font.c 145 KB
Newer Older
Kenichi Handa's avatar
Kenichi Handa committed
1
/* font.c -- "Font" primitives.
Glenn Morris's avatar
Glenn Morris committed
2 3
   Copyright (C) 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
   Copyright (C) 2006, 2007, 2008, 2009
Kenichi Handa's avatar
Kenichi Handa committed
4 5 6 7 8
     National Institute of Advanced Industrial Science and Technology (AIST)
     Registration Number H13PRO009

This file is part of GNU Emacs.

9
GNU Emacs is free software: you can redistribute it and/or modify
Kenichi Handa's avatar
Kenichi Handa committed
10
it under the terms of the GNU General Public License as published by
11 12
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Kenichi Handa's avatar
Kenichi Handa committed
13 14 15 16 17 18 19

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
20
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
Kenichi Handa's avatar
Kenichi Handa committed
21 22 23 24 25

#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
26
#include <setjmp.h>
Kenichi Handa's avatar
Kenichi Handa committed
27 28 29 30

#include "lisp.h"
#include "buffer.h"
#include "frame.h"
Kenichi Handa's avatar
Kenichi Handa committed
31
#include "window.h"
Kenichi Handa's avatar
Kenichi Handa committed
32 33 34 35 36 37 38
#include "dispextern.h"
#include "charset.h"
#include "character.h"
#include "composite.h"
#include "fontset.h"
#include "font.h"

Kenichi Handa's avatar
Kenichi Handa committed
39 40 41 42 43 44 45 46
#ifdef HAVE_X_WINDOWS
#include "xterm.h"
#endif /* HAVE_X_WINDOWS */

#ifdef HAVE_NTGUI
#include "w32term.h"
#endif /* HAVE_NTGUI */

47 48 49 50
#ifdef HAVE_NS
#include "nsterm.h"
#endif /* HAVE_NS */

51 52 53
#ifdef HAVE_NS
extern Lisp_Object Qfontsize;
#endif
Kenichi Handa's avatar
Kenichi Handa committed
54

Kenichi Handa's avatar
Kenichi Handa committed
55 56
Lisp_Object Qopentype;

Kenichi Handa's avatar
Kenichi Handa committed
57
/* Important character set strings.  */
Kenichi Handa's avatar
Kenichi Handa committed
58
Lisp_Object Qascii_0, Qiso8859_1, Qiso10646_1, Qunicode_bmp, Qunicode_sip;
59

60 61
#define DEFAULT_ENCODING Qiso8859_1

Kenichi Handa's avatar
Kenichi Handa committed
62 63 64
/* Unicode category `Cf'.  */
static Lisp_Object QCf;

Kenichi Handa's avatar
Kenichi Handa committed
65 66
/* Special vector of zero length.  This is repeatedly used by (struct
   font_driver *)->list when a specified font is not found. */
Kenichi Handa's avatar
Kenichi Handa committed
67
static Lisp_Object null_vector;
Kenichi Handa's avatar
Kenichi Handa committed
68

69 70 71
static Lisp_Object Vfont_weight_table, Vfont_slant_table, Vfont_width_table;

/* Vector of Vfont_weight_table, Vfont_slant_table, and Vfont_width_table. */
Kenichi Handa's avatar
Kenichi Handa committed
72 73
static Lisp_Object font_style_table;

74 75 76 77 78 79 80 81
/* Structure used for tables mapping weight, slant, and width numeric
   values and their names.  */

struct table_entry
{
  int numeric;
  /* The first one is a valid name as a face attribute.
     The second one (if any) is a typical name in XLFD field.  */
82
  const char *names[5];
83 84 85 86 87
};

/* Table of weight numeric values and their names.  This table must be
   sorted by numeric values in ascending order.  */

88
static const struct table_entry weight_table[] =
89 90 91 92 93 94
{
  { 0, { "thin" }},
  { 20, { "ultra-light", "ultralight" }},
  { 40, { "extra-light", "extralight" }},
  { 50, { "light" }},
  { 75, { "semi-light", "semilight", "demilight", "book" }},
95
  { 100, { "normal", "medium", "regular", "unspecified" }},
96 97 98 99 100 101 102 103 104
  { 180, { "semi-bold", "semibold", "demibold", "demi" }},
  { 200, { "bold" }},
  { 205, { "extra-bold", "extrabold" }},
  { 210, { "ultra-bold", "ultrabold", "black" }}
};

/* Table of slant numeric values and their names.  This table must be
   sorted by numeric values in ascending order.  */

105
static const struct table_entry slant_table[] =
106 107 108
{
  { 0, { "reverse-oblique", "ro" }},
  { 10, { "reverse-italic", "ri" }},
109
  { 100, { "normal", "r", "unspecified" }},
110 111 112 113 114 115 116
  { 200, { "italic" ,"i", "ot" }},
  { 210, { "oblique", "o" }}
};

/* Table of width numeric values and their names.  This table must be
   sorted by numeric values in ascending order.  */

117
static const struct table_entry width_table[] =
118 119 120 121 122
{
  { 50, { "ultra-condensed", "ultracondensed" }},
  { 63, { "extra-condensed", "extracondensed" }},
  { 75, { "condensed", "compressed", "narrow" }},
  { 87, { "semi-condensed", "semicondensed", "demicondensed" }},
123
  { 100, { "normal", "medium", "regular", "unspecified" }},
124 125 126 127 128 129
  { 113, { "semi-expanded", "semiexpanded", "demiexpanded" }},
  { 125, { "expanded" }},
  { 150, { "extra-expanded", "extraexpanded" }},
  { 200, { "ultra-expanded", "ultraexpanded", "wide" }}
};

Kenichi Handa's avatar
Kenichi Handa committed
130
extern Lisp_Object Qnormal;
Kenichi Handa's avatar
Kenichi Handa committed
131 132

/* Symbols representing keys of normal font properties.  */
133 134 135
extern Lisp_Object QCtype, QCfamily, QCweight, QCslant, QCwidth;
extern Lisp_Object QCheight, QCsize, QCname;

Kenichi Handa's avatar
Kenichi Handa committed
136
Lisp_Object QCfoundry, QCadstyle, QCregistry;
Kenichi Handa's avatar
Kenichi Handa committed
137
/* Symbols representing keys of font extra info.  */
Kenichi Handa's avatar
Kenichi Handa committed
138 139
Lisp_Object QCspacing, QCdpi, QCscalable, QCotf, QClang, QCscript, QCavgwidth;
Lisp_Object QCantialias, QCfont_entity, QCfc_unknown_spec;
140 141
/* Symbols representing values of font spacing property.  */
Lisp_Object Qc, Qm, Qp, Qd;
142 143 144
/* Special ADSTYLE properties to avoid fonts used for Latin
   characters; used in xfont.c and ftfont.c.  */
Lisp_Object Qja, Qko;
Kenichi Handa's avatar
Kenichi Handa committed
145

146 147
Lisp_Object Vfont_encoding_alist;

148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165
/* Alist of font registry symbol and the corresponding charsets
   information.  The information is retrieved from
   Vfont_encoding_alist on demand.

   Eash element has the form:
	(REGISTRY . (ENCODING-CHARSET-ID . REPERTORY-CHARSET-ID))
   or
	(REGISTRY . nil)

   In the former form, ENCODING-CHARSET-ID is an ID of a charset that
   encodes a character code to a glyph code of a font, and
   REPERTORY-CHARSET-ID is an ID of a charset that tells if a
   character is supported by a font.

   The latter form means that the information for REGISTRY couldn't be
   retrieved.  */
static Lisp_Object font_charset_alist;

166 167
/* List of all font drivers.  Each font-backend (XXXfont.c) calls
   register_font_driver in syms_of_XXXfont to register its font-driver
Kenichi Handa's avatar
Kenichi Handa committed
168 169 170
   here.  */
static struct font_driver_list *font_driver_list;

Kenichi Handa's avatar
Kenichi Handa committed
171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198


/* Creaters of font-related Lisp object.  */

Lisp_Object
font_make_spec ()
{
  Lisp_Object font_spec;
  struct font_spec *spec
    = ((struct font_spec *)
       allocate_pseudovector (VECSIZE (struct font_spec),
			      FONT_SPEC_MAX, PVEC_FONT));
  XSETFONT (font_spec, spec);
  return font_spec;
}

Lisp_Object
font_make_entity ()
{
  Lisp_Object font_entity;
  struct font_entity *entity
    = ((struct font_entity *)
       allocate_pseudovector (VECSIZE (struct font_entity),
			      FONT_ENTITY_MAX, PVEC_FONT));
  XSETFONT (font_entity, entity);
  return font_entity;
}

199 200 201
/* Create a font-object whose structure size is SIZE.  If ENTITY is
   not nil, copy properties from ENTITY to the font-object.  If
   PIXELSIZE is positive, set the `size' property to PIXELSIZE.  */
Kenichi Handa's avatar
Kenichi Handa committed
202
Lisp_Object
203
font_make_object (size, entity, pixelsize)
Kenichi Handa's avatar
Kenichi Handa committed
204
     int size;
205 206
     Lisp_Object entity;
     int pixelsize;
Kenichi Handa's avatar
Kenichi Handa committed
207 208 209 210
{
  Lisp_Object font_object;
  struct font *font
    = (struct font *) allocate_pseudovector (size, FONT_OBJECT_MAX, PVEC_FONT);
211 212
  int i;

Kenichi Handa's avatar
Kenichi Handa committed
213 214
  XSETFONT (font_object, font);

215 216 217 218 219 220
  if (! NILP (entity))
    {
      for (i = 1; i < FONT_SPEC_MAX; i++)
	font->props[i] = AREF (entity, i);
      if (! NILP (AREF (entity, FONT_EXTRA_INDEX)))
	font->props[FONT_EXTRA_INDEX]
221
	  = Fcopy_alist (AREF (entity, FONT_EXTRA_INDEX));
222 223 224
    }
  if (size > 0)
    font->props[FONT_SIZE_INDEX] = make_number (pixelsize);
Kenichi Handa's avatar
Kenichi Handa committed
225 226 227 228 229
  return font_object;
}



230
static int font_pixel_size P_ ((FRAME_PTR f, Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
231
static Lisp_Object font_open_entity P_ ((FRAME_PTR, Lisp_Object, int));
Kenichi Handa's avatar
Kenichi Handa committed
232 233
static Lisp_Object font_matching_entity P_ ((FRAME_PTR, Lisp_Object *,
					     Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
234 235 236 237

/* Number of registered font drivers.  */
static int num_font_drivers;

Kenichi Handa's avatar
Kenichi Handa committed
238 239 240

/* Return a Lispy value of a font property value at STR and LEN bytes.
   If STR is "*", it returns nil.
241 242 243
   If FORCE_SYMBOL is zero and all characters in STR are digits, it
   returns an integer.  Otherwise, it returns a symbol interned from
   STR.  */
Kenichi Handa's avatar
Kenichi Handa committed
244 245

Lisp_Object
246
font_intern_prop (str, len, force_symbol)
Kenichi Handa's avatar
Kenichi Handa committed
247 248
     char *str;
     int len;
249
     int force_symbol;
Kenichi Handa's avatar
Kenichi Handa committed
250 251
{
  int i;
252
  Lisp_Object tem;
Kenichi Handa's avatar
Kenichi Handa committed
253
  Lisp_Object obarray;
254
  int nbytes, nchars;
Kenichi Handa's avatar
Kenichi Handa committed
255 256 257

  if (len == 1 && *str == '*')
    return Qnil;
258
  if (!force_symbol && len >=1 && isdigit (*str))
Kenichi Handa's avatar
Kenichi Handa committed
259 260 261 262 263 264 265 266
    {
      for (i = 1; i < len; i++)
	if (! isdigit (str[i]))
	  break;
      if (i == len)
	return make_number (atoi (str));
    }

267 268
  /* The following code is copied from the function intern (in
     lread.c), and modified to suite our purpose.  */
Kenichi Handa's avatar
Kenichi Handa committed
269 270 271
  obarray = Vobarray;
  if (!VECTORP (obarray) || XVECTOR (obarray)->size == 0)
    obarray = check_obarray (obarray);
272
  parse_str_as_multibyte ((unsigned char *) str, len, &nchars, &nbytes);
273 274 275 276 277 278
  if (len == nchars || len != nbytes)
    /* CONTENTS contains no multibyte sequences or contains an invalid
       multibyte sequence.  We'll make a unibyte string.  */
    tem = oblookup (obarray, str, len, len);
  else
    tem = oblookup (obarray, str, nchars, len);
Kenichi Handa's avatar
Kenichi Handa committed
279 280
  if (SYMBOLP (tem))
    return tem;
281 282 283 284 285
  if (len == nchars || len != nbytes)
    tem = make_unibyte_string (str, len);
  else
    tem = make_multibyte_string (str, nchars, len);
  return Fintern (tem, obarray);
Kenichi Handa's avatar
Kenichi Handa committed
286 287
}

288
/* Return a pixel size of font-spec SPEC on frame F.  */
289

290 291 292 293 294
static int
font_pixel_size (f, spec)
     FRAME_PTR f;
     Lisp_Object spec;
{
295
#ifdef HAVE_WINDOW_SYSTEM
296 297
  Lisp_Object size = AREF (spec, FONT_SIZE_INDEX);
  double point_size;
Kenichi Handa's avatar
Kenichi Handa committed
298
  int dpi, pixel_size;
299
  Lisp_Object val;
300

301 302 303
  if (INTEGERP (size))
    return XINT (size);
  if (NILP (size))
304
    return 0;
305
  font_assert (FLOATP (size));
306
  point_size = XFLOAT_DATA (size);
Kenichi Handa's avatar
Kenichi Handa committed
307 308
  val = AREF (spec, FONT_DPI_INDEX);
  if (INTEGERP (val))
309
    dpi = XINT (val);
310 311 312 313
  else
    dpi = f->resy;
  pixel_size = POINT_TO_PIXEL (point_size, dpi);
  return pixel_size;
314 315 316
#else
  return 1;
#endif
317 318
}

Kenichi Handa's avatar
Kenichi Handa committed
319

Kenichi Handa's avatar
Kenichi Handa committed
320 321 322 323 324 325
/* Return a value of PROP's VAL (symbol or integer) to be stored in a
   font vector.  If VAL is not valid (i.e. not registered in
   font_style_table), return -1 if NOERROR is zero, and return a
   proper index if NOERROR is nonzero.  In that case, register VAL in
   font_style_table if VAL is a symbol, and return a closest index if
   VAL is an integer.  */
Kenichi Handa's avatar
Kenichi Handa committed
326

Kenichi Handa's avatar
Kenichi Handa committed
327 328
int
font_style_to_value (prop, val, noerror)
Kenichi Handa's avatar
Kenichi Handa committed
329
     enum font_property_index prop;
Kenichi Handa's avatar
Kenichi Handa committed
330 331
     Lisp_Object val;
     int noerror;
Kenichi Handa's avatar
Kenichi Handa committed
332
{
Kenichi Handa's avatar
Kenichi Handa committed
333 334
  Lisp_Object table = AREF (font_style_table, prop - FONT_WEIGHT_INDEX);
  int len = ASIZE (table);
335
  int i, j;
Kenichi Handa's avatar
Kenichi Handa committed
336

Kenichi Handa's avatar
Kenichi Handa committed
337
  if (SYMBOLP (val))
Kenichi Handa's avatar
Kenichi Handa committed
338
    {
339
      unsigned char *s;
Kenichi Handa's avatar
Kenichi Handa committed
340 341 342 343
      Lisp_Object args[2], elt;

      /* At first try exact match.  */
      for (i = 0; i < len; i++)
344 345 346 347
	for (j = 1; j < ASIZE (AREF (table, i)); j++)
	  if (EQ (val, AREF (AREF (table, i), j)))
	    return ((XINT (AREF (AREF (table, i), 0)) << 8)
		    | (i << 4) | (j - 1));
Kenichi Handa's avatar
Kenichi Handa committed
348
      /* Try also with case-folding match.  */
349
      s = SDATA (SYMBOL_NAME (val));
Kenichi Handa's avatar
Kenichi Handa committed
350
      for (i = 0; i < len; i++)
351 352 353
	for (j = 1; j < ASIZE (AREF (table, i)); j++)
	  {
	    elt = AREF (AREF (table, i), j);
354
	    if (xstrcasecmp (s, SDATA (SYMBOL_NAME (elt))) == 0)
355 356 357
	      return ((XINT (AREF (AREF (table, i), 0)) << 8)
		      | (i << 4) | (j - 1));
	  }
Kenichi Handa's avatar
Kenichi Handa committed
358 359 360 361
      if (! noerror)
	return -1;
      if (len == 255)
	abort ();
362
      elt = Fmake_vector (make_number (2), make_number (100));
363
      ASET (elt, 1, val);
Kenichi Handa's avatar
Kenichi Handa committed
364
      args[0] = table;
365
      args[1] = Fmake_vector (make_number (1), elt);
Kenichi Handa's avatar
Kenichi Handa committed
366
      ASET (font_style_table, prop - FONT_WEIGHT_INDEX, Fvconcat (2, args));
367
      return (100 << 8) | (i << 4);
Kenichi Handa's avatar
Kenichi Handa committed
368
    }
Kenichi Handa's avatar
Kenichi Handa committed
369 370
  else
    {
371
      int i, last_n;
Kenichi Handa's avatar
Kenichi Handa committed
372
      int numeric = XINT (val);
Kenichi Handa's avatar
Kenichi Handa committed
373

374
      for (i = 0, last_n = -1; i < len; i++)
Kenichi Handa's avatar
Kenichi Handa committed
375
	{
376
	  int n = XINT (AREF (AREF (table, i), 0));
Kenichi Handa's avatar
Kenichi Handa committed
377

Kenichi Handa's avatar
Kenichi Handa committed
378
	  if (numeric == n)
379
	    return (n << 8) | (i << 4);
Kenichi Handa's avatar
Kenichi Handa committed
380 381 382 383
	  if (numeric < n)
	    {
	      if (! noerror)
		return -1;
384 385
	      return ((i == 0 || n - numeric < numeric - last_n)
		      ? (n << 8) | (i << 4): (last_n << 8 | ((i - 1) << 4)));
Kenichi Handa's avatar
Kenichi Handa committed
386 387 388 389 390
	    }
	  last_n = n;
	}
      if (! noerror)
	return -1;
391
      return ((last_n << 8) | ((i - 1) << 4));
Kenichi Handa's avatar
Kenichi Handa committed
392 393
    }
}
Kenichi Handa's avatar
Kenichi Handa committed
394 395

Lisp_Object
396 397
font_style_symbolic (font, prop, for_face)
     Lisp_Object font;
Kenichi Handa's avatar
Kenichi Handa committed
398 399
     enum font_property_index prop;
     int for_face;
Kenichi Handa's avatar
Kenichi Handa committed
400
{
401
  Lisp_Object val = AREF (font, prop);
402 403
  Lisp_Object table, elt;
  int i;
Kenichi Handa's avatar
Kenichi Handa committed
404

Kenichi Handa's avatar
Kenichi Handa committed
405 406 407
  if (NILP (val))
    return Qnil;
  table = AREF (font_style_table, prop - FONT_WEIGHT_INDEX);
408 409 410 411
  i = XINT (val) & 0xFF;
  font_assert (((i >> 4) & 0xF) < ASIZE (table));
  elt = AREF (table, ((i >> 4) & 0xF));
  font_assert ((i & 0xF) + 1 < ASIZE (elt));
412
  return (for_face ? AREF (elt, 1) : AREF (elt, (i & 0xF) + 1));
413 414
}

Kenichi Handa's avatar
Kenichi Handa committed
415 416
extern Lisp_Object Vface_alternative_font_family_alist;

417 418
extern Lisp_Object find_font_encoding P_ ((Lisp_Object));

Kenichi Handa's avatar
Kenichi Handa committed
419

420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440
/* Return ENCODING or a cons of ENCODING and REPERTORY of the font
   FONTNAME.  ENCODING is a charset symbol that specifies the encoding
   of the font.  REPERTORY is a charset symbol or nil.  */

Lisp_Object
find_font_encoding (fontname)
     Lisp_Object fontname;
{
  Lisp_Object tail, elt;

  for (tail = Vfont_encoding_alist; CONSP (tail); tail = XCDR (tail))
    {
      elt = XCAR (tail);
      if (CONSP (elt)
	  && STRINGP (XCAR (elt))
	  && fast_string_match_ignore_case (XCAR (elt), fontname) >= 0
	  && (SYMBOLP (XCDR (elt))
	      ? CHARSETP (XCDR (elt))
	      : CONSP (XCDR (elt)) && CHARSETP (XCAR (XCDR (elt)))))
	return (XCDR (elt));
    }
441
  return Qnil;
442 443
}

444 445 446 447 448 449 450 451 452 453 454 455
/* Return encoding charset and repertory charset for REGISTRY in
   ENCODING and REPERTORY correspondingly.  If correct information for
   REGISTRY is available, return 0.  Otherwise return -1.  */

int
font_registry_charsets (registry, encoding, repertory)
     Lisp_Object registry;
     struct charset **encoding, **repertory;
{
  Lisp_Object val;
  int encoding_id, repertory_id;

Kenichi Handa's avatar
Kenichi Handa committed
456
  val = Fassoc_string (registry, font_charset_alist, Qt);
457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
  if (! NILP (val))
    {
      val = XCDR (val);
      if (NILP (val))
	return -1;
      encoding_id = XINT (XCAR (val));
      repertory_id = XINT (XCDR (val));
    }
  else
    {
      val = find_font_encoding (SYMBOL_NAME (registry));
      if (SYMBOLP (val) && CHARSETP (val))
	{
	  encoding_id = repertory_id = XINT (CHARSET_SYMBOL_ID (val));
	}
      else if (CONSP (val))
	{
	  if (! CHARSETP (XCAR (val)))
	    goto invalid_entry;
	  encoding_id = XINT (CHARSET_SYMBOL_ID (XCAR (val)));
	  if (NILP (XCDR (val)))
	    repertory_id = -1;
	  else
	    {
	      if (! CHARSETP (XCDR (val)))
		goto invalid_entry;
	      repertory_id = XINT (CHARSET_SYMBOL_ID (XCDR (val)));
	    }
485
	}
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
      else
	goto invalid_entry;
      val = Fcons (make_number (encoding_id), make_number (repertory_id));
      font_charset_alist
	= nconc2 (font_charset_alist, Fcons (Fcons (registry, val), Qnil));
    }

  if (encoding)
    *encoding = CHARSET_FROM_ID (encoding_id);
  if (repertory)
    *repertory = repertory_id >= 0 ? CHARSET_FROM_ID (repertory_id) : NULL;
  return 0;

 invalid_entry:
  font_charset_alist
    = nconc2 (font_charset_alist, Fcons (Fcons (registry, Qnil), Qnil));
  return -1;
}

Kenichi Handa's avatar
Kenichi Handa committed
505

506 507 508
/* Font property value validaters.  See the comment of
   font_property_table for the meaning of the arguments.  */

Kenichi Handa's avatar
Kenichi Handa committed
509
static Lisp_Object font_prop_validate P_ ((int, Lisp_Object, Lisp_Object));
510 511 512 513
static Lisp_Object font_prop_validate_symbol P_ ((Lisp_Object, Lisp_Object));
static Lisp_Object font_prop_validate_style P_ ((Lisp_Object, Lisp_Object));
static Lisp_Object font_prop_validate_non_neg P_ ((Lisp_Object, Lisp_Object));
static Lisp_Object font_prop_validate_spacing P_ ((Lisp_Object, Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
514
static int get_font_prop_index P_ ((Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
515 516

static Lisp_Object
517
font_prop_validate_symbol (prop, val)
518
     Lisp_Object prop, val;
Kenichi Handa's avatar
Kenichi Handa committed
519 520
{
  if (STRINGP (val))
Kenichi Handa's avatar
Kenichi Handa committed
521 522
    val = Fintern (val, Qnil);
  if (! SYMBOLP (val))
Kenichi Handa's avatar
Kenichi Handa committed
523
    val = Qerror;
Kenichi Handa's avatar
Kenichi Handa committed
524 525
  else if (EQ (prop, QCregistry))
    val = Fintern (Fdowncase (SYMBOL_NAME (val)), Qnil);
Kenichi Handa's avatar
Kenichi Handa committed
526 527 528
  return val;
}

Kenichi Handa's avatar
Kenichi Handa committed
529

Kenichi Handa's avatar
Kenichi Handa committed
530
static Lisp_Object
Kenichi Handa's avatar
Kenichi Handa committed
531 532
font_prop_validate_style (style, val)
     Lisp_Object style, val;
Kenichi Handa's avatar
Kenichi Handa committed
533
{
Kenichi Handa's avatar
Kenichi Handa committed
534 535 536 537 538
  enum font_property_index prop = (EQ (style, QCweight) ? FONT_WEIGHT_INDEX
				   : EQ (style, QCslant) ? FONT_SLANT_INDEX
				   : FONT_WIDTH_INDEX);
  int n;
  if (INTEGERP (val))
Kenichi Handa's avatar
Kenichi Handa committed
539
    {
Kenichi Handa's avatar
Kenichi Handa committed
540
      n = XINT (val);
541
      if (((n >> 4) & 0xF)
Kenichi Handa's avatar
Kenichi Handa committed
542
	  >= ASIZE (AREF (font_style_table, prop - FONT_WEIGHT_INDEX)))
Kenichi Handa's avatar
Kenichi Handa committed
543 544 545
	val = Qerror;
      else
	{
546 547 548 549 550
	  Lisp_Object elt = AREF (AREF (font_style_table, prop - FONT_WEIGHT_INDEX), (n >> 4) & 0xF);

	  if ((n & 0xF) + 1 >= ASIZE (elt))
	    val = Qerror;
	  else if (XINT (AREF (elt, 0)) != (n >> 8))
Kenichi Handa's avatar
Kenichi Handa committed
551 552 553
	    val = Qerror;
	}
    }
Kenichi Handa's avatar
Kenichi Handa committed
554 555 556 557 558 559 560 561
  else if (SYMBOLP (val))
    {
      int n = font_style_to_value (prop, val, 0);

      val = n >= 0 ? make_number (n) : Qerror;
    }
  else
    val = Qerror;
Kenichi Handa's avatar
Kenichi Handa committed
562 563 564 565
  return val;
}

static Lisp_Object
566
font_prop_validate_non_neg (prop, val)
567
     Lisp_Object prop, val;
Kenichi Handa's avatar
Kenichi Handa committed
568 569 570 571 572 573
{
  return (NATNUMP (val) || (FLOATP (val) && XFLOAT_DATA (val) >= 0)
	  ? val : Qerror);
}

static Lisp_Object
574
font_prop_validate_spacing (prop, val)
575 576 577 578
     Lisp_Object prop, val;
{
  if (NILP (val) || (NATNUMP (val) && XINT (val) <= FONT_SPACING_CHARCELL))
    return val;
579 580 581 582 583 584 585 586
  if (SYMBOLP (val) && SBYTES (SYMBOL_NAME (val)) == 1)
    {
      char spacing = SDATA (SYMBOL_NAME (val))[0];

      if (spacing == 'c' || spacing == 'C')
	return make_number (FONT_SPACING_CHARCELL);
      if (spacing == 'm' || spacing == 'M')
	return make_number (FONT_SPACING_MONO);
587
      if (spacing == 'p' || spacing == 'P')
588 589 590 591
	return make_number (FONT_SPACING_PROPORTIONAL);
      if (spacing == 'd' || spacing == 'D')
	return make_number (FONT_SPACING_DUAL);
    }
592 593 594
  return Qerror;
}

595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629
static Lisp_Object
font_prop_validate_otf (prop, val)
     Lisp_Object prop, val;
{
  Lisp_Object tail, tmp;
  int i;

  /* VAL = (SCRIPT [ LANGSYS [ GSUB-FEATURES [ GPOS-FEATURES ]]])
     GSUB-FEATURES = (FEATURE ... [ nil FEATURE ... ]) | nil
     GPOS-FEATURES = (FEATURE ... [ nil FEATURE ... ]) | nil  */
  if (! CONSP (val))
    return Qerror;
  if (! SYMBOLP (XCAR (val)))
    return Qerror;
  tail = XCDR (val);
  if (NILP (tail))
    return val;
  if (! CONSP (tail) || ! SYMBOLP (XCAR (val)))
    return Qerror;
  for (i = 0; i < 2; i++)
    {
      tail = XCDR (tail);
      if (NILP (tail))
	return val;
      if (! CONSP (tail))
	return Qerror;
      for (tmp = XCAR (tail); CONSP (tmp); tmp = XCDR (tmp))
	if (! SYMBOLP (XCAR (tmp)))
	  return Qerror;
      if (! NILP (tmp))
	return Qerror;
    }
  return val;
}

630 631
/* Structure of known font property keys and validater of the
   values.  */
Kenichi Handa's avatar
Kenichi Handa committed
632 633
struct
{
634
  /* Pointer to the key symbol.  */
Kenichi Handa's avatar
Kenichi Handa committed
635
  Lisp_Object *key;
636 637 638 639
  /* Function to validate PROP's value VAL, or NULL if any value is
     ok.  The value is VAL or its regularized value if VAL is valid,
     and Qerror if not.  */
  Lisp_Object (*validater) P_ ((Lisp_Object prop, Lisp_Object val));
640 641
} font_property_table[] =
  { { &QCtype, font_prop_validate_symbol },
Kenichi Handa's avatar
Kenichi Handa committed
642 643 644 645 646 647 648
    { &QCfoundry, font_prop_validate_symbol },
    { &QCfamily, font_prop_validate_symbol },
    { &QCadstyle, font_prop_validate_symbol },
    { &QCregistry, font_prop_validate_symbol },
    { &QCweight, font_prop_validate_style },
    { &QCslant, font_prop_validate_style },
    { &QCwidth, font_prop_validate_style },
649 650 651
    { &QCsize, font_prop_validate_non_neg },
    { &QCdpi, font_prop_validate_non_neg },
    { &QCspacing, font_prop_validate_spacing },
Kenichi Handa's avatar
Kenichi Handa committed
652 653 654 655 656 657
    { &QCavgwidth, font_prop_validate_non_neg },
    /* The order of the above entries must match with enum
       font_property_index.  */
    { &QClang, font_prop_validate_symbol },
    { &QCscript, font_prop_validate_symbol },
    { &QCotf, font_prop_validate_otf }
Kenichi Handa's avatar
Kenichi Handa committed
658 659
  };

660
/* Size (number of elements) of the above table.  */
661 662 663
#define FONT_PROPERTY_TABLE_SIZE \
  ((sizeof font_property_table) / (sizeof *font_property_table))

664
/* Return an index number of font property KEY or -1 if KEY is not an
Kenichi Handa's avatar
Kenichi Handa committed
665
   already known property.  */
666

667
static int
Kenichi Handa's avatar
Kenichi Handa committed
668
get_font_prop_index (key)
Kenichi Handa's avatar
Kenichi Handa committed
669 670
     Lisp_Object key;
{
Kenichi Handa's avatar
Kenichi Handa committed
671 672 673 674 675
  int i;

  for (i = 0; i < FONT_PROPERTY_TABLE_SIZE; i++)
    if (EQ (key, *font_property_table[i].key))
      return i;
676
  return -1;
Kenichi Handa's avatar
Kenichi Handa committed
677 678
}

Kenichi Handa's avatar
Kenichi Handa committed
679 680 681
/* Validate the font property.  The property key is specified by the
   symbol PROP, or the index IDX (if PROP is nil).  If VAL is invalid,
   signal an error.  The value is VAL or the regularized one.  */
682

Kenichi Handa's avatar
Kenichi Handa committed
683
static Lisp_Object
Kenichi Handa's avatar
Kenichi Handa committed
684 685 686
font_prop_validate (idx, prop, val)
     int idx;
     Lisp_Object prop, val;
Kenichi Handa's avatar
Kenichi Handa committed
687
{
Kenichi Handa's avatar
Kenichi Handa committed
688
  Lisp_Object validated;
Kenichi Handa's avatar
Kenichi Handa committed
689

690 691
  if (NILP (val))
    return val;
Kenichi Handa's avatar
Kenichi Handa committed
692 693 694
  if (NILP (prop))
    prop = *font_property_table[idx].key;
  else
695
    {
Kenichi Handa's avatar
Kenichi Handa committed
696 697 698
      idx = get_font_prop_index (prop);
      if (idx < 0)
	return val;
699
    }
Kenichi Handa's avatar
Kenichi Handa committed
700 701 702 703
  validated = (font_property_table[idx].validater) (prop, val);
  if (EQ (validated, Qerror))
    signal_error ("invalid font property", Fcons (prop, val));
  return validated;
Kenichi Handa's avatar
Kenichi Handa committed
704
}
705

Kenichi Handa's avatar
Kenichi Handa committed
706 707 708

/* Store VAL as a value of extra font property PROP in FONT while
   keeping the sorting order.  Don't check the validity of VAL.  */
709

710
Lisp_Object
711
font_put_extra (font, prop, val)
712 713 714
     Lisp_Object font, prop, val;
{
  Lisp_Object extra = AREF (font, FONT_EXTRA_INDEX);
715
  Lisp_Object slot = (NILP (extra) ? Qnil : assq_no_quit (prop, extra));
716 717 718

  if (NILP (slot))
    {
Kenichi Handa's avatar
Kenichi Handa committed
719 720 721 722 723
      Lisp_Object prev = Qnil;

      while (CONSP (extra)
	     && NILP (Fstring_lessp (prop, XCAR (XCAR (extra)))))
	prev = extra, extra = XCDR (extra);
724

725
      if (NILP (prev))
726
        ASET (font, FONT_EXTRA_INDEX, Fcons (Fcons (prop, val), extra));
727
      else
728
        XSETCDR (prev, Fcons (Fcons (prop, val), extra));
729

730
      return val;
731 732
    }
  XSETCDR (slot, val);
733 734
  if (NILP (val))
    ASET (font, FONT_EXTRA_INDEX, Fdelq (slot, extra));
735
  return val;
736 737
}

Kenichi Handa's avatar
Kenichi Handa committed
738 739 740

/* Font name parser and unparser */

741 742 743
static int parse_matrix P_ ((char *));
static int font_expand_wildcards P_ ((Lisp_Object *, int));
static int font_parse_name P_ ((char *, Lisp_Object));
Kenichi Handa's avatar
Kenichi Handa committed
744

745
/* An enumerator for each field of an XLFD font name.  */
Kenichi Handa's avatar
Kenichi Handa committed
746 747 748 749 750 751 752 753
enum xlfd_field_index
{
  XLFD_FOUNDRY_INDEX,
  XLFD_FAMILY_INDEX,
  XLFD_WEIGHT_INDEX,
  XLFD_SLANT_INDEX,
  XLFD_SWIDTH_INDEX,
  XLFD_ADSTYLE_INDEX,
754 755
  XLFD_PIXEL_INDEX,
  XLFD_POINT_INDEX,
Kenichi Handa's avatar
Kenichi Handa committed
756 757 758 759 760 761 762 763 764
  XLFD_RESX_INDEX,
  XLFD_RESY_INDEX,
  XLFD_SPACING_INDEX,
  XLFD_AVGWIDTH_INDEX,
  XLFD_REGISTRY_INDEX,
  XLFD_ENCODING_INDEX,
  XLFD_LAST_INDEX
};

765
/* An enumerator for mask bit corresponding to each XLFD field.  */
766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784
enum xlfd_field_mask
{
  XLFD_FOUNDRY_MASK = 0x0001,
  XLFD_FAMILY_MASK = 0x0002,
  XLFD_WEIGHT_MASK = 0x0004,
  XLFD_SLANT_MASK = 0x0008,
  XLFD_SWIDTH_MASK = 0x0010,
  XLFD_ADSTYLE_MASK = 0x0020,
  XLFD_PIXEL_MASK = 0x0040,
  XLFD_POINT_MASK = 0x0080,
  XLFD_RESX_MASK = 0x0100,
  XLFD_RESY_MASK = 0x0200,
  XLFD_SPACING_MASK = 0x0400,
  XLFD_AVGWIDTH_MASK = 0x0800,
  XLFD_REGISTRY_MASK = 0x1000,
  XLFD_ENCODING_MASK = 0x2000
};


Kenichi Handa's avatar
Kenichi Handa committed
785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817
/* Parse P pointing the pixel/point size field of the form
   `[A B C D]' which specifies a transformation matrix:

	A  B  0
	C  D  0
	0  0  1

   by which all glyphs of the font are transformed.  The spec says
   that scalar value N for the pixel/point size is equivalent to:
   A = N * resx/resy, B = C = 0, D = N.

   Return the scalar value N if the form is valid.  Otherwise return
   -1.  */

static int
parse_matrix (p)
     char *p;
{
  double matrix[4];
  char *end;
  int i;

  for (i = 0, p++; i < 4 && *p && *p != ']'; i++)
    {
      if (*p == '~')
	matrix[i] = - strtod (p + 1, &end);
      else
	matrix[i] = strtod (p, &end);
      p = end;
    }
  return (i == 4 ? (int) matrix[3] : -1);
}

818 819 820 821
/* Expand a wildcard field in FIELD (the first N fields are filled) to
   multiple fields to fill in all 14 XLFD fields while restring a
   field position by its contents.  */

822
static int
823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839
font_expand_wildcards (field, n)
     Lisp_Object field[XLFD_LAST_INDEX];
     int n;
{
  /* Copy of FIELD.  */
  Lisp_Object tmp[XLFD_LAST_INDEX];
  /* Array of information about where this element can go.  Nth
     element is for Nth element of FIELD. */
  struct {
    /* Minimum possible field.  */
    int from;
    /* Maxinum possible field.  */
    int to;
    /* Bit mask of possible field.  Nth bit corresponds to Nth field.  */
    int mask;
  } range[XLFD_LAST_INDEX];
  int i, j;
840
  int range_from, range_to;
841 842 843 844 845 846
  unsigned range_mask;

#define XLFD_SYMBOL_MASK (XLFD_FOUNDRY_MASK | XLFD_FAMILY_MASK \
			  | XLFD_ADSTYLE_MASK  | XLFD_REGISTRY_MASK)
#define XLFD_NULL_MASK (XLFD_FOUNDRY_MASK | XLFD_ADSTYLE_MASK)
#define XLFD_LARGENUM_MASK (XLFD_POINT_MASK | XLFD_RESX_MASK | XLFD_RESY_MASK \
847
			    | XLFD_AVGWIDTH_MASK)
848 849 850 851 852 853 854 855
#define XLFD_REGENC_MASK (XLFD_REGISTRY_MASK | XLFD_ENCODING_MASK)

  /* Initialize RANGE_MASK for FIELD[0] which can be 0th to (14 - N)th
     field.  The value is shifted to left one bit by one in the
     following loop.  */
  for (i = 0, range_mask = 0; i <= 14 - n; i++)
    range_mask = (range_mask << 1) | 1;

856 857 858 859
  /* The triplet RANGE_FROM, RANGE_TO, and RANGE_MASK is a
     position-based retriction for FIELD[I].  */
  for (i = 0, range_from = 0, range_to = 14 - n; i < n;
       i++, range_from++, range_to++, range_mask <<= 1)
860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881
    {
      Lisp_Object val = field[i];

      tmp[i] = val;
      if (NILP (val))
	{
	  /* Wildcard.  */
	  range[i].from = range_from;
	  range[i].to = range_to;
	  range[i].mask = range_mask;
	}
      else
	{
	  /* The triplet FROM, TO, and MASK is a value-based
	     retriction for FIELD[I].  */
	  int from, to;
	  unsigned mask;

	  if (INTEGERP (val))
	    {
	      int numeric = XINT (val);

882 883 884
	      if (i + 1 == n)
		from = to = XLFD_ENCODING_INDEX,
		  mask = XLFD_ENCODING_MASK;
885 886 887
	      else if (numeric == 0)
		from = XLFD_PIXEL_INDEX, to = XLFD_AVGWIDTH_INDEX,
		  mask = XLFD_PIXEL_MASK | XLFD_LARGENUM_MASK;
888 889 890
	      else if (numeric <= 48)
		from = to = XLFD_PIXEL_INDEX,
		  mask = XLFD_PIXEL_MASK;
891
	      else
892
		from = XLFD_POINT_INDEX, to = XLFD_AVGWIDTH_INDEX,
893 894
		  mask = XLFD_LARGENUM_MASK;
	    }
Kenichi Handa's avatar
Kenichi Handa committed
895
	  else if (SBYTES (SYMBOL_NAME (val)) == 0)
896 897 898 899 900 901 902 903 904 905 906 907 908 909 910
	    from = XLFD_FOUNDRY_INDEX, to = XLFD_ADSTYLE_INDEX,
	      mask = XLFD_NULL_MASK;
	  else if (i == 0)
	    from = to = XLFD_FOUNDRY_INDEX, mask = XLFD_FOUNDRY_MASK;
	  else if (i + 1 == n)
	    {
	      Lisp_Object name = SYMBOL_NAME (val);

	      if (SDATA (name)[SBYTES (name) - 1] == '*')
		from = XLFD_REGISTRY_INDEX, to = XLFD_ENCODING_INDEX,
		  mask = XLFD_REGENC_MASK;
	      else
		from = to = XLFD_ENCODING_INDEX,
		  mask = XLFD_ENCODING_MASK;
	    }
911 912
	  else if (range_from <= XLFD_WEIGHT_INDEX
		   && range_to >= XLFD_WEIGHT_INDEX
Kenichi Handa's avatar
Kenichi Handa committed
913
		   && FONT_WEIGHT_NAME_NUMERIC (val) >= 0)
914
	    from = to = XLFD_WEIGHT_INDEX, mask = XLFD_WEIGHT_MASK;
915 916
	  else if (range_from <= XLFD_SLANT_INDEX
		   && range_to >= XLFD_SLANT_INDEX
Kenichi Handa's avatar
Kenichi Handa committed
917
		   && FONT_SLANT_NAME_NUMERIC (val) >= 0)
918
	    from = to = XLFD_SLANT_INDEX, mask = XLFD_SLANT_MASK;
919 920
	  else if (range_from <= XLFD_SWIDTH_INDEX
		   && range_to >= XLFD_SWIDTH_INDEX
Kenichi Handa's avatar
Kenichi Handa committed
921
		   && FONT_WIDTH_NAME_NUMERIC (val) >= 0)
922 923 924
	    from = to = XLFD_SWIDTH_INDEX, mask = XLFD_SWIDTH_MASK;
	  else
	    {
925
	      if (EQ (val, Qc) || EQ (val, Qm) || EQ (val, Qp) || EQ (val, Qd))
926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948
		from = to = XLFD_SPACING_INDEX, mask = XLFD_SPACING_MASK;
	      else
		from = XLFD_FOUNDRY_INDEX, to = XLFD_ENCODING_INDEX,
		  mask = XLFD_SYMBOL_MASK;
	    }

	  /* Merge position-based and value-based restrictions.  */
	  mask &= range_mask;
	  while (from < range_from)
	    mask &= ~(1 << from++);
	  while (from < 14 && ! (mask & (1 << from)))
	    from++;
	  while (to > range_to)
	    mask &= ~(1 << to--);
	  while (to >= 0 && ! (mask & (1 << to)))
	    to--;
	  if (from > to)
	    return -1;
	  range[i].from = from;
	  range[i].to = to;
	  range[i].mask = mask;

	  if (from > range_from || to < range_to)
949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982
	    {
	      /* The range is narrowed by value-based restrictions.
		 Reflect it to the other fields.  */

	      /* Following fields should be after FROM.  */
	      range_from = from;
	      /* Preceding fields should be before TO.  */
	      for (j = i - 1, from--, to--; j >= 0; j--, from--, to--)
		{
		  /* Check FROM for non-wildcard field.  */
		  if (! NILP (tmp[j]) && range[j].from < from)
		    {
		      while (range[j].from < from)
			range[j].mask &= ~(1 << range[j].from++);
		      while (from < 14 && ! (range[j].mask & (1 << from)))
			from++;
		      range[j].from = from;
		    }
		  else
		    from = range[j].from;
		  if (range[j].to > to)
		    {
		      while (range[j].to > to)
			range[j].mask &= ~(1 << range[j].to--);
		      while (to >= 0 && ! (range[j].mask & (1 << to)))
			to--;
		      range[j].to = to;
		    }
		  else
		    to = range[j].to;
		  if (from > to)
		    return -1;
		}
	    }
983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
	}
    }

  /* Decide all fileds from restrictions in RANGE.  */
  for (i = j = 0; i < n ; i++)
    {
      if (j < range[i].from)
	{
	  if (i == 0 || ! NILP (tmp[i - 1]))
	    /* None of TMP[X] corresponds to Jth field.  */
	    return -1;
	  for (; j < range[i].from; j++)
	    field[j] = Qnil;
	}
      field[j++] = tmp[i];
    }
  if (! NILP (tmp[n - 1]) && j < XLFD_REGISTRY_INDEX)
    return -1;
  for (; j < XLFD_LAST_INDEX; j++)
    field[j] = Qnil;
  if (INTEGERP (field[XLFD_ENCODING_INDEX]))
    field[XLFD_ENCODING_INDEX]
      = Fintern (Fnumber_to_string (field[XLFD_ENCODING_INDEX]), Qnil);
  return 0;
}

1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041

#ifdef ENABLE_CHECKING
/* Match a 14-field XLFD pattern against a full XLFD font name.  */
static int
font_match_xlfd (char *pattern, char *name)
{
  while (*pattern && *name)
    {
      if (*pattern == *name)
	pattern++;
      else if (*pattern == '*')
	if (*name == pattern[1])
	  pattern += 2;
	else
	  ;
      else
	return 0;
      name++;
    }
  return 1;
}

/* Make sure the font object matches the XLFD font name.  */
static int
font_check_xlfd_parse (Lisp_Object font, char *name)
{
  char name_check[256];
  font_unparse_xlfd (font, 0, name_check, 255);
  return font_match_xlfd (name_check, name);
}

#endif

Kenichi Handa's avatar
Kenichi Handa committed
1042

1043
/* Parse NAME (null terminated) as XLFD and store information in FONT
1044 1045 1046 1047 1048 1049 1050 1051
   (font-spec or font-entity).  Size property of FONT is set as
   follows:
	specified XLFD fields		FONT property
	---------------------		-------------
	PIXEL_SIZE			PIXEL_SIZE (Lisp integer)
	POINT_SIZE and RESY		calculated pixel size (Lisp integer)
	POINT_SIZE			POINT_SIZE/10 (Lisp float)

1052
   If NAME is successfully parsed, return 0.  Otherwise return -1.
1053

1054 1055
   FONT is usually a font-spec, but when this function is called from
   X font backend driver, it is a font-entity.  In that case, NAME is
Kenichi Handa's avatar
Kenichi Handa committed
1056
   a fully specified XLFD.  */
Kenichi Handa's avatar
Kenichi Handa committed
1057 1058

int
1059
font_parse_xlfd (name, font)
Kenichi Handa's avatar
Kenichi Handa committed
1060 1061 1062 1063
     char *name;
     Lisp_Object font;
{
  int len = strlen (name);
Kenichi Handa's avatar
Kenichi Handa committed
1064
  int i, j, n;
1065
  char *f[XLFD_LAST_INDEX + 1];
Kenichi Handa's avatar
Kenichi Handa committed
1066
  Lisp_Object val;
1067
  char *p;
Kenichi Handa's avatar
Kenichi Handa committed
1068

1069
  if (len > 255 || !len)
Kenichi Handa's avatar
Kenichi Handa committed
1070 1071
    /* Maximum XLFD name length is 255. */
    return -1;
1072
  /* Accept "*-.." as a fully specified XLFD. */
1073
  if (name[0] == '*' && (len == 1 || name[1] == '-'))
1074 1075 1076 1077
    i = 1, f[XLFD_FOUNDRY_INDEX] = name;
  else
    i = 0;
  for (p = name + i; *p; p++)
Kenichi Handa's avatar
Kenichi Handa committed
1078 1079 1080 1081 1082 1083 1084
    if (*p == '-')
      {
	f[i++] = p + 1;
	if (i == XLFD_LAST_INDEX)
	  break;
      }
  f[i] = name + len;
Kenichi Handa's avatar
Kenichi Handa committed
1085

1086 1087
#define INTERN_FIELD(N) font_intern_prop (f[N], f[(N) + 1] - 1 - f[N], 0)
#define INTERN_FIELD_SYM(N) font_intern_prop (f[N], f[(N) + 1] - 1 - f[N], 1)
1088

Kenichi Handa's avatar