/******************************************/
/* integer.h 0.0.0 (1999-Oct-17-Sun)      */
/* Adam M. Costello <amc@cs.berkeley.edu> */
/******************************************/

/* Convert integers to and from arrays of bytes. */

/* This is ANSI C code. */


#ifndef INTEGER_H
#define INTEGER_H


#include <limits.h>


/* uint16 is an unsigned integral type     */
/* with at least 16 bits (but maybe more): */

typedef unsigned int uint16;
#define UINT16_MAX UINT_MAX


/* uint32 is an unsigned integral type     */
/* with at least 32 bits (but maybe more): */

#if UINT_MAX >= 0xffffffff
typedef unsigned int uint32;
#define UINT32_MAX UINT_MAX
#else
typedef unsigned long uint32;
#define UINT32_MAX ULONG_MAX
#endif


void encode_uint16(unsigned char *bytes, uint16 n);

    /* Encodes an integer, which must be in the range */
    /* 0..0xffff, as two bytes, most significant byte */
    /* first.  The pointer must point to an array of  */
    /* at least two characters.                       */


void encode_uint32(unsigned char *bytes, uint32 n);

    /* Encodes an integer, which must be in the range 0..0xffff, */
    /* as four bytes, most significant byte first.  The pointer  */
    /* must point to an array of at least four characters.       */


uint16 decode_uint16(const unsigned char *bytes);

    /* Interprets the first two characters of the array, which must */
    /* each be in the range 0..0xff, as an unsigned integer, most   */
    /* significant byte first, and returns the result.              */


uint32 decode_uint32(const unsigned char *bytes);

    /* Interprets the first four characters of the array, which   */
    /* must each be in the range 0..0xff, as an unsigned integer, */
    /* most significant byte first, and returns the result.       */


#endif /* INTEGER_H */