Add endian.h.

libc/include/__/endian.h

@@ -0,0 +1,86 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    __/endian.h
+    Convert byte ordering of integers.
+
+*******************************************************************************/
+
+#ifndef INCLUDE____ENDIAN_H
+#define INCLUDE____ENDIAN_H
+
+#include <features.h>
+#include <__/byteswap.h>
+
+__BEGIN_DECLS
+
+/* The compiler provides the type constants. */
+#define __LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__
+#define __PDP_ENDIAN __ORDER_PDP_ENDIAN__
+#define __BIG_ENDIAN __ORDER_BIG_ENDIAN__
+
+/* The compiler also provides the local endianness as one of the above. */
+#define __BYTE_ORDER __BYTE_ORDER__
+#define __FLOAT_WORD_ORDER __FLOAT_WORD_ORDER__
+
+/* Declare conversion macros to allow easy endian conversion. */
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+
+	#define __htobe16(x) __bswap_16(x)
+	#define __htole16(x) (x)
+	#define __be16toh(x) __bswap_16(x)
+	#define __le16toh(x) (x)
+
+	#define __htobe32(x) __bswap_32(x)
+	#define __htole32(x) (x)
+	#define __be32toh(x) __bswap_32(x)
+	#define __le32toh(x) (x)
+
+	#define __htobe64(x) __bswap_64(x)
+	#define __htole64(x) (x)
+	#define __be64toh(x) __bswap_64(x)
+	#define __le64toh(x) (x)
+
+#elif __BYTE_ORDER == __BIG_ENDIAN
+
+	#define __htobe16(x) (x)
+	#define __htole16(x) __bswap_16(x)
+	#define __be16toh(x) (x)
+	#define __le16toh(x) __bswap_16(x)
+
+	#define __htobe32(x) (x)
+	#define __htole32(x) __bswap_32(x)
+	#define __be32toh(x) (x)
+	#define __le32toh(x) __bswap_32(x)
+
+	#define __htobe64(x) (x)
+	#define __htole64(x) __bswap_64(x)
+	#define __be64toh(x) (x)
+	#define __le64toh(x) __bswap_64(x)
+
+#else
+
+	#error Your processor uses a weird endian, please add support.
+
+#endif
+
+__END_DECLS
+
+#endif

libc/include/endian.h

@@ -0,0 +1,62 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+    This file is part of the Sortix C Library.
+
+    The Sortix C Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or (at your
+    option) any later version.
+
+    The Sortix C Library is distributed in the hope that it will be useful, but
+    WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+    or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
+
+    endian.h
+    Convert byte ordering of integers.
+
+*******************************************************************************/
+
+#ifndef _ENDIAN_H
+#define _ENDIAN_H 1
+
+#include <features.h>
+#include <__/endian.h>
+
+__BEGIN_DECLS
+
+/* Constans for each kind of known endian. */
+#define LITTLE_ENDIAN __LITTLE_ENDIAN
+#define PDP_ENDIAN __PDP_ENDIAN
+#define BIG_ENDIAN __BIG_ENDIAN
+
+/* Easy access to the current endian. */
+#define BYTE_ORDER __BYTE_ORDER
+#define FLOAT_WORD_ORDER __FLOAT_WORD_ORDER
+
+/* Easy conversion of 16-bit integers. */
+#define htobe16(x) __htobe16(x)
+#define htole16(x) __htole16(x)
+#define be16toh(x) __be16toh(x)
+#define le16toh(x) __le16toh(x)
+
+/* Easy conversion of 32-bit integers. */
+#define htobe32(x) __htobe32(x)
+#define htole32(x) __htole32(x)
+#define be32toh(x) __be32toh(x)
+#define le32toh(x) __le32toh(x)
+
+/* Easy conversion of 64-bit integers. */
+#define htobe64(x) __htobe64(x)
+#define htole64(x) __htole64(x)
+#define be64toh(x) __be64toh(x)
+#define le64toh(x) __le64toh(x)
+
+__END_DECLS
+
+#endif