858 lines
30 KiB
Plaintext
858 lines
30 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 file lists all bug fixes, changes, etc., made since the AWK book
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was sent to the printers in August, 1987.
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Nov 22, 2003:
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fixed a bug in regular expressions that dates (so help me) from 1977;
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it's been there from the beginning. an anchored longest match that
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was longer than the number of states triggered a failure to initialize
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the machine properly. many thanks to moinak ghosh for not only finding
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this one but for providing a fix, in some of the most mysterious
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code known to man.
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fixed a storage leak in call() that appears to have been there since
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1983 or so -- a function without an explicit return that assigns a
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string to a parameter leaked a Cell. thanks to moinak ghosh for
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spotting this very subtle one.
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Jul 31, 2003:
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fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
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that mis-handled the character 255 in input. (it was being compared
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to EOF with a signed comparison.)
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Jul 29, 2003:
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fixed (i think) the long-standing botch that included the beginning of
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line state ^ for RE's in the set of valid characters; this led to a
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variety of odd problems, including failure to properly match certain
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regular expressions in non-US locales. thanks to ruslan for keeping
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at this one.
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Jul 28, 2003:
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n-th try at getting internationalization right, with thanks to volker
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kiefel, arnold robbins and ruslan ermilov for advice, though they
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should not be blamed for the outcome. according to posix, "." is the
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radix character in programs and command line arguments regardless of
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the locale; otherwise, the locale should prevail for input and output
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of numbers. so it's intended to work that way.
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i have rescinded the attempt to use strcoll in expanding shorthands in
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regular expressions (cclenter). its properties are much too
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surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
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in locale fr_CA. i can see how this might arise by implementation
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but i cannot explain it to a human user. (this behavior can be seen
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in gawk as well; we're leaning on the same library.)
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the issue appears to be that strcoll is meant for sorting, where
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merging upper and lower case may make sense (though note that unix
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sort does not do this by default either). it is not appropriate
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for regular expressions, where the goal is to match specific
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patterns of characters. in any case, the notations [:lower:], etc.,
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are available in awk, and they are more likely to work correctly in
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most locales.
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a moratorium is hereby declared on internationalization changes.
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i apologize to friends and colleagues in other parts of the world.
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i would truly like to get this "right", but i don't know what
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that is, and i do not want to keep making changes until it's clear.
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Jul 4, 2003:
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fixed bug that permitted non-terminated RE, as in "awk /x".
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Jun 1, 2003:
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subtle change to split: if source is empty, number of elems
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is always 0 and the array is not set.
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Mar 21, 2003:
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added some parens to isblank, in another attempt to make things
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internationally portable.
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Mar 14, 2003:
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the internationalization changes, somewhat modified, are now
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reinstated. in theory awk will now do character comparisons
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and case conversions in national language, but "." will always
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be the decimal point separator on input and output regardless
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of national language. isblank(){} has an #ifndef.
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this no longer compiles on windows: LC_MESSAGES isn't defined
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in vc6++.
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fixed subtle behavior in field and record splitting: if FS is
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a single character and RS is not empty, \n is NOT a separator.
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this tortuous reading is found in the awk book; behavior now
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matches gawk and mawk.
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Dec 13, 2002:
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for the moment, the internationalization changes of nov 29 are
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rolled back -- programs like x = 1.2 don't work in some locales,
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because the parser is expecting x = 1,2. until i understand this
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better, this will have to wait.
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Nov 29, 2002:
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modified b.c (with tiny changes in main and run) to support
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locales, using strcoll and iswhatever tests for posix character
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classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
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the function isblank doesn't seem to have propagated to any
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header file near me, so it's there explicitly. not properly
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tested on non-ascii character sets by me.
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Jun 28, 2002:
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modified run/format() and tran/getsval() to do a slightly better
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job on using OFMT for output from print and CONVFMT for other
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number->string conversions, as promised by posix and done by
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gawk and mawk. there are still places where it doesn't work
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right if CONVFMT is changed; by then the STR attribute of the
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variable has been irrevocably set. thanks to arnold robbins for
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code and examples.
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fixed subtle bug in format that could get core dump. thanks to
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Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
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minor cleanup in run.c / format() at the same time.
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added some tests for null pointers to debugging printf's, which
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were never intended for external consumption. thanks to dave
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kerns (dkerns@lucent.com) for pointing this out.
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GNU compatibility: an empty regexp matches anything (thanks to
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dag-erling smorgrav, des@ofug.org). subject to reversion if
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this does more harm than good.
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pervasive small changes to make things more const-correct, as
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reported by gcc's -Wwrite-strings. as it says in the gcc manual,
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this may be more nuisance than useful. provoked by a suggestion
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and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
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minor documentation changes to note that this now compiles out
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of the box on Mac OS X.
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Feb 10, 2002:
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changed types in posix chars structure to quiet solaris cc.
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Jan 1, 2002:
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fflush() or fflush("") flushes all files and pipes.
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length(arrayname) returns number of elements; thanks to
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arnold robbins for suggestion.
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added a makefile.win to make it easier to build on windows.
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based on dan allen's buildwin.bat.
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Nov 16, 2001:
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added support for posix character class names like [:digit:],
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which are not exactly shorter than [0-9] and perhaps no more
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portable. thanks to dag-erling smorgrav for code.
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Feb 16, 2001:
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removed -m option; no longer needed, and it was actually
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broken (noted thanks to volker kiefel).
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Feb 10, 2001:
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fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
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and period was accepted as a valid number if it started with a period.
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this would never have happened with the lex version.
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other 1-character botches, now fixed, include a bare $ and a
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bare " at the end of the input.
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Feb 7, 2001:
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more (const char *) casts in b.c and tran.c to silence warnings.
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Nov 15, 2000:
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fixed a bug introduced in august 1997 that caused expressions
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like $f[1] to be syntax errors. thanks to arnold robbins for
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noticing this and providing a fix.
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Oct 30, 2000:
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fixed some nextfile bugs: not handling all cases. thanks to
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arnold robbins for pointing this out. new regressions added.
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close() is now a function. it returns whatever the library
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fclose returns, and -1 for closing a file or pipe that wasn't
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opened.
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Sep 24, 2000:
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permit \n explicitly in character classes; won't work right
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if comes in as "[\n]" but ok as /[\n]/, because of multiple
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processing of \'s. thanks to arnold robbins.
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July 5, 2000:
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minor fiddles in tran.c to keep compilers happy about uschar.
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thanks to norman wilson.
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May 25, 2000:
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yet another attempt at making 8-bit input work, with another
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band-aid in b.c (member()), and some (uschar) casts to head
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off potential errors in subscripts (like isdigit). also
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changed HAT to NCHARS-2. thanks again to santiago vila.
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changed maketab.c to ignore apparently out of range definitions
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instead of halting; new freeBSD generates one. thanks to
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jon snader <jsnader@ix.netcom.com> for pointing out the problem.
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May 2, 2000:
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fixed an 8-bit problem in b.c by making several char*'s into
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unsigned char*'s. not clear i have them all yet. thanks to
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Santiago Vila <sanvila@unex.es> for the bug report.
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Apr 21, 2000:
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finally found and fixed a memory leak in function call; it's
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been there since functions were added ~1983. thanks to
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jon bentley for the test case that found it.
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added test in envinit to catch environment "variables" with
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names begining with '='; thanks to Berend Hasselman.
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Jul 28, 1999:
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added test in defn() to catch function foo(foo), which
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otherwise recurses until core dump. thanks to arnold
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robbins for noticing this.
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Jun 20, 1999:
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added *bp in gettok in lex.c; appears possible to exit function
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without terminating the string. thanks to russ cox.
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Jun 2, 1999:
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added function stdinit() to run to initialize files[] array,
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in case stdin, etc., are not constants; some compilers care.
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May 10, 1999:
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replaced the ERROR ... FATAL, etc., macros with functions
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based on vprintf, to avoid problems caused by overrunning
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fixed-size errbuf array. thanks to ralph corderoy for the
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impetus, and for pointing out a string termination bug in
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qstring as well.
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Apr 21, 1999:
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fixed bug that caused occasional core dumps with commandline
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variable with value ending in \. (thanks to nelson beebe for
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the test case.)
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Apr 16, 1999:
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with code kindly provided by Bruce Lilly, awk now parses
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/=/ and similar constructs more sensibly in more places.
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Bruce also provided some helpful test cases.
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Apr 5, 1999:
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changed true/false to True/False in run.c to make it
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easier to compile with C++. Added some casts on malloc
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and realloc to be honest about casts; ditto. changed
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ltype int to long in struct rrow to reduce some 64-bit
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complaints; other changes scattered throughout for the
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same purpose. thanks to Nelson Beebe for these portability
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improvements.
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removed some horrible pointer-int casting in b.c and elsewhere
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by adding ptoi and itonp to localize the casts, which are
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all benign. fixed one incipient bug that showed up on sgi
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in 64-bit mode.
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reset lineno for new source file; include filename in error
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message. also fixed line number error in continuation lines.
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(thanks to Nelson Beebe for both of these.)
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Mar 24, 1999:
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Nelson Beebe notes that irix 5.3 yacc dies with a bogus
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error; use a newer version or switch to bison, since sgi
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is unlikely to fix it.
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Mar 5, 1999:
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changed isnumber to is_number to avoid the problem caused by
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versions of ctype.h that include the name isnumber.
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distribution now includes a script for building on a Mac,
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thanks to Dan Allen.
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Feb 20, 1999:
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fixed memory leaks in run.c (call) and tran.c (setfval).
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thanks to Stephen Nutt for finding these and providing the fixes.
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Jan 13, 1999:
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replaced srand argument by (unsigned int) in run.c;
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avoids problem on Mac and potentially on Unix & Windows.
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thanks to Dan Allen.
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added a few (int) casts to silence useless compiler warnings.
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e.g., errorflag= in run.c jump().
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added proctab.c to the bundle outout; one less thing
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to have to compile out of the box.
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added calls to _popen and _pclose to the win95 stub for
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pipes (thanks to Steve Adams for this helpful suggestion).
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seems to work, though properties are not well understood
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by me, and it appears that under some circumstances the
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pipe output is truncated. Be careful.
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Oct 19, 1998:
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fixed a couple of bugs in getrec: could fail to update $0
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after a getline var; because inputFS wasn't initialized,
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could split $0 on every character, a misleading diversion.
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fixed caching bug in makedfa: LRU was actually removing
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least often used.
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thanks to ross ridge for finding these, and for providing
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great bug reports.
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May 12, 1998:
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fixed potential bug in readrec: might fail to update record
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pointer after growing. thanks to dan levy for spotting this
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and suggesting the fix.
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Mar 12, 1998:
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added -V to print version number and die.
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Feb 11, 1998:
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subtle silent bug in lex.c: if the program ended with a number
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longer than 1 digit, part of the input would be pushed back and
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parsed again because token buffer wasn't terminated right.
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example: awk 'length($0) > 10'. blush. at least i found it
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myself.
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Aug 31, 1997:
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s/adelete/awkdelete/: SGI uses this in malloc.h.
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thanks to nelson beebe for pointing this one out.
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Aug 21, 1997:
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fixed some bugs in sub and gsub when replacement includes \\.
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this is a dark, horrible corner, but at least now i believe that
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the behavior is the same as gawk and the intended posix standard.
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thanks to arnold robbins for advice here.
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Aug 9, 1997:
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somewhat regretfully, replaced the ancient lex-based lexical
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analyzer with one written in C. it's longer, generates less code,
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and more portable; the old one depended too much on mysterious
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properties of lex that were not preserved in other environments.
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in theory these recognize the same language.
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now using strtod to test whether a string is a number, instead of
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the convoluted original function. should be more portable and
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reliable if strtod is implemented right.
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removed now-pointless optimization in makefile that tries to avoid
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recompilation when awkgram.y is changed but symbols are not.
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removed most fixed-size arrays, though a handful remain, some
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of which are unchecked. you have been warned.
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Aug 4, 1997:
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with some trepidation, replaced the ancient code that managed
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fields and $0 in fixed-size arrays with arrays that grow on
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demand. there is still some tension between trying to make this
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run fast and making it clean; not sure it's right yet.
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the ill-conceived -mr and -mf arguments are now useful only
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for debugging. previous dynamic string code removed.
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numerous other minor cleanups along the way.
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Jul 30, 1997:
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using code provided by dan levy (to whom profuse thanks), replaced
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fixed-size arrays and awkward kludges by a fairly uniform mechanism
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to grow arrays as needed for printf, sub, gsub, etc.
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Jul 23, 1997:
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falling off the end of a function returns "" and 0, not 0.
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thanks to arnold robbins.
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Jun 17, 1997:
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replaced several fixed-size arrays by dynamically-created ones
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in run.c; added overflow tests to some previously unchecked cases.
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getline, toupper, tolower.
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getline code is still broken in that recursive calls may wind
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up using the same space. [fixed later]
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increased RECSIZE to 8192 to push problems further over the horizon.
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added \r to \n as input line separator for programs, not data.
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damn CRLFs.
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modified format() to permit explicit printf("%c", 0) to include
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a null byte in output. thanks to ken stailey for the fix.
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added a "-safe" argument that disables file output (print >,
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print >>), process creation (cmd|getline, print |, system), and
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access to the environment (ENVIRON). this is a first approximation
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to a "safe" version of awk, but don't rely on it too much. thanks
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to joan feigenbaum and matt blaze for the inspiration long ago.
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Jul 8, 1996:
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fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
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ralph corderoy.
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Jun 29, 1996:
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fixed awful bug in new field splitting; didn't get all the places
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where input was done.
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Jun 28, 1996:
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changed field-splitting to conform to posix definition: fields are
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split using the value of FS at the time of input; it used to be
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the value when the field or NF was first referred to, a much less
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predictable definition. thanks to arnold robbins for encouragement
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to do the right thing.
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May 28, 1996:
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fixed appalling but apparently unimportant bug in parsing octal
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numbers in reg exprs.
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explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
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May 27, 1996:
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cleaned up some declarations so gcc -Wall is now almost silent.
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makefile now includes backup copies of ytab.c and lexyy.c in case
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one makes before looking; it also avoids recreating lexyy.c unless
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really needed.
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s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
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with unwisely-written header files.
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thanks to jeffrey friedl for several of these.
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May 26, 1996:
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an attempt to rationalize the (unsigned) char issue. almost all
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instances of unsigned char have been removed; the handful of places
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in b.c where chars are used as table indices have been hand-crafted.
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added some latin-1 tests to the regression, but i'm not confident;
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none of my compilers seem to care much. thanks to nelson beebe for
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pointing out some others that do care.
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May 2, 1996:
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removed all register declarations.
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enhanced split(), as in gawk, etc: split(s, a, "") splits s into
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a[1]...a[length(s)] with each character a single element.
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made the same changes for field-splitting if FS is "".
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added nextfile, as in gawk: causes immediate advance to next
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input file. (thanks to arnold robbins for inspiration and code).
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small fixes to regexpr code: can now handle []], [[], and
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variants; [] is now a syntax error, rather than matching
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everything; [z-a] is now empty, not z. far from complete
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or correct, however. (thanks to jeffrey friedl for pointing out
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some awful behaviors.)
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Apr 29, 1996:
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replaced uchar by uschar everwhere; apparently some compilers
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usurp this name and this causes conflicts.
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fixed call to time in run.c (bltin); arg is time_t *.
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replaced horrible pointer/long punning in b.c by a legitimate
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union. should be safer on 64-bit machines and cleaner everywhere.
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(thanks to nelson beebe for pointing out some of these problems.)
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replaced nested comments by #if 0...#endif in run.c, lib.c.
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removed getsval, setsval, execute macros from run.c and lib.c.
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machines are 100x faster than they were when these macros were
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first used.
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revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
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y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
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portability to nameless systems.
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"make bundle" now includes yacc and lex output files for recipients
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who don't have yacc or lex.
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Aug 15, 1995:
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initialized Cells in setsymtab more carefully; some fields
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were not set. (thanks to purify, all of whose complaints i
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think i now understand.)
|
|
|
|
fixed at least one error in gsub that looked at -1-th element
|
|
of an array when substituting for a null match (e.g., $).
|
|
|
|
delete arrayname is now legal; it clears the elements but leaves
|
|
the array, which may not be the right behavior.
|
|
|
|
modified makefile: my current make can't cope with the test used
|
|
to avoid unnecessary yacc invocations.
|
|
|
|
Jul 17, 1995:
|
|
added dynamically growing strings to awk.lx.l and b.c
|
|
to permit regular expressions to be much bigger.
|
|
the state arrays can still overflow.
|
|
|
|
Aug 24, 1994:
|
|
detect duplicate arguments in function definitions (mdm).
|
|
|
|
May 11, 1994:
|
|
trivial fix to printf to limit string size in sub().
|
|
|
|
Apr 22, 1994:
|
|
fixed yet another subtle self-assignment problem:
|
|
$1 = $2; $1 = $1 clobbered $1.
|
|
|
|
Regression tests now use private echo, to avoid quoting problems.
|
|
|
|
Feb 2, 1994:
|
|
changed error() to print line number as %d, not %g.
|
|
|
|
Jul 23, 1993:
|
|
cosmetic changes: increased sizes of some arrays,
|
|
reworded some error messages.
|
|
|
|
added CONVFMT as in posix (just replaced OFMT in getsval)
|
|
|
|
FILENAME is now "" until the first thing that causes a file
|
|
to be opened.
|
|
|
|
Nov 28, 1992:
|
|
deleted yyunput and yyoutput from proto.h;
|
|
different versions of lex give these different declarations.
|
|
|
|
May 31, 1992:
|
|
added -mr N and -mf N options: more record and fields.
|
|
these really ought to adjust automatically.
|
|
|
|
cleaned up some error messages; "out of space" now means
|
|
malloc returned NULL in all cases.
|
|
|
|
changed rehash so that if it runs out, it just returns;
|
|
things will continue to run slow, but maybe a bit longer.
|
|
|
|
Apr 24, 1992:
|
|
remove redundant close of stdin when using -f -.
|
|
|
|
got rid of core dump with -d; awk -d just prints date.
|
|
|
|
Apr 12, 1992:
|
|
added explicit check for /dev/std(in,out,err) in redirection.
|
|
unlike gawk, no /dev/fd/n yet.
|
|
|
|
added (file/pipe) builtin. hard to test satisfactorily.
|
|
not posix.
|
|
|
|
Feb 20, 1992:
|
|
recompile after abortive changes; should be unchanged.
|
|
|
|
Dec 2, 1991:
|
|
die-casting time: converted to ansi C, installed that.
|
|
|
|
Nov 30, 1991:
|
|
fixed storage leak in freefa, failing to recover [N]CCL.
|
|
thanks to Bill Jones (jones@cs.usask.ca)
|
|
|
|
Nov 19, 1991:
|
|
use RAND_MAX instead of literal in builtin().
|
|
|
|
Nov 12, 1991:
|
|
cranked up some fixed-size arrays in b.c, and added a test for
|
|
overflow in penter. thanks to mark larsen.
|
|
|
|
Sep 24, 1991:
|
|
increased buffer in gsub. a very crude fix to a general problem.
|
|
and again on Sep 26.
|
|
|
|
Aug 18, 1991:
|
|
enforce variable name syntax for commandline variables: has to
|
|
start with letter or _.
|
|
|
|
Jul 27, 1991:
|
|
allow newline after ; in for statements.
|
|
|
|
Jul 21, 1991:
|
|
fixed so that in self-assignment like $1=$1, side effects
|
|
like recomputing $0 take place. (this is getting subtle.)
|
|
|
|
Jun 30, 1991:
|
|
better test for detecting too-long output record.
|
|
|
|
Jun 2, 1991:
|
|
better defense against very long printf strings.
|
|
made break and continue illegal outside of loops.
|
|
|
|
May 13, 1991:
|
|
removed extra arg on gettemp, tempfree. minor error message rewording.
|
|
|
|
May 6, 1991:
|
|
fixed silly bug in hex parsing in hexstr().
|
|
removed an apparently unnecessary test in isnumber().
|
|
warn about weird printf conversions.
|
|
fixed unchecked array overwrite in relex().
|
|
|
|
changed for (i in array) to access elements in sorted order.
|
|
then unchanged it -- it really does run slower in too many cases.
|
|
left the code in place, commented out.
|
|
|
|
Feb 10, 1991:
|
|
check error status on all writes, to avoid banging on full disks.
|
|
|
|
Jan 28, 1991:
|
|
awk -f - reads the program from stdin.
|
|
|
|
Jan 11, 1991:
|
|
failed to set numeric state on $0 in cmd|getline context in run.c.
|
|
|
|
Nov 2, 1990:
|
|
fixed sleazy test for integrality in getsval; use modf.
|
|
|
|
Oct 29, 1990:
|
|
fixed sleazy buggy code in lib.c that looked (incorrectly) for
|
|
too long input lines.
|
|
|
|
Oct 14, 1990:
|
|
fixed the bug on p. 198 in which it couldn't deduce that an
|
|
argument was an array in some contexts. replaced the error
|
|
message in intest() by code that damn well makes it an array.
|
|
|
|
Oct 8, 1990:
|
|
fixed horrible bug: types and values were not preserved in
|
|
some kinds of self-assignment. (in assign().)
|
|
|
|
Aug 24, 1990:
|
|
changed NCHARS to 256 to handle 8-bit characters in strings
|
|
presented to match(), etc.
|
|
|
|
Jun 26, 1990:
|
|
changed struct rrow (awk.h) to use long instead of int for lval,
|
|
since cfoll() stores a pointer in it. now works better when int's
|
|
are smaller than pointers!
|
|
|
|
May 6, 1990:
|
|
AVA fixed the grammar so that ! is uniformly of the same precedence as
|
|
unary + and -. This renders illegal some constructs like !x=y, which
|
|
now has to be parenthesized as !(x=y), and makes others work properly:
|
|
!x+y is (!x)+y, and x!y is x !y, not two pattern-action statements.
|
|
(These problems were pointed out by Bob Lenk of Posix.)
|
|
|
|
Added \x to regular expressions (already in strings).
|
|
Limited octal to octal digits; \8 and \9 are not octal.
|
|
Centralized the code for parsing escapes in regular expressions.
|
|
Added a bunch of tests to T.re and T.sub to verify some of this.
|
|
|
|
Feb 9, 1990:
|
|
fixed null pointer dereference bug in main.c: -F[nothing]. sigh.
|
|
|
|
restored srand behavior: it returns the current seed.
|
|
|
|
Jan 18, 1990:
|
|
srand now returns previous seed value (0 to start).
|
|
|
|
Jan 5, 1990:
|
|
fix potential problem in tran.c -- something was freed,
|
|
then used in freesymtab.
|
|
|
|
Oct 18, 1989:
|
|
another try to get the max number of open files set with
|
|
relatively machine-independent code.
|
|
|
|
small fix to input() in case of multiple reads after EOF.
|
|
|
|
Oct 11, 1989:
|
|
FILENAME is now defined in the BEGIN block -- too many old
|
|
programs broke.
|
|
|
|
"-" means stdin in getline as well as on the commandline.
|
|
|
|
added a bunch of casts to the code to tell the truth about
|
|
char * vs. unsigned char *, a right royal pain. added a
|
|
setlocale call to the front of main, though probably no one
|
|
has it usefully implemented yet.
|
|
|
|
Aug 24, 1989:
|
|
removed redundant relational tests against nullnode if parse
|
|
tree already had a relational at that point.
|
|
|
|
Aug 11, 1989:
|
|
fixed bug: commandline variable assignment has to look like
|
|
var=something. (consider the man page for =, in file =.1)
|
|
|
|
changed number of arguments to functions to static arrays
|
|
to avoid repeated malloc calls.
|
|
|
|
Aug 2, 1989:
|
|
restored -F (space) separator
|
|
|
|
Jul 30, 1989:
|
|
added -v x=1 y=2 ... for immediate commandline variable assignment;
|
|
done before the BEGIN block for sure. they have to precede the
|
|
program if the program is on the commandline.
|
|
Modified Aug 2 to require a separate -v for each assignment.
|
|
|
|
Jul 10, 1989:
|
|
fixed ref-thru-zero bug in environment code in tran.c
|
|
|
|
Jun 23, 1989:
|
|
add newline to usage message.
|
|
|
|
Jun 14, 1989:
|
|
added some missing ansi printf conversion letters: %i %X %E %G.
|
|
no sensible meaning for h or L, so they may not do what one expects.
|
|
|
|
made %* conversions work.
|
|
|
|
changed x^y so that if n is a positive integer, it's done
|
|
by explicit multiplication, thus achieving maximum accuracy.
|
|
(this should be done by pow() but it seems not to be locally.)
|
|
done to x ^= y as well.
|
|
|
|
Jun 4, 1989:
|
|
ENVIRON array contains environment: if shell variable V=thing,
|
|
ENVIRON["V"] is "thing"
|
|
|
|
multiple -f arguments permitted. error reporting is naive.
|
|
(they were permitted before, but only the last was used.)
|
|
|
|
fixed a really stupid botch in the debugging macro dprintf
|
|
|
|
fixed order of evaluation of commandline assignments to match
|
|
what the book claims: an argument of the form x=e is evaluated
|
|
at the time it would have been opened if it were a filename (p 63).
|
|
this invalidates the suggested answer to ex 4-1 (p 195).
|
|
|
|
removed some code that permitted -F (space) fieldseparator,
|
|
since it didn't quite work right anyway. (restored aug 2)
|
|
|
|
Apr 27, 1989:
|
|
Line number now accumulated correctly for comment lines.
|
|
|
|
Apr 26, 1989:
|
|
Debugging output now includes a version date,
|
|
if one compiles it into the source each time.
|
|
|
|
Apr 9, 1989:
|
|
Changed grammar to prohibit constants as 3rd arg of sub and gsub;
|
|
prevents class of overwriting-a-constant errors. (Last one?)
|
|
This invalidates the "banana" example on page 43 of the book.
|
|
|
|
Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal),
|
|
as in ANSI, for strings. Rescinded the sloppiness that permitted
|
|
non-octal digits in \ooo. Warning: not all compilers and libraries
|
|
will be able to deal with \x correctly.
|
|
|
|
Jan 9, 1989:
|
|
Fixed bug that caused tempcell list to contain a duplicate.
|
|
The fix is kludgy.
|
|
|
|
Dec 17, 1988:
|
|
Catches some more commandline errors in main.
|
|
Removed redundant decl of modf in run.c (confuses some compilers).
|
|
Warning: there's no single declaration of malloc, etc., in awk.h
|
|
that seems to satisfy all compilers.
|
|
|
|
Dec 7, 1988:
|
|
Added a bit of code to error printing to avoid printing nulls.
|
|
(Not clear that it actually would.)
|
|
|
|
Nov 27, 1988:
|
|
With fear and trembling, modified the grammar to permit
|
|
multiple pattern-action statements on one line without
|
|
an explicit separator. By definition, this capitulation
|
|
to the ghost of ancient implementations remains undefined
|
|
and thus subject to change without notice or apology.
|
|
DO NOT COUNT ON IT.
|
|
|
|
Oct 30, 1988:
|
|
Fixed bug in call() that failed to recover storage.
|
|
|
|
A warning is now generated if there are more arguments
|
|
in the call than in the definition (in lieu of fixing
|
|
another storage leak).
|
|
|
|
Oct 20, 1988:
|
|
Fixed %c: if expr is numeric, use numeric value;
|
|
otherwise print 1st char of string value. still
|
|
doesn't work if the value is 0 -- won't print \0.
|
|
|
|
Added a few more checks for running out of malloc.
|
|
|
|
Oct 12, 1988:
|
|
Fixed bug in call() that freed local arrays twice.
|
|
|
|
Fixed to handle deletion of non-existent array right;
|
|
complains about attempt to delete non-array element.
|
|
|
|
Sep 30, 1988:
|
|
Now guarantees to evaluate all arguments of built-in
|
|
functions, as in C; the appearance is that arguments
|
|
are evaluated before the function is called. Places
|
|
affected are sub (gsub was ok), substr, printf, and
|
|
all the built-in arithmetic functions in bltin().
|
|
A warning is generated if a bltin() is called with
|
|
the wrong number of arguments.
|
|
|
|
This requires changing makeprof on p167 of the book.
|
|
|
|
Aug 23, 1988:
|
|
setting FILENAME in BEGIN caused core dump, apparently
|
|
because it was freeing space not allocated by malloc.
|
|
|
|
July 24, 1988:
|
|
fixed egregious error in toupper/tolower functions.
|
|
still subject to rescinding, however.
|
|
|
|
July 2, 1988:
|
|
flush stdout before opening file or pipe
|
|
|
|
July 2, 1988:
|
|
performance bug in b.c/cgoto(): not freeing some sets of states.
|
|
partial fix only right now, and the number of states increased
|
|
to make it less obvious.
|
|
|
|
June 1, 1988:
|
|
check error status on close
|
|
|
|
May 28, 1988:
|
|
srand returns seed value it's using.
|
|
see 1/18/90
|
|
|
|
May 22, 1988:
|
|
Removed limit on depth of function calls.
|
|
|
|
May 10, 1988:
|
|
Fixed lib.c to permit _ in commandline variable names.
|
|
|
|
Mar 25, 1988:
|
|
main.c fixed to recognize -- as terminator of command-
|
|
line options. Illegal options flagged.
|
|
Error reporting slightly cleaned up.
|
|
|
|
Dec 2, 1987:
|
|
Newer C compilers apply a strict scope rule to extern
|
|
declarations within functions. Two extern declarations in
|
|
lib.c and tran.c have been moved to obviate this problem.
|
|
|
|
Oct xx, 1987:
|
|
Reluctantly added toupper and tolower functions.
|
|
Subject to rescinding without notice.
|
|
|
|
Sep 17, 1987:
|
|
Error-message printer had printf(s) instead of
|
|
printf("%s",s); got core dumps when the message
|
|
included a %.
|
|
|
|
Sep 12, 1987:
|
|
Very long printf strings caused core dump;
|
|
fixed aprintf, asprintf, format to catch them.
|
|
Can still get a core dump in printf itself.
|
|
|
|
|