text: // 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)
  
  namespace
  {
  	const byte s_vecUpper[] = "ABCDEFGHIJKMNPQRSTUVWXYZ23456789";
  	const byte s_vecLower[] = "abcdefghijkmnpqrstuvwxyz23456789";
  }
  
  void Base32Encoder::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)));
  }
  
  void Base32Decoder::IsolatedInitialize(const NameValuePairs &parameters)
  {
  	BaseN_Decoder::IsolatedInitialize(CombinedNameValuePairs(
  		parameters,
  		MakeParameters(Name::DecodingLookupArray(), GetDefaultDecodingLookupArray(), false)(Name::Log2Base(), 5, true)));
  }
  
  const int *Base32Decoder::GetDefaultDecodingLookupArray()
  {
  	static volatile bool s_initialized = false;
  	static int s_array[256];
  
  	if (!s_initialized)
  	{
  		InitializeDecodingLookupArray(s_array, s_vecUpper, 32, true);
  		s_initialized = true;
  	}
  	return s_array;
  }
  
  NAMESPACE_END
  