Fossil

Changes On Branch markdown-footnotes
Login

Changes On Branch markdown-footnotes

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Changes In Branch markdown-footnotes Excluding Merge-Ins

This is equivalent to a diff from 8d4c4792 to 0850862e

2022-04-23
21:32
Extend Markdown with footnotes support. See known limitations and the corresponding forum thread. ... (check-in: 3990518b user: george tags: trunk)
17:23
Change signature of add_inline_footnote() in order to move away from returning of unreliable pointer. Amend a few comments. Fix a couple of minor issues that fuzzer complains about. ... (Closed-Leaf check-in: 0850862e user: george tags: markdown-footnotes)
15:56
Fix a possible heap-buffer-overflow in parse_htmlblock() introduced by [1e919d601f774fdb]. This is not related to footnotes but was revealed by fuzzing (case 80cbb6b185807e98a953426af7b1f802c9d13957). ... (check-in: bc4c5b63 user: george tags: markdown-footnotes)
2022-04-20
13:55
Added a section to build.wiki about building for fuzz testing. ... (check-in: a42f5af8 user: stephan tags: trunk)
11:48
Merged in trunk for fuzz.c changes. ... (check-in: c9f40135 user: stephan tags: markdown-footnotes)
11:46
Correct fuzz.c to honor --fuzztype markdown and add --fuzztype wiki2 which works like its previous --fuzztype wiki behavior, sending all inputs through both the fossil-wiki and markdown translators. Added a fatal error for --fuzztype artifact, as that tester is not implemented. ... (check-in: 8d4c4792 user: stephan tags: trunk)
09:38
Changed zlib crc type from int to unsigned long, as that's the type returned by zlib's crc32() and doing so reportedly resolves the CRC error reported in forum post 7a9097e557. ... (check-in: 1bf6686e user: stephan tags: trunk)

Changes to Makefile.in.

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
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







+
+
+
+
+
+
+















+
+
+







TCLSH = @TCLSH@

CFLAGS = @CFLAGS@
CFLAGS_INCLUDE = @CFLAGS_INCLUDE@
LIB =	@LDFLAGS@ @EXTRA_LDFLAGS@ @LIBS@
BCCFLAGS =	@CPPFLAGS@ $(CFLAGS)
TCCFLAGS =	@EXTRA_CFLAGS@ @CPPFLAGS@ $(CFLAGS) -DHAVE_AUTOCONFIG_H -D_HAVE_SQLITE_CONFIG_H
#
# Fuzzing may be enable by appending -fsanitize=fuzzer -DFOSSIL_FUZZ
# to the TCCFLAGS variable.
# For more thorouth (but also slower) investigation
#      -fsanitize=fuzzer,undefined,address
# might be more useful.

INSTALLDIR = $(DESTDIR)@prefix@/bin
USE_SYSTEM_SQLITE = @USE_SYSTEM_SQLITE@
SQLITE3_SRC.2 = @SQLITE3_SRC.2@
SQLITE3_OBJ.2 = @SQLITE3_OBJ.2@
SQLITE3_SHELL_SRC.2 = @SQLITE3_SHELL_SRC.2@
SQLITE3_ORIGIN = @SQLITE3_ORIGIN@
# SQLITE3_ORIGIN changes...
#  SQLITE3_SRC:
#   0=src/sqlite3.c, 1=src/sqlite3-see.c, 2=$(SQLITE3_SRC.2)
#  SQLITE3_SHELL_SRC:
#   0=src/shell.c, 1=src/shell-see.c, 2=$(SQLITE3_SHELL_SRC.2)
USE_LINENOISE = @USE_LINENOISE@
USE_MMAN_H = @USE_MMAN_H@
USE_SEE = @USE_SEE@
APPNAME = fossil
#
# APPNAME = fossil-fuzz
# may be more appropriate for fuzzing.

.PHONY: all tags

include $(SRCDIR)/main.mk

distclean: clean
	-rm -f autoconfig.h config.log Makefile

Changes to src/backlink.c.

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
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







+
+











+
+









+
+







void markdown_extract_links(
  char *zInputText,
  Backlink *p
){
  struct mkd_renderer html_renderer = {
    /* prolog     */ (void(*)(Blob*,void*))mkdn_noop0,
    /* epilog     */ (void(*)(Blob*,void*))mkdn_noop0,
    /* footnotes  */ (void(*)(Blob*,const Blob*, void*))mkdn_noop0,

    /* blockcode  */ (void(*)(Blob*,Blob*,void*))mkdn_noop0,
    /* blockquote */ (void(*)(Blob*,Blob*,void*))mkdn_noop0,
    /* blockhtml  */ (void(*)(Blob*,Blob*,void*))mkdn_noop0,
    /* header     */ (void(*)(Blob*,Blob*,int,void*))mkdn_noop0,
    /* hrule      */ (void(*)(Blob*,void*))mkdn_noop0,
    /* list       */ (void(*)(Blob*,Blob*,int,void*))mkdn_noop0,
    /* listitem   */ (void(*)(Blob*,Blob*,int,void*))mkdn_noop0,
    /* paragraph  */ (void(*)(Blob*,Blob*,void*))mkdn_noop0,
    /* table      */ (void(*)(Blob*,Blob*,Blob*,void*))mkdn_noop0,
    /* table_cell */ (void(*)(Blob*,Blob*,int,void*))mkdn_noop0,
    /* table_row  */ (void(*)(Blob*,Blob*,int,void*))mkdn_noop0,
    /* footnoteitm*/ (void(*)(Blob*,const Blob*,int,int,void*))mkdn_noop0,

    /* autolink   */ (int(*)(Blob*,Blob*,enum mkd_autolink,void*))mkdn_noop1,
    /* codespan   */ (int(*)(Blob*,Blob*,int,void*))mkdn_noop1,
    /* dbl_emphas */ (int(*)(Blob*,Blob*,char,void*))mkdn_noop1,
    /* emphasis   */ (int(*)(Blob*,Blob*,char,void*))mkdn_noop1,
    /* image      */ (int(*)(Blob*,Blob*,Blob*,Blob*,void*))mkdn_noop1,
    /* linebreak  */ (int(*)(Blob*,void*))mkdn_noop1,
    /* link       */ backlink_md_link,
    /* r_html_tag */ (int(*)(Blob*,Blob*,void*))mkdn_noop1,
    /* tri_emphas */ (int(*)(Blob*,Blob*,char,void*))mkdn_noop1,
    /* footnoteref*/ (int(*)(Blob*,const Blob*,const Blob*,int,int,void*))mkdn_noop1,

    0,  /* entity */
    0,  /* normal_text */
    "*_", /* emphasis characters */
    0   /* client data */
  };
  Blob out, in;
  html_renderer.opaque = (void*)p;

Changes to src/blob.c.

51
52
53
54
55
56
57























58
59
60
61
62
63
64
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







+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







#define blob_size(X)  ((X)->nUsed)

/*
** The buffer holding the blob data
*/
#define blob_buffer(X)  ((X)->aData)

/*
** Append blob contents to another
*/
#define blob_appendb(dest, src) \
  blob_append((dest), blob_buffer(src), blob_size(src))

/*
** Append a string literal to a blob
** TODO: Consider renaming to blob_appendl()
*/
#define blob_append_literal(blob, literal) \
  blob_append((blob), "" literal, (sizeof literal)-1)
  /*
   * The empty string in the second argument leads to a syntax error
   * when the macro is not used with a string literal. Unfortunately
   * the error is not overly explicit.
   */

/*
** TODO: Suggested for removal because the name seems misleading.
*/
#define blob_append_string blob_append_literal

/*
** Seek whence parameter values
*/
#define BLOB_SEEK_SET 1
#define BLOB_SEEK_CUR 2

#endif /* INTERFACE */
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
346
347
348
349
350
351
352







353
354
355
356
357
358
359







-
-
-
-
-
-
-







  }
  nUsed = pBlob->nUsed;
  pBlob->nUsed += nData;
  pBlob->aData[pBlob->nUsed] = 0;
  memcpy(&pBlob->aData[nUsed], aData, nData);
}

/*
** Append a string literal to a blob.
*/
#if INTERFACE
#define blob_append_string(BLOB,STR) blob_append(BLOB,STR,sizeof(STR)-1)
#endif

/*
** Append a single character to the blob.  If pBlob is zero then the
** character is written directly to stdout.
*/
void blob_append_char(Blob *pBlob, char c){
  if( pBlob==0 || pBlob->nUsed+1 >= pBlob->nAlloc ){
    blob_append_full(pBlob, &c, 1);
501
502
503
504
505
506
507
508

509
510
511
512
513
514
515
517
518
519
520
521
522
523

524
525
526
527
528
529
530
531







-
+







  return p->aData;
}

/*
** Compare two blobs.  Return negative, zero, or positive if the first
** blob is less then, equal to, or greater than the second.
*/
int blob_compare(Blob *pA, Blob *pB){
int blob_compare(const Blob *pA, const Blob *pB){
  int szA, szB, sz, rc;
  blob_is_init(pA);
  blob_is_init(pB);
  szA = blob_size(pA);
  szB = blob_size(pB);
  sz = szA<szB ? szA : szB;
  rc = memcmp(blob_buffer(pA), blob_buffer(pB), sz);

Changes to src/default.css.

1663
1664
1665
1666
1667
1668
1669












































































1670
1671
1672
1673
1674
1675
1676
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752







+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







body.branch .submenu > a.timeline-link.selected {
  display: inline;
}

.monospace {
  font-family: monospace;
}

div.markdown > ol.footnotes {
  font-size: 90%;
}
div.markdown > ol.footnotes > li {
  margin-bottom: 0.5em;
}
div.markdown ol.footnotes > li.fn-joined > sup.fn-joined {
  color: gray;
  font-family: monospace;
}
div.markdown ol.footnotes > li.fn-joined > sup.fn-joined::after {
  content: "(joined from multiple locations) ";
}
div.markdown ol.footnotes > li.fn-misreference {
  margin-top:    0.75em;
  margin-bottom: 0.75em;
}
div.markdown ol.footnotes > li.fn-toodeep > i,
div.markdown ol.footnotes > li.fn-misreference,
div.markdown ol.footnotes > li.fn-unreferenced {
  color: gray;
}
div.markdown ol.footnotes > li.fn-misreference > span {
  color: red;
}
div.markdown ol.footnotes > li.fn-misreference > span::after {
  content: " (use of undefined label).";
}
div.markdown ol.footnotes > li.fn-unreferenced {
  padding-left: 0.5em;
}
div.markdown ol.footnotes > li.fn-unreferenced > code {
  color: red;
}
div.markdown ol.footnotes > li.fn-unreferenced > i::after {
  content: " was defined but is not referenced";
}
div.markdown ol.footnotes > li.fn-toodeep > i::after {
  content: " depth of nesting of inline footnotes exceeded the limit";
}
div.markdown ol.footnotes > li.fn-toodeep > pre,
div.markdown ol.footnotes > li.fn-unreferenced > pre {
  color: gray;
  font-size: 85%;
  padding-left: 0.5em;
  margin-top:  0.25em;
  border-left: 2px solid red;
}
div.markdown ol.footnotes > li.fn-toodeep > pre {
  margin-left: 0.5em;
}
div.markdown > ol.footnotes > li > .fn-backrefs {
  margin-right: 0.5em;
  font-weight: bold;
}
div.markdown > ol.footnotes > li > .fn-backrefs > a,
div.markdown sup.noteref > a {
  padding-left:  2px;
  padding-right: 2px;
}
div.markdown sup.noteref.misref,
div.markdown sup.noteref.misref > a {
  color: red;
  font-size: 90%;
}
div.markdown sup.noteref > a:target,
div.markdown span.notescope:target > sup.noteref > a,
div.markdown span.notescope:hover  > sup.noteref > a,
div.markdown > ol.footnotes > li > .fn-backrefs > a:target {
  background: gold;
}
div.markdown span.notescope:hover,
div.markdown span.notescope:target {
  border-bottom: 2px solid gold;
}

/* Objects in the "desktoponly" class are invisible on mobile */
@media screen and (max-width: 600px) {
  .desktoponly {
    display: none;
  }
}

Changes to src/encode.c.

203
204
205
206
207
208
209






























210
211
212
213
214
215
216
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







+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







** characters are encoded as "%HH" where HH is a two-digit hexidecimal
** representation of the character.  The "/" character is not encoded
** by this routine.
*/
char *urlize(const char *z, int n){
  return EncodeHttp(z, n, 0);
}

/*
** If input string does not contain quotes (niether ' nor ")
** then return the argument itself. Otherwise return a newly allocated
** copy of input with all quotes %-escaped.
*/
const char* escape_quotes(const char *zIn){
  char *zRet, *zOut;
  size_t i, n = 0;
  for(i=0; zIn[i]; i++){
    if( zIn[i]== '"' || zIn[i]== '\'' ) n++;
  }
  if( !n ) return zIn;
  zRet = zOut = fossil_malloc( i + 2*n + 1 );
  for(i=0; zIn[i]; i++){
    if( zIn[i]=='"' ){
      *(zOut++) = '%';
      *(zOut++) = '2';
      *(zOut++) = '2';
    }else if( zIn[i]=='\'' ){
      *(zOut++) = '%';
      *(zOut++) = '2';
      *(zOut++) = '7';
    }else{
      *(zOut++) = zIn[i];
    }
  }
  *zOut = 0;
  return zRet;
}

/*
** Convert a single HEX digit to an integer
*/
static int AsciiToHex(int c){
  if( c>='a' && c<='f' ){
    c += 10 - 'a';

Changes to src/main.c.

322
323
324
325
326
327
328

329
330
331
332
333
334
335
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336







+







      cson_value *v;
      cson_object *o;
    } reqPayload;              /* request payload object (if any) */
    cson_array *warnings;      /* response warnings */
    int timerId;               /* fetched from fossil_timer_start() */
  } json;
#endif /* FOSSIL_ENABLE_JSON */
  int ftntsIssues[4];     /* Counts for misref, strayed, joined, overnested */
  int diffCnt[3];         /* Counts for DIFF_NUMSTAT: files, ins, del */
};

/*
** Macro for debugging:
*/
#define CGIDEBUG(X)  if( g.fDebug ) cgi_debug X

Changes to src/markdown.c.

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
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







+


















+
+
















+
+







};

/* mkd_renderer -- functions for rendering parsed data */
struct mkd_renderer {
  /* document level callbacks */
  void (*prolog)(struct Blob *ob, void *opaque);
  void (*epilog)(struct Blob *ob, void *opaque);
  void (*footnotes)(struct Blob *ob, const struct Blob *items, void *opaque);

  /* block level callbacks - NULL skips the block */
  void (*blockcode)(struct Blob *ob, struct Blob *text, void *opaque);
  void (*blockquote)(struct Blob *ob, struct Blob *text, void *opaque);
  void (*blockhtml)(struct Blob *ob, struct Blob *text, void *opaque);
  void (*header)(struct Blob *ob, struct Blob *text,
            int level, void *opaque);
  void (*hrule)(struct Blob *ob, void *opaque);
  void (*list)(struct Blob *ob, struct Blob *text, int flags, void *opaque);
  void (*listitem)(struct Blob *ob, struct Blob *text,
            int flags, void *opaque);
  void (*paragraph)(struct Blob *ob, struct Blob *text, void *opaque);
  void (*table)(struct Blob *ob, struct Blob *head_row, struct Blob *rows,
              void *opaque);
  void (*table_cell)(struct Blob *ob, struct Blob *text, int flags,
              void *opaque);
  void (*table_row)(struct Blob *ob, struct Blob *cells, int flags,
              void *opaque);
  void (*footnote_item)(struct Blob *ob, const struct Blob *text, 
              int index, int nUsed, void *opaque);

  /* span level callbacks - NULL or return 0 prints the span verbatim */
  int (*autolink)(struct Blob *ob, struct Blob *link,
          enum mkd_autolink type, void *opaque);
  int (*codespan)(struct Blob *ob, struct Blob *text, int nSep, void *opaque);
  int (*double_emphasis)(struct Blob *ob, struct Blob *text,
            char c, void *opaque);
  int (*emphasis)(struct Blob *ob, struct Blob *text, char c,void*opaque);
  int (*image)(struct Blob *ob, struct Blob *link, struct Blob *title,
            struct Blob *alt, void *opaque);
  int (*linebreak)(struct Blob *ob, void *opaque);
  int (*link)(struct Blob *ob, struct Blob *link, struct Blob *title,
          struct Blob *content, void *opaque);
  int (*raw_html_tag)(struct Blob *ob, struct Blob *tag, void *opaque);
  int (*triple_emphasis)(struct Blob *ob, struct Blob *text,
            char c, void *opaque);
  int (*footnote_ref)(struct Blob *ob, const struct Blob *span,
              const struct Blob *upc, int index, int locus, void *opaque);

  /* low level callbacks - NULL copies input directly into the output */
  void (*entity)(struct Blob *ob, struct Blob *entity, void *opaque);
  void (*normal_text)(struct Blob *ob, struct Blob *text, void *opaque);

  /* renderer data */
  const char *emph_chars; /* chars that trigger emphasis rendering */
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
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







+
-
+
+


-
+





+
+
+





+
-
+
+

-
+




+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+










/**********************
 * EXPORTED FUNCTIONS *
 **********************/

/*
/* markdown -- parses the input buffer and renders it into the output buffer */
** markdown -- parses the input buffer and renders it into the output buffer.
*/
void markdown(
  struct Blob *ob,
  struct Blob *ib,
  const struct Blob *ib,
  const struct mkd_renderer *rndr);


#endif /* INTERFACE */

#define BLOB_COUNT(pBlob,el_type) (blob_size(pBlob)/sizeof(el_type))
#define COUNT_FOOTNOTES(pBlob) BLOB_COUNT(pBlob,struct footnote)
#define CAST_AS_FOOTNOTES(pBlob) ((struct footnote*)blob_buffer(pBlob))

/***************
 * LOCAL TYPES *
 ***************/

/*
/* link_ref -- reference to a link */
** link_ref -- reference to a link.
*/
struct link_ref {
  struct Blob id;
  struct Blob id;     /* must be the first field as in footnote struct */
  struct Blob link;
  struct Blob title;
};

/*
** A footnote's data.
** id, text, and upc fields must be in that particular order.
*/
struct footnote {
  struct Blob id;      /* must be the first field as in link_ref struct  */
  struct Blob text;    /* footnote's content that is rendered at the end */
  struct Blob upc;     /* user-provided classes  .ASCII-alnum.or-hypen:  */
  int bRndred;         /* indicates if `text` holds a rendered content   */

  int defno;  /* serial number of definition, set during the first pass  */
  int index;  /* set to the index within array after ordering by id      */
  int iMark;  /* user-visible numeric marker, assigned upon the first use*/
  int nUsed;  /* counts references to this note, increments upon each use*/
};
#define FOOTNOTE_INITIALIZER {empty_blob,empty_blob,empty_blob, 0,0,0,0,0}

/* char_trigger -- function pointer to render active chars */
/*   returns the number of chars taken care of */
/*   data is the pointer of the beginning of the span */
/*   offset is the number of valid chars before data */
struct render;
typedef size_t (*char_trigger)(
154
155
156
157
158
159
160
161
162








163
164
165
166
167
168
169
182
183
184
185
186
187
188

189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204







-

+
+
+
+
+
+
+
+







struct render {
  struct mkd_renderer make;
  struct Blob refs;
  char_trigger active_char[256];
  int iDepth;                    /* Depth of recursion */
  int nBlobCache;                /* Number of entries in aBlobCache */
  struct Blob *aBlobCache[20];   /* Cache of Blobs available for reuse */
};

  struct {
    Blob all;    /* Buffer that holds array of footnotes. Its underline
                    memory may be reallocated when a new footnote is added. */
    int nLbled;  /* number of labeled footnotes found during the first pass */
    int nMarks;  /* counts distinct indices found during the second pass    */
    struct footnote misref; /* nUsed counts misreferences, iMark must be -1 */
  } notes;
};

/* html_tag -- structure for quick HTML tag search (inspired from discount) */
struct html_tag {
  const char *text;
  int size;
};

181
182
183
184
185
186
187
188
189
190
191
192

193



194
195
196
197
198
199
200
216
217
218
219
220
221
222

223
224
225
226
227

228
229
230
231
232
233
234
235
236
237







-




+
-
+
+
+







*/
static const struct html_tag block_tags[] = {
  { "html",         4 },
  { "pre",          3 },
  { "script",       6 },
};


/***************************
 * STATIC HELPER FUNCTIONS *
 ***************************/

/*
/* build_ref_id -- collapse whitespace from input text to make it a ref id */
** build_ref_id -- collapse whitespace from input text to make it a ref id.
** Potential TODO: maybe also handle CR+LF line endings?
*/
static int build_ref_id(struct Blob *id, const char *data, size_t size){
  size_t beg, i;
  char *id_data;

  /* skip leading whitespace */
  while( size>0 && (data[0]==' ' || data[0]=='\t' || data[0]=='\n') ){
    data++;
245
246
247
248
249
250
251
















































252
253
254
255
256
257
258
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







+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







/* cmp_link_ref_sort -- comparison function for link_ref qsort */
static int cmp_link_ref_sort(const void *a, const void *b){
  struct link_ref *lra = (void *)a;
  struct link_ref *lrb = (void *)b;
  return blob_compare(&lra->id, &lrb->id);
}

/*
** cmp_footnote_id -- comparison function for footnotes qsort.
** Empty IDs sort last (in undetermined order).
** Equal IDs are sorted in the order of definition in the source.
*/
static int cmp_footnote_id(const void *fna, const void *fnb){
  const struct footnote *a = fna, *b = fnb;
  const int szA = blob_size(&a->id), szB = blob_size(&b->id);
  if( szA ){
    if( szB ){
      int cmp = blob_compare(&a->id, &b->id);
      if( cmp ) return cmp;
    }else return -1;
  }else return szB ? 1 : 0;
  /* IDs are equal and non-empty */
  if( a->defno < b->defno ) return -1;
  if( a->defno > b->defno ) return  1;
  assert(!"reachable");
  return 0; /* should never reach here */
}

/*
** cmp_footnote_sort -- comparison function for footnotes qsort.
** Unreferenced footnotes (when nUsed == 0) sort last and
** are sorted in the order of definition in the source.
*/
static int cmp_footnote_sort(const void *fna, const void *fnb){
  const struct footnote *a = fna, *b = fnb;
  int i, j;
  assert( a->nUsed >= 0 );
  assert( b->nUsed >= 0 );
  assert( a->defno >= 0 );
  assert( b->defno >= 0 );
  if( a->nUsed ){
    assert( a->iMark >  0 );
    if( !b->nUsed ) return -1;
    assert( b->iMark >  0 );
    i = a->iMark;
    j = b->iMark;
  }else{
    if( b->nUsed )  return  1;
    i = a->defno;
    j = b->defno;
  }
  if( i < j ) return -1;
  if( i > j ) return  1;
  return 0;
}

/* cmp_html_tag -- comparison function for bsearch() (stolen from discount) */
static int cmp_html_tag(const void *a, const void *b){
  const struct html_tag *hta = a;
  const struct html_tag *htb = b;
  int sz = hta->size;
  int c;
577
578
579
580
581
582
583

584
585



586
587
588
589
590
591
592
662
663
664
665
666
667
668
669


670
671
672
673
674
675
676
677
678
679







+
-
-
+
+
+







  if( fossil_isspace(before) ) return 0;
  if( fossil_isalnum(before) ) return 1;
  if( fossil_isalnum(after) ) return 0;
  return 1;
}


/*
/* parse_emph1 -- parsing single emphasis */
/* closed by a symbol not preceded by whitespace and not followed by symbol */
** parse_emph1 -- parsing single emphasis.
** closed by a symbol not preceded by whitespace and not followed by symbol.
*/
static size_t parse_emph1(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t size,
  char c
){
622
623
624
625
626
627
628
629
630



631
632
633
634
635
636
637
709
710
711
712
713
714
715


716
717
718
719
720
721
722
723
724
725







-
-
+
+
+







      release_work_buffer(rndr, work);
      return r ? i+1 : 0;
    }
  }
  return 0;
}


/* parse_emph2 -- parsing single emphasis */
/*
** parse_emph2 -- parsing single emphasis.
*/
static size_t parse_emph2(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t size,
  char c
){
661
662
663
664
665
666
667
668
669
670




671
672
673
674
675
676
677
749
750
751
752
753
754
755



756
757
758
759
760
761
762
763
764
765
766







-
-
-
+
+
+
+







      return r ? i+2 : 0;
    }
    i++;
  }
  return 0;
}


/* parse_emph3 -- parsing single emphasis */
/* finds the first closing tag, and delegates to the other emph */
/*
** parse_emph3 -- parsing single emphasis.
** finds the first closing tag, and delegates to the other emph.
*/
static size_t parse_emph3(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t size,
  char c
){
709
710
711
712
713
714
715
716
717



718
719
720
721
722
723
724
798
799
800
801
802
803
804


805
806
807
808
809
810
811
812
813
814







-
-
+
+
+







      len = parse_emph2(ob, rndr, data-1, size+1, c);
      return len ? len-1 : 0;
    }
  }
  return 0;
}


/* char_emphasis -- single and double emphasis parsing */
/*
** char_emphasis -- single and double emphasis parsing.
*/
static size_t char_emphasis(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
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
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







-
-
+
+
+













-
-
+
+
+







      return 0;
    }
    return ret+3;
  }
  return 0;
}


/* char_linebreak -- '\n' preceded by two spaces (assuming linebreak != 0) */
/*
** char_linebreak -- '\n' preceded by two spaces (assuming linebreak != 0).
*/
static size_t char_linebreak(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
  if( offset<2 || data[-1]!=' ' || data[-2]!=' ' ) return 0;
  /* removing the last space from ob and rendering */
  if( blob_size(ob)>0 && blob_buffer(ob)[blob_size(ob)-1]==' ' ) ob->nUsed--;
  return rndr->make.linebreak(ob, rndr->make.opaque) ? 1 : 0;
}


/* char_codespan -- '`' parsing a code span (assuming codespan != 0) */
/*
** char_codespan -- '`' parsing a code span (assuming codespan != 0).
*/
static size_t char_codespan(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
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
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







+
-
+
+



















-
-
-
+
+
+
+







  }else{
    if( !rndr->make.codespan(ob, 0, nb, rndr->make.opaque) ) end = 0;
  }
  return end;
}


/*
/* char_escape -- '\\' backslash escape */
** char_escape -- '\\' backslash escape.
*/
static size_t char_escape(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
  struct Blob work = BLOB_INITIALIZER;
  if( size>1 ){
    if( rndr->make.normal_text ){
      blob_init(&work, data+1,1);
      rndr->make.normal_text(ob, &work, rndr->make.opaque);
    }else{
      blob_append(ob, data+1, 1);
    }
  }
  return 2;
}


/* char_entity -- '&' escaped when it doesn't belong to an entity */
/* valid entities are assumed to be anything matching &#?[A-Za-z0-9]+; */
/*
** char_entity -- '&' escaped when it doesn't belong to an entity.
** valid entities are assumed to be anything matching &#?[A-Za-z0-9]+;
*/
static size_t char_entity(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
867
868
869
870
871
872
873
874
875



876
877
878
879
880
881
882
962
963
964
965
966
967
968


969
970
971
972
973
974
975
976
977
978







-
-
+
+
+







    rndr->make.entity(ob, &work, rndr->make.opaque);
  }else{
    blob_append(ob, data, end);
  }
  return end;
}


/* char_langle_tag -- '<' when tags or autolinks are allowed */
/*
** char_langle_tag -- '<' when tags or autolinks are allowed.
*/
static size_t char_langle_tag(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
897
898
899
900
901
902
903
904
905


906
907
908
909
910
911
912
993
994
995
996
997
998
999


1000
1001
1002
1003
1004
1005
1006
1007
1008







-
-
+
+







  if( !ret ){
    return 0;
  }else{
    return end;
  }
}


/* get_link_inline -- extract inline-style link and title from
/*
** get_link_inline -- extract inline-style link and title from
** parenthesed data
*/
static int get_link_inline(
  struct Blob *link,
  struct Blob *title,
  char *data,
  size_t size
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
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







-
+




















+
-
+
+








+



-
+


-
+







+
+
+
+
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+



+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

+
+
+
+
+
+
+
+
+
+
+
-
+
+





-
+

-
+




+








-
+
-
-
-
-
-
-
-
-
-
-
+
+
-
-
-
-
-
-
-
-
-
-

+

-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

+
-
-
+
+
-
-
+
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

-
+
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
-
-
+
-
-
-
-
-
-
+
+
+
+
+
-
-
-
-
-
+
+
+
+

-
+






-
+
+
+

+
+
+
+
+











-







       || data[link_e-1]=='\n')
  ){
    link_e--;
  }

  /* remove optional angle brackets around the link */
  if( data[link_b]=='<' ) link_b += 1;
  if( data[link_e-1]=='>' ) link_e -= 1;
  if( link_e && data[link_e-1]=='>' ) link_e -= 1;

  /* escape backslashed character from link */
  blob_reset(link);
  i = link_b;
  while( i<link_e ){
    mark = i;
    while( i<link_e && data[i]!='\\' ){ i++; }
    blob_append(link, data+mark, i-mark);
    while( i<link_e && data[i]=='\\' ){ i++; }
  }

  /* handing back title */
  blob_reset(title);
  if( title_e>title_b ) blob_append(title, data+title_b, title_e-title_b);

  /* this function always succeed */
  return 0;
}


/*
/* get_link_ref -- extract referenced link and title from id */
** get_link_ref -- extract referenced link and title from id.
*/
static int get_link_ref(
  struct render *rndr,
  struct Blob *link,
  struct Blob *title,
  char *data,
  size_t size
){
  struct link_ref *lr;
  const size_t sz = blob_size(&rndr->refs);

  /* find the link from its id (stored temporarily in link) */
  blob_reset(link);
  if( build_ref_id(link, data, size)<0 ) return -1;
  if( !sz || build_ref_id(link, data, size)<0 ) return -1;
  lr = bsearch(link,
               blob_buffer(&rndr->refs),
               blob_size(&rndr->refs)/sizeof(struct link_ref),
               sz/sizeof(struct link_ref),
               sizeof (struct link_ref),
               cmp_link_ref);
  if( !lr ) return -1;

  /* fill the output buffers */
  blob_reset(link);
  blob_reset(title);
  blob_appendb(link, &lr->link);
  blob_appendb(title, &lr->title);
  return 0;
}
  blob_append(link, blob_buffer(&lr->link), blob_size(&lr->link));
  blob_append(title, blob_buffer(&lr->title), blob_size(&lr->title));

/*
** get_footnote() -- find a footnote by label, invoked during the 2nd pass.
** If found then return a shallow copy of the corresponding footnote;
** otherwise return a shallow copy of rndr->notes.misref.
** In both cases corresponding `nUsed` field is incremented before return.
*/
static struct footnote get_footnote(
  struct render *rndr,
  const char *data,
  size_t size
){
  struct footnote *fn = 0;
  struct Blob *id;
  if( !rndr->notes.nLbled ) goto fallback;
  id = new_work_buffer(rndr);
  if( build_ref_id(id, data, size)<0 ) goto cleanup;
  fn = bsearch(id, blob_buffer(&rndr->notes.all),
               rndr->notes.nLbled,
               sizeof (struct footnote),
               cmp_link_ref);
  if( !fn ) goto cleanup;

  if( fn->nUsed == 0 ){  /* the first reference to the footnote */
    assert( fn->iMark == 0 );
    fn->iMark = ++(rndr->notes.nMarks);
  }
  assert( fn->iMark > 0 );
cleanup:
  release_work_buffer( rndr, id );
fallback:
  if( !fn ) fn = &rndr->notes.misref;
  fn->nUsed++;
  assert( fn->nUsed > 0 );
  return *fn;
}

/*
** Counts characters in the blank prefix within at most nHalfLines.
** A sequence of spaces and tabs counts as odd halfline,
** a newline counts as even halfline.
** If nHalfLines < 0 then proceed without constraints.
*/
static inline size_t sizeof_blank_prefix(
  const char *data, size_t size, int nHalfLines
){
  const char *p = data;
  const char * const end = data+size;
  if( nHalfLines < 0 ){
    while( p!=end && fossil_isspace(*p) ){
      p++;
    }
  }else while( nHalfLines > 0 ){
    while( p!=end && (*p==' ' || *p=='\t' ) ){ p++; }
    if( p==end || --nHalfLines == 0 ) break;
    if( *p=='\n' || *p=='\r' ){
      p++;
      if( p==end ) break;
      if( *p=='\n' && p[-1]=='\r' ){
        p++;
      }
    }
    nHalfLines--;
  }
  return p-data;
}

/*
** Check if the data starts with a classlist token of the special form.
** If so then return the length of that token, otherwise return 0.
**
** The token must start with a dot and must end with a colon;
** in between of these it must be a dot-separated list of words;
** each word may contain only alphanumeric characters and hyphens.
**
** If `bBlank` is non-zero then a blank character must follow
** the token's ending colon: otherwise function returns 0
** despite the well-formed token.
*/
static size_t is_footnote_classlist(const char * const data, size_t size,
                                    int bBlank){
  const char *p;
  const char * const end = data+size;
  if( data==end || *data != '.' ) return 0;
  for(p=data+1; p!=end; p++){
    if( fossil_isalnum(*p) || *p=='-' ) continue;
    if( p[-1]=='.' ) break;
    if( *p==':' ){
      p++;
      if( bBlank ){
        if( p==end || !fossil_isspace(*p) ) break;
      }
      return p-data;
    }
    if( *p!='.' ) break;
  }
  return 0;
}

/*
** Adds unlabeled footnote to the rndr->notes.all.
** On success puts a shallow copy of the constructed footnote into pFN
** and returns 1, otherwise pFN is unchanged and 0 is returned.
*/
static inline int add_inline_footnote(
  struct render *rndr,
  const char *text,
  size_t size,
  struct footnote* pFN
){
  struct footnote fn = FOOTNOTE_INITIALIZER, *last;
  const char *zUPC = 0;
  size_t nUPC = 0, n = sizeof_blank_prefix(text, size, 3);
  if( n >= size ) return 0;
  text += n;
  size -= n;
  nUPC = is_footnote_classlist(text, size, 1);
  if( nUPC ){
    assert( nUPC<size );
    zUPC = text;
    text += nUPC;
    size -= nUPC;
  }
  if( sizeof_blank_prefix(text,size,-1)==size ){
    if( !nUPC ) return 0; /* empty inline footnote */
    text = zUPC;
    size = nUPC;          /* bare classlist is treated */
    nUPC = 0;             /* as plain text */
  }
  fn.iMark = ++(rndr->notes.nMarks);
  fn.nUsed  = 1;
  fn.index  = COUNT_FOOTNOTES(&rndr->notes.all);
  assert( fn.iMark > 0 );
  blob_append(&fn.text, text, size);
  if(nUPC) blob_append(&fn.upc, zUPC, nUPC);
  blob_append(&rndr->notes.all, (char *)&fn, sizeof fn);
  last = (struct footnote*)( blob_buffer(&rndr->notes.all)
                            +( blob_size(&rndr->notes.all)-sizeof fn ));
  assert( pFN );
  memcpy( pFN, last, sizeof fn );
  return 1;
}

/*
** Return the byte offset of the matching closing bracket or 0 if not
** found.  begin[0] must be either '[' or '('.
**
** TODO: It seems that things like "\\(" are not handled correctly.
**       That is historical behavior for a corner-case,
**       so it's left as it is until somebody complains.
*/
static inline size_t matching_bracket_offset(
  const char* begin,
  const char* end
){
  const char *i;
  int level;
  const char bra = *begin;
  const char ket = bra=='[' ? ']' : ')';
  assert( bra=='[' || bra=='(' );
  for(i=begin+1,level=1; i!=end; i++){
    if( *i=='\n' )        /* do nothing */;
    else if( i[-1]=='\\' ) continue;
    else if( *i==bra )     level++;
    else if( *i==ket ){
      if( --level<=0 ) return i-begin;
    }
  }
  return 0;
}

/*
** char_footnote -- '(': parsing a standalone inline footnote.
*/
static size_t char_footnote(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
){
  size_t end;
  struct footnote fn;

  if( size<4 || data[1]!='^' ) return 0;
  end = matching_bracket_offset(data, data+size);
  if( !end ) return 0;
  if( !add_inline_footnote(rndr, data+2, end-2, &fn) ) return 0;
  if( rndr->make.footnote_ref ){
    rndr->make.footnote_ref(ob,0,&fn.upc,fn.iMark,1,rndr->make.opaque);
  }
  return end+1;
}

/*
/* char_link -- '[': parsing a link or an image */
** char_link -- '[': parsing a link or an image.
*/
static size_t char_link(
  struct Blob *ob,
  struct render *rndr,
  char *data,
  size_t offset,
  size_t size
  size_t size     /* parse_inline() ensures that size > 0 */
){
  int is_img = (offset && data[-1] == '!'), level;
  const int is_img = (offset && data[-1] == '!');
  size_t i = 1, txt_e;
  struct Blob *content = 0;
  struct Blob *link = 0;
  struct Blob *title = 0;
  struct footnote fn;
  int ret;

  /* checking whether the correct renderer exists */
  if( (is_img && !rndr->make.image) || (!is_img && !rndr->make.link) ){
    return 0;
  }

  /* looking for the matching closing bracket */
  for(level=1; i<size; i++){
  txt_e = matching_bracket_offset(data, data+size);
    if( data[i]=='\n' )        /* do nothing */;
    else if( data[i-1]=='\\' ) continue;
    else if( data[i]=='[' )    level += 1;
    else if( data[i]==']' ){
      level--;
      if( level<=0 ) break;
    }
  }
  if( i>=size ) return 0;
  txt_e = i;
  if( !txt_e ) return 0;
  i = txt_e + 1;
  i++;

  /* skip any amount of whitespace or newline */
  /* (this is much more laxist than original markdown syntax) */
  while( i<size && (data[i]==' ' || data[i]=='\t' || data[i]=='\n') ){ i++; }

  /* allocate temporary buffers to store content, link and title */
  title = new_work_buffer(rndr);
  content = new_work_buffer(rndr);
  link = new_work_buffer(rndr);
  ret = 0; /* error if we don't get to the callback */
  fn.nUsed = 0;

  /* inline style link */
  if( i<size && data[i]=='(' ){
    size_t span_end = i;
    while( span_end<size
     && !(data[span_end]==')' && (span_end==i || data[span_end-1]!='\\'))
    ){
      span_end++;
    }
  /* free-standing footnote refernece */
  if(!is_img && size>3 && data[1]=='^'){
    fn = get_footnote(rndr, data+2, txt_e-2);
  }else{

    /* skip "inter-bracket-whitespace" - any amount of whitespace or newline */
    /* (this is much more lax than original markdown syntax) */
    while( i<size && (data[i]==' ' || data[i]=='\t' || data[i]=='\n') ){ i++; }

    /* allocate temporary buffers to store content, link and title */
    title = new_work_buffer(rndr);
    content = new_work_buffer(rndr);
    link = new_work_buffer(rndr);

    if( i<size && data[i]=='(' ){

      if( i+2<size && data[i+1]=='^' ){  /* span-bounded inline footnote */
    if( span_end>=size
     || get_link_inline(link, title, data+i+1, span_end-(i+1))<0

        const size_t k = matching_bracket_offset(data+i, data+size);
    ){
      goto char_link_cleanup;
        if( !k ) goto char_link_cleanup;
    }

    i = span_end+1;

  /* reference style link */
  }else if( i<size && data[i]=='[' ){
    char *id_data;
    size_t id_size, id_end = i;
        add_inline_footnote(rndr, data+(i+2), k-2, &fn);
        i += k+1;
      }else{                             /* inline style link  */
        size_t span_end = i;
        while( span_end<size
               && !(data[span_end]==')'
                    && (span_end==i || data[span_end-1]!='\\')) ){
          span_end++;
        }
        if( span_end>=size
            || get_link_inline(link, title, data+i+1, span_end-(i+1))<0 ){
          goto char_link_cleanup;
        }
        i = span_end+1;
      }
    /* reference style link or span-bounded footnote reference */
    }else if( i<size && data[i]=='[' ){
      char *id_data;
      size_t id_size, id_end = i;
      int bFootnote;

    while( id_end<size && data[id_end]!=']' ){ id_end++; }
      while( id_end<size && data[id_end]!=']' ){ id_end++; }

    if( id_end>=size ) goto char_link_cleanup;

    if( i+1==id_end ){
      /* implicit id - use the contents */
      id_data = data+1;
      id_size = txt_e-1;
    }else{
      /* explicit id - between brackets */
      id_data = data+i+1;
      id_size = id_end-(i+1);
    }

    if( get_link_ref(rndr, link, title, id_data, id_size)<0 ){
      goto char_link_cleanup;
    }
      if( id_end>=size ) goto char_link_cleanup;
      bFootnote = data[i+1]=='^';
      if( i+1==id_end || (bFootnote && i+2==id_end) ){
        /* implicit id - use the contents */
        id_data = data+1;
        id_size = txt_e-1;
      }else{
        /* explicit id - between brackets */
        id_data = data+i+1;
        id_size = id_end-(i+1);
        if( bFootnote ){
          id_data++;
          id_size--;
        }
      }
      if( bFootnote ){
        fn = get_footnote(rndr, id_data, id_size);
      }else if( get_link_ref(rndr, link, title, id_data, id_size)<0 ){
        goto char_link_cleanup;
      }

    i = id_end+1;
      i = id_end+1;

  /* shortcut reference style link */
  }else{
    if( get_link_ref(rndr, link, title, data+1, txt_e-1)<0 ){
      goto char_link_cleanup;
    }
    /* shortcut reference style link */
    }else{
      if( get_link_ref(rndr, link, title, data+1, txt_e-1)<0 ){
        goto char_link_cleanup;
      }

    /* rewinding the whitespace */
    i = txt_e+1;
  }

      /* rewinding an "inter-bracket-whitespace" */
      i = txt_e+1;
    }
  }
  /* building content: img alt is escaped, link content is parsed */
  if( txt_e>1 ){
  if( txt_e>1 && content ){
    if( is_img ) blob_append(content, data+1, txt_e-1);
    else parse_inline(content, rndr, data+1, txt_e-1);
  }

  /* calling the relevant rendering function */
  if( is_img ){
    if( blob_size(ob)>0 && blob_buffer(ob)[blob_size(ob)-1]=='!' ) ob->nUsed--;
    if( blob_size(ob)>0 && blob_buffer(ob)[blob_size(ob)-1]=='!' ){
      ob->nUsed--;
    }
    ret = rndr->make.image(ob, link, title, content, rndr->make.opaque);
  }else if( fn.nUsed ){
    if( rndr->make.footnote_ref ){
      ret = rndr->make.footnote_ref(ob, content, &fn.upc, fn.iMark,
                                    fn.nUsed, rndr->make.opaque);
    }
  }else{
    ret = rndr->make.link(ob, link, title, content, rndr->make.opaque);
  }

  /* cleanup */
char_link_cleanup:
  release_work_buffer(rndr, title);
  release_work_buffer(rndr, link);
  release_work_buffer(rndr, content);
  return ret ? i : 0;
}



/*********************************
 * BLOCK-LEVEL PARSING FUNCTIONS *
 *********************************/

/* is_empty -- returns the line length when it is empty, 0 otherwise */
1804
1805
1806
1807
1808
1809
1810

1811

1812
1813
1814
1815
1816
1817
1818
2107
2108
2109
2110
2111
2112
2113
2114

2115
2116
2117
2118
2119
2120
2121
2122







+
-
+







  if( !found ) return 0;

  /* the end of the block has been found */
  if( strcmp(curtag->text,"html")==0 ){
    /* Omit <html> tags */
    enum mkd_autolink dummy;
    int k = tag_length(data, size, &dummy);
    int sz = i - (j+k);
    blob_init(&work, data+k, i-(j+k));
    if( sz>0 ) blob_init(&work, data+k, sz);
  }else{
    blob_init(&work, data, i);
  }
  if( rndr->make.blockhtml ){
    rndr->make.blockhtml(ob, &work, rndr->make.opaque);
  }
  return i;
2011
2012
2013
2014
2015
2016
2017


2018

2019
2020
2021
2022
2023
2024
2025
2315
2316
2317
2318
2319
2320
2321
2322
2323

2324
2325
2326
2327
2328
2329
2330
2331







+
+
-
+







  struct Blob *ob,        /* output blob */
  struct render *rndr,    /* renderer internal state */
  char *data,             /* input text */
  size_t size             /* input text size */
){
  size_t beg, end, i;
  char *txt_data;
  int has_table;
  if( !size ) return;
  int has_table = (rndr->make.table
  has_table = (rndr->make.table
    && rndr->make.table_row
    && rndr->make.table_cell
    && memchr(data, '|', size)!=0);

  beg = 0;
  while( beg<size ){
    txt_data = data+beg;
2061
2062
2063
2064
2065
2066
2067
2068

2069
2070
2071
2072
2073
2074
2075
2367
2368
2369
2370
2371
2372
2373

2374
2375
2376
2377
2378
2379
2380
2381







-
+








/*********************
 * REFERENCE PARSING *
 *********************/

/* is_ref -- returns whether a line is a reference or not */
static int is_ref(
  char *data,         /* input text */
  const char *data,   /* input text */
  size_t beg,         /* offset of the beginning of the line */
  size_t end,         /* offset of the end of the text */
  size_t *last,       /* last character of the link */
  struct Blob *refs   /* array of link references */
){
  size_t i = 0;
  size_t id_offset, id_end;
2095
2096
2097
2098
2099
2100
2101


2102
2103
2104
2105
2106
2107
2108
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416







+
+







    }
  }
  i += beg;

  /* id part: anything but a newline between brackets */
  if( data[i]!='[' ) return 0;
  i++;
  if( i>=end || data[i]=='^' ) return 0;  /* see is_footnote() */

  id_offset = i;
  while( i<end && data[i]!='\n' && data[i]!='\r' && data[i]!=']' ){ i++; }
  if( i>=end || data[i]!=']' ) return 0;
  id_end = i;

  /* spacer: colon (space | tab)* newline? (space | tab)* */
  i++;
2123
2124
2125
2126
2127
2128
2129

2130
2131
2132
2133
2134
2135
2136
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445







+







   && data[i]!=' '
   && data[i]!='\t'
   && data[i]!='\n'
   && data[i]!='\r'
  ){
    i += 1;
  }
  /* TODO: maybe require both data[i-1]=='>' && data[link_offset-1]=='<' ? */
  if( data[i-1]=='>' ) link_end = i-1; else link_end = i;

  /* optional spacer: (space | tab)* (newline | '\'' | '"' | '(' ) */
  while( i<end && (data[i]==' ' || data[i]=='\t') ){ i++; }
  if( i<end
   && data[i]!='\n'
   && data[i]!='\r'
2182
2183
2184
2185
2186
2187
2188



2189

























































































































2190
2191
2192
2193
2194
2195
2196
2197
2198

2199
2200
2201

2202
2203
2204
2205


2206
2207
2208
2209
2210
2211
2212










2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225

2226
2227
2228
2229

2230

2231

2232

2233
2234



2235
2236
2237
2238

2239
2240
2241
2242
2243


2244
2245

2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262

2263





























































2264
2265
2266




















































































2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279








2280
2281
2282
2283
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630

2631
2632
2633
2634
2635
2636
2637


2638
2639
2640
2641
2642
2643
2644
2645

2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674

2675
2676
2677

2678


2679
2680
2681
2682
2683
2684

2685
2686
2687
2688


2689
2690
2691

2692


2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882







+
+
+

+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+








-
+



+


-
-
+
+






-
+
+
+
+
+
+
+
+
+
+













+




+
-
+

+
-
+
-
-
+
+
+



-
+



-
-
+
+

-
+
-
-















+

+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+



+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+













+
+
+
+
+
+
+
+




  if( title_end>title_offset ){
    blob_append(&lr.title, data+title_offset, title_end-title_offset);
  }
  blob_append(refs, (char *)&lr, sizeof lr);
  return 1;
}

/*********************
 * FOOTNOTE PARSING  *
 *********************/

/* is_footnote -- check if data holds a definition of a labeled footnote.
 * If so then append the corresponding element to `footnotes` array */
static int is_footnote(
  const char *data,   /* input text */
  size_t beg,         /* offset of the beginning of the line */
  size_t end,         /* offset of the end of the text */
  size_t *last,       /* last character of the link */
  struct Blob * footnotes
){
  size_t i, id_offset, id_end, upc_offset, upc_size;
  struct footnote fn = FOOTNOTE_INITIALIZER;

  /* failfast if data is too short */
  if( beg+5>=end ) return 0;
  i = beg;

  /* footnote definition must start at the begining of a line */
  if( data[i]!='[' ) return 0;
  i++;
  if( data[i]!='^' ) return 0;
  id_offset = ++i;

  /* id part: anything but a newline between brackets */
  while( i<end && data[i]!=']' && data[i]!='\n' && data[i]!='\r' ){ i++; }
  if( i>=end || data[i]!=']' ) return 0;
  id_end = i++;

  /* spacer: colon (space | tab)* */
  if( i>=end || data[i]!=':' ) return 0;
  i++;
  while( i<end && (data[i]==' ' || data[i]=='\t') ){ i++; }

  /* passthrough truncated footnote definition */
  if( i>=end ) return 0;

  if( build_ref_id(&fn.id, data+id_offset, id_end-id_offset)<0 ) return 0;

  /* footnote's text may start on the same line after [^id]: */
  upc_offset = upc_size = 0;
  if( data[i]!='\n' && data[i]!='\r' ){
    size_t j;
    upc_size = is_footnote_classlist(data+i, end-i, 1);
    upc_offset = i; /* prevent further checks for a classlist */
    i += upc_size;
    j = i;
    while( i<end && data[i]!='\n' && data[i]!='\r' ){ i++; };
    if( i!=j )blob_append(&fn.text, data+j, i-j);
    if( i<end ){
      blob_append_char(&fn.text, data[i]);
      i++;
      if( i<end && data[i]=='\n' && data[i-1]=='\r' ){
        blob_append_char(&fn.text, data[i]);
        i++;
      }
    }
  }else{
    i++;
    if( i<end && data[i]=='\n' && data[i-1]=='\r' ) i++;
  }
  if( i<end ){

    /* compute the indentation from the 2nd line  */
    size_t indent = i;
    const char *spaces = data+i;
    while( indent<end && data[indent]==' ' ){ indent++; }
    if( indent>=end ) goto footnote_finish;
    indent -= i;
    if( indent<2 ) goto footnote_finish;

    /* process the 2nd and subsequent lines */
    while( i+indent<end && memcmp(data+i,spaces,indent)==0 ){
      size_t j;
      i += indent;
      if( !upc_offset ){
        /* a classlist must be provided no later than at the 2nd line */
        upc_offset = i + sizeof_blank_prefix(data+i, end-i, 1);
        upc_size = is_footnote_classlist(data+upc_offset,
                                         end-upc_offset, 1);
        if( upc_size ){
          i = upc_offset + upc_size;
        }
      }
      j = i;
      while( i<end && data[i]!='\n' && data[i]!='\r' ){ i++; }
      if( i!=j ) blob_append(&fn.text, data+j, i-j);
      if( i>=end ) break;
      blob_append_char(&fn.text, data[i]);
      i++;
      if( i<end && data[i]=='\n' && data[i-1]=='\r' ){
        blob_append_char(&fn.text, data[i]);
        i++;
      }
    }
  }
footnote_finish:
  if( !blob_size(&fn.text) ){
    blob_reset(&fn.id);
    return 0;
  }
  if( !blob_trim(&fn.text) ){  /* if the content is all-blank */
    if( upc_size ){            /* interpret UPC as plain text */
      blob_append(&fn.text, data+upc_offset, upc_size);
      upc_size = 0;
    }else{
      blob_reset(&fn.id);      /* or clean up and fail */
      blob_reset(&fn.text);
      return 0;
    }
  }
  /* a valid note has been found */
  if( last ) *last = i;
  if( footnotes ){
    fn.defno = COUNT_FOOTNOTES( footnotes );
    if( upc_size ){
      assert( upc_offset && upc_offset+upc_size<end );
      blob_append(&fn.upc, data+upc_offset, upc_size);
    }
    blob_append(footnotes, (char *)&fn, sizeof fn);
  }
  return 1;
}

/**********************
 * EXPORTED FUNCTIONS *
 **********************/

/* markdown -- parses the input buffer and renders it into the output buffer */
void markdown(
  struct Blob *ob,                   /* output blob for rendered text */
  struct Blob *ib,                   /* input blob in markdown */
  const struct Blob *ib,             /* input blob in markdown */
  const struct mkd_renderer *rndrer  /* renderer descriptor (callbacks) */
){
  struct link_ref *lr;
  struct footnote *fn;
  size_t i, beg, end = 0;
  struct render rndr;
  char *ib_data;
  Blob text = BLOB_INITIALIZER;
  Blob text = BLOB_INITIALIZER;        /* input after the first pass  */
  Blob * const allNotes = &rndr.notes.all;

  /* filling the render structure */
  if( !rndrer ) return;
  rndr.make = *rndrer;
  rndr.nBlobCache = 0;
  rndr.iDepth = 0;
  rndr.refs = empty_blob;
  rndr.refs  = empty_blob;
  rndr.notes.all = empty_blob;
  rndr.notes.nMarks = 0;
  rndr.notes.misref.id    = empty_blob;
  rndr.notes.misref.text  = empty_blob;
  rndr.notes.misref.upc   = empty_blob;
  rndr.notes.misref.bRndred = 0;
  rndr.notes.misref.nUsed =  0;
  rndr.notes.misref.iMark = -1;

  for(i=0; i<256; i++) rndr.active_char[i] = 0;
  if( (rndr.make.emphasis
    || rndr.make.double_emphasis
    || rndr.make.triple_emphasis)
   && rndr.make.emph_chars
  ){
    for(i=0; rndr.make.emph_chars[i]; i++){
      rndr.active_char[(unsigned char)rndr.make.emph_chars[i]] = char_emphasis;
    }
  }
  if( rndr.make.codespan ) rndr.active_char['`'] = char_codespan;
  if( rndr.make.linebreak ) rndr.active_char['\n'] = char_linebreak;
  if( rndr.make.image || rndr.make.link ) rndr.active_char['['] = char_link;
  if( rndr.make.footnote_ref ) rndr.active_char['('] = char_footnote;
  rndr.active_char['<'] = char_langle_tag;
  rndr.active_char['\\'] = char_escape;
  rndr.active_char['&'] = char_entity;

  /* first pass: iterate over lines looking for references,
  /* first pass: looking for references, copying everything else */
   * copying everything else into "text" */
  beg = 0;
  for(const size_t size = blob_size(ib); beg<size ;){
  ib_data = blob_buffer(ib);
    const char* const data = blob_buffer(ib);
  while( beg<blob_size(ib) ){ /* iterating over lines */
    if( is_ref(ib_data, beg, blob_size(ib), &end, &rndr.refs) ){
    if( is_ref(data, beg, size, &end, &rndr.refs) ){
      beg = end;
    }else if(is_footnote(data, beg, size, &end, &rndr.notes.all)){
      beg = end;
    }else{ /* skipping to the next line */
      end = beg;
      while( end<blob_size(ib) && ib_data[end]!='\n' && ib_data[end]!='\r' ){
      while( end<size && data[end]!='\n' && data[end]!='\r' ){
        end += 1;
      }
      /* adding the line body if present */
      if( end>beg ) blob_append(&text, ib_data + beg, end - beg);
      while( end<blob_size(ib) && (ib_data[end]=='\n' || ib_data[end]=='\r') ){
      if( end>beg ) blob_append(&text, data + beg, end - beg);
      while( end<size && (data[end]=='\n' || data[end]=='\r') ){
        /* add one \n per newline */
        if( ib_data[end]=='\n'
        if( data[end]=='\n' || (end+1<size && data[end+1]!='\n') ){
         || (end+1<blob_size(ib) && ib_data[end+1]!='\n')
        ){
          blob_append_char(&text, '\n');
        }
        end += 1;
      }
      beg = end;
    }
  }

  /* sorting the reference array */
  if( blob_size(&rndr.refs) ){
    qsort(blob_buffer(&rndr.refs),
          blob_size(&rndr.refs)/sizeof(struct link_ref),
          sizeof(struct link_ref),
          cmp_link_ref_sort);
  }
  rndr.notes.nLbled = COUNT_FOOTNOTES( allNotes );

  /* sort footnotes by ID and join duplicates */
  if( rndr.notes.nLbled > 1 ){
    int nDups = 0;
    fn = CAST_AS_FOOTNOTES( allNotes );
    qsort(fn, rndr.notes.nLbled, sizeof(struct footnote), cmp_footnote_id);

    /* concatenate footnotes with equal labels */
    for(i=0; i<rndr.notes.nLbled ;){
      struct footnote *x = fn + i;
      size_t j = i+1, k = blob_size(&x->text) + 64 + blob_size(&x->upc);
      while(j<rndr.notes.nLbled && !blob_compare(&x->id, &fn[j].id)){
        k += blob_size(&fn[j].text) + 10 + blob_size(&fn[j].upc);
        j++;
        nDups++;
      }
      if( i+1<j ){
        Blob list = empty_blob;
        blob_reserve(&list, k);
        /* must match _joined_footnote_indicator in html_footnote_item() */
        blob_append_literal(&list, "<ul class='fn-joined'>\n");
        for(k=i; k<j; k++){
          struct footnote *y = fn + k;
          blob_append_literal(&list, "<li>");
          if( blob_size(&y->upc) ){
            blob_appendb(&list, &y->upc);
            blob_reset(&y->upc);
          }
          blob_appendb(&list, &y->text);
          blob_append_literal(&list, "</li>\n");

          /* free memory buffer */
          blob_reset(&y->text);
          if( k!=i ) blob_reset(&y->id);
        }
        blob_append_literal(&list, "</ul>\n");
        x->text = list;
        g.ftntsIssues[2]++;
      }
      i = j;
    }
    if( nDups ){  /* clean rndr.notes.all from invalidated footnotes */
      const int n = rndr.notes.nLbled - nDups;
      struct Blob filtered = empty_blob;
      blob_reserve(&filtered, n*sizeof(struct footnote));
      for(i=0; i<rndr.notes.nLbled; i++){
        if( blob_size(&fn[i].id) ){
          blob_append(&filtered, (char*)(fn+i), sizeof(struct footnote));
        }
      }
      blob_reset( allNotes );
      rndr.notes.all = filtered;
      rndr.notes.nLbled = n;
      assert( COUNT_FOOTNOTES(allNotes) == rndr.notes.nLbled );
    }
  }
  fn = CAST_AS_FOOTNOTES( allNotes );
  for(i=0; i<rndr.notes.nLbled; i++){
    fn[i].index = i;
  }
  assert( rndr.notes.nMarks==0 );

  /* second pass: actual rendering */
  if( rndr.make.prolog ) rndr.make.prolog(ob, rndr.make.opaque);
  parse_block(ob, &rndr, blob_buffer(&text), blob_size(&text));

  if( blob_size(allNotes) || rndr.notes.misref.nUsed ){

    /* Footnotes must be parsed for the correct discovery of (back)links */
    Blob *notes = new_work_buffer( &rndr );
    if( blob_size(allNotes) ){
      Blob *tmp   = new_work_buffer( &rndr );
      int nMarks = -1, maxDepth = 5;

      /* inline notes may get appended to rndr.notes.all while rendering */
      while(1){
        struct footnote *aNotes;
        const int N = COUNT_FOOTNOTES( allNotes );

        /* make a shallow copy of `allNotes` */
        blob_truncate(notes,0);
        blob_appendb(notes, allNotes);
        aNotes = CAST_AS_FOOTNOTES(notes);
        qsort(aNotes, N, sizeof(struct footnote), cmp_footnote_sort);

        if( --maxDepth < 0 || nMarks == rndr.notes.nMarks ) break;
        nMarks = rndr.notes.nMarks;

        for(i=0; i<N; i++){
          const int j = aNotes[i].index;
          struct footnote *x = CAST_AS_FOOTNOTES(allNotes) + j;
          assert( 0<=j && j<N );
          if( x->bRndred || !x->nUsed ) continue;
          assert( x->iMark > 0 );
          assert( blob_size(&x->text) );
          blob_truncate(tmp,0);

          /* `allNotes` may be altered and extended through this call */
          parse_inline(tmp, &rndr, blob_buffer(&x->text), blob_size(&x->text));

          x = CAST_AS_FOOTNOTES(allNotes) + j;
          blob_truncate(&x->text,0);
          blob_appendb(&x->text, tmp);
          x->bRndred = 1;
        }
      }
      release_work_buffer(&rndr,tmp);
    }

    /* footnotes rendering */
    if( rndr.make.footnote_item && rndr.make.footnotes ){
      Blob *all_items = new_work_buffer(&rndr);
      int j = -1;

      /* Assert that the in-memory layout of id, text and upc within
      ** footnote struct matches the expectations of html_footnote_item()
      ** If it doesn't then a compiler has done something very weird.
      */
      assert( &(rndr.notes.misref.id)  == &(rndr.notes.misref.text) - 1 );
      assert( &(rndr.notes.misref.upc) == &(rndr.notes.misref.text) + 1 );

      for(i=0; i<COUNT_FOOTNOTES(notes); i++){
        const struct footnote* x = CAST_AS_FOOTNOTES(notes) + i;
        const int xUsed = x->bRndred ? x->nUsed : 0;
        if( !x->iMark ) break;
        assert( x->nUsed );
        rndr.make.footnote_item(all_items, &x->text, x->iMark,
                                     xUsed, rndr.make.opaque);
        if( !xUsed ) g.ftntsIssues[3]++;  /* an overnested footnote */
        j = i;
      }
      if( rndr.notes.misref.nUsed ){
        rndr.make.footnote_item(all_items, 0, -1,
                    rndr.notes.misref.nUsed, rndr.make.opaque);
        g.ftntsIssues[0] += rndr.notes.misref.nUsed;
      }
      while( ++j < COUNT_FOOTNOTES(notes) ){
        const struct footnote* x = CAST_AS_FOOTNOTES(notes) + j;
        assert( !x->iMark );
        assert( !x->nUsed );
        assert( !x->bRndred );
        rndr.make.footnote_item(all_items,&x->text,0,0,rndr.make.opaque);
        g.ftntsIssues[1]++;
      }
      rndr.make.footnotes(ob, all_items, rndr.make.opaque);
      release_work_buffer(&rndr, all_items);
    }
    release_work_buffer(&rndr, notes);
  }
  if( rndr.make.epilog ) rndr.make.epilog(ob, rndr.make.opaque);

  /* clean-up */
  assert( rndr.iDepth==0 );
  blob_reset(&text);
  lr = (struct link_ref *)blob_buffer(&rndr.refs);
  end = blob_size(&rndr.refs)/sizeof(struct link_ref);
  for(i=0; i<end; i++){
    blob_reset(&lr[i].id);
    blob_reset(&lr[i].link);
    blob_reset(&lr[i].title);
  }
  blob_reset(&rndr.refs);
  fn = CAST_AS_FOOTNOTES( allNotes );
  end = COUNT_FOOTNOTES( allNotes );
  for(i=0; i<end; i++){
    if(blob_size(&fn[i].id)) blob_reset(&fn[i].id);
    if(blob_size(&fn[i].upc)) blob_reset(&fn[i].upc);
    blob_reset(&fn[i].text);
  }
  blob_reset(&rndr.notes.all);
  for(i=0; i<rndr.nBlobCache; i++){
    fossil_free(rndr.aBlobCache[i]);
  }
}

Changes to src/markdown.md.

150
151
152
153
154
155
156
































157
158
159
160
161
162
163
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







+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







> Formatted using [Pikchr](https://pikchr.org/home), resulting in:

>
~~~ pikchr
oval "Start" fit; arrow; box "Hello, World!" fit; arrow; oval "Done" fit
~~~

<a id="ftnts"></a>
## Footnotes ##

> Footnotes (or "endnotes") is a Fossil's extention of classical Markdown.
> Fossil's syntax for footnotes is similar to links and
> is distinguished by the use of character **^**
> that *immediately* follows an opening bracket.

> 1. **\(^** footnote's text **)**
> 2. **\[** fragment of text **]\(^** a comment about that fragment **\)**
> 3. **\[^**&nbsp;label&nbsp;**\]**
> 4. **\[** fragment of text **\]\[^**&nbsp;label&nbsp;**\]**
> 5. **\[** fragment of text **\]\[^\]**

> With formats 1 and 2 ("inline footnotes") text of a footnote is provided
> in the place where the corresponding numeric mark will be rendered.
> With formats 3, 4, and 5 ("reference footnotes") text of a footnote
> is supplied elsewhere in the document, as shown below.
> Formats 2, 4 and 5 ("span-specific footnotes") mark a specific fragment
> that is being commented in the footnote.
> Format 5 reuses a fragment of text as a label.
> Labels are case-insensitive.

> ```
> [^label]: Footnote definition must start on the first column.
>      The second line (if any) must be indented by two or more spaces.
>      Definition continues until indentation drops below that of the 2nd line.
>```
> Character **^** is not part of a label, it is part of the syntax.
> Both a footnote's text and a fragment to which a footnote applies
> are subject to further interpretation as Markdown sources.

## Miscellaneous ##

> *   In-line images are made using **\!\[alt-text\]\(image-URL\)**.
> *   Use HTML for advanced formatting such as forms.
> *   **\<!--** HTML-style comments **-->** are supported.
> *   Escape special characters (ex: **\[** **\(** **\|** **\***)
>     using backslash (ex: **\\\[** **\\\(** **\\\|** **\\\***).

Changes to src/markdown_html.c.

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
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







+
+
+
+
+
+
+
+
+
+







+
+
+
+
+







-
-
-
-
-
-
-
-
-
-
-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+







void markdown_to_html(
  struct Blob *input_markdown,
  struct Blob *output_title,
  struct Blob *output_body);

#endif /* INTERFACE */

/*
** Markdown-internal helper for generating unique link reference IDs.
** Fields provide typed interpretation of the underline memory buffer.
*/
typedef union bitfield64_t bitfield64_t;
union bitfield64_t{
  char c[8];           /* interpret as the array of  signed  characters */
  unsigned char b[8];  /* interpret as the array of unsigned characters */
};

/*
** An instance of the following structure is passed through the
** "opaque" pointer.
*/
typedef struct MarkdownToHtml MarkdownToHtml;
struct MarkdownToHtml {
  Blob *output_title;     /* Store the title here */
  bitfield64_t unique;    /* Enables construction of unique #id elements */

  #ifndef FOOTNOTES_WITHOUT_URI
  Blob reqURI;            /* REQUEST_URI with escaped quotes */
  #endif
};


/* INTER_BLOCK -- skip a line between block level elements */
#define INTER_BLOCK(ob) \
  do { if( blob_size(ob)>0 ) blob_append_char(ob, '\n'); } while (0)

/* BLOB_APPEND_LITERAL -- append a string literal to a blob */
#define BLOB_APPEND_LITERAL(blob, literal) \
  blob_append((blob), "" literal, (sizeof literal)-1)
  /*
   * The empty string in the second argument leads to a syntax error
   * when the macro is not used with a string literal. Unfortunately
   * the error is not overly explicit.
   */

/* BLOB_APPEND_BLOB -- append blob contents to another */
#define BLOB_APPEND_BLOB(dest, src) \
  blob_append((dest), blob_buffer(src), blob_size(src))

/*
** FOOTNOTES_WITHOUT_URI macro was introduced by [2c1f8f3592ef00e0]
** to enable flexibility in rendering of footnote-specific hyperlinks.
** It may be defined for a particular build in order to omit
** full REQUEST_URIs within footnote-specific (and page-local) hyperlinks.
** This *is* used for the builds that incorporate 'base-href-fix' branch
** (which in turn fixes footnotes on the preview tab of /wikiedit page).
*/
#ifndef FOOTNOTES_WITHOUT_URI
  #define BLOB_APPEND_URI(dest,ctx) blob_appendb(dest,&((ctx)->reqURI))
#else
  #define BLOB_APPEND_URI(dest,ctx)
#endif

/* Converts an integer to a textual base26 representation
** with proper null-termination.
 * Return empty string if that integer is negative.   */
static bitfield64_t to_base26(int i, int uppercase){
  bitfield64_t x;
  int j;
  memset( &x, 0, sizeof(x) );
  if( i >= 0 ){
    for(j=7; j >= 0; j--){
      x.b[j] = (unsigned char)(uppercase?'A':'a') + i%26;
      if( (i /= 26) == 0 ) break;
    }
    assert( j > 0 );    /* because 2^32 < 26^7 */
    for(i=0; i<8-j; i++)  x.b[i] = x.b[i+j];
    for(   ; i<8  ; i++)  x.b[i] = 0;
  }
  assert( x.c[7] == 0 );
  return x;
}

/* HTML escapes
**
** html_escape() converts < to &lt;, > to &gt;, and & to &amp;.
** html_quote() goes further and converts " into &quot; and ' in &#39;.
*/
static void html_quote(struct Blob *ob, const char *data, size_t size){
76
77
78
79
80
81
82
83

84
85

86
87

88
89

90
91

92
93
94
95
96
97
98
111
112
113
114
115
116
117

118
119

120
121

122
123

124
125

126
127
128
129
130
131
132
133







-
+

-
+

-
+

-
+

-
+







     && data[i]!='\''
    ){
      i++;
    }
    blob_append(ob, data+beg, i-beg);
    while( i<size ){
      if( data[i]=='<' ){
        BLOB_APPEND_LITERAL(ob, "&lt;");
        blob_append_literal(ob, "&lt;");
      }else if( data[i]=='>' ){
        BLOB_APPEND_LITERAL(ob, "&gt;");
        blob_append_literal(ob, "&gt;");
      }else if( data[i]=='&' ){
        BLOB_APPEND_LITERAL(ob, "&amp;");
        blob_append_literal(ob, "&amp;");
      }else if( data[i]=='"' ){
        BLOB_APPEND_LITERAL(ob, "&quot;");
        blob_append_literal(ob, "&quot;");
      }else if( data[i]=='\'' ){
        BLOB_APPEND_LITERAL(ob, "&#39;");
        blob_append_literal(ob, "&#39;");
      }else{
        break;
      }
      i++;
    }
  }
}
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
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







-
+

-
+

-
+
















-
+





-
+







     && data[i]!='&'
    ){
      i++;
    }
    blob_append(ob, data+beg, i-beg);
    while( i<size ){
      if( data[i]=='<' ){
        BLOB_APPEND_LITERAL(ob, "&lt;");
        blob_append_literal(ob, "&lt;");
      }else if( data[i]=='>' ){
        BLOB_APPEND_LITERAL(ob, "&gt;");
        blob_append_literal(ob, "&gt;");
      }else if( data[i]=='&' ){
        BLOB_APPEND_LITERAL(ob, "&amp;");
        blob_append_literal(ob, "&amp;");
      }else{
        break;
      }
      i++;
    }
  }
}


/* HTML block tags */

/* Size of the prolog: "<div class='markdown'>\n" */
#define PROLOG_SIZE 23

static void html_prolog(struct Blob *ob, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<div class=\"markdown\">\n");
  blob_append_literal(ob, "<div class=\"markdown\">\n");
  assert( blob_size(ob)==PROLOG_SIZE );
}

static void html_epilog(struct Blob *ob, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "</div>\n");
  blob_append_literal(ob, "</div>\n");
}

static void html_blockhtml(struct Blob *ob, struct Blob *text, void *opaque){
  char *data = blob_buffer(text);
  size_t size = blob_size(text);
  Blob *title = ((MarkdownToHtml*)opaque)->output_title;
  while( size>0 && fossil_isspace(data[0]) ){ data++; size--; }
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
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







-
+




-
+

-
+




-
-
-
+
+
+












-
+




-
+





-
+














-
+












-
+

-
+




-
-
-
+
+
+










-
+

-
-
-
+
+
+


-
+


-
+

-
+









-
+

-
+



-
+



-
+



-
+



-
-
+
+

-
+

-
+









-
-
-
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+


+
+
+
+
+
+
+
+
-
+
+















-
-
+
+

-
+






-
+







  ){
    int nTag = html_tag_length(data);
    blob_append(title, data+nTag, size - nTag - 5);
    return;
  }
  INTER_BLOCK(ob);
  blob_append(ob, data, size);
  BLOB_APPEND_LITERAL(ob, "\n");
  blob_append_literal(ob, "\n");
}

static void html_blockcode(struct Blob *ob, struct Blob *text, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<pre><code>");
  blob_append_literal(ob, "<pre><code>");
  html_escape(ob, blob_buffer(text), blob_size(text));
  BLOB_APPEND_LITERAL(ob, "</code></pre>\n");
  blob_append_literal(ob, "</code></pre>\n");
}

static void html_blockquote(struct Blob *ob, struct Blob *text, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<blockquote>\n");
  BLOB_APPEND_BLOB(ob, text);
  BLOB_APPEND_LITERAL(ob, "</blockquote>\n");
  blob_append_literal(ob, "<blockquote>\n");
  blob_appendb(ob, text);
  blob_append_literal(ob, "</blockquote>\n");
}

static void html_header(
  struct Blob *ob,
  struct Blob *text,
  int level,
  void *opaque
){
  struct Blob *title = ((MarkdownToHtml*)opaque)->output_title;
  /* The first header at the beginning of a text is considered as
   * a title and not output. */
  if( blob_size(ob)<=PROLOG_SIZE && title!=0 && blob_size(title)==0 ){
    BLOB_APPEND_BLOB(title, text);
    blob_appendb(title, text);
    return;
  }
  INTER_BLOCK(ob);
  blob_appendf(ob, "<h%d>", level);
  BLOB_APPEND_BLOB(ob, text);
  blob_appendb(ob, text);
  blob_appendf(ob, "</h%d>", level);
}

static void html_hrule(struct Blob *ob, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<hr />\n");
  blob_append_literal(ob, "<hr />\n");
}


static void html_list(
  struct Blob *ob,
  struct Blob *text,
  int flags,
  void *opaque
){
  char ol[] = "ol";
  char ul[] = "ul";
  char *tag = (flags & MKD_LIST_ORDERED) ? ol : ul;
  INTER_BLOCK(ob);
  blob_appendf(ob, "<%s>\n", tag);
  BLOB_APPEND_BLOB(ob, text);
  blob_appendb(ob, text);
  blob_appendf(ob, "</%s>\n", tag);
}

static void html_list_item(
  struct Blob *ob,
  struct Blob *text,
  int flags,
  void *opaque
){
  char *text_data = blob_buffer(text);
  size_t text_size = blob_size(text);
  while( text_size>0 && text_data[text_size-1]=='\n' ) text_size--;
  BLOB_APPEND_LITERAL(ob, "<li>");
  blob_append_literal(ob, "<li>");
  blob_append(ob, text_data, text_size);
  BLOB_APPEND_LITERAL(ob, "</li>\n");
  blob_append_literal(ob, "</li>\n");
}

static void html_paragraph(struct Blob *ob, struct Blob *text, void *opaque){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<p>");
  BLOB_APPEND_BLOB(ob, text);
  BLOB_APPEND_LITERAL(ob, "</p>\n");
  blob_append_literal(ob, "<p>");
  blob_appendb(ob, text);
  blob_append_literal(ob, "</p>\n");
}


static void html_table(
  struct Blob *ob,
  struct Blob *head_row,
  struct Blob *rows,
  void *opaque
){
  INTER_BLOCK(ob);
  BLOB_APPEND_LITERAL(ob, "<table>\n");
  blob_append_literal(ob, "<table>\n");
  if( head_row && blob_size(head_row)>0 ){
    BLOB_APPEND_LITERAL(ob, "<thead>\n");
    BLOB_APPEND_BLOB(ob, head_row);
    BLOB_APPEND_LITERAL(ob, "</thead>\n<tbody>\n");
    blob_append_literal(ob, "<thead>\n");
    blob_appendb(ob, head_row);
    blob_append_literal(ob, "</thead>\n<tbody>\n");
  }
  if( rows ){
    BLOB_APPEND_BLOB(ob, rows);
    blob_appendb(ob, rows);
  }
  if( head_row && blob_size(head_row)>0 ){
    BLOB_APPEND_LITERAL(ob, "</tbody>\n");
    blob_append_literal(ob, "</tbody>\n");
  }
  BLOB_APPEND_LITERAL(ob, "</table>\n");
  blob_append_literal(ob, "</table>\n");
}

static void html_table_cell(
  struct Blob *ob,
  struct Blob *text,
  int flags,
  void *opaque
){
  if( flags & MKD_CELL_HEAD ){
    BLOB_APPEND_LITERAL(ob, "    <th");
    blob_append_literal(ob, "    <th");
  }else{
    BLOB_APPEND_LITERAL(ob, "    <td");
    blob_append_literal(ob, "    <td");
  }
  switch( flags & MKD_CELL_ALIGN_MASK ){
    case MKD_CELL_ALIGN_LEFT: {
      BLOB_APPEND_LITERAL(ob, " align=\"left\"");
      blob_append_literal(ob, " align=\"left\"");
      break;
    }
    case MKD_CELL_ALIGN_RIGHT: {
      BLOB_APPEND_LITERAL(ob, " align=\"right\"");
      blob_append_literal(ob, " align=\"right\"");
      break;
    }
    case MKD_CELL_ALIGN_CENTER: {
      BLOB_APPEND_LITERAL(ob, " align=\"center\"");
      blob_append_literal(ob, " align=\"center\"");
      break;
    }
  }
  BLOB_APPEND_LITERAL(ob, ">");
  BLOB_APPEND_BLOB(ob, text);
  blob_append_literal(ob, ">");
  blob_appendb(ob, text);
  if( flags & MKD_CELL_HEAD ){
    BLOB_APPEND_LITERAL(ob, "</th>\n");
    blob_append_literal(ob, "</th>\n");
  }else{
    BLOB_APPEND_LITERAL(ob, "</td>\n");
    blob_append_literal(ob, "</td>\n");
  }
}

static void html_table_row(
  struct Blob *ob,
  struct Blob *cells,
  int flags,
  void *opaque
){
  BLOB_APPEND_LITERAL(ob, "  <tr>\n");
  BLOB_APPEND_BLOB(ob, cells);
  BLOB_APPEND_LITERAL(ob, "  </tr>\n");
  blob_append_literal(ob, "  <tr>\n");
  blob_appendb(ob, cells);
  blob_append_literal(ob, "  </tr>\n");
}

/*
** Render a token of user provided classes.
** If bHTML is true then render HTML for (presumably) visible text,
** otherwise just a space-separated list of the derived classes.
*/
static void append_footnote_upc(
  struct Blob *ob,
  const struct Blob *upc,  /* token of user-provided classes */
  int bHTML
){
  const char *z = blob_buffer(upc);
  int i, n = blob_size(upc);

  if( n<3 ) return;
  assert( z[0]=='.' && z[n-1] == ':' );
  if( bHTML ){
    blob_append_literal(ob, "<span class='fn-upc'>"
                            "<span class='fn-upcDot'>.</span>");
  }
  n = 0;
  do{
    z++;
    if( *z!='.' && *z!=':' ){
      assert( fossil_isalnum(*z) || *z=='-' );
      n++;
      continue;
    }
    assert( n );
    if(  bHTML ) blob_append_literal(ob, "<span class='");
    blob_append_literal(ob, "fn-upc-");

    for(i=-n; i<0; i++){
      blob_append_char(ob, fossil_tolower(z[i]) );
    }
    if( bHTML ){
      blob_append_literal(ob, "'>");
      blob_append(ob, z-n, n);
      blob_append_literal(ob, "</span>");
    }else{
      blob_append_char(ob, ' ');
    }
    n = 0;
    if( bHTML ){
      if( *z==':' ){
        blob_append_literal(ob,"<span class='fn-upcColon'>:</span>");
      }else{
        blob_append_literal(ob,"<span class='fn-upcDot'>.</span>");
      }
    }
  }while( *z != ':' );
  if( bHTML ) blob_append_literal(ob,"</span>\n");
}

static int html_footnote_ref(
  struct Blob *ob, const struct Blob *span, const struct Blob *upc,
  int iMark, int locus, void *opaque
){
  const struct MarkdownToHtml* ctx = (struct MarkdownToHtml*)opaque;
  const bitfield64_t l = to_base26(locus-1,0);
  char pos[32];
  memset(pos,0,32);
  assert( locus > 0 );
  /* expect BUGs if the following yields compiler warnings */
  if( iMark > 0 ){      /* a regular reference to a footnote */
    sprintf(pos, "%s-%d-%s", ctx->unique.c, iMark, l.c);
    if(span && blob_size(span)) {
      blob_append_literal(ob,"<span class='");
      append_footnote_upc(ob, upc, 0);
      blob_append_literal(ob,"notescope' id='noteref");
      blob_appendf(ob,"%s'>",pos);
      blob_appendb(ob, span);
      blob_trim(ob);
      blob_append_literal(ob,"<sup class='noteref'><a href='");
      BLOB_APPEND_URI(ob, ctx);
      blob_appendf(ob,"#footnote%s'>%d</a></sup></span>", pos, iMark);
    }else{
      blob_trim(ob);
      blob_append_literal(ob,"<sup class='");
      append_footnote_upc(ob, upc, 0);
      blob_append_literal(ob,"noteref'><a href='");
      BLOB_APPEND_URI(ob, ctx);
      blob_appendf(ob,"#footnote%s' id='noteref%s'>%d</a></sup>",
                      pos,           pos,  iMark);
    }
  }else{              /* misreference */
    assert( iMark == -1 );

    sprintf(pos, "%s-%s", ctx->unique.c, l.c);
    if(span && blob_size(span)) {
      blob_appendf(ob, "<span class='notescope' id='misref%s'>", pos);
      blob_appendb(ob, span);
      blob_trim(ob);
      blob_append_literal(ob, "<sup class='noteref misref'><a href='");
      BLOB_APPEND_URI(ob, ctx);
      blob_appendf(ob, "#misreference%s'>misref</a></sup></span>", pos);
    }else{
      blob_trim(ob);
      blob_append_literal(ob, "<sup class='noteref misref'><a href='");
      BLOB_APPEND_URI(ob, ctx);
      blob_appendf(ob, "#misreference%s' id='misref%s'>", pos, pos);
      blob_append_literal(ob, "misref</a></sup>");
    }
  }
  return 1;
}

/* Render a single item of the footnotes list.
 * Each backref gets a unique id to enable dynamic styling. */
static void html_footnote_item(
  struct Blob *ob, const struct Blob *text, int iMark, int nUsed, void *opaque
){
  const struct MarkdownToHtml* ctx = (struct MarkdownToHtml*)opaque;
  const char * const unique = ctx->unique.c;
  assert( nUsed >= 0 );
  /* expect BUGs if the following yields compiler warnings */

  if( iMark < 0 ){                     /* misreferences */
    assert( iMark == -1 );
    assert( nUsed );
    blob_append_literal(ob,"<li class='fn-misreference'>"
                              "<sup class='fn-backrefs'>");
    if( nUsed == 1 ){
      blob_appendf(ob,"<a id='misreference%s-a' href='", unique);
      BLOB_APPEND_URI(ob, ctx);
      blob_appendf(ob,"#misref%s-a'>^</a>", unique);
    }else{
      int i;
      blob_append_char(ob, '^');
      for(i=0; i<nUsed && i<26; i++){
        const int c = i + (unsigned)'a';
        blob_appendf(ob," <a id='misreference%s-%c' href='", unique,c);
        BLOB_APPEND_URI(ob, ctx);
        blob_appendf(ob,"#misref%s-%c'>%c</a>", unique,c, c);
      }
      if( i < nUsed ) blob_append_literal(ob," &hellip;");
    }
    blob_append_literal(ob,"</sup>\n<span>Misreference</span>");
  }else if( iMark > 0 ){  /* regular, joined and overnested footnotes */
    char pos[24];
    int bJoin = 0;
    #define _joined_footnote_indicator "<ul class='fn-joined'>"
    #define _jfi_sz (sizeof(_joined_footnote_indicator)-1)
    /* make.footnote_item() invocations should pass args accordingly */
    const struct Blob *upc = text+1;
    assert( text );
    /* allow blob_size(text)==0 for constructs like  [...](^ [] ())  */
    memset(pos,0,24);
    sprintf(pos, "%s-%d", unique, iMark);
    blob_appendf(ob, "<li id='footnote%s' class='", pos);
    if( nUsed ){
      if( blob_size(text)>=_jfi_sz &&
         !memcmp(blob_buffer(text),_joined_footnote_indicator,_jfi_sz)){
        bJoin = 1;
        blob_append_literal(ob, "fn-joined ");
      }
      append_footnote_upc(ob, upc, 0);
    }else{
      blob_append_literal(ob, "fn-toodeep ");
    }
    if( nUsed <= 1 ){
      blob_append_literal(ob, "fn-monoref'><sup class='fn-backrefs'>");
      blob_appendf(ob,"<a id='footnote%s-a' href='", pos);
      BLOB_APPEND_URI(ob, ctx);
      blob_appendf(ob,"#noteref%s-a'>^</a>", pos);
    }else{
      int i;
      blob_append_literal(ob, "fn-polyref'><sup class='fn-backrefs'>^");
      for(i=0; i<nUsed && i<26; i++){
        const int c = i + (unsigned)'a';
        blob_appendf(ob," <a id='footnote%s-%c' href='", pos,c);
        BLOB_APPEND_URI(ob, ctx);
        blob_appendf(ob,"#noteref%s-%c'>%c</a>", pos,c, c);
      }
      /* It's unlikely that so many backrefs will be usefull */
      /* but maybe for some machine generated documents... */
      for(; i<nUsed && i<676; i++){
        const bitfield64_t l = to_base26(i,0);
        blob_appendf(ob," <a id='footnote%s-%s' href='", pos, l.c);
        BLOB_APPEND_URI(ob, ctx);
        blob_appendf(ob,"#noteref%s-%s'>%s</a>", pos,l.c, l.c);
      }
      if( i < nUsed ) blob_append_literal(ob," &hellip;");
    }
    blob_append_literal(ob,"</sup>\n");
    if( bJoin ){
      blob_append_literal(ob,"<sup class='fn-joined'></sup><ul>");
      blob_append(ob,blob_buffer(text)+_jfi_sz,blob_size(text)-_jfi_sz);
    }else if( nUsed ){
      append_footnote_upc(ob, upc, 1);
      blob_appendb(ob, text);
    }else{
      blob_append_literal(ob,"<i></i>\n"
          "<pre><code class='language-markdown'>");
      if( blob_size(upc) ){
        blob_appendb(ob, upc);
      }
      html_escape(ob, blob_buffer(text), blob_size(text));
      blob_append_literal(ob,"</code></pre>");
    }
    #undef _joined_footnote_indicator
    #undef _jfi_sz
  }else{             /* a footnote was defined but wasn't referenced */
    /* make.footnote_item() invocations should pass args accordingly */
    const struct Blob *id = text-1, *upc = text+1;
    assert( !nUsed );
    assert( text );
    assert( blob_size(text) );
    assert( blob_size(id) );
    blob_append_literal(ob,"<li class='fn-unreferenced'>\n[^&nbsp;<code>");
    html_escape(ob, blob_buffer(id), blob_size(id));
    blob_append_literal(ob, "</code>&nbsp;]<i></i>\n"
        "<pre><code class='language-markdown'>");
    if( blob_size(upc) ){
      blob_appendb(ob, upc);
    }
    html_escape(ob, blob_buffer(text), blob_size(text));
    blob_append_literal(ob,"</code></pre>");
  }
  blob_append_literal(ob, "\n</li>\n");
}

static void html_footnotes(
  struct Blob *ob, const struct Blob *items, void *opaque
){
  if( items && blob_size(items) ){
    blob_append_literal(ob,
      "\n<hr class='footnotes-separator'/>\n<ol class='footnotes'>\n");
    blob_appendb(ob, items);
    blob_append_literal(ob, "</ol>\n");

  }
}

/* HTML span tags */

static int html_raw_html_tag(struct Blob *ob, struct Blob *text, void *opaque){
  blob_append(ob, blob_buffer(text), blob_size(text));
  return 1;
}

static int html_autolink(
  struct Blob *ob,
  struct Blob *link,
  enum mkd_autolink type,
  void *opaque
){
  if( !link || blob_size(link)<=0 ) return 0;
  BLOB_APPEND_LITERAL(ob, "<a href=\"");
  if( type==MKDA_IMPLICIT_EMAIL ) BLOB_APPEND_LITERAL(ob, "mailto:");
  blob_append_literal(ob, "<a href=\"");
  if( type==MKDA_IMPLICIT_EMAIL ) blob_append_literal(ob, "mailto:");
  html_quote(ob, blob_buffer(link), blob_size(link));
  BLOB_APPEND_LITERAL(ob, "\">");
  blob_append_literal(ob, "\">");
  if( type==MKDA_EXPLICIT_EMAIL && blob_size(link)>7 ){
    /* remove "mailto:" from displayed text */
    html_escape(ob, blob_buffer(link)+7, blob_size(link)-7);
  }else{
    html_escape(ob, blob_buffer(link), blob_size(link));
  }
  BLOB_APPEND_LITERAL(ob, "</a>");
  blob_append_literal(ob, "</a>");
  return 1;
}

/*
** The nSrc bytes at zSrc[] are Pikchr input text (allegedly).  Process that
** text and insert the result in place of the original.
*/
420
421
422
423
424
425
426
427

428
429

430
431
432
433
434
435
436
685
686
687
688
689
690
691

692
693

694
695
696
697
698
699
700
701







-
+

-
+







  int nSep,           /* Number of grave accents marks as delimiters */
  void *opaque
){
  if( text==0 ){
    /* no-op */
  }else if( nSep<=2 ){
    /* One or two graves: an in-line code span */
    BLOB_APPEND_LITERAL(ob, "<code>");
    blob_append_literal(ob, "<code>");
    html_escape(ob, blob_buffer(text), blob_size(text));
    BLOB_APPEND_LITERAL(ob, "</code>");
    blob_append_literal(ob, "</code>");
  }else{
    /* Three or more graves: a fenced code block */
    int n = blob_size(text);
    const char *z = blob_buffer(text);
    int i;
    for(i=0; i<n && z[i]!='\n'; i++){}
    if( i>=n ){
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
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







-
-
-
+
+
+









-
-
-
+
+
+










-
+

-
+


-
+


-
+




-
+








static int html_double_emphasis(
  struct Blob *ob,
  struct Blob *text,
  char c,
  void *opaque
){
  BLOB_APPEND_LITERAL(ob, "<strong>");
  BLOB_APPEND_BLOB(ob, text);
  BLOB_APPEND_LITERAL(ob, "</strong>");
  blob_append_literal(ob, "<strong>");
  blob_appendb(ob, text);
  blob_append_literal(ob, "</strong>");
  return 1;
}

static int html_emphasis(
  struct Blob *ob,
  struct Blob *text,
  char c,
  void *opaque
){
  BLOB_APPEND_LITERAL(ob, "<em>");
  BLOB_APPEND_BLOB(ob, text);
  BLOB_APPEND_LITERAL(ob, "</em>");
  blob_append_literal(ob, "<em>");
  blob_appendb(ob, text);
  blob_append_literal(ob, "</em>");
  return 1;
}

static int html_image(
  struct Blob *ob,
  struct Blob *link,
  struct Blob *title,
  struct Blob *alt,
  void *opaque
){
  BLOB_APPEND_LITERAL(ob, "<img src=\"");
  blob_append_literal(ob, "<img src=\"");
  html_quote(ob, blob_buffer(link), blob_size(link));
  BLOB_APPEND_LITERAL(ob, "\" alt=\"");
  blob_append_literal(ob, "\" alt=\"");
  html_quote(ob, blob_buffer(alt), blob_size(alt));
  if( title && blob_size(title)>0 ){
    BLOB_APPEND_LITERAL(ob, "\" title=\"");
    blob_append_literal(ob, "\" title=\"");
    html_quote(ob, blob_buffer(title), blob_size(title));
  }
  BLOB_APPEND_LITERAL(ob, "\" />");
  blob_append_literal(ob, "\" />");
  return 1;
}

static int html_linebreak(struct Blob *ob, void *opaque){
  BLOB_APPEND_LITERAL(ob, "<br />\n");
  blob_append_literal(ob, "<br />\n");
  return 1;
}

static int html_link(
  struct Blob *ob,
  struct Blob *link,
  struct Blob *title,
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
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







-
+

-
+











-
-
-
+
+
+







    static const int flags = 
       WIKI_NOBADLINKS |
       WIKI_MARKDOWNLINKS
    ;
    wiki_resolve_hyperlink(ob, flags, zLink, zClose, sizeof(zClose), 0, zTitle);
  }
  if( blob_size(content)==0 ){
    if( link ) BLOB_APPEND_BLOB(ob, link);
    if( link ) blob_appendb(ob, link);
  }else{
    BLOB_APPEND_BLOB(ob, content);
    blob_appendb(ob, content);
  }
  blob_append(ob, zClose, -1);
  return 1;
}

static int html_triple_emphasis(
  struct Blob *ob,
  struct Blob *text,
  char c,
  void *opaque
){
  BLOB_APPEND_LITERAL(ob, "<strong><em>");
  BLOB_APPEND_BLOB(ob, text);
  BLOB_APPEND_LITERAL(ob, "</em></strong>");
  blob_append_literal(ob, "<strong><em>");
  blob_appendb(ob, text);
  blob_append_literal(ob, "</em></strong>");
  return 1;
}


static void html_normal_text(struct Blob *ob, struct Blob *text, void *opaque){
  html_escape(ob, blob_buffer(text), blob_size(text));
}
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
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







+













+











+









+
+



+
+
+
+
+





  struct Blob *output_title,     /* Put title here.  May be NULL */
  struct Blob *output_body       /* Put document body here. */
){
  struct mkd_renderer html_renderer = {
    /* prolog and epilog */
    html_prolog,
    html_epilog,
    html_footnotes,

    /* block level elements */
    html_blockcode,
    html_blockquote,
    html_blockhtml,
    html_header,
    html_hrule,
    html_list,
    html_list_item,
    html_paragraph,
    html_table,
    html_table_cell,
    html_table_row,
    html_footnote_item,

    /* span level elements */
    html_autolink,
    html_codespan,
    html_double_emphasis,
    html_emphasis,
    html_image,
    html_linebreak,
    html_link,
    html_raw_html_tag,
    html_triple_emphasis,
    html_footnote_ref,

    /* low level elements */
    0,    /* entity */
    html_normal_text,

    /* misc. parameters */
    "*_", /* emph_chars */
    0     /* opaque */
  };
  static int invocation = -1; /* no marker for the first document */
  static const char* zRU = 0; /* REQUEST_URI with escaped quotes  */
  MarkdownToHtml context;
  memset(&context, 0, sizeof(context));
  context.output_title = output_title;
  context.unique = to_base26(invocation++,1);
  if( !zRU ) zRU = escape_quotes(PD("REQUEST_URI",""));
  #ifndef FOOTNOTES_WITHOUT_URI
    blob_set( &context.reqURI, zRU );
  #endif
  html_renderer.opaque = &context;
  if( output_title ) blob_reset(output_title);
  blob_reset(output_body);
  markdown(output_body, input_markdown, &html_renderer);
}

Changes to src/style.c.

780
781
782
783
784
785
786







787
788
789
790
791
792
793
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800







+
+
+
+
+
+
+







  stylesheet_url_var();
  image_url_var("logo");
  image_url_var("background");
  if( !login_is_nobody() ){
    Th_Store("login", g.zLogin);
  }
  Th_MaybeStore("current_feature", feature_from_page_path(local_zCurrentPage) );
  if( g.ftntsIssues[0] || g.ftntsIssues[1] ||
      g.ftntsIssues[2] || g.ftntsIssues[3] ){
    char buf[80];
    sprintf(&buf[0],"%i %i %i %i",g.ftntsIssues[0],g.ftntsIssues[1],
                                  g.ftntsIssues[2],g.ftntsIssues[3]);
    Th_Store("footnotes_issues_counters", buf);
  }
}

/*
** Draw the header.
*/
void style_header(const char *zTitleFormat, ...){
  va_list ap;

Changes to src/wikiformat.c.

1891
1892
1893
1894
1895
1896
1897
1898


1899
1900
1901
1902
1903

1904
1905

1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919










1920
1921
1922
1923
1924
1925
1926
1891
1892
1893
1894
1895
1896
1897

1898
1899
1900
1901
1902
1903

1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938







-
+
+




-
+


+














+
+
+
+
+
+
+
+
+
+







** COMMAND: test-markdown-render
**
** Usage: %fossil test-markdown-render FILE ...
**
** Render markdown in FILE as HTML on stdout.
** Options:
**
**    --safe           Restrict the output to use only "safe" HTML
**    --safe            Restrict the output to use only "safe" HTML
**    --lint-footnotes  Print stats for footnotes-related issues
*/
void test_markdown_render(void){
  Blob in, out;
  int i;
  int bSafe = 0;
  int bSafe = 0, bFnLint = 0;
  db_find_and_open_repository(OPEN_OK_NOT_FOUND|OPEN_SUBSTITUTE,0);
  bSafe = find_option("safe",0,0)!=0;
  bFnLint = find_option("lint-footnotes",0,0)!=0;
  verify_all_options();
  for(i=2; i<g.argc; i++){
    blob_zero(&out);
    blob_read_from_file(&in, g.argv[i], ExtFILE);
    if( g.argc>3 ){
      fossil_print("<!------ %h ------->\n", g.argv[i]);
    }
    markdown_to_html(&in, 0, &out);
    safe_html_context( bSafe ? DOCSRC_UNTRUSTED : DOCSRC_TRUSTED );
    safe_html(&out);
    blob_write_to_file(&out, "-");
    blob_reset(&in);
    blob_reset(&out);
  }
  if( bFnLint && (g.ftntsIssues[0] || g.ftntsIssues[1]
      || g.ftntsIssues[2] || g.ftntsIssues[3] )){
    fossil_fatal("There were issues with footnotes:\n"
                  " %8d misreference%s\n"
                  " %8d unreferenced\n"
                  " %8d splitted\n"
                  " %8d overnested",
                  g.ftntsIssues[0], g.ftntsIssues[0]==1?"":"s",
                  g.ftntsIssues[1], g.ftntsIssues[2], g.ftntsIssues[3]);
  }
}

/*
** Search for a <title>...</title> at the beginning of a wiki page.
** Return true (nonzero) if a title is found.  Return zero if there is
** not title.
**

Added test/markdown-test3.md.



























































































































































































































































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
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+

Markdown Footnotes Test Document
================================

**This document** should help with testing of footnotes support that
is introduced by the ["`markdown-footnotes`"][branch] branch.
It **might look pretty misformatted unless rendered by the proper Fossil
executable** that incorporates the abovementioned branch.[^1]  
That is also a humble attempt to explore the robustness of the Markdown parser.
So please excuse for the mess in the [source code of this document][src].
By no means the normal use of footnotes should look that scarry.

Developers are invited to add test cases here[^here].
It is suggested that the more simple is a test case the earlier it should
appear in this document.[^ if glitch occurs	]


[^lost3]: This note was defined at the begining of the document.

[^duplicate]: This came from the begining of the document.

A footnote's label should be case insensitive[^ case INSENSITIVE ],
it is whitespace-savvy and can even contain newlines.[^ a
multiline
label]

A labeled footnote may be [referenced several times][^many-refs].

A footnote's text should support Markdown [markup][^].  
Markup within [a [text fragment](https://en.wikipedia.org/wiki/Lorem_ipsum)
of a *span-bounded footnote*][^markup] should also be rendered.

Another reference[^many-refs] to the preveously used footnote.

[^lost2]: This note was defined in the middle of the document.
   It references [its previous][^lost3] 
   and [the forthcoming][^lost1] siblings.

[^i am strayed]:
  This should be presented **verbatim** (without any [markup][^])
  in the end of the footnotes.
  
  Default skin renders label in red font and the main text in gray.
  Other styling may also apply.

Inline footnotes are supported.(^These may be usefull for adding
<s>small</s> comments.)

This is a corner case that is rendered as [an empty footnote](^  []  ()).

If [undefined label is used][^] then red "`misref`" is emited instead of
a numeric marker.[^ see it yourself ]
This can be overridden by the skin though.

The refenrence at the end of this sentence is the sole reason of
rendering of <s>`lost1` and</s> [lost2][^].

If several labeled footnote definitions have the same equal label then texts
from all these definitions are joined.[^duplicate]

Several references should be recognized as several distinct numbers.
(^There should be an interval between numbers.) [^many-refs]

If markup is ambigous between a span-bounded footnote and
a "free-standing" footnote followed by another footnote
then interpret as the later case.
This facilitates the usage in the usual case
when several footnotes are refenrenced at the end
of a phrase.[^scipub][^many-refs](^All these four should
be parsed as "free-standing" footnotes)[^Coelurosauria]

A footnote may not be empty(^)
or consist just of blank characters.(^        
              )

The same holds for labeled footnotes. If definition of a labeled footnote
is blank then it is not accepted by the first pass of the parser and
is recognized during the second pass as misreference.
[^ This definition consists of just blanks ]:     
     
     
<style>
  li.fn-upc-example span.fn-upc {
    border: solid 2px lightgreen;
    border-radius: 0.25em;
    padding-left: 2px;
    padding-right: 2px;
    margin-bottom: 0.2em;
  }
  li.fn-upc-example span.fn-upcDot:first-child {
    font-weight: bold;
  }
  sup.noteref.fn-upc-example,
  span.notescope.fn-upc-example sup.noteref {
    border: solid 2px lightgreen;
[^duplicate]:
      Labeled footnote definition may appear anywhere.
      That part came from inside of an inline style definition.
    border-radius: 0.4em;
    padding: 2px;
  }
  sup.noteref.fn-upc-example::after,
  span.notescope.fn-upc-example sup.noteref::after {
    content: " ⛄";
  }
  sup.noteref.fn-upc-example:hover::after,
  span.notescope.fn-upc-example sup.noteref:hover::after {
    content: " 👻";
  }
  li.fn-upc-l span.fn-upc  {
    font-size: 60%;
    color: orange;
  }
  li.fn-upc-l span.fn-upc span.fn-upcDot {
    display: none;
  }
</style>

It is possible to provide a list of classes for a particular footnote and
all its references. This is achieved by prepending a footnote's text with
a special token that starts with dot and ends with colon.
(^
   .alpha-Numeric123.EXAMPLE:
   This token defines a dot-separated list of CSS classes
   which are added to that particular footnote and also to the
   corresponding reference(s). Hypens ('-') are also allowed.
   Classes from the token are tranformed to lowercase and are prepended
   with `"fn-upc-"` to avoid collisions.
)  
This feature is "*opt-in*": there is nothing wrong in starting a footnote's
text with a token of that form while not defining any corresponding classes
in the stylesheet.[^nostyle]
If a footnote consists just of a valid userclass token then this token
is not interpreted as such, instead it is emitted as plain text.
(^  
   .bare.classlist.inside.inline.footnote:  
)[^bare1]
[^bare2]

[^duplicate]: .with.UPC.token:   
   When duplicates are joined their UPC tokens are treated as plain-text.
   Blank characters between token and main text must be preserved.

<html>
  Click
  <a href="?a=B&quote='&nonASCII=😂&script=<script>alert('Broken!');</script>">
  here</a> and
  <a href='?a=B&quote="&nonASCII=😂&script=<script>alert("Broken!");</script>'>
  here</a>
  to test escaping of REQUEST_URI in the generated footnote markers.
</html>

A depth of nesting must be limited.
(^
 .L.1: A long chain of nested inline footnotes...
 (^
  .L.2: is a rather unusual thing...
  (^
   .L.3: and requires extra CPU cycles for processing.
   (^
    .L.4: Theoretically speaking O(n<sup>2</sup>).
    (^
     .L.5: Thus it is worth dismissing those footnotes...
     (^
      .L.6: that are nested deeper than on a certain level.
      (^
       .L.7: A particular value for that limit...
       (^
        is hard-coded in src/markdown.c ...
        (^
         in function `markdown()` ...
         (^
          in variable named `maxDepth`.
          (^
           For the time being, its value is **5**
          )
         )
        )
       )
      )
     )
    )
   )
  )
 )
)

## Footnotes

[branch]: /timeline?r=markdown-footnotes&nowiki

[^ 1]:  Footnotes is a Fossil' extention of
        Markdown. Your other tools may have limited support for these.

[^here]: [History of test/markdown-test3.md](/finfo/test/markdown-test3.md)

[src]: /file/test/markdown-test3.md?ci=markdown-footnotes&txt&ln

[^if glitch occurs]:
        So that simple cases are processed even if
        a glitch happens for more tricky cases.

[^	CASE	 insensitive  	]: And also tolerate whitespaces.

[^ a multiline label ]: But at a footnote's definition it should still
    be written within square brackets
             on a single line.

[^duplicate]: And that came from the end of the document.

[^many-refs]:
   Each letter on the left is a back-reference to the place of use.
   Highlighted back-reference indicates a place from which navigation
   occurred[^lost1].

[^lost1]: This note was defined at the end of the document.
   It defines an inline note.
   
   (^This is inline note defined inside of [a labeled note][^lost1].)

[^markup]:   E.g. *emphasis*, and [so on](/md_rules).
   BTW, this note may not have a backreference to the "stray".

[^undefined label is used]: For example due to a typo.

[^another stray]: Just to verify the correctness of ordering and styling.

[^scipub]: Which is common in the scientific publications.

[^bare1]:  .at.the.1st.line.of.labeled.footnote.definition:
     

[^bare2]:  
           .at.the.2nd.line.of.labeled.footnote.definition:
           
[^stray with UPC]: .UPC-token:
    A token of user-provided classes must be rendered within strays.
    Aslo: this and the previous line may not have extra indentation.

[^nostyle]:
  .unused.classes:
  In that case text of the footnote just looks like as if
  no special processing occured.


[^ <script>alert("You have been pwned!");</script> ]: Labels are escaped

[^ <textarea>"Last words here...' ]:
  <textarea>Content is also escaped</textarea>