ObjFW  OFMacros.h at [c38fc9bb14]

File src/OFMacros.h artifact f80e6add7a part of check-in c38fc9bb14


/*
 * Copyright (c) 2008 - 2009
 *   Jonathan Schleifer <js@webkeks.org>
 *
 * All rights reserved.
 *
 * This file is part of libobjfw. It may be distributed under the terms of the
 * Q Public License 1.0, which can be found in the file LICENSE included in
 * the packaging of this file.
 */

#ifndef OF_CONFIGURED
#error You are missing the libobjfw definitions!
#error Please use objfw-config!
#endif

#include <stdint.h>

#ifdef __GNUC__
#define OF_INLINE inline __attribute__((always_inline))
#define OF_LIKELY(cond) __builtin_expect(!!(cond), 1)
#define OF_UNLIKELY(cond) __builtin_expect(!!(cond), 0)
#else
#define OF_INLINE inline
#define OF_LIKELY(cond) cond
#define OF_UNLIKELY(cond) cond
#endif

static OF_INLINE uint16_t
OF_BSWAP16(uint16_t i)
{
	i = (i & UINT16_C(0xFF00)) >> 8 |
	    (i & UINT16_C(0x00FF)) << 8;
	return i;
}

static OF_INLINE uint32_t
OF_BSWAP32(uint32_t i)
{
	i = (i & UINT32_C(0xFF000000)) >> 24 |
	    (i & UINT32_C(0x00FF0000)) >>  8 |
	    (i & UINT32_C(0x0000FF00)) <<  8 |
	    (i & UINT32_C(0x000000FF)) << 24;
	return i;
}

static OF_INLINE uint64_t
OF_BSWAP64(uint64_t i)
{
	i = (i & UINT64_C(0xFF00000000000000)) >> 56 |
	    (i & UINT64_C(0x00FF000000000000)) >> 40 |
	    (i & UINT64_C(0x0000FF0000000000)) >> 24 |
	    (i & UINT64_C(0x000000FF00000000)) >>  8 |
	    (i & UINT64_C(0x00000000FF000000)) <<  8 |
	    (i & UINT64_C(0x0000000000FF0000)) << 24 |
	    (i & UINT64_C(0x000000000000FF00)) << 40 |
	    (i & UINT64_C(0x00000000000000FF)) << 56;
	return i;
}

#ifdef OF_BIG_ENDIAN
static OF_INLINE void
OF_BSWAP32_V(uint32_t *buf, size_t len)
{
	while (len--) {
		*buf = OF_BSWAP32(*buf);
		buf++;
	}
}
#else
#define OF_BSWAP32_V(buf, len)
#endif

#define OF_ROL(val, bits) \
	(((val) << (bits)) | ((val) >> (32 - (bits))))

#define OF_HASH_INIT(hash) hash = 0
#define OF_HASH_ADD(hash, byte)		\
	{				\
		hash += byte;		\
		hash += (hash << 10);	\
		hash ^= (hash >> 6);	\
	}
#define OF_HASH_FINALIZE(hash)		\
	{				\
		hash += (hash << 3);	\
		hash ^= (hash >> 11);	\
		hash += (hash << 15);	\
	}