add nativeapis

Signed-off-by: Nzengyawen <zengyawen1@huawei.com>

en/application-dev/reference/native-apis/raw__file_8h.md

+# raw_file.h
+
+
+## Overview
+
+Provides functions for operating rawfiles.
+
+These functions include searching, reading, and closing rawfiles.
+
+**Since:**
+8
+
+**Related Modules:**
+
+[Rawfile](rawfile.md)
+
+
+## Summary
+
+
+### Structs
+
+| Name | Description | 
+| -------- | -------- |
+| [RawFileDescriptor](_raw_file_descriptor.md) | Provides rawfile descriptor information.  | 
+
+
+### Types
+
+| Name | Description | 
+| -------- | -------- |
+| [RawFile](rawfile.md#rawfile) | Provides the function of accessing rawfiles.  | 
+
+
+### Functions
+
+| Name | Description | 
+| -------- | -------- |
+| [OH_ResourceManager_ReadRawFile](rawfile.md#oh_resourcemanager_readrawfile) (const [RawFile](rawfile.md#rawfile) \*rawFile, void \*buf, size_t length) |Reads a rawfile.  | 
+| [OH_ResourceManager_SeekRawFile](rawfile.md#oh_resourcemanager_seekrawfile) (const [RawFile](rawfile.md#rawfile) \*rawFile, long offset, int whence) |Seeks for the data read/write position in the rawfile based on the specified offset.  | 
+| [OH_ResourceManager_GetRawFileSize](rawfile.md#oh_resourcemanager_getrawfilesize) ([RawFile](rawfile.md#rawfile) \*rawFile) | Obtains the length of a rawfile in int32_t.  | 
+| [OH_ResourceManager_CloseRawFile](rawfile.md#oh_resourcemanager_closerawfile) ([RawFile](rawfile.md#rawfile) \*rawFile) | Closes an opened [RawFile](rawfile.md#rawfile) and releases all associated resources.  | 
+| [OH_ResourceManager_GetRawFileOffset](rawfile.md#oh_resourcemanager_getrawfileoffset) (const [RawFile](rawfile.md#rawfile) \*rawFile) | Obtains the current offset of the rawfile in int32_t.  | 
+| [OH_ResourceManager_GetRawFileDescriptor](rawfile.md#oh_resourcemanager_getrawfiledescriptor) (const [RawFile](rawfile.md#rawfile) \*rawFile, [RawFileDescriptor](_raw_file_descriptor.md) &descriptor) | Opens a rawfile descriptor.  | 
+| [OH_ResourceManager_ReleaseRawFileDescriptor](rawfile.md#oh_resourcemanager_releaserawfiledescriptor) (const [RawFileDescriptor](_raw_file_descriptor.md) &descriptor) | Closes a rawfile descriptor.  |