/* A perhaps slow but I hope correct implementation of memmove */
extern char *memcpy(char *, char *, int);
char *
memmove(char *dst, char *src, int n)
{ char *realdst = dst; if (n <= 0) return dst; if (src >= dst+n || dst >= src+n) return memcpy(dst, src, n); if (src > dst) { while (--n >= 0) *dst++ = *src++; } else if (src < dst) { src += n; dst += n; while (--n >= 0) *--dst = *--src; } return realdst; }