michael@0: // 7zMethodID.cpp
michael@0: 
michael@0: #include "StdAfx.h"
michael@0: 
michael@0: #include "7zMethodID.h"
michael@0: 
michael@0: namespace NArchive {
michael@0: namespace N7z {
michael@0: 
michael@0: static wchar_t GetHex(Byte value)
michael@0: {
michael@0:   return (value < 10) ? ('0' + value) : ('A' + (value - 10));
michael@0: }
michael@0: 
michael@0: static bool HexCharToInt(wchar_t value, Byte &result)
michael@0: {
michael@0:   if (value >= '0' && value <= '9')
michael@0:     result = value - '0';
michael@0:   else if (value >= 'a' && value <= 'f')
michael@0:     result = 10 + value - 'a';
michael@0:   else if (value >= 'A' && value <= 'F')
michael@0:     result = 10 + value - 'A';
michael@0:   else
michael@0:     return false;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: static bool TwoHexCharsToInt(wchar_t valueHigh, wchar_t valueLow, Byte &result)
michael@0: {
michael@0:   Byte resultHigh, resultLow;
michael@0:   if (!HexCharToInt(valueHigh, resultHigh))
michael@0:     return false;
michael@0:   if (!HexCharToInt(valueLow, resultLow))
michael@0:     return false;
michael@0:   result = (resultHigh << 4) + resultLow;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: UString CMethodID::ConvertToString() const
michael@0: {
michael@0:   UString result;
michael@0:   for (int i = 0; i < IDSize; i++)
michael@0:   {
michael@0:     Byte b = ID[i];
michael@0:     result += GetHex(b >> 4);
michael@0:     result += GetHex(b & 0xF);
michael@0:   }
michael@0:   return result;
michael@0: }
michael@0: 
michael@0: bool CMethodID::ConvertFromString(const UString &srcString)
michael@0: {
michael@0:   int length = srcString.Length();
michael@0:   if ((length & 1) != 0 || (length >> 1) > kMethodIDSize)
michael@0:     return false;
michael@0:   IDSize = length / 2;
michael@0:   UInt32 i;
michael@0:   for(i = 0; i < IDSize; i++)
michael@0:     if (!TwoHexCharsToInt(srcString[i * 2], srcString[i * 2 + 1], ID[i]))
michael@0:       return false;
michael@0:   for(; i < kMethodIDSize; i++)
michael@0:     ID[i] = 0;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: bool operator==(const CMethodID &a1, const CMethodID &a2)
michael@0: {
michael@0:   if (a1.IDSize != a2.IDSize)
michael@0:     return false;
michael@0:   for (UInt32 i = 0; i < a1.IDSize; i++)
michael@0:     if (a1.ID[i] != a2.ID[i])
michael@0:       return false;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: }}