[mirror_edk2.git] / ShellPkg / Include / Library / FileHandleLib.h

/** @file\r
  Provides interface to EFI_FILE_HANDLE functionality.\r
\r
Copyright (c) 2006 - 2009, Intel Corporation\r
All rights reserved. This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#include <Uefi.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
\r
/**\r
  This function will retrieve the information about the file for the handle \r
  specified and store it in allocated pool memory.\r
\r
  This function allocates a buffer to store the file's information. It is the \r
  caller's responsibility to free the buffer\r
\r
  @param  FileHandle  The file handle of the file for which information is \r
  being requested.\r
\r
  @retval NULL information could not be retrieved.\r
\r
  @return the information about the file\r
**/\r
EFI_FILE_INFO*\r
EFIAPI\r
FileHandleGetInfo (\r
  IN EFI_FILE_HANDLE            FileHandle\r
  );\r
\r
/**\r
  This function will set the information about the file for the opened handle \r
  specified.\r
\r
  @param  FileHandle            The file handle of the file for which information \r
  is being set\r
\r
  @param  FileInfo              The infotmation to set.\r
\r
  @retval EFI_SUCCESS		The information was set.\r
  @retval EFI_UNSUPPORTED The InformationType is not known.\r
  @retval EFI_NO_MEDIA		The device has no medium.\r
  @retval EFI_DEVICE_ERROR	The device reported an error.\r
  @retval EFI_VOLUME_CORRUPTED	The file system structures are corrupted.\r
  @retval EFI_WRITE_PROTECTED	The file or medium is write protected.\r
  @retval EFI_ACCESS_DENIED	The file was opened read only.\r
  @retval EFI_VOLUME_FULL	The volume is full.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleSetInfo (\r
  IN EFI_FILE_HANDLE  	        FileHandle,\r
  IN CONST EFI_FILE_INFO        *FileInfo\r
  );\r
\r
/**\r
  This function reads information from an opened file.\r
\r
  If FileHandle is not a directory, the function reads the requested number of \r
  bytes from the file at the file's current position and returns them in Buffer. \r
  If the read goes beyond the end of the file, the read length is truncated to the\r
  end of the file. The file's current position is increased by the number of bytes \r
  returned.  If FileHandle is a directory, the function reads the directory entry \r
  at the file's current position and returns the entry in Buffer. If the Buffer \r
  is not large enough to hold the current directory entry, then \r
  EFI_BUFFER_TOO_SMALL is returned and the current file position is not updated. \r
  BufferSize is set to be the size of the buffer needed to read the entry. On \r
  success, the current position is updated to the next directory entry. If there \r
  are no more directory entries, the read returns a zero-length buffer. \r
  EFI_FILE_INFO is the structure returned as the directory entry.\r
\r
  @param FileHandle             the opened file handle\r
  @param BufferSize             on input the size of buffer in bytes.  on return \r
                                the number of bytes written.\r
  @param Buffer                 the buffer to put read data into.\r
\r
  @retval EFI_SUCCESS	          Data was read.\r
  @retval EFI_NO_MEDIA	        The device has no media.\r
  @retval EFI_DEVICE_ERROR	The device reported an error.\r
  @retval EFI_VOLUME_CORRUPTED	The file system structures are corrupted.\r
  @retval EFI_BUFFER_TO_SMALL	Buffer is too small. ReadSize contains required \r
                                size.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleRead(\r
  IN EFI_FILE_HANDLE            FileHandle,\r
  IN OUT UINTN                  *BufferSize,\r
  OUT VOID                      *Buffer\r
  );\r
\r
/**\r
  Write data to a file.\r
\r
  This function writes the specified number of bytes to the file at the current \r
  file position. The current file position is advanced the actual number of bytes \r
  written, which is returned in BufferSize. Partial writes only occur when there \r
  has been a data error during the write attempt (such as "volume space full"). \r
  The file is automatically grown to hold the data if required. Direct writes to \r
  opened directories are not supported.\r
\r
  @param FileHandle           The opened file for writing\r
  @param BufferSize           on input the number of bytes in Buffer.  On output\r
                              the number of bytes written.\r
  @param Buffer               the buffer containing data to write is stored.\r
\r
 @retval EFI_SUCCESS	        Data was written.\r
 @retval EFI_UNSUPPORTED	    Writes to an open directory are not supported.\r
 @retval EFI_NO_MEDIA	        The device has no media.\r
 @retval EFI_DEVICE_ERROR	    The device reported an error.\r
 @retval EFI_VOLUME_CORRUPTED	The file system structures are corrupted.\r
 @retval EFI_WRITE_PROTECTED	The device is write-protected.\r
 @retval EFI_ACCESS_DENIED	  The file was open for read only.\r
 @retval EFI_VOLUME_FULL	    The volume is full.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleWrite(\r
  IN EFI_FILE_HANDLE            FileHandle,\r
  IN OUT UINTN                  *BufferSize,\r
  IN VOID                       *Buffer\r
  );\r
\r
/** \r
  Close an open file handle.\r
\r
  This function closes a specified file handle. All "dirty" cached file data is \r
  flushed to the device, and the file is closed. In all cases the handle is \r
  closed.\r
\r
@param FileHandle               the file handle to close.\r
\r
@retval EFI_SUCCESS             the file handle was closed sucessfully.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleClose (\r
  IN EFI_FILE_HANDLE            FileHandle\r
  );\r
\r
/**\r
  Delete a file and close the handle\r
\r
  This function closes and deletes a file. In all cases the file handle is closed.\r
  If the file cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is \r
  returned, but the handle is still closed.\r
\r
  @param FileHandle             the file handle to delete\r
\r
  @retval EFI_SUCCESS           the file was closed sucessfully\r
  @retval EFI_WARN_DELETE_FAILURE the handle was closed, but the file was not \r
                                deleted\r
  @retval INVALID_PARAMETER    	One of the parameters has an invalid value.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleDelete (\r
  IN EFI_FILE_HANDLE		FileHandle\r
  );\r
\r
/**\r
  Set the current position in a file.\r
\r
  This function sets the current file position for the handle to the position \r
  supplied. With the exception of seeking to position 0xFFFFFFFFFFFFFFFF, only\r
  absolute positioning is supported, and seeking past the end of the file is \r
  allowed (a subsequent write would grow the file). Seeking to position \r
  0xFFFFFFFFFFFFFFFF causes the current position to be set to the end of the file.\r
  If FileHandle is a directory, the only position that may be set is zero. This \r
  has the effect of starting the read process of the directory entries over.\r
\r
  @param FileHandle             The file handle on which the position is being set\r
  @param Position               Byte position from begining of file\r
\r
  @retval EFI_SUCCESS           Operation completed sucessfully.\r
  @retval EFI_UNSUPPORTED       the seek request for non-zero is not valid on \r
                                directories.\r
  @retval INVALID_PARAMETER     One of the parameters has an invalid value.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleSetPosition (\r
  IN EFI_FILE_HANDLE   	FileHandle,\r
  IN UINT64           	Position\r
  );\r
\r
/** \r
  Gets a file's current position\r
\r
  This function retrieves the current file position for the file handle. For \r
  directories, the current file position has no meaning outside of the file \r
  system driver and as such the operation is not supported. An error is returned\r
  if FileHandle is a directory.\r
\r
  @param FileHandle             The open file handle on which to get the position.\r
  @param Position               Byte position from begining of file.\r
\r
  @retval EFI_SUCCESS           the operation completed sucessfully.\r
  @retval INVALID_PARAMETER     One of the parameters has an invalid value.\r
  @retval EFI_UNSUPPORTED       the request is not valid on directories.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleGetPosition (\r
  IN EFI_FILE_HANDLE            FileHandle,\r
  OUT UINT64                    *Position\r
  );\r
/**\r
  Flushes data on a file\r
  \r
  This function flushes all modified data associated with a file to a device.\r
\r
  @param FileHandle             The file handle on which to flush data\r
\r
  @retval EFI_SUCCESS           The data was flushed.\r
  @retval EFI_NO_MEDIA          The device has no media.\r
  @retval EFI_DEVICE_ERROR      The device reported an error.\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted.\r
  @retval EFI_WRITE_PROTECTED   The file or medium is write protected.\r
  @retval EFI_ACCESS_DENIED     The file was opened for read only.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleFlush (\r
  IN EFI_FILE_HANDLE            FileHandle\r
  );\r
\r
/**\r
  function to determine if a given handle is a directory handle\r
\r
  if DirHandle is NULL then ASSERT()\r
\r
  open the file information on the DirHandle and verify that the Attribute\r
  includes EFI_FILE_DIRECTORY bit set.\r
\r
  @param DirHandle              Handle to open file\r
\r
  @retval EFI_SUCCESS           DirHandle is a directory\r
  @retval EFI_INVALID_PARAMETER DirHandle did not have EFI_FILE_INFO available\r
  @retval EFI_NOT_FOUND         DirHandle is not a directory\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleIsDirectory (\r
  IN EFI_FILE_HANDLE            DirHandle\r
  );\r
\r
/**\r
  Retrieves the first file from a directory\r
\r
  This function opens a directory and gets the first file's info in the \r
  directory. Caller can use FileHandleFindNextFile() to get other files.  When \r
  complete the caller is responsible for calling FreePool() on *Buffer.\r
\r
  @param DirHandle              The file handle of the directory to search\r
  @param Buffer                 Pointer to pointer to buffer for file's information\r
\r
  @retval EFI_SUCCESS           Found the first file.\r
  @retval EFI_NOT_FOUND         Cannot find the directory.\r
  @retval EFI_NO_MEDIA          The device has no media.\r
  @retval EFI_DEVICE_ERROR      The device reported an error.\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted.\r
  @return Others                status of FileHandleGetInfo, FileHandleSetPosition,\r
                                or FileHandleRead\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleFindFirstFile (\r
  IN EFI_FILE_HANDLE            DirHandle,\r
  OUT EFI_FILE_INFO             **Buffer\r
  );\r
/**\r
  Retrieves the next file in a directory.\r
\r
  To use this function, caller must call the FileHandleFindFirstFile() to get the \r
  first file, and then use this function get other files. This function can be \r
  called for several times to get each file's information in the directory. If \r
  the call of FileHandleFindNextFile() got the last file in the directory, the next \r
  call of this function has no file to get. *NoFile will be set to TRUE and the \r
  Buffer memory will be automatically freed. \r
\r
  @param DirHandle              the file handle of the directory\r
  @param Buffer			            pointer to buffer for file's information\r
  @param NoFile			            pointer to boolean when last file is found\r
\r
  @retval EFI_SUCCESS           Found the next file, or reached last file\r
  @retval EFI_NO_MEDIA          The device has no media.\r
  @retval EFI_DEVICE_ERROR      The device reported an error.\r
  @retval EFI_VOLUME_CORRUPTED  The file system structures are corrupted.\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleFindNextFile(\r
  IN EFI_FILE_HANDLE             DirHandle,\r
  OUT EFI_FILE_INFO              *Buffer,\r
  OUT BOOLEAN                    *NoFile\r
  );\r
\r
/**\r
  Retrieve the size of a file.\r
\r
  if FileHandle is NULL then ASSERT()\r
  if Size is NULL then ASSERT()\r
\r
  This function extracts the file size info from the FileHandle's EFI_FILE_INFO \r
  data.\r
\r
  @param FileHandle             file handle from which size is retrieved\r
  @param Size                   pointer to size\r
\r
  @retval EFI_SUCCESS           operation was completed sucessfully\r
  @retval EFI_DEVICE_ERROR      cannot access the file\r
**/\r
EFI_STATUS\r
EFIAPI\r
FileHandleGetSize (\r
  IN EFI_FILE_HANDLE            FileHandle,\r
  OUT UINT64                    *Size\r
  );
Commit	Line	Data
d2b4564b	1	/** @file\r
	2	Provides interface to EFI_FILE_HANDLE functionality.\r
	3	\r
	4	Copyright (c) 2006 - 2009, Intel Corporation\r
	5	All rights reserved. This program and the accompanying materials\r
	6	are licensed and made available under the terms and conditions of the BSD License\r
	7	which accompanies this distribution. The full text of the license may be found at\r
	8	http://opensource.org/licenses/bsd-license.php\r
	9	\r
	10	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	\r
	13	**/\r
	14	\r
	15	#include <Uefi.h>\r
	16	#include <Library/UefiBootServicesTableLib.h>\r
	17	#include <Library/BaseLib.h>\r
	18	#include <Library/BaseMemoryLib.h>\r
	19	#include <Library/DebugLib.h>\r
	20	#include <Library/MemoryAllocationLib.h>\r
	21	\r
	22	/**\r
	23	This function will retrieve the information about the file for the handle \r
	24	specified and store it in allocated pool memory.\r
	25	\r
69817bf8	26	This function allocates a buffer to store the file's information. It is the \r
69817bf8	27	caller's responsibility to free the buffer\r
d2b4564b	28	\r
	29	@param FileHandle The file handle of the file for which information is \r
	30	being requested.\r
	31	\r
	32	@retval NULL information could not be retrieved.\r
	33	\r
	34	@return the information about the file\r
	35	**/\r
	36	EFI_FILE_INFO*\r
	37	EFIAPI\r
	38	FileHandleGetInfo (\r
	39	IN EFI_FILE_HANDLE FileHandle\r
	40	);\r
	41	\r
	42	/**\r
	43	This function will set the information about the file for the opened handle \r
	44	specified.\r
	45	\r
	46	@param FileHandle The file handle of the file for which information \r
	47	is being set\r
	48	\r
	49	@param FileInfo The infotmation to set.\r
	50	\r
	51	@retval EFI_SUCCESS The information was set.\r
	52	@retval EFI_UNSUPPORTED The InformationType is not known.\r
	53	@retval EFI_NO_MEDIA The device has no medium.\r
	54	@retval EFI_DEVICE_ERROR The device reported an error.\r
	55	@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
	56	@retval EFI_WRITE_PROTECTED The file or medium is write protected.\r
	57	@retval EFI_ACCESS_DENIED The file was opened read only.\r
	58	@retval EFI_VOLUME_FULL The volume is full.\r
	59	**/\r
	60	EFI_STATUS\r
	61	EFIAPI\r
	62	FileHandleSetInfo (\r
	63	IN EFI_FILE_HANDLE FileHandle,\r
	64	IN CONST EFI_FILE_INFO *FileInfo\r
	65	);\r
	66	\r
	67	/**\r
	68	This function reads information from an opened file.\r
	69	\r
	70	If FileHandle is not a directory, the function reads the requested number of \r
69817bf8	71	bytes from the file at the file's current position and returns them in Buffer. \r
d2b4564b	72	If the read goes beyond the end of the file, the read length is truncated to the\r
69817bf8	73	end of the file. The file's current position is increased by the number of bytes \r
d2b4564b	74	returned. If FileHandle is a directory, the function reads the directory entry \r
69817bf8	75	at the file's current position and returns the entry in Buffer. If the Buffer \r
d2b4564b	76	is not large enough to hold the current directory entry, then \r
	77	EFI_BUFFER_TOO_SMALL is returned and the current file position is not updated. \r
	78	BufferSize is set to be the size of the buffer needed to read the entry. On \r
	79	success, the current position is updated to the next directory entry. If there \r
	80	are no more directory entries, the read returns a zero-length buffer. \r
	81	EFI_FILE_INFO is the structure returned as the directory entry.\r
	82	\r
	83	@param FileHandle the opened file handle\r
	84	@param BufferSize on input the size of buffer in bytes. on return \r
	85	the number of bytes written.\r
	86	@param Buffer the buffer to put read data into.\r
	87	\r
	88	@retval EFI_SUCCESS Data was read.\r
	89	@retval EFI_NO_MEDIA The device has no media.\r
	90	@retval EFI_DEVICE_ERROR The device reported an error.\r
	91	@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
	92	@retval EFI_BUFFER_TO_SMALL Buffer is too small. ReadSize contains required \r
	93	size.\r
	94	\r
	95	**/\r
	96	EFI_STATUS\r
	97	EFIAPI\r
	98	FileHandleRead(\r
	99	IN EFI_FILE_HANDLE FileHandle,\r
	100	IN OUT UINTN *BufferSize,\r
	101	OUT VOID *Buffer\r
	102	);\r
	103	\r
	104	/**\r
	105	Write data to a file.\r
	106	\r
	107	This function writes the specified number of bytes to the file at the current \r
	108	file position. The current file position is advanced the actual number of bytes \r
	109	written, which is returned in BufferSize. Partial writes only occur when there \r
69817bf8	110	has been a data error during the write attempt (such as "volume space full"). \r
d2b4564b	111	The file is automatically grown to hold the data if required. Direct writes to \r
	112	opened directories are not supported.\r
	113	\r
	114	@param FileHandle The opened file for writing\r
	115	@param BufferSize on input the number of bytes in Buffer. On output\r
	116	the number of bytes written.\r
	117	@param Buffer the buffer containing data to write is stored.\r
	118	\r
	119	@retval EFI_SUCCESS Data was written.\r
	120	@retval EFI_UNSUPPORTED Writes to an open directory are not supported.\r
	121	@retval EFI_NO_MEDIA The device has no media.\r
	122	@retval EFI_DEVICE_ERROR The device reported an error.\r
	123	@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
	124	@retval EFI_WRITE_PROTECTED The device is write-protected.\r
	125	@retval EFI_ACCESS_DENIED The file was open for read only.\r
	126	@retval EFI_VOLUME_FULL The volume is full.\r
	127	**/\r
	128	EFI_STATUS\r
	129	EFIAPI\r
	130	FileHandleWrite(\r
	131	IN EFI_FILE_HANDLE FileHandle,\r
	132	IN OUT UINTN *BufferSize,\r
	133	IN VOID *Buffer\r
	134	);\r
	135	\r
	136	/** \r
	137	Close an open file handle.\r
	138	\r
69817bf8	139	This function closes a specified file handle. All "dirty" cached file data is \r
d2b4564b	140	flushed to the device, and the file is closed. In all cases the handle is \r
	141	closed.\r
	142	\r
	143	@param FileHandle the file handle to close.\r
	144	\r
	145	@retval EFI_SUCCESS the file handle was closed sucessfully.\r
	146	**/\r
	147	EFI_STATUS\r
	148	EFIAPI\r
	149	FileHandleClose (\r
	150	IN EFI_FILE_HANDLE FileHandle\r
	151	);\r
	152	\r
	153	/**\r
	154	Delete a file and close the handle\r
	155	\r
	156	This function closes and deletes a file. In all cases the file handle is closed.\r
	157	If the file cannot be deleted, the warning code EFI_WARN_DELETE_FAILURE is \r
	158	returned, but the handle is still closed.\r
	159	\r
	160	@param FileHandle the file handle to delete\r
	161	\r
	162	@retval EFI_SUCCESS the file was closed sucessfully\r
	163	@retval EFI_WARN_DELETE_FAILURE the handle was closed, but the file was not \r
	164	deleted\r
	165	@retval INVALID_PARAMETER One of the parameters has an invalid value.\r
	166	**/\r
	167	EFI_STATUS\r
	168	EFIAPI\r
	169	FileHandleDelete (\r
	170	IN EFI_FILE_HANDLE FileHandle\r
	171	);\r
	172	\r
	173	/**\r
	174	Set the current position in a file.\r
	175	\r
	176	This function sets the current file position for the handle to the position \r
	177	supplied. With the exception of seeking to position 0xFFFFFFFFFFFFFFFF, only\r
	178	absolute positioning is supported, and seeking past the end of the file is \r
	179	allowed (a subsequent write would grow the file). Seeking to position \r
	180	0xFFFFFFFFFFFFFFFF causes the current position to be set to the end of the file.\r
	181	If FileHandle is a directory, the only position that may be set is zero. This \r
	182	has the effect of starting the read process of the directory entries over.\r
	183	\r
	184	@param FileHandle The file handle on which the position is being set\r
	185	@param Position Byte position from begining of file\r
	186	\r
	187	@retval EFI_SUCCESS Operation completed sucessfully.\r
	188	@retval EFI_UNSUPPORTED the seek request for non-zero is not valid on \r
	189	directories.\r
	190	@retval INVALID_PARAMETER One of the parameters has an invalid value.\r
	191	**/\r
	192	EFI_STATUS\r
	193	EFIAPI\r
	194	FileHandleSetPosition (\r
	195	IN EFI_FILE_HANDLE FileHandle,\r
	196	IN UINT64 Position\r
	197	);\r
	198	\r
	199	/** \r
	200	Gets a file's current position\r
	201	\r
	202	This function retrieves the current file position for the file handle. For \r
	203	directories, the current file position has no meaning outside of the file \r
204	system driver and as such the operation is not supported. An error is returned\r
205	if FileHandle is a directory.\r
206	\r
207	@param FileHandle The open file handle on which to get the position.\r
208	@param Position Byte position from begining of file.\r
209	\r
210	@retval EFI_SUCCESS the operation completed sucessfully.\r
211	@retval INVALID_PARAMETER One of the parameters has an invalid value.\r
212	@retval EFI_UNSUPPORTED the request is not valid on directories.\r
213	**/\r
214	EFI_STATUS\r
215	EFIAPI\r
216	FileHandleGetPosition (\r
217	IN EFI_FILE_HANDLE FileHandle,\r
218	OUT UINT64 *Position\r
219	);\r
220	/**\r
221	Flushes data on a file\r
222	\r
223	This function flushes all modified data associated with a file to a device.\r
224	\r
225	@param FileHandle The file handle on which to flush data\r
226	\r
227	@retval EFI_SUCCESS The data was flushed.\r
228	@retval EFI_NO_MEDIA The device has no media.\r
229	@retval EFI_DEVICE_ERROR The device reported an error.\r
230	@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
231	@retval EFI_WRITE_PROTECTED The file or medium is write protected.\r
232	@retval EFI_ACCESS_DENIED The file was opened for read only.\r
233	**/\r
234	EFI_STATUS\r
235	EFIAPI\r
236	FileHandleFlush (\r
237	IN EFI_FILE_HANDLE FileHandle\r
238	);\r
239	\r
240	/**\r
241	function to determine if a given handle is a directory handle\r
242	\r
243	if DirHandle is NULL then ASSERT()\r
244	\r
245	open the file information on the DirHandle and verify that the Attribute\r
246	includes EFI_FILE_DIRECTORY bit set.\r
247	\r
248	@param DirHandle Handle to open file\r
249	\r
250	@retval EFI_SUCCESS DirHandle is a directory\r
251	@retval EFI_INVALID_PARAMETER DirHandle did not have EFI_FILE_INFO available\r
252	@retval EFI_NOT_FOUND DirHandle is not a directory\r
253	**/\r
254	EFI_STATUS\r
255	EFIAPI\r
256	FileHandleIsDirectory (\r
257	IN EFI_FILE_HANDLE DirHandle\r
258	);\r
259	\r
260	/**\r
261	Retrieves the first file from a directory\r
262	\r
69817bf8	263	This function opens a directory and gets the first file's info in the \r
d2b4564b	264	directory. Caller can use FileHandleFindNextFile() to get other files. When \r
	265	complete the caller is responsible for calling FreePool() on *Buffer.\r
	266	\r
	267	@param DirHandle The file handle of the directory to search\r
	268	@param Buffer Pointer to pointer to buffer for file's information\r
	269	\r
	270	@retval EFI_SUCCESS Found the first file.\r
	271	@retval EFI_NOT_FOUND Cannot find the directory.\r
	272	@retval EFI_NO_MEDIA The device has no media.\r
	273	@retval EFI_DEVICE_ERROR The device reported an error.\r
	274	@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
	275	@return Others status of FileHandleGetInfo, FileHandleSetPosition,\r
	276	or FileHandleRead\r
	277	**/\r
	278	EFI_STATUS\r
	279	EFIAPI\r
	280	FileHandleFindFirstFile (\r
	281	IN EFI_FILE_HANDLE DirHandle,\r
	282	OUT EFI_FILE_INFO **Buffer\r
	283	);\r
	284	/**\r
	285	Retrieves the next file in a directory.\r
	286	\r
	287	To use this function, caller must call the FileHandleFindFirstFile() to get the \r
	288	first file, and then use this function get other files. This function can be \r
	289	called for several times to get each file's information in the directory. If \r
	290	the call of FileHandleFindNextFile() got the last file in the directory, the next \r
	291	call of this function has no file to get. *NoFile will be set to TRUE and the \r
	292	Buffer memory will be automatically freed. \r
	293	\r
	294	@param DirHandle the file handle of the directory\r
	295	@param Buffer pointer to buffer for file's information\r
	296	@param NoFile pointer to boolean when last file is found\r
	297	\r
	298	@retval EFI_SUCCESS Found the next file, or reached last file\r
	299	@retval EFI_NO_MEDIA The device has no media.\r
	300	@retval EFI_DEVICE_ERROR The device reported an error.\r
	301	@retval EFI_VOLUME_CORRUPTED The file system structures are corrupted.\r
	302	**/\r
	303	EFI_STATUS\r
	304	EFIAPI\r
	305	FileHandleFindNextFile(\r
	306	IN EFI_FILE_HANDLE DirHandle,\r
	307	OUT EFI_FILE_INFO *Buffer,\r
	308	OUT BOOLEAN *NoFile\r
	309	);\r
	310	\r
	311	/**\r
	312	Retrieve the size of a file.\r
	313	\r
	314	if FileHandle is NULL then ASSERT()\r
	315	if Size is NULL then ASSERT()\r
	316	\r
69817bf8	317	This function extracts the file size info from the FileHandle's EFI_FILE_INFO \r
d2b4564b	318	data.\r
	319	\r
	320	@param FileHandle file handle from which size is retrieved\r
	321	@param Size pointer to size\r
	322	\r
	323	@retval EFI_SUCCESS operation was completed sucessfully\r
	324	@retval EFI_DEVICE_ERROR cannot access the file\r
	325	**/\r
	326	EFI_STATUS\r
	327	EFIAPI\r
	328	FileHandleGetSize (\r
	329	IN EFI_FILE_HANDLE FileHandle,\r
	330	OUT UINT64 *Size\r
	331	);