Subversion Repositories planix.SVN

#include <string.h>

void*
memmove(void *a1, const void *a2, size_t n)
{
        char *s1, *s2;
        extern void abort(void);

        if((long)n < 0)
                abort();
        if(a1 > a2)
                goto back;
        s1 = a1;
        s2 = a2;
        while(n > 0) {
                *s1++ = *s2++;
                n--;
        }
        return a1;

back:
        s1 = (char*)a1 + n;
        s2 = (char*)a2 + n;
        while(n > 0) {
                *--s1 = *--s2;
                n--;
        }
        return a1;
}

void*
memcpy(void *a1, const void *a2, size_t n)
{
        return memmove(a1, a2, n);
}