Hash :
3e5d64bf
Author :
Date :
2020-05-29T10:42:38
Changes:
New features:
The HTML renderer, developed originally as the heart of the md2html
utility, is now built as a standalone library, in order to simplify its
reuse in applications.
With MD_HTML_FLAG_SKIP_UTF8_BOM
, the HTML renderer now skips UTF-8 byte
order mark (BOM) if the input begins with it, before passing to the Markdown
parser.
md2html
utility automatically enables the flag (unless it is custom-built
with -DMD4C_USE_ASCII
).
With MD_HTML_FLAG_XHTML
, The HTML renderer generates XHTML instead of
HTML.
This effectively means <br />
instead of <br>
, <hr />
instead of
<hr>
, and <img ... />
instead of <img ...>
.
md2html
utility now understands the flag -x
or --xhtml
to enable
the XHTML mode.
Fixes:
#113:
Add missing folding info data for the following Unicode characters:
U+0184
, U+018a
, U+01b2
, U+01b5
, U+01f4
, U+0372
, U+038f
,
U+1c84
, U+1fb9
, U+1fbb
, U+1fd9
, U+1fdb
, U+1fe9
, U+1feb
,
U+1ff9
, U+1ffb
, U+2c7f
, U+2ced
, U+a77b
, U+a792
, U+a7c9
.
Due the bug, the link definition label matching did not work in the case insensitive way for these characters.
New features:
MD_FLAG_UNDERLINE
, spans enclosed in underscore (_foo_
) are seen
as underline (MD_SPAN_UNDERLINE
) rather then an ordinary emphasis or
strong emphasis. Changes:
The implementation of wiki-links extension (with MD_FLAG_WIKILINKS
) has
been simplified.
Recognition of strike-through spans (with the flag MD_FLAG_STRIKETHROUGH
)
has become much stricter and, arguably, reasonable.
~
) and double tildes (~~
) are recognized as
strike-through marks. Longer ones are not anymore. This change follows the changes of behavior in cmark-gfm some time ago, so it is also beneficial from compatibility point of view.
When building MD4C by hand instead of using its CMake-based build, the UTF-8
support was by default disabled, unless explicitly asked for by defining
a preprocessor macro MD4C_USE_UTF8
.
This has been changed and the UTF-8 mode now becomes the default, no matter
how md4c.c
is compiled. If you need to disable it and use the ASCII-only
mode, you have explicitly define macro MD4C_USE_ASCII
when compiling it.
(The CMake-based build as provided in our repository explicitly asked for
the UTF-8 support with -DMD4C_USE_UTF8
. I.e. if you are using MD4C library
built with our vanilla CMakeLists.txt
files, this change should not affect
you.)
Fixes:
Fixed some string length handling in the special MD4C_USE_UTF16
build.
(This does not affect you unless you are on Windows and explicitly define the macro when building MD4C.)
#100: Fixed an off-by-one error in the maximal length limit of some segments of e-mail addresses used in autolinks.
#107:
Fix mis-detection of asterisk-encoded emphasis in some corner cases when
length of the opener and closer differs, as in ***foo *bar baz***
.
Fixes:
**a *b c** d*
. Unfortunately, 0.4.0 has been released with badly updated ChangeLog. Fixing this is the only change on 0.4.1.
New features:
With MD_FLAG_LATEXMATHSPANS
, LaTeX math spans ($...$
) and LaTeX display
math spans ($$...$$
) are now recognized. (Note though that the HTML
renderer outputs them verbatim in a custom <x-equation>
tag.)
Contributed by Tilman Roeder.
With MD_FLAG_WIKILINKS
, Wiki-style links ([[...]]
) are now recognized.
(Note though that the HTML renderer renders them as a custom <x-wikilink>
tag.)
Contributed by Nils Blomqvist.
Changes:
Parsing of tables (with MD_FLAG_TABLES
) is now closer to the way how
cmark-gfm parses tables as we do not require every row of the table to
contain a pipe |
anymore.
As a consequence, paragraphs now cannot interrupt tables. A paragraph which follows the table has to be delimited with a blank line.
Fixes:
#94:
md_build_ref_def_hashtable()
: Do not allocate more memory then strictly
needed.
#95:
md_is_container_mark()
: Ordered list mark requires at least one digit.
#96: Some fixes for link label comparison.
Changes:
Make Unicode-specific code compliant to Unicode 12.1.
Structure MD_BLOCK_CODE_DETAIL
got new member fenced_char
. Application
can use it to detect character used to form the block fences (`
or
~
). In the case of indented code block, it is set to zero.
Fixes:
#77: Fix maximal count of digits for numerical character references, as requested by CommonMark specification 0.29.
#78:
Fix link reference definition label matching for Unicode characters where
the folding mapping leads to multiple codepoints, as e.g. in ẞ
-> SS
.
#83: Fix recognition of an empty blockquote which interrupts a paragraph.
Changes:
Make permissive URL autolink and permissive WWW autolink extensions stricter.
This brings the behavior closer to GFM and mitigates risk of false positives.
In particular, the domain has to contain at least one dot and parenthesis
can be part of the link destination only if (
and )
are balanced.
Fixes:
#73: Some raw HTML inputs could lead to quadratic parsing times.
#74: Fix input leading to a crash. Found by fuzzing.
#76: Fix handling of parenthesis in some corner cases of permissive URL autolink and permissive WWW autolink extensions.
Changes:
Changes mandated by CommonMark specification 0.29.
Most importantly, the white-space trimming rules for code spans have changed. At most one space/newline is trimmed from beginning/end of the code span (if the code span contains some non-space contents, and if it begins and ends with space at the same time). In all other cases the spaces in the code span are now left intact.
Other changes in behavior are in corner cases only. Refer to CommonMark 0.29 notes for more info.
Fixes:
#68: Some specific HTML blocks were not recognized when EOF follows without any end-of-line character.
#69: Strike-through span not working correctly when its opener mark is directly followed by other opener mark; or when other closer mark directly precedes its closer mark.
Fixes:
#58, #59, #60, #63, #66: Some inputs could lead to quadratic parsing times. Thanks to Anders Kaseorg for finding all those issues.
#61:
Flag MD_FLAG_NOHTMLSPANS
erroneously affected also recognition of
CommonMark autolinks.
New features:
Add extension for GitHub-style task lists:
* [x] foo
* [x] bar
* [ ] baz
(It has to be explicitly enabled with MD_FLAG_TASKLISTS
.)
Added support for building as a shared library. On non-Windows platforms,
this is now default behavior; on Windows static library is still the default.
The CMake option BUILD_SHARED_LIBS
can be used to request one or the other
explicitly.
Contributed by Lisandro Damián Nicanor Pérez Meyer.
Renamed structure MD_RENDERER
to MD_PARSER
and refactorize its contents
a little bit. Note this is source-level incompatible and initialization code
in apps may need to be updated.
The aim of the change is to be more friendly for long-term ABI compatibility we shall maintain, starting with this release.
Added CHANGELOG.md
(this file).
Make sure md_process_table_row()
reports the same count of table cells for
all table rows, no matter how broken the input is. The cell count is derived
from table underline line. Bogus cells in other rows are silently ignored.
Missing cells in other rows are reported as empty ones.
Fixes:
CID 1475544:
Calling md_free_attribute()
on uninitialized data.
#47:
Using bad offsets in md_is_entity_str()
, in some cases leading to buffer
overflow.
#51:
Segfault in md_process_table_cell()
.
#53:
With MD_FLAG_PERMISSIVEURLAUTOLINKS
or MD_FLAG_PERMISSIVEWWWAUTOLINKS
we could generate bad output for ordinary Markdown links, if a non-space
character immediately follows like e.g. in [link](http://github.com)X
.
This was the last version before the changelog has been added.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308
# MD4C Change Log
## Next Version (Work in Progress)
Changes:
* Make Unicode-specific code compliant to Unicode 13.0.
New features:
* The HTML renderer, developed originally as the heart of the `md2html`
utility, is now built as a standalone library, in order to simplify its
reuse in applications.
* With `MD_HTML_FLAG_SKIP_UTF8_BOM`, the HTML renderer now skips UTF-8 byte
order mark (BOM) if the input begins with it, before passing to the Markdown
parser.
`md2html` utility automatically enables the flag (unless it is custom-built
with `-DMD4C_USE_ASCII`).
* With `MD_HTML_FLAG_XHTML`, The HTML renderer generates XHTML instead of
HTML.
This effectively means `<br />` instead of `<br>`, `<hr />` instead of
`<hr>`, and `<img ... />` instead of `<img ...>`.
* `md2html` utility now understands the flag `-x` or `--xhtml` to enable
the XHTML mode.
Fixes:
* [#113](https://github.com/mity/md4c/issues/113):
Add missing folding info data for the following Unicode characters:
`U+0184`, `U+018a`, `U+01b2`, `U+01b5`, `U+01f4`, `U+0372`, `U+038f`,
`U+1c84`, `U+1fb9`, `U+1fbb`, `U+1fd9`, `U+1fdb`, `U+1fe9`, `U+1feb`,
`U+1ff9`, `U+1ffb`, `U+2c7f`, `U+2ced`, `U+a77b`, `U+a792`, `U+a7c9`.
Due the bug, the link definition label matching did not work in the case
insensitive way for these characters.
## Version 0.4.3
New features:
* With `MD_FLAG_UNDERLINE`, spans enclosed in underscore (`_foo_`) are seen
as underline (`MD_SPAN_UNDERLINE`) rather then an ordinary emphasis or
strong emphasis.
Changes:
* The implementation of wiki-links extension (with `MD_FLAG_WIKILINKS`) has
been simplified.
- A noticeable increase of MD4C's memory footprint introduced by the
extension implementation in 0.4.0 has been removed.
- The priority handling towards other inline elements have been unified.
(This affects an obscure case where syntax of an image was in place of
wiki-link destination made the wiki-link invalid. Now *all* inline spans
in the wiki-link destination, including the images, is suppressed.)
- The length limitation of 100 characters now always applies to wiki-link
destination.
* Recognition of strike-through spans (with the flag `MD_FLAG_STRIKETHROUGH`)
has become much stricter and, arguably, reasonable.
- Only single tildes (`~`) and double tildes (`~~`) are recognized as
strike-through marks. Longer ones are not anymore.
- The length of the opener and closer marks have to be the same.
- The tildes cannot open a strike-through span if a whitespace follows.
- The tildes cannot close a strike-through span if a whitespace precedes.
This change follows the changes of behavior in cmark-gfm some time ago, so
it is also beneficial from compatibility point of view.
* When building MD4C by hand instead of using its CMake-based build, the UTF-8
support was by default disabled, unless explicitly asked for by defining
a preprocessor macro `MD4C_USE_UTF8`.
This has been changed and the UTF-8 mode now becomes the default, no matter
how `md4c.c` is compiled. If you need to disable it and use the ASCII-only
mode, you have explicitly define macro `MD4C_USE_ASCII` when compiling it.
(The CMake-based build as provided in our repository explicitly asked for
the UTF-8 support with `-DMD4C_USE_UTF8`. I.e. if you are using MD4C library
built with our vanilla `CMakeLists.txt` files, this change should not affect
you.)
Fixes:
* Fixed some string length handling in the special `MD4C_USE_UTF16` build.
(This does not affect you unless you are on Windows and explicitly define
the macro when building MD4C.)
* [#100](https://github.com/mity/md4c/issues/100):
Fixed an off-by-one error in the maximal length limit of some segments
of e-mail addresses used in autolinks.
* [#107](https://github.com/mity/md4c/issues/107):
Fix mis-detection of asterisk-encoded emphasis in some corner cases when
length of the opener and closer differs, as in `***foo *bar baz***`.
## Version 0.4.2
Fixes:
* [#98](https://github.com/mity/md4c/issues/98):
Fix mis-detection of asterisk-encoded emphasis in some corner cases when
length of the opener and closer differs, as in `**a *b c** d*`.
## Version 0.4.1
Unfortunately, 0.4.0 has been released with badly updated ChangeLog. Fixing
this is the only change on 0.4.1.
## Version 0.4.0
New features:
* With `MD_FLAG_LATEXMATHSPANS`, LaTeX math spans (`$...$`) and LaTeX display
math spans (`$$...$$`) are now recognized. (Note though that the HTML
renderer outputs them verbatim in a custom `<x-equation>` tag.)
Contributed by [Tilman Roeder](https://github.com/dyedgreen).
* With `MD_FLAG_WIKILINKS`, Wiki-style links (`[[...]]`) are now recognized.
(Note though that the HTML renderer renders them as a custom `<x-wikilink>`
tag.)
Contributed by [Nils Blomqvist](https://github.com/niblo).
Changes:
* Parsing of tables (with `MD_FLAG_TABLES`) is now closer to the way how
cmark-gfm parses tables as we do not require every row of the table to
contain a pipe `|` anymore.
As a consequence, paragraphs now cannot interrupt tables. A paragraph which
follows the table has to be delimited with a blank line.
Fixes:
* [#94](https://github.com/mity/md4c/issues/94):
`md_build_ref_def_hashtable()`: Do not allocate more memory then strictly
needed.
* [#95](https://github.com/mity/md4c/issues/95):
`md_is_container_mark()`: Ordered list mark requires at least one digit.
* [#96](https://github.com/mity/md4c/issues/96):
Some fixes for link label comparison.
## Version 0.3.4
Changes:
* Make Unicode-specific code compliant to Unicode 12.1.
* Structure `MD_BLOCK_CODE_DETAIL` got new member `fenced_char`. Application
can use it to detect character used to form the block fences (`` ` `` or
`~`). In the case of indented code block, it is set to zero.
Fixes:
* [#77](https://github.com/mity/md4c/issues/77):
Fix maximal count of digits for numerical character references, as requested
by CommonMark specification 0.29.
* [#78](https://github.com/mity/md4c/issues/78):
Fix link reference definition label matching for Unicode characters where
the folding mapping leads to multiple codepoints, as e.g. in `ẞ` -> `SS`.
* [#83](https://github.com/mity/md4c/issues/83):
Fix recognition of an empty blockquote which interrupts a paragraph.
## Version 0.3.3
Changes:
* Make permissive URL autolink and permissive WWW autolink extensions stricter.
This brings the behavior closer to GFM and mitigates risk of false positives.
In particular, the domain has to contain at least one dot and parenthesis
can be part of the link destination only if `(` and `)` are balanced.
Fixes:
* [#73](https://github.com/mity/md4c/issues/73):
Some raw HTML inputs could lead to quadratic parsing times.
* [#74](https://github.com/mity/md4c/issues/74):
Fix input leading to a crash. Found by fuzzing.
* [#76](https://github.com/mity/md4c/issues/76):
Fix handling of parenthesis in some corner cases of permissive URL autolink
and permissive WWW autolink extensions.
## Version 0.3.2
Changes:
* Changes mandated by CommonMark specification 0.29.
Most importantly, the white-space trimming rules for code spans have changed.
At most one space/newline is trimmed from beginning/end of the code span
(if the code span contains some non-space contents, and if it begins and
ends with space at the same time). In all other cases the spaces in the code
span are now left intact.
Other changes in behavior are in corner cases only. Refer to [CommonMark
0.29 notes](https://github.com/commonmark/commonmark-spec/releases/tag/0.29)
for more info.
Fixes:
* [#68](https://github.com/mity/md4c/issues/68):
Some specific HTML blocks were not recognized when EOF follows without any
end-of-line character.
* [#69](https://github.com/mity/md4c/issues/69):
Strike-through span not working correctly when its opener mark is directly
followed by other opener mark; or when other closer mark directly precedes
its closer mark.
## Version 0.3.1
Fixes:
* [#58](https://github.com/mity/md4c/issues/58),
[#59](https://github.com/mity/md4c/issues/59),
[#60](https://github.com/mity/md4c/issues/60),
[#63](https://github.com/mity/md4c/issues/63),
[#66](https://github.com/mity/md4c/issues/66):
Some inputs could lead to quadratic parsing times. Thanks to Anders Kaseorg
for finding all those issues.
* [#61](https://github.com/mity/md4c/issues/59):
Flag `MD_FLAG_NOHTMLSPANS` erroneously affected also recognition of
CommonMark autolinks.
## Version 0.3.0
New features:
* Add extension for GitHub-style task lists:
```
* [x] foo
* [x] bar
* [ ] baz
```
(It has to be explicitly enabled with `MD_FLAG_TASKLISTS`.)
* Added support for building as a shared library. On non-Windows platforms,
this is now default behavior; on Windows static library is still the default.
The CMake option `BUILD_SHARED_LIBS` can be used to request one or the other
explicitly.
Contributed by Lisandro Damián Nicanor Pérez Meyer.
* Renamed structure `MD_RENDERER` to `MD_PARSER` and refactorize its contents
a little bit. Note this is source-level incompatible and initialization code
in apps may need to be updated.
The aim of the change is to be more friendly for long-term ABI compatibility
we shall maintain, starting with this release.
* Added `CHANGELOG.md` (this file).
* Make sure `md_process_table_row()` reports the same count of table cells for
all table rows, no matter how broken the input is. The cell count is derived
from table underline line. Bogus cells in other rows are silently ignored.
Missing cells in other rows are reported as empty ones.
Fixes:
* CID 1475544:
Calling `md_free_attribute()` on uninitialized data.
* [#47](https://github.com/mity/md4c/issues/47):
Using bad offsets in `md_is_entity_str()`, in some cases leading to buffer
overflow.
* [#51](https://github.com/mity/md4c/issues/51):
Segfault in `md_process_table_cell()`.
* [#53](https://github.com/mity/md4c/issues/53):
With `MD_FLAG_PERMISSIVEURLAUTOLINKS` or `MD_FLAG_PERMISSIVEWWWAUTOLINKS`
we could generate bad output for ordinary Markdown links, if a non-space
character immediately follows like e.g. in `[link](http://github.com)X`.
## Version 0.2.7
This was the last version before the changelog has been added.