summaryrefslogtreecommitdiff
path: root/pango/pango-utils.c
blob: 29593ea26d3823043d628842a499eec9ceb3e4b0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
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
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
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
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
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
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
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
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
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
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
/* Pango
 * pango-utils.c: Utilities for internal functions and modules
 *
 * Copyright (C) 2000 Red Hat Software
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

#include <errno.h>
#include <string.h>
#include <stdlib.h>

#include "config.h"

#include "pango-font.h"
#include "pango-utils.h"

#ifdef HAVE_FRIBIDI
#include <fribidi/fribidi.h>
#endif

#ifndef HAVE_FLOCKFILE
#  define flockfile(f) (void)1
#  define funlockfile(f) (void)1
#  define getc_unlocked(f) getc(f)
#endif /* !HAVE_FLOCKFILE */

#ifdef G_OS_WIN32

#include <sys/types.h>

#define STRICT
#include <windows.h>

#endif

struct PangoAlias
{
  char *alias;
  int n_families;
  char **families;
  gboolean visible; /* Do we want/need this? */
};

GHashTable *pango_aliases_ht = NULL;

/**
 * pango_trim_string:
 * @str: a string
 * 
 * Trims leading and trailing whitespace from a string.
 * 
 * Return value: A newly-allocated string that must be freed with g_free()
 **/
char *
pango_trim_string (const char *str)
{
  int len;

  g_return_val_if_fail (str != NULL, NULL);
  
  while (*str && g_ascii_isspace (*str))
    str++;

  len = strlen (str);
  while (len > 0 && g_ascii_isspace (str[len-1]))
    len--;

  return g_strndup (str, len);
}

/**
 * pango_split_file_list:
 * @str: a comma separated list of filenames
 * 
 * Splits a G_SEARCHPATH_SEPARATOR-separated list of files, stripping
 * white space and subsituting ~/ with $HOME/.
 * 
 * Return value: a list of strings to be freed with g_strfreev()
 **/
char **
pango_split_file_list (const char *str)
{
  int i = 0;
  int j;
  char **files;

  files = g_strsplit (str, G_SEARCHPATH_SEPARATOR_S, -1);

  while (files[i])
    {
      char *file = pango_trim_string (files[i]);

      /* If the resulting file is empty, skip it */
      if (file[0] == '\0')
	{
	  g_free(file);
	  g_free (files[i]);
	  
	  for (j = i + 1; files[j]; j++)
	    files[j - 1] = files[j];
	  
	  files[j - 1] = NULL;

	  continue;
	}
#ifndef G_OS_WIN32
      /* '~' is a quite normal and common character in file names on
       * Windows, especially in the 8.3 versions of long file names, which
       * still occur now and then. Also, few Windows user are aware of the
       * Unix shell convention that '~' stands for the home directory,
       * even if they happen to have a home directory.
       */
      if (file[0] == '~' && file[1] == G_DIR_SEPARATOR)
	{
	  char *tmp = g_strconcat (g_get_home_dir(), file + 1, NULL);
	  g_free (file);
	  file = tmp;
	}
#endif
      g_free (files[i]);
      files[i] = file;
	
      i++;
    }

  return files;
}

/**
 * pango_read_line:
 * @stream: a stdio stream
 * @str: #GString buffer into which to write the result
 * 
 * Reads an entire line from a file into a buffer. Lines may
 * be delimited with '\n', '\r', '\n\r', or '\r\n'. The delimiter
 * is not written into the buffer. Text after a '#' character is treated as
 * a comment and skipped. '\' can be used to escape a # character.
 * '\' proceeding a line delimiter combines adjacent lines. A '\' proceeding
 * any other character is ignored and written into the output buffer
 * unmodified.
 * 
 * Return value: 0 if the stream was already at an %EOF character, otherwise
 *               the number of lines read (this is useful for maintaining
 *               a line number counter which doesn't combine lines with '\') 
 **/
gint
pango_read_line (FILE *stream, GString *str)
{
  gboolean quoted = FALSE;
  gboolean comment = FALSE;
  int n_read = 0;
  int lines = 1;
  
  flockfile (stream);

  g_string_truncate (str, 0);
  
  while (1)
    {
      int c;
      
      c = getc_unlocked (stream);

      if (c == EOF)
	{
	  if (quoted)
	    g_string_append_c (str, '\\');
	  
	  goto done;
	}
      else
	n_read++;

      if (quoted)
	{
	  quoted = FALSE;
	  
	  switch (c)
	    {
	    case '#':
	      g_string_append_c (str, '#');
	      break;
	    case '\r':
	    case '\n':
	      {
		int next_c = getc_unlocked (stream);

		if (!(next_c == EOF ||
		      (c == '\r' && next_c == '\n') ||
		      (c == '\n' && next_c == '\r')))
		  ungetc (next_c, stream);

		lines++;
		
		break;
	      }
	    default:
	      g_string_append_c (str, '\\');	      
	      g_string_append_c (str, c);
	    }
	}
      else
	{
	  switch (c)
	    {
	    case '#':
	      comment = TRUE;
	      break;
	    case '\\':
	      if (!comment)
		quoted = TRUE;
	      break;
	    case '\n':
	      {
		int next_c = getc_unlocked (stream);

		if (!(c == EOF ||
		      (c == '\r' && next_c == '\n') ||
		      (c == '\n' && next_c == '\r')))
		  ungetc (next_c, stream);

		goto done;
	      }
	    default:
	      if (!comment)
		g_string_append_c (str, c);
	    }
	}
    }

 done:

  funlockfile (stream);

  return (n_read > 0) ? lines : 0;
}

/**
 * pango_skip_space:
 * @pos: in/out string position
 * 
 * Skips 0 or more characters of white space.
 * 
 * Return value: %FALSE if skipping the white space leaves
 * the position at a '\0' character.
 **/
gboolean
pango_skip_space (const char **pos)
{
  const char *p = *pos;
  
  while (g_ascii_isspace (*p))
    p++;

  *pos = p;

  return !(*p == '\0');
}

/**
 * pango_scan_word:
 * @pos: in/out string position
 * @out: a #GString into which to write the result
 * 
 * Scans a word into a #GString buffer. A word consists
 * of [A-Za-z_] followed by zero or more [A-Za-z_0-9]
 * Leading white space is skipped.
 * 
 * Return value: %FALSE if a parse error occured. 
 **/
gboolean
pango_scan_word (const char **pos, GString *out)
{
  const char *p = *pos;

  while (g_ascii_isspace (*p))
    p++;
  
  if (!((*p >= 'A' && *p <= 'Z') ||
	(*p >= 'a' && *p <= 'z') ||
	*p == '_'))
    return FALSE;

  g_string_truncate (out, 0);
  g_string_append_c (out, *p);
  p++;

  while ((*p >= 'A' && *p <= 'Z') ||
	 (*p >= 'a' && *p <= 'z') ||
	 (*p >= '0' && *p <= '9') ||
	 *p == '_')
    {
      g_string_append_c (out, *p);
      p++;
    }

  *pos = p;

  return TRUE;
}

/**
 * pango_scan_string:
 * @pos: in/out string position
 * @out: a #GString into which to write the result
 * 
 * Scans a string into a #GString buffer. The string may either
 * be a sequence of non-white-space characters, or a quoted
 * string with '"'. Instead a quoted string, '\"' represents
 * a literal quote. Leading white space outside of quotes is skipped.
 * 
 * Return value: %FALSE if a parse error occured.
 **/
gboolean
pango_scan_string (const char **pos, GString *out)
{
  const char *p = *pos;
  
  while (g_ascii_isspace (*p))
    p++;

  if (!*p)
    return FALSE;
  else if (*p == '"')
    {
      gboolean quoted = FALSE;
      g_string_truncate (out, 0);

      p++;

      while (TRUE)
	{
	  if (quoted)
	    {
	      int c = *p;
	      
	      switch (c)
		{
		case '\0':
		  return FALSE;
		case 'n':
		  c = '\n';
		  break;
		case 't':
		  c = '\t';
		  break;
		}
	      
	      quoted = FALSE;
	      g_string_append_c (out, c);
	    }
	  else
	    {
	      switch (*p)
		{
		case '\0':
		  return FALSE;
		case '\\':
		  quoted = TRUE;
		  break;
		case '"':
		  p++;
		  goto done;
		default:
		  g_string_append_c (out, *p);
		  break;
		}
	    }
	  p++;
	}
    done:
      ;
    }
  else
    {
      g_string_truncate (out, 0);

      while (*p && !g_ascii_isspace (*p))
	{
	  g_string_append_c (out, *p);
	  p++;
	}
    }

  *pos = p;

  return TRUE;
}

/**
 * pango_scan_int:
 * @pos: in/out string position
 * @out: an int into which to write the result
 * 
 * Scans an integer. An integer consists
 * of up to 31 decimal digits. 
 * Leading white space is skipped.
 * 
 * Return value: %FALSE if a parse error occured.
 **/
gboolean
pango_scan_int (const char **pos, int *out)
{
  int i = 0;
  char buf[32];
  const char *p = *pos;

  while (g_ascii_isspace (*p))
    p++;
  
  if (*p < '0' || *p > '9')
    return FALSE;

  while ((*p >= '0') && (*p <= '9') && i < sizeof(buf))
    {
      buf[i] = *p;
      i++;
      p++;
    }

  if (i == sizeof(buf))
    return FALSE;
  else
    buf[i] = '\0';

  *out = atoi (buf);
  *pos = p;

  return TRUE;
}

static GHashTable *config_hash = NULL;

static void
read_config_file (const char *filename, gboolean enoent_error)
{
  FILE *file;
    
  GString *line_buffer;
  GString *tmp_buffer1;
  GString *tmp_buffer2;
  char *errstring = NULL;
  const char *pos;
  char *section = NULL;
  int line = 0;

  file = fopen (filename, "r");
  if (!file)
    {
      if (errno != ENOENT || enoent_error)
	fprintf (stderr, "Pango:%s: Error opening config file: %s\n",
		 filename, g_strerror (errno));
      return;
    }
  
  line_buffer = g_string_new (NULL);
  tmp_buffer1 = g_string_new (NULL);
  tmp_buffer2 = g_string_new (NULL);

  while (pango_read_line (file, line_buffer))
    {
      line++;

      pos = line_buffer->str;
      if (!pango_skip_space (&pos))
	continue;

      if (*pos == '[')	/* Section */
	{
	  pos++;
	  if (!pango_skip_space (&pos) ||
	      !pango_scan_word (&pos, tmp_buffer1) ||
	      !pango_skip_space (&pos) ||
	      *(pos++) != ']' ||
	      pango_skip_space (&pos))
	    {
	      errstring = g_strdup ("Error parsing [SECTION] declaration");
	      goto error;
	    }

	  section = g_strdup (tmp_buffer1->str);
	}
      else			/* Key */
	{
	  gboolean empty = FALSE;
	  gboolean append = FALSE;
	  char *k, *v;

	  if (!section)
	    {
	      errstring = g_strdup ("A [SECTION] declaration must occur first");
	      goto error;
	    }

	  if (!pango_scan_word (&pos, tmp_buffer1) ||
	      !pango_skip_space (&pos))
	    {
	      errstring = g_strdup ("Line is not of the form KEY=VALUE or KEY+=VALUE");
	      goto error;
	    }
	  if (*pos == '+')
	    {
	      append = TRUE;
	      pos++;
	    }

	  if (*(pos++) != '=')
	    {
	      errstring = g_strdup ("Line is not of the form KEY=VALUE or KEY+=VALUE");
	      goto error;
	    }
	    
	  if (!pango_skip_space (&pos))
	    {
	      empty = TRUE;
	    }
	  else
	    {
	      if (!pango_scan_string (&pos, tmp_buffer2))
		{
		  errstring = g_strdup ("Error parsing value string");
		  goto error;
		}
	      if (pango_skip_space (&pos))
		{
		  errstring = g_strdup ("Junk after value string");
		  goto error;
		}
	    }

	  g_string_prepend_c (tmp_buffer1, '/');
	  g_string_prepend (tmp_buffer1, section);

	  /* Remove any existing values */
	  if (g_hash_table_lookup_extended (config_hash, tmp_buffer1->str,
					    (gpointer *)&k, (gpointer *)&v))
	    {
	      g_free (k);
	      if (append)
		{
		  g_string_prepend (tmp_buffer2, v);
		  g_free (v);
		}
	    }
	      
	  if (!empty)
	    {
	      g_hash_table_insert (config_hash,
				   g_strdup (tmp_buffer1->str),
				   g_strdup (tmp_buffer2->str));
	    }
	}
    }
      
  if (ferror (file))
    errstring = g_strdup (g_strerror(errno));
  
 error:

  if (errstring)
    {
      fprintf (stderr, "Pango:%s:%d: %s\n", filename, line, errstring);
      g_free (errstring);
    }
      
  g_free (section);
  g_string_free (line_buffer, TRUE);
  g_string_free (tmp_buffer1, TRUE);
  g_string_free (tmp_buffer2, TRUE);

  fclose (file);
}

static void
read_config ()
{
  if (!config_hash)
    {
      char *filename;
      const char *home;
      const char *envvar;
      
      config_hash = g_hash_table_new (g_str_hash, g_str_equal);
      filename = g_build_filename (pango_get_sysconf_subdirectory (),
				   "pangorc",
				   NULL);
      read_config_file (filename, FALSE);
      g_free (filename);

      home = g_get_home_dir ();
      if (home && *home)
	{
	  filename = g_build_filename (home, ".pangorc", NULL);
	  read_config_file (filename, FALSE);
	  g_free (filename);
	}

      envvar = g_getenv ("PANGO_RC_FILE");
      if (envvar)
	read_config_file (envvar, TRUE);
    }
}

/**
 * pango_config_key_get:
 * @key: Key to look up, in the form "SECTION/KEY".
 * 
 * Looks up a key in the Pango config database
 * (pseudo-win.ini style, read from $sysconfdir/pango/pangorc,
 *  ~/.pangorc, and getenv (PANGO_RC_FILE).)
 * 
 * Return value: the value, if found, otherwise %NULL. The value is a
 * newly-allocated string and must be freed with g_free().
 **/
char *
pango_config_key_get (const char *key)
{
  g_return_val_if_fail (key != NULL, NULL);
  
  read_config ();

  return g_strdup (g_hash_table_lookup (config_hash, key));
}

#ifdef G_OS_WIN32

/* DllMain function needed to tuck away the DLL name */

G_WIN32_DLLMAIN_FOR_DLL_NAME(static, dll_name)
#endif

/**
 * pango_get_sysconf_subdirectory:
 *
 * On Unix, returns the name of the "pango" subdirectory of SYSCONFDIR
 * (which is set at compile time). On Win32, returns a subdirectory of
 * the Pango installation directory (which is deduced at run time from
 * the DLL's location, or stored in the Registry).
 *
 * Return value: the Pango sysconf directory. The returned string should
 * not be freed. 
 */
G_CONST_RETURN char *
pango_get_sysconf_subdirectory (void)
{
#ifdef G_OS_WIN32
  static gchar *result = NULL;

  if (result == NULL)
    result = g_win32_get_package_installation_subdirectory
      (PACKAGE " " VERSION, dll_name, "etc\\pango");

  return result;
#else
  return SYSCONFDIR "/pango";
#endif
}

/**
 * pango_get_lib_subdirectory:
 *
 * On Unix, returns the name of the "pango" subdirectory of LIBDIR
 * (which is set at compile time). On Win32, returns the Pango
 * installation directory (which is deduced at run time from the DLL's
 * location, or stored in the Registry). The returned string should
 * not be freed.
 *
 * Return value: the Pango lib directory. The returned string should
 * not be freed. 
 */
G_CONST_RETURN char *
pango_get_lib_subdirectory (void)
{
#ifdef G_OS_WIN32
  static gchar *result = NULL;

  if (result == NULL)
    result = g_win32_get_package_installation_subdirectory
      (PACKAGE " " VERSION, dll_name, "lib\\pango");

  return result;
#else
  return LIBDIR "/pango";
#endif
}

/**
 * pango_parse_style:
 * @str: a string to parse.
 * @style: a #PangoStyle to store the result in.
 * @warn: if %TRUE, issue a g_warning() on bad input.
 * 
 * Parses a font style. The allowed values are "normal",
 * "italic" and "oblique", case variations being
 * ignored.
 * 
 * Return value: %TRUE if @str was successfully parsed.
 **/ 
gboolean
pango_parse_style (const char *str,
		   PangoStyle *style,
		   gboolean    warn)
{
  if (*str == '\0')
    return FALSE;

  switch (str[0])
    {
    case 'n':
    case 'N':
      if (g_ascii_strcasecmp (str, "normal") == 0)
	{
	  *style = PANGO_STYLE_NORMAL;
	  return TRUE;
	}
      break;
    case 'i':
      if (g_ascii_strcasecmp (str, "italic") == 0)
	{
	  *style = PANGO_STYLE_ITALIC;
	  return TRUE;
	}
      break;
    case 'o':
      if (g_ascii_strcasecmp (str, "oblique") == 0)
	{
	  *style = PANGO_STYLE_OBLIQUE;
	  return TRUE;
	}
      break;
    }
  if (warn)
    g_warning ("Style must be normal, italic, or oblique");
  
  return FALSE;
}

/**
 * pango_parse_variant:
 * @str: a string to parse.
 * @style: a #PangoVariant to store the result in.
 * @warn: if %TRUE, issue a g_warning() on bad input.
 * 
 * Parses a font variant. The allowed values are "normal"
 * and "smallcaps" or "small_caps", case variations being
 * ignored.
 * 
 * Return value: %TRUE if @str was successfully parsed.
 **/ 
gboolean
pango_parse_variant (const char   *str,
		     PangoVariant *variant,
		     gboolean	   warn)
{
  if (*str == '\0')
    return FALSE;

  switch (str[0])
    {
    case 'n':
    case 'N':
      if (g_ascii_strcasecmp (str, "normal") == 0)
	{
	  *variant = PANGO_VARIANT_NORMAL;
	  return TRUE;
	}
      break;
    case 's':
    case 'S':
      if (g_ascii_strcasecmp (str, "small_caps") == 0 ||
	  g_ascii_strcasecmp (str, "smallcaps") == 0)
	{
	  *variant = PANGO_VARIANT_SMALL_CAPS;
	  return TRUE;
	}
      break;
    }
  
  if (warn)
    g_warning ("Variant must be normal or small_caps");
  return FALSE;
}

/**
 * pango_parse_weight:
 * @str: a string to parse.
 * @style: a #PangoWeight to store the result in.
 * @warn: if %TRUE, issue a g_warning() on bad input.
 * 
 * Parses a font weight. The allowed values are "heavy",
 * "ultrabold", "bold", "normal", "light", "ultraleight" 
 * and integers. Case variations are ignored.
 * 
 * Return value: %TRUE if @str was successfully parsed.
 **/ 
gboolean
pango_parse_weight (const char  *str,
		    PangoWeight *weight,
		    gboolean     warn)
{
  if (*str == '\0')
    return FALSE;

  switch (str[0])
    {
    case 'b':
    case 'B':
      if (g_ascii_strcasecmp (str, "bold") == 0)
	{
	  *weight = PANGO_WEIGHT_BOLD;
	  return TRUE;
	}
      break;
    case 'h':
    case 'H':
      if (g_ascii_strcasecmp (str, "heavy") == 0)
	{
	  *weight = PANGO_WEIGHT_HEAVY;
	  return TRUE;
	}
      break;
    case 'l':
    case 'L':
      if (g_ascii_strcasecmp (str, "light") == 0)
	{
	  *weight = PANGO_WEIGHT_LIGHT;
	  return TRUE;
	}
      break;
    case 'n':
    case 'N':
      if (g_ascii_strcasecmp (str, "normal") == 0)
	{
	  *weight = PANGO_WEIGHT_NORMAL;
	  return TRUE;
	}
      break;
    case 'u':
    case 'U':
      if (g_ascii_strcasecmp (str, "ultralight") == 0)
	{
	  *weight = PANGO_WEIGHT_ULTRALIGHT;
	  return TRUE;
	}
      else if (g_ascii_strcasecmp (str, "ultrabold") == 0)
	{
	  *weight = PANGO_WEIGHT_ULTRABOLD;
	  return TRUE;
	}
      break;
    case '0':
    case '1':
    case '2':
    case '3':
    case '4':
    case '5':
    case '6':
    case '7':
    case '8':
    case '9':
      {
	char *end;

	*weight = strtol (str, &end, 0);
	if (*end != '\0')
	  {
	    if (warn)
	      g_warning ("Cannot parse numerical weight '%s'", str);
	    return FALSE;
	  }
	return TRUE;
      }
    }
  
  if (warn)
    g_warning ("Weight must be ultralight, light, normal, bold, ultrabold, heavy, or an integer");
  return FALSE;
}

/**
 * pango_parse_stretch:
 * @str: a string to parse.
 * @style: a #PangoStretch to store the result in.
 * @warn: if %TRUE, issue a g_warning() on bad input.
 * 
 * Parses a font stretch. The allowed values are 
 * "ultra_condensed", "extra_condensed", "condensed", 
 * "semi_condensed", "normal", "semi_expanded", "expanded", 
 * "extra_expanded" and "ultra_expanded". Case variations are 
 * ignored and the '_' characters may be omitted.
 * 
 * Return value: %TRUE if @str was successfully parsed.
 **/ 
gboolean
pango_parse_stretch (const char   *str,
		     PangoStretch *stretch,
		     gboolean	   warn)
{
  if (*str == '\0')
    return FALSE;

  switch (str[0])
    { 
    case 'c':
    case 'C':
      if (g_ascii_strcasecmp (str, "condensed") == 0)
	{
	  *stretch = PANGO_STRETCH_CONDENSED;
	  return TRUE;
	}
      break;
    case 'e':
    case 'E':
      if (g_ascii_strcasecmp (str, "extra_condensed") == 0 ||
	  g_ascii_strcasecmp (str, "extracondensed") == 0)
	{
	  *stretch = PANGO_STRETCH_EXTRA_CONDENSED;
	  return TRUE;
	}
     if (g_ascii_strcasecmp (str, "extra_expanded") == 0 ||
	 g_ascii_strcasecmp (str, "extraexpanded") == 0)
	{
	  *stretch = PANGO_STRETCH_EXTRA_EXPANDED;
	  return TRUE;
	}
      if (g_ascii_strcasecmp (str, "expanded") == 0)
	{
	  *stretch = PANGO_STRETCH_EXPANDED;
	  return TRUE;
	}
      break;
    case 'n':
    case 'N':
      if (g_ascii_strcasecmp (str, "normal") == 0)
	{
	  *stretch = PANGO_STRETCH_NORMAL;
	  return TRUE;
	}
      break;
    case 's':
    case 'S':
      if (g_ascii_strcasecmp (str, "semi_condensed") == 0 ||
	  g_ascii_strcasecmp (str, "semicondensed") == 0)
	{
	  *stretch = PANGO_STRETCH_SEMI_CONDENSED;
	  return TRUE;
	}
      if (g_ascii_strcasecmp (str, "semi_expanded") == 0 ||
	  g_ascii_strcasecmp (str, "semiexpanded") == 0)
	{
	  *stretch = PANGO_STRETCH_SEMI_EXPANDED;
	  return TRUE;
	}
      break;
    case 'u':
    case 'U':
      if (g_ascii_strcasecmp (str, "ultra_condensed") == 0 ||
	  g_ascii_strcasecmp (str, "ultracondensed") == 0)
	{
	  *stretch = PANGO_STRETCH_ULTRA_CONDENSED;
	  return TRUE;
	}
      if (g_ascii_strcasecmp (str, "ultra_expanded") == 0 ||
	  g_ascii_strcasecmp (str, "ultraexpanded") == 0)
	{
	  *stretch = PANGO_STRETCH_ULTRA_EXPANDED;
	  return TRUE;
	}
      break;
    }

  if (warn)
    g_warning ("Stretch must be ultra_condensed, extra_condensed, condensed, semi_condensed, normal, semi_expanded, expanded, extra_expanded, or ultra_expanded");
  return FALSE;
}

static const char canon_map[256] = {
   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,   0,   0,   0, 
   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,   0,   0,   0, 
   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,  '-',  0,   0, 
   0,   0,   0,   0,   0,   0,   0,   0,    0,   0,   0,   0,   0,   0,   0,   0, 
   0,  'a', 'b', 'c', 'd', 'e', 'f', 'g',  'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
  'p', 'q', 'r', 's', 't', 'u', 'v', 'w',  'x', 'y', 'z',  0,   0,   0,   0,  '-',
   0,  'a', 'b', 'c', 'd', 'e', 'f', 'g',  'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
  'p', 'q', 'r', 's', 't', 'u', 'v', 'w',  'x', 'y', 'z',  0,   0,   0,   0,   0
};
   
static gboolean
lang_equal (gconstpointer v1,
	    gconstpointer v2)
{
  const guchar *p1 = v1;
  const guchar *p2 = v2;

  while (*p2)
    {
      guchar value = canon_map[*p2];
      if (value && value != *p1++)
	return FALSE;
      p2++;
    }

  return (*p1 == '\0');
}

static guint
lang_hash (gconstpointer key)
{
  const guchar *p = key;
  guint h = 0;
  while (*p)
    {
      guchar value = canon_map[*p];
      if (value)
	h = (h << 5) - h + value;
      p++;
    }

  return h;
}

static PangoLanguage *
pango_language_copy (PangoLanguage *language)
{
  return language; /* language tags are const */
}
static void
pango_language_free (PangoLanguage *language)
{
  return; /* nothing */
}

GType
pango_language_get_type (void)
{
  static GType our_type = 0;
  
  if (our_type == 0)
    our_type = g_boxed_type_register_static ("PangoLanguage",
                                             (GBoxedCopyFunc)pango_language_copy,
                                             (GBoxedFreeFunc)pango_language_free);
  return our_type;
}

/**
 * pango_language_from_string:
 * @language: a string representing a language tag
 * 
 * Take a RFC-3066 format language tag as a string and convert it to a
 * #PangoLanguage pointer that can be efficiently copied (copy the
 * pointer) and compared with other language tags (compare the
 * pointer.)
 *
 * This function first canonicalizes the string by converting it to
 * lowercase, mapping '_' to '-', and stripping all characters other
 * than letters and '-'.
 * 
 * Return value: an opaque pointer to a #PangoLanguage structure.
 *               this will be valid forever after.
 **/
PangoLanguage *
pango_language_from_string (const char *language)
{
  static GHashTable *hash = NULL;
  char *result;
  int len;
  char *p;

  if (!hash)
    hash = g_hash_table_new (lang_hash, lang_equal);

  result = g_hash_table_lookup (hash, language);
  if (result)
    return (PangoLanguage *)result;

  len = strlen (language);
  result = g_malloc (len + 1);

  p = result;
  while (*language)
    {
      char value = canon_map[*(guchar *)language++];
      if (value)
	*(p++) = value;
    }
  *p++ = '\0';

  g_hash_table_insert (hash, result, result);

  return (PangoLanguage *)result;
}

/**
 * pango_language_matches:
 * @language: a language tag (see pango_language_from_string()),
 *            %NULL is allowed and matches nothing but '*'
 * @range_list: a list of language ranges, separated by ';' characters.
 *   each element must either be '*', or a RFC 3066 language range
 *   canonicalized as by pango_language_from_string().
 * 
 * Checks if a language tag matches one of the elements in a list of
 * language ranges. A language tag is considered to match a range
 * in the list if the range is '*', the range is exactly the tag,
 * or the range is a prefix of the tag, and the character after the
 * tag is '-'.
 *
 * Returns: %TRUE if a match was found.
 **/
gboolean
pango_language_matches (PangoLanguage *language,
			const char    *range_list)
{
  const char *lang_str = pango_language_to_string (language);
  const char *p = range_list;
  gboolean done = FALSE;

  while (!done)
    {
      const char *end = strchr (p, ';');
      if (!end)
	{
	  end = p + strlen (p);
	  done = TRUE;
	}

      if (strncmp (p, "*", 1) == 0 ||
	  (lang_str && strncmp (lang_str, p, end - p) == 0 &&
	   (lang_str[end - p] == '\0' || lang_str[end - p] == '-')))
	return TRUE;

      p = end;
    }

  return FALSE;
}

typedef struct {
  const char *lang;
  const char *str;
} LangInfo;

static int
lang_info_compare (const void *key, const void *val)
{
  const LangInfo *lang_info = val;

  return strncmp (key, lang_info->lang, 2);
}

/* The following array is supposed to contain enough text to tickle all necessary fonts for each
 * of the languages in the following. Yes, it's pretty lame. Not all of the languages
 * in the following have sufficient text to excercise all the accents for the language, and
 * there are obviously many more languages to include as well.
 */
static LangInfo lang_texts[] = {
  { "ar", "Arabic  السلام عليكم" },
  { "cs", "Czech (česky)  Dobrý den" },
  { "da", "Danish (Dansk)  Hej, Goddag" },
  { "el", "Greek (Ελληνικά) Γειά σας" },
  { "en", "English Hello" },
  { "eo", "Esperanto Saluton" },
  { "es", "Spanish (Español) ¡Hola!" },
  { "et", "Estonian  Tere, Tervist" },
  { "fi", "Finnish (Suomi)  Hei, Hyvää päivää" },
  { "fr", "French (Français)" },
  { "de", "German Grüß Gott" },
  { "iw", "Hebrew   שלום" },
  { "il", "Italiano  Ciao, Buon giorno" },
  { "ja", "Japanese (日本語) こんにちは, コンニチハ" },
  { "ko", "Korean (한글)   안녕하세요, 안녕하십니까" },
  { "mt", "Maltese   Ċaw, Saħħa" },
  { "nl", "Nederlands, Vlaams Hallo, Dag" },
  { "no", "Norwegian (Norsk) Hei, God dag" },
  { "pl", "Polish   Dzień dobry, Hej" },
  { "ru", "Russian (Русский)" },
  { "sk", "Slovak   Dobrý deň" },
  { "sv", "Swedish (Svenska) Hej på dej, Goddag" },
  { "tr", "Turkish (Türkçe) Merhaba" },
  { "zh", "Chinese (中文,普通话,汉语)" }
};

/**
 * pango_language_get_sample_string:
 * @language: a #PangoLanguage
 * 
 * Get a string that is representative of the characters needed to
 * render a particular language. This function is a bad hack for
 * internal use by renderers and Pango.
 * 
 * Return value: the sample string. This value is owned by Pango
 *   and must not be freed.
 **/
G_CONST_RETURN char *
pango_language_get_sample_string (PangoLanguage *language)
{
  const char *result;
  
  if (language)
    {
      const char *lang_str = pango_language_to_string (language);
      
      LangInfo *lang_info = bsearch (lang_str, lang_texts,
				     G_N_ELEMENTS (lang_texts), sizeof (LangInfo),
				     lang_info_compare);

      if (lang_info)
	result = lang_info->str;
      else
	result = "French (Français)";     /* Assume iso-8859-1 */
    }
  else
    {
      /* Complete junk
       */

      result = "السلام عليكم česky Ελληνικά Français 日本語 한글 Русский 中文,普通话,汉语 Türkçe";
    }

  return result;
}

#ifdef HAVE_FRIBIDI

gboolean
pango_log2vis_get_embedding_levels (gunichar       *str,
				    int             len,
				    PangoDirection *pbase_dir,
				    guint8         *embedding_level_list)
{
  FriBidiCharType fribidi_base_dir;
  gboolean result;

  fribidi_base_dir = (*pbase_dir == PANGO_DIRECTION_LTR) ? FRIBIDI_TYPE_L : FRIBIDI_TYPE_R;

  result = fribidi_log2vis_get_embedding_levels (str, len, &fribidi_base_dir,
						 embedding_level_list);
  
  *pbase_dir = (fribidi_base_dir == FRIBIDI_TYPE_L) ?  PANGO_DIRECTION_LTR : PANGO_DIRECTION_RTL;

  return result;
}


gboolean 
pango_get_mirror_char (gunichar        ch,
		       gunichar       *mirrored_ch)
{
  return fribidi_get_mirror_char (ch, mirrored_ch); 
}

#endif /* HAVE_FRIBIDI */


static guint
alias_hash (struct PangoAlias *alias)
{
  return g_str_hash (alias->alias);
}

static gboolean
alias_equal (struct PangoAlias *alias1,
	     struct PangoAlias *alias2)
{
  return g_str_equal (alias1->alias,
		      alias2->alias);
}


static void
alias_free (struct PangoAlias *alias)
{
  int i;
  g_free (alias->alias);

  for (i = 0; i < alias->n_families; i++)
    g_free (alias->families[i]);

  g_free (alias->families);
  
  g_free (alias);
}

static void
read_alias_file (const char *filename)
{
  FILE *file;
    
  GString *line_buffer;
  GString *tmp_buffer1;
  GString *tmp_buffer2;
  char *errstring = NULL;
  const char *pos;
  int line = 0;
  struct PangoAlias alias_key;
  struct PangoAlias *alias;
  char **new_families;
  int n_new;
  int i;

  file = fopen (filename, "r");
  if (!file)
    return;

  line_buffer = g_string_new (NULL);
  tmp_buffer1 = g_string_new (NULL);
  tmp_buffer2 = g_string_new (NULL);

  while (pango_read_line (file, line_buffer))
    {
      gboolean empty = FALSE;
      gboolean append = FALSE;
      line++;

      pos = line_buffer->str;
      if (!pango_skip_space (&pos))
	continue;
      
      if (!pango_scan_word (&pos, tmp_buffer1) ||
	  !pango_skip_space (&pos))
	{
	  errstring = g_strdup ("Line is not of the form KEY=VALUE or KEY+=VALUE");
	  goto error;
	}
      
      if (*pos == '+')
	{
	  append = TRUE;
	  pos++;
	}

      if (*(pos++) != '=')
	{
	  errstring = g_strdup ("Line is not of the form KEY=VALUE or KEY+=VALUE");
	  goto error;
	}
      
      if (!pango_skip_space (&pos))
	{
	  empty = TRUE;
	}
      else
	{
	  if (!pango_scan_string (&pos, tmp_buffer2))
	    {
	      errstring = g_strdup ("Error parsing value string");
	      goto error;
	    }
	  if (pango_skip_space (&pos))
	    {
	      errstring = g_strdup ("Junk after value string");
	      goto error;
	    }
	}

      alias_key.alias = g_ascii_strdown (tmp_buffer1->str, -1);
      
      /* Remove any existing values */
      alias = g_hash_table_lookup (pango_aliases_ht, &alias_key);
      
      if (!alias)
	{
	  alias = g_new0 (struct PangoAlias, 1);
	  alias->alias = alias_key.alias;
	  
	  g_hash_table_insert (pango_aliases_ht,
			       alias, alias);
	}
      else
	g_free (alias_key.alias);
	  
      new_families = g_strsplit (tmp_buffer2->str, ",", -1);
      
      n_new = 0;
      while (new_families[n_new])
	n_new++;
      
      if (alias->families && append)
	{
	  alias->families = g_realloc (alias->families,
				       sizeof (char *) *(n_new + alias->n_families));
	  for (i = 0; i < n_new; i++)
	    alias->families[alias->n_families + i] = new_families[i];
	  g_free (new_families);
	  alias->n_families += n_new;
	}
      else
	{
	  for (i = 0; i < alias->n_families; i++)
	    g_free (alias->families[i]);
	  g_free (alias->families);
	  
	  alias->families = new_families;
	  alias->n_families = n_new;
	}
    }

  if (ferror (file))
    errstring = g_strdup (g_strerror(errno));
  
 error:

  if (errstring)
    {
      fprintf (stderr, "Pango:%s:%d: %s\n", filename, line, errstring);
      g_free (errstring);
    }
      
  g_string_free (line_buffer, TRUE);
  g_string_free (tmp_buffer1, TRUE);
  g_string_free (tmp_buffer2, TRUE);

  fclose (file);
}

static void
pango_load_aliases (void)
{
  char *filename;
  const char *home;

  pango_aliases_ht = g_hash_table_new_full ((GHashFunc)alias_hash,
					    (GEqualFunc)alias_equal,
					    (GDestroyNotify)alias_free,
					    NULL);


  filename = g_strconcat (pango_get_sysconf_subdirectory (),
			  G_DIR_SEPARATOR_S "pango.aliases",
			  NULL);
  read_alias_file (filename);
  g_free (filename);
  
  home = g_get_home_dir ();
  if (home && *home)
    {
      filename = g_strconcat (home,
			      G_DIR_SEPARATOR_S ".pango.aliases",
			      NULL);
      read_alias_file (filename);
      g_free (filename);
    }
}


/**
 * pango_lookup_aliases:
 * @fontname: an ascii string
 * @families: will be set to an array of font family names.
 *    this array is owned by pango and should not be freed.
 *
 * Look up all user defined aliases for the alias #fontname.
 * The resulting font family names will be stored in #families,
 * and the number of families will be returned.
 * 
 * Return value: the number of font famillies stored in the #families argument.
 *   This value is owned by Pango and must not be freed.
 **/
void
pango_lookup_aliases (const char   *fontname,
		      char       ***families,
		      int          *n_families)
{
  struct PangoAlias alias_key;
  struct PangoAlias *alias;
  
  if (pango_aliases_ht == NULL)
    pango_load_aliases ();

  alias_key.alias = g_ascii_strdown (fontname, -1);
  alias = g_hash_table_lookup (pango_aliases_ht, &alias_key);
  g_free (alias_key.alias);

  if (alias)
    {
      *families = alias->families;
      *n_families = alias->n_families;
    }
  else
    {
      *families = NULL;
      *n_families = 0;
    }
}