src/fcname.c

   1 /*
   2  * $XFree86: xc/lib/fontconfig/src/fcname.c,v 1.14 2002/08/31 22:17:32 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 <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_SIZE,          FcTypeDouble, },
  37     { FC_ASPECT,        FcTypeDouble, },
  38     { FC_PIXEL_SIZE,    FcTypeDouble, },
  39     { FC_SPACING,       FcTypeInteger, },
  40     { FC_FOUNDRY,       FcTypeString, },
  41 /*    { FC_CORE,                FcTypeBool, }, */
  42     { FC_ANTIALIAS,     FcTypeBool, },
  43     { FC_HINTING,       FcTypeBool, },
  44     { FC_VERTICAL_LAYOUT,   FcTypeBool, },
  45     { FC_AUTOHINT,      FcTypeBool, },
  46     { FC_GLOBAL_ADVANCE,    FcTypeBool, },
  47 /*    { FC_XLFD,                FcTypeString, }, */
  48     { FC_FILE,          FcTypeString, },
  49     { FC_INDEX,         FcTypeInteger, },
  50     { FC_RASTERIZER,    FcTypeString, },
  51     { FC_OUTLINE,       FcTypeBool, },
  52     { FC_SCALABLE,      FcTypeBool, },
  53     { FC_DPI,           FcTypeDouble },
  54     { FC_RGBA,          FcTypeInteger, },
  55     { FC_SCALE,         FcTypeDouble, },
  56 /*    { FC_RENDER,      FcTypeBool, },*/
  57     { FC_MINSPACE,      FcTypeBool, },
  58     { FC_CHAR_WIDTH,    FcTypeInteger },
  59     { FC_CHAR_HEIGHT,   FcTypeInteger },
  60     { FC_MATRIX,        FcTypeMatrix },
  61     { FC_CHARSET,       FcTypeCharSet },
  62     { FC_LANG,          FcTypeLangSet },
  63     { FC_FONTVERSION,   FcTypeInteger },
  64 };
  65
  66 #define NUM_OBJECT_TYPES    (sizeof _FcBaseObjectTypes / sizeof _FcBaseObjectTypes[0])
  67
  68 typedef struct _FcObjectTypeList    FcObjectTypeList;
  69
  70 struct _FcObjectTypeList {
  71     const FcObjectTypeList  *next;
  72     const FcObjectType      *types;
  73     int                     ntypes;
  74 };
  75
  76 static const FcObjectTypeList _FcBaseObjectTypesList = {
  77     0,
  78     _FcBaseObjectTypes,
  79     NUM_OBJECT_TYPES
  80 };
  81
  82 static const FcObjectTypeList   *_FcObjectTypes = &_FcBaseObjectTypesList;
  83
  84 FcBool
  85 FcNameRegisterObjectTypes (const FcObjectType *types, int ntypes)
  86 {
  87     FcObjectTypeList    *l;
  88
  89     l = (FcObjectTypeList *) malloc (sizeof (FcObjectTypeList));
  90     if (!l)
  91         return FcFalse;
  92     FcMemAlloc (FC_MEM_OBJECTTYPE, sizeof (FcObjectTypeList));
  93     l->types = types;
  94     l->ntypes = ntypes;
  95     l->next = _FcObjectTypes;
  96     _FcObjectTypes = l;
  97     return FcTrue;
  98 }
  99
 100 FcBool
 101 FcNameUnregisterObjectTypes (const FcObjectType *types, int ntypes)
 102 {
 103     const FcObjectTypeList      *l, **prev;
 104
 105     for (prev = &_FcObjectTypes;
 106          (l = *prev);
 107          prev = (const FcObjectTypeList **) &(l->next))
 108     {
 109         if (l->types == types && l->ntypes == ntypes)
 110         {
 111             *prev = l->next;
 112             FcMemFree (FC_MEM_OBJECTTYPE, sizeof (FcObjectTypeList));
 113             free ((void *) l);
 114             return FcTrue;
 115         }
 116     }
 117     return FcFalse;
 118 }
 119
 120 const FcObjectType *
 121 FcNameGetObjectType (const char *object)
 122 {
 123     int                     i;
 124     const FcObjectTypeList  *l;
 125     const FcObjectType      *t;
 126
 127     for (l = _FcObjectTypes; l; l = l->next)
 128     {
 129         for (i = 0; i < l->ntypes; i++)
 130         {
 131             t = &l->types[i];
 132             if (!strcmp (object, t->object))
 133                 return t;
 134         }
 135     }
 136     return 0;
 137 }
 138
 139 static const FcConstant _FcBaseConstants[] = {
 140     { (FcChar8 *) "light",          "weight",   FC_WEIGHT_LIGHT, },
 141     { (FcChar8 *) "medium",         "weight",   FC_WEIGHT_MEDIUM, },
 142     { (FcChar8 *) "demibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 143     { (FcChar8 *) "bold",           "weight",   FC_WEIGHT_BOLD, },
 144     { (FcChar8 *) "black",          "weight",   FC_WEIGHT_BLACK, },
 145
 146     { (FcChar8 *) "roman",          "slant",    FC_SLANT_ROMAN, },
 147     { (FcChar8 *) "italic",         "slant",    FC_SLANT_ITALIC, },
 148     { (FcChar8 *) "oblique",        "slant",    FC_SLANT_OBLIQUE, },
 149
 150     { (FcChar8 *) "proportional",   "spacing",  FC_PROPORTIONAL, },
 151     { (FcChar8 *) "mono",           "spacing",  FC_MONO, },
 152     { (FcChar8 *) "charcell",       "spacing",  FC_CHARCELL, },
 153
 154     { (FcChar8 *) "none",           "rgba",         FC_RGBA_NONE },
 155     { (FcChar8 *) "rgb",            "rgba",         FC_RGBA_RGB, },
 156     { (FcChar8 *) "bgr",            "rgba",         FC_RGBA_BGR, },
 157     { (FcChar8 *) "vrgb",           "rgba",         FC_RGBA_VRGB },
 158     { (FcChar8 *) "vbgr",           "rgba",         FC_RGBA_VBGR },
 159 };
 160
 161 #define NUM_FC_CONSTANTS   (sizeof _FcBaseConstants/sizeof _FcBaseConstants[0])
 162
 163 typedef struct _FcConstantList FcConstantList;
 164
 165 struct _FcConstantList {
 166     const FcConstantList    *next;
 167     const FcConstant        *consts;
 168     int                     nconsts;
 169 };
 170
 171 static const FcConstantList _FcBaseConstantList = {
 172     0,
 173     _FcBaseConstants,
 174     NUM_FC_CONSTANTS
 175 };
 176
 177 static const FcConstantList     *_FcConstants = &_FcBaseConstantList;
 178
 179 FcBool
 180 FcNameRegisterConstants (const FcConstant *consts, int nconsts)
 181 {
 182     FcConstantList      *l;
 183
 184     l = (FcConstantList *) malloc (sizeof (FcConstantList));
 185     if (!l)
 186         return FcFalse;
 187     FcMemAlloc (FC_MEM_CONSTANT, sizeof (FcConstantList));
 188     l->consts = consts;
 189     l->nconsts = nconsts;
 190     l->next = _FcConstants;
 191     _FcConstants = l;
 192     return FcTrue;
 193 }
 194
 195 FcBool
 196 FcNameUnregisterConstants (const FcConstant *consts, int nconsts)
 197 {
 198     const FcConstantList        *l, **prev;
 199
 200     for (prev = &_FcConstants;
 201          (l = *prev);
 202          prev = (const FcConstantList **) &(l->next))
 203     {
 204         if (l->consts == consts && l->nconsts == nconsts)
 205         {
 206             *prev = l->next;
 207             FcMemFree (FC_MEM_CONSTANT, sizeof (FcConstantList));
 208             free ((void *) l);
 209             return FcTrue;
 210         }
 211     }
 212     return FcFalse;
 213 }
 214
 215 const FcConstant *
 216 FcNameGetConstant (FcChar8 *string)
 217 {
 218     const FcConstantList    *l;
 219     int                     i;
 220
 221     for (l = _FcConstants; l; l = l->next)
 222     {
 223         for (i = 0; i < l->nconsts; i++)
 224             if (!FcStrCmpIgnoreCase (string, l->consts[i].name))
 225                 return &l->consts[i];
 226     }
 227     return 0;
 228 }
 229
 230 FcBool
 231 FcNameConstant (FcChar8 *string, int *result)
 232 {
 233     const FcConstant    *c;
 234
 235     if ((c = FcNameGetConstant(string)))
 236     {
 237         *result = c->value;
 238         return FcTrue;
 239     }
 240     return FcFalse;
 241 }
 242
 243 FcBool
 244 FcNameBool (FcChar8 *v, FcBool *result)
 245 {
 246     char    c0, c1;
 247
 248     c0 = *v;
 249     if (isupper (c0))
 250         c0 = tolower (c0);
 251     if (c0 == 't' || c0 == 'y' || c0 == '1')
 252     {
 253         *result = FcTrue;
 254         return FcTrue;
 255     }
 256     if (c0 == 'f' || c0 == 'n' || c0 == '0')
 257     {
 258         *result = FcFalse;
 259         return FcTrue;
 260     }
 261     if (c0 == 'o')
 262     {
 263         c1 = v[1];
 264         if (isupper (c1))
 265             c1 = tolower (c1);
 266         if (c1 == 'n')
 267         {
 268             *result = FcTrue;
 269             return FcTrue;
 270         }
 271         if (c1 == 'f')
 272         {
 273             *result = FcFalse;
 274             return FcTrue;
 275         }
 276     }
 277     return FcFalse;
 278 }
 279
 280 static FcValue
 281 FcNameConvert (FcType type, FcChar8 *string, FcMatrix *m)
 282 {
 283     FcValue     v;
 284
 285     v.type = type;
 286     switch (v.type) {
 287     case FcTypeInteger:
 288         if (!FcNameConstant (string, &v.u.i))
 289             v.u.i = atoi ((char *) string);
 290         break;
 291     case FcTypeString:
 292         v.u.s = string;
 293         break;
 294     case FcTypeBool:
 295         if (!FcNameBool (string, &v.u.b))
 296             v.u.b = FcFalse;
 297         break;
 298     case FcTypeDouble:
 299         v.u.d = strtod ((char *) string, 0);
 300         break;
 301     case FcTypeMatrix:
 302         v.u.m = m;
 303         sscanf ((char *) string, "%lg %lg %lg %lg", &m->xx, &m->xy, &m->yx, &m->yy);
 304         break;
 305     case FcTypeCharSet:
 306         v.u.c = FcNameParseCharSet (string);
 307         break;
 308     case FcTypeLangSet:
 309         v.u.l = FcNameParseLangSet (string);
 310         break;
 311     default:
 312         break;
 313     }
 314     return v;
 315 }
 316
 317 static const FcChar8 *
 318 FcNameFindNext (const FcChar8 *cur, const char *delim, FcChar8 *save, FcChar8 *last)
 319 {
 320     FcChar8    c;
 321
 322     while ((c = *cur))
 323     {
 324         if (c == '\\')
 325         {
 326             ++cur;
 327             if (!(c = *cur))
 328                 break;
 329         }
 330         else if (strchr (delim, c))
 331             break;
 332         ++cur;
 333         *save++ = c;
 334     }
 335     *save = 0;
 336     *last = *cur;
 337     if (*cur)
 338         cur++;
 339     return cur;
 340 }
 341
 342 FcPattern *
 343 FcNameParse (const FcChar8 *name)
 344 {
 345     FcChar8             *save;
 346     FcPattern           *pat;
 347     double              d;
 348     FcChar8             *e;
 349     FcChar8             delim;
 350     FcValue             v;
 351     FcMatrix            m;
 352     const FcObjectType  *t;
 353     const FcConstant    *c;
 354
 355     /* freed below */
 356     save = malloc (strlen ((char *) name) + 1);
 357     if (!save)
 358         goto bail0;
 359     pat = FcPatternCreate ();
 360     if (!pat)
 361         goto bail1;
 362
 363     for (;;)
 364     {
 365         name = FcNameFindNext (name, "-,:", save, &delim);
 366         if (save[0])
 367         {
 368             if (!FcPatternAddString (pat, FC_FAMILY, save))
 369                 goto bail2;
 370         }
 371         if (delim != ',')
 372             break;
 373     }
 374     if (delim == '-')
 375     {
 376         for (;;)
 377         {
 378             name = FcNameFindNext (name, "-,:", save, &delim);
 379             d = strtod ((char *) save, (char **) &e);
 380             if (e != save)
 381             {
 382                 if (!FcPatternAddDouble (pat, FC_SIZE, d))
 383                     goto bail2;
 384             }
 385             if (delim != ',')
 386                 break;
 387         }
 388     }
 389     while (delim == ':')
 390     {
 391         name = FcNameFindNext (name, "=_:", save, &delim);
 392         if (save[0])
 393         {
 394             if (delim == '=' || delim == '_')
 395             {
 396                 t = FcNameGetObjectType ((char *) save);
 397                 for (;;)
 398                 {
 399                     name = FcNameFindNext (name, ":,", save, &delim);
 400                     if (t)
 401                     {
 402                         v = FcNameConvert (t->type, save, &m);
 403                         if (!FcPatternAdd (pat, t->object, v, FcTrue))
 404                         {
 405                             switch (v.type) {
 406                             case FcTypeCharSet:
 407                                 FcCharSetDestroy ((FcCharSet *) v.u.c);
 408                                 break;
 409                             case FcTypeLangSet:
 410                                 FcLangSetDestroy ((FcLangSet *) v.u.l);
 411                                 break;
 412                             default:
 413                                 break;
 414                             }
 415                             goto bail2;
 416                         }
 417                         switch (v.type) {
 418                         case FcTypeCharSet:
 419                             FcCharSetDestroy ((FcCharSet *) v.u.c);
 420                             break;
 421                         case FcTypeLangSet:
 422                             FcLangSetDestroy ((FcLangSet *) v.u.l);
 423                             break;
 424                         default:
 425                             break;
 426                         }
 427                     }
 428                     if (delim != ',')
 429                         break;
 430                 }
 431             }
 432             else
 433             {
 434                 if ((c = FcNameGetConstant (save)))
 435                 {
 436                     if (!FcPatternAddInteger (pat, c->object, c->value))
 437                         goto bail2;
 438                 }
 439             }
 440         }
 441     }
 442
 443     free (save);
 444     return pat;
 445
 446 bail2:
 447     FcPatternDestroy (pat);
 448 bail1:
 449     free (save);
 450 bail0:
 451     return 0;
 452 }
 453 static FcBool
 454 FcNameUnparseString (FcStrBuf       *buf,
 455                      const FcChar8  *string,
 456                      const FcChar8  *escape)
 457 {
 458     FcChar8 c;
 459     while ((c = *string++))
 460     {
 461         if (escape && strchr ((char *) escape, (char) c))
 462         {
 463             if (!FcStrBufChar (buf, escape[0]))
 464                 return FcFalse;
 465         }
 466         if (!FcStrBufChar (buf, c))
 467             return FcFalse;
 468     }
 469     return FcTrue;
 470 }
 471
 472 static FcBool
 473 FcNameUnparseValue (FcStrBuf    *buf,
 474                     FcValue     v,
 475                     FcChar8     *escape)
 476 {
 477     FcChar8     temp[1024];
 478
 479     switch (v.type) {
 480     case FcTypeVoid:
 481         return FcTrue;
 482     case FcTypeInteger:
 483         sprintf ((char *) temp, "%d", v.u.i);
 484         return FcNameUnparseString (buf, temp, 0);
 485     case FcTypeDouble:
 486         sprintf ((char *) temp, "%g", v.u.d);
 487         return FcNameUnparseString (buf, temp, 0);
 488     case FcTypeString:
 489         return FcNameUnparseString (buf, v.u.s, escape);
 490     case FcTypeBool:
 491         return FcNameUnparseString (buf, v.u.b ? (FcChar8 *) "True" : (FcChar8 *) "False", 0);
 492     case FcTypeMatrix:
 493         sprintf ((char *) temp, "%g %g %g %g",
 494                  v.u.m->xx, v.u.m->xy, v.u.m->yx, v.u.m->yy);
 495         return FcNameUnparseString (buf, temp, 0);
 496     case FcTypeCharSet:
 497         return FcNameUnparseCharSet (buf, v.u.c);
 498     case FcTypeLangSet:
 499         return FcNameUnparseLangSet (buf, v.u.l);
 500     case FcTypeFTFace:
 501         return FcTrue;
 502     }
 503     return FcFalse;
 504 }
 505
 506 static FcBool
 507 FcNameUnparseValueList (FcStrBuf        *buf,
 508                         FcValueList     *v,
 509                         FcChar8         *escape)
 510 {
 511     while (v)
 512     {
 513         if (!FcNameUnparseValue (buf, v->value, escape))
 514             return FcFalse;
 515         if ((v = v->next))
 516             if (!FcNameUnparseString (buf, (FcChar8 *) ",", 0))
 517                 return FcFalse;
 518     }
 519     return FcTrue;
 520 }
 521
 522 #define FC_ESCAPE_FIXED    "\\-:,"
 523 #define FC_ESCAPE_VARIABLE "\\=_:,"
 524
 525 FcChar8 *
 526 FcNameUnparse (FcPattern *pat)
 527 {
 528     FcStrBuf                buf;
 529     FcChar8                 buf_static[8192];
 530     int                     i;
 531     FcPatternElt            *e;
 532     const FcObjectTypeList  *l;
 533     const FcObjectType      *o;
 534
 535     FcStrBufInit (&buf, buf_static, sizeof (buf_static));
 536     e = FcPatternFindElt (pat, FC_FAMILY);
 537     if (e)
 538     {
 539         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 540             goto bail0;
 541     }
 542     e = FcPatternFindElt (pat, FC_SIZE);
 543     if (e)
 544     {
 545         if (!FcNameUnparseString (&buf, (FcChar8 *) "-", 0))
 546             goto bail0;
 547         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 548             goto bail0;
 549     }
 550     for (l = _FcObjectTypes; l; l = l->next)
 551     {
 552         for (i = 0; i < l->ntypes; i++)
 553         {
 554             o = &l->types[i];
 555             if (!strcmp (o->object, FC_FAMILY) ||
 556                 !strcmp (o->object, FC_SIZE) ||
 557                 !strcmp (o->object, FC_FILE))
 558                 continue;
 559
 560             e = FcPatternFindElt (pat, o->object);
 561             if (e)
 562             {
 563                 if (!FcNameUnparseString (&buf, (FcChar8 *) ":", 0))
 564                     goto bail0;
 565                 if (!FcNameUnparseString (&buf, (FcChar8 *) o->object, (FcChar8 *) FC_ESCAPE_VARIABLE))
 566                     goto bail0;
 567                 if (!FcNameUnparseString (&buf, (FcChar8 *) "=", 0))
 568                     goto bail0;
 569                 if (!FcNameUnparseValueList (&buf, e->values,
 570                                              (FcChar8 *) FC_ESCAPE_VARIABLE))
 571                     goto bail0;
 572             }
 573         }
 574     }
 575     return FcStrBufDone (&buf);
 576 bail0:
 577     FcStrBufDestroy (&buf);
 578     return 0;
 579 }