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-rw-r--r--src/libstddjb/byte_chr.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/libstddjb/byte_chr.c b/src/libstddjb/byte_chr.c
index ba774aa..8203433 100644
--- a/src/libstddjb/byte_chr.c
+++ b/src/libstddjb/byte_chr.c
@@ -5,6 +5,8 @@
size_t byte_chr (char const *s, size_t n, int c)
{
- void *p = memchr(s, c, n) ;
+ void *p ;
+ if (!n) return 0 ;
+ p = memchr(s, c, n) ;
return p ? (char *)p - s : n ;
}