/** @file
Utility functions to generate checksum based on 2's complement
algorithm.
Copyright (c) 2007 - 2010, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#include "BaseLibInternals.h"
/**
Returns the sum of all elements in a buffer in unit of UINT8.
During calculation, the carry bits are dropped.
This function calculates the sum of all elements in a buffer
in unit of UINT8. The carry bits in result of addition are dropped.
The result is returned as UINT8. If Length is Zero, then Zero is
returned.
If Buffer is NULL, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the sum operation.
@param Length The size, in bytes, of Buffer.
@return Sum The sum of Buffer with carry bits dropped during additions.
**/
)
{
}
return Sum;
}
/**
Returns the two's complement checksum of all elements in a buffer
of 8-bit values.
This function first calculates the sum of the 8-bit values in the
buffer specified by Buffer and Length. The carry bits in the result
of addition are dropped. Then, the two's complement of the sum is
returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the checksum operation.
@param Length The size, in bytes, of Buffer.
@return Checksum The 2's complement checksum of Buffer.
**/
)
{
//
// Return the checksum based on 2's complement.
//
}
/**
Returns the sum of all elements in a buffer of 16-bit values. During
calculation, the carry bits are dropped.
This function calculates the sum of the 16-bit values in the buffer
specified by Buffer and Length. The carry bits in result of addition are dropped.
The 16-bit result is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 16-bit boundary, then ASSERT().
If Length is not aligned on a 16-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the sum operation.
@param Length The size, in bytes, of Buffer.
@return Sum The sum of Buffer with carry bits dropped during additions.
**/
)
{
}
return Sum;
}
/**
Returns the two's complement checksum of all elements in a buffer of
16-bit values.
This function first calculates the sum of the 16-bit values in the buffer
specified by Buffer and Length. The carry bits in the result of addition
are dropped. Then, the two's complement of the sum is returned. If Length
is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 16-bit boundary, then ASSERT().
If Length is not aligned on a 16-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the checksum operation.
@param Length The size, in bytes, of Buffer.
@return Checksum The 2's complement checksum of Buffer.
**/
)
{
//
// Return the checksum based on 2's complement.
//
}
/**
Returns the sum of all elements in a buffer of 32-bit values. During
calculation, the carry bits are dropped.
This function calculates the sum of the 32-bit values in the buffer
specified by Buffer and Length. The carry bits in result of addition are dropped.
The 32-bit result is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
If Length is not aligned on a 32-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the sum operation.
@param Length The size, in bytes, of Buffer.
@return Sum The sum of Buffer with carry bits dropped during additions.
**/
)
{
}
return Sum;
}
/**
Returns the two's complement checksum of all elements in a buffer of
32-bit values.
This function first calculates the sum of the 32-bit values in the buffer
specified by Buffer and Length. The carry bits in the result of addition
are dropped. Then, the two's complement of the sum is returned. If Length
is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 32-bit boundary, then ASSERT().
If Length is not aligned on a 32-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the checksum operation.
@param Length The size, in bytes, of Buffer.
@return Checksum The 2's complement checksum of Buffer.
**/
)
{
//
// Return the checksum based on 2's complement.
//
}
/**
Returns the sum of all elements in a buffer of 64-bit values. During
calculation, the carry bits are dropped.
This function calculates the sum of the 64-bit values in the buffer
specified by Buffer and Length. The carry bits in result of addition are dropped.
The 64-bit result is returned. If Length is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
If Length is not aligned on a 64-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the sum operation.
@param Length The size, in bytes, of Buffer.
@return Sum The sum of Buffer with carry bits dropped during additions.
**/
)
{
}
return Sum;
}
/**
Returns the two's complement checksum of all elements in a buffer of
64-bit values.
This function first calculates the sum of the 64-bit values in the buffer
specified by Buffer and Length. The carry bits in the result of addition
are dropped. Then, the two's complement of the sum is returned. If Length
is 0, then 0 is returned.
If Buffer is NULL, then ASSERT().
If Buffer is not aligned on a 64-bit boundary, then ASSERT().
If Length is not aligned on a 64-bit boundary, then ASSERT().
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
@param Buffer The pointer to the buffer to carry out the checksum operation.
@param Length The size, in bytes, of Buffer.
@return Checksum The 2's complement checksum of Buffer.
**/
)
{
//
// Return the checksum based on 2's complement.
//
}