/*
 * Copyright 2014 Con Kolivas
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 3 of the License, or (at your option)
 * any later version.  See COPYING for more details.
 */

/* This file should contain all exported functions of libckpool */

#ifndef CKPOOL_H
#define CKPOOL_H

#include "config.h"

#include <stdint.h>

#if HAVE_BYTESWAP_H
# include <byteswap.h>
#endif

#if HAVE_ENDIAN_H
# include <endian.h>
#elif HAVE_SYS_ENDIAN_H
# include <sys/endian.h>
#endif

#ifndef bswap_16
 #define bswap_16 __builtin_bswap16
 #define bswap_32 __builtin_bswap32
 #define bswap_64 __builtin_bswap64
#endif

/* This assumes htobe32 is a macro in endian.h, and if it doesn't exist, then
 * htobe64 also won't exist */
#ifndef htobe32
# if __BYTE_ORDER == __LITTLE_ENDIAN
#  define htole16(x) (x)
#  define le16toh(x) (x)
#  define htole32(x) (x)
#  define htole64(x) (x)
#  define le32toh(x) (x)
#  define le64toh(x) (x)
#  define be32toh(x) bswap_32(x)
#  define be64toh(x) bswap_64(x)
#  define htobe16(x) bswap_16(x)
#  define htobe32(x) bswap_32(x)
#  define htobe64(x) bswap_64(x)
# elif __BYTE_ORDER == __BIG_ENDIAN
#  define htole16(x) bswap_16(x)
#  define le16toh(x) bswap_16(x)
#  define htole32(x) bswap_32(x)
#  define le32toh(x) bswap_32(x)
#  define le64toh(x) bswap_64(x)
#  define htole64(x) bswap_64(x)
#  define be32toh(x) (x)
#  define be64toh(x) (x)
#  define htobe16(x) (x)
#  define htobe32(x) (x)
#  define htobe64(x) (x)
# endif
#endif

#define unlikely(expr) (__builtin_expect(!!(expr), 0))
#define likely(expr) (__builtin_expect(!!(expr), 1))
#define __maybe_unused		__attribute__((unused))
#define uninitialised_var(x) x = x

/* Typedefs are evil but we use this one so often... */
typedef unsigned char uchar;

static inline void swap_256(void *dest_p, const void *src_p)
{
	uint32_t *dest = dest_p;
	const uint32_t *src = src_p;

	dest[0] = src[7];
	dest[1] = src[6];
	dest[2] = src[5];
	dest[3] = src[4];
	dest[4] = src[3];
	dest[5] = src[2];
	dest[6] = src[1];
	dest[7] = src[0];
}

static inline void bswap_256(void *dest_p, const void *src_p)
{
	uint32_t *dest = dest_p;
	const uint32_t *src = src_p;

	dest[0] = bswap_32(src[7]);
	dest[1] = bswap_32(src[6]);
	dest[2] = bswap_32(src[5]);
	dest[3] = bswap_32(src[4]);
	dest[4] = bswap_32(src[3]);
	dest[5] = bswap_32(src[2]);
	dest[6] = bswap_32(src[1]);
	dest[7] = bswap_32(src[0]);
}

static inline void flip_32(void *dest_p, const void *src_p)
{
	uint32_t *dest = dest_p;
	const uint32_t *src = src_p;
	int i;

	for (i = 0; i < 8; i++)
		dest[i] = bswap_32(src[i]);
}

static inline void flip_80(void *dest_p, const void *src_p)
{
	uint32_t *dest = dest_p;
	const uint32_t *src = src_p;
	int i;

	for (i = 0; i < 20; i++)
		dest[i] = bswap_32(src[i]);
}
#endif /* CKPOOL_H */