cryptopp/base32.cpp at master · DevJPM/cryptopp · GitHub

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// base32.cpp - written and placed in the public domain by Frank Palazzolo, based on hex.cpp by Wei Dai

#include"pch.h"
#include"base32.h"

NAMESPACE_BEGIN(CryptoPP)

staticconst byte s_vecUpper[] = "ABCDEFGHIJKMNPQRSTUVWXYZ23456789";
staticconst byte s_vecLower[] = "abcdefghijkmnpqrstuvwxyz23456789";

voidBase32Encoder::IsolatedInitialize(const NameValuePairs &parameters)
{
bool uppercase = parameters.GetValueWithDefault(Name::Uppercase(), true);
	m_filter->Initialize(CombinedNameValuePairs(
 parameters,
MakeParameters(Name::EncodingLookupArray(), uppercase ? &s_vecUpper[0] : &s_vecLower[0], false)(Name::Log2Base(), 5, true)));
}

voidBase32Decoder::IsolatedInitialize(const NameValuePairs &parameters)
{
BaseN_Decoder::Initialize(CombinedNameValuePairs(
 parameters,
MakeParameters(Name::DecodingLookupArray(), GetDefaultDecodingLookupArray(), false)(Name::Log2Base(), 5, true)));
}

constint *Base32Decoder::GetDefaultDecodingLookupArray()
{
staticvolatilebool s_initialized = false;
staticint s_array[256];

if (!s_initialized)
	{
InitializeDecodingLookupArray(s_array, s_vecUpper, 32, true);
 s_initialized = true;
	}
return s_array;
}

NAMESPACE_END