Convert macros in the DevicePathLib to functions.

Addresses coding convention issues in the DevicePathLib
Should not cause any compatibility issues with any existing modules.
Adds ASSERT() checks for NULL device path nodes passed into these functions.


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@7445 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
mdkinney 2009-02-06 01:46:55 +00:00
parent 57dd2382b7
commit 3dc728fb14
3 changed files with 516 additions and 27 deletions

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@ -20,60 +20,81 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#ifndef __DEVICE_PATH_LIB_H__
#define __DEVICE_PATH_LIB_H__
#include <Library/BaseLib.h>
#define END_DEVICE_PATH_LENGTH (sizeof (EFI_DEVICE_PATH_PROTOCOL))
/**
Macro that returns the Type field of a device path node.
Returns the Type field of a device path node.
Returns the Type field of the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The Type field of the device path node specified by Node.
**/
#define DevicePathType(Node) (((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type)
UINT8
DevicePathType (
IN CONST VOID *Node
);
/**
Macro that returns the SubType field of a device path node.
Returns the SubType field of a device path node.
Returns the SubType field of the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The SubType field of the device path node specified by Node.
**/
#define DevicePathSubType(Node) (((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType)
UINT8
DevicePathSubType (
IN CONST VOID *Node
);
/**
Macro that returns the 16-bit Length field of a device path node.
Returns the 16-bit Length field of a device path node.
Returns the 16-bit Length field of the device path node specified by Node.
Node is not required to be aligned on a 16-bit boundary, so it is recommended
that a function such as ReadUnaligned16() be used to extract the contents of
the Length field.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The 16-bit Length field of the device path node specified by Node.
**/
#define DevicePathNodeLength(Node) ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0])
UINTN
DevicePathNodeLength (
IN CONST VOID *Node
);
/**
Macro that returns a pointer to the next node in a device path.
Returns a pointer to the next node in a device path.
Returns a pointer to the device path node that follows the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return a pointer to the device path node that follows the device path node specified by Node.
**/
#define NextDevicePathNode(Node) ((EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node)))
EFI_DEVICE_PATH_PROTOCOL *
NextDevicePathNode (
IN CONST VOID *Node
);
/**
Macro that determines if a device path node is an end node of a device path.
Determines if a device path node is an end node of a device path.
This includes nodes that are the end of a device path instance and nodes that are the end of an entire device path.
Determines if the device path node specified by Node is an end node of a device path.
@ -81,46 +102,67 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
end of an entire device path. If Node represents an end node of a device path,
then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is an end node of a device path.
@retval FALSE The device path node specified by Node is not an end node of a device path.
**/
#define IsDevicePathEndType(Node) ((DevicePathType (Node) & 0x7f) == END_DEVICE_PATH_TYPE)
BOOLEAN
IsDevicePathEndType (
IN CONST VOID *Node
);
/**
Macro that determines if a device path node is an end node of an entire device path.
Determines if a device path node is an end node of an entire device path.
Determines if a device path node specified by Node is an end node of an entire device path.
If Node represents the end of an entire device path, then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is the end of an entire device path.
@retval FALSE The device path node specified by Node is not the end of an entire device path.
**/
#define IsDevicePathEnd(Node) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE)
BOOLEAN
IsDevicePathEnd (
IN CONST VOID *Node
);
/**
Macro that determines if a device path node is an end node of a device path instance.
Determines if a device path node is an end node of a device path instance.
Determines if a device path node specified by Node is an end node of a device path instance.
If Node represents the end of a device path instance, then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is the end of a device path instance.
@retval FALSE The device path node specified by Node is not the end of a device path instance.
**/
#define IsDevicePathEndInstance(Node) (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE)
BOOLEAN
IsDevicePathEndInstance (
IN CONST VOID *Node
);
/**
Macro that sets the length, in bytes, of a device path node.
Sets the length, in bytes, of a device path node.
Sets the length of the device path node specified by Node to the value specified by Length. Length is returned.
Sets the length of the device path node specified by Node to the value specified
by NodeLength. NodeLength is returned. Node is not required to be aligned on
a 16-bit boundary, so it is recommended that a function such as WriteUnaligned16()
be used to set the contents of the Length field.
If Node is NULL, then ASSERT().
If NodeLength >= 0x10000, then ASSERT().
@param Node A pointer to a device path node data structure.
@param Length The length, in bytes, of the device path node.
@ -128,21 +170,32 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
@return Length
**/
#define SetDevicePathNodeLength(Node,NodeLength) WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(NodeLength))
UINT16
SetDevicePathNodeLength (
IN VOID *Node,
IN UINTN Length
);
/**
Macro that fills in all the fields of a device path node that is the end of an entire device path.
Fills in all the fields of a device path node that is the end of an entire device path.
Fills in all the fields of a device path node specified by Node so Node represents the end of an entire device path.
Fills in all the fields of a device path node specified by Node so Node represents
the end of an entire device path. The Type field of Node is set to
END_DEVICE_PATH_TYPE, the SubType field of Node is set to
END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to
END_DEVICE_PATH_LENGTH. Node is not required to be aligned on a 16-bit boundary,
so it is recommended that a function such as WriteUnaligned16() be used to set
the contents of the Length field.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
**/
#define SetDevicePathEndNode(Node) { \
DevicePathType (Node) = END_DEVICE_PATH_TYPE; \
DevicePathSubType (Node) = END_ENTIRE_DEVICE_PATH_SUBTYPE; \
SetDevicePathNodeLength ((Node), END_DEVICE_PATH_LENGTH); \
}
VOID
SetDevicePathEndNode (
IN VOID *Node
);
/**
Returns the size of a device path in bytes.

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@ -43,6 +43,218 @@ GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_PROTOCOL mUefiDevicePathLib
}
};
/**
Returns the Type field of a device path node.
Returns the Type field of the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The Type field of the device path node specified by Node.
**/
UINT8
DevicePathType (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type;
}
/**
Returns the SubType field of a device path node.
Returns the SubType field of the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The SubType field of the device path node specified by Node.
**/
UINT8
DevicePathSubType (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType;
}
/**
Returns the 16-bit Length field of a device path node.
Returns the 16-bit Length field of the device path node specified by Node.
Node is not required to be aligned on a 16-bit boundary, so it is recommended
that a function such as ReadUnaligned16() be used to extract the contents of
the Length field.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The 16-bit Length field of the device path node specified by Node.
**/
UINTN
DevicePathNodeLength (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0]);
}
/**
Returns a pointer to the next node in a device path.
Returns a pointer to the device path node that follows the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return a pointer to the device path node that follows the device path node specified by Node.
**/
EFI_DEVICE_PATH_PROTOCOL *
NextDevicePathNode (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node));
}
/**
Determines if a device path node is an end node of a device path.
This includes nodes that are the end of a device path instance and nodes that are the end of an entire device path.
Determines if the device path node specified by Node is an end node of a device path.
This includes nodes that are the end of a device path instance and nodes that are the
end of an entire device path. If Node represents an end node of a device path,
then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is an end node of a device path.
@retval FALSE The device path node specified by Node is not an end node of a device path.
**/
BOOLEAN
IsDevicePathEndType (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ((DevicePathType (Node) & 0x7f) == END_DEVICE_PATH_TYPE);
}
/**
Determines if a device path node is an end node of an entire device path.
Determines if a device path node specified by Node is an end node of an entire device path.
If Node represents the end of an entire device path, then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is the end of an entire device path.
@retval FALSE The device path node specified by Node is not the end of an entire device path.
**/
BOOLEAN
IsDevicePathEnd (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE);
}
/**
Determines if a device path node is an end node of a device path instance.
Determines if a device path node specified by Node is an end node of a device path instance.
If Node represents the end of a device path instance, then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is the end of a device path instance.
@retval FALSE The device path node specified by Node is not the end of a device path instance.
**/
BOOLEAN
IsDevicePathEndInstance (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE);
}
/**
Sets the length, in bytes, of a device path node.
Sets the length of the device path node specified by Node to the value specified
by NodeLength. NodeLength is returned. Node is not required to be aligned on
a 16-bit boundary, so it is recommended that a function such as WriteUnaligned16()
be used to set the contents of the Length field.
If Node is NULL, then ASSERT().
If NodeLength >= 0x10000, then ASSERT().
@param Node A pointer to a device path node data structure.
@param Length The length, in bytes, of the device path node.
@return Length
**/
UINT16
SetDevicePathNodeLength (
IN VOID *Node,
IN UINTN NodeLength
)
{
ASSERT (Node != NULL);
ASSERT (NodeLength < 0x10000);
return WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(NodeLength));
}
/**
Fills in all the fields of a device path node that is the end of an entire device path.
Fills in all the fields of a device path node specified by Node so Node represents
the end of an entire device path. The Type field of Node is set to
END_DEVICE_PATH_TYPE, the SubType field of Node is set to
END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to
END_DEVICE_PATH_LENGTH. Node is not required to be aligned on a 16-bit boundary,
so it is recommended that a function such as WriteUnaligned16() be used to set
the contents of the Length field.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
**/
VOID
SetDevicePathEndNode (
IN VOID *Node
)
{
ASSERT (Node != NULL);
CopyMem (Node, &mUefiDevicePathLibEndDevicePath, sizeof (mUefiDevicePathLibEndDevicePath));
}
/**
Returns the size of a device path in bytes.

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@ -28,6 +28,18 @@
EFI_DEVICE_PATH_UTILITIES_PROTOCOL *mDevicePathUtilities = NULL;
//
// Template for an end-of-device path node.
//
GLOBAL_REMOVE_IF_UNREFERENCED CONST EFI_DEVICE_PATH_PROTOCOL mUefiDevicePathLibEndDevicePath = {
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
{
END_DEVICE_PATH_LENGTH,
0
}
};
/**
The constructor function caches the pointer to DevicePathUtilites protocol.
@ -60,6 +72,218 @@ DevicePathLibConstructor (
return Status;
}
/**
Returns the Type field of a device path node.
Returns the Type field of the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The Type field of the device path node specified by Node.
**/
UINT8
DevicePathType (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Type;
}
/**
Returns the SubType field of a device path node.
Returns the SubType field of the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The SubType field of the device path node specified by Node.
**/
UINT8
DevicePathSubType (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ((EFI_DEVICE_PATH_PROTOCOL *)(Node))->SubType;
}
/**
Returns the 16-bit Length field of a device path node.
Returns the 16-bit Length field of the device path node specified by Node.
Node is not required to be aligned on a 16-bit boundary, so it is recommended
that a function such as ReadUnaligned16() be used to extract the contents of
the Length field.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return The 16-bit Length field of the device path node specified by Node.
**/
UINTN
DevicePathNodeLength (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ReadUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0]);
}
/**
Returns a pointer to the next node in a device path.
Returns a pointer to the device path node that follows the device path node specified by Node.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@return a pointer to the device path node that follows the device path node specified by Node.
**/
EFI_DEVICE_PATH_PROTOCOL *
NextDevicePathNode (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return (EFI_DEVICE_PATH_PROTOCOL *)((UINT8 *)(Node) + DevicePathNodeLength(Node));
}
/**
Determines if a device path node is an end node of a device path.
This includes nodes that are the end of a device path instance and nodes that are the end of an entire device path.
Determines if the device path node specified by Node is an end node of a device path.
This includes nodes that are the end of a device path instance and nodes that are the
end of an entire device path. If Node represents an end node of a device path,
then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is an end node of a device path.
@retval FALSE The device path node specified by Node is not an end node of a device path.
**/
BOOLEAN
IsDevicePathEndType (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return ((DevicePathType (Node) & 0x7f) == END_DEVICE_PATH_TYPE);
}
/**
Determines if a device path node is an end node of an entire device path.
Determines if a device path node specified by Node is an end node of an entire device path.
If Node represents the end of an entire device path, then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is the end of an entire device path.
@retval FALSE The device path node specified by Node is not the end of an entire device path.
**/
BOOLEAN
IsDevicePathEnd (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_ENTIRE_DEVICE_PATH_SUBTYPE);
}
/**
Determines if a device path node is an end node of a device path instance.
Determines if a device path node specified by Node is an end node of a device path instance.
If Node represents the end of a device path instance, then TRUE is returned. Otherwise, FALSE is returned.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
@retval TRUE The device path node specified by Node is the end of a device path instance.
@retval FALSE The device path node specified by Node is not the end of a device path instance.
**/
BOOLEAN
IsDevicePathEndInstance (
IN CONST VOID *Node
)
{
ASSERT (Node != NULL);
return (IsDevicePathEndType (Node) && DevicePathSubType(Node) == END_INSTANCE_DEVICE_PATH_SUBTYPE);
}
/**
Sets the length, in bytes, of a device path node.
Sets the length of the device path node specified by Node to the value specified
by NodeLength. NodeLength is returned. Node is not required to be aligned on
a 16-bit boundary, so it is recommended that a function such as WriteUnaligned16()
be used to set the contents of the Length field.
If Node is NULL, then ASSERT().
If NodeLength >= 0x10000, then ASSERT().
@param Node A pointer to a device path node data structure.
@param Length The length, in bytes, of the device path node.
@return Length
**/
UINT16
SetDevicePathNodeLength (
IN VOID *Node,
IN UINTN NodeLength
)
{
ASSERT (Node != NULL);
ASSERT (NodeLength < 0x10000);
return WriteUnaligned16 ((UINT16 *)&((EFI_DEVICE_PATH_PROTOCOL *)(Node))->Length[0], (UINT16)(NodeLength));
}
/**
Fills in all the fields of a device path node that is the end of an entire device path.
Fills in all the fields of a device path node specified by Node so Node represents
the end of an entire device path. The Type field of Node is set to
END_DEVICE_PATH_TYPE, the SubType field of Node is set to
END_ENTIRE_DEVICE_PATH_SUBTYPE, and the Length field of Node is set to
END_DEVICE_PATH_LENGTH. Node is not required to be aligned on a 16-bit boundary,
so it is recommended that a function such as WriteUnaligned16() be used to set
the contents of the Length field.
If Node is NULL, then ASSERT().
@param Node A pointer to a device path node data structure.
**/
VOID
SetDevicePathEndNode (
IN VOID *Node
)
{
ASSERT (Node != NULL);
CopyMem (Node, &mUefiDevicePathLibEndDevicePath, sizeof (mUefiDevicePathLibEndDevicePath));
}
/**
Returns the size of a device path in bytes.