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RE: Strange Characters


From: Gagneet Singh
Subject: RE: Strange Characters
Date: Thu, 25 Mar 2004 18:29:57 +0530

Hi!

Thank you for the explaination of this phenomenon.

I think I shall have to read about the different character sets before I
can form an opinion on what is to be done.. :-(

Thank You

Gagneet

>-----Original Message-----
>From: address@hidden [mailto:address@hidden On Behalf Of
>Mark D. Baushke
>Sent: Thursday, 25 March, 2004 13:08 PM
>To: address@hidden
>Cc: address@hidden
>Subject: Re: Strange Characters
>
>
>-----BEGIN PGP SIGNED MESSAGE-----
>Hash: SHA1
>
>Gagneet Singh <address@hidden> writes:
>
>> We are using a CVS repository on a GNU/Linux Red Hat 9.0 installed
>> distribution. The CVS server is 1.11.2 and the clients are all based
>> on Windows platform where the development is being done. These are
>> WinCVS version 1.3.10 and 1.3.13.
>>
>> Now the problem is that for the characters - "'x'" (without
>the double
>> quotes), when I checkout on a Windows system, they are being checked
>> out properly, but when we checked out the same on a Linux
>system they
>> appeared as - "~Qx~R" (without the double quotes).
>
>If you use a hex or octal dump program to actually look at the
>text (on the Linux box, the 'od' program with the -x switch
>will do the job), I believe you will see that your Windows
>text editor is 'helpfully' inserting characters other than the
>APOSTROPHE (') character which is hex 0x27 (aka octal 047, aka
>decimal 39) and is instead going into some a word processor
>mode to give you non-standard encodings for your string.
>
>The Microsoft Windows system has a non-standard character set
>that goes by the name of 'Microsoft Windows Codepage 1252'
>which is also known as CP1252. It uses most of the standard
>ISO-8859-1 character set encodings, but extends things for a
>few encodings of its own.
>
>My guess is that you are running into the problem of your
>editor being 'helpful' to you and mixing the concept of a LEFT
>QUOTE CHARACTER and a RIGHT QUOTE CHARACTER with the
>APOSTROPHE character that you really want for your C program.
>
>See http://www.microsoft.com/typography/unicode/1252.htm for
>the full table, but here is an extract:
>
> 1252      Uindex      UISOname
> ...
> 27        0027        APOSTROPHE
> ...
> 91        2018        LEFT SINGLE QUOTATION MARK
> 92        2019        RIGHT SINGLE QUOTATION MARK
> ...
>
>The rest of your environment is probably trying to live in the
>ISO-8859-1 (aka ISO LATIN 1) character set world.
>
>There is probably a way to fix your Windows editor to avoid
>this problem and use a straight ISO-8859-1 character set
>APOSTROPHE. However, I am not a fellow that uses Windows and
>am not sure of the answer.
>
>> I checked up in the Repository files lying on the server and
>I got the
>> same text - "~Qx~R" (without the double quotes).
>>
>> Is this the normal behaviour of the CVS repository files to
>change the
>> - "'x'" (without the double quotes) characters into "~Qx~R" (without
>> the double quotes) when getting the files from a Windows system to a
>> GNU/Linux System.
>>
>> The condition has been observed only for the lines which are inside
>> the C block comment lines.
>>
>> Actual file on Windows Systems:
>> /* The underscore character '_' is to be replaced in the following
>> code segment with '-' */ if ('_' == UNDER_SCORE)
>> {
>> .
>> .
>> .
>> }
>>
>>
>> Actual file as seen in the GNU/Linux CVS Repository:
>> /* The underscore character ~Q_~R is to be replaced in the following
>> code segment with '-' */ if ('_' == UNDER_SCORE)
>> {
>> .
>> .
>> .
>> }
>>
>>
>> Is there some way to rectify this problem so that the
>checkout in both
>> the Windows and the GNU/Linux systems is the same??
>
>The Windows world should be able to live with an ISO-8859-1
>character set. I suggest you try to change from CP1252 to
>ISO-8859-1 when writing programs. There should be a way to do
>this, I just don't know what it is.
>
>       Good luck,
>       -- Mark
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