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