src/fcname.c

   1 /*
   2  * $XFree86: xc/lib/fontconfig/src/fcname.c,v 1.6 2002/06/02 21:07:57 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_XLFD,                FcTypeString, }, */
  44     { FC_FILE,          FcTypeString, },
  45     { FC_INDEX,         FcTypeInteger, },
  46     { FC_RASTERIZER,    FcTypeString, },
  47     { FC_OUTLINE,       FcTypeBool, },
  48     { FC_SCALABLE,      FcTypeBool, },
  49     { FC_RGBA,          FcTypeInteger, },
  50     { FC_SCALE,         FcTypeDouble, },
  51 /*    { FC_RENDER,      FcTypeBool, },*/
  52     { FC_MINSPACE,      FcTypeBool, },
  53     { FC_CHAR_WIDTH,    FcTypeInteger },
  54     { FC_CHAR_HEIGHT,   FcTypeInteger },
  55     { FC_MATRIX,        FcTypeMatrix },
  56     { FC_CHARSET,       FcTypeCharSet },
  57     { FC_LANG,          FcTypeString },
  58 };
  59
  60 #define NUM_OBJECT_TYPES    (sizeof _FcBaseObjectTypes / sizeof _FcBaseObjectTypes[0])
  61
  62 typedef struct _FcObjectTypeList    FcObjectTypeList;
  63
  64 struct _FcObjectTypeList {
  65     const FcObjectTypeList  *next;
  66     const FcObjectType      *types;
  67     int                     ntypes;
  68 };
  69
  70 static const FcObjectTypeList _FcBaseObjectTypesList = {
  71     0,
  72     _FcBaseObjectTypes,
  73     NUM_OBJECT_TYPES
  74 };
  75
  76 static const FcObjectTypeList   *_FcObjectTypes = &_FcBaseObjectTypesList;
  77
  78 FcBool
  79 FcNameRegisterObjectTypes (const FcObjectType *types, int ntypes)
  80 {
  81     FcObjectTypeList    *l;
  82
  83     l = (FcObjectTypeList *) malloc (sizeof (FcObjectTypeList));
  84     if (!l)
  85         return FcFalse;
  86     l->types = types;
  87     l->ntypes = ntypes;
  88     l->next = _FcObjectTypes;
  89     _FcObjectTypes = l;
  90     return FcTrue;
  91 }
  92
  93 FcBool
  94 FcNameUnregisterObjectTypes (const FcObjectType *types, int ntypes)
  95 {
  96     const FcObjectTypeList      *l, **prev;
  97
  98     for (prev = &_FcObjectTypes;
  99          (l = *prev);
 100          prev = (const FcObjectTypeList **) &(l->next))
 101     {
 102         if (l->types == types && l->ntypes == ntypes)
 103         {
 104             *prev = l->next;
 105             free ((void *) l);
 106             return FcTrue;
 107         }
 108     }
 109     return FcFalse;
 110 }
 111
 112 const FcObjectType *
 113 FcNameGetObjectType (const char *object)
 114 {
 115     int                     i;
 116     const FcObjectTypeList  *l;
 117     const FcObjectType      *t;
 118
 119     for (l = _FcObjectTypes; l; l = l->next)
 120     {
 121         for (i = 0; i < l->ntypes; i++)
 122         {
 123             t = &l->types[i];
 124             if (!strcmp (object, t->object))
 125                 return t;
 126         }
 127     }
 128     return 0;
 129 }
 130
 131 static const FcConstant _FcBaseConstants[] = {
 132     { (FcChar8 *) "light",          "weight",   FC_WEIGHT_LIGHT, },
 133     { (FcChar8 *) "medium",         "weight",   FC_WEIGHT_MEDIUM, },
 134     { (FcChar8 *) "demibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 135     { (FcChar8 *) "bold",           "weight",   FC_WEIGHT_BOLD, },
 136     { (FcChar8 *) "black",          "weight",   FC_WEIGHT_BLACK, },
 137
 138     { (FcChar8 *) "roman",          "slant",    FC_SLANT_ROMAN, },
 139     { (FcChar8 *) "italic",         "slant",    FC_SLANT_ITALIC, },
 140     { (FcChar8 *) "oblique",        "slant",    FC_SLANT_OBLIQUE, },
 141
 142     { (FcChar8 *) "proportional",   "spacing",  FC_PROPORTIONAL, },
 143     { (FcChar8 *) "mono",           "spacing",  FC_MONO, },
 144     { (FcChar8 *) "charcell",       "spacing",  FC_CHARCELL, },
 145
 146     { (FcChar8 *) "rgb",            "rgba",         FC_RGBA_RGB, },
 147     { (FcChar8 *) "bgr",            "rgba",         FC_RGBA_BGR, },
 148     { (FcChar8 *) "vrgb",           "rgba",         FC_RGBA_VRGB },
 149     { (FcChar8 *) "vbgr",           "rgba",         FC_RGBA_VBGR },
 150 };
 151
 152 #define NUM_FC_CONSTANTS   (sizeof _FcBaseConstants/sizeof _FcBaseConstants[0])
 153
 154 typedef struct _FcConstantList FcConstantList;
 155
 156 struct _FcConstantList {
 157     const FcConstantList    *next;
 158     const FcConstant        *consts;
 159     int                     nconsts;
 160 };
 161
 162 static const FcConstantList _FcBaseConstantList = {
 163     0,
 164     _FcBaseConstants,
 165     NUM_FC_CONSTANTS
 166 };
 167
 168 static const FcConstantList     *_FcConstants = &_FcBaseConstantList;
 169
 170 FcBool
 171 FcNameRegisterConstants (const FcConstant *consts, int nconsts)
 172 {
 173     FcConstantList      *l;
 174
 175     l = (FcConstantList *) malloc (sizeof (FcConstantList));
 176     if (!l)
 177         return FcFalse;
 178     l->consts = consts;
 179     l->nconsts = nconsts;
 180     l->next = _FcConstants;
 181     _FcConstants = l;
 182     return FcTrue;
 183 }
 184
 185 FcBool
 186 FcNameUnregisterConstants (const FcConstant *consts, int nconsts)
 187 {
 188     const FcConstantList        *l, **prev;
 189
 190     for (prev = &_FcConstants;
 191          (l = *prev);
 192          prev = (const FcConstantList **) &(l->next))
 193     {
 194         if (l->consts == consts && l->nconsts == nconsts)
 195         {
 196             *prev = l->next;
 197             free ((void *) l);
 198             return FcTrue;
 199         }
 200     }
 201     return FcFalse;
 202 }
 203
 204 const FcConstant *
 205 FcNameGetConstant (FcChar8 *string)
 206 {
 207     const FcConstantList    *l;
 208     int                     i;
 209
 210     for (l = _FcConstants; l; l = l->next)
 211     {
 212         for (i = 0; i < l->nconsts; i++)
 213             if (!FcStrCmpIgnoreCase (string, l->consts[i].name))
 214                 return &l->consts[i];
 215     }
 216     return 0;
 217 }
 218
 219 FcBool
 220 FcNameConstant (FcChar8 *string, int *result)
 221 {
 222     const FcConstant    *c;
 223
 224     if ((c = FcNameGetConstant(string)))
 225     {
 226         *result = c->value;
 227         return FcTrue;
 228     }
 229     return FcFalse;
 230 }
 231
 232 FcBool
 233 FcNameBool (FcChar8 *v, FcBool *result)
 234 {
 235     char    c0, c1;
 236
 237     c0 = *v;
 238     if (isupper (c0))
 239         c0 = tolower (c0);
 240     if (c0 == 't' || c0 == 'y' || c0 == '1')
 241     {
 242         *result = FcTrue;
 243         return FcTrue;
 244     }
 245     if (c0 == 'f' || c0 == 'n' || c0 == '0')
 246     {
 247         *result = FcFalse;
 248         return FcTrue;
 249     }
 250     if (c0 == 'o')
 251     {
 252         c1 = v[1];
 253         if (isupper (c1))
 254             c1 = tolower (c1);
 255         if (c1 == 'n')
 256         {
 257             *result = FcTrue;
 258             return FcTrue;
 259         }
 260         if (c1 == 'f')
 261         {
 262             *result = FcFalse;
 263             return FcTrue;
 264         }
 265     }
 266     return FcFalse;
 267 }
 268
 269 static FcValue
 270 FcNameConvert (FcType type, FcChar8 *string, FcMatrix *m)
 271 {
 272     FcValue     v;
 273
 274     v.type = type;
 275     switch (v.type) {
 276     case FcTypeInteger:
 277         if (!FcNameConstant (string, &v.u.i))
 278             v.u.i = atoi ((char *) string);
 279         break;
 280     case FcTypeString:
 281         v.u.s = string;
 282         break;
 283     case FcTypeBool:
 284         if (!FcNameBool (string, &v.u.b))
 285             v.u.b = FcFalse;
 286         break;
 287     case FcTypeDouble:
 288         v.u.d = strtod ((char *) string, 0);
 289         break;
 290     case FcTypeMatrix:
 291         v.u.m = m;
 292         sscanf ((char *) string, "%lg %lg %lg %lg", &m->xx, &m->xy, &m->yx, &m->yy);
 293         break;
 294     case FcTypeCharSet:
 295         v.u.c = FcNameParseCharSet (string);
 296         break;
 297     default:
 298         break;
 299     }
 300     return v;
 301 }
 302
 303 static const FcChar8 *
 304 FcNameFindNext (const FcChar8 *cur, const char *delim, FcChar8 *save, FcChar8 *last)
 305 {
 306     FcChar8    c;
 307
 308     while ((c = *cur))
 309     {
 310         if (c == '\\')
 311         {
 312             ++cur;
 313             if (!(c = *cur))
 314                 break;
 315         }
 316         else if (strchr (delim, c))
 317             break;
 318         ++cur;
 319         *save++ = c;
 320     }
 321     *save = 0;
 322     *last = *cur;
 323     if (*cur)
 324         cur++;
 325     return cur;
 326 }
 327
 328 FcPattern *
 329 FcNameParse (const FcChar8 *name)
 330 {
 331     FcChar8             *save;
 332     FcPattern           *pat;
 333     double              d;
 334     FcChar8             *e;
 335     FcChar8             delim;
 336     FcValue             v;
 337     FcMatrix            m;
 338     const FcObjectType  *t;
 339     const FcConstant    *c;
 340
 341     save = malloc (strlen ((char *) name) + 1);
 342     if (!save)
 343         goto bail0;
 344     pat = FcPatternCreate ();
 345     if (!pat)
 346         goto bail1;
 347
 348     for (;;)
 349     {
 350         name = FcNameFindNext (name, "-,:", save, &delim);
 351         if (save[0])
 352         {
 353             if (!FcPatternAddString (pat, FC_FAMILY, save))
 354                 goto bail2;
 355         }
 356         if (delim != ',')
 357             break;
 358     }
 359     if (delim == '-')
 360     {
 361         for (;;)
 362         {
 363             name = FcNameFindNext (name, "-,:", save, &delim);
 364             d = strtod ((char *) save, (char **) &e);
 365             if (e != save)
 366             {
 367                 if (!FcPatternAddDouble (pat, FC_SIZE, d))
 368                     goto bail2;
 369             }
 370             if (delim != ',')
 371                 break;
 372         }
 373     }
 374     while (delim == ':')
 375     {
 376         name = FcNameFindNext (name, "=_:", save, &delim);
 377         if (save[0])
 378         {
 379             if (delim == '=' || delim == '_')
 380             {
 381                 t = FcNameGetObjectType ((char *) save);
 382                 for (;;)
 383                 {
 384                     name = FcNameFindNext (name, ":,", save, &delim);
 385                     if (save[0] && t)
 386                     {
 387                         v = FcNameConvert (t->type, save, &m);
 388                         if (!FcPatternAdd (pat, t->object, v, FcTrue))
 389                         {
 390                             if (v.type == FcTypeCharSet)
 391                                 FcCharSetDestroy ((FcCharSet *) v.u.c);
 392                             goto bail2;
 393                         }
 394                         if (v.type == FcTypeCharSet)
 395                             FcCharSetDestroy ((FcCharSet *) v.u.c);
 396                     }
 397                     if (delim != ',')
 398                         break;
 399                 }
 400             }
 401             else
 402             {
 403                 if ((c = FcNameGetConstant (save)))
 404                 {
 405                     if (!FcPatternAddInteger (pat, c->object, c->value))
 406                         goto bail2;
 407                 }
 408             }
 409         }
 410     }
 411
 412     free (save);
 413     return pat;
 414
 415 bail2:
 416     FcPatternDestroy (pat);
 417 bail1:
 418     free (save);
 419 bail0:
 420     return 0;
 421 }
 422 static FcBool
 423 FcNameUnparseString (FcStrBuf       *buf,
 424                      const FcChar8  *string,
 425                      const FcChar8  *escape)
 426 {
 427     FcChar8 c;
 428     while ((c = *string++))
 429     {
 430         if (escape && strchr ((char *) escape, (char) c))
 431         {
 432             if (!FcStrBufChar (buf, escape[0]))
 433                 return FcFalse;
 434         }
 435         if (!FcStrBufChar (buf, c))
 436             return FcFalse;
 437     }
 438     return FcTrue;
 439 }
 440
 441 static FcBool
 442 FcNameUnparseValue (FcStrBuf    *buf,
 443                     FcValue     v,
 444                     FcChar8     *escape)
 445 {
 446     FcChar8     temp[1024];
 447
 448     switch (v.type) {
 449     case FcTypeVoid:
 450         return FcTrue;
 451     case FcTypeInteger:
 452         sprintf ((char *) temp, "%d", v.u.i);
 453         return FcNameUnparseString (buf, temp, 0);
 454     case FcTypeDouble:
 455         sprintf ((char *) temp, "%g", v.u.d);
 456         return FcNameUnparseString (buf, temp, 0);
 457     case FcTypeString:
 458         return FcNameUnparseString (buf, v.u.s, escape);
 459     case FcTypeBool:
 460         return FcNameUnparseString (buf, v.u.b ? (FcChar8 *) "True" : (FcChar8 *) "False", 0);
 461     case FcTypeMatrix:
 462         sprintf ((char *) temp, "%g %g %g %g",
 463                  v.u.m->xx, v.u.m->xy, v.u.m->yx, v.u.m->yy);
 464         return FcNameUnparseString (buf, temp, 0);
 465     case FcTypeCharSet:
 466         return FcNameUnparseCharSet (buf, v.u.c);
 467     case FcTypeFTFace:
 468         return FcTrue;
 469     }
 470     return FcFalse;
 471 }
 472
 473 static FcBool
 474 FcNameUnparseValueList (FcStrBuf        *buf,
 475                         FcValueList     *v,
 476                         FcChar8         *escape)
 477 {
 478     while (v)
 479     {
 480         if (!FcNameUnparseValue (buf, v->value, escape))
 481             return FcFalse;
 482         if ((v = v->next))
 483             if (!FcNameUnparseString (buf, (FcChar8 *) ",", 0))
 484                 return FcFalse;
 485     }
 486     return FcTrue;
 487 }
 488
 489 #define FC_ESCAPE_FIXED    "\\-:,"
 490 #define FC_ESCAPE_VARIABLE "\\=_:,"
 491
 492 FcChar8 *
 493 FcNameUnparse (FcPattern *pat)
 494 {
 495     FcStrBuf                buf;
 496     FcChar8                 buf_static[8192];
 497     int                     i;
 498     FcPatternElt            *e;
 499     const FcObjectTypeList  *l;
 500     const FcObjectType      *o;
 501
 502     FcStrBufInit (&buf, buf_static, sizeof (buf_static));
 503     e = FcPatternFindElt (pat, FC_FAMILY);
 504     if (e)
 505     {
 506         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 507             goto bail0;
 508     }
 509     e = FcPatternFindElt (pat, FC_SIZE);
 510     if (e)
 511     {
 512         if (!FcNameUnparseString (&buf, (FcChar8 *) "-", 0))
 513             goto bail0;
 514         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 515             goto bail0;
 516     }
 517     for (l = _FcObjectTypes; l; l = l->next)
 518     {
 519         for (i = 0; i < l->ntypes; i++)
 520         {
 521             o = &l->types[i];
 522             if (!strcmp (o->object, FC_FAMILY) ||
 523                 !strcmp (o->object, FC_SIZE) ||
 524                 !strcmp (o->object, FC_FILE))
 525                 continue;
 526
 527             e = FcPatternFindElt (pat, o->object);
 528             if (e)
 529             {
 530                 if (!FcNameUnparseString (&buf, (FcChar8 *) ":", 0))
 531                     goto bail0;
 532                 if (!FcNameUnparseString (&buf, (FcChar8 *) o->object, (FcChar8 *) FC_ESCAPE_VARIABLE))
 533                     goto bail0;
 534                 if (!FcNameUnparseString (&buf, (FcChar8 *) "=", 0))
 535                     goto bail0;
 536                 if (!FcNameUnparseValueList (&buf, e->values,
 537                                              (FcChar8 *) FC_ESCAPE_VARIABLE))
 538                     goto bail0;
 539             }
 540         }
 541     }
 542     return FcStrBufDone (&buf);
 543 bail0:
 544     FcStrBufDestroy (&buf);
 545     return 0;
 546 }