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-rw-r--r--rawmemrcasechr_inv.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/rawmemrcasechr_inv.c b/rawmemrcasechr_inv.c
index 483de3e..74ec992 100644
--- a/rawmemrcasechr_inv.c
+++ b/rawmemrcasechr_inv.c
@@ -8,7 +8,9 @@ libsimple_rawmemrcasechr_inv(const void *s_, int c, size_t n)
{
char *s = *(char **)(void *)&s_;
c = tolower(c);
- while (--n, tolower(s[n]) == c);
+ do {
+ n--;
+ } while (tolower(s[n]) == c);
return &s[n];
}