void      PutReserve(byte *& p, dword size = 1) { if(ptr + size <= wrlim) { p = ptr; ptr += size; } else p = NULL; }
	dword     GetReserve(byte *& p, dword size = 1) { if(ptr + size <= rdlim) { p = ptr; ptr += size; return size; } 
														else { dword s = dword((uintptr_t)(rdlim - ptr)); return ((s>0)?(p=ptr,s):(0)); } }