You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
363 lines
9.4 KiB
363 lines
9.4 KiB
/* CC0 (Public domain) - see LICENSE file for details */
|
|
#ifndef CCAN_ENDIAN_H
|
|
#define CCAN_ENDIAN_H
|
|
#include <stdint.h>
|
|
#include "config.h"
|
|
|
|
/**
|
|
* BSWAP_16 - reverse bytes in a constant uint16_t value.
|
|
* @val: constant value whose bytes to swap.
|
|
*
|
|
* Designed to be usable in constant-requiring initializers.
|
|
*
|
|
* Example:
|
|
* struct mystruct {
|
|
* char buf[BSWAP_16(0x1234)];
|
|
* };
|
|
*/
|
|
#define BSWAP_16(val) \
|
|
((((uint16_t)(val) & 0x00ff) << 8) \
|
|
| (((uint16_t)(val) & 0xff00) >> 8))
|
|
|
|
/**
|
|
* BSWAP_32 - reverse bytes in a constant uint32_t value.
|
|
* @val: constant value whose bytes to swap.
|
|
*
|
|
* Designed to be usable in constant-requiring initializers.
|
|
*
|
|
* Example:
|
|
* struct mystruct {
|
|
* char buf[BSWAP_32(0xff000000)];
|
|
* };
|
|
*/
|
|
#define BSWAP_32(val) \
|
|
((((uint32_t)(val) & 0x000000ff) << 24) \
|
|
| (((uint32_t)(val) & 0x0000ff00) << 8) \
|
|
| (((uint32_t)(val) & 0x00ff0000) >> 8) \
|
|
| (((uint32_t)(val) & 0xff000000) >> 24))
|
|
|
|
/**
|
|
* BSWAP_64 - reverse bytes in a constant uint64_t value.
|
|
* @val: constantvalue whose bytes to swap.
|
|
*
|
|
* Designed to be usable in constant-requiring initializers.
|
|
*
|
|
* Example:
|
|
* struct mystruct {
|
|
* char buf[BSWAP_64(0xff00000000000000ULL)];
|
|
* };
|
|
*/
|
|
#define BSWAP_64(val) \
|
|
((((uint64_t)(val) & 0x00000000000000ffULL) << 56) \
|
|
| (((uint64_t)(val) & 0x000000000000ff00ULL) << 40) \
|
|
| (((uint64_t)(val) & 0x0000000000ff0000ULL) << 24) \
|
|
| (((uint64_t)(val) & 0x00000000ff000000ULL) << 8) \
|
|
| (((uint64_t)(val) & 0x000000ff00000000ULL) >> 8) \
|
|
| (((uint64_t)(val) & 0x0000ff0000000000ULL) >> 24) \
|
|
| (((uint64_t)(val) & 0x00ff000000000000ULL) >> 40) \
|
|
| (((uint64_t)(val) & 0xff00000000000000ULL) >> 56))
|
|
|
|
#if HAVE_BYTESWAP_H
|
|
#include <byteswap.h>
|
|
#else
|
|
/**
|
|
* bswap_16 - reverse bytes in a uint16_t value.
|
|
* @val: value whose bytes to swap.
|
|
*
|
|
* Example:
|
|
* // Output contains "1024 is 4 as two bytes reversed"
|
|
* printf("1024 is %u as two bytes reversed\n", bswap_16(1024));
|
|
*/
|
|
static inline uint16_t bswap_16(uint16_t val)
|
|
{
|
|
return BSWAP_16(val);
|
|
}
|
|
|
|
/**
|
|
* bswap_32 - reverse bytes in a uint32_t value.
|
|
* @val: value whose bytes to swap.
|
|
*
|
|
* Example:
|
|
* // Output contains "1024 is 262144 as four bytes reversed"
|
|
* printf("1024 is %u as four bytes reversed\n", bswap_32(1024));
|
|
*/
|
|
static inline uint32_t bswap_32(uint32_t val)
|
|
{
|
|
return BSWAP_32(val);
|
|
}
|
|
#endif /* !HAVE_BYTESWAP_H */
|
|
|
|
#if !HAVE_BSWAP_64
|
|
/**
|
|
* bswap_64 - reverse bytes in a uint64_t value.
|
|
* @val: value whose bytes to swap.
|
|
*
|
|
* Example:
|
|
* // Output contains "1024 is 1125899906842624 as eight bytes reversed"
|
|
* printf("1024 is %llu as eight bytes reversed\n",
|
|
* (unsigned long long)bswap_64(1024));
|
|
*/
|
|
static inline uint64_t bswap_64(uint64_t val)
|
|
{
|
|
return BSWAP_64(val);
|
|
}
|
|
#endif
|
|
|
|
/* Needed for Glibc like endiness check */
|
|
#define __LITTLE_ENDIAN 1234
|
|
#define __BIG_ENDIAN 4321
|
|
|
|
/* Sanity check the defines. We don't handle weird endianness. */
|
|
#if !HAVE_LITTLE_ENDIAN && !HAVE_BIG_ENDIAN
|
|
#error "Unknown endian"
|
|
#elif HAVE_LITTLE_ENDIAN && HAVE_BIG_ENDIAN
|
|
#error "Can't compile for both big and little endian."
|
|
#elif HAVE_LITTLE_ENDIAN
|
|
#ifndef __BYTE_ORDER
|
|
#define __BYTE_ORDER __LITTLE_ENDIAN
|
|
#elif __BYTE_ORDER != __LITTLE_ENDIAN
|
|
#error "__BYTE_ORDER already defined, but not equal to __LITTLE_ENDIAN"
|
|
#endif
|
|
#elif HAVE_BIG_ENDIAN
|
|
#ifndef __BYTE_ORDER
|
|
#define __BYTE_ORDER __BIG_ENDIAN
|
|
#elif __BYTE_ORDER != __BIG_ENDIAN
|
|
#error "__BYTE_ORDER already defined, but not equal to __BIG_ENDIAN"
|
|
#endif
|
|
#endif
|
|
|
|
|
|
#ifdef __CHECKER__
|
|
/* sparse needs forcing to remove bitwise attribute from ccan/short_types */
|
|
#define ENDIAN_CAST __attribute__((force))
|
|
#define ENDIAN_TYPE __attribute__((bitwise))
|
|
#else
|
|
#define ENDIAN_CAST
|
|
#define ENDIAN_TYPE
|
|
#endif
|
|
|
|
typedef uint64_t ENDIAN_TYPE leint64_t;
|
|
typedef uint64_t ENDIAN_TYPE beint64_t;
|
|
typedef uint32_t ENDIAN_TYPE leint32_t;
|
|
typedef uint32_t ENDIAN_TYPE beint32_t;
|
|
typedef uint16_t ENDIAN_TYPE leint16_t;
|
|
typedef uint16_t ENDIAN_TYPE beint16_t;
|
|
|
|
#if HAVE_LITTLE_ENDIAN
|
|
/**
|
|
* CPU_TO_LE64 - convert a constant uint64_t value to little-endian
|
|
* @native: constant to convert
|
|
*/
|
|
#define CPU_TO_LE64(native) ((ENDIAN_CAST leint64_t)(native))
|
|
|
|
/**
|
|
* CPU_TO_LE32 - convert a constant uint32_t value to little-endian
|
|
* @native: constant to convert
|
|
*/
|
|
#define CPU_TO_LE32(native) ((ENDIAN_CAST leint32_t)(native))
|
|
|
|
/**
|
|
* CPU_TO_LE16 - convert a constant uint16_t value to little-endian
|
|
* @native: constant to convert
|
|
*/
|
|
#define CPU_TO_LE16(native) ((ENDIAN_CAST leint16_t)(native))
|
|
|
|
/**
|
|
* LE64_TO_CPU - convert a little-endian uint64_t constant
|
|
* @le_val: little-endian constant to convert
|
|
*/
|
|
#define LE64_TO_CPU(le_val) ((ENDIAN_CAST uint64_t)(le_val))
|
|
|
|
/**
|
|
* LE32_TO_CPU - convert a little-endian uint32_t constant
|
|
* @le_val: little-endian constant to convert
|
|
*/
|
|
#define LE32_TO_CPU(le_val) ((ENDIAN_CAST uint32_t)(le_val))
|
|
|
|
/**
|
|
* LE16_TO_CPU - convert a little-endian uint16_t constant
|
|
* @le_val: little-endian constant to convert
|
|
*/
|
|
#define LE16_TO_CPU(le_val) ((ENDIAN_CAST uint16_t)(le_val))
|
|
|
|
#else /* ... HAVE_BIG_ENDIAN */
|
|
#define CPU_TO_LE64(native) ((ENDIAN_CAST leint64_t)BSWAP_64(native))
|
|
#define CPU_TO_LE32(native) ((ENDIAN_CAST leint32_t)BSWAP_32(native))
|
|
#define CPU_TO_LE16(native) ((ENDIAN_CAST leint16_t)BSWAP_16(native))
|
|
#define LE64_TO_CPU(le_val) BSWAP_64((ENDIAN_CAST uint64_t)le_val)
|
|
#define LE32_TO_CPU(le_val) BSWAP_32((ENDIAN_CAST uint32_t)le_val)
|
|
#define LE16_TO_CPU(le_val) BSWAP_16((ENDIAN_CAST uint16_t)le_val)
|
|
#endif /* HAVE_BIG_ENDIAN */
|
|
|
|
#if HAVE_BIG_ENDIAN
|
|
/**
|
|
* CPU_TO_BE64 - convert a constant uint64_t value to big-endian
|
|
* @native: constant to convert
|
|
*/
|
|
#define CPU_TO_BE64(native) ((ENDIAN_CAST beint64_t)(native))
|
|
|
|
/**
|
|
* CPU_TO_BE32 - convert a constant uint32_t value to big-endian
|
|
* @native: constant to convert
|
|
*/
|
|
#define CPU_TO_BE32(native) ((ENDIAN_CAST beint32_t)(native))
|
|
|
|
/**
|
|
* CPU_TO_BE16 - convert a constant uint16_t value to big-endian
|
|
* @native: constant to convert
|
|
*/
|
|
#define CPU_TO_BE16(native) ((ENDIAN_CAST beint16_t)(native))
|
|
|
|
/**
|
|
* BE64_TO_CPU - convert a big-endian uint64_t constant
|
|
* @le_val: big-endian constant to convert
|
|
*/
|
|
#define BE64_TO_CPU(le_val) ((ENDIAN_CAST uint64_t)(le_val))
|
|
|
|
/**
|
|
* BE32_TO_CPU - convert a big-endian uint32_t constant
|
|
* @le_val: big-endian constant to convert
|
|
*/
|
|
#define BE32_TO_CPU(le_val) ((ENDIAN_CAST uint32_t)(le_val))
|
|
|
|
/**
|
|
* BE16_TO_CPU - convert a big-endian uint16_t constant
|
|
* @le_val: big-endian constant to convert
|
|
*/
|
|
#define BE16_TO_CPU(le_val) ((ENDIAN_CAST uint16_t)(le_val))
|
|
|
|
#else /* ... HAVE_LITTLE_ENDIAN */
|
|
#define CPU_TO_BE64(native) ((ENDIAN_CAST beint64_t)BSWAP_64(native))
|
|
#define CPU_TO_BE32(native) ((ENDIAN_CAST beint32_t)BSWAP_32(native))
|
|
#define CPU_TO_BE16(native) ((ENDIAN_CAST beint16_t)BSWAP_16(native))
|
|
#define BE64_TO_CPU(le_val) BSWAP_64((ENDIAN_CAST uint64_t)le_val)
|
|
#define BE32_TO_CPU(le_val) BSWAP_32((ENDIAN_CAST uint32_t)le_val)
|
|
#define BE16_TO_CPU(le_val) BSWAP_16((ENDIAN_CAST uint16_t)le_val)
|
|
#endif /* HAVE_LITTE_ENDIAN */
|
|
|
|
|
|
/**
|
|
* cpu_to_le64 - convert a uint64_t value to little-endian
|
|
* @native: value to convert
|
|
*/
|
|
static inline leint64_t cpu_to_le64(uint64_t native)
|
|
{
|
|
return CPU_TO_LE64(native);
|
|
}
|
|
|
|
/**
|
|
* cpu_to_le32 - convert a uint32_t value to little-endian
|
|
* @native: value to convert
|
|
*/
|
|
static inline leint32_t cpu_to_le32(uint32_t native)
|
|
{
|
|
return CPU_TO_LE32(native);
|
|
}
|
|
|
|
/**
|
|
* cpu_to_le16 - convert a uint16_t value to little-endian
|
|
* @native: value to convert
|
|
*/
|
|
static inline leint16_t cpu_to_le16(uint16_t native)
|
|
{
|
|
return CPU_TO_LE16(native);
|
|
}
|
|
|
|
/**
|
|
* le64_to_cpu - convert a little-endian uint64_t value
|
|
* @le_val: little-endian value to convert
|
|
*/
|
|
static inline uint64_t le64_to_cpu(leint64_t le_val)
|
|
{
|
|
return LE64_TO_CPU(le_val);
|
|
}
|
|
|
|
/**
|
|
* le32_to_cpu - convert a little-endian uint32_t value
|
|
* @le_val: little-endian value to convert
|
|
*/
|
|
static inline uint32_t le32_to_cpu(leint32_t le_val)
|
|
{
|
|
return LE32_TO_CPU(le_val);
|
|
}
|
|
|
|
/**
|
|
* le16_to_cpu - convert a little-endian uint16_t value
|
|
* @le_val: little-endian value to convert
|
|
*/
|
|
static inline uint16_t le16_to_cpu(leint16_t le_val)
|
|
{
|
|
return LE16_TO_CPU(le_val);
|
|
}
|
|
|
|
/**
|
|
* cpu_to_be64 - convert a uint64_t value to big endian.
|
|
* @native: value to convert
|
|
*/
|
|
static inline beint64_t cpu_to_be64(uint64_t native)
|
|
{
|
|
return CPU_TO_BE64(native);
|
|
}
|
|
|
|
/**
|
|
* cpu_to_be32 - convert a uint32_t value to big endian.
|
|
* @native: value to convert
|
|
*/
|
|
static inline beint32_t cpu_to_be32(uint32_t native)
|
|
{
|
|
return CPU_TO_BE32(native);
|
|
}
|
|
|
|
/**
|
|
* cpu_to_be16 - convert a uint16_t value to big endian.
|
|
* @native: value to convert
|
|
*/
|
|
static inline beint16_t cpu_to_be16(uint16_t native)
|
|
{
|
|
return CPU_TO_BE16(native);
|
|
}
|
|
|
|
/**
|
|
* be64_to_cpu - convert a big-endian uint64_t value
|
|
* @be_val: big-endian value to convert
|
|
*/
|
|
static inline uint64_t be64_to_cpu(beint64_t be_val)
|
|
{
|
|
return BE64_TO_CPU(be_val);
|
|
}
|
|
|
|
/**
|
|
* be32_to_cpu - convert a big-endian uint32_t value
|
|
* @be_val: big-endian value to convert
|
|
*/
|
|
static inline uint32_t be32_to_cpu(beint32_t be_val)
|
|
{
|
|
return BE32_TO_CPU(be_val);
|
|
}
|
|
|
|
/**
|
|
* be16_to_cpu - convert a big-endian uint16_t value
|
|
* @be_val: big-endian value to convert
|
|
*/
|
|
static inline uint16_t be16_to_cpu(beint16_t be_val)
|
|
{
|
|
return BE16_TO_CPU(be_val);
|
|
}
|
|
|
|
/* Whichever they include first, they get these definitions. */
|
|
#ifdef CCAN_SHORT_TYPES_H
|
|
/**
|
|
* be64/be32/be16 - 64/32/16 bit big-endian representation.
|
|
*/
|
|
typedef beint64_t be64;
|
|
typedef beint32_t be32;
|
|
typedef beint16_t be16;
|
|
|
|
/**
|
|
* le64/le32/le16 - 64/32/16 bit little-endian representation.
|
|
*/
|
|
typedef leint64_t le64;
|
|
typedef leint32_t le32;
|
|
typedef leint16_t le16;
|
|
#endif
|
|
#endif /* CCAN_ENDIAN_H */
|
|
|