global.h

des加密算法源码

#ifndef _GLOBAL_H_
#define _GLOBAL_H_

/* PROTOTYPES should be set to one if and only if the compiler supports
		 function argument prototyping.
	 The following makes PROTOTYPES default to 1 if it has not already been
		 defined as 0 with C compiler flags. */

#ifndef PROTOTYPES
#define PROTOTYPES 1
#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;

/* BYTE defines a unsigned character */
typedef unsigned char BYTE;

/* internal signed value */
typedef signed long int signeddigit;

#ifndef NULL_PTR
#define NULL_PTR ((POINTER)0)
#endif

#ifndef UNUSED_ARG
#define UNUSED_ARG(x) x = *(&x);
#endif

/* 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

#endif /* _GLOBAL_H_ */