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  • Subject: Re: ALTSEQ ?
  • From: "Repaca Chandrashekhar" <repaca@xxxxxxxxxxx>
  • Date: Sat, 10 Apr 1999 16:05:06 PDT

It is better to send such messages peronally, so that it will reduce 
net traffic. am right?
Pls. take it friendly,

thanks
Chandra
  



>From: "Shen Jianjun" <ipacsjj@public.sta.net.cn>
>Reply-To: RPG400-L@midrange.com
>To: <RPG400-L@midrange.com>
>Subject: Re: ALTSEQ ?
>Date: Fri, 2 Apr 1999 18:09:17 +0800
>
>
>Bruce, Thank you very much.
>
>
>
>-----Original Message-----
>From: bvining@VNET.IBM.COM <bvining@VNET.IBM.COM>
>To: RPG400-L@midrange.com <RPG400-L@midrange.com>
>Date: Thursday, April 01, 1999 4:33 AM
>Subject: ALTSEQ ?
>
>
>>RPG ALTSEQ (alternate collating sequence) allows you to control how
>>character data is sorted and compared.  For instance different 
cultures
>>prefer that certain characters sort/compare in different ways; an
>>example of this would be the Latin ligature AE (one character) where
>>many European nationalities prefer that AE sort/compare between 'a' 
and
>>'b' while Norwegian users may prefer AE sorts/compares after 'z'.   
As
>>another example, a user may prefer that 'a' sort/compare equal with 
'A'
>>(and not as before/notequal to 'A').  The attached ILE RPG program
>>shows simplistically how this can be controlled via the H spec 
ALTSEQ
>>keyword and CRTRPGPGM parameters.  This is a SIMPLE example, and in
>>real life one would probably use *JOBRUN values, but I didn't want 
to
>>introduce another level of indirection (though one very handy if you
>>want one *PGM to support many languages in a culturally correct 
manner)
>>for this example.
>>
>>Please note that the default behavior is Hex which means no one is
>>necessarily "culturally happy", but the program runs the fastest.
>>Introducing any collation sequence (other than Hex) will cause more
>>work (sometimes substantially more work) "under the covers" (though 
as
>>the sample shows, with the same source code).
>>
>>Bruce
>>
>>
>>     H* To test Hex collation comment out the following H spec
>>     H ALTSEQ(*EXT)
>>     H* To test Common Latin-1 collation leave the previous H spec 
and
>>     H* compile with CRTBNDRPG XXX SRTSEQ(*LANGIDUNQ) LANGID(ENU)
>>     H*
>>     H* To test Common Latin-1 collation leave the previous H spec 
and
>>     H* compile with CRTBNDRPG XXX SRTSEQ(*LANGIDUNQ) LANGID(NON)
>>     H*
>>     H* To test Common Latin-1 shared collation use previous H spec 
and
>>     H* compile with CRTBNDRPG XXX SRTSEQ(*LANGIDSHR) LANGID(ENU)
>>     D*
>>     D* Define some constants to check where codepoints collate
>>     DLatin_AE         s              1    inz(x'9E')
>>     DLatin_a          s              1    inz('a')
>>     DLatin_b          s              1    inz('b')
>>     DLatin_r          s              1    inz('r')
>>     DLatin_s          s              1    inz('s')
>>     DLatin_z          s              1    inz('z')
>>     C* check if between 'a' and 'b'; if so it's Common Latin-1 
sequence
>>     C     Latin_AE      ifgt      Latin_a
>>     C     Latin_AE      andlt     Latin_b
>>     C     'Common'      dsply
>>     C                   endif
>>     C* check if between 'r' and 's'; if so it's CCSID 37 Hex 
sequence
>>     C     Latin_AE      ifgt      Latin_r
>>     C     Latin_AE      andlt     Latin_s
>>     C     'Hex   '      dsply
>>     C                   endif
>>     C* check if after 'z'; if so it's Norwegian Bokmal sequence
>>     C     Latin_AE      ifgt      Latin_z
>>     C     'Bokmal'      dsply
>>     C                   endif
>>     C* check if equal 'a'; if so it's Shared weight
>>     C     Latin_AE      ifeq      Latin_a
>>     C     'Shared'      dsply
>>     C                   endif
>>     C                   move      '1'           *inlr
>>     C                   return
>>
>>
>>
>>>
>>>What does it means of the keyword ALTSEQ and the concept
>>>about the Collating Sequence?
>>>
>>>Thanks.
>>>
>>
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