repos/Represent/Hexadecimal.cpp

// Represent
//
// Douglas Thrift
//
// $Id$

#include "Hexadecimal.hpp"

Hexadecimal::Hexadecimal(const ext::String& string, bool signed_) : Binary(string.GetSize() / 2, 0)
{
        if (string.IsEmpty())
        {
                bytes.InsertLast(0);

                return;
        }

        size_t index(string.GetSize() % 2), offset(index);

        _rforeach (ext::Vector<byte_t>, byte, bytes) _rfor (byte_t, half, 0, 2) *byte |= hex(string[index++]) << half * 4;

        if (offset != 0)
        {
                bytes.InsertLast(0);

                bytes.Last() |= hex(string[0]);
                bytes.Last() |= signed_ && bytes.Last() > 7 ? 0xF0 : 0;
        }
}

Hexadecimal::operator ext::String() const
{
        ext::String string;

        _rforeach (const ext::Vector<byte_t>, byte, bytes) _rfor (byte_t, half, 0, 2)
        {
                byte_t hex(0xF & *byte >> half * 4);

                if (hex < 0xA) hex += '0'; else hex += 'A' - 0xA;

                string.InsertLast(hex);
        }

        return string;
}

inline byte_t Hexadecimal::hex(const ext::CodePoint& atom)
{
        if (atom >= '0' && atom <= '9') return atom - '0'; else if (atom >= 'a' && atom <= 'f') return atom - 'a' + 0xA; else if (atom >= 'A' && atom <= 'F') return atom - 'A' + 0xA; else return 0;
}
Revision:	422
Committed:	2005-03-09T19:08:17-08:00 (20 years, 3 months ago) by douglas
File size:	1097 byte(s)
Log Message:	Gah! Menes is going crazy right now!
#	User	Rev	Content
1	douglas	371	// Represent
2			//
3			// Douglas Thrift
4			//
5			// $Id$
6
7			#include "Hexadecimal.hpp"
8
9			Hexadecimal::Hexadecimal(const ext::String& string, bool signed_) : Binary(string.GetSize() / 2, 0)
10			{
11			if (string.IsEmpty())
12			{
13			bytes.InsertLast(0);
14
15			return;
16			}
17
18			size_t index(string.GetSize() % 2), offset(index);
19
20	douglas	422	_rforeach (ext::Vector<byte_t>, byte, bytes) _rfor (byte_t, half, 0, 2) byte \|= hex(string[index++]) << half 4;
21	douglas	371
22			if (offset != 0)
23			{
24			bytes.InsertLast(0);
25
26	douglas	373	bytes.Last() \|= hex(string[0]);
27	douglas	398	bytes.Last() \|= signed_ && bytes.Last() > 7 ? 0xF0 : 0;
28	douglas	371	}
29			}
30
31			Hexadecimal::operator ext::String() const
32			{
33			ext::String string;
34
35	douglas	422	_rforeach (const ext::Vector<byte_t>, byte, bytes) _rfor (byte_t, half, 0, 2)
36	douglas	371	{
37			byte_t hex(0xF & byte >> half 4);
38
39	douglas	373	if (hex < 0xA) hex += '0'; else hex += 'A' - 0xA;
40	douglas	371
41			string.InsertLast(hex);
42			}
43
44			return string;
45			}
46	douglas	385
47			inline byte_t Hexadecimal::hex(const ext::CodePoint& atom)
48			{
49			if (atom >= '0' && atom <= '9') return atom - '0'; else if (atom >= 'a' && atom <= 'f') return atom - 'a' + 0xA; else if (atom >= 'A' && atom <= 'F') return atom - 'A' + 0xA; else return 0;
50			}