diff options
Diffstat (limited to 'libbb/safe_strncpy.c')
| -rw-r--r-- | libbb/safe_strncpy.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/libbb/safe_strncpy.c b/libbb/safe_strncpy.c index 8eb6a01..5eb0db0 100644 --- a/libbb/safe_strncpy.c +++ b/libbb/safe_strncpy.c @@ -20,8 +20,13 @@ char* FAST_FUNC safe_strncpy(char *dst, const char *src, size_t size) /* Like strcpy but can copy overlapping strings. */ void FAST_FUNC overlapping_strcpy(char *dst, const char *src) { - while ((*dst = *src) != '\0') { - dst++; - src++; + /* Cheap optimization for dst == src case - + * better to have it here than in many callers. + */ + if (dst != src) { + while ((*dst = *src) != '\0') { + dst++; + src++; + } } } |