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include/endian.h and libs/libc/endian: Add support for endian.h.

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This commit is contained in:
Gregory Nutt 2018-08-19 07:44:04 -06:00
parent 0334b4dcc1
commit ed4aae0fe0
8 changed files with 369 additions and 0 deletions
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151
include/endian.h Normal file
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@ -0,0 +1,151 @@
/****************************************************************************
* include/endian.h
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_ENDIAN_H
#define __INCLUDE_ENDIAN_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/compiler.h>
#include <stdint.h>
/****************************************************************************
* Preprocessor definitions
****************************************************************************/
/* The endian.h header must define at least the following macros for use in
* determining host byte order for integer types:
*
* BYTE_ORDER This macro will have a value equal to one of the *_ENDIAN
* macros in this header.
* LITTLE_ENDIAN If BYTE_ORDER == LITTLE_ENDIAN, the host byte order is
* from least significant to most significant.
* BIG_ENDIAN If BYTE_ORDER == BIG_ENDIAN, the host byte order is from
* most significant to least significant.
*/
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
/* Common byte swapping macros */
#define __SWAP_UINT16_ISMACRO 1
#undef __SWAP_UINT32_ISMACRO
#ifdef __SWAP_UINT16_ISMACRO
# define __swap_uint16(n) \
(uint16_t)(((((uint16_t)(n)) & 0x00ff) << 8) | \
((((uint16_t)(n)) >> 8) & 0x00ff))
#endif
#ifdef __SWAP_UINT32_ISMACRO
# define __swap_uint32(n) \
(uint32_t)(((((uint32_t)(n)) & 0x000000ffUL) << 24) | \
((((uint32_t)(n)) & 0x0000ff00UL) << 8) | \
((((uint32_t)(n)) & 0x00ff0000UL) >> 8) | \
((((uint32_t)(n)) & 0xff000000UL) >> 24))
#endif
/* Endian-specific definitions */
#ifdef CONFIG_ENDIAN_BIG
/* Big-endian byte order */
# define BYTE_ORDER BIG_ENDIAN
/* Big-endian byte order macros */
# define htobe16(n) (n)
# define htole16(n) __swap_uint16((uint16_t)n)
# define be16toh(n) (n)
# define le16toh(n) __swap_uint16((uint16_t)n)
# define htobe32(n) (n)
# define htole32(n) __swap_uint32((uint32_t)n)
# define be32toh(n) (n)
# define le32toh(n) __swap_uint32(n)
# ifdef CONFIG_HAVE_LONG_LONG
# define htobe64(n) (n)
# define htole64(n) __swap_uint64((uint64_t)n)
# define be64toh(n) (n)
# define le64toh(n) __swap_uint64(uint64_t)n)
# endif
#else
/* Little-endian byte order */
# define BYTE_ORDER LITTLE_ENDIAN
/* Little-endian byte order macros */
# define htobe16(n) __swap_uint16((uint16_t)n)
# define htole16(n) (n)
# define be16toh(n) __swap_uint16((uint16_t)n)
# define le16toh(n) (n)
# define htobe32(n) __swap_uint32((uint32_t)n)
# define htole32(n) (n)
# define be32toh(n) __swap_uint32((uint32_t)n)
# define le32toh(n) (n)
# ifdef CONFIG_HAVE_LONG_LONG
# define htobe64(n) __swap_uint64(uint64_t)n)
# define htole64(n) (n)
# define be64toh(n) __swap_uint64(uint64_t)n)
# define le64toh(n) (n)
# endif
#endif
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#ifndef __SWAP_UINT16_ISMACRO
uint16_t __swap_uint16(uint16_t n);
#endif
#ifndef __SWAP_UINT32_ISMACRO
uint32_t __swap_uint32(uint32_t n);
#endif
#if CONFIG_HAVE_LONG_LONG
uint64_t __swap_uint64(uint64_t n);
#endif
#endif /* __INCLUDE_ENDIAN_H */

1
libs/libc/Makefile
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@ -57,6 +57,7 @@ include aio/Make.defs
include audio/Make.defs
include dirent/Make.defs
include dllfcn/Make.defs
include endian/Make.defs
include fixedmath/Make.defs
include hex2bin/Make.defs
include inttypes/Make.defs

1
libs/libc/README.txt
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@ -30,6 +30,7 @@ we have:
audio - This part of the audio system: nuttx/audio/audio.h
dllfcn - dllfcn.h
endian - endian.h
hex2bin - hex2bin.h
libgen - libgen.h
locale - locale.h

4
libs/libc/endian/Kconfig Normal file
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#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#

43
libs/libc/endian/Make.defs Normal file
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############################################################################
# libs/libc/endian/Make.defs
#
# Copyright (C) 2018 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Add the endian.h C files to the build
CSRCS += lib_swap16.c lib_swap32.c lib_swap64.c
# Add the endian directory to the build
DEPPATH += --dep-path endian
VPATH += :endian

53
libs/libc/endian/lib_swap16.c Normal file
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/****************************************************************************
* libs/libc/endian/lib_swap16.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdint.h>
#include <endian.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#ifndef __SWAP_UINT16_ISMACRO
uint16_t __swap_uint16(uint16_t n)
{
return (uint16_t)(((((uint16_t)(n)) & 0x00ff) << 8) | \
((((uint16_t)(n)) >> 8) & 0x00ff));
}
#endif

55
libs/libc/endian/lib_swap32.c Normal file
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@ -0,0 +1,55 @@
/****************************************************************************
* libs/libc/endian/lib_swap32.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <stdint.h>
#include <endian.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#ifndef __SWAP_UINT32_ISMACRO
uint32_t __swap_uint32(uint32_t n)
{
return (uint32_t)(((((uint32_t)(n)) & 0x000000ffUL) << 24) | \
((((uint32_t)(n)) & 0x0000ff00UL) << 8) | \
((((uint32_t)(n)) & 0x00ff0000UL) >> 8) | \
((((uint32_t)(n)) & 0xff000000UL) >> 24));
}
#endif

61
libs/libc/endian/lib_swap64.c Normal file
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@ -0,0 +1,61 @@
/****************************************************************************
* libs/libc/endian/lib_swap64.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/compiler.h>
#include <stdint.h>
#include <endian.h>
/****************************************************************************
* Public Functions
****************************************************************************/
#ifdef CONFIG_HAVE_LONG_LONG
uint64_t __swap_uint64(uint64_t n)
{
return (uint64_t)(((((uint64_t)(n)) & 0x00000000000000ffULL) << 56) | \
((((uint64_t)(n)) & 0x000000000000ff00ULL) << 40) | \
((((uint64_t)(n)) & 0x0000000000ff0000ULL) << 24) | \
((((uint64_t)(n)) & 0x00000000ff000000ULL) << 8) | \
((((uint64_t)(n)) & 0x000000ff00000000ULL) >> 8) | \
((((uint64_t)(n)) & 0x0000ff0000000000ULL) >> 24) | \
((((uint64_t)(n)) & 0x00ff000000000000ULL) >> 40) | \
((((uint64_t)(n)) & 0xff00000000000000ULL) >> 56));
}
#endif