src/fcname.c

   1 /*
   2  * $XFree86: xc/lib/fontconfig/src/fcname.c,v 1.9 2002/06/26 22:14:08 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,          FcTypeString },
  63 };
  64
  65 #define NUM_OBJECT_TYPES    (sizeof _FcBaseObjectTypes / sizeof _FcBaseObjectTypes[0])
  66
  67 typedef struct _FcObjectTypeList    FcObjectTypeList;
  68
  69 struct _FcObjectTypeList {
  70     const FcObjectTypeList  *next;
  71     const FcObjectType      *types;
  72     int                     ntypes;
  73 };
  74
  75 static const FcObjectTypeList _FcBaseObjectTypesList = {
  76     0,
  77     _FcBaseObjectTypes,
  78     NUM_OBJECT_TYPES
  79 };
  80
  81 static const FcObjectTypeList   *_FcObjectTypes = &_FcBaseObjectTypesList;
  82
  83 FcBool
  84 FcNameRegisterObjectTypes (const FcObjectType *types, int ntypes)
  85 {
  86     FcObjectTypeList    *l;
  87
  88     l = (FcObjectTypeList *) malloc (sizeof (FcObjectTypeList));
  89     if (!l)
  90         return FcFalse;
  91     l->types = types;
  92     l->ntypes = ntypes;
  93     l->next = _FcObjectTypes;
  94     _FcObjectTypes = l;
  95     return FcTrue;
  96 }
  97
  98 FcBool
  99 FcNameUnregisterObjectTypes (const FcObjectType *types, int ntypes)
 100 {
 101     const FcObjectTypeList      *l, **prev;
 102
 103     for (prev = &_FcObjectTypes;
 104          (l = *prev);
 105          prev = (const FcObjectTypeList **) &(l->next))
 106     {
 107         if (l->types == types && l->ntypes == ntypes)
 108         {
 109             *prev = l->next;
 110             free ((void *) l);
 111             return FcTrue;
 112         }
 113     }
 114     return FcFalse;
 115 }
 116
 117 const FcObjectType *
 118 FcNameGetObjectType (const char *object)
 119 {
 120     int                     i;
 121     const FcObjectTypeList  *l;
 122     const FcObjectType      *t;
 123
 124     for (l = _FcObjectTypes; l; l = l->next)
 125     {
 126         for (i = 0; i < l->ntypes; i++)
 127         {
 128             t = &l->types[i];
 129             if (!strcmp (object, t->object))
 130                 return t;
 131         }
 132     }
 133     return 0;
 134 }
 135
 136 static const FcConstant _FcBaseConstants[] = {
 137     { (FcChar8 *) "light",          "weight",   FC_WEIGHT_LIGHT, },
 138     { (FcChar8 *) "medium",         "weight",   FC_WEIGHT_MEDIUM, },
 139     { (FcChar8 *) "demibold",       "weight",   FC_WEIGHT_DEMIBOLD, },
 140     { (FcChar8 *) "bold",           "weight",   FC_WEIGHT_BOLD, },
 141     { (FcChar8 *) "black",          "weight",   FC_WEIGHT_BLACK, },
 142
 143     { (FcChar8 *) "roman",          "slant",    FC_SLANT_ROMAN, },
 144     { (FcChar8 *) "italic",         "slant",    FC_SLANT_ITALIC, },
 145     { (FcChar8 *) "oblique",        "slant",    FC_SLANT_OBLIQUE, },
 146
 147     { (FcChar8 *) "proportional",   "spacing",  FC_PROPORTIONAL, },
 148     { (FcChar8 *) "mono",           "spacing",  FC_MONO, },
 149     { (FcChar8 *) "charcell",       "spacing",  FC_CHARCELL, },
 150
 151     { (FcChar8 *) "none",           "rgba",         FC_RGBA_NONE },
 152     { (FcChar8 *) "rgb",            "rgba",         FC_RGBA_RGB, },
 153     { (FcChar8 *) "bgr",            "rgba",         FC_RGBA_BGR, },
 154     { (FcChar8 *) "vrgb",           "rgba",         FC_RGBA_VRGB },
 155     { (FcChar8 *) "vbgr",           "rgba",         FC_RGBA_VBGR },
 156 };
 157
 158 #define NUM_FC_CONSTANTS   (sizeof _FcBaseConstants/sizeof _FcBaseConstants[0])
 159
 160 typedef struct _FcConstantList FcConstantList;
 161
 162 struct _FcConstantList {
 163     const FcConstantList    *next;
 164     const FcConstant        *consts;
 165     int                     nconsts;
 166 };
 167
 168 static const FcConstantList _FcBaseConstantList = {
 169     0,
 170     _FcBaseConstants,
 171     NUM_FC_CONSTANTS
 172 };
 173
 174 static const FcConstantList     *_FcConstants = &_FcBaseConstantList;
 175
 176 FcBool
 177 FcNameRegisterConstants (const FcConstant *consts, int nconsts)
 178 {
 179     FcConstantList      *l;
 180
 181     l = (FcConstantList *) malloc (sizeof (FcConstantList));
 182     if (!l)
 183         return FcFalse;
 184     l->consts = consts;
 185     l->nconsts = nconsts;
 186     l->next = _FcConstants;
 187     _FcConstants = l;
 188     return FcTrue;
 189 }
 190
 191 FcBool
 192 FcNameUnregisterConstants (const FcConstant *consts, int nconsts)
 193 {
 194     const FcConstantList        *l, **prev;
 195
 196     for (prev = &_FcConstants;
 197          (l = *prev);
 198          prev = (const FcConstantList **) &(l->next))
 199     {
 200         if (l->consts == consts && l->nconsts == nconsts)
 201         {
 202             *prev = l->next;
 203             free ((void *) l);
 204             return FcTrue;
 205         }
 206     }
 207     return FcFalse;
 208 }
 209
 210 const FcConstant *
 211 FcNameGetConstant (FcChar8 *string)
 212 {
 213     const FcConstantList    *l;
 214     int                     i;
 215
 216     for (l = _FcConstants; l; l = l->next)
 217     {
 218         for (i = 0; i < l->nconsts; i++)
 219             if (!FcStrCmpIgnoreCase (string, l->consts[i].name))
 220                 return &l->consts[i];
 221     }
 222     return 0;
 223 }
 224
 225 FcBool
 226 FcNameConstant (FcChar8 *string, int *result)
 227 {
 228     const FcConstant    *c;
 229
 230     if ((c = FcNameGetConstant(string)))
 231     {
 232         *result = c->value;
 233         return FcTrue;
 234     }
 235     return FcFalse;
 236 }
 237
 238 FcBool
 239 FcNameBool (FcChar8 *v, FcBool *result)
 240 {
 241     char    c0, c1;
 242
 243     c0 = *v;
 244     if (isupper (c0))
 245         c0 = tolower (c0);
 246     if (c0 == 't' || c0 == 'y' || c0 == '1')
 247     {
 248         *result = FcTrue;
 249         return FcTrue;
 250     }
 251     if (c0 == 'f' || c0 == 'n' || c0 == '0')
 252     {
 253         *result = FcFalse;
 254         return FcTrue;
 255     }
 256     if (c0 == 'o')
 257     {
 258         c1 = v[1];
 259         if (isupper (c1))
 260             c1 = tolower (c1);
 261         if (c1 == 'n')
 262         {
 263             *result = FcTrue;
 264             return FcTrue;
 265         }
 266         if (c1 == 'f')
 267         {
 268             *result = FcFalse;
 269             return FcTrue;
 270         }
 271     }
 272     return FcFalse;
 273 }
 274
 275 static FcValue
 276 FcNameConvert (FcType type, FcChar8 *string, FcMatrix *m)
 277 {
 278     FcValue     v;
 279
 280     v.type = type;
 281     switch (v.type) {
 282     case FcTypeInteger:
 283         if (!FcNameConstant (string, &v.u.i))
 284             v.u.i = atoi ((char *) string);
 285         break;
 286     case FcTypeString:
 287         v.u.s = string;
 288         break;
 289     case FcTypeBool:
 290         if (!FcNameBool (string, &v.u.b))
 291             v.u.b = FcFalse;
 292         break;
 293     case FcTypeDouble:
 294         v.u.d = strtod ((char *) string, 0);
 295         break;
 296     case FcTypeMatrix:
 297         v.u.m = m;
 298         sscanf ((char *) string, "%lg %lg %lg %lg", &m->xx, &m->xy, &m->yx, &m->yy);
 299         break;
 300     case FcTypeCharSet:
 301         v.u.c = FcNameParseCharSet (string);
 302         break;
 303     default:
 304         break;
 305     }
 306     return v;
 307 }
 308
 309 static const FcChar8 *
 310 FcNameFindNext (const FcChar8 *cur, const char *delim, FcChar8 *save, FcChar8 *last)
 311 {
 312     FcChar8    c;
 313
 314     while ((c = *cur))
 315     {
 316         if (c == '\\')
 317         {
 318             ++cur;
 319             if (!(c = *cur))
 320                 break;
 321         }
 322         else if (strchr (delim, c))
 323             break;
 324         ++cur;
 325         *save++ = c;
 326     }
 327     *save = 0;
 328     *last = *cur;
 329     if (*cur)
 330         cur++;
 331     return cur;
 332 }
 333
 334 FcPattern *
 335 FcNameParse (const FcChar8 *name)
 336 {
 337     FcChar8             *save;
 338     FcPattern           *pat;
 339     double              d;
 340     FcChar8             *e;
 341     FcChar8             delim;
 342     FcValue             v;
 343     FcMatrix            m;
 344     const FcObjectType  *t;
 345     const FcConstant    *c;
 346
 347     save = malloc (strlen ((char *) name) + 1);
 348     if (!save)
 349         goto bail0;
 350     pat = FcPatternCreate ();
 351     if (!pat)
 352         goto bail1;
 353
 354     for (;;)
 355     {
 356         name = FcNameFindNext (name, "-,:", save, &delim);
 357         if (save[0])
 358         {
 359             if (!FcPatternAddString (pat, FC_FAMILY, save))
 360                 goto bail2;
 361         }
 362         if (delim != ',')
 363             break;
 364     }
 365     if (delim == '-')
 366     {
 367         for (;;)
 368         {
 369             name = FcNameFindNext (name, "-,:", save, &delim);
 370             d = strtod ((char *) save, (char **) &e);
 371             if (e != save)
 372             {
 373                 if (!FcPatternAddDouble (pat, FC_SIZE, d))
 374                     goto bail2;
 375             }
 376             if (delim != ',')
 377                 break;
 378         }
 379     }
 380     while (delim == ':')
 381     {
 382         name = FcNameFindNext (name, "=_:", save, &delim);
 383         if (save[0])
 384         {
 385             if (delim == '=' || delim == '_')
 386             {
 387                 t = FcNameGetObjectType ((char *) save);
 388                 for (;;)
 389                 {
 390                     name = FcNameFindNext (name, ":,", save, &delim);
 391                     if (t)
 392                     {
 393                         v = FcNameConvert (t->type, save, &m);
 394                         if (!FcPatternAdd (pat, t->object, v, FcTrue))
 395                         {
 396                             if (v.type == FcTypeCharSet)
 397                                 FcCharSetDestroy ((FcCharSet *) v.u.c);
 398                             goto bail2;
 399                         }
 400                         if (v.type == FcTypeCharSet)
 401                             FcCharSetDestroy ((FcCharSet *) v.u.c);
 402                     }
 403                     if (delim != ',')
 404                         break;
 405                 }
 406             }
 407             else
 408             {
 409                 if ((c = FcNameGetConstant (save)))
 410                 {
 411                     if (!FcPatternAddInteger (pat, c->object, c->value))
 412                         goto bail2;
 413                 }
 414             }
 415         }
 416     }
 417
 418     free (save);
 419     return pat;
 420
 421 bail2:
 422     FcPatternDestroy (pat);
 423 bail1:
 424     free (save);
 425 bail0:
 426     return 0;
 427 }
 428 static FcBool
 429 FcNameUnparseString (FcStrBuf       *buf,
 430                      const FcChar8  *string,
 431                      const FcChar8  *escape)
 432 {
 433     FcChar8 c;
 434     while ((c = *string++))
 435     {
 436         if (escape && strchr ((char *) escape, (char) c))
 437         {
 438             if (!FcStrBufChar (buf, escape[0]))
 439                 return FcFalse;
 440         }
 441         if (!FcStrBufChar (buf, c))
 442             return FcFalse;
 443     }
 444     return FcTrue;
 445 }
 446
 447 static FcBool
 448 FcNameUnparseValue (FcStrBuf    *buf,
 449                     FcValue     v,
 450                     FcChar8     *escape)
 451 {
 452     FcChar8     temp[1024];
 453
 454     switch (v.type) {
 455     case FcTypeVoid:
 456         return FcTrue;
 457     case FcTypeInteger:
 458         sprintf ((char *) temp, "%d", v.u.i);
 459         return FcNameUnparseString (buf, temp, 0);
 460     case FcTypeDouble:
 461         sprintf ((char *) temp, "%g", v.u.d);
 462         return FcNameUnparseString (buf, temp, 0);
 463     case FcTypeString:
 464         return FcNameUnparseString (buf, v.u.s, escape);
 465     case FcTypeBool:
 466         return FcNameUnparseString (buf, v.u.b ? (FcChar8 *) "True" : (FcChar8 *) "False", 0);
 467     case FcTypeMatrix:
 468         sprintf ((char *) temp, "%g %g %g %g",
 469                  v.u.m->xx, v.u.m->xy, v.u.m->yx, v.u.m->yy);
 470         return FcNameUnparseString (buf, temp, 0);
 471     case FcTypeCharSet:
 472         return FcNameUnparseCharSet (buf, v.u.c);
 473     case FcTypeFTFace:
 474         return FcTrue;
 475     }
 476     return FcFalse;
 477 }
 478
 479 static FcBool
 480 FcNameUnparseValueList (FcStrBuf        *buf,
 481                         FcValueList     *v,
 482                         FcChar8         *escape)
 483 {
 484     while (v)
 485     {
 486         if (!FcNameUnparseValue (buf, v->value, escape))
 487             return FcFalse;
 488         if ((v = v->next))
 489             if (!FcNameUnparseString (buf, (FcChar8 *) ",", 0))
 490                 return FcFalse;
 491     }
 492     return FcTrue;
 493 }
 494
 495 #define FC_ESCAPE_FIXED    "\\-:,"
 496 #define FC_ESCAPE_VARIABLE "\\=_:,"
 497
 498 FcChar8 *
 499 FcNameUnparse (FcPattern *pat)
 500 {
 501     FcStrBuf                buf;
 502     FcChar8                 buf_static[8192];
 503     int                     i;
 504     FcPatternElt            *e;
 505     const FcObjectTypeList  *l;
 506     const FcObjectType      *o;
 507
 508     FcStrBufInit (&buf, buf_static, sizeof (buf_static));
 509     e = FcPatternFindElt (pat, FC_FAMILY);
 510     if (e)
 511     {
 512         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 513             goto bail0;
 514     }
 515     e = FcPatternFindElt (pat, FC_SIZE);
 516     if (e)
 517     {
 518         if (!FcNameUnparseString (&buf, (FcChar8 *) "-", 0))
 519             goto bail0;
 520         if (!FcNameUnparseValueList (&buf, e->values, (FcChar8 *) FC_ESCAPE_FIXED))
 521             goto bail0;
 522     }
 523     for (l = _FcObjectTypes; l; l = l->next)
 524     {
 525         for (i = 0; i < l->ntypes; i++)
 526         {
 527             o = &l->types[i];
 528             if (!strcmp (o->object, FC_FAMILY) ||
 529                 !strcmp (o->object, FC_SIZE) ||
 530                 !strcmp (o->object, FC_FILE))
 531                 continue;
 532
 533             e = FcPatternFindElt (pat, o->object);
 534             if (e)
 535             {
 536                 if (!FcNameUnparseString (&buf, (FcChar8 *) ":", 0))
 537                     goto bail0;
 538                 if (!FcNameUnparseString (&buf, (FcChar8 *) o->object, (FcChar8 *) FC_ESCAPE_VARIABLE))
 539                     goto bail0;
 540                 if (!FcNameUnparseString (&buf, (FcChar8 *) "=", 0))
 541                     goto bail0;
 542                 if (!FcNameUnparseValueList (&buf, e->values,
 543                                              (FcChar8 *) FC_ESCAPE_VARIABLE))
 544                     goto bail0;
 545             }
 546         }
 547     }
 548     return FcStrBufDone (&buf);
 549 bail0:
 550     FcStrBufDestroy (&buf);
 551     return 0;
 552 }