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message: Fix PVS/V547: c is never equal to KS_ZERO

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Since `c` there is a result of evaluating `TO_SPECIAL` macros it may be only one 
of the following three things:

1. K_SPECIAL
2. K_ZERO (note: not KS_ZERO)
3. negative integer resulting from evaluating TERMCAP2KEY macro.

All variants here are negative and thus fail next !IS_SPECIAL(c) check (negative 
is special). If `c` was really NUL it would fall into the `!IS_SPECIAL(c)` block 
and use whatever character is third in `<80>{a}{b}` combo. For `<Nul>` it is 
X (`<80><ff>X`).
This commit is contained in:
ZyX
2018-04-15 21:32:26 +03:00
parent cb3230776e
commit 3b32e717d9
1 changed files with 1 additions and 4 deletions
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5
src/nvim/message.c
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@@ -1382,9 +1382,6 @@ const char *str2special(const char **const sp, const bool replace_spaces,
if (c == K_SPECIAL && str[1] != NUL && str[2] != NUL) {
c = TO_SPECIAL((uint8_t)str[1], (uint8_t)str[2]);
str += 2;
if (c == KS_ZERO) { // display <Nul> as ^@ or <Nul>
c = NUL;
}
}
if (IS_SPECIAL(c) || modifiers) { // Special key.
special = true;
@@ -1415,7 +1412,7 @@ const char *str2special(const char **const sp, const bool replace_spaces,
|| (replace_lt && c == '<')) {
return (const char *)get_special_key_name(c, modifiers);
}
buf[0] = c;
buf[0] = (char)c;
buf[1] = NUL;
return buf;
}