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Qt by Nokia
66
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/Borland/NOTES
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66
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/Borland/NOTES
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Received: from 128.140.1.1 by ee.lbl.gov for <vern@ee.lbl.gov> (8.6.9/1.43r)
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id PAA03966; Tue, 24 Jan 1995 15:03:57 -0800
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Received: from larry-le0.cc.emory.edu by
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emoryu1.cc.emory.edu (5.65/Emory_cc.4.0.1) via SMTP
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id AA24158 ; Tue, 24 Jan 95 17:18:18 -0500
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From: tkane01@unix.cc.emory.edu (Terrence O Kane)
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Received: by larry.cc.emory.edu (5.0) id AA21979; Tue, 24 Jan 1995 17:17:40 -0500
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Message-Id: <9501242217.AA21979@larry.cc.emory.edu>
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Subject: Re: Beta test for DOS
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To: vern@ee.lbl.gov (Vern Paxson)
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Date: Tue, 24 Jan 1995 17:17:38 -0500 (EST)
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In-Reply-To: <199501232138.NAA11430@daffy.ee.lbl.gov> from "Vern Paxson" at Jan 23, 95 01:38:02 pm
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X-Mailer: ELM [version 2.4 PL23]
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Mime-Version: 1.0
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Content-Type: text/plain; charset=US-ASCII
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Content-Transfer-Encoding: 7bit
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Content-Length: 5792
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Vern,
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I've made flex 2.5.0.6 successfully with no changes to the source
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code at all. I'm including the Borland 4.02 makefile and config.h
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at the end of this message.
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When you're ready for release, I'll be happy to take care of getting
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the appropriate archive files up to Simtel if you wish.
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I have not used this version for any of my "work-related" scanners
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yet, but have run the fastwc benchmark. The compiles were for large
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memory model and optimization for fastest possible code. The test
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machine was a Pentium-90 (hey! timing output was integer!) with
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enhanced IDE on a PCI bus and no file system caching. I ran the
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test on two different input files.
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(Times are in seconds.)
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The first input was a typical postscript file concatenated 10 times;
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by typical, I mean that there were relatively few spaces, lots of lines
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with no space, using lots of parentheses.
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lines words characters
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91200 356260 5889240
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mywc 8.89
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wc1s 15.22 default
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wc1 10.82 -Cf
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wc2 10.16 -Cf
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wc3 9.17 -Cf
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wc4 9.22 -Cf
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wc5 10.98 -Cf
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The second test run was on a file that consisted of 20 concatenations
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of 'misc/flex.man'.
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lines words characters
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69960 305140 2399960
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mywc 4.01
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wc1s 6.87
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wc1 5.32
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wc2 4.95
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wc3 4.12
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wc4 4.12
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wc5 5.05
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[[Makefile and config.h moved to separate files -VP]]
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44
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/MVS/README
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44
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/MVS/README
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These patches and supplemental programs should allow porting to MVS or MVS/XA
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in an EBCDIC envrionment, using SAS C V4.00C.
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Included are:
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-rw-r--r-- 1 swl26 1573 Jul 17 14:32 README
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-rw-rw-r-- 1 swl26 20861 Jul 17 13:41 diffs
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-rw-rw-r-- 1 swl26 5022 Jul 17 14:00 fixit.l
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-rw-rw-r-- 1 swl26 97644 Jul 17 13:42 initscan.mvs.c
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-rw-rw-r-- 1 swl26 4898 Jul 17 14:08 unfixit.l
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The file "diffs" contains context diffs for changes to flex 2.3.
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The file "fixit.l" contains flex sources for a program to shorten external
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variable and function names to 8 characters or less. This is required for the
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"dumb" compiler linker used.
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The file "unfixit.l" reverses the changes in "fixit.l", to restore long names.
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This is useful when trying to build diff files as created here.
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The file "initscan.mvs.c" is an already "flexed" version of scan.l, in an
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EBCDIC environment.
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To install in an MVS environment, use patch to apply the diffs to flex 2.3,
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then run "fixit" on all .c, .h, .l, .y, and .skel files. Move the files
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to the MVS machine, and compile each of the .c files. (You will need a
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"yacc" functional equivalent under MVS to expand parse.y in that
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environment.) Link together, and the resulting flex should be ready to
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go. To test, run the MVSflex -is8 -Ce on the scan.l, and you should get
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back a file which is identical to initscan.mvs.c.
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Enjoy.
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Steven W. Layten
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Senior Engineer
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Chemical Abstracts Service
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PO Box 3012
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2540 Olentangy River Road
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Columbus, Ohio 43210
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+1 614 421 3600 extension 3451
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INET: swl26%cas.BITNET@CUNYVM.CUNY.Edu
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UUCP: osu-cis!chemabs!swl26
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BITNET: swl26@cas.bitnet
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76
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/README
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76
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/README
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Miscellaneous flex stuff. The items which have been tested with flex 2.5 are:
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- texinfo/, a subdirectory containing a "texinfo" version of flex(1)
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and the corresponding "info" files (contributed by Francois Pinard).
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- VMS/, a subdirectory containing makefiles, configuration files,
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run-time support, and installation notes for building flex 2.5
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on VMS (contributed by Pat Rankin).
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- Borland/ - makefile and config.h for Borland 4.02 compiler
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(contributed by Terrence O Kane, who notes that no source
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code changes were necessary).
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- NT/ - Makefile and config.h for NT, contributed by Stan Adermann.
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- OS2/ - Makefile and config.h for building flex under OS/2,
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contributed by Kai Uwe Rommel.
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- Amiga/: notes on building flex for the Amiga, contributed
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by Andreas Scherer.
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- parse.c, parse.h - output of running yacc (byacc, actually)
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on parse.y. If your system doesn't have a flavor of yacc available,
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copy these into the main flex source directory instead.
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- flex.man - preformatted version of flex man page
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The following have been tested using flex 2.4:
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- debflex.awk, an awk script for anotating flex debug output.
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It presently only works with gawk and mawk, not with "old"
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or "new" awk.
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- NeXT: ProjectBuilder.app support for use in the NeXT world.
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- Notes on building flex for the Macintosh using Think-C,
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in the Macintosh/ subdirectory.
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- testxxLexer.l, a sample C++ program that uses flex's scanner
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class option ("-+").
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- fastwc/, a subdirectory containing examples of how to use flex
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to write progressively higher-performance versions of the Unix
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"wc" utility. This certainly should work with 2.5, but hasn't
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been tested.
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- Borland.old/: notes on building flex 2.4 for Borland C++ 3.1
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on MS-DOS. These shouldn't be needed for flex 2.5. Included
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only in case you encounter unanticipated difficulties.
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- EBCDIC: contact information for building flex for EBCDIC.
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The following are all out-of-date with respect to flex release 2.4 (and
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in general up-to-date for flex 2.3):
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- Atari/Atari.patches, patches for porting flex to the Atari and
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to Minix.
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- A number of notes and Makefiles for compiling flex under MS-DOS,
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in the MSDOS/ subdirectory.
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- Notes on building flex for MVS, in the MVS/ subdirectory.
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If any of this is out-of-date and can be deleted, please let me know.
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And the following is included for compatibility with some broken versions
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of bison:
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- alloca.c, a public-domain, mostly-portable version of the
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alloca() routine (used by bison's parsers) written by D. A. Gwyn.
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Many thanks to those who contributed these files. Updated versions will
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be appreciated!
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56
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/fastwc/README
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56
gnuwin32/contrib/flex/2.5.4a/flex-2.5.4a/MISC/fastwc/README
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This directory contains some examples illustrating techniques for extracting
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high-performance from flex scanners. Each program implements a simplified
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version of the Unix "wc" tool: read text from stdin and print the number of
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characters, words, and lines present in the text. All programs were compiled
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using gcc (version unavailable, sorry) with the -O flag, and run on a
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SPARCstation 1+. The input used was a PostScript file, mainly containing
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figures, with the following "wc" counts:
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lines words characters
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214217 635954 2592172
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The basic principles illustrated by these programs are:
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- match as much text with each rule as possible
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- adding rules does not slow you down!
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- avoid backing up
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and the big caveat that comes with them is:
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- you buy performance with decreased maintainability; make
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sure you really need it before applying the above techniques.
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See the "Performance Considerations" section of flexdoc for more
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details regarding these principles.
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The different versions of "wc":
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mywc.c
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a simple but fairly efficient C version
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wc1.l a naive flex "wc" implementation
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wc2.l somewhat faster; adds rules to match multiple tokens at once
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wc3.l faster still; adds more rules to match longer runs of tokens
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wc4.l fastest; still more rules added; hard to do much better
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using flex (or, I suspect, hand-coding)
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wc5.l identical to wc3.l except one rule has been slightly
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shortened, introducing backing-up
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Timing results (all times in user CPU seconds):
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program time notes
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------- ---- -----
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wc1 16.4 default flex table compression (= -Cem)
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wc1 6.7 -Cf compression option
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/bin/wc 5.8 Sun's standard "wc" tool
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mywc 4.6 simple but better C implementation!
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wc2 4.6 as good as C implementation; built using -Cf
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wc3 3.8 -Cf
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wc4 3.3 -Cf
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wc5 5.7 -Cf; ouch, backing up is expensive
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