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August 11, 2005
Re: UTF8 Encoding: Again (correction)
WOW!  I thought everything was over about the subject, and then, I hit the
newsgroup again and BOOM, all of these nice responses. :-)  Thanks folks.

jic

Regan Heath says...
>
>------------ZVb7U8x7kmqd0N1gRinYIz
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>On Wed, 10 Aug 2005 02:57:12 +0000 (UTC), jicman  
><jicman_member@pathlink.com> wrote:
>> Stefan Zobel says...
>>>
>>> In article <ddb989$jkm$1@digitaldaemon.com>, jicman says...
>>>>
>>>> Thanks for the help, Stefan.  The problem is much deeper than that.  I  
>>>> get input
>>>> string from a file which contains certain words, say "août" which I  
>>>> need to test
>>>> on.  The problem is that even though I have a test on the program,  
>>>> which
>>>> displays correctly, the test never matches because the input data,  
>>>> "août", and
>>>> the test data inside the program, "août", never match.
>>>
>>> Are you sure you're reading/interpreting the file as UTF8 (and it  
>>> actually is
>>> UTF8 encoded)?
>>
>> Well, here is a question: do I have to change the data that I work  
>> with?  For example, I have this 200+ files with text data which contain  
>> ASCII data with many different accented characters.  Do I need to change  
>> this input data to UTF8  to be able to work with it?
>
>Yes and No.
>
>As Derek said, if it has characters above 127 it's not ascii, see:
>   http://www.columbia.edu/kermit/csettables.html
>
>I suspect your data is "Microsoft Windows Code Page 1252" or "ISO 8859-1  
>Latin Alphabet 1" which are very similar.
>
>To figure it out open the text file in a binary editor and check the value  
>of an accented character and compare it to the tables in the links above.
>
>You can read and write these non UTF characters into a char[] etc,  
>provided you don't use writef or any other routine that actually checks  
>whether the characters are valid UTF, i.e. writeString works but writef  
>will give an exception.
>
>If you want to compare the data to static string you'll need to convert  
>the data to UTF. I have a small module which will convert windows code  
>page 1252 into UTF8, 16, and 32 and back again (tho the back again is  
>totally untested). I needed it for much the same thing as you do. This  
>code is public domain.
>
>Regan
>------------ZVb7U8x7kmqd0N1gRinYIz
>Content-Disposition: attachment; filename=cp1252.d
>Content-Type: application/octet-stream; name=cp1252.d
>Content-Transfer-Encoding: 8bit
>
>module cp1252;
>import std.utf;
>
>char[] cp1252toUTF8(ubyte[] raw)
>{
>	return toUTF8(cp1252toUTF16(raw));
>}
>
>wchar[] cp1252toUTF16(ubyte[] raw)
>{
>	wchar[] result;
>	
>	result.length = raw.length;
>	foreach(int i, ubyte b; raw)
>	{
>		if (b <= 0x80) result[i] = b;
>		else result[i] = table[b];
>	}
>	
>	return result;
>}
>
>dchar[] cp1252toUTF32(ubyte[] raw)
>{
>	return toUTF32(cp1252toUTF16(raw));
>}
>
>ushort[] table = [
>	0x0000, 0x0001, 0x0002, 0x0003, 0x0004, 0x0005, 0x0006, 0x0007, 0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E, 0x000F, 
>	0x0010, 0x0011, 0x0012, 0x0013, 0x0014, 0x0015, 0x0016, 0x0017, 0x0018, 0x0019, 0x001A, 0x001B, 0x001C, 0x001D, 0x001E, 0x001F, 
>	0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027, 0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F, 
>	0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F, 
>	0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x004E, 0x004F, 
>	0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 0x0058, 0x0059, 0x005A, 0x005B, 0x005C, 0x005D, 0x005E, 0x005F, 
>	0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F, 
>	0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 0x0078, 0x0079, 0x007A, 0x007B, 0x007C, 0x007D, 0x007E, 0x007F, 
>	0x20AC, 0x0000, 0x201A, 0x0192, 0x201E, 0x2026, 0x2020, 0x2021, 0x02C6, 0x2030, 0x0160, 0x2039, 0x0152, 0x0000, 0x017D, 0x0000, 
>	0x0000, 0x2018, 0x2019, 0x201C, 0x201D, 0x2022, 0x2013, 0x2014, 0x02DC, 0x2122, 0x0161, 0x203A, 0x0153, 0x0000, 0x017E, 0x0178, 
>	0x00A0, 0x00A1, 0x00A2, 0x00A3, 0x00A4, 0x00A5, 0x00A6, 0x00A7, 0x00A8, 0x00A9, 0x00AA, 0x00AB, 0x00AC, 0x00AD, 0x00AE, 0x00AF, 
>	0x00B0, 0x00B1, 0x00B2, 0x00B3, 0x00B4, 0x00B5, 0x00B6, 0x00B7, 0x00B8, 0x00B9, 0x00BA, 0x00BB, 0x00BC, 0x00BD, 0x00BE, 0x00BF, 
>	0x00C0, 0x00C1, 0x00C2, 0x00C3, 0x00C4, 0x00C5, 0x00C6, 0x00C7, 0x00C8, 0x00C9, 0x00CA, 0x00CB, 0x00CC, 0x00CD, 0x00CE, 0x00CF, 
>	0x00D0, 0x00D1, 0x00D2, 0x00D3, 0x00D4, 0x00D5, 0x00D6, 0x00D7, 0x00D8, 0x00D9, 0x00DA, 0x00DB, 0x00DC, 0x00DD, 0x00DE, 0x00DF, 
>	0x00E0, 0x00E1, 0x00E2, 0x00E3, 0x00E4, 0x00E5, 0x00E6, 0x00E7, 0x00E8, 0x00E9, 0x00EA, 0x00EB, 0x00EC, 0x00ED, 0x00EE, 0x00EF, 
>	0x00F0, 0x00F1, 0x00F2, 0x00F3, 0x00F4, 0x00F5, 0x00F6, 0x00F7, 0x00F8, 0x00F9, 0x00FA, 0x00FB, 0x00FC, 0x00FD, 0x00FE, 0x00FF
>];
>
>/* UNTESTED! */
>ubyte[] UTF16toCP1252(char[] raw)
>{
>	return UTF16toCP1252(toUTF16(raw));
>}
>
>ubyte[] UTF16toCP1252(wchar[] raw)
>{
>	ubyte[] result;
>	
>	result.length = raw.length;
>	foreach(int i, wchar c; raw)
>	{
>		foreach(int j, ushort s; table)
>		{
>			if (c == s)
>			{
>				result[i] = table[j];
>				goto found;
>			}
>		}
>		throw new Exception("Data cannot be encoded");
>	found:
>		;
>	}
>	
>	return result;
>}
>
>ubyte[] UTF16toCP1252(dchar[] raw)
>{
>	return UTF16toCP1252(toUTF16(raw));
>}
>
>------------ZVb7U8x7kmqd0N1gRinYIz--
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