1// base64.cpp - written and placed in the public domain by Wei Dai
2
3#include "pch.h"
4#include "base64.h"
5
6NAMESPACE_BEGIN(CryptoPP)
7
8static const byte s_vec[] =
9		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
10static const byte s_padding = '=';
11
12void Base64Encoder::IsolatedInitialize(const NameValuePairs &parameters)
13{
14	bool insertLineBreaks = parameters.GetValueWithDefault(Name::InsertLineBreaks(), true);
15	int maxLineLength = parameters.GetIntValueWithDefault(Name::MaxLineLength(), 72);
16
17	const char *lineBreak = insertLineBreaks ? "\n" : "";
18
19	m_filter->Initialize(CombinedNameValuePairs(
20		parameters,
21		MakeParameters(Name::EncodingLookupArray(), &s_vec[0], false)
22			(Name::PaddingByte(), s_padding)
23			(Name::GroupSize(), insertLineBreaks ? maxLineLength : 0)
24			(Name::Separator(), ConstByteArrayParameter(lineBreak))
25			(Name::Terminator(), ConstByteArrayParameter(lineBreak))
26			(Name::Log2Base(), 6, true)));
27}
28
29const int *Base64Decoder::GetDecodingLookupArray()
30{
31	static bool s_initialized = false;
32	static int s_array[256];
33
34	if (!s_initialized)
35	{
36		InitializeDecodingLookupArray(s_array, s_vec, 64, false);
37		s_initialized = true;
38	}
39	return s_array;
40}
41
42NAMESPACE_END
43