#ifndef PROTOTYPES#define PROTOTYPES 0#endif/* POINTER defines a generic pointer type */typedef unsigned char *POINTER;/* UINT2 defines a two byte word */typedef unsigned short int UINT2;/* UINT4 defines a four byte word */typedef unsigned long int UINT4;/* PROTO_LIST is defined depending on how PROTOTYPES is defined above.If using PROTOTYPES, then PROTO_LIST returns the list, otherwise it  returns an empty list. */#if PROTOTYPES#define PROTO_LIST(list) list#else#define PROTO_LIST(list) ()#endif