It appears that transchar() was working under assumption that
`transchar_nonprint()` may be used for multibyte characters while its
documentation stated exact opposite. It was not actually untrue though, except
that longer buffer would be needed then the one stated in documentation. But it
is false now with assert().
Problem: Ubsan reports errors for integer overflow.
Solution: Define macros for minimum and maximum values. Select an
expression based on the value. (Mike Williams)
7a40ea2138
Based on comments it appears that some non-printable characters intended to be
shown as `|x` (0xA0..0xFE) and some as `~x` (0x80..0x9F, 0xFF, excluding
previous). But this never happens because this is being catched by condition `c
>= 0x80` above which makes them be represented as `<A0>`. Since I find this
variant more useful and it additionally is backwards compatible (Vim does the
same thing) I just dropped dead branches.
Problem: When virtcol() gets a column that is not the first byte of a
multi-byte character the result is unpredictable. (Christian
Ludwig)
Solution: Correct the column to the first byte of a multi-byte character.
Change the utf-8 test to new style.
0c0590d982Closes#6269
Problem: Asan detects a memory error when EXITFREE is defined. (Dominique
Pelle)
Solution: In getvcol() check for ml_get_buf() returning an empty string.
Also skip adjusting the scroll position. Set "exiting" in
mch_exit() for all systems.
955f198fc5
Eliminate mb_init():
Set "enc_utf" and "has_mbyte" early. Eliminate "enc_unicode" and "enc_latin1like".
init_chartab() and screenalloc() are already invoked elsewhere
in the initialization process.
The EncodingChanged autocmd cannot be triggered.
At initialization, there is no spellfiles to reload
Closes#5449
A file containing the string "vim" followed by a very large number in a modeline
location will trigger an overflow in getdigits() which is called by
chk_modeline() when trying to parse the version number.
Add getdigits_safe(), which does not assert overflows, but reports them to the
caller.
move `call_shell` to misc1.c
Move some fns to state.c
Move some fns to option.c
Move some fns to memline.c
Move `vim_chdir*` fns to file_search.c
Move some fns to new module, bytes.c
Move some fns to fileio.c
strtoimax is only required to set errno if there is an
underflow/overflow. In those conditions, strtoimax returns
INTMAX_MIN/INTMAX_MAX respectively, so that's the only time we should be
checking the value of errno.
Even in those conditions, errno needs to be set to a known good value
before calling strtoimax to differentiate between "value is actually
INTMAX_MAX/MIN" and "value over/underflows".
Closes#5279
Reasons:
- One does not have to do `s[len] = NUL` to work with these functions if they do
not need to replace the whole string: thus `s` may be const.
- One does not have to save/restore p_cpo to work with them.
