github.com/afumu/libc@v0.0.6/musl/src/string/strnlen.c (about)

     1  #include <string.h>
     2  
     3  size_t strnlen(const char *s, size_t n)
     4  {
     5  	const char *p = memchr(s, 0, n);
     6  	return p ? p-s : n;
     7  }