em/dmenu
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fix possible overflow

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This commit is contained in:
Connor Lane Smith 2011-05-16 23:35:14 +01:00
parent dd2f298252
commit 3a60b19514
1 changed files with 4 additions and 4 deletions
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8
dmenu.c
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@ -31,7 +31,7 @@ static void grabkeyboard(void);
static void insert(const char *str, ssize_t n);
static void keypress(XKeyEvent *ev);
static void match(Bool sub);
static size_t nextrune(int incr);
static size_t nextrune(int inc);
static void paste(void);
static void readstdin(void);
static void run(void);
@ -426,10 +426,10 @@ match(Bool sub) {
}
size_t
nextrune(int incr) {
size_t n, len = strlen(text);
nextrune(int inc) {
ssize_t n;
for(n = cursor + incr; n < len && (text[n] & 0xc0) == 0x80; n += incr);
for(n = cursor + inc; n + inc >= 0 && (text[n] & 0xc0) == 0x80; n += inc);
return n;
}