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search: filter out non-printable characters

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Don’t allow non-printable characters in the search input string.
This commit is contained in:
Daniel Eklöf 2021-01-24 11:32:45 +01:00
parent e7b8f95af7
commit cbf90d67a2
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GPG key ID: 5BBD4992C116573F
1 changed files with 16 additions and 4 deletions
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20
search.c
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@ -354,14 +354,28 @@ search_find_next(struct terminal *term)
void
search_add_chars(struct terminal *term, const char *src, size_t count)
{
const char *_src = src;
mbstate_t ps = {0};
size_t wchars = mbsnrtowcs(NULL, &src, count, 0, &ps);
size_t wchars = mbsnrtowcs(NULL, &_src, count, 0, &ps);
if (wchars == -1) {
LOG_ERRNO("failed to convert %.*s to wchars", (int)count, src);
return;
}
_src = src;
ps = (mbstate_t){0};
wchar_t wcs[wchars + 1];
mbsnrtowcs(wcs, &_src, count, wchars, &ps);
/* Strip non-printable characters */
for (size_t i = 0, j = 0, orig_wchars = wchars; i < orig_wchars; i++) {
if (iswprint(wcs[i]))
wcs[j++] = wcs[i];
else
wchars--;
}
if (!search_ensure_size(term, term->search.len + wchars))
return;
@ -371,9 +385,7 @@ search_add_chars(struct terminal *term, const char *src, size_t count)
&term->search.buf[term->search.cursor],
(term->search.len - term->search.cursor) * sizeof(wchar_t));
memset(&ps, 0, sizeof(ps));
mbsnrtowcs(&term->search.buf[term->search.cursor], &src, count,
wchars, &ps);
memcpy(&term->search.buf[term->search.cursor], wcs, wchars * sizeof(wchar_t));
term->search.len += wchars;
term->search.cursor += wchars;