mirror of
https://github.com/CloverHackyColor/CloverBootloader.git
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147 lines
3.7 KiB
C
147 lines
3.7 KiB
C
/**
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Copyright (C) 2019, Download-Fritz. All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#ifndef BIG_NUM_LIB_INTERNAL_H
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#define BIG_NUM_LIB_INTERNAL_H
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#include "BigNumLib.h"
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/**
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Calculates the product of A and B.
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@param[out] Hi Buffer in which the high Word of the result is returned.
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@param[in] A The multiplicant.
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@param[in] B The multiplier.
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@returns The low Word of the result.
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**/
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OC_BN_WORD
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BigNumWordMul64 (
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OUT OC_BN_WORD *Hi,
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IN OC_BN_WORD A,
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IN OC_BN_WORD B
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);
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/**
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Calculates the product of A and B.
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@param[out] Hi Buffer in which the high Word of the result is returned.
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@param[in] A The multiplicant.
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@param[in] B The multiplier.
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@returns The low Word of the result.
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**/
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OC_BN_WORD
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BigNumWordMul (
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OUT OC_BN_WORD *Hi,
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IN OC_BN_WORD A,
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IN OC_BN_WORD B
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);
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/**
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Calulates the difference of A and B.
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A must have the same precision as B. Result must have a precision at most as
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bit as A and B.
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@param[in,out] Result The buffer to return the result into.
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@param[in] NumWords The number of Words of Result, minimum number of
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Words of A and B.
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@param[in] A The minuend.
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@param[in] B The subtrahend.
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**/
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VOID
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BigNumSub (
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IN OUT OC_BN_WORD *Result,
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IN OC_BN_NUM_WORDS NumWords,
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IN CONST OC_BN_WORD *A,
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IN CONST OC_BN_WORD *B
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);
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/**
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Calculates the binary union of A and (Value << Exponent).
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@param[in,out] A The number to OR with and store the result into.
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@param[in] NumWords The number of Words of A.
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@param[in] Value The Word value to OR with.
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@param[in] Exponent The Word shift exponent.
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**/
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VOID
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BigNumOrWord (
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IN OUT OC_BN_WORD *A,
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IN OC_BN_NUM_WORDS NumWords,
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IN OC_BN_WORD Value,
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IN UINTN Exponent
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);
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/**
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Calculates the remainder of A and B.
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@param[in,out] Result The buffer to return the result into.
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@param[in] NumWordsRest The number of Words of Result and B.
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@param[in] A The dividend.
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@param[in] NumWordsA The number of Words of A.
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@param[in] B The divisor.
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@returns Whether the operation was completes successfully.
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**/
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BOOLEAN
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BigNumMod (
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IN OUT OC_BN_WORD *Result,
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IN OC_BN_NUM_WORDS NumWordsRest,
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IN CONST OC_BN_WORD *A,
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IN OC_BN_NUM_WORDS NumWordsA,
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IN CONST OC_BN_WORD *B
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);
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/**
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Returns the relative order of A and B. A and B must have the same precision.
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@param[in] A The first number to compare.
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@param[in] NumWords The number of Words to compare.
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@param[in] B The second number to compare.
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@retval < 0 A is lower than B.
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@retval 0 A is as big as B.
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@retval > 0 A is greater than B.
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**/
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INTN
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BigNumCmp (
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IN CONST OC_BN_WORD *A,
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IN OC_BN_NUM_WORDS NumWords,
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IN CONST OC_BN_WORD *B
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);
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/**
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Returns the number of significant bits in a number.
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Logically matches OpenSSL's BN_num_bits.
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@param[in] A The number to gather the number of significant bits of.
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@param[in] NumWords The number of Words of A.
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@returns The number of significant bits in A.
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**/
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OC_BN_NUM_BITS
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BigNumSignificantBits (
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IN CONST OC_BN_WORD *A,
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IN OC_BN_NUM_WORDS NumWords
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);
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#endif // BIG_NUM_LIB_INTERNAL_H
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