src/fcname.c

   1 /*
   2  * $RCSId: xc/lib/fontconfig/src/fcname.c,v 1.15 2002/09/26 00:17:28 keithp Exp $
   3  *
   4  * Copyright © 2000 Keith Packard
   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 <ctype.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdio.h>
  29 #include "fcint.h"
  30
  31 static const FcObjectType _FcBaseObjectTypes[] = {
  32     { FC_FAMILY,        FcTypeString, },
  33     { FC_STYLE,         FcTypeString, },
  34     { FC_SLANT,         FcTypeInteger, },
  35     { FC_WEIGHT,        FcTypeInteger, },
  36     { FC_WIDTH,         FcTypeInteger, },
  37     { FC_SIZE,          FcTypeDouble, },
  38     { FC_ASPECT,        FcTypeDouble, },
  39     { FC_PIXEL_SIZE,    FcTypeDouble, },
  40     { FC_SPACING,       FcTypeInteger, },
  41     { FC_FOUNDRY,       FcTypeString, },
  42 /*    { FC_CORE,                FcTypeBool, }, */
  43     { FC_ANTIALIAS,     FcTypeBool, },
  44     { FC_HINTING,       FcTypeBool, },
  45     { FC_VERTICAL_LAYOUT,   FcTypeBool, },
  46     { FC_AUTOHINT,      FcTypeBool, },
  47     { FC_GLOBAL_ADVANCE,    FcTypeBool, },
  48 /*    { FC_XLFD,                FcTypeString, }, */
  49     { FC_FILE,          FcTypeString, },
  50     { FC_INDEX,         FcTypeInteger, },
  51     { FC_RASTERIZER,    FcTypeString, },
  52     { FC_OUTLINE,       FcTypeBool, },
  53     { FC_SCALABLE,      FcTypeBool, },
  54     { FC_DPI,           FcTypeDouble },
  55     { FC_RGBA,          FcTypeInteger, },
  56     { FC_SCALE,         FcTypeDouble, },
  57 /*    { FC_RENDER,      FcTypeBool, },*/
  58     { FC_MINSPACE,      FcTypeBool, },
  59     { FC_CHAR_WIDTH,    FcTypeInteger },
  60     { FC_CHAR_HEIGHT,   FcTypeInteger },
  61     { FC_MATRIX,        FcTypeMatrix },
  62     { FC_CHARSET,       FcTypeCharSet },
  63     { FC_LANG,          FcTypeLangSet },
  64     { FC_FONTVERSION,   FcTypeInteger },
  65 };
  66
  67 #define NUM_OBJECT_TYPES    (sizeof _FcBaseObjectTypes / sizeof _FcBaseObjectTypes[0])
  68
  69 typedef struct _FcObjectTypeList    FcObjectTypeList;
  70
  71 struct _FcObjectTypeList {
  72     const FcObjectTypeList  *next;
  73     const FcObjectType      *types;
  74     int                     ntypes;
  75 };
  76
  77 static const FcObjectTypeList _FcBaseObjectTypesList = {
  78     0,
  79     _FcBaseObjectTypes,
  80     NUM_OBJECT_TYPES
  81 };
  82
  83 static const FcObjectTypeList   *_FcObjectTypes = &_FcBaseObjectTypesList;
  84
  85 FcBool
  86 FcNameRegisterObjectTypes (const FcObjectType *types, int ntypes)
  87 {
  88     FcObjectTypeList    *l;
  89
  90     l = (FcObjectTypeList *) malloc (sizeof (FcObjectTypeList));
  91     if (!l)
  92         return FcFalse;
  93     FcMemAlloc (FC_MEM_OBJECTTYPE, sizeof (FcObjectTypeList));
  94     l->types = types;
  95     l->ntypes = ntypes;
  96     l->next = _FcObjectTypes;
  97     _FcObjectTypes = l;
  98     return FcTrue;
  99 }
 100
 101 FcBool
 102 FcNameUnregisterObjectTypes (const FcObjectType *types, int ntypes)
 103 {
 104     const FcObjectTypeList      *l, **prev;
 105
 106     for (prev = &_FcObjectTypes;
 107          (l = *prev);
 108          prev = (const FcObjectTypeList **) &(l->next))
 109     {
 110         if (l->types == types && l->ntypes == ntypes)
 111         {
 112             *prev = l->next;
 113             FcMemFree (FC_MEM_OBJECTTYPE, sizeof (FcObjectTypeList));
 114             free ((void *) l);
 115             return FcTrue;
 116         }
 117     }
 118     return FcFalse;
 119 }
 120
 121 const FcObjectType *
 122 FcNameGetObjectType (const char *object)
 123 {
 124     int                     i;
 125     const FcObjectTypeList  *l;
 126     const FcObjectType      *t;
 127
 128     for (l = _FcObjectTypes; l; l = l->next)
 129     {
 130         for (i = 0; i < l->ntypes; i++)
 131         {
 132             t = &l->types[i];
 133             if (!strcmp (object, t->object))
 134                 return t;
 135         }
 136     }
 137     return 0;
 138 }
 139
 140 static const FcConstant _FcBaseConstants[] = {
 141     { (FcChar8 *) "thin",           "weight",   FC_WEIGHT_THIN, },
 142     { (FcChar8 *) "extralight",     "weight",   FC_WEIGHT_EXTRALIGHT, },
 143     { (FcChar8 *) "ultralight",     "weight",   FC_WEIGHT_EXTRALIGHT, },
 144     { (FcChar8 *) "light",          "weight",   FC_WEIGHT_LIGHT, },
 145     { (FcChar8 *) "regular",        "weight",   FC_WEIGHT_REGULAR, },
 146     { (FcChar8 *) "medium",         "weight",   FC_WEIGHT_MEDIUM, },
 147     { (FcChar8 *) "demibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 148     { (FcChar8 *) "semibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 149     { (FcChar8 *) "bold",           "weight",   FC_WEIGHT_BOLD, },
 150     { (FcChar8 *) "extrabold",      "weight",   FC_WEIGHT_EXTRABOLD, },
 151     { (FcChar8 *) "ultrabold",      "weight",   FC_WEIGHT_EXTRABOLD, },
 152     { (FcChar8 *) "black",          "weight",   FC_WEIGHT_BLACK, },
 153
 154     { (FcChar8 *) "roman",          "slant",    FC_SLANT_ROMAN, },
 155     { (FcChar8 *) "italic",         "slant",    FC_SLANT_ITALIC, },
 156     { (FcChar8 *) "oblique",        "slant",    FC_SLANT_OBLIQUE, },
 157
 158     { (FcChar8 *) "ultracondensed", "width",    FC_WIDTH_ULTRACONDENSED },
 159     { (FcChar8 *) "extracondensed", "width",    FC_WIDTH_EXTRACONDENSED },
 160     { (FcChar8 *) "condensed",      "width",    FC_WIDTH_CONDENSED },
 161     { (FcChar8 *) "semicondensed", "width",     FC_WIDTH_SEMICONDENSED },
 162     { (FcChar8 *) "normal",         "width",    FC_WIDTH_NORMAL },
 163     { (FcChar8 *) "semiexpanded",   "width",    FC_WIDTH_SEMIEXPANDED },
 164     { (FcChar8 *) "expanded",       "width",    FC_WIDTH_EXPANDED },
 165     { (FcChar8 *) "extraexpanded",  "width",    FC_WIDTH_EXTRAEXPANDED },
 166     { (FcChar8 *) "ultraexpanded",  "width",    FC_WIDTH_ULTRAEXPANDED },
 167
 168     { (FcChar8 *) "proportional",   "spacing",  FC_PROPORTIONAL, },
 169     { (FcChar8 *) "mono",           "spacing",  FC_MONO, },
 170     { (FcChar8 *) "charcell",       "spacing",  FC_CHARCELL, },
 171
 172     { (FcChar8 *) "unknown",        "rgba",         FC_RGBA_UNKNOWN },
 173     { (FcChar8 *) "rgb",            "rgba",         FC_RGBA_RGB, },
 174     { (FcChar8 *) "bgr",            "rgba",         FC_RGBA_BGR, },
 175     { (FcChar8 *) "vrgb",           "rgba",         FC_RGBA_VRGB },
 176     { (FcChar8 *) "vbgr",           "rgba",         FC_RGBA_VBGR },
 177     { (FcChar8 *) "none",           "rgba",         FC_RGBA_NONE },
 178 };
 179
 180 #define NUM_FC_CONSTANTS   (sizeof _FcBaseConstants/sizeof _FcBaseConstants[0])
 181
 182 typedef struct _FcConstantList FcConstantList;
 183
 184 struct _FcConstantList {
 185     const FcConstantList    *next;
 186     const FcConstant        *consts;
 187     int                     nconsts;
 188 };
 189
 190 static const FcConstantList _FcBaseConstantList = {
 191     0,
 192     _FcBaseConstants,
 193     NUM_FC_CONSTANTS
 194 };
 195
 196 static const FcConstantList     *_FcConstants = &_FcBaseConstantList;
 197
 198 FcBool
 199 FcNameRegisterConstants (const FcConstant *consts, int nconsts)
 200 {
 201     FcConstantList      *l;
 202
 203     l = (FcConstantList *) malloc (sizeof (FcConstantList));
 204     if (!l)
 205         return FcFalse;
 206     FcMemAlloc (FC_MEM_CONSTANT, sizeof (FcConstantList));
 207     l->consts = consts;
 208     l->nconsts = nconsts;
 209     l->next = _FcConstants;
 210     _FcConstants = l;
 211     return FcTrue;
 212 }
 213
 214 FcBool
 215 FcNameUnregisterConstants (const FcConstant *consts, int nconsts)
 216 {
 217     const FcConstantList        *l, **prev;
 218
 219     for (prev = &_FcConstants;
 220          (l = *prev);
 221          prev = (const FcConstantList **) &(l->next))
 222     {
 223         if (l->consts == consts && l->nconsts == nconsts)
 224         {
 225             *prev = l->next;
 226             FcMemFree (FC_MEM_CONSTANT, sizeof (FcConstantList));
 227             free ((void *) l);
 228             return FcTrue;
 229         }
 230     }
 231     return FcFalse;
 232 }
 233
 234 const FcConstant *
 235 FcNameGetConstant (FcChar8 *string)
 236 {
 237     const FcConstantList    *l;
 238     int                     i;
 239
 240     for (l = _FcConstants; l; l = l->next)
 241     {
 242         for (i = 0; i < l->nconsts; i++)
 243             if (!FcStrCmpIgnoreCase (string, l->consts[i].name))
 244                 return &l->consts[i];
 245     }
 246     return 0;
 247 }
 248
 249 FcBool
 250 FcNameConstant (FcChar8 *string, int *result)
 251 {
 252     const FcConstant    *c;
 253
 254     if ((c = FcNameGetConstant(string)))
 255     {
 256         *result = c->value;
 257         return FcTrue;
 258     }
 259     return FcFalse;
 260 }
 261
 262 FcBool
 263 FcNameBool (FcChar8 *v, FcBool *result)
 264 {
 265     char    c0, c1;
 266
 267     c0 = *v;
 268     c0 = FcToLower (c0);
 269     if (c0 == 't' || c0 == 'y' || c0 == '1')
 270     {
 271         *result = FcTrue;
 272         return FcTrue;
 273     }
 274     if (c0 == 'f' || c0 == 'n' || c0 == '0')
 275     {
 276         *result = FcFalse;
 277         return FcTrue;
 278     }
 279     if (c0 == 'o')
 280     {
 281         c1 = v[1];
 282         c1 = FcToLower (c1);
 283         if (c1 == 'n')
 284         {
 285             *result = FcTrue;
 286             return FcTrue;
 287         }
 288         if (c1 == 'f')
 289         {
 290             *result = FcFalse;
 291             return FcTrue;
 292         }
 293     }
 294     return FcFalse;
 295 }
 296
 297 static FcValue
 298 FcNameConvert (FcType type, FcChar8 *string, FcMatrix *m)
 299 {
 300     FcValue     v;
 301
 302     v.type = type;
 303     switch (v.type) {
 304     case FcTypeInteger:
 305         if (!FcNameConstant (string, &v.u.i))
 306             v.u.i = atoi ((char *) string);
 307         break;
 308     case FcTypeString:
 309         v.u.s = string;
 310         break;
 311     case FcTypeBool:
 312         if (!FcNameBool (string, &v.u.b))
 313             v.u.b = FcFalse;
 314         break;
 315     case FcTypeDouble:
 316         v.u.d = strtod ((char *) string, 0);
 317         break;
 318     case FcTypeMatrix:
 319         v.u.m = m;
 320         sscanf ((char *) string, "%lg %lg %lg %lg", &m->xx, &m->xy, &m->yx, &m->yy);
 321         break;
 322     case FcTypeCharSet:
 323         v.u.c = FcNameParseCharSet (string);
 324         break;
 325     case FcTypeLangSet:
 326         v.u.l = FcNameParseLangSet (string);
 327         break;
 328     default:
 329         break;
 330     }
 331     return v;
 332 }
 333
 334 static const FcChar8 *
 335 FcNameFindNext (const FcChar8 *cur, const char *delim, FcChar8 *save, FcChar8 *last)
 336 {
 337     FcChar8    c;
 338
 339     while ((c = *cur))
 340     {
 341         if (c == '\\')
 342         {
 343             ++cur;
 344             if (!(c = *cur))
 345                 break;
 346         }
 347         else if (strchr (delim, c))
 348             break;
 349         ++cur;
 350         *save++ = c;
 351     }
 352     *save = 0;
 353     *last = *cur;
 354     if (*cur)
 355         cur++;
 356     return cur;
 357 }
 358
 359 FcPattern *
 360 FcNameParse (const FcChar8 *name)
 361 {
 362     FcChar8             *save;
 363     FcPattern           *pat;
 364     double              d;
 365     FcChar8             *e;
 366     FcChar8             delim;
 367     FcValue             v;
 368     FcMatrix            m;
 369     const FcObjectType  *t;
 370     const FcConstant    *c;
 371
 372     /* freed below */
 373     save = malloc (strlen ((char *) name) + 1);
 374     if (!save)
 375         goto bail0;
 376     pat = FcPatternCreate ();
 377     if (!pat)
 378         goto bail1;
 379
 380     for (;;)
 381     {
 382         name = FcNameFindNext (name, "-,:", save, &delim);
 383         if (save[0])
 384         {
 385             if (!FcPatternAddString (pat, FC_FAMILY, save))
 386                 goto bail2;
 387         }
 388         if (delim != ',')
 389             break;
 390     }
 391     if (delim == '-')
 392     {
 393         for (;;)
 394         {
 395             name = FcNameFindNext (name, "-,:", save, &delim);
 396             d = strtod ((char *) save, (char **) &e);
 397             if (e != save)
 398             {
 399                 if (!FcPatternAddDouble (pat, FC_SIZE, d))
 400                     goto bail2;
 401             }
 402             if (delim != ',')
 403                 break;
 404         }
 405     }
 406     while (delim == ':')
 407     {
 408         name = FcNameFindNext (name, "=_:", save, &delim);
 409         if (save[0])
 410         {
 411             if (delim == '=' || delim == '_')
 412             {
 413                 t = FcNameGetObjectType ((char *) save);
 414                 for (;;)
 415                 {
 416                     name = FcNameFindNext (name, ":,", save, &delim);
 417                     if (t)
 418                     {
 419                         v = FcNameConvert (t->type, save, &m);
 420                         if (!FcPatternAdd (pat, t->object, v, FcTrue))
 421                         {
 422                             switch (v.type) {
 423                             case FcTypeCharSet:
 424                                 FcCharSetDestroy ((FcCharSet *) v.u.c);
 425                                 break;
 426                             case FcTypeLangSet:
 427                                 FcLangSetDestroy ((FcLangSet *) v.u.l);
 428                                 break;
 429                             default:
 430                                 break;
 431                             }
 432                             goto bail2;
 433                         }
 434                         switch (v.type) {
 435                         case FcTypeCharSet:
 436                             FcCharSetDestroy ((FcCharSet *) v.u.c);
 437                             break;
 438                         case FcTypeLangSet:
 439                             FcLangSetDestroy ((FcLangSet *) v.u.l);
 440                             break;
 441                         default:
 442                             break;
 443                         }
 444                     }
 445                     if (delim != ',')
 446                         break;
 447                 }
 448             }
 449             else
 450             {
 451                 if ((c = FcNameGetConstant (save)))
 452                 {
 453                     if (!FcPatternAddInteger (pat, c->object, c->value))
 454                         goto bail2;
 455                 }
 456             }
 457         }
 458     }
 459
 460     free (save);
 461     return pat;
 462
 463 bail2:
 464     FcPatternDestroy (pat);
 465 bail1:
 466     free (save);
 467 bail0:
 468     return 0;
 469 }
 470 static FcBool
 471 FcNameUnparseString (FcStrBuf       *buf,
 472                      const FcChar8  *string,
 473                      const FcChar8  *escape)
 474 {
 475     FcChar8 c;
 476     while ((c = *string++))
 477     {
 478         if (escape && strchr ((char *) escape, (char) c))
 479         {
 480             if (!FcStrBufChar (buf, escape[0]))
 481                 return FcFalse;
 482         }
 483         if (!FcStrBufChar (buf, c))
 484             return FcFalse;
 485     }
 486     return FcTrue;
 487 }
 488
 489 static FcBool
 490 FcNameUnparseValue (FcStrBuf    *buf,
 491                     FcValue     v,
 492                     FcChar8     *escape)
 493 {
 494     FcChar8     temp[1024];
 495
 496     switch (v.type) {
 497     case FcTypeVoid:
 498         return FcTrue;
 499     case FcTypeInteger:
 500         sprintf ((char *) temp, "%d", v.u.i);
 501         return FcNameUnparseString (buf, temp, 0);
 502     case FcTypeDouble:
 503         sprintf ((char *) temp, "%g", v.u.d);
 504         return FcNameUnparseString (buf, temp, 0);
 505     case FcTypeString:
 506         return FcNameUnparseString (buf, v.u.s, escape);
 507     case FcTypeBool:
 508         return FcNameUnparseString (buf, v.u.b ? (FcChar8 *) "True" : (FcChar8 *) "False", 0);
 509     case FcTypeMatrix:
 510         sprintf ((char *) temp, "%g %g %g %g",
 511                  v.u.m->xx, v.u.m->xy, v.u.m->yx, v.u.m->yy);
 512         return FcNameUnparseString (buf, temp, 0);
 513     case FcTypeCharSet:
 514         return FcNameUnparseCharSet (buf, v.u.c);
 515     case FcTypeLangSet:
 516         return FcNameUnparseLangSet (buf, v.u.l);
 517     case FcTypeFTFace:
 518         return FcTrue;
 519     }
 520     return FcFalse;
 521 }
 522
 523 static FcBool
 524 FcNameUnparseValueList (FcStrBuf        *buf,
 525                         FcValueList     *v,
 526                         FcChar8         *escape)
 527 {
 528     while (v)
 529     {
 530         if (!FcNameUnparseValue (buf, v->value, escape))
 531             return FcFalse;
 532         if ((v = v->next))
 533             if (!FcNameUnparseString (buf, (FcChar8 *) ",", 0))
 534                 return FcFalse;
 535     }
 536     return FcTrue;
 537 }
 538
 539 #define FC_ESCAPE_FIXED    "\\-:,"
 540 #define FC_ESCAPE_VARIABLE "\\=_:,"
 541
 542 FcChar8 *
 543 FcNameUnparse (FcPattern *pat)
 544 {
 545     FcStrBuf                buf;
 546     FcChar8                 buf_static[8192];
 547     int                     i;
 548     FcPatternElt            *e;
 549     const FcObjectTypeList  *l;
 550     const FcObjectType      *o;
 551
 552     FcStrBufInit (&buf, buf_static, sizeof (buf_static));
 553     e = FcPatternFindElt (pat, FC_FAMILY);
 554     if (e)
 555     {
 556         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 557             goto bail0;
 558     }
 559     e = FcPatternFindElt (pat, FC_SIZE);
 560     if (e)
 561     {
 562         if (!FcNameUnparseString (&buf, (FcChar8 *) "-", 0))
 563             goto bail0;
 564         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 565             goto bail0;
 566     }
 567     for (l = _FcObjectTypes; l; l = l->next)
 568     {
 569         for (i = 0; i < l->ntypes; i++)
 570         {
 571             o = &l->types[i];
 572             if (!strcmp (o->object, FC_FAMILY) ||
 573                 !strcmp (o->object, FC_SIZE) ||
 574                 !strcmp (o->object, FC_FILE))
 575                 continue;
 576
 577             e = FcPatternFindElt (pat, o->object);
 578             if (e)
 579             {
 580                 if (!FcNameUnparseString (&buf, (FcChar8 *) ":", 0))
 581                     goto bail0;
 582                 if (!FcNameUnparseString (&buf, (FcChar8 *) o->object, (FcChar8 *) FC_ESCAPE_VARIABLE))
 583                     goto bail0;
 584                 if (!FcNameUnparseString (&buf, (FcChar8 *) "=", 0))
 585                     goto bail0;
 586                 if (!FcNameUnparseValueList (&buf, e->values,
 587                                              (FcChar8 *) FC_ESCAPE_VARIABLE))
 588                     goto bail0;
 589             }
 590         }
 591     }
 592     return FcStrBufDone (&buf);
 593 bail0:
 594     FcStrBufDestroy (&buf);
 595     return 0;
 596 }