95 lines
3.8 KiB
Plaintext
95 lines
3.8 KiB
Plaintext
/****************************************************************
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Copyright (C) Lucent Technologies 1997
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and
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its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name Lucent Technologies or any of
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its entities not be used in advertising or publicity pertaining
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to distribution of the software without specific, written prior
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permission.
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LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
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IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
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SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
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IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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THIS SOFTWARE.
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****************************************************************/
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This is the version of awk described in "The AWK Programming Language",
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by Al Aho, Brian Kernighan, and Peter Weinberger
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(Addison-Wesley, 1988, ISBN 0-201-07981-X).
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Changes, mostly bug fixes and occasional enhancements, are listed
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in FIXES. If you distribute this code further, please please please
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distribute FIXES with it. If you find errors, please report them
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to bwk@bell-labs.com. Thanks.
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The program itself is created by
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make
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which should produce a sequence of messages roughly like this:
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yacc -d awkgram.y
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conflicts: 43 shift/reduce, 85 reduce/reduce
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mv y.tab.c ytab.c
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mv y.tab.h ytab.h
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cc -c ytab.c
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cc -c b.c
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cc -c main.c
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cc -c parse.c
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cc maketab.c -o maketab
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./maketab >proctab.c
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cc -c proctab.c
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cc -c tran.c
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cc -c lib.c
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cc -c run.c
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cc -c lex.c
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cc ytab.o b.o main.o parse.o proctab.o tran.o lib.o run.o lex.o -lm
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This produces an executable a.out; you will eventually want to
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move this to some place like /usr/bin/awk.
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If your system does not have yacc or bison (the GNU
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equivalent), you must compile the pieces manually. We have
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included yacc output in ytab.c and ytab.h, and backup copies in
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case you overwrite them. We have also included a copy of
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proctab.c so you do not need to run maketab.
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NOTE: This version uses ANSI C, as you should also. We have
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compiled this without any changes using gcc -Wall and/or local C
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compilers on a variety of systems, but new systems or compilers
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may raise some new complaint; reports of difficulties are
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welcome.
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This also compiles with Visual C++ on all flavors of Windows,
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*if* you provide versions of popen and pclose. The file
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missing95.c contains versions that can be used to get started
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with, though the underlying support has mysterious properties,
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the symptom of which can be truncated pipe output. Beware. The
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file makefile.win gives hints on how to proceed; if you run
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vcvars32.bat, it will set up necessary paths and parameters so
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you can subsequently run nmake -f makefile.win. Beware also that
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when running on Windows under command.com, various quoting
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conventions are different from Unix systems: single quotes won't
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work around arguments, and various characters like % are
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interpreted within double quotes.
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This compiles without change on Macintosh OS X using gcc and
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the standard developer tools.
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This is also said to compile on Macintosh OS 9 systems, using the
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file "buildmac" provided by Dan Allen (danallen@microsoft.com),
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to whom many thanks.
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The version of malloc that comes with some systems is sometimes
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astonishly slow. If awk seems slow, you might try fixing that.
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More generally, turning on optimization can significantly improve
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awk's speed, perhaps by 1/3 for highest levels.
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