slightly cleaner strlen, also seems to compile to better code

[musl] / src / string / swab.c

#include <unistd.h>

void swab(const void *restrict _src, void *restrict _dest, ssize_t n)
{
        const char *src = _src;
        char *dest = _dest;
        for (; n>0; n-=2) {
                dest[0] = src[1];
                dest[1] = src[0];
                dest += 2;
                src += 2;
        }
}