src/fccfg.c

   1 /*
   2  * $XFree86: xc/lib/fontconfig/src/fccfg.c,v 1.11 2002/06/08 17:32:04 keithp Exp $
   3  *
   4  * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of Keith Packard not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  Keith Packard makes no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "fcint.h"
  26
  27 FcConfig    *_fcConfig;
  28
  29 FcConfig *
  30 FcConfigCreate (void)
  31 {
  32     FcSetName   set;
  33     FcConfig    *config;
  34
  35     config = malloc (sizeof (FcConfig));
  36     if (!config)
  37         goto bail0;
  38     FcMemAlloc (FC_MEM_CONFIG, sizeof (FcConfig));
  39
  40     config->configDirs = FcStrSetCreate ();
  41     if (!config->configDirs)
  42         goto bail1;
  43
  44     config->configFiles = FcStrSetCreate ();
  45     if (!config->configFiles)
  46         goto bail2;
  47
  48     config->fontDirs = FcStrSetCreate ();
  49     if (!config->fontDirs)
  50         goto bail3;
  51
  52     config->cache = 0;
  53     if (!FcConfigSetCache (config, (FcChar8 *) ("~/" FC_USER_CACHE_FILE)))
  54         goto bail4;
  55
  56     config->blanks = 0;
  57
  58     config->substPattern = 0;
  59     config->substFont = 0;
  60     config->maxObjects = 0;
  61     for (set = FcSetSystem; set <= FcSetApplication; set++)
  62         config->fonts[set] = 0;
  63
  64     config->rescanTime = time(0);
  65     config->rescanInterval = 30;
  66
  67     return config;
  68
  69 bail4:
  70     FcStrSetDestroy (config->fontDirs);
  71 bail3:
  72     FcStrSetDestroy (config->configFiles);
  73 bail2:
  74     FcStrSetDestroy (config->configDirs);
  75 bail1:
  76     free (config);
  77     FcMemFree (FC_MEM_CONFIG, sizeof (FcConfig));
  78 bail0:
  79     return 0;
  80 }
  81
  82 static time_t
  83 FcConfigNewestFile (FcStrSet *files)
  84 {
  85     FcStrList       *list = FcStrListCreate (files);
  86     FcBool          set = FcFalse;
  87     time_t          newest = 0;
  88     FcChar8         *file;
  89     struct  stat    statb;
  90
  91     if (list)
  92     {
  93         while ((file = FcStrListNext (list)))
  94         {
  95             if (stat ((char *) file, &statb) == 0)
  96             {
  97                 if (!set)
  98                     newest = statb.st_mtime;
  99                 else if (statb.st_mtime - newest > 0)
 100                     newest = statb.st_mtime;
 101             }
 102         }
 103         FcStrListDone (list);
 104     }
 105     return newest;
 106 }
 107
 108 FcBool
 109 FcConfigUptoDate (FcConfig *config)
 110 {
 111     time_t  config_time;
 112     time_t  font_time;
 113     time_t  now = time(0);
 114     if (!config)
 115     {
 116         config = FcConfigGetCurrent ();
 117         if (!config)
 118             return FcFalse;
 119     }
 120     config_time = FcConfigNewestFile (config->configFiles);
 121     font_time = FcConfigNewestFile (config->configDirs);
 122     if (config_time - config->rescanTime > 0 ||
 123         font_time - config->rescanTime > 0)
 124     {
 125         return FcFalse;
 126     }
 127     config->rescanTime = now;
 128     return FcTrue;
 129 }
 130
 131 static void
 132 FcSubstDestroy (FcSubst *s)
 133 {
 134     FcSubst *n;
 135
 136     while (s)
 137     {
 138         n = s->next;
 139         FcTestDestroy (s->test);
 140         FcEditDestroy (s->edit);
 141         s = n;
 142     }
 143 }
 144
 145 void
 146 FcConfigDestroy (FcConfig *config)
 147 {
 148     FcSetName   set;
 149
 150     if (config == _fcConfig)
 151         _fcConfig = 0;
 152
 153     FcStrSetDestroy (config->configDirs);
 154     FcStrSetDestroy (config->fontDirs);
 155     FcStrSetDestroy (config->configFiles);
 156
 157     FcStrFree (config->cache);
 158
 159     FcSubstDestroy (config->substPattern);
 160     FcSubstDestroy (config->substFont);
 161     for (set = FcSetSystem; set <= FcSetApplication; set++)
 162         if (config->fonts[set])
 163             FcFontSetDestroy (config->fonts[set]);
 164     free (config);
 165     FcMemFree (FC_MEM_CONFIG, sizeof (FcConfig));
 166 }
 167
 168 /*
 169  * Scan the current list of directories in the configuration
 170  * and build the set of available fonts. Update the
 171  * per-user cache file to reflect the new configuration
 172  */
 173
 174 FcBool
 175 FcConfigBuildFonts (FcConfig *config)
 176 {
 177     FcFontSet   *fonts;
 178     FcFileCache *cache;
 179     FcStrList   *list;
 180     FcChar8     *dir;
 181
 182     fonts = FcFontSetCreate ();
 183     if (!fonts)
 184         goto bail0;
 185
 186     cache = FcFileCacheCreate ();
 187     if (!cache)
 188         goto bail1;
 189
 190     FcFileCacheLoad (cache, config->cache);
 191
 192     list = FcConfigGetFontDirs (config);
 193     if (!list)
 194         goto bail1;
 195
 196     while ((dir = FcStrListNext (list)))
 197     {
 198         if (FcDebug () & FC_DBG_FONTSET)
 199             printf ("scan dir %s\n", dir);
 200         FcDirScan (fonts, config->fontDirs, cache, config->blanks, dir, FcFalse);
 201     }
 202
 203     FcStrListDone (list);
 204
 205     if (FcDebug () & FC_DBG_FONTSET)
 206         FcFontSetPrint (fonts);
 207
 208     FcFileCacheSave (cache, config->cache);
 209     FcFileCacheDestroy (cache);
 210
 211     FcConfigSetFonts (config, fonts, FcSetSystem);
 212
 213     return FcTrue;
 214 bail1:
 215     FcFontSetDestroy (fonts);
 216 bail0:
 217     return FcFalse;
 218 }
 219
 220 FcBool
 221 FcConfigSetCurrent (FcConfig *config)
 222 {
 223     if (!config->fonts)
 224         if (!FcConfigBuildFonts (config))
 225             return FcFalse;
 226
 227     if (_fcConfig)
 228         FcConfigDestroy (_fcConfig);
 229     _fcConfig = config;
 230     return FcTrue;
 231 }
 232
 233 FcConfig *
 234 FcConfigGetCurrent (void)
 235 {
 236     if (!_fcConfig)
 237         if (!FcInit ())
 238             return 0;
 239     return _fcConfig;
 240 }
 241
 242 FcBool
 243 FcConfigAddConfigDir (FcConfig      *config,
 244                       const FcChar8 *d)
 245 {
 246     return FcStrSetAddFilename (config->configDirs, d);
 247 }
 248
 249 FcStrList *
 250 FcConfigGetConfigDirs (FcConfig   *config)
 251 {
 252     if (!config)
 253     {
 254         config = FcConfigGetCurrent ();
 255         if (!config)
 256             return 0;
 257     }
 258     return FcStrListCreate (config->configDirs);
 259 }
 260
 261 FcBool
 262 FcConfigAddFontDir (FcConfig        *config,
 263                     const FcChar8   *d)
 264 {
 265     return FcStrSetAddFilename (config->fontDirs, d);
 266 }
 267
 268 FcBool
 269 FcConfigAddDir (FcConfig            *config,
 270                 const FcChar8       *d)
 271 {
 272     return (FcConfigAddConfigDir (config, d) &&
 273             FcConfigAddFontDir (config, d));
 274 }
 275
 276 FcStrList *
 277 FcConfigGetFontDirs (FcConfig   *config)
 278 {
 279     if (!config)
 280     {
 281         config = FcConfigGetCurrent ();
 282         if (!config)
 283             return 0;
 284     }
 285     return FcStrListCreate (config->fontDirs);
 286 }
 287
 288 FcBool
 289 FcConfigAddConfigFile (FcConfig     *config,
 290                        const FcChar8   *f)
 291 {
 292     FcBool      ret;
 293     FcChar8     *file = FcConfigFilename (f);
 294
 295     if (!file)
 296         return FcFalse;
 297
 298     ret = FcStrSetAdd (config->configFiles, file);
 299     FcStrFree (file);
 300     return ret;
 301 }
 302
 303 FcStrList *
 304 FcConfigGetConfigFiles (FcConfig    *config)
 305 {
 306     if (!config)
 307     {
 308         config = FcConfigGetCurrent ();
 309         if (!config)
 310             return 0;
 311     }
 312     return FcStrListCreate (config->configFiles);
 313 }
 314
 315 FcBool
 316 FcConfigSetCache (FcConfig      *config,
 317                   const FcChar8 *c)
 318 {
 319     FcChar8    *new = FcStrCopyFilename (c);
 320
 321     if (!new)
 322         return FcFalse;
 323     if (config->cache)
 324         FcStrFree (config->cache);
 325     config->cache = new;
 326     return FcTrue;
 327 }
 328
 329 FcChar8 *
 330 FcConfigGetCache (FcConfig  *config)
 331 {
 332     if (!config)
 333     {
 334         config = FcConfigGetCurrent ();
 335         if (!config)
 336             return 0;
 337     }
 338     return config->cache;
 339 }
 340
 341 FcFontSet *
 342 FcConfigGetFonts (FcConfig      *config,
 343                   FcSetName     set)
 344 {
 345     if (!config)
 346     {
 347         config = FcConfigGetCurrent ();
 348         if (!config)
 349             return 0;
 350     }
 351     return config->fonts[set];
 352 }
 353
 354 void
 355 FcConfigSetFonts (FcConfig      *config,
 356                   FcFontSet     *fonts,
 357                   FcSetName     set)
 358 {
 359     if (config->fonts[set])
 360         FcFontSetDestroy (config->fonts[set]);
 361     config->fonts[set] = fonts;
 362 }
 363
 364
 365
 366 FcBlanks *
 367 FcConfigGetBlanks (FcConfig     *config)
 368 {
 369     if (!config)
 370     {
 371         config = FcConfigGetCurrent ();
 372         if (!config)
 373             return 0;
 374     }
 375     return config->blanks;
 376 }
 377
 378 FcBool
 379 FcConfigAddBlank (FcConfig      *config,
 380                   FcChar32      blank)
 381 {
 382     FcBlanks    *b;
 383
 384     b = config->blanks;
 385     if (!b)
 386     {
 387         b = FcBlanksCreate ();
 388         if (!b)
 389             return FcFalse;
 390     }
 391     if (!FcBlanksAdd (b, blank))
 392         return FcFalse;
 393     config->blanks = b;
 394     return FcTrue;
 395 }
 396
 397 int
 398 FcConfigGetRescanInverval (FcConfig *config)
 399 {
 400     if (!config)
 401     {
 402         config = FcConfigGetCurrent ();
 403         if (!config)
 404             return 0;
 405     }
 406     return config->rescanInterval;
 407 }
 408
 409 FcBool
 410 FcConfigSetRescanInverval (FcConfig *config, int rescanInterval)
 411 {
 412     if (!config)
 413     {
 414         config = FcConfigGetCurrent ();
 415         if (!config)
 416             return FcFalse;
 417     }
 418     config->rescanInterval = rescanInterval;
 419     return FcTrue;
 420 }
 421
 422 FcBool
 423 FcConfigAddEdit (FcConfig       *config,
 424                  FcTest         *test,
 425                  FcEdit         *edit,
 426                  FcMatchKind    kind)
 427 {
 428     FcSubst     *subst, **prev;
 429     FcTest      *t;
 430     int         num;
 431
 432     subst = (FcSubst *) malloc (sizeof (FcSubst));
 433     if (!subst)
 434         return FcFalse;
 435     if (kind == FcMatchPattern)
 436         prev = &config->substPattern;
 437     else
 438         prev = &config->substFont;
 439     for (; *prev; prev = &(*prev)->next);
 440     *prev = subst;
 441     subst->next = 0;
 442     subst->test = test;
 443     subst->edit = edit;
 444     if (FcDebug () & FC_DBG_EDIT)
 445     {
 446         printf ("Add Subst ");
 447         FcSubstPrint (subst);
 448     }
 449     num = 0;
 450     for (t = test; t; t = t->next)
 451         num++;
 452     if (config->maxObjects < num)
 453         config->maxObjects = num;
 454     return FcTrue;
 455 }
 456
 457 typedef struct _FcSubState {
 458     FcPatternElt   *elt;
 459     FcValueList    *value;
 460 } FcSubState;
 461
 462 static const FcMatrix    FcIdentityMatrix = { 1, 0, 0, 1 };
 463
 464 static FcValue
 465 FcConfigPromote (FcValue v, FcValue u)
 466 {
 467     if (v.type == FcTypeInteger)
 468     {
 469         v.type = FcTypeDouble;
 470         v.u.d = (double) v.u.i;
 471     }
 472     else if (v.type == FcTypeVoid && u.type == FcTypeMatrix)
 473     {
 474         v.u.m = FcMatrixCopy (&FcIdentityMatrix);
 475         if (v.u.m)
 476             v.type = FcTypeMatrix;
 477     }
 478     return v;
 479 }
 480
 481 FcBool
 482 FcConfigCompareValue (FcValue   m,
 483                       FcOp      op,
 484                       FcValue   v)
 485 {
 486     FcBool    ret = FcFalse;
 487
 488     m = FcConfigPromote (m, v);
 489     v = FcConfigPromote (v, m);
 490     if (m.type == v.type)
 491     {
 492         ret = FcFalse;
 493         switch (m.type) {
 494         case FcTypeInteger:
 495             break;      /* FcConfigPromote prevents this from happening */
 496         case FcTypeDouble:
 497             switch (op) {
 498             case FcOpEqual:
 499             case FcOpContains:
 500                 ret = m.u.d == v.u.d;
 501                 break;
 502             case FcOpNotEqual:
 503                 ret = m.u.d != v.u.d;
 504                 break;
 505             case FcOpLess:
 506                 ret = m.u.d < v.u.d;
 507                 break;
 508             case FcOpLessEqual:
 509                 ret = m.u.d <= v.u.d;
 510                 break;
 511             case FcOpMore:
 512                 ret = m.u.d > v.u.d;
 513                 break;
 514             case FcOpMoreEqual:
 515                 ret = m.u.d >= v.u.d;
 516                 break;
 517             default:
 518                 break;
 519             }
 520             break;
 521         case FcTypeBool:
 522             switch (op) {
 523             case FcOpEqual:
 524             case FcOpContains:
 525                 ret = m.u.b == v.u.b;
 526                 break;
 527             case FcOpNotEqual:
 528                 ret = m.u.b != v.u.b;
 529                 break;
 530             default:
 531                 break;
 532             }
 533             break;
 534         case FcTypeString:
 535             switch (op) {
 536             case FcOpEqual:
 537             case FcOpContains:
 538                 ret = FcStrCmpIgnoreCase (m.u.s, v.u.s) == 0;
 539                 break;
 540             case FcOpNotEqual:
 541                 ret = FcStrCmpIgnoreCase (m.u.s, v.u.s) != 0;
 542                 break;
 543             default:
 544                 break;
 545             }
 546             break;
 547         case FcTypeMatrix:
 548             switch (op) {
 549             case FcOpEqual:
 550             case FcOpContains:
 551                 ret = FcMatrixEqual (m.u.m, v.u.m);
 552                 break;
 553             case FcOpNotEqual:
 554                 ret = !FcMatrixEqual (m.u.m, v.u.m);
 555                 break;
 556             default:
 557                 break;
 558             }
 559             break;
 560         case FcTypeCharSet:
 561             switch (op) {
 562             case FcOpContains:
 563                 /* m contains v if v is a subset of m */
 564                 ret = FcCharSetIsSubset (v.u.c, m.u.c);
 565                 break;
 566             case FcOpEqual:
 567                 ret = FcCharSetEqual (m.u.c, v.u.c);
 568                 break;
 569             case FcOpNotEqual:
 570                 ret = !FcCharSetEqual (m.u.c, v.u.c);
 571                 break;
 572             default:
 573                 break;
 574             }
 575             break;
 576         case FcTypeVoid:
 577             switch (op) {
 578             case FcOpEqual:
 579             case FcOpContains:
 580                 ret = FcTrue;
 581                 break;
 582             default:
 583                 break;
 584             }
 585             break;
 586         case FcTypeFTFace:
 587             switch (op) {
 588             case FcOpEqual:
 589                 ret = m.u.f == v.u.f;
 590                 break;
 591             case FcOpNotEqual:
 592                 ret = m.u.f != v.u.f;
 593                 break;
 594             default:
 595                 break;
 596             }
 597         }
 598     }
 599     else
 600     {
 601         if (op == FcOpNotEqual)
 602             ret = FcTrue;
 603     }
 604     return ret;
 605 }
 606
 607
 608 static FcValue
 609 FcConfigEvaluate (FcPattern *p, FcExpr *e)
 610 {
 611     FcValue     v, vl, vr;
 612     FcResult    r;
 613     FcMatrix    *m;
 614
 615     switch (e->op) {
 616     case FcOpInteger:
 617         v.type = FcTypeInteger;
 618         v.u.i = e->u.ival;
 619         break;
 620     case FcOpDouble:
 621         v.type = FcTypeDouble;
 622         v.u.d = e->u.dval;
 623         break;
 624     case FcOpString:
 625         v.type = FcTypeString;
 626         v.u.s = e->u.sval;
 627         v = FcValueSave (v);
 628         break;
 629     case FcOpMatrix:
 630         v.type = FcTypeMatrix;
 631         v.u.m = e->u.mval;
 632         v = FcValueSave (v);
 633         break;
 634     case FcOpCharSet:
 635         v.type = FcTypeCharSet;
 636         v.u.c = e->u.cval;
 637         v = FcValueSave (v);
 638         break;
 639     case FcOpBool:
 640         v.type = FcTypeBool;
 641         v.u.b = e->u.bval;
 642         break;
 643     case FcOpField:
 644         r = FcPatternGet (p, e->u.field, 0, &v);
 645         if (r != FcResultMatch)
 646             v.type = FcTypeVoid;
 647         break;
 648     case FcOpConst:
 649         if (FcNameConstant (e->u.constant, &v.u.i))
 650             v.type = FcTypeInteger;
 651         else
 652             v.type = FcTypeVoid;
 653         break;
 654     case FcOpQuest:
 655         vl = FcConfigEvaluate (p, e->u.tree.left);
 656         if (vl.type == FcTypeBool)
 657         {
 658             if (vl.u.b)
 659                 v = FcConfigEvaluate (p, e->u.tree.right->u.tree.left);
 660             else
 661                 v = FcConfigEvaluate (p, e->u.tree.right->u.tree.right);
 662         }
 663         else
 664             v.type = FcTypeVoid;
 665         FcValueDestroy (vl);
 666         break;
 667     case FcOpOr:
 668     case FcOpAnd:
 669     case FcOpEqual:
 670     case FcOpContains:
 671     case FcOpNotEqual:
 672     case FcOpLess:
 673     case FcOpLessEqual:
 674     case FcOpMore:
 675     case FcOpMoreEqual:
 676     case FcOpPlus:
 677     case FcOpMinus:
 678     case FcOpTimes:
 679     case FcOpDivide:
 680         vl = FcConfigEvaluate (p, e->u.tree.left);
 681         vr = FcConfigEvaluate (p, e->u.tree.right);
 682         vl = FcConfigPromote (vl, vr);
 683         vr = FcConfigPromote (vr, vl);
 684         if (vl.type == vr.type)
 685         {
 686             switch (vl.type) {
 687             case FcTypeDouble:
 688                 switch (e->op) {
 689                 case FcOpPlus:
 690                     v.type = FcTypeDouble;
 691                     v.u.d = vl.u.d + vr.u.d;
 692                     break;
 693                 case FcOpMinus:
 694                     v.type = FcTypeDouble;
 695                     v.u.d = vl.u.d - vr.u.d;
 696                     break;
 697                 case FcOpTimes:
 698                     v.type = FcTypeDouble;
 699                     v.u.d = vl.u.d * vr.u.d;
 700                     break;
 701                 case FcOpDivide:
 702                     v.type = FcTypeDouble;
 703                     v.u.d = vl.u.d / vr.u.d;
 704                     break;
 705                 case FcOpEqual:
 706                 case FcOpContains:
 707                     v.type = FcTypeBool;
 708                     v.u.b = vl.u.d == vr.u.d;
 709                     break;
 710                 case FcOpNotEqual:
 711                     v.type = FcTypeBool;
 712                     v.u.b = vl.u.d != vr.u.d;
 713                     break;
 714                 case FcOpLess:
 715                     v.type = FcTypeBool;
 716                     v.u.b = vl.u.d < vr.u.d;
 717                     break;
 718                 case FcOpLessEqual:
 719                     v.type = FcTypeBool;
 720                     v.u.b = vl.u.d <= vr.u.d;
 721                     break;
 722                 case FcOpMore:
 723                     v.type = FcTypeBool;
 724                     v.u.b = vl.u.d > vr.u.d;
 725                     break;
 726                 case FcOpMoreEqual:
 727                     v.type = FcTypeBool;
 728                     v.u.b = vl.u.d >= vr.u.d;
 729                     break;
 730                 default:
 731                     v.type = FcTypeVoid;
 732                     break;
 733                 }
 734                 if (v.type == FcTypeDouble &&
 735                     v.u.d == (double) (int) v.u.d)
 736                 {
 737                     v.type = FcTypeInteger;
 738                     v.u.i = (int) v.u.d;
 739                 }
 740                 break;
 741             case FcTypeBool:
 742                 switch (e->op) {
 743                 case FcOpOr:
 744                     v.type = FcTypeBool;
 745                     v.u.b = vl.u.b || vr.u.b;
 746                     break;
 747                 case FcOpAnd:
 748                     v.type = FcTypeBool;
 749                     v.u.b = vl.u.b && vr.u.b;
 750                     break;
 751                 case FcOpEqual:
 752                 case FcOpContains:
 753                     v.type = FcTypeBool;
 754                     v.u.b = vl.u.b == vr.u.b;
 755                     break;
 756                 case FcOpNotEqual:
 757                     v.type = FcTypeBool;
 758                     v.u.b = vl.u.b != vr.u.b;
 759                     break;
 760                 default:
 761                     v.type = FcTypeVoid;
 762                     break;
 763                 }
 764                 break;
 765             case FcTypeString:
 766                 switch (e->op) {
 767                 case FcOpEqual:
 768                 case FcOpContains:
 769                     v.type = FcTypeBool;
 770                     v.u.b = FcStrCmpIgnoreCase (vl.u.s, vr.u.s) == 0;
 771                     break;
 772                 case FcOpNotEqual:
 773                     v.type = FcTypeBool;
 774                     v.u.b = FcStrCmpIgnoreCase (vl.u.s, vr.u.s) != 0;
 775                     break;
 776                 case FcOpPlus:
 777                     v.type = FcTypeString;
 778                     v.u.s = FcStrPlus (vl.u.s, vr.u.s);
 779                     if (!v.u.s)
 780                         v.type = FcTypeVoid;
 781                     break;
 782                 default:
 783                     v.type = FcTypeVoid;
 784                     break;
 785                 }
 786             case FcTypeMatrix:
 787                 switch (e->op) {
 788                 case FcOpEqual:
 789                 case FcOpContains:
 790                     v.type = FcTypeBool;
 791                     v.u.b = FcMatrixEqual (vl.u.m, vr.u.m);
 792                     break;
 793                 case FcOpNotEqual:
 794                     v.type = FcTypeBool;
 795                     v.u.b = FcMatrixEqual (vl.u.m, vr.u.m);
 796                     break;
 797                 case FcOpTimes:
 798                     v.type = FcTypeMatrix;
 799                     m = malloc (sizeof (FcMatrix));
 800                     if (m)
 801                     {
 802                         FcMemAlloc (FC_MEM_MATRIX, sizeof (FcMatrix));
 803                         FcMatrixMultiply (m, vl.u.m, vr.u.m);
 804                         v.u.m = m;
 805                     }
 806                     else
 807                     {
 808                         v.type = FcTypeVoid;
 809                     }
 810                     break;
 811                 default:
 812                     v.type = FcTypeVoid;
 813                     break;
 814                 }
 815                 break;
 816             case FcTypeCharSet:
 817                 switch (e->op) {
 818                 case FcOpContains:
 819                     /* vl contains vr if vr is a subset of vl */
 820                     v.type = FcTypeBool;
 821                     v.u.b = FcCharSetIsSubset (vr.u.c, vl.u.c);
 822                     break;
 823                 case FcOpEqual:
 824                     v.type = FcTypeBool;
 825                     v.u.b = FcCharSetEqual (vl.u.c, vr.u.c);
 826                     break;
 827                 case FcOpNotEqual:
 828                     v.type = FcTypeBool;
 829                     v.u.b = !FcCharSetEqual (vl.u.c, vr.u.c);
 830                     break;
 831                 default:
 832                     v.type = FcTypeVoid;
 833                     break;
 834                 }
 835                 break;
 836             default:
 837                 v.type = FcTypeVoid;
 838                 break;
 839             }
 840         }
 841         else
 842             v.type = FcTypeVoid;
 843         FcValueDestroy (vl);
 844         FcValueDestroy (vr);
 845         break;
 846     case FcOpNot:
 847         vl = FcConfigEvaluate (p, e->u.tree.left);
 848         switch (vl.type) {
 849         case FcTypeBool:
 850             v.type = FcTypeBool;
 851             v.u.b = !vl.u.b;
 852             break;
 853         default:
 854             v.type = FcTypeVoid;
 855             break;
 856         }
 857         FcValueDestroy (vl);
 858         break;
 859     default:
 860         v.type = FcTypeVoid;
 861         break;
 862     }
 863     return v;
 864 }
 865
 866 static FcValueList *
 867 FcConfigMatchValueList (FcPattern       *p,
 868                         FcTest          *t,
 869                         FcValueList     *values)
 870 {
 871     FcValueList     *ret = 0;
 872     FcExpr          *e = t->expr;
 873     FcValue         value;
 874     FcValueList     *v;
 875
 876     while (e)
 877     {
 878         if (e->op == FcOpComma)
 879         {
 880             value = FcConfigEvaluate (p, e->u.tree.left);
 881             e = e->u.tree.right;
 882         }
 883         else
 884         {
 885             value = FcConfigEvaluate (p, e);
 886             e = 0;
 887         }
 888
 889         for (v = values; v; v = v->next)
 890         {
 891             if (FcConfigCompareValue (v->value, t->op, value))
 892             {
 893                 if (!ret)
 894                     ret = v;
 895             }
 896             else
 897             {
 898                 if (t->qual == FcQualAll)
 899                 {
 900                     ret = 0;
 901                     break;
 902                 }
 903             }
 904         }
 905         FcValueDestroy (value);
 906     }
 907     return ret;
 908 }
 909
 910 static FcValueList *
 911 FcConfigValues (FcPattern *p, FcExpr *e)
 912 {
 913     FcValueList *l;
 914
 915     if (!e)
 916         return 0;
 917     l = (FcValueList *) malloc (sizeof (FcValueList));
 918     if (!l)
 919         return 0;
 920     FcMemAlloc (FC_MEM_VALLIST, sizeof (FcValueList));
 921     if (e->op == FcOpComma)
 922     {
 923         l->value = FcConfigEvaluate (p, e->u.tree.left);
 924         l->next  = FcConfigValues (p, e->u.tree.right);
 925     }
 926     else
 927     {
 928         l->value = FcConfigEvaluate (p, e);
 929         l->next  = 0;
 930     }
 931     while (l && l->value.type == FcTypeVoid)
 932     {
 933         FcValueList     *next = l->next;
 934
 935         FcMemFree (FC_MEM_VALLIST, sizeof (FcValueList));
 936         free (l);
 937         l = next;
 938     }
 939     return l;
 940 }
 941
 942 static FcBool
 943 FcConfigAdd (FcValueList    **head,
 944              FcValueList    *position,
 945              FcBool         append,
 946              FcValueList    *new)
 947 {
 948     FcValueList    **prev, *last;
 949
 950     if (append)
 951     {
 952         if (position)
 953             prev = &position->next;
 954         else
 955             for (prev = head; *prev; prev = &(*prev)->next)
 956                 ;
 957     }
 958     else
 959     {
 960         if (position)
 961         {
 962             for (prev = head; *prev; prev = &(*prev)->next)
 963             {
 964                 if (*prev == position)
 965                     break;
 966             }
 967         }
 968         else
 969             prev = head;
 970
 971         if (FcDebug () & FC_DBG_EDIT)
 972         {
 973             if (!*prev)
 974                 printf ("position not on list\n");
 975         }
 976     }
 977
 978     if (FcDebug () & FC_DBG_EDIT)
 979     {
 980         printf ("%s list before ", append ? "Append" : "Prepend");
 981         FcValueListPrint (*head);
 982         printf ("\n");
 983     }
 984
 985     if (new)
 986     {
 987         last = new;
 988         while (last->next)
 989             last = last->next;
 990
 991         last->next = *prev;
 992         *prev = new;
 993     }
 994
 995     if (FcDebug () & FC_DBG_EDIT)
 996     {
 997         printf ("%s list after ", append ? "Append" : "Prepend");
 998         FcValueListPrint (*head);
 999         printf ("\n");
1000     }
1001
1002     return FcTrue;
1003 }
1004
1005 static void
1006 FcConfigDel (FcValueList    **head,
1007              FcValueList    *position)
1008 {
1009     FcValueList    **prev;
1010
1011     for (prev = head; *prev; prev = &(*prev)->next)
1012     {
1013         if (*prev == position)
1014         {
1015             *prev = position->next;
1016             position->next = 0;
1017             FcValueListDestroy (position);
1018             break;
1019         }
1020     }
1021 }
1022
1023 static void
1024 FcConfigPatternAdd (FcPattern   *p,
1025                     const char  *object,
1026                     FcValueList *list,
1027                     FcBool      append)
1028 {
1029     if (list)
1030     {
1031         FcPatternElt    *e = FcPatternInsertElt (p, object);
1032
1033         if (!e)
1034             return;
1035         FcConfigAdd (&e->values, 0, append, list);
1036     }
1037 }
1038
1039 /*
1040  * Delete all values associated with a field
1041  */
1042 static void
1043 FcConfigPatternDel (FcPattern   *p,
1044                     const char  *object)
1045 {
1046     FcPatternElt    *e = FcPatternFindElt (p, object);
1047     if (!e)
1048         return;
1049     while (e->values)
1050         FcConfigDel (&e->values, e->values);
1051 }
1052
1053 static void
1054 FcConfigPatternCanon (FcPattern     *p,
1055                       const char    *object)
1056 {
1057     FcPatternElt    *e = FcPatternFindElt (p, object);
1058     if (!e)
1059         return;
1060     if (!e->values)
1061         FcPatternDel (p, object);
1062 }
1063
1064 FcBool
1065 FcConfigSubstitute (FcConfig    *config,
1066                     FcPattern   *p,
1067                     FcMatchKind kind)
1068 {
1069     FcSubst         *s;
1070     FcSubState      *st;
1071     int             i;
1072     FcTest          *t;
1073     FcEdit          *e;
1074     FcValueList     *l;
1075
1076     if (!config)
1077     {
1078         config = FcConfigGetCurrent ();
1079         if (!config)
1080             return FcFalse;
1081     }
1082
1083     st = (FcSubState *) malloc (config->maxObjects * sizeof (FcSubState));
1084     if (!st && config->maxObjects)
1085         return FcFalse;
1086     FcMemAlloc (FC_MEM_SUBSTATE, config->maxObjects * sizeof (FcSubState));
1087
1088     if (FcDebug () & FC_DBG_EDIT)
1089     {
1090         printf ("FcConfigSubstitute ");
1091         FcPatternPrint (p);
1092     }
1093     if (kind == FcMatchPattern)
1094         s = config->substPattern;
1095     else
1096         s = config->substFont;
1097     for (; s; s = s->next)
1098     {
1099         /*
1100          * Check the tests to see if
1101          * they all match the pattern
1102          */
1103         for (t = s->test, i = 0; t; t = t->next, i++)
1104         {
1105             if (FcDebug () & FC_DBG_EDIT)
1106             {
1107                 printf ("FcConfigSubstitute test ");
1108                 FcTestPrint (t);
1109             }
1110             st[i].elt = FcPatternFindElt (p, t->field);
1111             /*
1112              * If there's no such field in the font,
1113              * then FcQualAll matches while FcQualAny does not
1114              */
1115             if (!st[i].elt)
1116             {
1117                 if (t->qual == FcQualAll)
1118                 {
1119                     st[i].value = 0;
1120                     continue;
1121                 }
1122                 else
1123                     break;
1124             }
1125             /*
1126              * Check to see if there is a match, mark the location
1127              * to apply match-relative edits
1128              */
1129             st[i].value = FcConfigMatchValueList (p, t, st[i].elt->values);
1130             if (!st[i].value)
1131                 break;
1132         }
1133         if (t)
1134         {
1135             if (FcDebug () & FC_DBG_EDIT)
1136                 printf ("No match\n");
1137             continue;
1138         }
1139         if (FcDebug () & FC_DBG_EDIT)
1140         {
1141             printf ("Substitute ");
1142             FcSubstPrint (s);
1143         }
1144         for (e = s->edit; e; e = e->next)
1145         {
1146             /*
1147              * Evaluate the list of expressions
1148              */
1149             l = FcConfigValues (p, e->expr);
1150             /*
1151              * Locate any test associated with this field
1152              */
1153             for (t = s->test, i = 0; t; t = t->next, i++)
1154                 if (!FcStrCmpIgnoreCase ((FcChar8 *) t->field, (FcChar8 *) e->field))
1155                     break;
1156             switch (e->op) {
1157             case FcOpAssign:
1158                 /*
1159                  * If there was a test, then replace the matched
1160                  * value with the new list of values
1161                  */
1162                 if (t)
1163                 {
1164                     FcValueList *thisValue = st[i].value;
1165                     FcValueList *nextValue = thisValue ? thisValue->next : 0;
1166
1167                     /*
1168                      * Append the new list of values after the current value
1169                      */
1170                     FcConfigAdd (&st[i].elt->values, thisValue, FcTrue, l);
1171                     /*
1172                      * Delete the marked value
1173                      */
1174                     FcConfigDel (&st[i].elt->values, thisValue);
1175                     /*
1176                      * Adjust any pointers into the value list to ensure
1177                      * future edits occur at the same place
1178                      */
1179                     for (t = s->test, i = 0; t; t = t->next, i++)
1180                     {
1181                         if (st[i].value == thisValue)
1182                             st[i].value = nextValue;
1183                     }
1184                     break;
1185                 }
1186                 /* fall through ... */
1187             case FcOpAssignReplace:
1188                 /*
1189                  * Delete all of the values and insert
1190                  * the new set
1191                  */
1192                 FcConfigPatternDel (p, e->field);
1193                 FcConfigPatternAdd (p, e->field, l, FcTrue);
1194                 /*
1195                  * Adjust any pointers into the value list as they no
1196                  * longer point to anything valid
1197                  */
1198                 if (t)
1199                 {
1200                     FcPatternElt    *thisElt = st[i].elt;
1201                     for (t = s->test, i = 0; t; t = t->next, i++)
1202                     {
1203                         if (st[i].elt == thisElt)
1204                             st[i].value = 0;
1205                     }
1206                 }
1207                 break;
1208             case FcOpPrepend:
1209                 if (t)
1210                 {
1211                     FcConfigAdd (&st[i].elt->values, st[i].value, FcFalse, l);
1212                     break;
1213                 }
1214                 /* fall through ... */
1215             case FcOpPrependFirst:
1216                 FcConfigPatternAdd (p, e->field, l, FcFalse);
1217                 break;
1218             case FcOpAppend:
1219                 if (t)
1220                 {
1221                     FcConfigAdd (&st[i].elt->values, st[i].value, FcTrue, l);
1222                     break;
1223                 }
1224                 /* fall through ... */
1225             case FcOpAppendLast:
1226                 FcConfigPatternAdd (p, e->field, l, FcTrue);
1227                 break;
1228             default:
1229                 break;
1230             }
1231         }
1232         /*
1233          * Now go through the pattern and eliminate
1234          * any properties without data
1235          */
1236         for (e = s->edit; e; e = e->next)
1237             FcConfigPatternCanon (p, e->field);
1238
1239         if (FcDebug () & FC_DBG_EDIT)
1240         {
1241             printf ("FcConfigSubstitute edit");
1242             FcPatternPrint (p);
1243         }
1244     }
1245     FcMemFree (FC_MEM_SUBSTATE, config->maxObjects * sizeof (FcSubState));
1246     free (st);
1247     if (FcDebug () & FC_DBG_EDIT)
1248     {
1249         printf ("FcConfigSubstitute done");
1250         FcPatternPrint (p);
1251     }
1252     return FcTrue;
1253 }
1254
1255 #ifndef FONTCONFIG_PATH
1256 #define FONTCONFIG_PATH "/etc/fonts"
1257 #endif
1258
1259 #ifndef FONTCONFIG_FILE
1260 #define FONTCONFIG_FILE "fonts.conf"
1261 #endif
1262
1263 static FcChar8 *
1264 FcConfigFileExists (const FcChar8 *dir, const FcChar8 *file)
1265 {
1266     FcChar8    *path;
1267
1268     if (!dir)
1269         dir = (FcChar8 *) "";
1270     path = malloc (strlen ((char *) dir) + 1 + strlen ((char *) file) + 1);
1271     if (!path)
1272         return 0;
1273
1274     strcpy ((char *) path, (const char *) dir);
1275     /* make sure there's a single separating / */
1276     if ((!path[0] || path[strlen((char *) path)-1] != '/') && file[0] != '/')
1277         strcat ((char *) path, "/");
1278     strcat ((char *) path, (char *) file);
1279
1280     if (access ((char *) path, R_OK) == 0)
1281         return path;
1282
1283     free (path);
1284     return 0;
1285 }
1286
1287 static FcChar8 **
1288 FcConfigGetPath (void)
1289 {
1290     FcChar8    **path;
1291     FcChar8    *env, *e, *colon;
1292     FcChar8    *dir;
1293     int     npath;
1294     int     i;
1295
1296     npath = 2;  /* default dir + null */
1297     env = (FcChar8 *) getenv ("FONTCONFIG_PATH");
1298     if (env)
1299     {
1300         e = env;
1301         npath++;
1302         while (*e)
1303             if (*e++ == ':')
1304                 npath++;
1305     }
1306     path = calloc (npath, sizeof (FcChar8 *));
1307     if (!path)
1308         goto bail0;
1309     i = 0;
1310
1311     if (env)
1312     {
1313         e = env;
1314         while (*e)
1315         {
1316             colon = (FcChar8 *) strchr ((char *) e, ':');
1317             if (!colon)
1318                 colon = e + strlen ((char *) e);
1319             path[i] = malloc (colon - e + 1);
1320             if (!path[i])
1321                 goto bail1;
1322             strncpy ((char *) path[i], (const char *) e, colon - e);
1323             path[i][colon - e] = '\0';
1324             if (*colon)
1325                 e = colon + 1;
1326             else
1327                 e = colon;
1328             i++;
1329         }
1330     }
1331
1332     dir = (FcChar8 *) FONTCONFIG_PATH;
1333     path[i] = malloc (strlen ((char *) dir) + 1);
1334     if (!path[i])
1335         goto bail1;
1336     strcpy ((char *) path[i], (const char *) dir);
1337     return path;
1338
1339 bail1:
1340     for (i = 0; path[i]; i++)
1341         free (path[i]);
1342     free (path);
1343 bail0:
1344     return 0;
1345 }
1346
1347 static void
1348 FcConfigFreePath (FcChar8 **path)
1349 {
1350     FcChar8    **p;
1351
1352     for (p = path; *p; p++)
1353         free (*p);
1354     free (path);
1355 }
1356
1357 FcChar8 *
1358 FcConfigFilename (const FcChar8 *url)
1359 {
1360     FcChar8    *file, *dir, **path, **p;
1361
1362     if (!url || !*url)
1363     {
1364         url = (FcChar8 *) getenv ("FONTCONFIG_FILE");
1365         if (!url)
1366             url = (FcChar8 *) FONTCONFIG_FILE;
1367     }
1368     file = 0;
1369     switch (*url) {
1370     case '~':
1371         dir = (FcChar8 *) getenv ("HOME");
1372         if (dir)
1373             file = FcConfigFileExists (dir, url + 1);
1374         else
1375             file = 0;
1376         break;
1377     case '/':
1378         file = FcConfigFileExists (0, url);
1379         break;
1380     default:
1381         path = FcConfigGetPath ();
1382         if (!path)
1383             return 0;
1384         for (p = path; *p; p++)
1385         {
1386             file = FcConfigFileExists (*p, url);
1387             if (file)
1388                 break;
1389         }
1390         FcConfigFreePath (path);
1391         break;
1392     }
1393     return file;
1394 }
1395
1396 /*
1397  * Manage the application-specific fonts
1398  */
1399
1400 FcBool
1401 FcConfigAppFontAddFile (FcConfig    *config,
1402                         const FcChar8  *file)
1403 {
1404     FcFontSet   *set;
1405     FcStrSet    *subdirs;
1406     FcStrList   *sublist;
1407     FcChar8     *subdir;
1408
1409     if (!config)
1410     {
1411         config = FcConfigGetCurrent ();
1412         if (!config)
1413             return FcFalse;
1414     }
1415
1416     subdirs = FcStrSetCreate ();
1417     if (!subdirs)
1418         return FcFalse;
1419
1420     set = FcConfigGetFonts (config, FcSetApplication);
1421     if (!set)
1422     {
1423         set = FcFontSetCreate ();
1424         if (!set)
1425         {
1426             FcStrSetDestroy (subdirs);
1427             return FcFalse;
1428         }
1429         FcConfigSetFonts (config, set, FcSetApplication);
1430     }
1431
1432     if (!FcFileScan (set, subdirs, 0, config->blanks, file, FcFalse))
1433     {
1434         FcStrSetDestroy (subdirs);
1435         return FcFalse;
1436     }
1437     if ((sublist = FcStrListCreate (subdirs)))
1438     {
1439         while ((subdir = FcStrListNext (sublist)))
1440         {
1441             FcConfigAppFontAddDir (config, subdir);
1442         }
1443         FcStrListDone (sublist);
1444     }
1445     return FcTrue;
1446 }
1447
1448 FcBool
1449 FcConfigAppFontAddDir (FcConfig     *config,
1450                        const FcChar8   *dir)
1451 {
1452     FcFontSet   *set;
1453     FcStrSet    *subdirs;
1454     FcStrList   *sublist;
1455     FcChar8     *subdir;
1456
1457     if (!config)
1458     {
1459         config = FcConfigGetCurrent ();
1460         if (!config)
1461             return FcFalse;
1462     }
1463     subdirs = FcStrSetCreate ();
1464     if (!subdirs)
1465         return FcFalse;
1466
1467     set = FcConfigGetFonts (config, FcSetApplication);
1468     if (!set)
1469     {
1470         set = FcFontSetCreate ();
1471         if (!set)
1472         {
1473             FcStrSetDestroy (subdirs);
1474             return FcFalse;
1475         }
1476         FcConfigSetFonts (config, set, FcSetApplication);
1477     }
1478
1479     if (!FcDirScan (set, subdirs, 0, config->blanks, dir, FcFalse))
1480     {
1481         FcStrSetDestroy (subdirs);
1482         return FcFalse;
1483     }
1484     if ((sublist = FcStrListCreate (subdirs)))
1485     {
1486         while ((subdir = FcStrListNext (sublist)))
1487         {
1488             FcConfigAppFontAddDir (config, subdir);
1489         }
1490         FcStrListDone (sublist);
1491     }
1492     return FcTrue;
1493 }
1494
1495 void
1496 FcConfigAppFontClear (FcConfig      *config)
1497 {
1498     FcConfigSetFonts (config, 0, FcSetApplication);
1499 }