ref: ca543c97d5f35334bc9784a3b5c7c5a8fe7a8f8a dir: /lib/c/strcat.c/
#include <string.h> #undef strcat char * strcat(char * restrict dst, const char * restrict src) { char *ret = dst; while (*dst) ++dst; while (*dst++ = *src++) ; return ret; }