Add endian.h.
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Jonas 'Sortie' Termansen
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library 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 published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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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 the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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__/endian.h
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Convert byte ordering of integers.
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*******************************************************************************/
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#ifndef INCLUDE____ENDIAN_H
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#define INCLUDE____ENDIAN_H
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#include <features.h>
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#include <__/byteswap.h>
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__BEGIN_DECLS
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/* The compiler provides the type constants. */
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#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
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#define __PDP_ENDIAN __ORDER_PDP_ENDIAN__
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#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
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/* The compiler also provides the local endianness as one of the above. */
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#define __BYTE_ORDER __BYTE_ORDER__
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#define __FLOAT_WORD_ORDER __FLOAT_WORD_ORDER__
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/* Declare conversion macros to allow easy endian conversion. */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define __htobe16(x) __bswap_16(x)
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#define __htole16(x) (x)
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#define __be16toh(x) __bswap_16(x)
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#define __le16toh(x) (x)
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#define __htobe32(x) __bswap_32(x)
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#define __htole32(x) (x)
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#define __be32toh(x) __bswap_32(x)
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#define __le32toh(x) (x)
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#define __htobe64(x) __bswap_64(x)
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#define __htole64(x) (x)
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#define __be64toh(x) __bswap_64(x)
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#define __le64toh(x) (x)
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#elif __BYTE_ORDER == __BIG_ENDIAN
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#define __htobe16(x) (x)
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#define __htole16(x) __bswap_16(x)
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#define __be16toh(x) (x)
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#define __le16toh(x) __bswap_16(x)
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#define __htobe32(x) (x)
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#define __htole32(x) __bswap_32(x)
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#define __be32toh(x) (x)
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#define __le32toh(x) __bswap_32(x)
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#define __htobe64(x) (x)
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#define __htole64(x) __bswap_64(x)
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#define __be64toh(x) (x)
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#define __le64toh(x) __bswap_64(x)
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#else
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#error Your processor uses a weird endian, please add support.
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#endif
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__END_DECLS
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#endif
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@ -0,0 +1,62 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013.
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This file is part of the Sortix C Library.
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The Sortix C Library 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 published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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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 the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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endian.h
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Convert byte ordering of integers.
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*******************************************************************************/
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#ifndef _ENDIAN_H
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#define _ENDIAN_H 1
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#include <features.h>
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#include <__/endian.h>
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__BEGIN_DECLS
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/* Constans for each kind of known endian. */
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#define LITTLE_ENDIAN __LITTLE_ENDIAN
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#define PDP_ENDIAN __PDP_ENDIAN
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#define BIG_ENDIAN __BIG_ENDIAN
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/* Easy access to the current endian. */
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#define BYTE_ORDER __BYTE_ORDER
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#define FLOAT_WORD_ORDER __FLOAT_WORD_ORDER
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/* Easy conversion of 16-bit integers. */
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#define htobe16(x) __htobe16(x)
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#define htole16(x) __htole16(x)
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#define be16toh(x) __be16toh(x)
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#define le16toh(x) __le16toh(x)
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/* Easy conversion of 32-bit integers. */
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#define htobe32(x) __htobe32(x)
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#define htole32(x) __htole32(x)
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#define be32toh(x) __be32toh(x)
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#define le32toh(x) __le32toh(x)
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/* Easy conversion of 64-bit integers. */
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#define htobe64(x) __htobe64(x)
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#define htole64(x) __htole64(x)
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#define be64toh(x) __be64toh(x)
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#define le64toh(x) __le64toh(x)
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__END_DECLS
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#endif
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