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