/* bcopy.c -- copy memory. Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate. In the public domain. By David MacKenzie . */ #include void bcopy (void const *source0, void *dest0, size_t length) { char const *source = source0; char *dest = dest0; if (source < dest) /* Moving from low mem to hi mem; start at end. */ for (source += length, dest += length; length; --length) *--dest = *--source; else if (source != dest) /* Moving from hi mem to low mem; start at beginning. */ for (; length; --length) *dest++ = *source++; }