56 lines
2.2 KiB
Text
56 lines
2.2 KiB
Text
(Message inbox:40)
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Date: Tue, 17 Jul 1990 11:56 EDT
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From: swl26%CAS.BITNET@CORNELLC.cit.cornell.edu
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Subject: Re(2): port of flex-2.3 to IBM/MVS
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To: vern@cs.cornell.edu
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>Message received. I'm sending this response to
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>swl26%CAS.BITNET@CORNELLC.cit.cornell.edu.
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Great -- we can talk.
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>How extensive are the diffs? If they're fairly short then yes, please
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>send them. If they're pretty involved then probably not, as I'm not aware
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>of many MVS flex users ...
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I've built a context diff file which is ~850 lines.
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Summary of major changes necessary:
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o a new initscan.c -- because MVS is ebcdic, the initial scanner had
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to be changed. I built a scanner from scan.l using -Ce, then
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hand-manipulated the yy_ec table to fit EBCDIC instead of ASCII
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chars. (This is not included in the diff file above.)
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o changes in main and flexdef.h to change how files are handled. (No
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dynamic file names, etc.)
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o Some lines had to be shortened to 80 bytes. This mostly impacted
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your RCSID lines, which with the full path name were too long.
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o SASC and the linker don't allow externals to be longer than 8 chars.
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I thus wrote a Q&D program to shorten all externals. (This would be
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a separate file 'fixit.l', which is not included in the diffs.)
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o There are several places where there are tests for 'isascii' (which I
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deleted conditionally, using #ifdefs), and tests for 'A' <= x <= 'Z'
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which I changed to 'isupper'.
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Many of the changes I've incorporated without impacting other systems.
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Others are with 'ifdefs'. Still others (the short external names and new
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initscan) are 'isolable' as separate files which would have to be
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included with a distribution.
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Obviously, you are not going to want to (even if you can :-) ) worry about
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testing new versions in the MVS environment. Likewise, I don't have the
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time or resources to provide much support. (I'm not sure my management
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would allow any :-( )
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With all of the above feel free to say "Thanks, but no thanks." If you
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want to see the diffs anyway, I will certainly mail them.
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Thanks for your time and efforts.
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Steve Layten
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Chemical Abstracts Service, PO Box 3012, Columbus, OH 43210, +1 614 421-3600
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INET: swl26%cas.BITNET@CUNYVM.CUNY.Edu
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