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shapefil_private.h
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shapefil_private.h
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#ifndef SHAPEFILE_PRIVATE_H_INCLUDED
#define SHAPEFILE_PRIVATE_H_INCLUDED
/******************************************************************************
*
* Project: Shapelib
* Purpose: Private include file for Shapelib.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 1999, Frank Warmerdam
* Copyright (c) 2012-2016, Even Rouault <even dot rouault at spatialys.com>
*
* SPDX-License-Identifier: MIT OR LGPL-2.0-or-later
******************************************************************************
*
*/
#ifdef __cplusplus
#define STATIC_CAST(type, x) static_cast<type>(x)
#define REINTERPRET_CAST(type, x) reinterpret_cast<type>(x)
#define CONST_CAST(type, x) const_cast<type>(x)
#define SHPLIB_NULLPTR nullptr
#else
#define STATIC_CAST(type, x) ((type)(x))
#define REINTERPRET_CAST(type, x) ((type)(x))
#define CONST_CAST(type, x) ((type)(x))
#define SHPLIB_NULLPTR NULL
#endif
#if !defined(SHP_BIG_ENDIAN)
#if defined(CPL_MSB)
#define SHP_BIG_ENDIAN 1
#elif (defined(__GNUC__) && __GNUC__ >= 5) || \
(defined(__GNUC__) && defined(__GNUC_MINOR__) && __GNUC__ == 4 && \
__GNUC_MINOR__ >= 6)
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
#define SHP_BIG_ENDIAN 1
#endif
#elif defined(__GLIBC__)
#if __BYTE_ORDER == __BIG_ENDIAN
#define SHP_BIG_ENDIAN 1
#endif
#elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
#define SHP_BIG_ENDIAN 1
#elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
#elif defined(__sparc) || defined(__sparc__) || defined(_POWER) || \
defined(__powerpc__) || defined(__ppc__) || defined(__hpux) || \
defined(_MIPSEB) || defined(_POWER) || defined(__s390__)
#define SHP_BIG_ENDIAN 1
#endif
#endif
#include "shapefil.h"
#include <stdint.h>
#include <stdlib.h>
/************************************************************************/
/* Little endian <==> big endian byte swap macros. */
/************************************************************************/
#if (defined(__GNUC__) && __GNUC__ >= 5) || \
(defined(__GNUC__) && defined(__GNUC_MINOR__) && __GNUC__ == 4 && \
__GNUC_MINOR__ >= 8)
#define _SHP_SWAP32(x) \
STATIC_CAST(uint32_t, __builtin_bswap32(STATIC_CAST(uint32_t, x)))
#define _SHP_SWAP64(x) \
STATIC_CAST(uint64_t, __builtin_bswap64(STATIC_CAST(uint64_t, x)))
#elif defined(_MSC_VER)
#define _SHP_SWAP32(x) \
STATIC_CAST(uint32_t, _byteswap_ulong(STATIC_CAST(uint32_t, x)))
#define _SHP_SWAP64(x) \
STATIC_CAST(uint64_t, _byteswap_uint64(STATIC_CAST(uint64_t, x)))
#else
#define _SHP_SWAP32(x) \
STATIC_CAST(uint32_t, \
((STATIC_CAST(uint32_t, x) & 0x000000ffU) << 24) | \
((STATIC_CAST(uint32_t, x) & 0x0000ff00U) << 8) | \
((STATIC_CAST(uint32_t, x) & 0x00ff0000U) >> 8) | \
((STATIC_CAST(uint32_t, x) & 0xff000000U) >> 24))
#define _SHP_SWAP64(x) \
((STATIC_CAST(uint64_t, _SHP_SWAP32(STATIC_CAST(uint32_t, x))) << 32) | \
(STATIC_CAST(uint64_t, _SHP_SWAP32(STATIC_CAST( \
uint32_t, STATIC_CAST(uint64_t, x) >> 32)))))
#endif
/* in-place uint32_t* swap */
#define SHP_SWAP32(p) \
*REINTERPRET_CAST(uint32_t *, p) = \
_SHP_SWAP32(*REINTERPRET_CAST(uint32_t *, p))
/* in-place uint64_t* swap */
#define SHP_SWAP64(p) \
*REINTERPRET_CAST(uint64_t *, p) = \
_SHP_SWAP64(*REINTERPRET_CAST(uint64_t *, p))
/* in-place double* swap */
#define SHP_SWAPDOUBLE(x) \
do \
{ \
uint64_t _n64; \
void *_lx = x; \
memcpy(&_n64, _lx, 8); \
_n64 = _SHP_SWAP64(_n64); \
memcpy(_lx, &_n64, 8); \
} while (0)
/* copy double* swap*/
#define SHP_SWAPDOUBLE_CPY(dst, src) \
do \
{ \
uint64_t _n64; \
const void *_ls = src; \
void *_ld = dst; \
memcpy(&_n64, _ls, 8); \
_n64 = _SHP_SWAP64(_n64); \
memcpy(_ld, &_n64, 8); \
} while (0)
#endif /* ndef SHAPEFILE_PRIVATE_H_INCLUDED */