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 *) "book",           "weight",   FC_WEIGHT_BOOK, },
 146     { (FcChar8 *) "regular",        "weight",   FC_WEIGHT_REGULAR, },
 147     { (FcChar8 *) "medium",         "weight",   FC_WEIGHT_MEDIUM, },
 148     { (FcChar8 *) "demibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 149     { (FcChar8 *) "semibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 150     { (FcChar8 *) "bold",           "weight",   FC_WEIGHT_BOLD, },
 151     { (FcChar8 *) "extrabold",      "weight",   FC_WEIGHT_EXTRABOLD, },
 152     { (FcChar8 *) "ultrabold",      "weight",   FC_WEIGHT_EXTRABOLD, },
 153     { (FcChar8 *) "black",          "weight",   FC_WEIGHT_BLACK, },
 154
 155     { (FcChar8 *) "roman",          "slant",    FC_SLANT_ROMAN, },
 156     { (FcChar8 *) "italic",         "slant",    FC_SLANT_ITALIC, },
 157     { (FcChar8 *) "oblique",        "slant",    FC_SLANT_OBLIQUE, },
 158
 159     { (FcChar8 *) "ultracondensed", "width",    FC_WIDTH_ULTRACONDENSED },
 160     { (FcChar8 *) "extracondensed", "width",    FC_WIDTH_EXTRACONDENSED },
 161     { (FcChar8 *) "condensed",      "width",    FC_WIDTH_CONDENSED },
 162     { (FcChar8 *) "semicondensed", "width",     FC_WIDTH_SEMICONDENSED },
 163     { (FcChar8 *) "normal",         "width",    FC_WIDTH_NORMAL },
 164     { (FcChar8 *) "semiexpanded",   "width",    FC_WIDTH_SEMIEXPANDED },
 165     { (FcChar8 *) "expanded",       "width",    FC_WIDTH_EXPANDED },
 166     { (FcChar8 *) "extraexpanded",  "width",    FC_WIDTH_EXTRAEXPANDED },
 167     { (FcChar8 *) "ultraexpanded",  "width",    FC_WIDTH_ULTRAEXPANDED },
 168
 169     { (FcChar8 *) "proportional",   "spacing",  FC_PROPORTIONAL, },
 170     { (FcChar8 *) "mono",           "spacing",  FC_MONO, },
 171     { (FcChar8 *) "charcell",       "spacing",  FC_CHARCELL, },
 172
 173     { (FcChar8 *) "unknown",        "rgba",         FC_RGBA_UNKNOWN },
 174     { (FcChar8 *) "rgb",            "rgba",         FC_RGBA_RGB, },
 175     { (FcChar8 *) "bgr",            "rgba",         FC_RGBA_BGR, },
 176     { (FcChar8 *) "vrgb",           "rgba",         FC_RGBA_VRGB },
 177     { (FcChar8 *) "vbgr",           "rgba",         FC_RGBA_VBGR },
 178     { (FcChar8 *) "none",           "rgba",         FC_RGBA_NONE },
 179 };
 180
 181 #define NUM_FC_CONSTANTS   (sizeof _FcBaseConstants/sizeof _FcBaseConstants[0])
 182
 183 typedef struct _FcConstantList FcConstantList;
 184
 185 struct _FcConstantList {
 186     const FcConstantList    *next;
 187     const FcConstant        *consts;
 188     int                     nconsts;
 189 };
 190
 191 static const FcConstantList _FcBaseConstantList = {
 192     0,
 193     _FcBaseConstants,
 194     NUM_FC_CONSTANTS
 195 };
 196
 197 static const FcConstantList     *_FcConstants = &_FcBaseConstantList;
 198
 199 FcBool
 200 FcNameRegisterConstants (const FcConstant *consts, int nconsts)
 201 {
 202     FcConstantList      *l;
 203
 204     l = (FcConstantList *) malloc (sizeof (FcConstantList));
 205     if (!l)
 206         return FcFalse;
 207     FcMemAlloc (FC_MEM_CONSTANT, sizeof (FcConstantList));
 208     l->consts = consts;
 209     l->nconsts = nconsts;
 210     l->next = _FcConstants;
 211     _FcConstants = l;
 212     return FcTrue;
 213 }
 214
 215 FcBool
 216 FcNameUnregisterConstants (const FcConstant *consts, int nconsts)
 217 {
 218     const FcConstantList        *l, **prev;
 219
 220     for (prev = &_FcConstants;
 221          (l = *prev);
 222          prev = (const FcConstantList **) &(l->next))
 223     {
 224         if (l->consts == consts && l->nconsts == nconsts)
 225         {
 226             *prev = l->next;
 227             FcMemFree (FC_MEM_CONSTANT, sizeof (FcConstantList));
 228             free ((void *) l);
 229             return FcTrue;
 230         }
 231     }
 232     return FcFalse;
 233 }
 234
 235 const FcConstant *
 236 FcNameGetConstant (FcChar8 *string)
 237 {
 238     const FcConstantList    *l;
 239     int                     i;
 240
 241     for (l = _FcConstants; l; l = l->next)
 242     {
 243         for (i = 0; i < l->nconsts; i++)
 244             if (!FcStrCmpIgnoreCase (string, l->consts[i].name))
 245                 return &l->consts[i];
 246     }
 247     return 0;
 248 }
 249
 250 FcBool
 251 FcNameConstant (FcChar8 *string, int *result)
 252 {
 253     const FcConstant    *c;
 254
 255     if ((c = FcNameGetConstant(string)))
 256     {
 257         *result = c->value;
 258         return FcTrue;
 259     }
 260     return FcFalse;
 261 }
 262
 263 FcBool
 264 FcNameBool (FcChar8 *v, FcBool *result)
 265 {
 266     char    c0, c1;
 267
 268     c0 = *v;
 269     c0 = FcToLower (c0);
 270     if (c0 == 't' || c0 == 'y' || c0 == '1')
 271     {
 272         *result = FcTrue;
 273         return FcTrue;
 274     }
 275     if (c0 == 'f' || c0 == 'n' || c0 == '0')
 276     {
 277         *result = FcFalse;
 278         return FcTrue;
 279     }
 280     if (c0 == 'o')
 281     {
 282         c1 = v[1];
 283         c1 = FcToLower (c1);
 284         if (c1 == 'n')
 285         {
 286             *result = FcTrue;
 287             return FcTrue;
 288         }
 289         if (c1 == 'f')
 290         {
 291             *result = FcFalse;
 292             return FcTrue;
 293         }
 294     }
 295     return FcFalse;
 296 }
 297
 298 static FcValue
 299 FcNameConvert (FcType type, FcChar8 *string, FcMatrix *m)
 300 {
 301     FcValue     v;
 302
 303     v.type = type;
 304     switch (v.type) {
 305     case FcTypeInteger:
 306         if (!FcNameConstant (string, &v.u.i))
 307             v.u.i = atoi ((char *) string);
 308         break;
 309     case FcTypeString:
 310         v.u.s = string;
 311         break;
 312     case FcTypeBool:
 313         if (!FcNameBool (string, &v.u.b))
 314             v.u.b = FcFalse;
 315         break;
 316     case FcTypeDouble:
 317         v.u.d = strtod ((char *) string, 0);
 318         break;
 319     case FcTypeMatrix:
 320         v.u.m = m;
 321         sscanf ((char *) string, "%lg %lg %lg %lg", &m->xx, &m->xy, &m->yx, &m->yy);
 322         break;
 323     case FcTypeCharSet:
 324         v.u.c = FcNameParseCharSet (string);
 325         break;
 326     case FcTypeLangSet:
 327         v.u.l = FcNameParseLangSet (string);
 328         break;
 329     default:
 330         break;
 331     }
 332     return v;
 333 }
 334
 335 static const FcChar8 *
 336 FcNameFindNext (const FcChar8 *cur, const char *delim, FcChar8 *save, FcChar8 *last)
 337 {
 338     FcChar8    c;
 339
 340     while ((c = *cur))
 341     {
 342         if (c == '\\')
 343         {
 344             ++cur;
 345             if (!(c = *cur))
 346                 break;
 347         }
 348         else if (strchr (delim, c))
 349             break;
 350         ++cur;
 351         *save++ = c;
 352     }
 353     *save = 0;
 354     *last = *cur;
 355     if (*cur)
 356         cur++;
 357     return cur;
 358 }
 359
 360 FcPattern *
 361 FcNameParse (const FcChar8 *name)
 362 {
 363     FcChar8             *save;
 364     FcPattern           *pat;
 365     double              d;
 366     FcChar8             *e;
 367     FcChar8             delim;
 368     FcValue             v;
 369     FcMatrix            m;
 370     const FcObjectType  *t;
 371     const FcConstant    *c;
 372
 373     /* freed below */
 374     save = malloc (strlen ((char *) name) + 1);
 375     if (!save)
 376         goto bail0;
 377     pat = FcPatternCreate ();
 378     if (!pat)
 379         goto bail1;
 380
 381     for (;;)
 382     {
 383         name = FcNameFindNext (name, "-,:", save, &delim);
 384         if (save[0])
 385         {
 386             if (!FcPatternAddString (pat, FC_FAMILY, save))
 387                 goto bail2;
 388         }
 389         if (delim != ',')
 390             break;
 391     }
 392     if (delim == '-')
 393     {
 394         for (;;)
 395         {
 396             name = FcNameFindNext (name, "-,:", save, &delim);
 397             d = strtod ((char *) save, (char **) &e);
 398             if (e != save)
 399             {
 400                 if (!FcPatternAddDouble (pat, FC_SIZE, d))
 401                     goto bail2;
 402             }
 403             if (delim != ',')
 404                 break;
 405         }
 406     }
 407     while (delim == ':')
 408     {
 409         name = FcNameFindNext (name, "=_:", save, &delim);
 410         if (save[0])
 411         {
 412             if (delim == '=' || delim == '_')
 413             {
 414                 t = FcNameGetObjectType ((char *) save);
 415                 for (;;)
 416                 {
 417                     name = FcNameFindNext (name, ":,", save, &delim);
 418                     if (t)
 419                     {
 420                         v = FcNameConvert (t->type, save, &m);
 421                         if (!FcPatternAdd (pat, t->object, v, FcTrue))
 422                         {
 423                             switch (v.type) {
 424                             case FcTypeCharSet:
 425                                 FcCharSetDestroy ((FcCharSet *) v.u.c);
 426                                 break;
 427                             case FcTypeLangSet:
 428                                 FcLangSetDestroy ((FcLangSet *) v.u.l);
 429                                 break;
 430                             default:
 431                                 break;
 432                             }
 433                             goto bail2;
 434                         }
 435                         switch (v.type) {
 436                         case FcTypeCharSet:
 437                             FcCharSetDestroy ((FcCharSet *) v.u.c);
 438                             break;
 439                         case FcTypeLangSet:
 440                             FcLangSetDestroy ((FcLangSet *) v.u.l);
 441                             break;
 442                         default:
 443                             break;
 444                         }
 445                     }
 446                     if (delim != ',')
 447                         break;
 448                 }
 449             }
 450             else
 451             {
 452                 if ((c = FcNameGetConstant (save)))
 453                 {
 454                     if (!FcPatternAddInteger (pat, c->object, c->value))
 455                         goto bail2;
 456                 }
 457             }
 458         }
 459     }
 460
 461     free (save);
 462     return pat;
 463
 464 bail2:
 465     FcPatternDestroy (pat);
 466 bail1:
 467     free (save);
 468 bail0:
 469     return 0;
 470 }
 471 static FcBool
 472 FcNameUnparseString (FcStrBuf       *buf,
 473                      const FcChar8  *string,
 474                      const FcChar8  *escape)
 475 {
 476     FcChar8 c;
 477     while ((c = *string++))
 478     {
 479         if (escape && strchr ((char *) escape, (char) c))
 480         {
 481             if (!FcStrBufChar (buf, escape[0]))
 482                 return FcFalse;
 483         }
 484         if (!FcStrBufChar (buf, c))
 485             return FcFalse;
 486     }
 487     return FcTrue;
 488 }
 489
 490 static FcBool
 491 FcNameUnparseValue (FcStrBuf    *buf,
 492                     FcValue     v,
 493                     FcChar8     *escape)
 494 {
 495     FcChar8     temp[1024];
 496
 497     switch (v.type) {
 498     case FcTypeVoid:
 499         return FcTrue;
 500     case FcTypeInteger:
 501         sprintf ((char *) temp, "%d", v.u.i);
 502         return FcNameUnparseString (buf, temp, 0);
 503     case FcTypeDouble:
 504         sprintf ((char *) temp, "%g", v.u.d);
 505         return FcNameUnparseString (buf, temp, 0);
 506     case FcTypeString:
 507         return FcNameUnparseString (buf, v.u.s, escape);
 508     case FcTypeBool:
 509         return FcNameUnparseString (buf, v.u.b ? (FcChar8 *) "True" : (FcChar8 *) "False", 0);
 510     case FcTypeMatrix:
 511         sprintf ((char *) temp, "%g %g %g %g",
 512                  v.u.m->xx, v.u.m->xy, v.u.m->yx, v.u.m->yy);
 513         return FcNameUnparseString (buf, temp, 0);
 514     case FcTypeCharSet:
 515         return FcNameUnparseCharSet (buf, v.u.c);
 516     case FcTypeLangSet:
 517         return FcNameUnparseLangSet (buf, v.u.l);
 518     case FcTypeFTFace:
 519         return FcTrue;
 520     }
 521     return FcFalse;
 522 }
 523
 524 static FcBool
 525 FcNameUnparseValueList (FcStrBuf        *buf,
 526                         FcValueList     *v,
 527                         FcChar8         *escape)
 528 {
 529     while (v)
 530     {
 531         if (!FcNameUnparseValue (buf, v->value, escape))
 532             return FcFalse;
 533         if ((v = v->next))
 534             if (!FcNameUnparseString (buf, (FcChar8 *) ",", 0))
 535                 return FcFalse;
 536     }
 537     return FcTrue;
 538 }
 539
 540 #define FC_ESCAPE_FIXED    "\\-:,"
 541 #define FC_ESCAPE_VARIABLE "\\=_:,"
 542
 543 FcChar8 *
 544 FcNameUnparse (FcPattern *pat)
 545 {
 546     FcStrBuf                buf;
 547     FcChar8                 buf_static[8192];
 548     int                     i;
 549     FcPatternElt            *e;
 550     const FcObjectTypeList  *l;
 551     const FcObjectType      *o;
 552
 553     FcStrBufInit (&buf, buf_static, sizeof (buf_static));
 554     e = FcPatternFindElt (pat, FC_FAMILY);
 555     if (e)
 556     {
 557         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 558             goto bail0;
 559     }
 560     e = FcPatternFindElt (pat, FC_SIZE);
 561     if (e)
 562     {
 563         if (!FcNameUnparseString (&buf, (FcChar8 *) "-", 0))
 564             goto bail0;
 565         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 566             goto bail0;
 567     }
 568     for (l = _FcObjectTypes; l; l = l->next)
 569     {
 570         for (i = 0; i < l->ntypes; i++)
 571         {
 572             o = &l->types[i];
 573             if (!strcmp (o->object, FC_FAMILY) ||
 574                 !strcmp (o->object, FC_SIZE) ||
 575                 !strcmp (o->object, FC_FILE))
 576                 continue;
 577
 578             e = FcPatternFindElt (pat, o->object);
 579             if (e)
 580             {
 581                 if (!FcNameUnparseString (&buf, (FcChar8 *) ":", 0))
 582                     goto bail0;
 583                 if (!FcNameUnparseString (&buf, (FcChar8 *) o->object, (FcChar8 *) FC_ESCAPE_VARIABLE))
 584                     goto bail0;
 585                 if (!FcNameUnparseString (&buf, (FcChar8 *) "=", 0))
 586                     goto bail0;
 587                 if (!FcNameUnparseValueList (&buf, e->values,
 588                                              (FcChar8 *) FC_ESCAPE_VARIABLE))
 589                     goto bail0;
 590             }
 591         }
 592     }
 593     return FcStrBufDone (&buf);
 594 bail0:
 595     FcStrBufDestroy (&buf);
 596     return 0;
 597 }