| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: mgvars.c,v 1.1 2003/02/22 02:07:26 greg Exp $"; |
| 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 |
} else if (*s == '!') { |
| 334 |
if ((fp2 = popen(s+1, "r")) == NULL) { |
| 335 |
fprintf(stderr, "%s\n", string); |
| 336 |
fprintf(stderr, |
| 337 |
"%s: %s: Cannot execute: %s\n", |
| 338 |
progname, fname, s+1); |
| 339 |
quit(1); |
| 340 |
} |
| 341 |
loaddata(s, fp2, &vp->v.d); |
| 342 |
pclose(fp2); |
| 343 |
} else { |
| 344 |
if ((fp2 = fopen(s, "r")) == NULL) { |
| 345 |
fprintf(stderr, "%s\n", string); |
| 346 |
fprintf(stderr, |
| 347 |
"%s: %s: Data file not found: %s\n", |
| 348 |
progname, fname, s); |
| 349 |
quit(1); |
| 350 |
} |
| 351 |
loaddata(s, fp2, &vp->v.d); |
| 352 |
fclose(fp2); |
| 353 |
} |
| 354 |
break; |
| 355 |
} |
| 356 |
vp->flags |= DEFINED; |
| 357 |
} else |
| 358 |
setivar(name, fname, string); /* intermediate */ |
| 359 |
} |
| 360 |
|
| 361 |
|
| 362 |
setivar(vname, fname, definition) /* set an intermediate variable */ |
| 363 |
char *vname; |
| 364 |
char *fname; |
| 365 |
char *definition; |
| 366 |
{ |
| 367 |
IVAR ivbeg; |
| 368 |
register IVAR *iv; |
| 369 |
|
| 370 |
scompile(definition, fname, 0); /* compile the string */ |
| 371 |
|
| 372 |
ivbeg.next = ivhead; |
| 373 |
for (iv = &ivbeg; iv->next != NULL; iv = iv->next) |
| 374 |
if (!strcmp(vname, iv->next->name)) { |
| 375 |
iv = iv->next; |
| 376 |
freestr(iv->dfn); |
| 377 |
iv->dfn = savestr(definition); |
| 378 |
return; |
| 379 |
} |
| 380 |
|
| 381 |
iv->next = (IVAR *)emalloc(sizeof(IVAR)); |
| 382 |
iv = iv->next; |
| 383 |
iv->name = savestr(vname); |
| 384 |
iv->dfn = savestr(definition); |
| 385 |
iv->next = NULL; |
| 386 |
ivhead = ivbeg.next; |
| 387 |
} |
| 388 |
|
| 389 |
|
| 390 |
mgtoa(s, vp) /* get a variable's value in ascii form */ |
| 391 |
register char *s; |
| 392 |
VARIABLE *vp; |
| 393 |
{ |
| 394 |
register char *sv; |
| 395 |
|
| 396 |
if (!(vp->flags & DEFINED)) { |
| 397 |
strcpy(s, "UNDEFINED"); |
| 398 |
return; |
| 399 |
} |
| 400 |
switch (vp->type) { |
| 401 |
case REAL: |
| 402 |
case FUNCTION: |
| 403 |
sv = vp->v.dfn; |
| 404 |
while (*sv != '=' && *sv != ':') |
| 405 |
sv++; |
| 406 |
while (*++sv && *sv != ';') |
| 407 |
*s++ = *sv; |
| 408 |
*s = '\0'; |
| 409 |
break; |
| 410 |
case STRING: |
| 411 |
strcpy(s, vp->v.s); |
| 412 |
break; |
| 413 |
case DATA: |
| 414 |
strcpy(s, "DATA"); |
| 415 |
break; |
| 416 |
} |
| 417 |
} |
| 418 |
|
| 419 |
|
| 420 |
mgprint(vp, fp) /* print a variable definition */ |
| 421 |
register VARIABLE *vp; |
| 422 |
FILE *fp; |
| 423 |
{ |
| 424 |
register int i; |
| 425 |
|
| 426 |
switch (vp->type) { |
| 427 |
case REAL: |
| 428 |
case FUNCTION: |
| 429 |
fprintf(fp, "%s\n", vp->v.dfn); |
| 430 |
break; |
| 431 |
case STRING: |
| 432 |
fprintf(fp, "%s=\"", vp->name); |
| 433 |
for (i = 0; vp->v.s[i]; i++) |
| 434 |
switch (vp->v.s[i]) { |
| 435 |
case '"': |
| 436 |
case '\\': |
| 437 |
putc('\\', fp); |
| 438 |
/* fall through */ |
| 439 |
default: |
| 440 |
putc(vp->v.s[i], fp); |
| 441 |
break; |
| 442 |
} |
| 443 |
fprintf(fp, "\"\n"); |
| 444 |
break; |
| 445 |
case DATA: |
| 446 |
fprintf(fp, "%s=", vp->name); |
| 447 |
for (i = 0; i < vp->v.d.size; i++) { |
| 448 |
if (i % 4 == 0) |
| 449 |
fprintf(fp, "\n"); |
| 450 |
fprintf(fp, "\t%10e", vp->v.d.data[i]); |
| 451 |
} |
| 452 |
fprintf(fp, "\n;\n"); |
| 453 |
break; |
| 454 |
} |
| 455 |
} |
| 456 |
|
| 457 |
|
| 458 |
undefine(vp) /* undefine a variable */ |
| 459 |
register VARIABLE *vp; |
| 460 |
{ |
| 461 |
if (vp == NULL || !(vp->flags & DEFINED)) |
| 462 |
return; |
| 463 |
|
| 464 |
switch (vp->type) { |
| 465 |
case REAL: |
| 466 |
case FUNCTION: |
| 467 |
dremove(vp->name); |
| 468 |
freestr(vp->v.dfn); |
| 469 |
break; |
| 470 |
case STRING: |
| 471 |
freestr(vp->v.s); |
| 472 |
break; |
| 473 |
case DATA: |
| 474 |
efree((char *)vp->v.d.data); |
| 475 |
break; |
| 476 |
} |
| 477 |
vp->flags &= ~DEFINED; |
| 478 |
} |
| 479 |
|
| 480 |
|
| 481 |
VARIABLE * |
| 482 |
vlookup(vname) /* look up a variable by its name */ |
| 483 |
char *vname; |
| 484 |
{ |
| 485 |
register int i; |
| 486 |
register VARIABLE *vp; |
| 487 |
|
| 488 |
i = vname[0] - 'A'; |
| 489 |
if (i >= 0 && i < MAXCUR) /* curve variables */ |
| 490 |
for (vp = cparam[i], i = 0; i < NCVARS; vp++, i++) |
| 491 |
if (!strcmp(vp->name, vname)) |
| 492 |
return(vp); |
| 493 |
/* standard variables */ |
| 494 |
for (vp = gparam; vp < &gparam[NVARS]; vp++) |
| 495 |
if (!strcmp(vp->name, vname)) |
| 496 |
return(vp); |
| 497 |
return(NULL); /* not found */ |
| 498 |
} |
| 499 |
|
| 500 |
|
| 501 |
loaddata(fname, fp, dp) /* load data from a stream */ |
| 502 |
char *fname; |
| 503 |
FILE *fp; |
| 504 |
register DARRAY *dp; |
| 505 |
{ |
| 506 |
char sbuf[MAXLINE], *fgets(); |
| 507 |
register char *cp; |
| 508 |
|
| 509 |
dp->size = 0; |
| 510 |
dp->data = NULL; |
| 511 |
while (fgets(sbuf, sizeof(sbuf), fp) != NULL) { |
| 512 |
cp = sbuf; |
| 513 |
while (*cp) { |
| 514 |
while (isspace(*cp) || *cp == ',') |
| 515 |
cp++; |
| 516 |
if (isnum(*cp)) { |
| 517 |
dp->data = (float *)erealloc((char *)dp->data, |
| 518 |
(dp->size+1)*sizeof(float)); |
| 519 |
dp->data[dp->size++] = atof(cp); |
| 520 |
do |
| 521 |
cp++; |
| 522 |
while (isnum(*cp)); |
| 523 |
} else if (*cp == ';') { |
| 524 |
return; |
| 525 |
} else if (*cp) { |
| 526 |
fputs(sbuf, stderr); |
| 527 |
fprintf(stderr, "%s: %s: Bad data\n", |
| 528 |
progname, fname); |
| 529 |
quit(1); |
| 530 |
} |
| 531 |
} |
| 532 |
} |
| 533 |
} |
| 534 |
|
| 535 |
|
| 536 |
char * |
| 537 |
findfile(fname, pathlist) /* find the file fname, return full path */ |
| 538 |
char *fname; |
| 539 |
register char **pathlist; |
| 540 |
{ |
| 541 |
static char ffname[128]; |
| 542 |
char *strcpy(), *strcat(); |
| 543 |
register int fd; |
| 544 |
|
| 545 |
if (fname[0] == '/') |
| 546 |
return(fname); |
| 547 |
|
| 548 |
while (*pathlist != NULL) { |
| 549 |
strcpy(ffname, *pathlist); |
| 550 |
strcat(ffname, fname); |
| 551 |
if ((fd = open(ffname, 0)) != -1) { |
| 552 |
close(fd); |
| 553 |
return(ffname); |
| 554 |
} |
| 555 |
pathlist++; |
| 556 |
} |
| 557 |
return(NULL); |
| 558 |
} |
| 559 |
|
| 560 |
|
| 561 |
int |
| 562 |
mgcurve(c, f) /* get a curve's (unmapped) values */ |
| 563 |
int c; |
| 564 |
int (*f)(); |
| 565 |
{ |
| 566 |
int nargs; |
| 567 |
double x[2], step; |
| 568 |
register VARIABLE *cv; |
| 569 |
register float *p; |
| 570 |
register int npts; |
| 571 |
|
| 572 |
if (c < 0 || c >= MAXCUR) |
| 573 |
return(-1); |
| 574 |
cv = cparam[c]; |
| 575 |
|
| 576 |
if (cv[C].flags & DEFINED) { /* function or map */ |
| 577 |
|
| 578 |
nargs = fundefined(cv[C].name); |
| 579 |
if (nargs < 1 || nargs > 2) { |
| 580 |
fprintf(stderr, "%s: bad # of arguments for '%c'\n", |
| 581 |
progname, c+'A'); |
| 582 |
quit(1); |
| 583 |
} |
| 584 |
|
| 585 |
if (cv[CDATA].flags & DEFINED) { /* map */ |
| 586 |
npts = cv[CDATA].v.d.size / nargs; |
| 587 |
p = cv[CDATA].v.d.data; |
| 588 |
while (npts--) { |
| 589 |
x[0] = *p++; |
| 590 |
if (nargs == 2) |
| 591 |
x[1] = *p++; |
| 592 |
(*f)(c, x[0], |
| 593 |
funvalue(cv[C].name, nargs, x)); |
| 594 |
} |
| 595 |
npts = cv[CDATA].v.d.size / nargs; |
| 596 |
} else if ( nargs == 1 && /* function */ |
| 597 |
gparam[XMIN].flags & DEFINED && |
| 598 |
gparam[XMAX].flags & DEFINED && |
| 599 |
cv[CNPOINTS].flags & DEFINED ) { |
| 600 |
npts = varvalue(cv[CNPOINTS].name); |
| 601 |
if (npts > 1) |
| 602 |
step = (varvalue(gparam[XMAX].name) - |
| 603 |
varvalue(gparam[XMIN].name)) / |
| 604 |
(npts - 1); |
| 605 |
else |
| 606 |
step = 0.0; |
| 607 |
for (x[0] = varvalue(gparam[XMIN].name); |
| 608 |
npts--; x[0] += step) |
| 609 |
(*f)(c, x[0], |
| 610 |
funvalue(cv[C].name, 1, x)); |
| 611 |
npts = varvalue(cv[CNPOINTS].name); |
| 612 |
} else { |
| 613 |
fprintf(stderr, |
| 614 |
"%s: function '%c' needs %cdata or xmin, xmax, %cnpoints\n", |
| 615 |
progname, c+'A', c+'A', c+'A'); |
| 616 |
quit(1); |
| 617 |
} |
| 618 |
|
| 619 |
} else if (cv[CDATA].flags & DEFINED) { /* data */ |
| 620 |
|
| 621 |
npts = cv[CDATA].v.d.size / 2; |
| 622 |
p = cv[CDATA].v.d.data; |
| 623 |
while (npts--) { |
| 624 |
(*f)(c, p[0], p[1]); |
| 625 |
p += 2; |
| 626 |
} |
| 627 |
npts = cv[CDATA].v.d.size / 2; |
| 628 |
|
| 629 |
} else |
| 630 |
|
| 631 |
npts = 0; |
| 632 |
|
| 633 |
return(npts); |
| 634 |
} |
