24b7bf2746
* configure.ac (gl_cv_header_working_endian_h): Remove temporary workaround for Android. * lib/endian.in.h: Copy latest version from Gnulib.
252 lines
4.4 KiB
C
252 lines
4.4 KiB
C
/* endian.h - Byte order macros
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Copyright 2024 Free Software Foundation, Inc.
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This file is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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This file is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Collin Funk. */
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#ifndef _@GUARD_PREFIX@_ENDIAN_H
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#if __GNUC__ >= 3
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@PRAGMA_SYSTEM_HEADER@
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#endif
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@PRAGMA_COLUMNS@
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#if @HAVE_ENDIAN_H@
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/* The include_next requires a split double-inclusion guard. */
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# @INCLUDE_NEXT@ @NEXT_ENDIAN_H@
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#endif
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/* glibc defines all macros and functions but is missing types from
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stdint.h. */
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#if @ENDIAN_H_JUST_MISSING_STDINT@
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# include <stdint.h>
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#else
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/* Others platforms. */
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#ifndef _@GUARD_PREFIX@_ENDIAN_H
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#define _@GUARD_PREFIX@_ENDIAN_H 1
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/* This file uses _GL_INLINE, WORDS_BIGENDIAN. */
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#if !_GL_CONFIG_H_INCLUDED
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#error "Please include config.h first."
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#endif
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/* Define uint16_t and uint32_t.
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Define uint64_t if it is available. */
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#include <stdint.h>
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/* Byteswap functions. */
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#include <byteswap.h>
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_GL_INLINE_HEADER_BEGIN
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#ifndef _GL_ENDIAN_INLINE
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# define _GL_ENDIAN_INLINE _GL_INLINE
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#endif
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#define LITTLE_ENDIAN 1234
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#define BIG_ENDIAN 4321
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#define PDP_ENDIAN 3412
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#ifdef WORDS_BIGENDIAN
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# define BYTE_ORDER BIG_ENDIAN
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#else
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# define BYTE_ORDER LITTLE_ENDIAN
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#endif
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#if @HAVE_ENDIAN_H@
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/* Make sure we don't have any system definitions. */
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# undef be16toh
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# undef be32toh
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# undef be64toh
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# undef htobe16
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# undef htobe32
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# undef htobe64
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# undef le16toh
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# undef le32toh
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# undef le64toh
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# undef htole16
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# undef htole32
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# undef htole64
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/* Define our own. */
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# define be16toh rpl_endian_be16toh
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# define be32toh rpl_endian_be32toh
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# define be64toh rpl_endian_be64toh
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# define htobe16 rpl_endian_htobe16
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# define htobe32 rpl_endian_htobe32
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# define htobe64 rpl_endian_htobe64
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# define le16toh rpl_endian_le16toh
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# define le32toh rpl_endian_le32toh
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# define le64toh rpl_endian_le64toh
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# define htole16 rpl_endian_htole16
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# define htole32 rpl_endian_htole32
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# define htole64 rpl_endian_htole64
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Big endian to host. */
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_GL_ENDIAN_INLINE uint16_t
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be16toh (uint16_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return x;
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#else
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return bswap_16 (x);
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#endif
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}
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_GL_ENDIAN_INLINE uint32_t
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be32toh (uint32_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return x;
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#else
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return bswap_32 (x);
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#endif
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}
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#ifdef UINT64_MAX
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_GL_ENDIAN_INLINE uint64_t
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be64toh (uint64_t x)
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{
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# if BYTE_ORDER == BIG_ENDIAN
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return x;
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# else
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return bswap_64 (x);
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# endif
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}
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#endif
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/* Host to big endian. */
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_GL_ENDIAN_INLINE uint16_t
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htobe16 (uint16_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return x;
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#else
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return bswap_16 (x);
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#endif
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}
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_GL_ENDIAN_INLINE uint32_t
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htobe32 (uint32_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return x;
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#else
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return bswap_32 (x);
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#endif
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}
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#ifdef UINT64_MAX
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_GL_ENDIAN_INLINE uint64_t
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htobe64 (uint64_t x)
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{
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# if BYTE_ORDER == BIG_ENDIAN
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return x;
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# else
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return bswap_64 (x);
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# endif
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}
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#endif
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/* Little endian to host. */
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_GL_ENDIAN_INLINE uint16_t
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le16toh (uint16_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return bswap_16 (x);
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#else
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return x;
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#endif
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}
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_GL_ENDIAN_INLINE uint32_t
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le32toh (uint32_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return bswap_32 (x);
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#else
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return x;
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#endif
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}
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#ifdef UINT64_MAX
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_GL_ENDIAN_INLINE uint64_t
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le64toh (uint64_t x)
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{
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# if BYTE_ORDER == BIG_ENDIAN
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return bswap_64 (x);
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# else
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return x;
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# endif
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}
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#endif
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/* Host to little endian. */
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_GL_ENDIAN_INLINE uint16_t
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htole16 (uint16_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return bswap_16 (x);
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#else
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return x;
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#endif
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}
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_GL_ENDIAN_INLINE uint32_t
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htole32 (uint32_t x)
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{
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#if BYTE_ORDER == BIG_ENDIAN
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return bswap_32 (x);
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#else
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return x;
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#endif
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}
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#ifdef UINT64_MAX
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_GL_ENDIAN_INLINE uint64_t
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htole64 (uint64_t x)
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{
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# if BYTE_ORDER == BIG_ENDIAN
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return bswap_64 (x);
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# else
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return x;
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# endif
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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_GL_INLINE_HEADER_END
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#endif /* @ENDIAN_H_JUST_MISSING_STDINT@ */
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#endif /* _@GUARD_PREFIX@_ENDIAN_H */
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#endif /* _@GUARD_PREFIX@_ENDIAN_H */
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