1// base32.cpp - written and placed in the public domain by Frank Palazzolo, based on hex.cpp by Wei Dai
2
3#include "pch.h"
4#include "base32.h"
5
6NAMESPACE_BEGIN(CryptoPP)
7
8static const byte s_vecUpper[] = "ABCDEFGHIJKMNPQRSTUVWXYZ23456789";
9static const byte s_vecLower[] = "abcdefghijkmnpqrstuvwxyz23456789";
10
11void Base32Encoder::IsolatedInitialize(const NameValuePairs &parameters)
12{
13	bool uppercase = parameters.GetValueWithDefault(Name::Uppercase(), true);
14	m_filter->Initialize(CombinedNameValuePairs(
15		parameters,
16		MakeParameters(Name::EncodingLookupArray(), uppercase ? &s_vecUpper[0] : &s_vecLower[0], false)(Name::Log2Base(), 5, true)));
17}
18
19void Base32Decoder::IsolatedInitialize(const NameValuePairs &parameters)
20{
21	BaseN_Decoder::Initialize(CombinedNameValuePairs(
22		parameters,
23		MakeParameters(Name::DecodingLookupArray(), GetDefaultDecodingLookupArray(), false)(Name::Log2Base(), 5, true)));
24}
25
26const int *Base32Decoder::GetDefaultDecodingLookupArray()
27{
28	static bool s_initialized = false;
29	static int s_array[256];
30
31	if (!s_initialized)
32	{
33		InitializeDecodingLookupArray(s_array, s_vecUpper, 32, true);
34		s_initialized = true;
35	}
36	return s_array;
37}
38
39NAMESPACE_END
40