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/***************************************************************************
* Copyright (C) 2004, 2005 by Dominic Rath *
* Dominic.Rath@gmx.de *
* *
* Copyright (C) 2007,2008 Øyvind Harboe *
* oyvind.harboe@zylin.com *
* *
* 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 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the *
* Free Software Foundation, Inc., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#ifndef TYPES_H
#define TYPES_H
#include <stddef.h>
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#else /* HAVE_STDBOOL_H */
#define __bool_true_false_are_defined 1
#ifndef HAVE__BOOL
#ifndef __cplusplus
#define false 0
#define true 1
typedef int _Bool;
#else
typedef bool _Bool;
#endif /* __cplusplus */
#endif /* HAVE__BOOL */
#define bool _Bool
#endif /* HAVE_STDBOOL_H */
/// turns a macro argument into a string constant
#define stringify(s) __stringify(s)
#define __stringify(s) #s
/**
* Compute the number of elements of a variable length array.
* <code>
* const char *strs[] = { "a", "b", "c" };
* unsigned num_strs = ARRAY_SIZE(strs);
* </code>
*/
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
/**
* Cast a member of a structure out to the containing structure.
* @param ptr The pointer to the member.
* @param type The type of the container struct this is embedded in.
* @param member The name of the member within the struct.
*
* This is a mechanism which is used throughout the Linux kernel.
*/
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (void *) ( (char *)__mptr - offsetof(type,member) ) );})
/**
* Rounds @c m up to the nearest multiple of @c n using division.
* @param m The value to round up to @c n.
* @param n Round @c m up to a multiple of this number.
* @returns The rounded integer value.
*/
#define DIV_ROUND_UP(m, n) (((m) + (n) - 1) / (n))
/* DANGER!!!! here be dragons!
*
* Leave these fn's as byte accesses because it is safe
* across architectures. Clever usage of 32 bit access
* will create problems on some hosts.
*
* Note that the "buf" pointer in memory is probably unaligned.
*
* Were these functions to be re-written to take a 32 bit wide or 16 bit wide
* memory access shortcut, then on some CPU's, i.e. ARM7, the 2 lsbytes of the address are
* ignored for 32 bit access, whereas on other CPU's a 32 bit wide unaligned memory access
* will cause an exception, and lastly on x86, an unaligned "greater than bytewide"
* memory access works as if aligned. So what follows below will work for all
* platforms and gives the compiler leeway to do its own platform specific optimizations.
*
* Again, note that the "buf" pointer in memory is probably unaligned.
*/
static inline uint32_t le_to_h_u32(const uint8_t* buf)
{
return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24);
}
static inline uint32_t le_to_h_u24(const uint8_t* buf)
{
return (uint32_t)(buf[0] | buf[1] << 8 | buf[2] << 16);
}
static inline uint16_t le_to_h_u16(const uint8_t* buf)
{
return (uint16_t)(buf[0] | buf[1] << 8);
}
static inline uint32_t be_to_h_u32(const uint8_t* buf)
{
return (uint32_t)(buf[3] | buf[2] << 8 | buf[1] << 16 | buf[0] << 24);
}
static inline uint32_t be_to_h_u24(const uint8_t* buf)
{
return (uint32_t)(buf[2] | buf[1] << 8 | buf[0] << 16);
}
static inline uint16_t be_to_h_u16(const uint8_t* buf)
{
return (uint16_t)(buf[1] | buf[0] << 8);
}
static inline void h_u32_to_le(uint8_t* buf, int val)
{
buf[3] = (uint8_t) (val >> 24);
buf[2] = (uint8_t) (val >> 16);
buf[1] = (uint8_t) (val >> 8);
buf[0] = (uint8_t) (val >> 0);
}
static inline void h_u32_to_be(uint8_t* buf, int val)
{
buf[0] = (uint8_t) (val >> 24);
buf[1] = (uint8_t) (val >> 16);
buf[2] = (uint8_t) (val >> 8);
buf[3] = (uint8_t) (val >> 0);
}
static inline void h_u24_to_le(uint8_t* buf, int val)
{
buf[2] = (uint8_t) (val >> 16);
buf[1] = (uint8_t) (val >> 8);
buf[0] = (uint8_t) (val >> 0);
}
static inline void h_u24_to_be(uint8_t* buf, int val)
{
buf[0] = (uint8_t) (val >> 16);
buf[1] = (uint8_t) (val >> 8);
buf[2] = (uint8_t) (val >> 0);
}
static inline void h_u16_to_le(uint8_t* buf, int val)
{
buf[1] = (uint8_t) (val >> 8);
buf[0] = (uint8_t) (val >> 0);
}
static inline void h_u16_to_be(uint8_t* buf, int val)
{
buf[0] = (uint8_t) (val >> 8);
buf[1] = (uint8_t) (val >> 0);
}
#if defined(__ECOS)
/* eCos plain lacks these definition... A series of upstream patches
* could probably repair it, but it seems like too much work to be
* worth it.
*/
#if !defined(_STDINT_H)
#define PRIx32 "x"
#define PRId32 "d"
#define SCNx32 "x"
#define PRIi32 "i"
#define PRIu32 "u"
#define PRId8 PRId32
#define SCNx64 "llx"
#define PRIx64 "llx"
typedef CYG_ADDRWORD intptr_t;
typedef int64_t intmax_t;
typedef uint64_t uintmax_t;
#define INT8_MAX 0x7f
#define INT8_MIN (-INT8_MAX - 1)
# define UINT8_MAX (255)
#define INT16_MAX 0x7fff
#define INT16_MIN (-INT16_MAX - 1)
# define UINT16_MAX (65535)
#define INT32_MAX 0x7fffffffL
#define INT32_MIN (-INT32_MAX - 1L)
# define UINT32_MAX (4294967295U)
#define INT64_MAX 0x7fffffffffffffffLL
#define INT64_MIN (-INT64_MAX - 1LL)
#define UINT64_MAX (__CONCAT(INT64_MAX, U) * 2ULL + 1ULL)
#endif
#ifndef LLONG_MAX
#define ULLONG_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
#define LLONG_MAX INT64_C(0x7FFFFFFFFFFFFFFF)
#define LLONG_MIN ULLONG_MAX
#endif
#define ULLONG_MAX 18446744073709551615
/* C99, eCos is C90 compliant (with bits of C99) */
#define isblank(c) ((c) == ' ' || (c) == '\t')
#endif
#endif /* TYPES_H */
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