Tha_14/toxic
1
0
Fork 0
mirror of https://github.com/Tha14/toxic.git synced 2024-11-15 00:33:02 +01:00
Code Issues Projects Releases Wiki Activity

Use a small hack to get around an ncurses buffer overread

Browse Source 
Patch by iphydf
This commit is contained in:
jfreegman 2022-03-16 16:31:41 -04:00
parent fdfaaf953f
commit 22ca3704d2
No known key found for this signature in database
GPG Key ID: 3627F3144076AE63
1 changed files with 8 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/line_info.c
View File

@ -143,11 +143,14 @@ static struct line_info *line_info_ret_queue(struct history *hst)
*/
static int print_n_chars(WINDOW *win, const wchar_t *s, size_t n, int max_y)
{
// we use an array to represent a single wchar in order to get around an ncurses
// bug with waddnwstr() that overreads the memory address by one byte when
// supplied with a single wchar.
wchar_t ch[2] = {0};
bool newline = false;
wchar_t ch;
for (size_t i = 0; i < n && (ch = s[i]); ++i) {
if (ch == L'\n') {
for (size_t i = 0; i < n && (ch[0] = s[i]); ++i) {
if (ch[0] == L'\n') {
newline = true;
int x;
@ -164,11 +167,11 @@ static int print_n_chars(WINDOW *win, const wchar_t *s, size_t n, int max_y)
if (win) {
#ifdef HAVE_WIDECHAR
waddnwstr(win, &ch, 1);
waddnwstr(win, ch, 1);
#else
char b;
if (wcstombs(&b, &ch, sizeof(char)) != 1) {
if (wcstombs(&b, ch, sizeof(char)) != 1) {
continue;
}