File: mapfile.w

package info (click to toggle)
texlive-bin 2018.20181218.49446-1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 186,920 kB
  • sloc: ansic: 873,264; cpp: 311,278; perl: 82,918; sh: 23,243; makefile: 8,590; lex: 4,939; python: 4,462; pascal: 3,813; java: 3,569; yacc: 2,901; tcl: 2,379; exp: 2,031; xml: 844; ruby: 678; lisp: 398; sed: 331; asm: 140; csh: 46; awk: 30
file content (715 lines) | stat: -rw-r--r-- 23,001 bytes parent folder | download | duplicates (2)
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
% mapfile.w
%
% Copyright 1996-2006 Han The Thanh <thanh@@pdftex.org>
% Copyright 2006-2010 Taco Hoekwater <taco@@luatex.org>
%
% This file is part of LuaTeX.
%
% LuaTeX 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.
%
% LuaTeX 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 Lesser General Public
% License for more details.
%
% You should have received a copy of the GNU General Public License along
% with LuaTeX; if not, see <http://www.gnu.org/licenses/>.

@ @c


#include "ptexlib.h"
#include <math.h>
#include <kpathsea/c-auto.h>
#include <kpathsea/c-memstr.h>
#include <string.h>

#define FM_BUF_SIZE     1024

static FILE *fm_file;

static unsigned char *fm_buffer = NULL;
static int fm_size = 0;
static int fm_curbyte = 0;

#define fm_open(a)      (fm_file = fopen((char *)(a), FOPEN_RBIN_MODE))
#define fm_read_file()  readbinfile(fm_file,&fm_buffer,&fm_size)
#define fm_close()      xfclose(fm_file, cur_file_name)
#define fm_getchar()    fm_buffer[fm_curbyte++]
#define fm_eof()        (fm_curbyte>fm_size)
#define is_cfg_comment(c) \
    (c == 10 || c == '*' || c == '#' || c == ';' || c == '%')

typedef enum { FM_DUPIGNORE, FM_REPLACE, FM_DELETE } updatemode;

typedef struct mitem {
    updatemode mode;            /* FM_DUPIGNORE or FM_REPLACE or FM_DELETE */
    maptype type;               /* map file or map line */
    char *line;                 /* pointer to map file name or map line */
    int lineno;                 /* line number in map file */
} mapitem;
mapitem *mitem = NULL;

#define read_field(r, q, buf) do {  \
    q = buf;                        \
    while (*r != ' ' && *r != '<' && *r != '"' && *r != '\0') \
        *q++ = *r++;                \
    *q = '\0';                      \
    skip_char(r, ' ');                  \
} while (0)

#define set_field(F) do {           \
    if (q > buf)                    \
        fm->F = xstrdup(buf);       \
    if (*r == '\0')                 \
        goto done;                  \
} while (0)

fm_entry *new_fm_entry(void)
{
    fm_entry *fm;
    fm = xtalloc(1, fm_entry);
    fm->tfm_name = NULL;
    fm->ps_name = NULL;
    fm->fd_flags = FD_FLAGS_NOT_SET_IN_MAPLINE;
    fm->ff_name = NULL;
    fm->encname = NULL;
    fm->type = 0;
    fm->slant = 0;
    fm->extend = 1000;
    unset_slantset(fm);
    unset_extendset(fm);
    unset_inuse(fm);
    return fm;
}

void delete_fm_entry(fm_entry * fm)
{
    xfree(fm->tfm_name);
    xfree(fm->ps_name);
    xfree(fm->ff_name);
    xfree(fm);
}

static ff_entry *new_ff_entry(void)
{
    ff_entry *ff;
    ff = xtalloc(1, ff_entry);
    ff->ff_name = NULL;
    ff->ff_path = NULL;
    return ff;
}

static void delete_ff_entry(ff_entry * ff)
{
    xfree(ff->ff_name);
    xfree(ff->ff_path);
    xfree(ff);
}

/**********************************************************************/

static struct avl_table *tfm_tree = NULL;
static struct avl_table *ff_tree = NULL;
static struct avl_table *encname_tree = NULL;

/* AVL sort fm_entry into tfm_tree by tfm_name */

static int comp_fm_entry_tfm(const void *pa, const void *pb, void *p)
{
    (void) p;
    return strcmp(((const fm_entry *) pa)->tfm_name,
                  ((const fm_entry *) pb)->tfm_name);
}

/* AVL sort ff_entry into ff_tree by ff_name */

static int comp_ff_entry(const void *pa, const void *pb, void *p)
{
    (void) p;
    return strcmp(((const ff_entry *) pa)->ff_name,
                  ((const ff_entry *) pb)->ff_name);
}

static void create_avl_trees(void)
{
    assert(tfm_tree == NULL);
    tfm_tree = avl_create(comp_fm_entry_tfm, NULL, &avl_xallocator);
    assert(tfm_tree != NULL);
    assert(ff_tree == NULL);
    ff_tree = avl_create(comp_ff_entry, NULL, &avl_xallocator);
    assert(ff_tree != NULL);
    assert(encname_tree == NULL);
    encname_tree = avl_create(comp_string_entry, NULL, &avl_xallocator);
    assert(encname_tree != NULL);
}

int avl_do_entry(fm_entry * fm, int mode)
{
    fm_entry *p;
    void *a;
    void **aa;
    int delete_new = 0;
    if (tfm_tree == NULL)
        create_avl_trees();
    p = (fm_entry *) avl_find(tfm_tree, fm);
    if (p != NULL) {
        switch (mode) {
        case FM_DUPIGNORE:
            formatted_warning("map file", "entry for '%s' already exists, duplicates ignored", fm->tfm_name);
            delete_new = 1;
            break;
        case FM_REPLACE:
        case FM_DELETE:
            if (is_inuse(p)) {
                formatted_warning("map file", "entry for '%s' has been used, replace/delete not allowed", fm->tfm_name);
                delete_new = 1;
            } else {
                a = avl_delete(tfm_tree, p);
                assert(a != NULL);
                delete_fm_entry(p);
            }
            break;
        default:
            assert(0);
        }
    }
    if ((mode == FM_DUPIGNORE || mode == FM_REPLACE) && delete_new == 0) {
        aa = avl_probe(tfm_tree, fm);
        assert(aa != NULL);
    } else
        delete_new = 1;
    return delete_new;
}

/* add the encoding name to an AVL tree. this has nothing to do with writeenc.c */

static char *add_encname(char *s)
{
    char *p;
    void **aa;
    assert(s != NULL);
    assert(encname_tree != NULL);
    if ((p = (char *) avl_find(encname_tree, s)) == NULL) {     /* encoding name not yet registered */
        p = xstrdup(s);
        aa = avl_probe(encname_tree, p);
        assert(aa != NULL);
    }
    return p;
}

/**********************************************************************/
/* consistency check for map entry, with warn flag */

static int check_fm_entry(fm_entry * fm, boolean warn)
{
    int a = 0;
    assert(fm != NULL);

    if (is_fontfile(fm) && !is_included(fm)) {
        if (warn)
            formatted_warning("map file",
                 "ambiguous entry for '%s': font file present but not included, "
                 "will be treated as font file not present", fm->tfm_name);
        xfree(fm->ff_name);
        /* do not set variable |a| as this entry will be still accepted */
    }

    /* if both ps_name and font file are missing, drop this entry */
    if (fm->ps_name == NULL && !is_fontfile(fm)) {
        if (warn)
            formatted_warning("map file", "invalid entry for '%s': both ps_name and font file missing", fm->tfm_name);
        a += 1;
    }

    /* TrueType fonts cannot be reencoded without subsetting */
    if (is_truetype(fm) && is_reencoded(fm) && !is_subsetted(fm)) {
        if (warn)
            formatted_warning("map file", "invalid entry for '%s': only subsetted TrueType font can be reencoded", fm->tfm_name);
        a += 2;
    }

    /* the value of SlantFont and ExtendFont must be reasonable */
    if (fm->slant < FONT_SLANT_MIN || fm->slant > FONT_SLANT_MAX) {
        if (warn)
            formatted_warning("map file", "invalid entry for '%s': value '%g' is to large for SlantFont",
                 fm->tfm_name, fm->slant / 1000.0);
        a += 8;
    }
    if (fm->extend < FONT_EXTEND_MIN || fm->extend > FONT_EXTEND_MAX) {
        if (warn)
            formatted_warning("map file", "invalid entry for '%s': value '%g' is too large for ExtendFont",
                 fm->tfm_name, fm->extend / 1000.0);
        a += 16;
    }

    return a;
}

/**********************************************************************/
/* returns the font number if s is one of the 14 std. font names, -1 otherwise; speed-trimmed. */

int check_std_t1font(char *s)
{
    static const char *std_t1font_names[] = {
        "Courier",              /* 0:7 */
        "Courier-Bold",         /* 1:12 */
        "Courier-Oblique",      /* 2:15 */
        "Courier-BoldOblique",  /* 3:19 */
        "Helvetica",            /* 4:9 */
        "Helvetica-Bold",       /* 5:14 */
        "Helvetica-Oblique",    /* 6:17 */
        "Helvetica-BoldOblique",        /* 7:21 */
        "Symbol",               /* 8:6 */
        "Times-Roman",          /* 9:11 */
        "Times-Bold",           /* 10:10 */
        "Times-Italic",         /* 11:12 */
        "Times-BoldItalic",     /* 12:16 */
        "ZapfDingbats"          /* 13:12 */
    };
    static const int index[] =
        { -1, -1, -1, -1, -1, -1, 8, 0, -1, 4, 10, 9, -1, -1, 5, 2, 12, 6, -1,
        3, -1, 7
    };
    size_t n;
    int k = -1;
    assert(s != NULL);
    n = strlen(s);
    if (n > 21)
        return -1;
    if (n == 12) {              /* three names have length 12 */
        switch (*s) {
        case 'C':
            k = 1;              /* Courier-Bold */
            break;
        case 'T':
            k = 11;             /* Times-Italic */
            break;
        case 'Z':
            k = 13;             /* ZapfDingbats */
            break;
        default:
            return -1;
        }
    } else
        k = index[n];
    if (k > -1 && !strcmp(std_t1font_names[k], s))
        return k;
    return -1;
}

/**********************************************************************/

static void fm_scan_line(void)
{
    int a, b, c, j, u = 0, v = 0;
    char cc;
    float d;
    fm_entry *fm;
    char fm_line[FM_BUF_SIZE], buf[FM_BUF_SIZE];
    char *p, *q, *s;
    char *r = NULL;
    switch (mitem->type) {
    case MAPFILE:
        p = fm_line;
        while (!fm_eof()) {
            if (fm_curbyte == fm_size) {
                fm_curbyte++;
                cc = 10;
            } else {
                cc = (char) fm_getchar();
            }
            append_char_to_buf(cc, p, fm_line, FM_BUF_SIZE);
            if (cc == 10)
                break;
        }
        *(--p) = '\0';
        r = fm_line;
        break;
    case MAPLINE:
        r = mitem->line;        /* work on string from makecstring() */
        break;
    default:
        assert(0);
    }
    if (*r == '\0' || is_cfg_comment(*r))
        return;
    fm = new_fm_entry();
    read_field(r, q, buf);
    set_field(tfm_name);
    if (!isdigit((unsigned char)*r)) {         /* 2nd field ps_name may not start with a digit */
        read_field(r, q, buf);
        set_field(ps_name);
    }
    if (isdigit((unsigned char)*r)) {          /* font descriptor /Flags given? */
        for (s = r; isdigit((unsigned char)*s); s++);
        if (*s == ' ' || *s == '"' || *s == '<' || *s == '\0') {        /* not e. g. 8r.enc */
            fm->fd_flags = atoi(r);
            while (isdigit((unsigned char)*r))
                r++;
        }
    }
    while (1) {                 /* loop through "specials", encoding, font file */
        skip_char(r, ' ');
        switch (*r) {
        case '\0':
            goto done;
        case '"':              /* opening quote */
            r++;
            u = v = 0;
            do {
                skip_char(r, ' ');
                if (sscanf(r, "%f %n", &d, &j) > 0) {
                    s = r + j;  /* jump behind number, eat also blanks, if any */
                    if (*(s - 1) == 'E' || *(s - 1) == 'e')
                        s--;    /* e. g. 0.5ExtendFont: %f = 0.5E */
                    if (str_prefix(s, "SlantFont")) {
                        d *= (float) 1000.0;    /* correct rounding also for neg. numbers */
                        fm->slant = (int) (d > 0 ? d + 0.5 : d - 0.5);
                        set_slantset(fm);
                        r = s + strlen("SlantFont");
                    } else if (str_prefix(s, "ExtendFont")) {
                        d *= (float) 1000.0;
                        fm->extend = (int) (d > 0 ? d + 0.5 : d - 0.5);
                        set_extendset(fm);
                        r = s + strlen("ExtendFont");
                    } else {    /* unknown name */
                        for (r = s; *r != ' ' && *r != '"' && *r != '\0'; r++); /* jump over name */
                        c = *r; /* remember char for temporary end of string */
                        *r = '\0';
                        formatted_warning("map file", "invalid entry for '%s': unknown name '%s' ignored", fm->tfm_name, s);
                        *r = (char) c;
                    }
                } else
                    for (; *r != ' ' && *r != '"' && *r != '\0'; r++);
            }
            while (*r == ' ');
            if (*r == '"')      /* closing quote */
                r++;
            else {
                formatted_warning("map file", "invalid entry for '%s': closing quote missing", fm->tfm_name);
                goto bad_line;
            }
            break;
        case 'P':              /* handle cases for sub fonts like 'PidEid=3,1' */
            formatted_warning("map file", "invalid entry for '%s': subfonts are not supported", fm->tfm_name);
            goto bad_line;
            break;
        default:               /* encoding or font file specification */
            a = b = 0;
            if (*r == '<') {
                a = *r++;
                if (*r == '<' || *r == '[')
                    b = *r++;
            }
            read_field(r, q, buf);
            /* encoding, formats: '8r.enc' or '<8r.enc' or '<[8r.enc' */
            if (strlen(buf) > 4 && strcasecmp(strend(buf) - 4, ".enc") == 0) {
                fm->encname = add_encname(buf);
                u = v = 0;      /* u, v used if intervening blank: "<< foo" */
            } else if (strlen(buf) > 0) {       /* file name given */
                /* font file, formats:
                 * subsetting:    '<cmr10.pfa'
                 * no subsetting: '<<cmr10.pfa'
                 * no embedding:  'cmr10.pfa'
                 */
                if (a == '<' || u == '<') {
                    set_included(fm);
                    if ((a == '<' && b == 0) || (a == 0 && v == 0))
                        set_subsetted(fm);
                    /* otherwise b == '<' (or '[') => no subsetting */
                }
                set_field(ff_name);
                u = v = 0;
            } else {
                u = a;
                v = b;
            }
        }
    }
  done:
    if (fm->ps_name != NULL && (check_std_t1font(fm->ps_name) >= 0))
        set_std_t1font(fm);
    if (is_fontfile(fm) && strlen(fm_fontfile(fm)) > 3) {
        if (strcasecmp(strend(fm_fontfile(fm)) - 4, ".ttf") == 0)
            set_truetype(fm);
        else if (strcasecmp(strend(fm_fontfile(fm)) - 4, ".ttc") == 0)
            set_truetype(fm);
        else if (strcasecmp(strend(fm_fontfile(fm)) - 4, ".otf") == 0)
            set_opentype(fm);
        else
            set_type1(fm);
    } else
        set_type1(fm);          /* assume a builtin font is Type1 */
    if (check_fm_entry(fm, true) != 0)
        goto bad_line;
    /*
       Until here the map line has been completely scanned without errors;
       fm points to a valid, freshly filled-out fm_entry structure.
       Now follows the actual work of registering/deleting.
     */
    if (avl_do_entry(fm, mitem->mode) == 0)
        return;
  bad_line:
    delete_fm_entry(fm);
}

/**********************************************************************/

static void fm_read_info(void)
{
    int callback_id;
    int file_opened = 0;

    if (tfm_tree == NULL)
        create_avl_trees();
    if (mitem->line == NULL)    /* nothing to do */
        return;
    mitem->lineno = 1;
    switch (mitem->type) {
    case MAPFILE:
        xfree(fm_buffer);
        fm_curbyte = 0;
        fm_size = 0;
        cur_file_name = luatex_find_file(mitem->line, find_map_file_callback);
        if (cur_file_name) {
            callback_id = callback_defined(read_map_file_callback);
            if (callback_id > 0) {
                if (run_callback(callback_id, "S->bSd", cur_file_name,
                                 &file_opened, &fm_buffer, &fm_size)) {
                    if (file_opened) {
                        if (fm_size > 0) {
                            report_start_file(filetype_map,cur_file_name);
                            while (!fm_eof()) {
                                fm_scan_line();
                                mitem->lineno++;
                            }
                            report_stop_file(filetype_map);
                            fm_file = NULL;
                        }
                    } else {
                        formatted_warning("map file", "cannot open font map file '%s'", cur_file_name);
                    }
                } else {
                    formatted_warning("map file", "cannot open font map file '%s'", cur_file_name);
                }
            } else {
                if (!fm_open(cur_file_name)) {
                    formatted_warning("map file", "cannot open font map file '%s'", cur_file_name);
                } else {
                    fm_read_file();
                    report_start_file(filetype_map,cur_file_name);
                    while (!fm_eof()) {
                        fm_scan_line();
                        mitem->lineno++;
                    }
                    fm_close();
                    report_stop_file(filetype_map);
                    fm_file = NULL;
                }
            }
            cur_file_name = NULL;
        }
        break;
    case MAPLINE:
        cur_file_name = NULL;
        fm_scan_line();
        break;
    default:
        assert(0);
    }
    mitem->line = NULL;         /* done with this line */
    cur_file_name = NULL;
    return;
}

/**********************************************************************/

fm_entry *getfontmap(char *tfm_name)
{
    fm_entry *fm;
    fm_entry tmp;
    if (tfm_name == NULL)       /* wide, lua loaded fonts may not have a name */
        return NULL;
    if (tfm_tree == NULL)
        fm_read_info();         /* only to read default map file */
    tmp.tfm_name = tfm_name;    /* Look up for tfmname */
    fm = (fm_entry *) avl_find(tfm_tree, &tmp);
    if (fm == NULL)
        return NULL;
    set_inuse(fm);
    return fm;
}

/**********************************************************************/
/*
 * Process map file given by its name or map line contents. Items not
 * beginning with [+-=] flush default map file, if it has not yet been
 * read. Leading blanks and blanks immediately following [+-=] are
 * ignored.
 */

void process_map_item(char *s, int type)
{
    char *p;
    int mode;
    if (*s == ' ')
        s++;                    /* ignore leading blank */
    switch (*s) {
    case '+':                  /* +mapfile.map, +mapline */
        mode = FM_DUPIGNORE;    /* insert entry, if it is not duplicate */
        s++;
        break;
    case '=':                  /* =mapfile.map, =mapline */
        mode = FM_REPLACE;      /* try to replace earlier entry */
        s++;
        break;
    case '-':                  /* -mapfile.map, -mapline */
        mode = FM_DELETE;       /* try to delete entry */
        s++;
        break;
    default:
        mode = FM_DUPIGNORE;    /* like +, but also: */
        mitem->line = NULL;     /* flush default map file name */
    }
    if (*s == ' ')
        s++;                    /* ignore blank after [+-=] */
    p = s;                      /* map item starts here */
    switch (type) {
    case MAPFILE:              /* remove blank at end */
        while (*p != '\0' && *p != ' ')
            p++;
        *p = '\0';
        break;
    case MAPLINE:              /* blank at end allowed */
        break;
    default:
        assert(0);
    }
    if (mitem->line != NULL)    /* read default map file first */
        fm_read_info();
    if (*s != '\0') {           /* only if real item to process */
        mitem->mode = mode;
        mitem->type = type;
        mitem->line = s;
        fm_read_info();
    }
}

void pdfmapfile(int t)
{
    char *s = tokenlist_to_cstring(t, true, NULL);
    process_map_item(s, MAPFILE);
    free(s);
}

void pdfmapline(int t)
{
    char *s = tokenlist_to_cstring(t, true, NULL);
    process_map_item(s, MAPLINE);
    free(s);
}

void pdf_init_map_file(const char *map_name)
{
    assert(mitem == NULL);
    mitem = xtalloc(1, mapitem);
    mitem->mode = FM_DUPIGNORE;
    mitem->type = MAPFILE;
    mitem->line = xstrdup(map_name);
}

/**********************************************************************/
/*
 * Early check whether a font file exists. Search tree ff_tree is used
 * in 1st instance, as it may be faster than the kpse_find_file(), and
 * kpse_find_file() is called only once per font file name + expansion
 * parameter. This might help keeping speed, if many PDF pages with
 * same fonts are to be embedded.
 *
 * The ff_tree contains only font files, which are actually needed,
 * so this tree typically is much smaller than the tfm_tree.
 */

ff_entry *check_ff_exist(char *ff_name, boolean is_tt)
{
    ff_entry *ff;
    ff_entry tmp;
    void **aa;
    int callback_id;
    char *filepath = NULL;

    assert(ff_name != NULL);
    tmp.ff_name = ff_name;
    ff = (ff_entry *) avl_find(ff_tree, &tmp);
    if (ff == NULL) {           /* not yet in database */
        ff = new_ff_entry();
        ff->ff_name = xstrdup(ff_name);
        if (is_tt) {
            callback_id = callback_defined(find_truetype_file_callback);
            if (callback_id > 0) {
                run_callback(callback_id, "S->S", ff_name, &filepath);
                if (filepath && strlen(filepath) == 0)
                    filepath = NULL;
                ff->ff_path = filepath;
            } else {
                ff->ff_path = kpse_find_file(ff_name, kpse_truetype_format, 0);
            }
        } else {
            callback_id = callback_defined(find_type1_file_callback);
            if (callback_id > 0) {
                run_callback(callback_id, "S->S", ff_name, &filepath);
                if (filepath && strlen(filepath) == 0)
                    filepath = NULL;
                ff->ff_path = filepath;
            } else {
                ff->ff_path = kpse_find_file(ff_name, kpse_type1_format, 0);
            }
        }
        aa = avl_probe(ff_tree, ff);
        assert(aa != NULL);
    }
    return ff;
}

/**********************************************************************/

int is_subsetable(fm_entry * fm)
{
    assert(is_included(fm));
    return is_subsetted(fm);
}

/**********************************************************************/
/* cleaning up... */

static void destroy_fm_entry_tfm(void *pa, void *pb)
{
    fm_entry *fm;
    (void) pb;
    fm = (fm_entry *) pa;
    delete_fm_entry(fm);
}

static void destroy_ff_entry(void *pa, void *pb)
{
    ff_entry *ff;
    (void) pb;
    ff = (ff_entry *) pa;
    delete_ff_entry(ff);
}

void fm_free(void)
{
    if (tfm_tree != NULL) {
        avl_destroy(tfm_tree, destroy_fm_entry_tfm);
        tfm_tree = NULL;
    }
    if (ff_tree != NULL) {
        avl_destroy(ff_tree, destroy_ff_entry);
        ff_tree = NULL;
    }
}