convert unicode to iransystem

mersad00

Hi there, i'm really in need of a convertor to convert unicode character map to iran system charachter map Please Help!

BobJanova

I don't know what the Iranian character set is but assuming it is a 256 character set a bit like the western one you can have a static map which specifies what Unicode code point each Iranian byte index represents. Then you can look up Unicode code points in that map, converting anything that isn't found to a ?.

Pascal Ganaye

I just had a look and this is a really interesting question. There are a few encoding in .NET that might be derived from the 'Iran System encoding standard' But they don't appear to be as described in the Wikipedia page[^].

708: Arabic (ASMO 708) - different
720: Arabic (DOS) - different
864: Arabic (864) - different
1256: Arabic (Windows) - different
10004: Arabic (Mac) - not found
20420: IBM EBCDIC (Arabic) - not found
28596: Arabic (ISO) - different

I thought it would be fun to try to write it then:

class IranianSystemEncoding
{
static char[] ByteToChar;
static Byte[][] CharToByte;

static IranianSystemEncoding()
{
    InitializeData();
}

static void InitializeData()
{
    var iranSystem = new int\[\] { 0x06F0, 0x06F1, 0x06F2, 0x06F3, 0x06F4, 0x06F5, 0x06F6, 0x06F7, 0x06F8, 0x06F9, 0x060C, 0x0640, 0x061F, 0xFE81, 0xFE8B, 0x0621, 0xFE8D, 0xFE8E, 0xFE8F, 0xFE91, 0xFB56, 0xFB58, 0xFE95, 0xFE97, 0xFE99, 0xFE9B, 0xFE9D, 0xFE9F, 0xFB7C, 0xFB7C, 0xFEA1, 0xFEA3, 0xFEA5, 0xFEA7, 0x062F, 0x0630, 0x0631, 0x0632, 0x0698, 0xFEB1, 0xFEB3, 0xFEB5, 0xFEB7, 0xFEB9, 0xFEBB, 0xFEBD, 0xFEBF, 0x0637, 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556, 0x2555, 0x2563, 0x2551, 0x2557, 0x255D, 0x255C, 0x255B, 0x2510, 0x2514, 0x2534, 0x252C, 0x251C, 0x2500, 0x253C, 0x255E, 0x255F, 0x255A, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256C, 0x2567, 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256B, 0x256A, 0x2518, 0x250C, 0x2588, 0x2584, 0x258C, 0x2590, 0x2580, 0x0638, 0xFEC9, 0xFECA, 0xFECC, 0xFECB, 0xFECD, 0xFECE, 0xFED0, 0xFECF, 0xFED1, 0xFED3, 0xFED5, 0xFED7, 0xFB8E, 0xFB90, 0xFB92, 0xFB94, 0xFEDD, 0xFEFB, 0xFEDF, 0xFEE1, 0xFEE3, 0xFEE5, 0xFEE7, 0x0648, 0xFEE9, 0xFEEC, 0xFEEB, 0xFBFD, 0xFBFC, 0xFBFE, 0x00A0 };
    ByteToChar = new char\[256\];
    // ascii first
    for (int i = 0; i < 128; i++) ByteToChar\[i\] = (char)i;
    // non-ascii
    for (int i = 128; i < 256; i++) ByteToChar\[i\] = (char)iranSystem\[i - 128\];

    // ok now reverse
    CharToByte = new Byte\[256\]\[\];
    for (int i = 0; i < 256; i++)
    {
        char ch = (char)ByteToChar\[i\];
        var low = ch & 0xff;
        var high = ch >> 8 & 0xff;

        var lowCharToByte = CharToByte\[high\];

Keith Barrow

I don't think there is a direct way to do this, from the brief research I did it looks like the Iran System is obsolete, though that doesn't help your problem. My advices is to create a Map which maps the numeric value of the Iranian System to the numeric equivalent in Unicode and vice versa. This isn't a huge problem but:

There isn't a map type in .net, which is a pity. You can fudge it a few ways, I've done it via dictionary (it is close with key/value instead of "key"/"key"), there is a discussion here[^]
Entering the numberic values by hand in code or config or somesuchis error prone. This[^] should help as there is a [almost] copy and paste value mapping

Internationized text is a real pain (as I'm learning to my cost), it is even worse for right-to-left languages such as Farsi.

Sort of a cross between Lawrence of Arabia and Dilbert.[^]
-Or-
A Dead ringer for Kate Winslett[^]