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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 
00005 #ifndef CRYPTOPP_IMPORTS
00006 
00007 #include "hex.h"
00008 
00009 NAMESPACE_BEGIN(CryptoPP)
00010 
00011 static const byte s_vecUpper[] = "0123456789ABCDEF";
00012 static const byte s_vecLower[] = "0123456789abcdef";
00013 
00014 void HexEncoder::IsolatedInitialize(const NameValuePairs &parameters)
00015 {
00016         bool uppercase = parameters.GetValueWithDefault("Uppercase", true);
00017         m_filter->Initialize(CombinedNameValuePairs(
00018                 parameters,
00019                 MakeParameters("EncodingLookupArray", uppercase ? &s_vecUpper[0] : &s_vecLower[0])("Log2Base", 4)));
00020 }
00021 
00022 const int *HexDecoder::GetDecodingLookupArray()
00023 {
00024         static bool s_initialized = false;
00025         static int s_array[256];
00026 
00027         if (!s_initialized)
00028         {
00029                 InitializeDecodingLookupArray(s_array, s_vecUpper, 16, true);
00030                 s_initialized = true;
00031         }
00032         return s_array;
00033 }
00034 
00035 NAMESPACE_END
00036 
00037 #endif

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