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