Beginnings of a new, better portable FS shell with Haiku FS interface.

Doesn't do anything ATM, but already provides the required system
interface (VFS, caches, POSIX functions).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20859 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/fs_shell/fssh_byte_order.h

@@ -0,0 +1,131 @@
+/*
+ * Copyright 2007, Haiku, Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _FSSH_BYTEORDER_H
+#define _FSSH_BYTEORDER_H
+
+#include <endian.h>
+	// platform endian.h
+
+
+#include "fssh_defs.h"
+
+
+// swap directions
+typedef enum {
+	FSSH_B_SWAP_HOST_TO_LENDIAN,
+	FSSH_B_SWAP_HOST_TO_BENDIAN,
+	FSSH_B_SWAP_LENDIAN_TO_HOST,
+	FSSH_B_SWAP_BENDIAN_TO_HOST,
+	FSSH_B_SWAP_ALWAYS
+} fssh_swap_action;
+
+
+// BSD/networking macros
+#ifndef fssh_htonl
+#	define fssh_htonl(x) FSSH_B_HOST_TO_BENDIAN_INT32(x)
+#	define fssh_ntohl(x) FSSH_B_BENDIAN_TO_HOST_INT32(x)
+#	define fssh_htons(x) FSSH_B_HOST_TO_BENDIAN_INT16(x)
+#	define fssh_ntohs(x) FSSH_B_BENDIAN_TO_HOST_INT16(x)
+#endif
+
+// always swap macros
+#define FSSH_B_SWAP_DOUBLE(arg)   __fssh_swap_double(arg)
+#define FSSH_B_SWAP_FLOAT(arg)    __fssh_swap_float(arg)
+#define FSSH_B_SWAP_INT64(arg)    __fssh_swap_int64(arg)
+#define FSSH_B_SWAP_INT32(arg)    __fssh_swap_int32(arg)
+#define FSSH_B_SWAP_INT16(arg)    __fssh_swap_int16(arg)
+
+#if BYTE_ORDER == __LITTLE_ENDIAN
+// Host is little endian
+
+#define FSSH_B_HOST_IS_LENDIAN 1
+#define FSSH_B_HOST_IS_BENDIAN 0
+
+// Host native to little endian
+#define FSSH_B_HOST_TO_LENDIAN_DOUBLE(arg)	(double)(arg)
+#define FSSH_B_HOST_TO_LENDIAN_FLOAT(arg)	(float)(arg)
+#define FSSH_B_HOST_TO_LENDIAN_INT64(arg)	(uint64_t)(arg)
+#define FSSH_B_HOST_TO_LENDIAN_INT32(arg)	(uint32_t)(arg)
+#define FSSH_B_HOST_TO_LENDIAN_INT16(arg)	(uint16_t)(arg)
+
+// Little endian to host native
+#define FSSH_B_LENDIAN_TO_HOST_DOUBLE(arg)	(double)(arg)
+#define FSSH_B_LENDIAN_TO_HOST_FLOAT(arg)	(float)(arg)
+#define FSSH_B_LENDIAN_TO_HOST_INT64(arg)	(uint64_t)(arg)
+#define FSSH_B_LENDIAN_TO_HOST_INT32(arg)	(uint32_t)(arg)
+#define FSSH_B_LENDIAN_TO_HOST_INT16(arg)	(uint16_t)(arg)
+
+// Host native to big endian
+#define FSSH_B_HOST_TO_BENDIAN_DOUBLE(arg)	__fssh_swap_double(arg)
+#define FSSH_B_HOST_TO_BENDIAN_FLOAT(arg)	__fssh_swap_float(arg)
+#define FSSH_B_HOST_TO_BENDIAN_INT64(arg)	__fssh_swap_int64(arg)
+#define FSSH_B_HOST_TO_BENDIAN_INT32(arg)	__fssh_swap_int32(arg)
+#define FSSH_B_HOST_TO_BENDIAN_INT16(arg)	__fssh_swap_int16(arg)
+
+// Big endian to host native
+#define FSSH_B_BENDIAN_TO_HOST_DOUBLE(arg)	__fssh_swap_double(arg)
+#define FSSH_B_BENDIAN_TO_HOST_FLOAT(arg)	__fssh_swap_float(arg)
+#define FSSH_B_BENDIAN_TO_HOST_INT64(arg)	__fssh_swap_int64(arg)
+#define FSSH_B_BENDIAN_TO_HOST_INT32(arg)	__fssh_swap_int32(arg)
+#define FSSH_B_BENDIAN_TO_HOST_INT16(arg)	__fssh_swap_int16(arg)
+
+#else	// BYTE_ORDER
+// Host is big endian
+
+#define FSSH_B_HOST_IS_LENDIAN 0
+#define FSSH_B_HOST_IS_BENDIAN 1
+
+// Host native to little endian
+#define FSSH_B_HOST_TO_LENDIAN_DOUBLE(arg)	__fssh_swap_double(arg)
+#define FSSH_B_HOST_TO_LENDIAN_FLOAT(arg)	__fssh_swap_float(arg)
+#define FSSH_B_HOST_TO_LENDIAN_INT64(arg)	__fssh_swap_int64(arg)
+#define FSSH_B_HOST_TO_LENDIAN_INT32(arg)	__fssh_swap_int32(arg)
+#define FSSH_B_HOST_TO_LENDIAN_INT16(arg)	__fssh_swap_int16(arg)
+
+// Little endian to host native
+#define FSSH_B_LENDIAN_TO_HOST_DOUBLE(arg)	__fssh_swap_double(arg)
+#define FSSH_B_LENDIAN_TO_HOST_FLOAT(arg)	__fssh_swap_float(arg)
+#define FSSH_B_LENDIAN_TO_HOST_INT64(arg)	__fssh_swap_int64(arg)
+#define FSSH_B_LENDIAN_TO_HOST_INT32(arg)	__fssh_swap_int32(arg)
+#define FSSH_B_LENDIAN_TO_HOST_INT16(arg)	__fssh_swap_int16(arg)
+
+// Host native to big endian
+#define FSSH_B_HOST_TO_BENDIAN_DOUBLE(arg)	(double)(arg)
+#define FSSH_B_HOST_TO_BENDIAN_FLOAT(arg)	(float)(arg)
+#define FSSH_B_HOST_TO_BENDIAN_INT64(arg)	(uint64_t)(arg)
+#define FSSH_B_HOST_TO_BENDIAN_INT32(arg)	(uint32_t)(arg)
+#define FSSH_B_HOST_TO_BENDIAN_INT16(arg)	(uint16_t)(arg)
+
+// Big endian to host native
+#define FSSH_B_BENDIAN_TO_HOST_DOUBLE(arg)	(double)(arg)
+#define FSSH_B_BENDIAN_TO_HOST_FLOAT(arg)	(float)(arg)
+#define FSSH_B_BENDIAN_TO_HOST_INT64(arg)	(uint64_t)(arg)
+#define FSSH_B_BENDIAN_TO_HOST_INT32(arg)	(uint32_t)(arg)
+#define FSSH_B_BENDIAN_TO_HOST_INT16(arg)	(uint16_t)(arg)
+
+#endif	// BYTE_ORDER
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif 
+
+extern fssh_status_t fssh_swap_data(fssh_type_code type, void *data,
+	fssh_size_t length, fssh_swap_action action);
+extern bool is_type_swapped(fssh_type_code type);
+
+
+// Private implementations
+extern double __fssh_swap_double(double arg);
+extern float  __fssh_swap_float(float arg);
+extern uint64_t __fssh_swap_int64(uint64_t arg);
+extern uint32_t __fssh_swap_int32(uint32_t arg);
+extern uint16_t __fssh_swap_int16(uint16_t arg);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif	// _FSSH_BYTEORDER_H