fs: Add Zephyr File System API

Adds the header files containing Zephyr File System API
descriptions and interfaces.

Origin: Original
Jira: ZEP-228 ZEP-480
Change-Id: I76a000187a133df7a82329af78aec9ea6511915c
Signed-off-by: Ramesh Thomas <ramesh.thomas@intel.com>

include/fs/fs_interface.h

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2016 Intel Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _FS_INTERFACE_H_
+#define _FS_INTERFACE_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * @brief Macro to define _zfile_object structure
+ *
+ * This structure contains information about the open files. This
+ * structure will be passed to the api functions as an opaque
+ * pointer.
+ *
+ * @param _file_object File structure used by underlying file system
+ */
+
+#define ZFILE_DEFINE(_file_object) \
+	struct _zfile_object { \
+		_file_object; \
+	}
+
+/*
+ * @brief Macro to define _zdir_object structure
+ *
+ * This structure contains information about the open directories. This
+ * structure will be passed to the directory api functions as an opaque
+ * pointer.
+ *
+ * @param _dir_object Directory structure used by underlying file system
+ */
+
+#define ZDIR_DEFINE(_dir_object) \
+	struct _zdir_object { \
+		_dir_object; \
+	}
+
+#ifdef CONFIG_FILE_SYSTEM_FAT
+#include <fs/fat_fs.h>
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _FS_INTERFACE_H_ */