// base64.cpp - written and placed in the public domain by Wei Dai#include "pch.h"#include "base64.h"NAMESPACE_BEGIN(CryptoPP)static const byte s_vec[] =		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";static const byte s_padding = '=';void Base64Encoder::IsolatedInitialize(const NameValuePairs &parameters){	bool insertLineBreaks = parameters.GetValueWithDefault("InsertLineBreaks", true);	int maxLineLength = parameters.GetIntValueWithDefault("MaxLineLength", 72);	const char *lineBreak = insertLineBreaks ? "\n" : "";		m_filter->Initialize(CombinedNameValuePairs(		parameters,		MakeParameters("EncodingLookupArray", (const byte *)s_vec)			("PaddingByte", s_padding)			("Log2Base", 6)			("GroupSize", insertLineBreaks ? maxLineLength : 0)			("Separator", ConstByteArrayParameter(lineBreak))			("Terminator", ConstByteArrayParameter(lineBreak))));}const int *Base64Decoder::GetDecodingLookupArray(){	static bool s_initialized = false;	static int s_array[256];	if (!s_initialized)	{		InitializeDecodingLookupArray(s_array, s_vec, 64, false);		s_initialized = true;	}	return s_array;}NAMESPACE_END