summaryrefslogtreecommitdiff
path: root/Build/source/texk/xdvipdfmx/src/subfont.c
blob: 7d7927e36b56f6e61430a9fb5f50c5287a20734f (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
/*  $Header: /home/cvsroot/dvipdfmx/src/subfont.c,v 1.20 2005/07/28 13:19:00 hirata Exp $
    
    This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.

    Copyright (C) 2002 by Jin-Hwan Cho and Shunsaku Hirata,
    the dvipdfmx project team <dvipdfmx@project.ktug.or.kr>
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.
    
    This program 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
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/

#if HAVE_CONFIG_H
#include "config.h"
#endif

#include "system.h"
#include "mem.h"
#include "error.h"
#include "dpxfile.h"

#include "subfont.h"

static int verbose = 0;
void
subfont_set_verbose (void)
{
  verbose++;
}

/* Don't forget fontmap reading now requires information
 * from SFD files. You must initialize at least sfd_file_
 * cache before starting loading of fontmaps.
 */

/* Subfont Definition File:
 *  struct sfd_file_ is for storing subfont identifiers
 *  contained in a SFD file and for mapping string pair
 *  <SFD_file, Subfont_id> to internal code mapping table
 *  ID which is index within an array of struct sfd_rec_.
 *  We store code mapping tables in different place than
 *  struct sfd_file_.
 */
struct sfd_file_
{
  char  *ident;  /* SFD file name */
  char **sub_id; /* Subfont IDs   */

  int   *rec_id; /* indices within struct sfd_rec_ array "sfd_record" */

  int    max_subfonts;
  int    num_subfonts;
};

/* Mapping table */
struct sfd_rec_
{
  /* unsigned char  misbit[32]; */
  unsigned short vector[256]; /* 0 for undefined */
};

static void
init_sfd_file_ (struct sfd_file_ *sfd)
{
  sfd->ident  = NULL;
  sfd->sub_id = NULL;
  sfd->rec_id = NULL;
  sfd->max_subfonts = sfd->num_subfonts = 0;
}

static void
clean_sfd_file_ (struct sfd_file_ *sfd)
{
  int  i;
  if (sfd->ident)
    RELEASE(sfd->ident);
  if (sfd->sub_id) {
    for (i = 0; i < sfd->num_subfonts; i++) {
      if (sfd->sub_id[i])
        RELEASE(sfd->sub_id[i]);
    }
    RELEASE(sfd->sub_id);
  }
  if (sfd->rec_id)
    RELEASE(sfd->rec_id);
  init_sfd_file_(sfd);
}

static struct sfd_file_ *sfd_files = NULL;
static int num_sfd_files = 0, max_sfd_files = 0;

static struct sfd_rec_ *sfd_record = NULL;
static int num_sfd_records = 0, max_sfd_records = 0;



/* Another buffer...
 * We want buffer size at least 7 x 256 + a
 * 4096 is usually enough.
 */
#define LINE_BUF_SIZE 4096
static char line_buf[LINE_BUF_SIZE];

/* Each lines describes character code mapping for each
 * subfonts. '#' is start of comment.
 * SFD file format uses a '\' before newline sequence
 * for line-continuation.
 */
static char *
readline (char *buf, int buf_len, FILE *fp)
{
  char  *r, *q, *p = buf;
  int    n = 0, c = 0;

  while (buf_len - n > 0 && (q = mfgets(p, buf_len - n, fp))) {
    c++;
    r = strchr(q, '#');
    /* Comment is converted to single wsp (followed by a newline). */
    if (r) {
      *r = ' ';
      *(r + 1) = '\0';
    }
    if (strlen(q) == 0)
      break; /* empty line */
    n += strlen(q);
    q += strlen(q) - 1;
    if (*q != '\\')
      break;
    else { /* line continued */
      n -= 1;
      p  = buf + n;
    }
  }
  if (n >= buf_len - 1) {
    WARN("Possible buffer overflow in reading SFD file (buffer full, size=%d bytes)",
         buf_len - 1);
  }

  return  (c > 0 ? buf : NULL);
}

#define clear_vector(v) if ((v)) { \
  int __i; \
  for (__i = 0; __i < 256; __i++) \
    (v)[__i] = 0; \
}

/* subfont_id ( integer ':' | integer '_' integer | integer )*
 *
 *  0x32: ==> Subsequent integers are place into slots starting at 0x32.
 *    0x32: 0xA1A1 0xA1A2 ... ==> 0x32 is mappned to 0xA1A1, 0x33 to 0xA1A2
 *  0xA1A1_0xA1A5 ==> Expanded to 0xA1A1 0xA1A2 ... 0xA1A5
 */

/* subfont_id is already consumed here. */
static int
read_sfd_record (struct sfd_rec_ *rec, const char *lbuf)
{
  char  *p = (char *) lbuf, *q;
  int    repos  = 0;
  long   c,  v1 = 0, v2 = 0;
  int    curpos = 0;
  int    error  = 0;

#define IS_TOKSEP(c) ((c) == '\0' || isspace((c)))
  for ( ; *p && isspace(*p); p++);
  while (!error && *p) {
    repos = 0; q = p;
    v1    = strtol(p, &q, 0);
    if (q == p ||
        (!IS_TOKSEP(*q) && *q != ':' && *q != '_')) {
      WARN("Unknown token in subfont mapping table: %c", *q);
      return  -1;
    }

    switch (*q) {
    case  ':':
      if (v1 < 0 || v1 > 0xff) {
        WARN("Invalud value for subfont table offset: %ld", v1);
        return  -1;
      }
      repos = 1;
      q++;
      break;
    case  '_':
      p  = q + 1;
      v2 = strtol(p, &q, 0);
      if (v1 < 0 || v1 > 0xffffL ||
          v2 < 0 || v2 > 0xffffL) {
        WARN("Invalid value in subfont mapping table: 0x%x_0x%x", v1, v2);
        return -1;
      } else if (q == p || !IS_TOKSEP(*q)) {
        WARN("Invalid char in subfont mapping table: %c", *q);
        return  -1;
      }
      break;
    default:
      if (v1 < 0 || v1 > 0xffffL) {
        WARN("Invalid character code in subfont mapping table: 0x%x", v1);
        return -1;
      }
      v2 = v1;
      break;
    }

    if (repos)
      curpos = v1;
    else {
      if (v2 < v1 || curpos + (v2 - v1) > 0xff) {
        WARN("Invalid range in subfont mapping: curpos=\"0x%02x\" range=\"0x%04x,0x%04x\"",
             curpos, v1, v2);
        return  -1;
      }
      for (c = v1; c <= v2; c++) {
        if (rec->vector[curpos] != 0) {
          WARN("Subfont mapping for slot=\"0x%02x\" already defined...", curpos);
          return  -1;
        }
        ASSERT( curpos >= 0 && curpos <= 255 );
        rec->vector[curpos++] = (unsigned short) c;
      }
    }
    for (p = q; *p && isspace(*p); p++);
  }

  return  error;
}

/* Scan for subfont IDs */
static int
scan_sfd_file (struct sfd_file_ *sfd, FILE *fp)
{
  char  *id;
  char  *q, *p;
  int    n, lpos = 0;

  ASSERT( sfd && fp );

  if (verbose > 3) {
    MESG("\nsubfont>> Scanning SFD file \"%s\"...\n", sfd->ident);
  }

  rewind(fp);
  sfd->max_subfonts = sfd->num_subfonts = 0;
  while ((p = readline(line_buf, LINE_BUF_SIZE, fp)) != NULL) {
    lpos++;
    for ( ; *p && isspace(*p); p++);
    if (*p == 0)
      continue; /* empty */

    /* Saw non-wsp here */
    for (n = 0, q = p; *p && !isspace(*p); p++, n++);
    id = NEW(n + 1, char);
    memcpy(id, q, n); id[n] = '\0';
    if (sfd->num_subfonts >= sfd->max_subfonts) {
      sfd->max_subfonts += 16;
      sfd->sub_id = RENEW(sfd->sub_id, sfd->max_subfonts, char *);
    }

    if (verbose > 3) {
      MESG("subfont>>   id=\"%s\" at line=\"%d\"\n", id, lpos);
    }
    sfd->sub_id[sfd->num_subfonts] = id;
    sfd->num_subfonts++;
  }

  sfd->rec_id = NEW(sfd->num_subfonts, int);
  for (n = 0; n < sfd->num_subfonts; n++) {
    sfd->rec_id[n] = -1; /* Not loaded yet. We do lazy loading of map definitions. */
  }

  if (verbose > 3) {
    MESG("subfont>> %d entries found in SFD file \"%s\".\n", sfd->num_subfonts, sfd->ident);
  }

  return  0;
}


/* Open SFD file and gather subfont IDs. We do not read mapping tables
 * here but only read subfont IDs used in SFD file.
 */
static int
find_sfd_file (const char *sfd_name)
{
  int    id = -1;
  int    i, error = -1;

  /* Check if we already opened SFD file */
  for (i = 0; i < num_sfd_files; i++) {
    if (!strcmp(sfd_files[i].ident, sfd_name)) {
      id = i;
      break;
    }
  }

  if (id < 0) {
    struct sfd_file_ *sfd = NULL;
    FILE  *fp;

    if (num_sfd_files >= max_sfd_files) {
      max_sfd_files += 8;
      sfd_files = RENEW(sfd_files, max_sfd_files, struct sfd_file_);
    }
    sfd = &sfd_files[num_sfd_files];
    init_sfd_file_(sfd);
    sfd->ident = NEW(strlen(sfd_name) + 1, char);
    strcpy(sfd->ident, sfd_name);
    fp = DPXFOPEN(sfd->ident, DPX_RES_TYPE_SFD);
    if (!fp) {
      clean_sfd_file_(sfd);
      return  -1;
    }
    error = scan_sfd_file(sfd, fp);
    DPXFCLOSE(fp);
    if (!error)
      id = num_sfd_files++;
    else {
      WARN("Error occured while reading SFD file \"%s\"", sfd_name);
      clean_sfd_file_(sfd);
      id = -1;
    }
  }

  return  id;
}

char **
sfd_get_subfont_ids (const char *sfd_name, int *num_ids)
{
  int  sfd_id;

  if (!sfd_name)
    return  NULL;

  sfd_id = find_sfd_file(sfd_name);
  if (sfd_id < 0)
    return  NULL;

  if (num_ids)
    *num_ids = sfd_files[sfd_id].num_subfonts;
  return  sfd_files[sfd_id].sub_id;
}

/* Make sure that sfd_name does not have the extension '.sfd'.
 * Mapping tables are actually read here.
 */
int
sfd_load_record (const char *sfd_name, const char *subfont_id)
{
  int               rec_id = -1;
  struct sfd_file_ *sfd;
  FILE             *fp;
  int               sfd_id, i, error = 0;
  char             *p, *q;

  if (!sfd_name || !subfont_id)
    return  -1;

  sfd_id = find_sfd_file(sfd_name);
  if (sfd_id < 0)
    return  -1;

  sfd = &sfd_files[sfd_id];
  /* Check if we already loaded mapping table. */
  for (i = 0;
       i < sfd->num_subfonts && strcmp(sfd->sub_id[i], subfont_id); i++);
  if (i == sfd->num_subfonts) {
    WARN("Subfont id=\"%s\" not exist in SFD file \"%s\"...",
         subfont_id, sfd->ident);
    return  -1;
  } else if (sfd->rec_id[i] >= 0) {
    return  sfd->rec_id[i];
  }

  if (verbose > 3) {
    MESG("\nsubfont>> Loading SFD mapping table for <%s,%s>...",
         sfd->ident, subfont_id);
  }

  /* reopen */
  fp = DPXFOPEN(sfd->ident, DPX_RES_TYPE_SFD);
  if (!fp) {
    return  -1;
    /* ERROR("Could not open SFD file \"%s\"", sfd_name); */
  }

  /* Seek to record for 'sub_name'. */
  while ((p = readline(line_buf, LINE_BUF_SIZE, fp))) {
    for ( ; *p && isspace(*p); p++);
    if (*p == 0)
      continue; /* empty line */

    /* q = parse_ident(&p, p + strlen(p)); */
    for (q = p; *p && !isspace(*p); p++);
    *p = '\0'; p++;
    if (!strcmp(q, subfont_id)) {
      if (num_sfd_records >= max_sfd_records) {
        max_sfd_records += 16;
        sfd_record = RENEW(sfd_record, max_sfd_records, struct sfd_rec_);
      }
      clear_vector(sfd_record[num_sfd_records].vector);
      error = read_sfd_record(&sfd_record[num_sfd_records], p);
      if (error)
        WARN("Error occured while reading SFD file: file=\"%s\" subfont_id=\"%s\"",
             sfd->ident, subfont_id);
      else {
        rec_id = num_sfd_records++;
      }
    }
  }
  if (rec_id < 0) {
    WARN("Failed to load subfont mapping table for SFD=\"%s\" subfont_id=\"%s\"",
         sfd->ident, subfont_id);
  }
  sfd->rec_id[i] = rec_id;
  DPXFCLOSE(fp);

  if (verbose > 3) {
    int __i;
    if (rec_id >= 0) {
      MESG(" at id=\"%d\"", rec_id);
      MESG("\nsubfont>> Content of mapping table:");
      for (__i = 0; __i < 256; __i++) {
        if (__i % 16 == 0)
          MESG("\nsubfont>>  ");
        MESG(" %04x", sfd_record[rec_id].vector[__i]);
      }
    }
    MESG("\n");
  }

  return  rec_id;
}


/* Lookup mapping table */
unsigned short
lookup_sfd_record (int rec_id, unsigned char c)
{
  if (!sfd_record ||
       rec_id < 0 || rec_id >= num_sfd_records)
    ERROR("Invalid subfont_id: %d", rec_id);
  return sfd_record[rec_id].vector[c];
}

#if  0
static void
release_sfd_record (void)
{
  int  i;

  if (sfd_record) {
    RELEASE(sfd_record);
  }
  if (sfd_files) {
    for (i = 0; i < num_sfd_files; i++) {
      clean_sfd_file_(&sfd_files[i]);
    }
    RELEASE(sfd_files);
  }
  sfd_record = NULL;
  sfd_files  = NULL;
  num_sfd_records = max_sfd_records = 0;
  num_sfd_files = max_sfd_files = 0;
}
#endif /* 0 */


#if  DPXTEST
/* SFD file dumper */
#ifdef HAVE_ICONV
#include <iconv.h>
#else
typedef int iconv_t;
#endif
#include <string.h>

static void
dump_table (const char *sfd_name, const char *sub_name, iconv_t cd)
{
  int  rec_id, i;

  rec_id = sfd_load_record(sfd_name, sub_name);
  if (rec_id < 0) {
    WARN("Could not load SFD mapping for \"%s\"", sub_name);
    return;
  }
  fprintf(stdout, "  <subfont id=\"%s\">\n", sub_name);
  for (i = 0; i < 256; i++) {
    unsigned short c = lookup_sfd_record(rec_id, i);
    char    *p, inbuf[2];
    char    *q, outbuf[32];
    size_t   r, inbufleft = 2, outbufleft = 32;

    if (c == 0)
      fprintf(stdout, "    <!-- %02x: undefined -->", i);
    else {
      fprintf(stdout, "    <a bi=\"%02x\" bo=\"%02x %02x\"", i, (c >> 8) & 0xff, c & 0xff);
      if (cd != (iconv_t) -1) {
        p = inbuf; q = outbuf;
        inbuf[0] = (c >> 8) & 0xff;
        inbuf[1] = c & 0xff;
#ifdef HAVE_ICONV
        r = iconv(cd, &p, &inbufleft, &q, &outbufleft);
        if (r == -1) {
          if (verbose) {
            WARN("Conversion to Unicode failed for subfont-id=\"%s\" code=\"0x%02x\"",
                 sub_name, i);
            WARN(">> with: %s", strerror(errno));
          }
        } else {
          outbuf[32-outbufleft] = 0;
          fprintf(stdout, " uc=\"%s\"", outbuf);
        }
#endif /* HAVE_ICONV */
      }
      fprintf(stdout, " />");
    }
    fprintf(stdout, "\n");
  }
  fprintf(stdout, "  </subfont>\n");
  return;
}

#define subfontDefinition_DTD "\
<!ELEMENT subfontDefinition (subfont+)>\n\
<!ATTLIST subfontDefinition\n\
  id CDATA #REQUIRED\n\
  output-encoding CDATA #IMPLIED\n\
>\n\
<!ELEMENT subfont (a*)>\n\
<!ATTLIST subfont\n\
  id CDATA #REQUIRED\n\
>\n\
<!ELEMENT a EMPTY>\n\
<!ATTLIST a\n\
  bi NMTOKENS #REQUIRED\n\
  bo NMTOKENS #REQUIRED\n\
  uc CDATA #IMPLIED\n\
>\
"

void
test_subfont_help (void)
{
  fprintf(stdout, "usage: subfont [options] SFD_name\n");
  fprintf(stdout, "-e, --encoding string\n");
  fprintf(stdout, "  Target (output) encoding of SFD mapping is 'string'.\n");
  fprintf(stdout, "  It must be an encoding name recognized by iconv.\n");
  fprintf(stdout, "  With this option write Unicode character in auxiliary attribute 'uc'.\n");
  fprintf(stdout, "-s, --subfont-id string\n");
  fprintf(stdout, "  Load and dump mapping table only for subfont 'string'.\n");
}

int
test_subfont_main (int argc, char *argv[])
{
  char   *sfd_name = NULL, *sub_name = NULL;
  char   *from = NULL;
  int     i;
  iconv_t cd = (iconv_t) -1;

  for (;;) {
    int  c, optidx = 0;
    static struct option long_options[] = {
      {"encoding",   1, 0, 'e'}, /* for to-Unicode conversion */
      {"subfont-id", 1, 0, 's'},
      {"help",       0, 0, 'h'},
      {0, 0, 0, 0}
    };
    c = getopt_long(argc, argv, "e:s:h", long_options, &optidx);
    if (c == -1)
      break;

    switch (c) {
    case  'e':
      from = optarg;
      break;
    case  's':
      sub_name = optarg;
      break;
    case  'h':
      test_subfont_help();
      return  0;
      break;
    default:
      test_subfont_help();
      return  -1;
      break;
    }
  }
  if (optind < argc) {
    sfd_name = argv[optind++];
  }

  if (sfd_name == NULL) {
    WARN("No SFD file name specified.");
    test_subfont_help();
    return  -1;
  }
  if (!from)
    cd = (iconv_t) -1;
  else {
#ifdef HAVE_ICONV
    cd = iconv_open("utf-8", from);
    if (cd == (iconv_t) -1) {
      WARN("Can't open iconv conversion descriptor for %s --> utf-8", from);
      return  -1;
    }
#else
    WARN("Your system doesn't have iconv() in libc!");
#endif
  }

  fprintf(stdout, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
  fprintf(stdout, "<!DOCTYPE subfontDefinition [\n%s\n]>\n",
          subfontDefinition_DTD);
  fprintf(stdout, "<subfontDefinition id=\"%s\" output-encoding=\"%s\">\n",
          sfd_name, from ? from : "unknown");
  if (sub_name == NULL || !strcmp(sub_name, "all")) {
    char **sub_id;
    int    num_ids = 0;
    sub_id = sfd_get_subfont_ids(sfd_name, &num_ids);
    if (!sub_id)
      WARN("Could not open SFD file: %s", sfd_name);
    else {
      for (i = 0; i < num_ids; i++)
        dump_table(sfd_name, sub_id[i], cd);
    }
  } else {
    dump_table(sfd_name, sub_name, cd);
  }
  fprintf(stdout, "</subfontDefinition>\n");

#ifdef HAVE_ICONV
  if (cd != (iconv_t) -1)
    iconv_close(cd);
#endif

  return  0;
}

#endif  /* DPXTEST */