ViewVC Help
View File | Revision Log | Show Annotations | Download File | Root Listing
root/radiance/ray/src/meta/mgvars.c
Revision: 1.1
Committed: Sat Feb 22 02:07:26 2003 UTC (21 years, 9 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R5
Log Message:
Changes and check-in for 3.5 release
Includes new source files and modifications not recorded for many years
See ray/doc/notes/ReleaseNotes for notes between 3.1 and 3.5 release

File Contents

# User Rev Content
1 greg 1.1 #ifndef lint
2     static const char RCSid[] = "$Id$";
3     #endif
4     /*
5     * mgvars.c - routines dealing with graph variables.
6     *
7     * 6/23/86
8     *
9     * Greg Ward Larson
10     */
11    
12     #include <stdio.h>
13    
14     #include <stdlib.h>
15    
16     #include <math.h>
17    
18     #include <ctype.h>
19    
20     #include "mgvars.h"
21    
22     #define MAXLINE 512
23    
24     #define isid(c) (isalnum(c) || (c) == '_' || (c) == '.')
25    
26     #define isnum(c) (isdigit(c)||(c)=='-'||(c)=='+'||(c)=='.'||(c)=='e'||(c)=='E')
27    
28     char *findfile(), *emalloc(), *ecalloc(), *erealloc(), *savestr(), *strcpy();
29     FILE *fopen(), *popen();
30     extern char *progname, *libpath[];
31    
32     #ifdef DCL_ATOF
33     double atof();
34     #endif
35    
36     IVAR *ivhead = NULL; /* intermediate variables */
37    
38     VARIABLE gparam[NVARS] = { /* standard variables */
39     { "fthick", REAL, "frame thickness" },
40     { "grid", REAL, "grid on?" },
41     { "legend", STRING, "legend title" },
42     { "othick", REAL, "origin thickness" },
43     { "period", REAL, "period of polar plot" },
44     { "subtitle", STRING },
45     { "symfile", STRING, "symbol file" },
46     { "tstyle", REAL, "tick mark style" },
47     { "title", STRING },
48     { "xlabel", STRING },
49     { "xmap", FUNCTION, "x axis mapping function" },
50     { "xmax", REAL },
51     { "xmin", REAL },
52     { "xstep", REAL },
53     { "ylabel", STRING },
54     { "ymap", FUNCTION, "y axis mapping function" },
55     { "ymax", REAL },
56     { "ymin", REAL },
57     { "ystep", REAL },
58     };
59    
60     VARIABLE cparam[MAXCUR][NCVARS] = { /* curve variables */
61     {
62     { "A", FUNCTION, "function for curve A" },
63     { "Acolor", REAL, "color for A" },
64     { "Adata", DATA, "point data for A" },
65     { "Alabel", STRING },
66     { "Alintype", REAL, "line type for A" },
67     { "Anpoints", REAL, "number of points for A" },
68     { "Asymsize", REAL, "symbol size for A" },
69     { "Asymtype", STRING, "symbol type for A" },
70     { "Athick", REAL, "line thickness for A" },
71     }, {
72     { "B", FUNCTION, "function for curve B" },
73     { "Bcolor", REAL, "color for B" },
74     { "Bdata", DATA, "point data for B" },
75     { "Blabel", STRING },
76     { "Blintype", REAL, "line type for B" },
77     { "Bnpoints", REAL, "number of points for B" },
78     { "Bsymsize", REAL, "symbol size for B" },
79     { "Bsymtype", STRING, "symbol type for B" },
80     { "Bthick", REAL, "line thickness for B" },
81     }, {
82     { "C", FUNCTION, "function for curve C" },
83     { "Ccolor", REAL, "color for C" },
84     { "Cdata", DATA, "point data for C" },
85     { "Clabel", STRING },
86     { "Clintype", REAL, "line type for C" },
87     { "Cnpoints", REAL, "number of points for C" },
88     { "Csymsize", REAL, "symbol size for C" },
89     { "Csymtype", STRING, "symbol type for C" },
90     { "Cthick", REAL, "line thickness for C" },
91     }, {
92     { "D", FUNCTION, "function for curve D" },
93     { "Dcolor", REAL, "color for D" },
94     { "Ddata", DATA, "point data for D" },
95     { "Dlabel", STRING },
96     { "Dlintype", REAL, "line type for D" },
97     { "Dnpoints", REAL, "number of points for D" },
98     { "Dsymsize", REAL, "symbol size for D" },
99     { "Dsymtype", STRING, "symbol type for D" },
100     { "Dthick", REAL, "line thickness for D" },
101     }, {
102     { "E", FUNCTION, "function for curve E" },
103     { "Ecolor", REAL, "color for E" },
104     { "Edata", DATA, "point data for E" },
105     { "Elabel", STRING },
106     { "Elintype", REAL, "line type for E" },
107     { "Enpoints", REAL, "number of points for E" },
108     { "Esymsize", REAL, "symbol size for E" },
109     { "Esymtype", STRING, "symbol type for E" },
110     { "Ethick", REAL, "line thickness for E" },
111     }, {
112     { "F", FUNCTION, "function for curve F" },
113     { "Fcolor", REAL, "color for F" },
114     { "Fdata", DATA, "point data for F" },
115     { "Flabel", STRING },
116     { "Flintype", REAL, "line type for F" },
117     { "Fnpoints", REAL, "number of points for F" },
118     { "Fsymsize", REAL, "symbol size for F" },
119     { "Fsymtype", STRING, "symbol type for F" },
120     { "Fthick", REAL, "line thickness for F" },
121     }, {
122     { "G", FUNCTION, "function for curve G" },
123     { "Gcolor", REAL, "color for G" },
124     { "Gdata", DATA, "point data for G" },
125     { "Glabel", STRING },
126     { "Glintype", REAL, "line type for G" },
127     { "Gnpoints", REAL, "number of points for G" },
128     { "Gsymsize", REAL, "symbol size for G" },
129     { "Gsymtype", STRING, "symbol type for G" },
130     { "Gthick", REAL, "line thickness for G" },
131     }, {
132     { "H", FUNCTION, "function for curve H" },
133     { "Hcolor", REAL, "color for H" },
134     { "Hdata", DATA, "point data for H" },
135     { "Hlabel", STRING },
136     { "Hlintype", REAL, "line type for H" },
137     { "Hnpoints", REAL, "number of points for H" },
138     { "Hsymsize", REAL, "symbol size for H" },
139     { "Hsymtype", STRING, "symbol type for H" },
140     { "Hthick", REAL, "line thickness for H" },
141     },
142     };
143    
144    
145     mgclearall() /* clear all variable settings */
146     {
147     int j;
148     register IVAR *iv;
149     register int i;
150    
151     for (iv = ivhead; iv != NULL; iv = iv->next) {
152     dremove(iv->name);
153     freestr(iv->name);
154     freestr(iv->dfn);
155     efree((char *)iv);
156     }
157     ivhead = NULL;
158    
159     for (i = 0; i < NVARS; i++)
160     if (gparam[i].flags & DEFINED)
161     undefine(&gparam[i]);
162    
163     for (j = 0; j < MAXCUR; j++)
164     for (i = 0; i < NCVARS; i++)
165     if (cparam[j][i].flags & DEFINED)
166     undefine(&cparam[j][i]);
167     }
168    
169    
170     mgload(file) /* load a file */
171     char *file;
172     {
173     FILE *fp;
174     char sbuf[MAXLINE], *fgets();
175     int inquote;
176     register char *cp, *cp2;
177    
178     if (file == NULL) {
179     fp = stdin;
180     file = "<stdin>";
181     } else if ((fp = fopen(file, "r")) == NULL) {
182     fprintf(stderr, "%s: Cannot open: %s\n", progname, file);
183     quit(1);
184     }
185     while (fgets(sbuf+1, sizeof(sbuf)-1, fp) != NULL) {
186     inquote = 0;
187     cp2 = sbuf;
188     for (cp = sbuf+1; *cp; cp++) /* condition the input line */
189     switch (*cp) {
190     case '#':
191     if (!inquote) {
192     cp[0] = '\n';
193     cp[1] = '\0';
194     break;
195     }
196     *cp2++ = *cp;
197     break;
198     case '"':
199     inquote = !inquote;
200     break;
201     case '\\':
202     if (!cp[1])
203     break;
204     if (cp[1] == '\n') {
205     cp[0] = '\0';
206     fgets(cp, sizeof(sbuf)-(cp-sbuf), fp);
207     cp--;
208     break;
209     }
210     *cp2++ = *++cp;
211     break;
212     case ' ':
213     case '\t':
214     case '\n':
215     if (!inquote)
216     break;
217     *cp2++ = *cp;
218     break;
219     default:
220     *cp2++ = *cp;
221     break;
222     }
223     *cp2 = '\0';
224     if (inquote) {
225     fputs(sbuf, stderr);
226     fprintf(stderr, "%s: %s: Missing quote\n",
227     progname, file);
228     quit(1);
229     }
230     if (sbuf[0])
231     setmgvar(file, fp, sbuf);
232     }
233     if (fp != stdin)
234     fclose(fp);
235     }
236    
237    
238     mgsave(file) /* save our variables */
239     char *file;
240     {
241     FILE *fp;
242     int j;
243     register IVAR *iv;
244     register int i;
245    
246     if (file == NULL)
247     fp = stdout;
248     else if ((fp = fopen(file, "w")) == NULL) {
249     fprintf(stderr, "%s: Cannot write: %s\n", progname, file);
250     quit(1);
251     }
252     for (iv = ivhead; iv != NULL; iv = iv->next)
253     fprintf(fp, "%s\n", iv->dfn);
254    
255     for (i = 0; i < NVARS; i++)
256     if (gparam[i].flags & DEFINED)
257     mgprint(&gparam[i], fp);
258    
259     for (j = 0; j < MAXCUR; j++)
260     for (i = 0; i < NCVARS; i++)
261     if (cparam[j][i].flags & DEFINED)
262     mgprint(&cparam[j][i], fp);
263    
264     if (fp != stdout)
265     fclose(fp);
266     }
267    
268    
269     setmgvar(fname, fp, string) /* set a variable */
270     char *fname;
271     FILE *fp;
272     char *string;
273     {
274     char name[128];
275     FILE *fp2;
276     register int i;
277     register char *s;
278     register VARIABLE *vp;
279    
280     if (!strncmp(string, "include=", 8)) { /* include file */
281     if ((s = findfile(string+8, libpath)) == NULL) {
282     fprintf(stderr, "%s\n", string);
283     fprintf(stderr, "%s: %s: File not found: %s\n",
284     progname, fname, string+8);
285     quit(1);
286     }
287     strcpy(name, s);
288     mgload(name);
289     return;
290     }
291     s = string;
292     i = 0;
293     while (i < sizeof(name)-1 && isid(*s))
294     name[i++] = *s++;
295     name[i] = '\0';
296     vp = vlookup(name);
297     if (vp != NULL) {
298     undefine(vp);
299     switch (vp->type) {
300     case REAL:
301     case FUNCTION:
302     if ((*s == '(') != (vp->type == FUNCTION)) {
303     fprintf(stderr, "%s\n", string);
304     fprintf(stderr,
305     "%s: %s: Bad %s declaration: %s\n",
306     progname, fname,
307     vp->type == FUNCTION ?
308     "function" : "variable",
309     name);
310     quit(1);
311     }
312     scompile(string, fname, 0);
313     vp->v.dfn = savestr(string);
314     break;
315     case STRING:
316     if (*s++ != '=') {
317     fprintf(stderr, "%s\n", string);
318     fprintf(stderr, "%s: %s: Missing '='\n",
319     progname, fname);
320     quit(1);
321     }
322     vp->v.s = savestr(s);
323     break;
324     case DATA:
325     if (*s++ != '=') {
326     fprintf(stderr, "%s\n", string);
327     fprintf(stderr, "%s: %s: Missing '='\n",
328     progname, fname);
329     quit(1);
330     }
331     if (!*s) {
332     loaddata(fname, fp, &vp->v.d);
333     #ifdef UNIX
334     } else if (*s == '!') {
335     if ((fp2 = popen(s+1, "r")) == NULL) {
336     fprintf(stderr, "%s\n", string);
337     fprintf(stderr,
338     "%s: %s: Cannot execute: %s\n",
339     progname, fname, s+1);
340     quit(1);
341     }
342     loaddata(s, fp2, &vp->v.d);
343     pclose(fp2);
344     #endif
345     } else {
346     if ((fp2 = fopen(s, "r")) == NULL) {
347     fprintf(stderr, "%s\n", string);
348     fprintf(stderr,
349     "%s: %s: Data file not found: %s\n",
350     progname, fname, s);
351     quit(1);
352     }
353     loaddata(s, fp2, &vp->v.d);
354     fclose(fp2);
355     }
356     break;
357     }
358     vp->flags |= DEFINED;
359     } else
360     setivar(name, fname, string); /* intermediate */
361     }
362    
363    
364     setivar(vname, fname, definition) /* set an intermediate variable */
365     char *vname;
366     char *fname;
367     char *definition;
368     {
369     IVAR ivbeg;
370     register IVAR *iv;
371    
372     scompile(definition, fname, 0); /* compile the string */
373    
374     ivbeg.next = ivhead;
375     for (iv = &ivbeg; iv->next != NULL; iv = iv->next)
376     if (!strcmp(vname, iv->next->name)) {
377     iv = iv->next;
378     freestr(iv->dfn);
379     iv->dfn = savestr(definition);
380     return;
381     }
382    
383     iv->next = (IVAR *)emalloc(sizeof(IVAR));
384     iv = iv->next;
385     iv->name = savestr(vname);
386     iv->dfn = savestr(definition);
387     iv->next = NULL;
388     ivhead = ivbeg.next;
389     }
390    
391    
392     mgtoa(s, vp) /* get a variable's value in ascii form */
393     register char *s;
394     VARIABLE *vp;
395     {
396     register char *sv;
397    
398     if (!(vp->flags & DEFINED)) {
399     strcpy(s, "UNDEFINED");
400     return;
401     }
402     switch (vp->type) {
403     case REAL:
404     case FUNCTION:
405     sv = vp->v.dfn;
406     while (*sv != '=' && *sv != ':')
407     sv++;
408     while (*++sv && *sv != ';')
409     *s++ = *sv;
410     *s = '\0';
411     break;
412     case STRING:
413     strcpy(s, vp->v.s);
414     break;
415     case DATA:
416     strcpy(s, "DATA");
417     break;
418     }
419     }
420    
421    
422     mgprint(vp, fp) /* print a variable definition */
423     register VARIABLE *vp;
424     FILE *fp;
425     {
426     register int i;
427    
428     switch (vp->type) {
429     case REAL:
430     case FUNCTION:
431     fprintf(fp, "%s\n", vp->v.dfn);
432     break;
433     case STRING:
434     fprintf(fp, "%s=\"", vp->name);
435     for (i = 0; vp->v.s[i]; i++)
436     switch (vp->v.s[i]) {
437     case '"':
438     case '\\':
439     putc('\\', fp);
440     /* fall through */
441     default:
442     putc(vp->v.s[i], fp);
443     break;
444     }
445     fprintf(fp, "\"\n");
446     break;
447     case DATA:
448     fprintf(fp, "%s=", vp->name);
449     for (i = 0; i < vp->v.d.size; i++) {
450     if (i % 4 == 0)
451     fprintf(fp, "\n");
452     fprintf(fp, "\t%10e", vp->v.d.data[i]);
453     }
454     fprintf(fp, "\n;\n");
455     break;
456     }
457     }
458    
459    
460     undefine(vp) /* undefine a variable */
461     register VARIABLE *vp;
462     {
463     if (vp == NULL || !(vp->flags & DEFINED))
464     return;
465    
466     switch (vp->type) {
467     case REAL:
468     case FUNCTION:
469     dremove(vp->name);
470     freestr(vp->v.dfn);
471     break;
472     case STRING:
473     freestr(vp->v.s);
474     break;
475     case DATA:
476     efree((char *)vp->v.d.data);
477     break;
478     }
479     vp->flags &= ~DEFINED;
480     }
481    
482    
483     VARIABLE *
484     vlookup(vname) /* look up a variable by its name */
485     char *vname;
486     {
487     register int i;
488     register VARIABLE *vp;
489    
490     i = vname[0] - 'A';
491     if (i >= 0 && i < MAXCUR) /* curve variables */
492     for (vp = cparam[i], i = 0; i < NCVARS; vp++, i++)
493     if (!strcmp(vp->name, vname))
494     return(vp);
495     /* standard variables */
496     for (vp = gparam; vp < &gparam[NVARS]; vp++)
497     if (!strcmp(vp->name, vname))
498     return(vp);
499     return(NULL); /* not found */
500     }
501    
502    
503     loaddata(fname, fp, dp) /* load data from a stream */
504     char *fname;
505     FILE *fp;
506     register DARRAY *dp;
507     {
508     char sbuf[MAXLINE], *fgets();
509     register char *cp;
510    
511     dp->size = 0;
512     dp->data = NULL;
513     while (fgets(sbuf, sizeof(sbuf), fp) != NULL) {
514     cp = sbuf;
515     while (*cp) {
516     while (isspace(*cp) || *cp == ',')
517     cp++;
518     if (isnum(*cp)) {
519     dp->data = (float *)erealloc((char *)dp->data,
520     (dp->size+1)*sizeof(float));
521     dp->data[dp->size++] = atof(cp);
522     do
523     cp++;
524     while (isnum(*cp));
525     } else if (*cp == ';') {
526     return;
527     } else if (*cp) {
528     fputs(sbuf, stderr);
529     fprintf(stderr, "%s: %s: Bad data\n",
530     progname, fname);
531     quit(1);
532     }
533     }
534     }
535     }
536    
537    
538     char *
539     findfile(fname, pathlist) /* find the file fname, return full path */
540     char *fname;
541     register char **pathlist;
542     {
543     static char ffname[128];
544     char *strcpy(), *strcat();
545     register int fd;
546    
547     if (fname[0] == '/')
548     return(fname);
549    
550     while (*pathlist != NULL) {
551     strcpy(ffname, *pathlist);
552     strcat(ffname, fname);
553     if ((fd = open(ffname, 0)) != -1) {
554     close(fd);
555     return(ffname);
556     }
557     pathlist++;
558     }
559     return(NULL);
560     }
561    
562    
563     int
564     mgcurve(c, f) /* get a curve's (unmapped) values */
565     int c;
566     int (*f)();
567     {
568     int nargs;
569     double x[2], step;
570     register VARIABLE *cv;
571     register float *p;
572     register int npts;
573    
574     if (c < 0 || c >= MAXCUR)
575     return(-1);
576     cv = cparam[c];
577    
578     if (cv[C].flags & DEFINED) { /* function or map */
579    
580     nargs = fundefined(cv[C].name);
581     if (nargs < 1 || nargs > 2) {
582     fprintf(stderr, "%s: bad # of arguments for '%c'\n",
583     progname, c+'A');
584     quit(1);
585     }
586    
587     if (cv[CDATA].flags & DEFINED) { /* map */
588     npts = cv[CDATA].v.d.size / nargs;
589     p = cv[CDATA].v.d.data;
590     while (npts--) {
591     x[0] = *p++;
592     if (nargs == 2)
593     x[1] = *p++;
594     (*f)(c, x[0],
595     funvalue(cv[C].name, nargs, x));
596     }
597     npts = cv[CDATA].v.d.size / nargs;
598     } else if ( nargs == 1 && /* function */
599     gparam[XMIN].flags & DEFINED &&
600     gparam[XMAX].flags & DEFINED &&
601     cv[CNPOINTS].flags & DEFINED ) {
602     npts = varvalue(cv[CNPOINTS].name);
603     if (npts > 1)
604     step = (varvalue(gparam[XMAX].name) -
605     varvalue(gparam[XMIN].name)) /
606     (npts - 1);
607     else
608     step = 0.0;
609     for (x[0] = varvalue(gparam[XMIN].name);
610     npts--; x[0] += step)
611     (*f)(c, x[0],
612     funvalue(cv[C].name, 1, x));
613     npts = varvalue(cv[CNPOINTS].name);
614     } else {
615     fprintf(stderr,
616     "%s: function '%c' needs %cdata or xmin, xmax, %cnpoints\n",
617     progname, c+'A', c+'A', c+'A');
618     quit(1);
619     }
620    
621     } else if (cv[CDATA].flags & DEFINED) { /* data */
622    
623     npts = cv[CDATA].v.d.size / 2;
624     p = cv[CDATA].v.d.data;
625     while (npts--) {
626     (*f)(c, p[0], p[1]);
627     p += 2;
628     }
629     npts = cv[CDATA].v.d.size / 2;
630    
631     } else
632    
633     npts = 0;
634    
635     return(npts);
636     }