Usually bin and include are the same, but for instance lib may want to be
lib64 on Red Hat distros. Add BINDIR, LIBDIR, and INCLUDEDIR variables
that can be overridden on the command line.
This commit also tweaks the way the libraries are installed, dropping
execute privileges on libhoedown.a, and making sure libhoedown.so is
installed as a symlink. (The install command doesn't preserve symlinks.)
Most of the CFLAGS options can reasonably be changed at will, but a few
are necessary. Move those few into HOEDOWN_CFLAGS, so the rest can be
overridden, e.g. by distro policy.
`find_emph_char` returns 0 if the char specified is not found in the
current line, but this is also what happens when there's an empty
cell. This patch adds logic to work around this problem.
See uranusjr/macdown#321
When the `HOEDOWN_EXT_UNDERLINE` extension was enabled, underlined spans
would actually be passed verbatim to the output buffer. This was because
the active_char was _only_ set when the emphasis, double_emphasis, or
triple_emphasis handlers were registered. As a result, no active char
was found in the input buffer, so everything was passed through
verbatim.
This patch fixes this by also registering the `active_char` if the
underline handler is registered. I also added a simple regression test.
I personally don't use this extension, but I encountered this bug over
the course of writing bindings for Rust.
The loop performs two jobs: Find the first tabstop, and counting the number of
characters before it. To count the number of characters before the
tabstop, it counts all bytes that are not UTF-8 continuation bytes.
The current form of the loop doesn't check the first character, but
checks the character past the range's end. Since these are both
usually non-continuation characters, it does the right thing accidentally.
However, it accesses the character range at index `size`, which is
forbidden and might be uninitialized for strings that are not
null-terminated.
Before this patch, a header like "# *A*" was displayed as
"<li><em>A</em></li>" in the TOC. The error was caused by
toc_header doing the HTML escaping. In the normal HTML renderer, the escaping
is done by the normal_text hook. This patch uses the same handling to
fix the issue.
