cuserid: support invocation with a null pointer argument

[musl.git] / src / string / wmemcmp.c

#include <wchar.h>

int wmemcmp(const wchar_t *l, const wchar_t *r, size_t n)
{
        for (; n && *l==*r; n--, l++, r++);
        return n ? *l-*r : 0;
}