/** @file | |
Utility functions to generate checksum based on 2's complement | |
algorithm. | |
Copyright (c) 2007 - 2018, Intel Corporation. All rights reserved.<BR> | |
Copyright (c) 2022, Pedro Falcato. All rights reserved.<BR> | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#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. | |
**/ | |
UINT8 | |
EFIAPI | |
CalculateSum8 ( | |
IN CONST UINT8 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT8 Sum; | |
UINTN Count; | |
ASSERT (Buffer != NULL); | |
ASSERT (Length <= (MAX_ADDRESS - ((UINTN)Buffer) + 1)); | |
for (Sum = 0, Count = 0; Count < Length; Count++) { | |
Sum = (UINT8)(Sum + *(Buffer + Count)); | |
} | |
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. | |
**/ | |
UINT8 | |
EFIAPI | |
CalculateCheckSum8 ( | |
IN CONST UINT8 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT8 CheckSum; | |
CheckSum = CalculateSum8 (Buffer, Length); | |
// | |
// Return the checksum based on 2's complement. | |
// | |
return (UINT8)(0x100 - CheckSum); | |
} | |
/** | |
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. | |
**/ | |
UINT16 | |
EFIAPI | |
CalculateSum16 ( | |
IN CONST UINT16 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT16 Sum; | |
UINTN Count; | |
UINTN Total; | |
ASSERT (Buffer != NULL); | |
ASSERT (((UINTN)Buffer & 0x1) == 0); | |
ASSERT ((Length & 0x1) == 0); | |
ASSERT (Length <= (MAX_ADDRESS - ((UINTN)Buffer) + 1)); | |
Total = Length / sizeof (*Buffer); | |
for (Sum = 0, Count = 0; Count < Total; Count++) { | |
Sum = (UINT16)(Sum + *(Buffer + Count)); | |
} | |
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. | |
**/ | |
UINT16 | |
EFIAPI | |
CalculateCheckSum16 ( | |
IN CONST UINT16 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT16 CheckSum; | |
CheckSum = CalculateSum16 (Buffer, Length); | |
// | |
// Return the checksum based on 2's complement. | |
// | |
return (UINT16)(0x10000 - CheckSum); | |
} | |
/** | |
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. | |
**/ | |
UINT32 | |
EFIAPI | |
CalculateSum32 ( | |
IN CONST UINT32 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT32 Sum; | |
UINTN Count; | |
UINTN Total; | |
ASSERT (Buffer != NULL); | |
ASSERT (((UINTN)Buffer & 0x3) == 0); | |
ASSERT ((Length & 0x3) == 0); | |
ASSERT (Length <= (MAX_ADDRESS - ((UINTN)Buffer) + 1)); | |
Total = Length / sizeof (*Buffer); | |
for (Sum = 0, Count = 0; Count < Total; Count++) { | |
Sum = Sum + *(Buffer + Count); | |
} | |
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. | |
**/ | |
UINT32 | |
EFIAPI | |
CalculateCheckSum32 ( | |
IN CONST UINT32 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT32 CheckSum; | |
CheckSum = CalculateSum32 (Buffer, Length); | |
// | |
// Return the checksum based on 2's complement. | |
// | |
return (UINT32)((UINT32)(-1) - CheckSum + 1); | |
} | |
/** | |
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. | |
**/ | |
UINT64 | |
EFIAPI | |
CalculateSum64 ( | |
IN CONST UINT64 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT64 Sum; | |
UINTN Count; | |
UINTN Total; | |
ASSERT (Buffer != NULL); | |
ASSERT (((UINTN)Buffer & 0x7) == 0); | |
ASSERT ((Length & 0x7) == 0); | |
ASSERT (Length <= (MAX_ADDRESS - ((UINTN)Buffer) + 1)); | |
Total = Length / sizeof (*Buffer); | |
for (Sum = 0, Count = 0; Count < Total; Count++) { | |
Sum = Sum + *(Buffer + Count); | |
} | |
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. | |
**/ | |
UINT64 | |
EFIAPI | |
CalculateCheckSum64 ( | |
IN CONST UINT64 *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINT64 CheckSum; | |
CheckSum = CalculateSum64 (Buffer, Length); | |
// | |
// Return the checksum based on 2's complement. | |
// | |
return (UINT64)((UINT64)(-1) - CheckSum + 1); | |
} | |
GLOBAL_REMOVE_IF_UNREFERENCED CONST UINT32 mCrcTable[256] = { | |
0x00000000, | |
0x77073096, | |
0xEE0E612C, | |
0x990951BA, | |
0x076DC419, | |
0x706AF48F, | |
0xE963A535, | |
0x9E6495A3, | |
0x0EDB8832, | |
0x79DCB8A4, | |
0xE0D5E91E, | |
0x97D2D988, | |
0x09B64C2B, | |
0x7EB17CBD, | |
0xE7B82D07, | |
0x90BF1D91, | |
0x1DB71064, | |
0x6AB020F2, | |
0xF3B97148, | |
0x84BE41DE, | |
0x1ADAD47D, | |
0x6DDDE4EB, | |
0xF4D4B551, | |
0x83D385C7, | |
0x136C9856, | |
0x646BA8C0, | |
0xFD62F97A, | |
0x8A65C9EC, | |
0x14015C4F, | |
0x63066CD9, | |
0xFA0F3D63, | |
0x8D080DF5, | |
0x3B6E20C8, | |
0x4C69105E, | |
0xD56041E4, | |
0xA2677172, | |
0x3C03E4D1, | |
0x4B04D447, | |
0xD20D85FD, | |
0xA50AB56B, | |
0x35B5A8FA, | |
0x42B2986C, | |
0xDBBBC9D6, | |
0xACBCF940, | |
0x32D86CE3, | |
0x45DF5C75, | |
0xDCD60DCF, | |
0xABD13D59, | |
0x26D930AC, | |
0x51DE003A, | |
0xC8D75180, | |
0xBFD06116, | |
0x21B4F4B5, | |
0x56B3C423, | |
0xCFBA9599, | |
0xB8BDA50F, | |
0x2802B89E, | |
0x5F058808, | |
0xC60CD9B2, | |
0xB10BE924, | |
0x2F6F7C87, | |
0x58684C11, | |
0xC1611DAB, | |
0xB6662D3D, | |
0x76DC4190, | |
0x01DB7106, | |
0x98D220BC, | |
0xEFD5102A, | |
0x71B18589, | |
0x06B6B51F, | |
0x9FBFE4A5, | |
0xE8B8D433, | |
0x7807C9A2, | |
0x0F00F934, | |
0x9609A88E, | |
0xE10E9818, | |
0x7F6A0DBB, | |
0x086D3D2D, | |
0x91646C97, | |
0xE6635C01, | |
0x6B6B51F4, | |
0x1C6C6162, | |
0x856530D8, | |
0xF262004E, | |
0x6C0695ED, | |
0x1B01A57B, | |
0x8208F4C1, | |
0xF50FC457, | |
0x65B0D9C6, | |
0x12B7E950, | |
0x8BBEB8EA, | |
0xFCB9887C, | |
0x62DD1DDF, | |
0x15DA2D49, | |
0x8CD37CF3, | |
0xFBD44C65, | |
0x4DB26158, | |
0x3AB551CE, | |
0xA3BC0074, | |
0xD4BB30E2, | |
0x4ADFA541, | |
0x3DD895D7, | |
0xA4D1C46D, | |
0xD3D6F4FB, | |
0x4369E96A, | |
0x346ED9FC, | |
0xAD678846, | |
0xDA60B8D0, | |
0x44042D73, | |
0x33031DE5, | |
0xAA0A4C5F, | |
0xDD0D7CC9, | |
0x5005713C, | |
0x270241AA, | |
0xBE0B1010, | |
0xC90C2086, | |
0x5768B525, | |
0x206F85B3, | |
0xB966D409, | |
0xCE61E49F, | |
0x5EDEF90E, | |
0x29D9C998, | |
0xB0D09822, | |
0xC7D7A8B4, | |
0x59B33D17, | |
0x2EB40D81, | |
0xB7BD5C3B, | |
0xC0BA6CAD, | |
0xEDB88320, | |
0x9ABFB3B6, | |
0x03B6E20C, | |
0x74B1D29A, | |
0xEAD54739, | |
0x9DD277AF, | |
0x04DB2615, | |
0x73DC1683, | |
0xE3630B12, | |
0x94643B84, | |
0x0D6D6A3E, | |
0x7A6A5AA8, | |
0xE40ECF0B, | |
0x9309FF9D, | |
0x0A00AE27, | |
0x7D079EB1, | |
0xF00F9344, | |
0x8708A3D2, | |
0x1E01F268, | |
0x6906C2FE, | |
0xF762575D, | |
0x806567CB, | |
0x196C3671, | |
0x6E6B06E7, | |
0xFED41B76, | |
0x89D32BE0, | |
0x10DA7A5A, | |
0x67DD4ACC, | |
0xF9B9DF6F, | |
0x8EBEEFF9, | |
0x17B7BE43, | |
0x60B08ED5, | |
0xD6D6A3E8, | |
0xA1D1937E, | |
0x38D8C2C4, | |
0x4FDFF252, | |
0xD1BB67F1, | |
0xA6BC5767, | |
0x3FB506DD, | |
0x48B2364B, | |
0xD80D2BDA, | |
0xAF0A1B4C, | |
0x36034AF6, | |
0x41047A60, | |
0xDF60EFC3, | |
0xA867DF55, | |
0x316E8EEF, | |
0x4669BE79, | |
0xCB61B38C, | |
0xBC66831A, | |
0x256FD2A0, | |
0x5268E236, | |
0xCC0C7795, | |
0xBB0B4703, | |
0x220216B9, | |
0x5505262F, | |
0xC5BA3BBE, | |
0xB2BD0B28, | |
0x2BB45A92, | |
0x5CB36A04, | |
0xC2D7FFA7, | |
0xB5D0CF31, | |
0x2CD99E8B, | |
0x5BDEAE1D, | |
0x9B64C2B0, | |
0xEC63F226, | |
0x756AA39C, | |
0x026D930A, | |
0x9C0906A9, | |
0xEB0E363F, | |
0x72076785, | |
0x05005713, | |
0x95BF4A82, | |
0xE2B87A14, | |
0x7BB12BAE, | |
0x0CB61B38, | |
0x92D28E9B, | |
0xE5D5BE0D, | |
0x7CDCEFB7, | |
0x0BDBDF21, | |
0x86D3D2D4, | |
0xF1D4E242, | |
0x68DDB3F8, | |
0x1FDA836E, | |
0x81BE16CD, | |
0xF6B9265B, | |
0x6FB077E1, | |
0x18B74777, | |
0x88085AE6, | |
0xFF0F6A70, | |
0x66063BCA, | |
0x11010B5C, | |
0x8F659EFF, | |
0xF862AE69, | |
0x616BFFD3, | |
0x166CCF45, | |
0xA00AE278, | |
0xD70DD2EE, | |
0x4E048354, | |
0x3903B3C2, | |
0xA7672661, | |
0xD06016F7, | |
0x4969474D, | |
0x3E6E77DB, | |
0xAED16A4A, | |
0xD9D65ADC, | |
0x40DF0B66, | |
0x37D83BF0, | |
0xA9BCAE53, | |
0xDEBB9EC5, | |
0x47B2CF7F, | |
0x30B5FFE9, | |
0xBDBDF21C, | |
0xCABAC28A, | |
0x53B39330, | |
0x24B4A3A6, | |
0xBAD03605, | |
0xCDD70693, | |
0x54DE5729, | |
0x23D967BF, | |
0xB3667A2E, | |
0xC4614AB8, | |
0x5D681B02, | |
0x2A6F2B94, | |
0xB40BBE37, | |
0xC30C8EA1, | |
0x5A05DF1B, | |
0x2D02EF8D | |
}; | |
/** | |
Computes and returns a 32-bit CRC for a data buffer. | |
CRC32 value bases on ITU-T V.42. | |
If Buffer is NULL, then ASSERT(). | |
If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). | |
@param[in] Buffer A pointer to the buffer on which the 32-bit CRC is to be computed. | |
@param[in] Length The number of bytes in the buffer Data. | |
@retval Crc32 The 32-bit CRC was computed for the data buffer. | |
**/ | |
UINT32 | |
EFIAPI | |
CalculateCrc32 ( | |
IN VOID *Buffer, | |
IN UINTN Length | |
) | |
{ | |
UINTN Index; | |
UINT32 Crc; | |
UINT8 *Ptr; | |
ASSERT (Buffer != NULL); | |
ASSERT (Length <= (MAX_ADDRESS - ((UINTN)Buffer) + 1)); | |
// | |
// Compute CRC | |
// | |
Crc = 0xffffffff; | |
for (Index = 0, Ptr = Buffer; Index < Length; Index++, Ptr++) { | |
Crc = (Crc >> 8) ^ mCrcTable[(UINT8)Crc ^ *Ptr]; | |
} | |
return Crc ^ 0xffffffff; | |
} | |
GLOBAL_REMOVE_IF_UNREFERENCED STATIC CONST UINT16 mCrc16LookupTable[256] = | |
{ | |
0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241, | |
0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440, | |
0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40, | |
0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841, | |
0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40, | |
0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41, | |
0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641, | |
0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040, | |
0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240, | |
0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441, | |
0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41, | |
0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840, | |
0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41, | |
0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40, | |
0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640, | |
0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041, | |
0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240, | |
0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441, | |
0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41, | |
0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840, | |
0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41, | |
0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40, | |
0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640, | |
0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041, | |
0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241, | |
0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440, | |
0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40, | |
0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841, | |
0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40, | |
0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41, | |
0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641, | |
0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040 | |
}; | |
/** | |
Calculates the CRC16-ANSI checksum of the given buffer. | |
@param[in] Buffer Pointer to the buffer. | |
@param[in] Length Length of the buffer, in bytes. | |
@param[in] InitialValue Initial value of the CRC. | |
@return The CRC16-ANSI checksum. | |
**/ | |
UINT16 | |
EFIAPI | |
CalculateCrc16Ansi ( | |
IN CONST VOID *Buffer, | |
IN UINTN Length, | |
IN UINT16 InitialValue | |
) | |
{ | |
CONST UINT8 *Buf; | |
UINT16 Crc; | |
Buf = Buffer; | |
Crc = ~InitialValue; | |
while (Length-- != 0) { | |
Crc = mCrc16LookupTable[(Crc & 0xFF) ^ *(Buf++)] ^ (Crc >> 8); | |
} | |
return ~Crc; | |
} | |
GLOBAL_REMOVE_IF_UNREFERENCED STATIC CONST UINT32 mCrc32cLookupTable[256] = { | |
0x00000000, 0xf26b8303, 0xe13b70f7, 0x1350f3f4, 0xc79a971f, 0x35f1141c, | |
0x26a1e7e8, 0xd4ca64eb, 0x8ad958cf, 0x78b2dbcc, 0x6be22838, 0x9989ab3b, | |
0x4d43cfd0, 0xbf284cd3, 0xac78bf27, 0x5e133c24, 0x105ec76f, 0xe235446c, | |
0xf165b798, 0x030e349b, 0xd7c45070, 0x25afd373, 0x36ff2087, 0xc494a384, | |
0x9a879fa0, 0x68ec1ca3, 0x7bbcef57, 0x89d76c54, 0x5d1d08bf, 0xaf768bbc, | |
0xbc267848, 0x4e4dfb4b, 0x20bd8ede, 0xd2d60ddd, 0xc186fe29, 0x33ed7d2a, | |
0xe72719c1, 0x154c9ac2, 0x061c6936, 0xf477ea35, 0xaa64d611, 0x580f5512, | |
0x4b5fa6e6, 0xb93425e5, 0x6dfe410e, 0x9f95c20d, 0x8cc531f9, 0x7eaeb2fa, | |
0x30e349b1, 0xc288cab2, 0xd1d83946, 0x23b3ba45, 0xf779deae, 0x05125dad, | |
0x1642ae59, 0xe4292d5a, 0xba3a117e, 0x4851927d, 0x5b016189, 0xa96ae28a, | |
0x7da08661, 0x8fcb0562, 0x9c9bf696, 0x6ef07595, 0x417b1dbc, 0xb3109ebf, | |
0xa0406d4b, 0x522bee48, 0x86e18aa3, 0x748a09a0, 0x67dafa54, 0x95b17957, | |
0xcba24573, 0x39c9c670, 0x2a993584, 0xd8f2b687, 0x0c38d26c, 0xfe53516f, | |
0xed03a29b, 0x1f682198, 0x5125dad3, 0xa34e59d0, 0xb01eaa24, 0x42752927, | |
0x96bf4dcc, 0x64d4cecf, 0x77843d3b, 0x85efbe38, 0xdbfc821c, 0x2997011f, | |
0x3ac7f2eb, 0xc8ac71e8, 0x1c661503, 0xee0d9600, 0xfd5d65f4, 0x0f36e6f7, | |
0x61c69362, 0x93ad1061, 0x80fde395, 0x72966096, 0xa65c047d, 0x5437877e, | |
0x4767748a, 0xb50cf789, 0xeb1fcbad, 0x197448ae, 0x0a24bb5a, 0xf84f3859, | |
0x2c855cb2, 0xdeeedfb1, 0xcdbe2c45, 0x3fd5af46, 0x7198540d, 0x83f3d70e, | |
0x90a324fa, 0x62c8a7f9, 0xb602c312, 0x44694011, 0x5739b3e5, 0xa55230e6, | |
0xfb410cc2, 0x092a8fc1, 0x1a7a7c35, 0xe811ff36, 0x3cdb9bdd, 0xceb018de, | |
0xdde0eb2a, 0x2f8b6829, 0x82f63b78, 0x709db87b, 0x63cd4b8f, 0x91a6c88c, | |
0x456cac67, 0xb7072f64, 0xa457dc90, 0x563c5f93, 0x082f63b7, 0xfa44e0b4, | |
0xe9141340, 0x1b7f9043, 0xcfb5f4a8, 0x3dde77ab, 0x2e8e845f, 0xdce5075c, | |
0x92a8fc17, 0x60c37f14, 0x73938ce0, 0x81f80fe3, 0x55326b08, 0xa759e80b, | |
0xb4091bff, 0x466298fc, 0x1871a4d8, 0xea1a27db, 0xf94ad42f, 0x0b21572c, | |
0xdfeb33c7, 0x2d80b0c4, 0x3ed04330, 0xccbbc033, 0xa24bb5a6, 0x502036a5, | |
0x4370c551, 0xb11b4652, 0x65d122b9, 0x97baa1ba, 0x84ea524e, 0x7681d14d, | |
0x2892ed69, 0xdaf96e6a, 0xc9a99d9e, 0x3bc21e9d, 0xef087a76, 0x1d63f975, | |
0x0e330a81, 0xfc588982, 0xb21572c9, 0x407ef1ca, 0x532e023e, 0xa145813d, | |
0x758fe5d6, 0x87e466d5, 0x94b49521, 0x66df1622, 0x38cc2a06, 0xcaa7a905, | |
0xd9f75af1, 0x2b9cd9f2, 0xff56bd19, 0x0d3d3e1a, 0x1e6dcdee, 0xec064eed, | |
0xc38d26c4, 0x31e6a5c7, 0x22b65633, 0xd0ddd530, 0x0417b1db, 0xf67c32d8, | |
0xe52cc12c, 0x1747422f, 0x49547e0b, 0xbb3ffd08, 0xa86f0efc, 0x5a048dff, | |
0x8ecee914, 0x7ca56a17, 0x6ff599e3, 0x9d9e1ae0, 0xd3d3e1ab, 0x21b862a8, | |
0x32e8915c, 0xc083125f, 0x144976b4, 0xe622f5b7, 0xf5720643, 0x07198540, | |
0x590ab964, 0xab613a67, 0xb831c993, 0x4a5a4a90, 0x9e902e7b, 0x6cfbad78, | |
0x7fab5e8c, 0x8dc0dd8f, 0xe330a81a, 0x115b2b19, 0x020bd8ed, 0xf0605bee, | |
0x24aa3f05, 0xd6c1bc06, 0xc5914ff2, 0x37faccf1, 0x69e9f0d5, 0x9b8273d6, | |
0x88d28022, 0x7ab90321, 0xae7367ca, 0x5c18e4c9, 0x4f48173d, 0xbd23943e, | |
0xf36e6f75, 0x0105ec76, 0x12551f82, 0xe03e9c81, 0x34f4f86a, 0xc69f7b69, | |
0xd5cf889d, 0x27a40b9e, 0x79b737ba, 0x8bdcb4b9, 0x988c474d, 0x6ae7c44e, | |
0xbe2da0a5, 0x4c4623a6, 0x5f16d052, 0xad7d5351 | |
}; | |
/** | |
Calculates the CRC32c checksum of the given buffer. | |
@param[in] Buffer Pointer to the buffer. | |
@param[in] Length Length of the buffer, in bytes. | |
@param[in] InitialValue Initial value of the CRC. | |
@return The CRC32c checksum. | |
**/ | |
UINT32 | |
EFIAPI | |
CalculateCrc32c ( | |
IN CONST VOID *Buffer, | |
IN UINTN Length, | |
IN UINT32 InitialValue | |
) | |
{ | |
CONST UINT8 *Buf; | |
UINT32 Crc; | |
Buf = Buffer; | |
Crc = ~InitialValue; | |
while (Length-- != 0) { | |
Crc = mCrc32cLookupTable[(Crc & 0xFF) ^ *(Buf++)] ^ (Crc >> 8); | |
} | |
return ~Crc; | |
} |