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Closes #59.
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This caused certain NULLs not to be replaced.
Found my 'make fuzztest'.
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Note that our current procedure for removing nulls is not
working properly.
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Also tools/make_entities_h.py -> tools/make_entitis_inc.py.
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Also command line option `--validate-utf8`.
This option causes cmark to check for valid UTF-8,
replacing invalid sequences with the replacement
character, U+FFFD.
Reinstated api tests for utf8.
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Use S_is_line_end_char.
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This gives bad results in parsing reference links,
where we might have trailing blanks.
(finalize in blocks.c removes the bytes parsed as
a reference definition; before this change, some
blank bytes might remain on the line.)
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We now replace null characters in the line splitting code.
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Now it just replaces bad UTF-8 sequences and NULLs.
This restores benchmarks to near their previous levels.
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We no longer preprocess tabs to spaces before parsing.
Instead, we keep track of both the byte offset and
the (virtual) column as we parse block starts.
This allows us to handle tabs without converting
to spaces first. Tabs are left as tabs in the output.
Added `column` and `first_nonspace_column` fields to `parser`.
Added utility function to advance the offset, computing
the virtual column too.
Note that we don't need to deal with UTF-8 here at all.
Only ASCII occurs in block starts.
Significant performance improvement due to the fact that
we're not doing UTF-8 validation -- though we might want
to add that back in.
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We dispense with the hashes and just do string comparsions.
Since the array is in order, we can search intelligently
and should never need to do more than 8 or so comparisons.
This reduces binary size even further, at a small cost
in performance. (This shouldn't matter too much, as
it's only detectable in really entity-heavy sources.)
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We now use -1 instead of 0 to indicate leaf nodes.
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The primary advantage is a big reduction in the size of
the compiled library and executable (> 100K).
There should be no measurable performance difference in
normal documents. I detected a slight performance
hit (around 5%) in a file containing 1,000,000 entities.
* Removed `src/html_unescape.gperf` and `src/html_unescape.h`.
* Added `src/entities.h` (generated by `tools/make_entities_h.py`).
* Added binary tree lookup functions to `houdini_html_u.c`, and
use the data in `src/entities.h`.
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```
[ref]: url
"title" ok
```
Here we should parse the first line as a reference.
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See jgm/commonmark#45.
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The old one had many errors.
The new one is derived from the list in the npm entities package.
Since the sequences can now be longer (multi-code-point), we
have bumped the length limit from 4 to 8, which also affects
houdini_html_u.c.
An example of the kind of error that was fixed in given
in jgm/commonmark.js#47: `≧̸` should be rendered as "≧̸" (U+02267
U+00338), but it's actually rendered as "≧" (which is the same as
`≧`).
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This isn't actually needed.
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Now we have an array of pointers (`potential_openers`),
keyed to the delim char.
When we've failed to match a potential opener prior to point X
in the delimiter stack, we reset `potential_openers` for that opener
type to X, and thus avoid having to look again through all the openers
we've already rejected.
See jgm/commonmark#43.
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When they have no matching openers and cannot be openers themselves,
we can safely remove them.
This helps with a performance case: "a_ " * 20000.
See jgm/commonmark.js#43.
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This reverts commit 54d1249c2caebf45a24d691dc765fb93c9a5e594, reversing
changes made to bc14d869323650e936c7143dcf941b28ccd5b57d.
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Assume a multi-byte sequence and rework switch statement into if/else
for another 2% speedup.
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Speeds up "make bench" by another percent.
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Handle valid UTF-8 chars inside the main loop and avoid a call to
strbuf_put for every UTF-8 char.
Results in a 8% speedup in the UTF-8-heavy "make bench" on my system.
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Guard against too large chunks passed via the API.
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There are probably a couple of places I missed. But this will only
be a problem if we use a 64-bit bufsize_t at some point. Then, we'll
get warnings from -Wshorten-64-to-32.
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This function was missing a couple of range checks that I'm too lazy
to fix.
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Avoid potential overflow and allow for different bufsize types.
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Replace macro ENSURE_SIZE with inline function S_strbuf_grow_by that
checks for overflow.
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cmark_strbuf_grow will never truncate a buffer.
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This simplifies overflow checks.
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Always add 50% on top of target size. No need for a loop.
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This makes it easier to change the type later.
No functional change. The rest of the code base still has to be
adjusted to use the new type.
Also add some TODO comments in buffer.c.
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