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hex.cpp

00001 // hex.cpp - written and placed in the public domain by Wei Dai
00002 
00003 #include "pch.h"
00004 #include "hex.h"
00005 
00006 NAMESPACE_BEGIN(CryptoPP)
00007 
00008 static const byte s_vecUpper[] = "0123456789ABCDEF";
00009 static const byte s_vecLower[] = "0123456789abcdef";
00010 
00011 void HexEncoder::IsolatedInitialize(const NameValuePairs &parameters)
00012 {
00013         bool uppercase = parameters.GetValueWithDefault("Uppercase", true);
00014         m_filter->Initialize(CombinedNameValuePairs(
00015                 parameters,
00016                 MakeParameters("EncodingLookupArray", uppercase ? &s_vecUpper[0] : &s_vecLower[0])("Log2Base", 4)));
00017 }
00018 
00019 const int *HexDecoder::GetDecodingLookupArray()
00020 {
00021         static bool s_initialized = false;
00022         static int s_array[256];
00023 
00024         if (!s_initialized)
00025         {
00026                 InitializeDecodingLookupArray(s_array, s_vecUpper, 16, true);
00027                 s_initialized = true;
00028         }
00029         return s_array;
00030 }
00031 
00032 NAMESPACE_END

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