ref: c5629533e4c407f11d5378f399d6eef334e4e0c8
dir: /lib/c/strncat.c/
#include <string.h> #undef strncat char * strncat(char * restrict dst, const char * restrict src, size_t n) { char *ret = dst; while (*dst) ++dst; while (n-- > 0 && *src) *dst++ = *src++; *dst = '\0'; return ret; }