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base64.cpp

00001 // base64.cpp - written and placed in the public domain by Wei Dai
00002 
00003 #include "pch.h"
00004 #include "base64.h"
00005 
00006 NAMESPACE_BEGIN(CryptoPP)
00007 
00008 static const byte s_vec[] =
00009                 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
00010 static const byte s_padding = '=';
00011 
00012 void Base64Encoder::IsolatedInitialize(const NameValuePairs &parameters)
00013 {
00014         bool insertLineBreaks = parameters.GetValueWithDefault("InsertLineBreaks", true);
00015         int maxLineLength = parameters.GetIntValueWithDefault("MaxLineLength", 72);
00016 
00017         const char *lineBreak = insertLineBreaks ? "\n" : "";
00018         
00019         m_filter->Initialize(CombinedNameValuePairs(
00020                 parameters,
00021                 MakeParameters("EncodingLookupArray", (const byte *)s_vec)
00022                         ("PaddingByte", s_padding)
00023                         ("Log2Base", 6)
00024                         ("GroupSize", insertLineBreaks ? maxLineLength : 0)
00025                         ("Separator", ConstByteArrayParameter(lineBreak))
00026                         ("Terminator", ConstByteArrayParameter(lineBreak))));
00027 }
00028 
00029 const int *Base64Decoder::GetDecodingLookupArray()
00030 {
00031         static bool s_initialized = false;
00032         static int s_array[256];
00033 
00034         if (!s_initialized)
00035         {
00036                 InitializeDecodingLookupArray(s_array, s_vec, 64, false);
00037                 s_initialized = true;
00038         }
00039         return s_array;
00040 }
00041 
00042 NAMESPACE_END

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