1391 lines
48 KiB
Plaintext
1391 lines
48 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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December 8, 2021:
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The error handling in closefile and closeall was mangled. Long
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standing warnings had been made fatal and some fatal errors went
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undetected. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
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Nov 03, 2021:
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getline accesses uninitialized data after getrec()
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returns 0 on EOF and leaves the contents of buf unchanged.
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Thanks to Volodymyr Gubarkov, and Todd C Miller.
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Oct 12, 2021:
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The fix for #83 changed the code to insert 2 chars, but the
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call to adjbuf just above it only allows for 1 char. This can
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cause a heap buffer overflow.
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July 27, 2021:
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As per IEEE Std 1003.1-2008, -F "str" is now consistent with
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-v FS="str" when str is null. Thanks to Warner Losh.
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July 24, 2021:
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Fix readrec's definition of a record. This fixes an issue
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with NetBSD's RS regular expression support that can cause
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an infinite read loop. Thanks to Miguel Pineiro Jr.
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Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
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know if it is reading the first record of a file. This change
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restores a missing line that was overlooked when porting NetBSD's
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RS regex functionality. Thanks to Miguel Pineiro Jr.
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Fix size computation in replace_repeat() for special case
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REPEAT_WITH_Q. Thanks to Todd C. Miller.
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February 15, 2021:
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Small fix so that awk will compile again with g++. Thanks to
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Arnold Robbins.
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January 06, 2021:
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Fix a decision bug with trailing stuff in lib.c:is_valid_number
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after recent changes. Thanks to Ozan Yigit.
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December 18, 2020:
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Fix problems converting inf and NaN values in lib.c:is_valid_number.
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Enhance number to string conversion to do the right thing for
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NaN and inf values. Things are now pretty much the same as in
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gawk. (Found a gawk bug while we're at it.) Added a torture
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test for these values. Thanks to Arnold Robbins. Allows closing
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of PR #101.
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December 15, 2020:
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Merge PR #99, which gets the right header for strcasecmp.
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Thanks to GitHub user michaelforney.
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December 8, 2020:
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Merge PR #98: Disallow hex data. Allow only +nan, -nan,
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+inf, -inf (case independent) to give NaN and infinity values.
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Improve things so that string to double conversion is only
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done once, yielding something of a speedup. This obviate
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PR #95. Thanks to Arnold Robbins.
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December 3, 2020:
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Fix to argument parsing to avoid printing spurious newlines.
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Thanks to Todd Miller. Merges PR #97.
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October 13, 2020:
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Add casts before all the calls to malloc/calloc/realloc in order
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to get it to compile with g++. Thanks to Arnold Robbins.
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August 16, 2020:
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Additional fixes for DJGPP. Thanks to Eli Zaretskii for
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the testing.
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August 7, 2020:
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Merge PR #93, which adds casts to (void*) for debug prints
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using the %p format specifier. Thanks to GitHub user YongHaoWu
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("Chris") for the fixes.
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August 4, 2020:
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In run.c, use non-restartable multibyte routines to attain
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portability to DJGPP. Should fix Issue 92. Thanks to Albert Wik
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for the report and to Todd Miller for the suggested fix.
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July 30, 2020:
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Merge PRs 88-91 which fix small bugs. Thanks to Todd Miller and
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Tim van der Molen for the fixes.
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In order to make life easier, we move exclusively to bison
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as the parser generator.
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July 2, 2020:
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Merge PRs 85 and 86 which fix regressions. Thanks to
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Tim van der Molen for the fixes.
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June 25, 2020:
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Merge PRs 82 and 84. The latter fixes issue #83. Thanks to
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Todd Miller and awkfan77.
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June 12, 2020:
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Clear errno before calling errcheck to avoid any spurious errors
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left over from previous calls that may have set it. Thanks to
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Todd Miller for the fix, from PR #80.
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Fix Issue #78 by allowing \r to follow floating point numbers in
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lib.c:is_number. Thanks to GitHub user ajcarr for the report
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and to Arnold Robbins for the fix.
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June 5, 2020:
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In fldbld(), make sure that inputFS is set before trying to
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use it. Thanks to Steffen Nurpmeso <steffen@sdaoden.eu>
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for the report.
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May 5, 2020:
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Fix checks for compilers that can handle noreturn. Thanks to
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GitHub user enh-google for pointing it out. Closes Issue #79.
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April 16, 2020:
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Handle old compilers that don't support C11 (for noreturn).
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Thanks to Arnold Robbins.
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April 5, 2020:
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Use <stdnoreturn.h> and noreturn instead of GCC attributes.
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Thanks to GitHub user awkfan77. Closes PR #77.
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February 28, 2020:
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More cleanups from Christos Zoulas: notably backslash continuation
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inside strings removes the newline and a fix for RS = "^a".
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Fix for address sanitizer-found problem. Thanks to GitHub user
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enh-google.
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February 19, 2020:
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More small cleanups from Christos Zoulas.
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February 18, 2020:
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Additional cleanups from Christos Zoulas. It's no longer necessary
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to use the -y flag to bison.
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February 6, 2020:
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Additional small cleanups from Christos Zoulas. awk is now
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a little more robust about reporting I/O errors upon exit.
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January 31, 2020:
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Merge PR #70, which avoids use of variable length arrays. Thanks
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to GitHub user michaelforney. Fix issue #60 ({0} in interval
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expressions doesn't work). Also get all tests working again.
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Thanks to Arnold Robbins.
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January 24, 2020:
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A number of small cleanups from Christos Zoulas. Add the close
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on exec flag to files/pipes opened for redirection; courtesy of
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Arnold Robbins.
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January 19, 2020:
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If POSIXLY_CORRECT is set in the environment, then sub and gsub
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use POSIX rules for multiple backslashes. This fixes Issue #66,
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while maintaining backwards compatibility.
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January 9, 2020:
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Input/output errors on closing files are now fatal instead of
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mere warnings. Thanks to Martijn Dekker <martijn@inlv.org>.
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January 5, 2020:
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Fix a bug in the concatentation of two string constants into
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one done in the grammar. Fixes GitHub issue #61. Thanks
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to GitHub user awkfan77 for pointing out the direction for
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the fix. New test T.concat added to the test suite.
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Fix a few memory leaks reported by valgrind, as well.
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December 27, 2019:
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Fix a bug whereby a{0,3} could match four a's. Thanks to
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"Anonymous AWK fan" for the report.
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December 11, 2019:
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Further printf-related fixes for 32 bit systems.
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Thanks again to Christos Zoulas.
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December 8, 2019:
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Fix the return value of sprintf("%d") on 32 bit systems.
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Thanks to Jim Lowe for the report and to Christos Zoulas
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for the fix.
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November 10, 2019:
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Convert a number of Boolean integer variables into
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actual bools. Convert compile_time variable into an
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enum and simplify some of the related code. Thanks
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to Arnold Robbins.
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November 8, 2019:
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Fix from Ori Bernstein to get UTF-8 characters instead of
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bytes when FS = "". This is currently the only bit of
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the One True Awk that understands multibyte characters.
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From Arnold Robbins, apply some cleanups in the test suite.
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October 25, 2019:
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More fixes and cleanups from NetBSD, courtesy of Christos
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Zoulas. Merges PRs 54 and 55.
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October 24, 2019:
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Import second round of code cleanups from NetBSD. Much thanks
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to Christos Zoulas (GitHub user zoulasc). Merges PR 53.
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Add an optimization for string concatenation, also from
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Christos.
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October 17, 2019:
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Import code cleanups from NetBSD. Much thanks to Christos
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Zoulas (GitHub user zoulasc). Merges PR 51.
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October 6, 2019:
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Import code from NetBSD awk that implements RS as a regular
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expression.
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September 10, 2019:
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Fixes for various array / memory overruns found via gcc's
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-fsanitize=unknown. Thanks to Alexander Richardson (GitHub
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user arichardson). Merges PRs 47 and 48.
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July 28, 2019:
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Import grammar optimization from NetBSD: Two string constants
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concatenated together get turned into a single string.
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July 26, 2019:
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Support POSIX-specified C-style escape sequences "\a" (alarm)
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and "\v" (vertical tab) in command line arguments and regular
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expressions, further to the support for them in strings added on
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Apr 9, 1989. These now no longer match as literal "a" and "v"
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characters (as they don't on other awk implementations).
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Thanks to Martijn Dekker.
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July 17, 2019:
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Pull in a number of code cleanups and minor fixes from
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Warner Losh's bsd-ota branch. The only user visible change
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is the use of random(3) as the random number generator.
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Thanks to Warner Losh for collecting all these fixes in
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one easy place to get them from.
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July 16, 2019:
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Fix field splitting to use FS value as of the time a record
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was read or assigned to. Thanks to GitHub user Cody Mello (melloc)
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for the fix. (Merged from his branch, via PR #42.) Updated
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testdir/T.split per said PR as well.
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June 24, 2019:
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Extract awktest.tar into testdir directory. Add some very
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simple mechanics to the makefile for running the tests and
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for cleaning up. No changes to awk itself.
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June 17, 2019:
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Disallow deleting SYMTAB and its elements, which creates
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use-after-free bugs. Thanks to GitHub user Cody Mello (melloc)
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for the fix. (Merged from PR #43.)
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June 5, 2019:
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Allow unmatched right parenthesis in a regular expression to
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be treated literally. Fixes Issue #40. Thanks to GitHub user
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Warner Losh (bsdimp) for the report. Thanks to Arnold Robbins
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for the fix.
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May 29,2019:
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Fix check for command line arguments to no longer require that
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first character after '=' not be another '='. Reverts change of
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August 11, 1989. Thanks to GitHub user Jamie Landeg Jones for
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pointing out the issue; from Issue #38.
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Apr 7, 2019:
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Update awktest.tar(p.50) to use modern options to sort. Needed
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for Android development. Thanks to GitHub user mohd-akram (Mohamed
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Akram). From Issue #33.
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Mar 12, 2019:
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Added very simplistic support for cross-compiling in the
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makefile. We are NOT going to go in the direction of the
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autotools, though. Thanks to GitHub user nee-san for
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the basic change. (Merged from PR #34.)
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Mar 5, 2019:
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Added support for POSIX-standard interval expressions (a.k.a.
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bounds, a.k.a. repetition expressions) in regular expressions,
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backported (via NetBSD) from Apple awk-24 (20070501).
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Thanks to Martijn Dekker <martijn@inlv.org> for the port.
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(Merged from PR #30.)
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Mar 3, 2019:
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Merge PRs as follows:
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#12: Avoid undefined behaviour when using ctype(3) functions in
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relex(). Thanks to GitHub user iamleot.
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#31: Make getline handle numeric strings, and update FIXES. Thanks
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to GitHub user arnoldrobbins.
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#32: maketab: support build systems with read-only source. Thanks
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to GitHub user enh.
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Jan 25, 2019:
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Make getline handle numeric strings properly in all cases.
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(Thanks, Arnold.)
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Jan 21, 2019:
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Merged a number of small fixes from GitHub pull requests.
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Thanks to GitHub users Arnold Robbins (arnoldrobbins),
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Cody Mello (melloc) and Christoph Junghans (junghans).
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PR numbers: 13-21, 23, 24, 27.
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Oct 25, 2018:
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Added test in maketab.c to prevent generating a proctab entry
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for YYSTYPE_IS_DEFINED. It was harmless but some gcc settings
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generated a warning message. Thanks to Nan Xiao for report.
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Aug 27, 2018:
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Disallow '$' in printf formats; arguments evaluated in order
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and printed in order.
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Added some casts to silence warnings on debugging printfs.
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(Thanks, Arnold.)
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Aug 23, 2018:
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A long list of fixes courtesy of Arnold Robbins,
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to whom profound thanks.
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1. ofs-rebuild: OFS value used to rebuild the record was incorrect.
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Fixed August 19, 2014. Revised fix August 2018.
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2. system-status: Instead of a floating-point division by 256, use
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the wait(2) macros to create a reasonable exit status.
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Fixed March 12, 2016.
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3. space: Use provided xisblank() function instead of ispace() for
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matching [[:blank:]].
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4. a-format: Add POSIX standard %a and %A to supported formats. Check
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at runtime that this format is available.
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5. decr-NF: Decrementing NF did not change $0. This is a decades-old
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bug. There are interactions with the old and new value of OFS as well.
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Most of the fix came from the NetBSD awk.
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6. string-conv: String conversions of scalars were sticky. Once a
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conversion to string happened, even with OFMT, that value was used until
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a new numeric value was assigned, even if OFMT differed from CONVFMT,
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and also if CONVFMT changed.
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7. unary-plus: Unary plus on a string constant returned the string.
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Instead, it should convert the value to numeric and give that value.
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Also added Arnold's tests for these to awktest.tar as T.arnold.
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Aug 15, 2018:
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fixed mangled awktest.tar (thanks, Arnold), posted all
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current (very minor) fixes to github / onetrueawk
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Jun 7, 2018:
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(yes, a long layoff)
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Updated some broken tests (beebe.tar, T.lilly)
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[thanks to Arnold Robbins]
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Mar 26, 2015:
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buffer overflow in error reporting; thanks to tobias ulmer
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and john-mark gurney for spotting it and the fix.
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Feb 4, 2013:
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cleaned up a handful of tests that didn't seem to actually
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test for correct behavior: T.latin1, T.gawk.
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Jan 5, 2013:
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added ,NULL initializer to static Cells in run.c; not really
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needed but cleaner. Thanks to Michael Bombardieri.
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Dec 20, 2012:
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fiddled makefile to get correct yacc and bison flags. pick yacc
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(linux) or bison (mac) as necessary.
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added __attribute__((__noreturn__)) to a couple of lines in
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proto.h, to silence someone's enthusiastic checker.
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fixed obscure call by value bug in split(a[1],a) reported on
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9fans. the management of temporary values is just a mess; i
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took a shortcut by making an extra string copy. thanks
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to paul patience and arnold robbins for passing it on and for
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proposed patches.
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tiny fiddle in setfval to eliminate -0 results in T.expr, which
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has irritated me for 20+ years.
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Aug 10, 2011:
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another fix to avoid core dump with delete(ARGV); again, many thanks
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to ruslan ermilov.
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Aug 7, 2011:
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split(s, a, //) now behaves the same as split(s, a, "")
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Jun 12, 2011:
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/pat/, \n /pat/ {...} is now legal, though bad style to use.
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added checks to new -v code that permits -vnospace; thanks to
|
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ruslan ermilov for spotting this and providing the patch.
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removed fixed limit on number of open files; thanks to aleksey
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cheusov and christos zoulos.
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fixed day 1 bug that resurrected deleted elements of ARGV when
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used as filenames (in lib.c).
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minor type fiddles to make gcc -Wall -pedantic happier (but not
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totally so); turned on -fno-strict-aliasing in makefile.
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May 6, 2011:
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added #ifdef for isblank.
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now allows -ffoo as well as -f foo arguments.
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(thanks, ruslan)
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May 1, 2011:
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after advice from todd miller, kevin lo, ruslan ermilov,
|
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and arnold robbins, changed srand() to return the previous
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seed (which is 1 on the first call of srand). the seed is
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an Awkfloat internally though converted to unsigned int to
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pass to the library srand(). thanks, everyone.
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fixed a subtle (and i hope low-probability) overflow error
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in fldbld, by adding space for one extra \0. thanks to
|
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robert bassett for spotting this one and providing a fix.
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removed the files related to compilation on windows. i no
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longer have anything like a current windows environment, so
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i can't test any of it.
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May 23, 2010:
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fixed long-standing overflow bug in run.c; many thanks to
|
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nelson beebe for spotting it and providing the fix.
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fixed bug that didn't parse -vd=1 properly; thanks to santiago
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vila for spotting it.
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Feb 8, 2010:
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i give up. replaced isblank with isspace in b.c; there are
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no consistent header files.
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Nov 26, 2009:
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fixed a long-standing issue with when FS takes effect. a
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change to FS is now noticed immediately for subsequent splits.
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changed the name getline() to awkgetline() to avoid yet another
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name conflict somewhere.
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Feb 11, 2009:
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temporarily for now defined HAS_ISBLANK, since that seems to
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be the best way through the thicket. isblank arrived in C99,
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but seems to be arriving at different systems at different
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times.
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Oct 8, 2008:
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fixed typo in b.c that set tmpvec wrongly. no one had ever
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run into the problem, apparently. thanks to alistair crooks.
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Oct 23, 2007:
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minor fix in lib.c: increase inputFS to 100, change malloc
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for fields to n+1.
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fixed memory fault caused by out of order test in setsval.
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thanks to david o'brien, freebsd, for both fixes.
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May 1, 2007:
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fiddle in makefile to fix for BSD make; thanks to igor sobrado.
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Mar 31, 2007:
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fixed some null pointer refs calling adjbuf.
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Feb 21, 2007:
|
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fixed a bug in matching the null RE in sub and gsub. thanks to al aho
|
|
who actually did the fix (in b.c), and to wolfgang seeberg for finding
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it and providing a very compact test case.
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fixed quotation in b.c; thanks to Hal Pratt and the Princeton Dante
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|
Project.
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removed some no-effect asserts in run.c.
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fiddled maketab.c to not complain about bison-generated values.
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removed the obsolete -V argument; fixed --version to print the
|
|
version and exit.
|
|
|
|
fixed wording and an outright error in the usage message; thanks to igor
|
|
sobrado and jason mcintyre.
|
|
|
|
fixed a bug in -d that caused core dump if no program followed.
|
|
|
|
Jan 1, 2007:
|
|
dropped mac.code from makefile; there are few non-MacOSX
|
|
mac's these days.
|
|
|
|
Jan 17, 2006:
|
|
system() not flagged as unsafe in the unadvertised -safe option.
|
|
found it while enhancing tests before shipping the ;login: article.
|
|
practice what you preach.
|
|
|
|
removed the 9-years-obsolete -mr and -mf flags.
|
|
|
|
added -version and --version options.
|
|
|
|
core dump on linux with BEGIN {nextfile}, now fixed.
|
|
|
|
removed some #ifdef's in run.c and lex.c that appear to no
|
|
longer be necessary.
|
|
|
|
Apr 24, 2005:
|
|
modified lib.c so that values of $0 et al are preserved in the END
|
|
block, apparently as required by posix. thanks to havard eidnes
|
|
for the report and code.
|
|
|
|
Jan 14, 2005:
|
|
fixed infinite loop in parsing, originally found by brian tsang.
|
|
thanks to arnold robbins for a suggestion that started me
|
|
rethinking it.
|
|
|
|
Dec 31, 2004:
|
|
prevent overflow of -f array in main, head off potential error in
|
|
call of SYNTAX(), test malloc return in lib.c, all with thanks to
|
|
todd miller.
|
|
|
|
Dec 22, 2004:
|
|
cranked up size of NCHARS; coverity thinks it can be overrun with
|
|
smaller size, and i think that's right. added some assertions to b.c
|
|
to catch places where it might overrun. the RE code is still fragile.
|
|
|
|
Dec 5, 2004:
|
|
fixed a couple of overflow problems with ridiculous field numbers:
|
|
e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas
|
|
and david o'brien at freebsd.org for patches. this really should
|
|
be re-done from scratch.
|
|
|
|
Nov 21, 2004:
|
|
fixed another 25-year-old RE bug, in split. it's another failure
|
|
to (re-)initialize. thanks to steve fisher for spotting this and
|
|
providing a good test case.
|
|
|
|
Nov 22, 2003:
|
|
fixed a bug in regular expressions that dates (so help me) from 1977;
|
|
it's been there from the beginning. an anchored longest match that
|
|
was longer than the number of states triggered a failure to initialize
|
|
the machine properly. many thanks to moinak ghosh for not only finding
|
|
this one but for providing a fix, in some of the most mysterious
|
|
code known to man.
|
|
|
|
fixed a storage leak in call() that appears to have been there since
|
|
1983 or so -- a function without an explicit return that assigns a
|
|
string to a parameter leaked a Cell. thanks to moinak ghosh for
|
|
spotting this very subtle one.
|
|
|
|
Jul 31, 2003:
|
|
fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
|
|
that mis-handled the character 255 in input. (it was being compared
|
|
to EOF with a signed comparison.)
|
|
|
|
Jul 29, 2003:
|
|
fixed (i think) the long-standing botch that included the beginning of
|
|
line state ^ for RE's in the set of valid characters; this led to a
|
|
variety of odd problems, including failure to properly match certain
|
|
regular expressions in non-US locales. thanks to ruslan for keeping
|
|
at this one.
|
|
|
|
Jul 28, 2003:
|
|
n-th try at getting internationalization right, with thanks to volker
|
|
kiefel, arnold robbins and ruslan ermilov for advice, though they
|
|
should not be blamed for the outcome. according to posix, "." is the
|
|
radix character in programs and command line arguments regardless of
|
|
the locale; otherwise, the locale should prevail for input and output
|
|
of numbers. so it's intended to work that way.
|
|
|
|
i have rescinded the attempt to use strcoll in expanding shorthands in
|
|
regular expressions (cclenter). its properties are much too
|
|
surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
|
|
in locale fr_CA. i can see how this might arise by implementation
|
|
but i cannot explain it to a human user. (this behavior can be seen
|
|
in gawk as well; we're leaning on the same library.)
|
|
|
|
the issue appears to be that strcoll is meant for sorting, where
|
|
merging upper and lower case may make sense (though note that unix
|
|
sort does not do this by default either). it is not appropriate
|
|
for regular expressions, where the goal is to match specific
|
|
patterns of characters. in any case, the notations [:lower:], etc.,
|
|
are available in awk, and they are more likely to work correctly in
|
|
most locales.
|
|
|
|
a moratorium is hereby declared on internationalization changes.
|
|
i apologize to friends and colleagues in other parts of the world.
|
|
i would truly like to get this "right", but i don't know what
|
|
that is, and i do not want to keep making changes until it's clear.
|
|
|
|
Jul 4, 2003:
|
|
fixed bug that permitted non-terminated RE, as in "awk /x".
|
|
|
|
Jun 1, 2003:
|
|
subtle change to split: if source is empty, number of elems
|
|
is always 0 and the array is not set.
|
|
|
|
Mar 21, 2003:
|
|
added some parens to isblank, in another attempt to make things
|
|
internationally portable.
|
|
|
|
Mar 14, 2003:
|
|
the internationalization changes, somewhat modified, are now
|
|
reinstated. in theory awk will now do character comparisons
|
|
and case conversions in national language, but "." will always
|
|
be the decimal point separator on input and output regardless
|
|
of national language. isblank(){} has an #ifndef.
|
|
|
|
this no longer compiles on windows: LC_MESSAGES isn't defined
|
|
in vc6++.
|
|
|
|
fixed subtle behavior in field and record splitting: if FS is
|
|
a single character and RS is not empty, \n is NOT a separator.
|
|
this tortuous reading is found in the awk book; behavior now
|
|
matches gawk and mawk.
|
|
|
|
Dec 13, 2002:
|
|
for the moment, the internationalization changes of nov 29 are
|
|
rolled back -- programs like x = 1.2 don't work in some locales,
|
|
because the parser is expecting x = 1,2. until i understand this
|
|
better, this will have to wait.
|
|
|
|
Nov 29, 2002:
|
|
modified b.c (with tiny changes in main and run) to support
|
|
locales, using strcoll and iswhatever tests for posix character
|
|
classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
|
|
the function isblank doesn't seem to have propagated to any
|
|
header file near me, so it's there explicitly. not properly
|
|
tested on non-ascii character sets by me.
|
|
|
|
Jun 28, 2002:
|
|
modified run/format() and tran/getsval() to do a slightly better
|
|
job on using OFMT for output from print and CONVFMT for other
|
|
number->string conversions, as promised by posix and done by
|
|
gawk and mawk. there are still places where it doesn't work
|
|
right if CONVFMT is changed; by then the STR attribute of the
|
|
variable has been irrevocably set. thanks to arnold robbins for
|
|
code and examples.
|
|
|
|
fixed subtle bug in format that could get core dump. thanks to
|
|
Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
|
|
minor cleanup in run.c / format() at the same time.
|
|
|
|
added some tests for null pointers to debugging printf's, which
|
|
were never intended for external consumption. thanks to dave
|
|
kerns (dkerns@lucent.com) for pointing this out.
|
|
|
|
GNU compatibility: an empty regexp matches anything (thanks to
|
|
dag-erling smorgrav, des@ofug.org). subject to reversion if
|
|
this does more harm than good.
|
|
|
|
pervasive small changes to make things more const-correct, as
|
|
reported by gcc's -Wwrite-strings. as it says in the gcc manual,
|
|
this may be more nuisance than useful. provoked by a suggestion
|
|
and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
|
|
|
|
minor documentation changes to note that this now compiles out
|
|
of the box on Mac OS X.
|
|
|
|
Feb 10, 2002:
|
|
changed types in posix chars structure to quiet solaris cc.
|
|
|
|
Jan 1, 2002:
|
|
fflush() or fflush("") flushes all files and pipes.
|
|
|
|
length(arrayname) returns number of elements; thanks to
|
|
arnold robbins for suggestion.
|
|
|
|
added a makefile.win to make it easier to build on windows.
|
|
based on dan allen's buildwin.bat.
|
|
|
|
Nov 16, 2001:
|
|
added support for posix character class names like [:digit:],
|
|
which are not exactly shorter than [0-9] and perhaps no more
|
|
portable. thanks to dag-erling smorgrav for code.
|
|
|
|
Feb 16, 2001:
|
|
removed -m option; no longer needed, and it was actually
|
|
broken (noted thanks to volker kiefel).
|
|
|
|
Feb 10, 2001:
|
|
fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
|
|
and period was accepted as a valid number if it started with a period.
|
|
this would never have happened with the lex version.
|
|
|
|
other 1-character botches, now fixed, include a bare $ and a
|
|
bare " at the end of the input.
|
|
|
|
Feb 7, 2001:
|
|
more (const char *) casts in b.c and tran.c to silence warnings.
|
|
|
|
Nov 15, 2000:
|
|
fixed a bug introduced in august 1997 that caused expressions
|
|
like $f[1] to be syntax errors. thanks to arnold robbins for
|
|
noticing this and providing a fix.
|
|
|
|
Oct 30, 2000:
|
|
fixed some nextfile bugs: not handling all cases. thanks to
|
|
arnold robbins for pointing this out. new regressions added.
|
|
|
|
close() is now a function. it returns whatever the library
|
|
fclose returns, and -1 for closing a file or pipe that wasn't
|
|
opened.
|
|
|
|
Sep 24, 2000:
|
|
permit \n explicitly in character classes; won't work right
|
|
if comes in as "[\n]" but ok as /[\n]/, because of multiple
|
|
processing of \'s. thanks to arnold robbins.
|
|
|
|
July 5, 2000:
|
|
minor fiddles in tran.c to keep compilers happy about uschar.
|
|
thanks to norman wilson.
|
|
|
|
May 25, 2000:
|
|
yet another attempt at making 8-bit input work, with another
|
|
band-aid in b.c (member()), and some (uschar) casts to head
|
|
off potential errors in subscripts (like isdigit). also
|
|
changed HAT to NCHARS-2. thanks again to santiago vila.
|
|
|
|
changed maketab.c to ignore apparently out of range definitions
|
|
instead of halting; new freeBSD generates one. thanks to
|
|
jon snader <jsnader@ix.netcom.com> for pointing out the problem.
|
|
|
|
May 2, 2000:
|
|
fixed an 8-bit problem in b.c by making several char*'s into
|
|
unsigned char*'s. not clear i have them all yet. thanks to
|
|
Santiago Vila <sanvila@unex.es> for the bug report.
|
|
|
|
Apr 21, 2000:
|
|
finally found and fixed a memory leak in function call; it's
|
|
been there since functions were added ~1983. thanks to
|
|
jon bentley for the test case that found it.
|
|
|
|
added test in envinit to catch environment "variables" with
|
|
names beginning with '='; thanks to Berend Hasselman.
|
|
|
|
Jul 28, 1999:
|
|
added test in defn() to catch function foo(foo), which
|
|
otherwise recurses until core dump. thanks to arnold
|
|
robbins for noticing this.
|
|
|
|
Jun 20, 1999:
|
|
added *bp in gettok in lex.c; appears possible to exit function
|
|
without terminating the string. thanks to russ cox.
|
|
|
|
Jun 2, 1999:
|
|
added function stdinit() to run to initialize files[] array,
|
|
in case stdin, etc., are not constants; some compilers care.
|
|
|
|
May 10, 1999:
|
|
replaced the ERROR ... FATAL, etc., macros with functions
|
|
based on vprintf, to avoid problems caused by overrunning
|
|
fixed-size errbuf array. thanks to ralph corderoy for the
|
|
impetus, and for pointing out a string termination bug in
|
|
qstring as well.
|
|
|
|
Apr 21, 1999:
|
|
fixed bug that caused occasional core dumps with commandline
|
|
variable with value ending in \. (thanks to nelson beebe for
|
|
the test case.)
|
|
|
|
Apr 16, 1999:
|
|
with code kindly provided by Bruce Lilly, awk now parses
|
|
/=/ and similar constructs more sensibly in more places.
|
|
Bruce also provided some helpful test cases.
|
|
|
|
Apr 5, 1999:
|
|
changed true/false to True/False in run.c to make it
|
|
easier to compile with C++. Added some casts on malloc
|
|
and realloc to be honest about casts; ditto. changed
|
|
ltype int to long in struct rrow to reduce some 64-bit
|
|
complaints; other changes scattered throughout for the
|
|
same purpose. thanks to Nelson Beebe for these portability
|
|
improvements.
|
|
|
|
removed some horrible pointer-int casting in b.c and elsewhere
|
|
by adding ptoi and itonp to localize the casts, which are
|
|
all benign. fixed one incipient bug that showed up on sgi
|
|
in 64-bit mode.
|
|
|
|
reset lineno for new source file; include filename in error
|
|
message. also fixed line number error in continuation lines.
|
|
(thanks to Nelson Beebe for both of these.)
|
|
|
|
Mar 24, 1999:
|
|
Nelson Beebe notes that irix 5.3 yacc dies with a bogus
|
|
error; use a newer version or switch to bison, since sgi
|
|
is unlikely to fix it.
|
|
|
|
Mar 5, 1999:
|
|
changed isnumber to is_number to avoid the problem caused by
|
|
versions of ctype.h that include the name isnumber.
|
|
|
|
distribution now includes a script for building on a Mac,
|
|
thanks to Dan Allen.
|
|
|
|
Feb 20, 1999:
|
|
fixed memory leaks in run.c (call) and tran.c (setfval).
|
|
thanks to Stephen Nutt for finding these and providing the fixes.
|
|
|
|
Jan 13, 1999:
|
|
replaced srand argument by (unsigned int) in run.c;
|
|
avoids problem on Mac and potentially on Unix & Windows.
|
|
thanks to Dan Allen.
|
|
|
|
added a few (int) casts to silence useless compiler warnings.
|
|
e.g., errorflag= in run.c jump().
|
|
|
|
added proctab.c to the bundle outout; one less thing
|
|
to have to compile out of the box.
|
|
|
|
added calls to _popen and _pclose to the win95 stub for
|
|
pipes (thanks to Steve Adams for this helpful suggestion).
|
|
seems to work, though properties are not well understood
|
|
by me, and it appears that under some circumstances the
|
|
pipe output is truncated. Be careful.
|
|
|
|
Oct 19, 1998:
|
|
fixed a couple of bugs in getrec: could fail to update $0
|
|
after a getline var; because inputFS wasn't initialized,
|
|
could split $0 on every character, a misleading diversion.
|
|
|
|
fixed caching bug in makedfa: LRU was actually removing
|
|
least often used.
|
|
|
|
thanks to ross ridge for finding these, and for providing
|
|
great bug reports.
|
|
|
|
May 12, 1998:
|
|
fixed potential bug in readrec: might fail to update record
|
|
pointer after growing. thanks to dan levy for spotting this
|
|
and suggesting the fix.
|
|
|
|
Mar 12, 1998:
|
|
added -V to print version number and die.
|
|
|
|
[notify dave kerns, dkerns@dacsoup.ih.lucent.com]
|
|
|
|
Feb 11, 1998:
|
|
subtle silent bug in lex.c: if the program ended with a number
|
|
longer than 1 digit, part of the input would be pushed back and
|
|
parsed again because token buffer wasn't terminated right.
|
|
example: awk 'length($0) > 10'. blush. at least i found it
|
|
myself.
|
|
|
|
Aug 31, 1997:
|
|
s/adelete/awkdelete/: SGI uses this in malloc.h.
|
|
thanks to nelson beebe for pointing this one out.
|
|
|
|
Aug 21, 1997:
|
|
fixed some bugs in sub and gsub when replacement includes \\.
|
|
this is a dark, horrible corner, but at least now i believe that
|
|
the behavior is the same as gawk and the intended posix standard.
|
|
thanks to arnold robbins for advice here.
|
|
|
|
Aug 9, 1997:
|
|
somewhat regretfully, replaced the ancient lex-based lexical
|
|
analyzer with one written in C. it's longer, generates less code,
|
|
and more portable; the old one depended too much on mysterious
|
|
properties of lex that were not preserved in other environments.
|
|
in theory these recognize the same language.
|
|
|
|
now using strtod to test whether a string is a number, instead of
|
|
the convoluted original function. should be more portable and
|
|
reliable if strtod is implemented right.
|
|
|
|
removed now-pointless optimization in makefile that tries to avoid
|
|
recompilation when awkgram.y is changed but symbols are not.
|
|
|
|
removed most fixed-size arrays, though a handful remain, some
|
|
of which are unchecked. you have been warned.
|
|
|
|
Aug 4, 1997:
|
|
with some trepidation, replaced the ancient code that managed
|
|
fields and $0 in fixed-size arrays with arrays that grow on
|
|
demand. there is still some tension between trying to make this
|
|
run fast and making it clean; not sure it's right yet.
|
|
|
|
the ill-conceived -mr and -mf arguments are now useful only
|
|
for debugging. previous dynamic string code removed.
|
|
|
|
numerous other minor cleanups along the way.
|
|
|
|
Jul 30, 1997:
|
|
using code provided by dan levy (to whom profuse thanks), replaced
|
|
fixed-size arrays and awkward kludges by a fairly uniform mechanism
|
|
to grow arrays as needed for printf, sub, gsub, etc.
|
|
|
|
Jul 23, 1997:
|
|
falling off the end of a function returns "" and 0, not 0.
|
|
thanks to arnold robbins.
|
|
|
|
Jun 17, 1997:
|
|
replaced several fixed-size arrays by dynamically-created ones
|
|
in run.c; added overflow tests to some previously unchecked cases.
|
|
getline, toupper, tolower.
|
|
|
|
getline code is still broken in that recursive calls may wind
|
|
up using the same space. [fixed later]
|
|
|
|
increased RECSIZE to 8192 to push problems further over the horizon.
|
|
|
|
added \r to \n as input line separator for programs, not data.
|
|
damn CRLFs.
|
|
|
|
modified format() to permit explicit printf("%c", 0) to include
|
|
a null byte in output. thanks to ken stailey for the fix.
|
|
|
|
added a "-safe" argument that disables file output (print >,
|
|
print >>), process creation (cmd|getline, print |, system), and
|
|
access to the environment (ENVIRON). this is a first approximation
|
|
to a "safe" version of awk, but don't rely on it too much. thanks
|
|
to joan feigenbaum and matt blaze for the inspiration long ago.
|
|
|
|
Jul 8, 1996:
|
|
fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
|
|
ralph corderoy.
|
|
|
|
Jun 29, 1996:
|
|
fixed awful bug in new field splitting; didn't get all the places
|
|
where input was done.
|
|
|
|
Jun 28, 1996:
|
|
changed field-splitting to conform to posix definition: fields are
|
|
split using the value of FS at the time of input; it used to be
|
|
the value when the field or NF was first referred to, a much less
|
|
predictable definition. thanks to arnold robbins for encouragement
|
|
to do the right thing.
|
|
|
|
May 28, 1996:
|
|
fixed appalling but apparently unimportant bug in parsing octal
|
|
numbers in reg exprs.
|
|
|
|
explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
|
|
|
|
May 27, 1996:
|
|
cleaned up some declarations so gcc -Wall is now almost silent.
|
|
|
|
makefile now includes backup copies of ytab.c and lexyy.c in case
|
|
one makes before looking; it also avoids recreating lexyy.c unless
|
|
really needed.
|
|
|
|
s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
|
|
with unwisely-written header files.
|
|
|
|
thanks to jeffrey friedl for several of these.
|
|
|
|
May 26, 1996:
|
|
an attempt to rationalize the (unsigned) char issue. almost all
|
|
instances of unsigned char have been removed; the handful of places
|
|
in b.c where chars are used as table indices have been hand-crafted.
|
|
added some latin-1 tests to the regression, but i'm not confident;
|
|
none of my compilers seem to care much. thanks to nelson beebe for
|
|
pointing out some others that do care.
|
|
|
|
May 2, 1996:
|
|
removed all register declarations.
|
|
|
|
enhanced split(), as in gawk, etc: split(s, a, "") splits s into
|
|
a[1]...a[length(s)] with each character a single element.
|
|
|
|
made the same changes for field-splitting if FS is "".
|
|
|
|
added nextfile, as in gawk: causes immediate advance to next
|
|
input file. (thanks to arnold robbins for inspiration and code).
|
|
|
|
small fixes to regexpr code: can now handle []], [[], and
|
|
variants; [] is now a syntax error, rather than matching
|
|
everything; [z-a] is now empty, not z. far from complete
|
|
or correct, however. (thanks to jeffrey friedl for pointing out
|
|
some awful behaviors.)
|
|
|
|
Apr 29, 1996:
|
|
replaced uchar by uschar everywhere; apparently some compilers
|
|
usurp this name and this causes conflicts.
|
|
|
|
fixed call to time in run.c (bltin); arg is time_t *.
|
|
|
|
replaced horrible pointer/long punning in b.c by a legitimate
|
|
union. should be safer on 64-bit machines and cleaner everywhere.
|
|
(thanks to nelson beebe for pointing out some of these problems.)
|
|
|
|
replaced nested comments by #if 0...#endif in run.c, lib.c.
|
|
|
|
removed getsval, setsval, execute macros from run.c and lib.c.
|
|
machines are 100x faster than they were when these macros were
|
|
first used.
|
|
|
|
revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
|
|
y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
|
|
portability to nameless systems.
|
|
|
|
"make bundle" now includes yacc and lex output files for recipients
|
|
who don't have yacc or lex.
|
|
|
|
Aug 15, 1995:
|
|
initialized Cells in setsymtab more carefully; some fields
|
|
were not set. (thanks to purify, all of whose complaints i
|
|
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.
|
|
|
|
|