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Fix for crash in kill-whole-line

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Fixes #1548
This commit is contained in:
ridiculousfish 2014-07-13 14:05:52 -07:00
parent 495adee269
commit 891f55b2b3
1 changed files with 21 additions and 22 deletions
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43
reader.cpp
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@ -3383,34 +3383,33 @@ const wchar_t *reader_readline(void)
case R_KILL_WHOLE_LINE:
{
/* We match the emacs behavior here: "kills the entire line including the following newline" */
editable_line_t *el = data->active_edit_line();
const wchar_t *buff = el->text.c_str();
const wchar_t *end = &buff[el->position];
const wchar_t *begin = end;
size_t len;
while (begin > buff && *begin != L'\n')
begin--;
if (*begin == L'\n')
begin++;
len = maxi<size_t>(end-begin, 0);
begin = end - len;
while (*end && *end != L'\n')
end++;
if (begin == end && *end)
end++;
len = end-begin;
if (len)
/* Back up to the character just past the previous newline, or go to the beginning of the command line. Note that if the position is on a newline, visually this looks like the cursor is at the end of a line. Therefore that newline is NOT the beginning of a line; this justifies the -1 check. */
size_t begin = el->position;
while (begin > 0 && buff[begin-1] != L'\n')
{
reader_kill(el, begin - buff, len, KILL_APPEND, last_char!=R_KILL_WHOLE_LINE);
begin--;
}
/* Push end forwards to just past the next newline, or just past the last char. */
size_t end = el->position;
while (buff[end] != L'\0')
{
end++;
if (buff[end-1] == L'\n')
{
break;
}
}
assert(end >= begin);
if (end > begin)
{
reader_kill(el, begin, end - begin, KILL_APPEND, last_char!=R_KILL_WHOLE_LINE);
}
break;
}