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!
#	Content
1	// 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	_rforeach (ext::Vector<byte_t>, byte, bytes) _rfor (byte_t, half, 0, 2) byte \|= hex(string[index++]) << half 4;
21
22	if (offset != 0)
23	{
24	bytes.InsertLast(0);
25
26	bytes.Last() \|= hex(string[0]);
27	bytes.Last() \|= signed_ && bytes.Last() > 7 ? 0xF0 : 0;
28	}
29	}
30
31	Hexadecimal::operator ext::String() const
32	{
33	ext::String string;
34
35	_rforeach (const ext::Vector<byte_t>, byte, bytes) _rfor (byte_t, half, 0, 2)
36	{
37	byte_t hex(0xF & byte >> half 4);
38
39	if (hex < 0xA) hex += '0'; else hex += 'A' - 0xA;
40
41	string.InsertLast(hex);
42	}
43
44	return string;
45	}
46
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	}