[info-mcl] (char-code ) inconsistencies

[Ron Garret]

More likely all you need to do is change the default encoding to latin-1.

On Mar 22, 2010, at 8:23 PM, Raymond Lee wrote:

> Hi Peter and Terje,
> 
>  Many thanks for your prompt and informative replies.  Because several uncompressed image 
> file formats (e.g., .psd  and  .bis) use the extended ASCII character-integer mapping, I'll need 
> to write a workaround for opening/saving such images.  But at least I know what the issue is 
> now.  Thanks again for your help,
> 
>  Ray Lee
> ---- Original message ----
>> Date: Mon, 22 Mar 2010 17:44:44 +0000
>> From: peter <p2.edoc at googlemail.com>  
>> Subject: Re: [info-mcl] (char-code ) inconsistencies  
>> To: Discussion list for MCL users <info-mcl at clozure.com>
>> 
>> At 10:34 AM -0700 10/3/22, Terje Norderhaug wrote:
>>> On Mar 22, 2010, at 10:06 AM, Raymond Lee wrote:
>>>> 
>>>>  The (char-code ) function's behavior has 
>>>> changed from MCL 5.x to RMCL 5.2.1 and now
>>>> appears quite inconsistent for ASCII 
>>>> characters > 127.  For example, in most fonts 
>>>> ASCII
>>>> character #  179 is mapped to the "greater than 
>>>> or equal to" character.  But now in RMCL
>>>> 
>>>> (char-code (character "„")) --> 8805
>>>>          whereas
>>>> (char-code (character 179)) --> 179
>>>> 
>>>>  Thus the problem surfaces when you try to 
>>>> coerce text (say, in an image file) to its ASCII
>>>> equivalent, but it won't appear if you call 
>>>> (char-code ) from its inverse, (character ). 
>>>> Most ASCII
>>>> characters > 127 exhibit similar problems.  Any 
>>>> solutions or ideas come to mind?
>>> 
>>> This is due that MCL 5.2 was upgraded to use 
>>> Unicode, for which 8805 (2265 hex) is the 
>>> "greater than or equal to" character.
>> 
>> Presumably hence char-code's fine, we're just 
>> inputting unicode now where we were using roman.
>> 
>> Isn't the lisp function >= rather than „.
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