BigIntegerParser.h

// Copyright (C)2023 Smiling Cat Entertainment, LTD. All Rights Reserved.
 
#pragma once
#include "Inline.h"
#include "BigInteger.h"
 
namespace Duke::BigNumbers
{
    struct FBigIntegerParser
    {
    public:
        static FBigInteger ParseInvariantDecimal(const FString& string);
 
        static FBigInteger ParseInvariantHexadecimal(const FString& string);
 
        static bool TryParseInvariantDecimal(const FString& string, FBigInteger& result);
 
        static bool TryParseInvariantDecimal(const TCHAR*& buffer, const TCHAR* bufferEnd, FBigInteger& result);
 
        static bool TryParseInvariantHexadecimal(const FString& string, FBigInteger& result);
 
        static bool TryParseInvariantHexadecimal(const TCHAR*& buffer, const TCHAR* bufferEnd, FBigInteger& result);
    private:
        static bool ParseSign(const TCHAR*& buffer);
        static bool TryParseDecimalDigit(const TCHAR*& buffer, uint64& digit);
        static bool TryParseHexadecimalDigit(const TCHAR*& buffer, uint32& digit);
        static bool ParseRepeatStart(const TCHAR*& buffer);
        static bool ParseRepeatEnd(const TCHAR*& buffer);
        static bool TryParseRepeatParameters(const TCHAR*& buffer, const TCHAR* bufferEnd, int32& repeatCount, TCHAR& operation, uint64& operand);
        static bool TryParseRepeatOperation(const TCHAR*& buffer, TCHAR& operation);
        static bool TryParseRepeatOperand(const TCHAR*& buffer, const TCHAR* bufferEnd, uint64& operand);
        static void ShiftResultAndAdd(uint64 valueToAdd, int32 powerToShift, FBigInteger& workingResult);
        static void MultiplyResultAndAdd(uint64 valueToAdd, uint64 valueToMultiply, FBigInteger& workingResult);
        static uint64 ApplyOperation(TCHAR operation, uint64 operand, int32 decDigitWithinCount, uint64 pow10Result, uint64 nonadecaDigit);
    };
 
// If conditional inlining is ON, include inlinable functions here.
#if DBN_INLINE_ENABLED
#include "BigIntegerParser.inl"
#endif
 
}