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Comparing ray/src/common/calfunc.c (file contents):
Revision 1.3 by greg, Sat Sep 29 11:18:34 1990 UTC vs.
Revision 2.14 by schorsch, Fri Nov 14 17:22:06 2003 UTC

# Line 1 | Line 1
1 – /* Copyright (c) 1986 Regents of the University of California */
2 –
1   #ifndef lint
2 < static char SCCSid[] = "$SunId$ LBL";
2 > static const char       RCSid[] = "$Id$";
3   #endif
6 –
4   /*
5   *  calfunc.c - routines for calcomp using functions.
6   *
7 < *      The define BIGLIB pulls in a large number of the
11 < *  available math routines.
12 < *
13 < *      If VARIABLE is not defined, only library functions
7 > *      If VARIABLE is not set, only library functions
8   *  can be accessed.
9   *
10 < *     4/2/86
10 > *  2/19/03     Eliminated conditional compiles in favor of esupport extern.
11   */
12  
13 < #include  <stdio.h>
13 > #include "copyright.h"
14  
15 + #include  <stdio.h>
16 + #include  <string.h>
17   #include  <errno.h>
18 + #include  <math.h>
19  
20 + #include  "rterror.h"
21   #include  "calcomp.h"
22  
23 <
23 >                                /* bits in argument flag (better be right!) */
24 > #define  AFLAGSIZ       (8*sizeof(unsigned long))
25   #define  ALISTSIZ       6       /* maximum saved argument list */
26  
27   typedef struct activation {
# Line 35 | Line 34 | typedef struct activation {
34  
35   static ACTIVATION  *curact = NULL;
36  
37 < static double  libfunc();
37 > static double  libfunc(char *fname, VARDEF *vp);
38  
39 + #ifndef  MAXLIB
40   #define  MAXLIB         64      /* maximum number of library functions */
41 –
42 – static double  l_if(), l_select(), l_rand();
43 – static double  l_floor(), l_ceil();
44 – #ifdef  BIGLIB
45 – static double  l_sqrt();
46 – static double  l_sin(), l_cos(), l_tan();
47 – static double  l_asin(), l_acos(), l_atan(), l_atan2();
48 – static double  l_exp(), l_log(), l_log10();
41   #endif
42  
43 < #ifdef  BIGLIB
43 > static double  l_if(char *), l_select(char *), l_rand(char *);
44 > static double  l_floor(char *), l_ceil(char *);
45 > static double  l_sqrt(char *);
46 > static double  l_sin(char *), l_cos(char *), l_tan(char *);
47 > static double  l_asin(char *), l_acos(char *), l_atan(char *), l_atan2(char *);
48 > static double  l_exp(char *), l_log(char *), l_log10(char *);
49 >
50                          /* functions must be listed alphabetically */
51   static LIBR  library[MAXLIB] = {
52 <    { "acos", 1, l_acos },
53 <    { "asin", 1, l_asin },
54 <    { "atan", 1, l_atan },
55 <    { "atan2", 2, l_atan2 },
56 <    { "ceil", 1, l_ceil },
57 <    { "cos", 1, l_cos },
58 <    { "exp", 1, l_exp },
59 <    { "floor", 1, l_floor },
60 <    { "if", 3, l_if },
61 <    { "log", 1, l_log },
62 <    { "log10", 1, l_log10 },
63 <    { "rand", 1, l_rand },
64 <    { "select", 1, l_select },
65 <    { "sin", 1, l_sin },
66 <    { "sqrt", 1, l_sqrt },
67 <    { "tan", 1, l_tan },
52 >    { "acos", 1, ':', l_acos },
53 >    { "asin", 1, ':', l_asin },
54 >    { "atan", 1, ':', l_atan },
55 >    { "atan2", 2, ':', l_atan2 },
56 >    { "ceil", 1, ':', l_ceil },
57 >    { "cos", 1, ':', l_cos },
58 >    { "exp", 1, ':', l_exp },
59 >    { "floor", 1, ':', l_floor },
60 >    { "if", 3, ':', l_if },
61 >    { "log", 1, ':', l_log },
62 >    { "log10", 1, ':', l_log10 },
63 >    { "rand", 1, ':', l_rand },
64 >    { "select", 1, ':', l_select },
65 >    { "sin", 1, ':', l_sin },
66 >    { "sqrt", 1, ':', l_sqrt },
67 >    { "tan", 1, ':', l_tan },
68   };
69  
70   static int  libsize = 16;
71  
74 – #else
75 –                        /* functions must be listed alphabetically */
76 – static LIBR  library[MAXLIB] = {
77 –    { "ceil", 1, l_ceil },
78 –    { "floor", 1, l_floor },
79 –    { "if", 3, l_if },
80 –    { "rand", 1, l_rand },
81 –    { "select", 1, l_select },
82 – };
83 –
84 – static int  libsize = 5;
85 –
86 – #endif
87 –
88 – extern char  *savestr(), *emalloc();
89 –
90 – extern LIBR  *liblookup();
91 –
92 – extern VARDEF  *argf();
93 –
94 – #ifdef  VARIABLE
72   #define  resolve(ep)    ((ep)->type==VAR?(ep)->v.ln:argf((ep)->v.chan))
96 – #else
97 – #define  resolve(ep)    ((ep)->v.ln)
98 – #define varlookup(name) NULL
99 – #endif
73  
74  
75   int
76   fundefined(fname)               /* return # of arguments for function */
77   char  *fname;
78   {
79 <    LIBR  *lp;
79 >    register LIBR  *lp;
80      register VARDEF  *vp;
81  
82 <    if ((vp = varlookup(fname)) == NULL || vp->def == NULL
83 <                || vp->def->v.kid->type != FUNC)
111 <        if ((lp = liblookup(fname)) == NULL)
112 <            return(0);
113 <        else
114 <            return(lp->nargs);
115 <    else
82 >    if ((vp = varlookup(fname)) != NULL && vp->def != NULL
83 >                && vp->def->v.kid->type == FUNC)
84          return(nekids(vp->def->v.kid) - 1);
85 +    lp = vp != NULL ? vp->lib : liblookup(fname);
86 +    if (lp == NULL)
87 +        return(0);
88 +    return(lp->nargs);
89   }
90  
91  
# Line 130 | Line 102 | double  *a;
102      act.name = fname;
103      act.prev = curact;
104      act.ap = a;
105 <    act.an = (1L<<n)-1;
105 >    if (n >= AFLAGSIZ)
106 >        act.an = ~0;
107 >    else
108 >        act.an = (1L<<n)-1;
109      act.fun = NULL;
110      curact = &act;
111  
# Line 145 | Line 120 | double  *a;
120   }
121  
122  
123 < funset(fname, nargs, fptr)              /* set a library function */
123 > void
124 > funset(fname, nargs, assign, fptr)      /* set a library function */
125   char  *fname;
126   int  nargs;
127 < double  (*fptr)();
127 > int  assign;
128 > double  (*fptr)(char *);
129   {
130 +    int  oldlibsize = libsize;
131 +    char *cp;
132      register LIBR  *lp;
133 <
134 <    if ((lp = liblookup(fname)) == NULL) {
133 >                                                /* check for context */
134 >    for (cp = fname; *cp; cp++)
135 >        ;
136 >    if (cp == fname)
137 >        return;
138 >    if (cp[-1] == CNTXMARK)
139 >        *--cp = '\0';
140 >    if ((lp = liblookup(fname)) == NULL) {      /* insert */
141          if (libsize >= MAXLIB) {
142              eputs("Too many library functons!\n");
143              quit(1);
# Line 161 | Line 146 | double  (*fptr)();
146              if (strcmp(lp[-1].fname, fname) > 0) {
147                  lp[0].fname = lp[-1].fname;
148                  lp[0].nargs = lp[-1].nargs;
149 +                lp[0].atyp = lp[-1].atyp;
150                  lp[0].f = lp[-1].f;
151              } else
152                  break;
153          libsize++;
154      }
155 <    lp[0].fname = savestr(fname);
156 <    lp[0].nargs = nargs;
157 <    lp[0].f = fptr;
155 >    if (fptr == NULL) {                         /* delete */
156 >        while (lp < &library[libsize-1]) {
157 >            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;
161 >            lp++;
162 >        }
163 >        libsize--;
164 >    } else {                                    /* or assign */
165 >        lp[0].fname = fname;            /* string must be static! */
166 >        lp[0].nargs = nargs;
167 >        lp[0].atyp = assign;
168 >        lp[0].f = fptr;
169 >    }
170 >    if (libsize != oldlibsize)
171 >        libupdate(fname);                       /* relink library */
172   }
173  
174  
# Line 193 | Line 193 | argument(n)                    /* return nth argument for active functi
193   register int  n;
194   {
195      register ACTIVATION  *actp = curact;
196 <    EPNODE  *ep;
196 >    register EPNODE  *ep = NULL;
197      double  aval;
198  
199      if (actp == NULL || --n < 0) {
# Line 201 | Line 201 | register int  n;
201          quit(1);
202      }
203                                                  /* already computed? */
204 <    if (1L<<n & actp->an)
204 >    if (n < AFLAGSIZ && 1L<<n & actp->an)
205          return(actp->ap[n]);
206  
207      if (actp->fun == NULL || (ep = ekid(actp->fun, n+1)) == NULL) {
# Line 220 | Line 220 | register int  n;
220   }
221  
222  
223 – #ifdef  VARIABLE
223   VARDEF *
224   argf(n)                         /* return function def for nth argument */
225   int  n;
# Line 256 | Line 255 | badarg:
255      eputs(actp->name);
256      eputs(": argument not a function\n");
257      quit(1);
258 +        return NULL; /* pro forma return */
259   }
260  
261  
# Line 265 | Line 265 | int  n;
265   {
266      return(argf(n)->name);
267   }
268 – #endif
268  
269  
270   double
# Line 319 | Line 318 | char  *fname;
318   }
319  
320  
322 – #ifndef  VARIABLE
323 – VARDEF *
324 – varinsert(vname)                /* dummy variable insert */
325 – char  *vname;
326 – {
327 –    register VARDEF  *vp;
328 –
329 –    vp = (VARDEF *)emalloc(sizeof(VARDEF));
330 –    vp->name = savestr(vname);
331 –    vp->nlinks = 1;
332 –    vp->def = NULL;
333 –    vp->lib = NULL;
334 –    vp->next = NULL;
335 –    return(vp);
336 – }
337 –
338 –
339 – varfree(vp)                     /* free dummy variable */
340 – register VARDEF  *vp;
341 – {
342 –    freestr(vp->name);
343 –    efree((char *)vp);
344 – }
345 – #endif
346 –
347 –
348 –
321   /*
322   *  The following routines are for internal use:
323   */
# Line 354 | Line 326 | register VARDEF  *vp;
326   static double
327   libfunc(fname, vp)                      /* execute library function */
328   char  *fname;
329 < register VARDEF  *vp;
329 > VARDEF  *vp;
330   {
331 <    VARDEF  dumdef;
331 >    register LIBR  *lp;
332      double  d;
333      int  lasterrno;
334  
335 <    if (vp == NULL) {
336 <        vp = &dumdef;
337 <        vp->lib = NULL;
338 <    }
339 <    if (((vp->lib == NULL || strcmp(fname, vp->lib->fname)) &&
368 <                                (vp->lib = liblookup(fname)) == NULL) ||
369 <                vp->lib->f == NULL) {
335 >    if (vp != NULL)
336 >        lp = vp->lib;
337 >    else
338 >        lp = liblookup(fname);
339 >    if (lp == NULL) {
340          eputs(fname);
341          eputs(": undefined function\n");
342          quit(1);
343      }
344      lasterrno = errno;
345      errno = 0;
346 <    d = (*vp->lib->f)();
346 >    d = (*lp->f)(lp->fname);
347   #ifdef  IEEE
348 <    if (!finite(d))
349 <        errno = EDOM;
348 >    if (errno == 0)
349 >        if (isnan(d))
350 >            errno = EDOM;
351 >        else if (isinf(d))
352 >            errno = ERANGE;
353   #endif
354 <    if (errno) {
354 >    if (errno == EDOM || errno == ERANGE) {
355          wputs(fname);
356 <        wputs(": bad call\n");
356 >        if (errno == EDOM)
357 >                wputs(": domain error\n");
358 >        else if (errno == ERANGE)
359 >                wputs(": range error\n");
360 >        else
361 >                wputs(": error in call\n");
362          return(0.0);
363      }
364      errno = lasterrno;
# Line 394 | Line 372 | register VARDEF  *vp;
372  
373  
374   static double
375 < l_if()                  /* if(cond, then, else) conditional expression */
375 > l_if(char *nm)          /* if(cond, then, else) conditional expression */
376                          /* cond evaluates true if greater than zero */
377   {
378      if (argument(1) > 0.0)
# Line 405 | Line 383 | l_if()                 /* if(cond, then, else) conditional expressio
383  
384  
385   static double
386 < l_select()              /* return argument #(A1+1) */
386 > l_select(char *nm)      /* return argument #(A1+1) */
387   {
388          register int  n;
389  
390 <        n = argument(1) + .5;
390 >        n = (int)(argument(1) + .5);
391          if (n == 0)
392                  return(nargum()-1);
393          if (n < 1 || n > nargum()-1) {
# Line 421 | Line 399 | l_select()             /* return argument #(A1+1) */
399  
400  
401   static double
402 < l_rand()                /* random function between 0 and 1 */
402 > l_rand(char *nm)                /* random function between 0 and 1 */
403   {
426 –    extern double  floor();
404      double  x;
405  
406      x = argument(1);
# Line 435 | Line 412 | l_rand()               /* random function between 0 and 1 */
412  
413  
414   static double
415 < l_floor()               /* return largest integer not greater than arg1 */
415 > l_floor(char *nm)               /* return largest integer not greater than arg1 */
416   {
440 –    extern double  floor();
441 –
417      return(floor(argument(1)));
418   }
419  
420  
421   static double
422 < l_ceil()                /* return smallest integer not less than arg1 */
422 > l_ceil(char *nm)                /* return smallest integer not less than arg1 */
423   {
449 –    extern double  ceil();
450 –
424      return(ceil(argument(1)));
425   }
426  
427  
455 – #ifdef  BIGLIB
428   static double
429 < l_sqrt()
429 > l_sqrt(char *nm)
430   {
459 –    extern double  sqrt();
460 –
431      return(sqrt(argument(1)));
432   }
433  
434  
435   static double
436 < l_sin()
436 > l_sin(char *nm)
437   {
468 –    extern double  sin();
469 –
438      return(sin(argument(1)));
439   }
440  
441  
442   static double
443 < l_cos()
443 > l_cos(char *nm)
444   {
477 –    extern double  cos();
478 –
445      return(cos(argument(1)));
446   }
447  
448  
449   static double
450 < l_tan()
450 > l_tan(char *nm)
451   {
486 –    extern double  tan();
487 –
452      return(tan(argument(1)));
453   }
454  
455  
456   static double
457 < l_asin()
457 > l_asin(char *nm)
458   {
495 –    extern double  asin();
496 –
459      return(asin(argument(1)));
460   }
461  
462  
463   static double
464 < l_acos()
464 > l_acos(char *nm)
465   {
504 –    extern double  acos();
505 –
466      return(acos(argument(1)));
467   }
468  
469  
470   static double
471 < l_atan()
471 > l_atan(char *nm)
472   {
513 –    extern double  atan();
514 –
473      return(atan(argument(1)));
474   }
475  
476  
477   static double
478 < l_atan2()
478 > l_atan2(char *nm)
479   {
522 –    extern double  atan2();
523 –
480      return(atan2(argument(1), argument(2)));
481   }
482  
483  
484   static double
485 < l_exp()
485 > l_exp(char *nm)
486   {
531 –    extern double  exp();
532 –
487      return(exp(argument(1)));
488   }
489  
490  
491   static double
492 < l_log()
492 > l_log(char *nm)
493   {
540 –    extern double  log();
541 –
494      return(log(argument(1)));
495   }
496  
497  
498   static double
499 < l_log10()
499 > l_log10(char *nm)
500   {
549 –    extern double  log10();
550 –
501      return(log10(argument(1)));
502   }
553 – #endif

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