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/*****************************************************************************
 * Nessie.h
 *
 * Last Modified: 00/08/30             Created: 00/08/30
 *
 * Project    : Nessie Proposal: NOEKEON
 *
 * Authors    : Joan Daemen, Michael Peeters, Vincent Rijmen, Gilles Van Assche
 *
 * Written by : originally written by [NESSIE]
 *              modifications brought by Michael Peeters
 *
 * References : [NESSIE] see http://cryptonessie.org/ for information about 
 *                       interface conventions and definition of portable C.
 *
 * Description: Macro definitions useful for portability
 *              Data structures used for NOEKEON
 *
 * Modif.     : Minor bugs in U8TO32_BIG & U8TO32_LITTLE, 
 *              data structures for Noekeon
 ****************************************************************************/

#ifndef PORTABLE_C__
#define PORTABLE_C__

#include <limits.h>
#include <stdio.h>

/* Definition of minimum-width integer types
 * 
 * u8   -> unsigned integer type, at least 8 bits, equivalent to unsigned char
 * u16  -> unsigned integer type, at least 16 bits
 * u32  -> unsigned integer type, at least 32 bits
 *
 * s8, s16, s32  -> signed counterparts of u8, u16, u32
 *
 * Always use macro's T8(), T16() or T32() to obtain exact-width results,
 * i.e., to specify the size of the result of each expression.
 */

typedef signed char s8;
typedef unsigned char u8;

#if UINT_MAX >= 4294967295UL

typedef signed short s16;
typedef signed int s32;
typedef unsigned short u16;
typedef unsigned int u32;

#define ONE32   0xffffffffU

#else

typedef signed int s16;
typedef signed long s32;
typedef unsigned int u16;
typedef unsigned long u32;

#define ONE32   0xffffffffUL

#endif

#define ONE8    0xffU
#define ONE16   0xffffU

#define T8(x)   ((x) & ONE8)
#define T16(x)  ((x) & ONE16)
#define T32(x)  ((x) & ONE32)

/*
 * If you want 64-bit values, uncomment the following lines; this
 * reduces portability.
 */
/*
  #if ((1UL << 31) * 2UL) != 0UL