Crypto++  5.6.4
Free C++ class library of cryptographic schemes
hex.cpp
1 // hex.cpp - written and placed in the public domain by Wei Dai
2 
3 #include "pch.h"
4 
5 #ifndef CRYPTOPP_IMPORTS
6 
7 #include "hex.h"
8 
9 NAMESPACE_BEGIN(CryptoPP)
10 
11 static const byte s_vecUpper[] = "0123456789ABCDEF";
12 static const byte s_vecLower[] = "0123456789abcdef";
13 
14 void HexEncoder::IsolatedInitialize(const NameValuePairs &parameters)
15 {
16  bool uppercase = parameters.GetValueWithDefault(Name::Uppercase(), true);
18  parameters,
19  MakeParameters(Name::EncodingLookupArray(), uppercase ? &s_vecUpper[0] : &s_vecLower[0], false)(Name::Log2Base(), 4, true)));
20 }
21 
23 {
25  parameters,
26  MakeParameters(Name::DecodingLookupArray(), GetDefaultDecodingLookupArray(), false)(Name::Log2Base(), 4, true)));
27 }
28 
29 const int *HexDecoder::GetDefaultDecodingLookupArray()
30 {
31  static volatile bool s_initialized = false;
32  static int s_array[256];
33 
34  if (!s_initialized)
35  {
36  InitializeDecodingLookupArray(s_array, s_vecUpper, 16, true);
37  s_initialized = true;
38  }
39  return s_array;
40 }
41 
42 NAMESPACE_END
43 
44 #endif
Converts given data to base 16.
Definition: hex.h:16
Combines two sets of NameValuePairs.
Definition: algparam.h:135
static void InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive)
Intializes BaseN lookup array.
Definition: basecode.cpp:178
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: basecode.cpp:115
AlgorithmParameters MakeParameters(const char *name, const T &value, bool throwIfNotUsed=true)
Create an object that implements NameValuePairs.
Definition: algparam.h:554
Classes for HexEncoder and HexDecoder.
void Initialize(const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1)
Initialize or reinitialize this object, with signal propagation.
Definition: filters.cpp:71
Crypto++ library namespace.
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: hex.cpp:22
Interface for retrieving values given their names.
Definition: cryptlib.h:282