|
|
349 |
|
errno = 0; |
350 |
|
d = (*lp->f)(lp->fname); |
351 |
|
#ifdef isnan |
352 |
< |
if (errno == 0) |
352 |
> |
if (errno == 0) { |
353 |
|
if (isnan(d)) |
354 |
|
errno = EDOM; |
355 |
|
else if (isinf(d)) |
356 |
|
errno = ERANGE; |
357 |
+ |
} |
358 |
|
#endif |
359 |
|
if (errno == EDOM || errno == ERANGE) { |
360 |
|
wputs(fname); |
390 |
|
static double |
391 |
|
l_select(char *nm) /* return argument #(A1+1) */ |
392 |
|
{ |
393 |
< |
register int n; |
393 |
> |
int n; |
394 |
|
|
395 |
|
n = (int)(argument(1) + .5); |
396 |
|
if (n == 0) |
400 |
|
return(0.0); |
401 |
|
} |
402 |
|
return(argument(n+1)); |
403 |
+ |
} |
404 |
+ |
|
405 |
+ |
|
406 |
+ |
static double |
407 |
+ |
l_max(char *nm) /* general maximum function */ |
408 |
+ |
{ |
409 |
+ |
int n = nargum(); |
410 |
+ |
int i = 1; |
411 |
+ |
int vmax = argument(1); |
412 |
+ |
|
413 |
+ |
while (i++ < n) { |
414 |
+ |
double v = argument(i); |
415 |
+ |
if (vmax < v) |
416 |
+ |
vmax = v; |
417 |
+ |
} |
418 |
+ |
return(vmax); |
419 |
+ |
} |
420 |
+ |
|
421 |
+ |
|
422 |
+ |
static double |
423 |
+ |
l_min(char *nm) /* general minimum function */ |
424 |
+ |
{ |
425 |
+ |
int n = nargum(); |
426 |
+ |
int i = 1; |
427 |
+ |
int vmin = argument(1); |
428 |
+ |
|
429 |
+ |
while (i++ < n) { |
430 |
+ |
double v = argument(i); |
431 |
+ |
if (vmin > v) |
432 |
+ |
vmin = v; |
433 |
+ |
} |
434 |
+ |
return(vmin); |
435 |
|
} |
436 |
|
|
437 |
|
|