src/fccfg.c

   1 /*
   2  * $XFree86: xc/lib/fontconfig/src/fccfg.c,v 1.8 2002/06/02 19:51:36 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     *v)
 870 {
 871     FcValueList     *ret = 0;
 872     FcExpr          *e = t->expr;
 873     FcValue         value;
 874
 875     while (e)
 876     {
 877         if (e->op == FcOpComma)
 878         {
 879             value = FcConfigEvaluate (p, e->u.tree.left);
 880             e = e->u.tree.right;
 881         }
 882         else
 883         {
 884             value = FcConfigEvaluate (p, e);
 885             e = 0;
 886         }
 887
 888         for (; v; v = v->next)
 889         {
 890             if (FcConfigCompareValue (v->value, t->op, value))
 891             {
 892                 if (!ret)
 893                     ret = v;
 894             }
 895             else
 896             {
 897                 if (t->qual == FcQualAll)
 898                 {
 899                     ret = 0;
 900                     break;
 901                 }
 902             }
 903         }
 904     }
 905     FcValueDestroy (value);
 906     return ret;
 907 }
 908
 909 static FcValueList *
 910 FcConfigValues (FcPattern *p, FcExpr *e)
 911 {
 912     FcValueList *l;
 913
 914     if (!e)
 915         return 0;
 916     l = (FcValueList *) malloc (sizeof (FcValueList));
 917     if (!l)
 918         return 0;
 919     FcMemAlloc (FC_MEM_VALLIST, sizeof (FcValueList));
 920     if (e->op == FcOpComma)
 921     {
 922         l->value = FcConfigEvaluate (p, e->u.tree.left);
 923         l->next  = FcConfigValues (p, e->u.tree.right);
 924     }
 925     else
 926     {
 927         l->value = FcConfigEvaluate (p, e);
 928         l->next  = 0;
 929     }
 930     while (l && l->value.type == FcTypeVoid)
 931     {
 932         FcValueList     *next = l->next;
 933
 934         FcMemFree (FC_MEM_VALLIST, sizeof (FcValueList));
 935         free (l);
 936         l = next;
 937     }
 938     return l;
 939 }
 940
 941 static FcBool
 942 FcConfigAdd (FcValueList    **head,
 943              FcValueList    *position,
 944              FcBool         append,
 945              FcValueList    *new)
 946 {
 947     FcValueList    **prev, *last;
 948
 949     if (append)
 950     {
 951         if (position)
 952             prev = &position->next;
 953         else
 954             for (prev = head; *prev; prev = &(*prev)->next)
 955                 ;
 956     }
 957     else
 958     {
 959         if (position)
 960         {
 961             for (prev = head; *prev; prev = &(*prev)->next)
 962             {
 963                 if (*prev == position)
 964                     break;
 965             }
 966         }
 967         else
 968             prev = head;
 969
 970         if (FcDebug () & FC_DBG_EDIT)
 971         {
 972             if (!*prev)
 973                 printf ("position not on list\n");
 974         }
 975     }
 976
 977     if (FcDebug () & FC_DBG_EDIT)
 978     {
 979         printf ("%s list before ", append ? "Append" : "Prepend");
 980         FcValueListPrint (*head);
 981         printf ("\n");
 982     }
 983
 984     if (new)
 985     {
 986         last = new;
 987         while (last->next)
 988             last = last->next;
 989
 990         last->next = *prev;
 991         *prev = new;
 992     }
 993
 994     if (FcDebug () & FC_DBG_EDIT)
 995     {
 996         printf ("%s list after ", append ? "Append" : "Prepend");
 997         FcValueListPrint (*head);
 998         printf ("\n");
 999     }
1000
1001     return FcTrue;
1002 }
1003
1004 static void
1005 FcConfigDel (FcValueList    **head,
1006              FcValueList    *position)
1007 {
1008     FcValueList    **prev;
1009
1010     for (prev = head; *prev; prev = &(*prev)->next)
1011     {
1012         if (*prev == position)
1013         {
1014             *prev = position->next;
1015             position->next = 0;
1016             FcValueListDestroy (position);
1017             break;
1018         }
1019     }
1020 }
1021
1022 static void
1023 FcConfigPatternAdd (FcPattern   *p,
1024                     const char  *object,
1025                     FcValueList *list,
1026                     FcBool      append)
1027 {
1028     if (list)
1029     {
1030         FcPatternElt    *e = FcPatternFind (p, object, FcTrue);
1031
1032         if (!e)
1033             return;
1034         FcConfigAdd (&e->values, 0, append, list);
1035     }
1036 }
1037
1038 /*
1039  * Delete all values associated with a field
1040  */
1041 static void
1042 FcConfigPatternDel (FcPattern   *p,
1043                     const char  *object)
1044 {
1045     FcPatternElt    *e = FcPatternFind (p, object, FcFalse);
1046     if (!e)
1047         return;
1048     while (e->values)
1049         FcConfigDel (&e->values, e->values);
1050 }
1051
1052 static void
1053 FcConfigPatternCanon (FcPattern     *p,
1054                       const char    *object)
1055 {
1056     FcPatternElt    *e = FcPatternFind (p, object, FcFalse);
1057     if (!e)
1058         return;
1059     if (!e->values)
1060         FcPatternDel (p, object);
1061 }
1062
1063 FcBool
1064 FcConfigSubstitute (FcConfig    *config,
1065                     FcPattern   *p,
1066                     FcMatchKind kind)
1067 {
1068     FcSubst         *s;
1069     FcSubState      *st;
1070     int             i;
1071     FcTest          *t;
1072     FcEdit          *e;
1073     FcValueList     *l;
1074
1075     if (!config)
1076     {
1077         config = FcConfigGetCurrent ();
1078         if (!config)
1079             return FcFalse;
1080     }
1081
1082     st = (FcSubState *) malloc (config->maxObjects * sizeof (FcSubState));
1083     if (!st && config->maxObjects)
1084         return FcFalse;
1085     FcMemAlloc (FC_MEM_SUBSTATE, config->maxObjects * sizeof (FcSubState));
1086
1087     if (FcDebug () & FC_DBG_EDIT)
1088     {
1089         printf ("FcConfigSubstitute ");
1090         FcPatternPrint (p);
1091     }
1092     if (kind == FcMatchPattern)
1093         s = config->substPattern;
1094     else
1095         s = config->substFont;
1096     for (; s; s = s->next)
1097     {
1098         /*
1099          * Check the tests to see if
1100          * they all match the pattern
1101          */
1102         for (t = s->test, i = 0; t; t = t->next, i++)
1103         {
1104             if (FcDebug () & FC_DBG_EDIT)
1105             {
1106                 printf ("FcConfigSubstitute test ");
1107                 FcTestPrint (t);
1108             }
1109             st[i].elt = FcPatternFind (p, t->field, FcFalse);
1110             /*
1111              * If there's no such field in the font,
1112              * then FcQualAll matches while FcQualAny does not
1113              */
1114             if (!st[i].elt)
1115             {
1116                 if (t->qual == FcQualAll)
1117                 {
1118                     st[i].value = 0;
1119                     continue;
1120                 }
1121                 else
1122                     break;
1123             }
1124             /*
1125              * Check to see if there is a match, mark the location
1126              * to apply match-relative edits
1127              */
1128             st[i].value = FcConfigMatchValueList (p, t, st[i].elt->values);
1129             if (!st[i].value)
1130                 break;
1131         }
1132         if (t)
1133         {
1134             if (FcDebug () & FC_DBG_EDIT)
1135                 printf ("No match\n");
1136             continue;
1137         }
1138         if (FcDebug () & FC_DBG_EDIT)
1139         {
1140             printf ("Substitute ");
1141             FcSubstPrint (s);
1142         }
1143         for (e = s->edit; e; e = e->next)
1144         {
1145             /*
1146              * Evaluate the list of expressions
1147              */
1148             l = FcConfigValues (p, e->expr);
1149             /*
1150              * Locate any test associated with this field
1151              */
1152             for (t = s->test, i = 0; t; t = t->next, i++)
1153                 if (!FcStrCmpIgnoreCase ((FcChar8 *) t->field, (FcChar8 *) e->field))
1154                     break;
1155             switch (e->op) {
1156             case FcOpAssign:
1157                 /*
1158                  * If there was a test, then replace the matched
1159                  * value with the new list of values
1160                  */
1161                 if (t && st[i].elt)
1162                 {
1163                     FcValueList *thisValue = st[i].value;
1164                     FcValueList *nextValue = thisValue ? thisValue->next : 0;
1165
1166                     /*
1167                      * Append the new list of values after the current value
1168                      */
1169                     FcConfigAdd (&st[i].elt->values, thisValue, FcTrue, l);
1170                     /*
1171                      * Delete the marked value
1172                      */
1173                     FcConfigDel (&st[i].elt->values, thisValue);
1174                     /*
1175                      * Adjust any pointers into the value list to ensure
1176                      * future edits occur at the same place
1177                      */
1178                     for (t = s->test, i = 0; t; t = t->next, i++)
1179                     {
1180                         if (st[i].value == thisValue)
1181                             st[i].value = nextValue;
1182                     }
1183                     break;
1184                 }
1185                 /* fall through ... */
1186             case FcOpAssignReplace:
1187                 /*
1188                  * Delete all of the values and insert
1189                  * the new set
1190                  */
1191                 FcConfigPatternDel (p, e->field);
1192                 FcConfigPatternAdd (p, e->field, l, FcTrue);
1193                 /*
1194                  * Adjust any pointers into the value list as they no
1195                  * longer point to anything valid
1196                  */
1197                 if (t)
1198                 {
1199                     FcPatternElt    *thisElt = st[i].elt;
1200                     for (t = s->test, i = 0; t; t = t->next, i++)
1201                     {
1202                         if (st[i].elt == thisElt)
1203                             st[i].value = 0;
1204                     }
1205                 }
1206                 break;
1207             case FcOpPrepend:
1208                 if (t)
1209                 {
1210                     FcConfigAdd (&st[i].elt->values, st[i].value, FcFalse, l);
1211                     break;
1212                 }
1213                 /* fall through ... */
1214             case FcOpPrependFirst:
1215                 FcConfigPatternAdd (p, e->field, l, FcFalse);
1216                 break;
1217             case FcOpAppend:
1218                 if (t)
1219                 {
1220                     FcConfigAdd (&st[i].elt->values, st[i].value, FcTrue, l);
1221                     break;
1222                 }
1223                 /* fall through ... */
1224             case FcOpAppendLast:
1225                 FcConfigPatternAdd (p, e->field, l, FcTrue);
1226                 break;
1227             default:
1228                 break;
1229             }
1230         }
1231         /*
1232          * Now go through the pattern and eliminate
1233          * any properties without data
1234          */
1235         for (e = s->edit; e; e = e->next)
1236             FcConfigPatternCanon (p, e->field);
1237
1238         if (FcDebug () & FC_DBG_EDIT)
1239         {
1240             printf ("FcConfigSubstitute edit");
1241             FcPatternPrint (p);
1242         }
1243     }
1244     FcMemFree (FC_MEM_SUBSTATE, config->maxObjects * sizeof (FcSubState));
1245     free (st);
1246     if (FcDebug () & FC_DBG_EDIT)
1247     {
1248         printf ("FcConfigSubstitute done");
1249         FcPatternPrint (p);
1250     }
1251     return FcTrue;
1252 }
1253
1254 #ifndef FONTCONFIG_PATH
1255 #define FONTCONFIG_PATH "/etc/fonts"
1256 #endif
1257
1258 #ifndef FONTCONFIG_FILE
1259 #define FONTCONFIG_FILE "fonts.conf"
1260 #endif
1261
1262 static FcChar8 *
1263 FcConfigFileExists (const FcChar8 *dir, const FcChar8 *file)
1264 {
1265     FcChar8    *path;
1266
1267     if (!dir)
1268         dir = (FcChar8 *) "";
1269     path = malloc (strlen ((char *) dir) + 1 + strlen ((char *) file) + 1);
1270     if (!path)
1271         return 0;
1272
1273     strcpy ((char *) path, (const char *) dir);
1274     /* make sure there's a single separating / */
1275     if ((!path[0] || path[strlen((char *) path)-1] != '/') && file[0] != '/')
1276         strcat ((char *) path, "/");
1277     strcat ((char *) path, (char *) file);
1278
1279     if (access ((char *) path, R_OK) == 0)
1280         return path;
1281
1282     free (path);
1283     return 0;
1284 }
1285
1286 static FcChar8 **
1287 FcConfigGetPath (void)
1288 {
1289     FcChar8    **path;
1290     FcChar8    *env, *e, *colon;
1291     FcChar8    *dir;
1292     int     npath;
1293     int     i;
1294
1295     npath = 2;  /* default dir + null */
1296     env = (FcChar8 *) getenv ("FONTCONFIG_PATH");
1297     if (env)
1298     {
1299         e = env;
1300         npath++;
1301         while (*e)
1302             if (*e++ == ':')
1303                 npath++;
1304     }
1305     path = calloc (npath, sizeof (FcChar8 *));
1306     if (!path)
1307         goto bail0;
1308     i = 0;
1309
1310     if (env)
1311     {
1312         e = env;
1313         while (*e)
1314         {
1315             colon = (FcChar8 *) strchr ((char *) e, ':');
1316             if (!colon)
1317                 colon = e + strlen ((char *) e);
1318             path[i] = malloc (colon - e + 1);
1319             if (!path[i])
1320                 goto bail1;
1321             strncpy ((char *) path[i], (const char *) e, colon - e);
1322             path[i][colon - e] = '\0';
1323             if (*colon)
1324                 e = colon + 1;
1325             else
1326                 e = colon;
1327             i++;
1328         }
1329     }
1330
1331     dir = (FcChar8 *) FONTCONFIG_PATH;
1332     path[i] = malloc (strlen ((char *) dir) + 1);
1333     if (!path[i])
1334         goto bail1;
1335     strcpy ((char *) path[i], (const char *) dir);
1336     return path;
1337
1338 bail1:
1339     for (i = 0; path[i]; i++)
1340         free (path[i]);
1341     free (path);
1342 bail0:
1343     return 0;
1344 }
1345
1346 static void
1347 FcConfigFreePath (FcChar8 **path)
1348 {
1349     FcChar8    **p;
1350
1351     for (p = path; *p; p++)
1352         free (*p);
1353     free (path);
1354 }
1355
1356 FcChar8 *
1357 FcConfigFilename (const FcChar8 *url)
1358 {
1359     FcChar8    *file, *dir, **path, **p;
1360
1361     if (!url || !*url)
1362     {
1363         url = (FcChar8 *) getenv ("FONTCONFIG_FILE");
1364         if (!url)
1365             url = (FcChar8 *) FONTCONFIG_FILE;
1366     }
1367     file = 0;
1368     switch (*url) {
1369     case '~':
1370         dir = (FcChar8 *) getenv ("HOME");
1371         if (dir)
1372             file = FcConfigFileExists (dir, url + 1);
1373         else
1374             file = 0;
1375         break;
1376     case '/':
1377         file = FcConfigFileExists (0, url);
1378         break;
1379     default:
1380         path = FcConfigGetPath ();
1381         if (!path)
1382             return 0;
1383         for (p = path; *p; p++)
1384         {
1385             file = FcConfigFileExists (*p, url);
1386             if (file)
1387                 break;
1388         }
1389         FcConfigFreePath (path);
1390         break;
1391     }
1392     return file;
1393 }
1394
1395 /*
1396  * Manage the application-specific fonts
1397  */
1398
1399 FcBool
1400 FcConfigAppFontAddFile (FcConfig    *config,
1401                         const FcChar8  *file)
1402 {
1403     FcFontSet   *set;
1404     FcStrSet    *subdirs;
1405     FcStrList   *sublist;
1406     FcChar8     *subdir;
1407
1408     if (!config)
1409     {
1410         config = FcConfigGetCurrent ();
1411         if (!config)
1412             return FcFalse;
1413     }
1414
1415     subdirs = FcStrSetCreate ();
1416     if (!subdirs)
1417         return FcFalse;
1418
1419     set = FcConfigGetFonts (config, FcSetApplication);
1420     if (!set)
1421     {
1422         set = FcFontSetCreate ();
1423         if (!set)
1424         {
1425             FcStrSetDestroy (subdirs);
1426             return FcFalse;
1427         }
1428         FcConfigSetFonts (config, set, FcSetApplication);
1429     }
1430
1431     if (!FcFileScan (set, subdirs, 0, config->blanks, file, FcFalse))
1432     {
1433         FcStrSetDestroy (subdirs);
1434         return FcFalse;
1435     }
1436     if ((sublist = FcStrListCreate (subdirs)))
1437     {
1438         while ((subdir = FcStrListNext (sublist)))
1439         {
1440             FcConfigAppFontAddDir (config, subdir);
1441         }
1442         FcStrListDone (sublist);
1443     }
1444     return FcTrue;
1445 }
1446
1447 FcBool
1448 FcConfigAppFontAddDir (FcConfig     *config,
1449                        const FcChar8   *dir)
1450 {
1451     FcFontSet   *set;
1452     FcStrSet    *subdirs;
1453     FcStrList   *sublist;
1454     FcChar8     *subdir;
1455
1456     if (!config)
1457     {
1458         config = FcConfigGetCurrent ();
1459         if (!config)
1460             return FcFalse;
1461     }
1462     subdirs = FcStrSetCreate ();
1463     if (!subdirs)
1464         return FcFalse;
1465
1466     set = FcConfigGetFonts (config, FcSetApplication);
1467     if (!set)
1468     {
1469         set = FcFontSetCreate ();
1470         if (!set)
1471         {
1472             FcStrSetDestroy (subdirs);
1473             return FcFalse;
1474         }
1475         FcConfigSetFonts (config, set, FcSetApplication);
1476     }
1477
1478     if (!FcDirScan (set, subdirs, 0, config->blanks, dir, FcFalse))
1479     {
1480         FcStrSetDestroy (subdirs);
1481         return FcFalse;
1482     }
1483     if ((sublist = FcStrListCreate (subdirs)))
1484     {
1485         while ((subdir = FcStrListNext (sublist)))
1486         {
1487             FcConfigAppFontAddDir (config, subdir);
1488         }
1489         FcStrListDone (sublist);
1490     }
1491     return FcTrue;
1492 }
1493
1494 void
1495 FcConfigAppFontClear (FcConfig      *config)
1496 {
1497     FcConfigSetFonts (config, 0, FcSetApplication);
1498 }