Annotation of src/usr.bin/awk/FIXES, Revision 1.46
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1.1 tholo 23: ****************************************************************/
24:
25: This file lists all bug fixes, changes, etc., made since the AWK book
26: was sent to the printers in August, 1987.
1.45 millert 27:
1.46 ! millert 28:
! 29: May 23, 2022:
! 30: Memory leak when assigning a string to some of the built-in
! 31: variables. allocated string erroneously marked DONTFREE.
! 32: Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
! 33:
1.45 millert 34: Mar 14, 2022:
1.46 ! millert 35: Historic bug: command-line "name=value" assignment had been
! 36: truncating its entry in ARGV. (circa 1989) Thanks to
! 37: Miguel Pineiro Jr. <mpj@pineiro.cc>.
1.44 millert 38:
39: Mar 3, 2022:
40: Fixed file management memory leak that appears to have been
41: there since the files array was first initialized with stdin,
42: stdout, and stderr (circa 1992). Thanks to Miguel Pineiro Jr.
43: <mpj@pineiro.cc>.
1.43 millert 44:
45: December 8, 2021:
46: The error handling in closefile and closeall was mangled. Long
47: standing warnings had been made fatal and some fatal errors went
48: undetected. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
1.42 millert 49:
50: Nov 03, 2021:
51: getline accesses uninitialized data after getrec()
52: returns 0 on EOF and leaves the contents of buf unchanged.
53: Thanks to Volodymyr Gubarkov, and Todd C Miller.
1.41 millert 54:
55: Oct 12, 2021:
56: The fix for #83 changed the code to insert 2 chars, but the
57: call to adjbuf just above it only allows for 1 char. This can
58: cause a heap buffer overflow.
59:
60: July 27, 2021:
61: As per IEEE Std 1003.1-2008, -F "str" is now consistent with
62: -v FS="str" when str is null. Thanks to Warner Losh.
63:
64: July 24, 2021:
65: Fix readrec's definition of a record. This fixes an issue
66: with NetBSD's RS regular expression support that can cause
67: an infinite read loop. Thanks to Miguel Pineiro Jr.
68:
69: Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
70: know if it is reading the first record of a file. This change
71: restores a missing line that was overlooked when porting NetBSD's
72: RS regex functionality. Thanks to Miguel Pineiro Jr.
73:
74: Fix size computation in replace_repeat() for special case
75: REPEAT_WITH_Q. Thanks to Todd C. Miller.
76:
77: February 15, 2021:
78: Small fix so that awk will compile again with g++. Thanks to
79: Arnold Robbins.
80:
81: January 06, 2021:
82: Fix a decision bug with trailing stuff in lib.c:is_valid_number
83: after recent changes. Thanks to Ozan Yigit.
1.40 millert 84:
85: December 18, 2020:
86: Fix problems converting inf and NaN values in lib.c:is_valid_number.
87: Enhance number to string conversion to do the right thing for
88: NaN and inf values. Things are now pretty much the same as in
89: gawk. (Found a gawk bug while we're at it.) Added a torture
90: test for these values. Thanks to Arnold Robbins. Allows closing
91: of PR #101.
92:
93: December 15, 2020:
94: Merge PR #99, which gets the right header for strcasecmp.
95: Thanks to GitHub user michaelforney.
1.39 millert 96:
97: December 8, 2020:
98: Merge PR #98: Disallow hex data. Allow only +nan, -nan,
99: +inf, -inf (case independent) to give NaN and infinity values.
100: Improve things so that string to double conversion is only
101: done once, yielding something of a speedup. This obviate
102: PR #95. Thanks to Arnold Robbins.
103:
104: December 3, 2020:
105: Fix to argument parsing to avoid printing spurious newlines.
106: Thanks to Todd Miller. Merges PR #97.
107:
108: October 13, 2020:
109: Add casts before all the calls to malloc/calloc/realloc in order
110: to get it to compile with g++. Thanks to Arnold Robbins.
111:
112: August 16, 2020:
113: Additional fixes for DJGPP. Thanks to Eli Zaretskii for
114: the testing.
1.38 millert 115:
116: August 7, 2020:
117: Merge PR #93, which adds casts to (void*) for debug prints
118: using the %p format specifier. Thanks to GitHub user YongHaoWu
119: ("Chris") for the fixes.
120:
121: August 4, 2020:
122: In run.c, use non-restartable multibyte routines to attain
123: portability to DJGPP. Should fix Issue 92. Thanks to Albert Wik
124: for the report and to Todd Miller for the suggested fix.
1.37 millert 125:
126: July 30, 2020:
127: Merge PRs 88-91 which fix small bugs. Thanks to Todd Miller and
128: Tim van der Molen for the fixes.
129:
130: In order to make life easier, we move exclusively to bison
131: as the parser generator.
1.36 millert 132:
133: July 2, 2020:
134: Merge PRs 85 and 86 which fix regressions. Thanks to
135: Tim van der Molen for the fixes.
1.35 millert 136:
137: June 25, 2020:
138: Merge PRs 82 and 84. The latter fixes issue #83. Thanks to
139: Todd Miller and awkfan77.
1.34 millert 140:
141: June 12, 2020:
142: Clear errno before calling errcheck to avoid any spurious errors
143: left over from previous calls that may have set it. Thanks to
144: Todd Miller for the fix, from PR #80.
145:
146: Fix Issue #78 by allowing \r to follow floating point numbers in
147: lib.c:is_number. Thanks to GitHub user ajcarr for the report
148: and to Arnold Robbins for the fix.
1.33 millert 149:
150: June 5, 2020:
151: In fldbld(), make sure that inputFS is set before trying to
152: use it. Thanks to Steffen Nurpmeso <steffen@sdaoden.eu>
153: for the report.
154:
155: May 5, 2020:
156: Fix checks for compilers that can handle noreturn. Thanks to
157: GitHub user enh-google for pointing it out. Closes Issue #79.
158:
159: April 16, 2020:
160: Handle old compilers that don't support C11 (for noreturn).
161: Thanks to Arnold Robbins.
162:
163: April 5, 2020:
164: Use <stdnoreturn.h> and noreturn instead of GCC attributes.
165: Thanks to GitHub user awkfan77. Closes PR #77.
1.30 millert 166:
1.32 millert 167: February 28, 2020:
168: More cleanups from Christos Zoulas: notably backslash continuation
169: inside strings removes the newline and a fix for RS = "^a".
170: Fix for address sanitizer-found problem. Thanks to GitHub user
171: enh-google.
172:
173: February 19, 2020:
174: More small cleanups from Christos Zoulas.
175:
176: February 18, 2020:
177: Additional cleanups from Christos Zoulas. It's no longer necessary
178: to use the -y flag to bison.
179:
180: February 6, 2020:
181: Additional small cleanups from Christos Zoulas. awk is now
182: a little more robust about reporting I/O errors upon exit.
183:
1.31 millert 184: January 31, 2020:
185: Merge PR #70, which avoids use of variable length arrays. Thanks
186: to GitHub user michaelforney. Fix issue #60 ({0} in interval
1.32 millert 187: expressions doesn't work). Also get all tests working again.
188: Thanks to Arnold Robbins.
1.31 millert 189:
190: January 24, 2020:
191: A number of small cleanups from Christos Zoulas. Add the close
192: on exec flag to files/pipes opened for redirection; courtesy of
193: Arnold Robbins.
194:
195: January 19, 2020:
196: If POSIXLY_CORRECT is set in the environment, then sub and gsub
197: use POSIX rules for multiple backslashes. This fixes Issue #66,
198: while maintaining backwards compatibility.
199:
200: January 9, 2020:
201: Input/output errors on closing files are now fatal instead of
202: mere warnings. Thanks to Martijn Dekker <martijn@inlv.org>.
203:
1.30 millert 204: January 5, 2020:
205: Fix a bug in the concatentation of two string constants into
206: one done in the grammar. Fixes GitHub issue #61. Thanks
207: to GitHub user awkfan77 for pointing out the direction for
208: the fix. New test T.concat added to the test suite.
209: Fix a few memory leaks reported by valgrind, as well.
210:
211: December 27, 2019:
212: Fix a bug whereby a{0,3} could match four a's. Thanks to
213: "Anonymous AWK fan" for the report.
214:
215: December 11, 2019:
216: Further printf-related fixes for 32 bit systems.
217: Thanks again to Christos Zoulas.
218:
219: December 8, 2019:
220: Fix the return value of sprintf("%d") on 32 bit systems.
221: Thanks to Jim Lowe for the report and to Christos Zoulas
222: for the fix.
1.29 millert 223:
224: November 10, 2019:
225: Convert a number of Boolean integer variables into
226: actual bools. Convert compile_time variable into an
227: enum and simplify some of the related code. Thanks
228: to Arnold Robbins.
229:
230: November 8, 2019:
231: Fix from Ori Bernstein to get UTF-8 characters instead of
232: bytes when FS = "". This is currently the only bit of
233: the One True Awk that understands multibyte characters.
234: From Arnold Robbins, apply some cleanups in the test suite.
1.28 millert 235:
236: October 25, 2019:
237: More fixes and cleanups from NetBSD, courtesy of Christos
238: Zoulas. Merges PRs 54 and 55.
239:
240: October 24, 2019:
241: Import second round of code cleanups from NetBSD. Much thanks
1.31 millert 242: to Christos Zoulas (GitHub user zoulasc). Merges PR 53.
1.28 millert 243: Add an optimization for string concatenation, also from
244: Christos.
1.27 millert 245:
246: October 17, 2019:
247: Import code cleanups from NetBSD. Much thanks to Christos
1.31 millert 248: Zoulas (GitHub user zoulasc). Merges PR 51.
1.26 millert 249:
250: October 6, 2019:
251: Import code from NetBSD awk that implements RS as a regular
252: expression.
1.23 millert 253:
1.25 millert 254: September 10, 2019:
255: Fixes for various array / memory overruns found via gcc's
1.31 millert 256: -fsanitize=unknown. Thanks to Alexander Richardson (GitHub
1.25 millert 257: user arichardson). Merges PRs 47 and 48.
258:
259: July 28, 2019:
260: Import grammar optimization from NetBSD: Two string constants
261: concatenated together get turned into a single string.
262:
263: July 26, 2019:
264: Support POSIX-specified C-style escape sequences "\a" (alarm)
265: and "\v" (vertical tab) in command line arguments and regular
266: expressions, further to the support for them in strings added on
267: Apr 9, 1989. These now no longer match as literal "a" and "v"
268: characters (as they don't on other awk implementations).
269: Thanks to Martijn Dekker.
270:
271: July 17, 2019:
272: Pull in a number of code cleanups and minor fixes from
273: Warner Losh's bsd-ota branch. The only user visible change
274: is the use of random(3) as the random number generator.
275: Thanks to Warner Losh for collecting all these fixes in
276: one easy place to get them from.
277:
278: July 16, 2019:
279: Fix field splitting to use FS value as of the time a record
280: was read or assigned to. Thanks to GitHub user Cody Mello (melloc)
281: for the fix. (Merged from his branch, via PR #42.) Updated
282: testdir/T.split per said PR as well.
283:
284: June 24, 2019:
285: Extract awktest.tar into testdir directory. Add some very
286: simple mechanics to the makefile for running the tests and
287: for cleaning up. No changes to awk itself.
288:
1.24 millert 289: June 17, 2019:
290: Disallow deleting SYMTAB and its elements, which creates
291: use-after-free bugs. Thanks to GitHub user Cody Mello (melloc)
292: for the fix. (Merged from PR #43.)
293:
294: June 5, 2019:
295: Allow unmatched right parenthesis in a regular expression to
296: be treated literally. Fixes Issue #40. Thanks to GitHub user
297: Warner Losh (bsdimp) for the report. Thanks to Arnold Robbins
298: for the fix.
299:
300: May 29,2019:
301: Fix check for command line arguments to no longer require that
302: first character after '=' not be another '='. Reverts change of
303: August 11, 1989. Thanks to GitHub user Jamie Landeg Jones for
304: pointing out the issue; from Issue #38.
305:
306: Apr 7, 2019:
307: Update awktest.tar(p.50) to use modern options to sort. Needed
308: for Android development. Thanks to GitHub user mohd-akram (Mohamed
309: Akram). From Issue #33.
310:
311: Mar 12, 2019:
312: Added very simplistic support for cross-compiling in the
313: makefile. We are NOT going to go in the direction of the
314: autotools, though. Thanks to GitHub user nee-san for
315: the basic change. (Merged from PR #34.)
316:
1.23 millert 317: Mar 5, 2019:
318: Added support for POSIX-standard interval expressions (a.k.a.
319: bounds, a.k.a. repetition expressions) in regular expressions,
320: backported (via NetBSD) from Apple awk-24 (20070501).
321: Thanks to Martijn Dekker <martijn@inlv.org> for the port.
322: (Merged from PR #30.)
323:
324: Mar 3, 2019:
325: Merge PRs as follows:
326: #12: Avoid undefined behaviour when using ctype(3) functions in
327: relex(). Thanks to GitHub user iamleot.
328: #31: Make getline handle numeric strings, and update FIXES. Thanks
1.24 millert 329: to GitHub user arnoldrobbins.
1.23 millert 330: #32: maketab: support build systems with read-only source. Thanks
331: to GitHub user enh.
1.22 millert 332:
333: Jan 25, 2019:
334: Make getline handle numeric strings properly in all cases.
335: (Thanks, Arnold.)
336:
337: Jan 21, 2019:
338: Merged a number of small fixes from GitHub pull requests.
339: Thanks to GitHub users Arnold Robbins (arnoldrobbins),
340: Cody Mello (melloc) and Christoph Junghans (junghans).
341: PR numbers: 13-21, 23, 24, 27.
1.21 millert 342:
343: Oct 25, 2018:
344: Added test in maketab.c to prevent generating a proctab entry
345: for YYSTYPE_IS_DEFINED. It was harmless but some gcc settings
346: generated a warning message. Thanks to Nan Xiao for report.
1.20 millert 347:
348: Aug 27, 2018:
349: Disallow '$' in printf formats; arguments evaluated in order
350: and printed in order.
351:
352: Added some casts to silence warnings on debugging printfs.
353: (Thanks, Arnold.)
1.18 millert 354:
1.19 millert 355: Aug 23, 2018:
356: A long list of fixes courtesy of Arnold Robbins,
357: to whom profound thanks.
358:
359: 1. ofs-rebuild: OFS value used to rebuild the record was incorrect.
360: Fixed August 19, 2014. Revised fix August 2018.
361:
362: 2. system-status: Instead of a floating-point division by 256, use
363: the wait(2) macros to create a reasonable exit status.
364: Fixed March 12, 2016.
365:
366: 3. space: Use provided xisblank() function instead of ispace() for
367: matching [[:blank:]].
368:
369: 4. a-format: Add POSIX standard %a and %A to supported formats. Check
370: at runtime that this format is available.
371:
372: 5. decr-NF: Decrementing NF did not change $0. This is a decades-old
373: bug. There are interactions with the old and new value of OFS as well.
374: Most of the fix came from the NetBSD awk.
375:
376: 6. string-conv: String conversions of scalars were sticky. Once a
377: conversion to string happened, even with OFMT, that value was used until
378: a new numeric value was assigned, even if OFMT differed from CONVFMT,
379: and also if CONVFMT changed.
380:
381: 7. unary-plus: Unary plus on a string constant returned the string.
382: Instead, it should convert the value to numeric and give that value.
383:
384: Also added Arnold's tests for these to awktest.tar as T.arnold.
385:
386: Aug 15, 2018:
387: fixed mangled awktest.tar (thanks, Arnold), posted all
388: current (very minor) fixes to github / onetrueawk
389:
1.18 millert 390: Jun 7, 2018:
391: (yes, a long layoff)
392: Updated some broken tests (beebe.tar, T.lilly)
393: [thanks to Arnold Robbins]
394:
395: Mar 26, 2015:
396: buffer overflow in error reporting; thanks to tobias ulmer
397: and john-mark gurney for spotting it and the fix.
398:
399: Feb 4, 2013:
400: cleaned up a handful of tests that didn't seem to actually
401: test for correct behavior: T.latin1, T.gawk.
402:
403: Jan 5, 2013:
404: added ,NULL initializer to static Cells in run.c; not really
405: needed but cleaner. Thanks to Michael Bombardieri.
1.17 millert 406:
407: Dec 20, 2012:
408: fiddled makefile to get correct yacc and bison flags. pick yacc
409: (linux) or bison (mac) as necessary.
410:
411: added __attribute__((__noreturn__)) to a couple of lines in
412: proto.h, to silence someone's enthusiastic checker.
413:
414: fixed obscure call by value bug in split(a[1],a) reported on
415: 9fans. the management of temporary values is just a mess; i
416: took a shortcut by making an extra string copy. thanks
417: to paul patience and arnold robbins for passing it on and for
418: proposed patches.
419:
420: tiny fiddle in setfval to eliminate -0 results in T.expr, which
421: has irritated me for 20+ years.
1.16 millert 422:
423: Aug 10, 2011:
424: another fix to avoid core dump with delete(ARGV); again, many thanks
425: to ruslan ermilov.
426:
427: Aug 7, 2011:
428: split(s, a, //) now behaves the same as split(s, a, "")
429:
430: Jun 12, 2011:
431: /pat/, \n /pat/ {...} is now legal, though bad style to use.
432:
433: added checks to new -v code that permits -vnospace; thanks to
1.25 millert 434: ruslan ermilov for spotting this and providing the patch.
1.16 millert 435:
436: removed fixed limit on number of open files; thanks to aleksey
1.25 millert 437: cheusov and christos zoulos.
1.16 millert 438:
439: fixed day 1 bug that resurrected deleted elements of ARGV when
440: used as filenames (in lib.c).
441:
442: minor type fiddles to make gcc -Wall -pedantic happier (but not
443: totally so); turned on -fno-strict-aliasing in makefile.
444:
445: May 6, 2011:
446: added #ifdef for isblank.
447: now allows -ffoo as well as -f foo arguments.
448: (thanks, ruslan)
449:
450: May 1, 2011:
451: after advice from todd miller, kevin lo, ruslan ermilov,
452: and arnold robbins, changed srand() to return the previous
453: seed (which is 1 on the first call of srand). the seed is
454: an Awkfloat internally though converted to unsigned int to
1.25 millert 455: pass to the library srand(). thanks, everyone.
1.16 millert 456:
457: fixed a subtle (and i hope low-probability) overflow error
1.25 millert 458: in fldbld, by adding space for one extra \0. thanks to
1.16 millert 459: robert bassett for spotting this one and providing a fix.
460:
461: removed the files related to compilation on windows. i no
462: longer have anything like a current windows environment, so
463: i can't test any of it.
1.15 millert 464:
465: May 23, 2010:
466: fixed long-standing overflow bug in run.c; many thanks to
467: nelson beebe for spotting it and providing the fix.
468:
469: fixed bug that didn't parse -vd=1 properly; thanks to santiago
470: vila for spotting it.
471:
472: Feb 8, 2010:
473: i give up. replaced isblank with isspace in b.c; there are
474: no consistent header files.
475:
476: Nov 26, 2009:
477: fixed a long-standing issue with when FS takes effect. a
478: change to FS is now noticed immediately for subsequent splits.
479:
480: changed the name getline() to awkgetline() to avoid yet another
481: name conflict somewhere.
482:
483: Feb 11, 2009:
484: temporarily for now defined HAS_ISBLANK, since that seems to
485: be the best way through the thicket. isblank arrived in C99,
486: but seems to be arriving at different systems at different
487: times.
488:
489: Oct 8, 2008:
490: fixed typo in b.c that set tmpvec wrongly. no one had ever
491: run into the problem, apparently. thanks to alistair crooks.
1.14 millert 492:
493: Oct 23, 2007:
494: minor fix in lib.c: increase inputFS to 100, change malloc
1.25 millert 495: for fields to n+1.
1.14 millert 496:
497: fixed memory fault caused by out of order test in setsval.
498:
499: thanks to david o'brien, freebsd, for both fixes.
500:
501: May 1, 2007:
502: fiddle in makefile to fix for BSD make; thanks to igor sobrado.
503:
504: Mar 31, 2007:
505: fixed some null pointer refs calling adjbuf.
506:
507: Feb 21, 2007:
508: fixed a bug in matching the null RE in sub and gsub. thanks to al aho
509: who actually did the fix (in b.c), and to wolfgang seeberg for finding
510: it and providing a very compact test case.
511:
512: fixed quotation in b.c; thanks to Hal Pratt and the Princeton Dante
513: Project.
514:
515: removed some no-effect asserts in run.c.
516:
517: fiddled maketab.c to not complain about bison-generated values.
518:
519: removed the obsolete -V argument; fixed --version to print the
520: version and exit.
521:
522: fixed wording and an outright error in the usage message; thanks to igor
523: sobrado and jason mcintyre.
524:
525: fixed a bug in -d that caused core dump if no program followed.
526:
527: Jan 1, 2007:
528: dropped mac.code from makefile; there are few non-MacOSX
529: mac's these days.
530:
531: Jan 17, 2006:
532: system() not flagged as unsafe in the unadvertised -safe option.
533: found it while enhancing tests before shipping the ;login: article.
534: practice what you preach.
535:
536: removed the 9-years-obsolete -mr and -mf flags.
537:
538: added -version and --version options.
539:
540: core dump on linux with BEGIN {nextfile}, now fixed.
541:
1.25 millert 542: removed some #ifdef's in run.c and lex.c that appear to no
1.14 millert 543: longer be necessary.
544:
545: Apr 24, 2005:
546: modified lib.c so that values of $0 et al are preserved in the END
547: block, apparently as required by posix. thanks to havard eidnes
548: for the report and code.
549:
550: Jan 14, 2005:
551: fixed infinite loop in parsing, originally found by brian tsang.
552: thanks to arnold robbins for a suggestion that started me
553: rethinking it.
554:
555: Dec 31, 2004:
1.25 millert 556: prevent overflow of -f array in main, head off potential error in
557: call of SYNTAX(), test malloc return in lib.c, all with thanks to
1.14 millert 558: todd miller.
1.13 millert 559:
560: Dec 22, 2004:
561: cranked up size of NCHARS; coverity thinks it can be overrun with
562: smaller size, and i think that's right. added some assertions to b.c
563: to catch places where it might overrun. the RE code is still fragile.
564:
565: Dec 5, 2004:
566: fixed a couple of overflow problems with ridiculous field numbers:
567: e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas
568: and david o'brien at freebsd.org for patches. this really should
569: be re-done from scratch.
570:
571: Nov 21, 2004:
572: fixed another 25-year-old RE bug, in split. it's another failure
573: to (re-)initialize. thanks to steve fisher for spotting this and
574: providing a good test case.
575:
576: Nov 22, 2003:
577: fixed a bug in regular expressions that dates (so help me) from 1977;
578: it's been there from the beginning. an anchored longest match that
579: was longer than the number of states triggered a failure to initialize
580: the machine properly. many thanks to moinak ghosh for not only finding
581: this one but for providing a fix, in some of the most mysterious
582: code known to man.
583:
584: fixed a storage leak in call() that appears to have been there since
1.25 millert 585: 1983 or so -- a function without an explicit return that assigns a
586: string to a parameter leaked a Cell. thanks to moinak ghosh for
1.13 millert 587: spotting this very subtle one.
588:
589: Jul 31, 2003:
590: fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
591: that mis-handled the character 255 in input. (it was being compared
592: to EOF with a signed comparison.)
593:
594: Jul 29, 2003:
595: fixed (i think) the long-standing botch that included the beginning of
596: line state ^ for RE's in the set of valid characters; this led to a
597: variety of odd problems, including failure to properly match certain
598: regular expressions in non-US locales. thanks to ruslan for keeping
599: at this one.
600:
601: Jul 28, 2003:
602: n-th try at getting internationalization right, with thanks to volker
603: kiefel, arnold robbins and ruslan ermilov for advice, though they
604: should not be blamed for the outcome. according to posix, "." is the
605: radix character in programs and command line arguments regardless of
606: the locale; otherwise, the locale should prevail for input and output
607: of numbers. so it's intended to work that way.
1.25 millert 608:
1.13 millert 609: i have rescinded the attempt to use strcoll in expanding shorthands in
610: regular expressions (cclenter). its properties are much too
611: surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
612: in locale fr_CA. i can see how this might arise by implementation
613: but i cannot explain it to a human user. (this behavior can be seen
614: in gawk as well; we're leaning on the same library.)
615:
616: the issue appears to be that strcoll is meant for sorting, where
617: merging upper and lower case may make sense (though note that unix
618: sort does not do this by default either). it is not appropriate
619: for regular expressions, where the goal is to match specific
620: patterns of characters. in any case, the notations [:lower:], etc.,
621: are available in awk, and they are more likely to work correctly in
622: most locales.
623:
624: a moratorium is hereby declared on internationalization changes.
625: i apologize to friends and colleagues in other parts of the world.
626: i would truly like to get this "right", but i don't know what
627: that is, and i do not want to keep making changes until it's clear.
628:
629: Jul 4, 2003:
630: fixed bug that permitted non-terminated RE, as in "awk /x".
631:
632: Jun 1, 2003:
633: subtle change to split: if source is empty, number of elems
634: is always 0 and the array is not set.
635:
636: Mar 21, 2003:
637: added some parens to isblank, in another attempt to make things
638: internationally portable.
639:
640: Mar 14, 2003:
641: the internationalization changes, somewhat modified, are now
642: reinstated. in theory awk will now do character comparisons
643: and case conversions in national language, but "." will always
644: be the decimal point separator on input and output regardless
645: of national language. isblank(){} has an #ifndef.
646:
647: this no longer compiles on windows: LC_MESSAGES isn't defined
648: in vc6++.
649:
650: fixed subtle behavior in field and record splitting: if FS is
651: a single character and RS is not empty, \n is NOT a separator.
652: this tortuous reading is found in the awk book; behavior now
653: matches gawk and mawk.
1.11 millert 654:
655: Dec 13, 2002:
656: for the moment, the internationalization changes of nov 29 are
657: rolled back -- programs like x = 1.2 don't work in some locales,
658: because the parser is expecting x = 1,2. until i understand this
659: better, this will have to wait.
660:
661: Nov 29, 2002:
662: modified b.c (with tiny changes in main and run) to support
663: locales, using strcoll and iswhatever tests for posix character
664: classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
665: the function isblank doesn't seem to have propagated to any
666: header file near me, so it's there explicitly. not properly
667: tested on non-ascii character sets by me.
668:
669: Jun 28, 2002:
670: modified run/format() and tran/getsval() to do a slightly better
671: job on using OFMT for output from print and CONVFMT for other
1.25 millert 672: number->string conversions, as promised by posix and done by
1.11 millert 673: gawk and mawk. there are still places where it doesn't work
674: right if CONVFMT is changed; by then the STR attribute of the
675: variable has been irrevocably set. thanks to arnold robbins for
676: code and examples.
677:
678: fixed subtle bug in format that could get core dump. thanks to
679: Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
680: minor cleanup in run.c / format() at the same time.
681:
682: added some tests for null pointers to debugging printf's, which
683: were never intended for external consumption. thanks to dave
684: kerns (dkerns@lucent.com) for pointing this out.
685:
686: GNU compatibility: an empty regexp matches anything (thanks to
687: dag-erling smorgrav, des@ofug.org). subject to reversion if
688: this does more harm than good.
689:
690: pervasive small changes to make things more const-correct, as
691: reported by gcc's -Wwrite-strings. as it says in the gcc manual,
692: this may be more nuisance than useful. provoked by a suggestion
693: and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
694:
695: minor documentation changes to note that this now compiles out
696: of the box on Mac OS X.
697:
698: Feb 10, 2002:
699: changed types in posix chars structure to quiet solaris cc.
700:
701: Jan 1, 2002:
702: fflush() or fflush("") flushes all files and pipes.
703:
1.25 millert 704: length(arrayname) returns number of elements; thanks to
1.11 millert 705: arnold robbins for suggestion.
706:
707: added a makefile.win to make it easier to build on windows.
708: based on dan allen's buildwin.bat.
709:
710: Nov 16, 2001:
711: added support for posix character class names like [:digit:],
712: which are not exactly shorter than [0-9] and perhaps no more
713: portable. thanks to dag-erling smorgrav for code.
714:
715: Feb 16, 2001:
716: removed -m option; no longer needed, and it was actually
717: broken (noted thanks to volker kiefel).
718:
719: Feb 10, 2001:
720: fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
721: and period was accepted as a valid number if it started with a period.
722: this would never have happened with the lex version.
723:
724: other 1-character botches, now fixed, include a bare $ and a
725: bare " at the end of the input.
726:
727: Feb 7, 2001:
728: more (const char *) casts in b.c and tran.c to silence warnings.
1.8 millert 729:
1.10 millert 730: Nov 15, 2000:
731: fixed a bug introduced in august 1997 that caused expressions
732: like $f[1] to be syntax errors. thanks to arnold robbins for
733: noticing this and providing a fix.
734:
735: Oct 30, 2000:
736: fixed some nextfile bugs: not handling all cases. thanks to
737: arnold robbins for pointing this out. new regressions added.
738:
739: close() is now a function. it returns whatever the library
740: fclose returns, and -1 for closing a file or pipe that wasn't
741: opened.
742:
743: Sep 24, 2000:
744: permit \n explicitly in character classes; won't work right
745: if comes in as "[\n]" but ok as /[\n]/, because of multiple
746: processing of \'s. thanks to arnold robbins.
747:
748: July 5, 2000:
749: minor fiddles in tran.c to keep compilers happy about uschar.
750: thanks to norman wilson.
751:
752: May 25, 2000:
753: yet another attempt at making 8-bit input work, with another
1.25 millert 754: band-aid in b.c (member()), and some (uschar) casts to head
1.10 millert 755: off potential errors in subscripts (like isdigit). also
756: changed HAT to NCHARS-2. thanks again to santiago vila.
757:
758: changed maketab.c to ignore apparently out of range definitions
759: instead of halting; new freeBSD generates one. thanks to
760: jon snader <jsnader@ix.netcom.com> for pointing out the problem.
761:
762: May 2, 2000:
763: fixed an 8-bit problem in b.c by making several char*'s into
764: unsigned char*'s. not clear i have them all yet. thanks to
765: Santiago Vila <sanvila@unex.es> for the bug report.
766:
767: Apr 21, 2000:
768: finally found and fixed a memory leak in function call; it's
769: been there since functions were added ~1983. thanks to
770: jon bentley for the test case that found it.
771:
772: added test in envinit to catch environment "variables" with
1.12 otto 773: names beginning with '='; thanks to Berend Hasselman.
1.10 millert 774:
775: Jul 28, 1999:
776: added test in defn() to catch function foo(foo), which
777: otherwise recurses until core dump. thanks to arnold
778: robbins for noticing this.
779:
1.9 millert 780: Jun 20, 1999:
781: added *bp in gettok in lex.c; appears possible to exit function
782: without terminating the string. thanks to russ cox.
783:
784: Jun 2, 1999:
785: added function stdinit() to run to initialize files[] array,
786: in case stdin, etc., are not constants; some compilers care.
787:
788: May 10, 1999:
789: replaced the ERROR ... FATAL, etc., macros with functions
790: based on vprintf, to avoid problems caused by overrunning
791: fixed-size errbuf array. thanks to ralph corderoy for the
792: impetus, and for pointing out a string termination bug in
793: qstring as well.
794:
795: Apr 21, 1999:
796: fixed bug that caused occasional core dumps with commandline
797: variable with value ending in \. (thanks to nelson beebe for
798: the test case.)
799:
1.8 millert 800: Apr 16, 1999:
1.25 millert 801: with code kindly provided by Bruce Lilly, awk now parses
1.8 millert 802: /=/ and similar constructs more sensibly in more places.
1.10 millert 803: Bruce also provided some helpful test cases.
1.8 millert 804:
805: Apr 5, 1999:
806: changed true/false to True/False in run.c to make it
807: easier to compile with C++. Added some casts on malloc
808: and realloc to be honest about casts; ditto. changed
809: ltype int to long in struct rrow to reduce some 64-bit
810: complaints; other changes scattered throughout for the
811: same purpose. thanks to Nelson Beebe for these portability
812: improvements.
813:
814: removed some horrible pointer-int casting in b.c and elsewhere
815: by adding ptoi and itonp to localize the casts, which are
816: all benign. fixed one incipient bug that showed up on sgi
817: in 64-bit mode.
818:
819: reset lineno for new source file; include filename in error
820: message. also fixed line number error in continuation lines.
821: (thanks to Nelson Beebe for both of these.)
822:
823: Mar 24, 1999:
824: Nelson Beebe notes that irix 5.3 yacc dies with a bogus
825: error; use a newer version or switch to bison, since sgi
826: is unlikely to fix it.
1.1 tholo 827:
1.7 millert 828: Mar 5, 1999:
1.9 millert 829: changed isnumber to is_number to avoid the problem caused by
830: versions of ctype.h that include the name isnumber.
1.7 millert 831:
832: distribution now includes a script for building on a Mac,
833: thanks to Dan Allen.
834:
835: Feb 20, 1999:
836: fixed memory leaks in run.c (call) and tran.c (setfval).
837: thanks to Stephen Nutt for finding these and providing the fixes.
838:
839: Jan 13, 1999:
840: replaced srand argument by (unsigned int) in run.c;
841: avoids problem on Mac and potentially on Unix & Windows.
842: thanks to Dan Allen.
843:
844: added a few (int) casts to silence useless compiler warnings.
845: e.g., errorflag= in run.c jump().
846:
847: added proctab.c to the bundle outout; one less thing
848: to have to compile out of the box.
849:
850: added calls to _popen and _pclose to the win95 stub for
851: pipes (thanks to Steve Adams for this helpful suggestion).
852: seems to work, though properties are not well understood
853: by me, and it appears that under some circumstances the
854: pipe output is truncated. Be careful.
855:
856: Oct 19, 1998:
857: fixed a couple of bugs in getrec: could fail to update $0
1.25 millert 858: after a getline var; because inputFS wasn't initialized,
1.7 millert 859: could split $0 on every character, a misleading diversion.
860:
861: fixed caching bug in makedfa: LRU was actually removing
862: least often used.
863:
864: thanks to ross ridge for finding these, and for providing
865: great bug reports.
866:
867: May 12, 1998:
868: fixed potential bug in readrec: might fail to update record
869: pointer after growing. thanks to dan levy for spotting this
870: and suggesting the fix.
871:
872: Mar 12, 1998:
873: added -V to print version number and die.
1.19 millert 874:
875: [notify dave kerns, dkerns@dacsoup.ih.lucent.com]
1.7 millert 876:
877: Feb 11, 1998:
878: subtle silent bug in lex.c: if the program ended with a number
879: longer than 1 digit, part of the input would be pushed back and
880: parsed again because token buffer wasn't terminated right.
881: example: awk 'length($0) > 10'. blush. at least i found it
882: myself.
883:
884: Aug 31, 1997:
885: s/adelete/awkdelete/: SGI uses this in malloc.h.
886: thanks to nelson beebe for pointing this one out.
887:
888: Aug 21, 1997:
889: fixed some bugs in sub and gsub when replacement includes \\.
890: this is a dark, horrible corner, but at least now i believe that
891: the behavior is the same as gawk and the intended posix standard.
892: thanks to arnold robbins for advice here.
893:
894: Aug 9, 1997:
895: somewhat regretfully, replaced the ancient lex-based lexical
896: analyzer with one written in C. it's longer, generates less code,
897: and more portable; the old one depended too much on mysterious
898: properties of lex that were not preserved in other environments.
899: in theory these recognize the same language.
900:
901: now using strtod to test whether a string is a number, instead of
902: the convoluted original function. should be more portable and
903: reliable if strtod is implemented right.
904:
905: removed now-pointless optimization in makefile that tries to avoid
906: recompilation when awkgram.y is changed but symbols are not.
907:
908: removed most fixed-size arrays, though a handful remain, some
909: of which are unchecked. you have been warned.
910:
911: Aug 4, 1997:
912: with some trepidation, replaced the ancient code that managed
913: fields and $0 in fixed-size arrays with arrays that grow on
914: demand. there is still some tension between trying to make this
915: run fast and making it clean; not sure it's right yet.
916:
917: the ill-conceived -mr and -mf arguments are now useful only
918: for debugging. previous dynamic string code removed.
919:
920: numerous other minor cleanups along the way.
1.1 tholo 921:
1.7 millert 922: Jul 30, 1997:
923: using code provided by dan levy (to whom profuse thanks), replaced
924: fixed-size arrays and awkward kludges by a fairly uniform mechanism
925: to grow arrays as needed for printf, sub, gsub, etc.
1.1 tholo 926:
1.7 millert 927: Jul 23, 1997:
928: falling off the end of a function returns "" and 0, not 0.
929: thanks to arnold robbins.
1.1 tholo 930:
1.7 millert 931: Jun 17, 1997:
932: replaced several fixed-size arrays by dynamically-created ones
933: in run.c; added overflow tests to some previously unchecked cases.
934: getline, toupper, tolower.
1.1 tholo 935:
1.7 millert 936: getline code is still broken in that recursive calls may wind
937: up using the same space. [fixed later]
1.1 tholo 938:
1.7 millert 939: increased RECSIZE to 8192 to push problems further over the horizon.
1.1 tholo 940:
1.7 millert 941: added \r to \n as input line separator for programs, not data.
942: damn CRLFs.
1.1 tholo 943:
1.7 millert 944: modified format() to permit explicit printf("%c", 0) to include
945: a null byte in output. thanks to ken stailey for the fix.
1.1 tholo 946:
1.7 millert 947: added a "-safe" argument that disables file output (print >,
948: print >>), process creation (cmd|getline, print |, system), and
949: access to the environment (ENVIRON). this is a first approximation
950: to a "safe" version of awk, but don't rely on it too much. thanks
951: to joan feigenbaum and matt blaze for the inspiration long ago.
1.1 tholo 952:
1.7 millert 953: Jul 8, 1996:
954: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
955: ralph corderoy.
1.1 tholo 956:
1.7 millert 957: Jun 29, 1996:
958: fixed awful bug in new field splitting; didn't get all the places
959: where input was done.
1.1 tholo 960:
1.7 millert 961: Jun 28, 1996:
962: changed field-splitting to conform to posix definition: fields are
963: split using the value of FS at the time of input; it used to be
964: the value when the field or NF was first referred to, a much less
965: predictable definition. thanks to arnold robbins for encouragement
966: to do the right thing.
1.1 tholo 967:
1.7 millert 968: May 28, 1996:
969: fixed appalling but apparently unimportant bug in parsing octal
970: numbers in reg exprs.
1.1 tholo 971:
1.7 millert 972: explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
1.1 tholo 973:
1.7 millert 974: May 27, 1996:
975: cleaned up some declarations so gcc -Wall is now almost silent.
1.1 tholo 976:
1.7 millert 977: makefile now includes backup copies of ytab.c and lexyy.c in case
978: one makes before looking; it also avoids recreating lexyy.c unless
979: really needed.
1.1 tholo 980:
1.7 millert 981: s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
982: with unwisely-written header files.
1.1 tholo 983:
1.7 millert 984: thanks to jeffrey friedl for several of these.
1.1 tholo 985:
1.7 millert 986: May 26, 1996:
987: an attempt to rationalize the (unsigned) char issue. almost all
988: instances of unsigned char have been removed; the handful of places
989: in b.c where chars are used as table indices have been hand-crafted.
990: added some latin-1 tests to the regression, but i'm not confident;
991: none of my compilers seem to care much. thanks to nelson beebe for
992: pointing out some others that do care.
1.1 tholo 993:
1.7 millert 994: May 2, 1996:
995: removed all register declarations.
1.1 tholo 996:
1.7 millert 997: enhanced split(), as in gawk, etc: split(s, a, "") splits s into
998: a[1]...a[length(s)] with each character a single element.
1.1 tholo 999:
1.7 millert 1000: made the same changes for field-splitting if FS is "".
1.1 tholo 1001:
1.7 millert 1002: added nextfile, as in gawk: causes immediate advance to next
1003: input file. (thanks to arnold robbins for inspiration and code).
1.1 tholo 1004:
1.7 millert 1005: small fixes to regexpr code: can now handle []], [[], and
1.25 millert 1006: variants; [] is now a syntax error, rather than matching
1.7 millert 1007: everything; [z-a] is now empty, not z. far from complete
1008: or correct, however. (thanks to jeffrey friedl for pointing out
1009: some awful behaviors.)
1.1 tholo 1010:
1.7 millert 1011: Apr 29, 1996:
1.12 otto 1012: replaced uchar by uschar everywhere; apparently some compilers
1.7 millert 1013: usurp this name and this causes conflicts.
1.1 tholo 1014:
1.7 millert 1015: fixed call to time in run.c (bltin); arg is time_t *.
1.1 tholo 1016:
1.7 millert 1017: replaced horrible pointer/long punning in b.c by a legitimate
1018: union. should be safer on 64-bit machines and cleaner everywhere.
1019: (thanks to nelson beebe for pointing out some of these problems.)
1.1 tholo 1020:
1.7 millert 1021: replaced nested comments by #if 0...#endif in run.c, lib.c.
1.1 tholo 1022:
1.7 millert 1023: removed getsval, setsval, execute macros from run.c and lib.c.
1024: machines are 100x faster than they were when these macros were
1025: first used.
1.1 tholo 1026:
1.7 millert 1027: revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
1028: y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
1029: portability to nameless systems.
1.1 tholo 1030:
1.7 millert 1031: "make bundle" now includes yacc and lex output files for recipients
1032: who don't have yacc or lex.
1.1 tholo 1033:
1.7 millert 1034: Aug 15, 1995:
1035: initialized Cells in setsymtab more carefully; some fields
1036: were not set. (thanks to purify, all of whose complaints i
1037: think i now understand.)
1.1 tholo 1038:
1.7 millert 1039: fixed at least one error in gsub that looked at -1-th element
1040: of an array when substituting for a null match (e.g., $).
1.1 tholo 1041:
1.7 millert 1042: delete arrayname is now legal; it clears the elements but leaves
1043: the array, which may not be the right behavior.
1.1 tholo 1044:
1.7 millert 1045: modified makefile: my current make can't cope with the test used
1046: to avoid unnecessary yacc invocations.
1.1 tholo 1047:
1.7 millert 1048: Jul 17, 1995:
1049: added dynamically growing strings to awk.lx.l and b.c
1050: to permit regular expressions to be much bigger.
1051: the state arrays can still overflow.
1.1 tholo 1052:
1.7 millert 1053: Aug 24, 1994:
1054: detect duplicate arguments in function definitions (mdm).
1.1 tholo 1055:
1.7 millert 1056: May 11, 1994:
1057: trivial fix to printf to limit string size in sub().
1.1 tholo 1058:
1.7 millert 1059: Apr 22, 1994:
1060: fixed yet another subtle self-assignment problem:
1061: $1 = $2; $1 = $1 clobbered $1.
1.1 tholo 1062:
1.7 millert 1063: Regression tests now use private echo, to avoid quoting problems.
1.1 tholo 1064:
1.7 millert 1065: Feb 2, 1994:
1066: changed error() to print line number as %d, not %g.
1.1 tholo 1067:
1.7 millert 1068: Jul 23, 1993:
1069: cosmetic changes: increased sizes of some arrays,
1070: reworded some error messages.
1.1 tholo 1071:
1.7 millert 1072: added CONVFMT as in posix (just replaced OFMT in getsval)
1.1 tholo 1073:
1.7 millert 1074: FILENAME is now "" until the first thing that causes a file
1075: to be opened.
1.1 tholo 1076:
1.7 millert 1077: Nov 28, 1992:
1078: deleted yyunput and yyoutput from proto.h;
1079: different versions of lex give these different declarations.
1.1 tholo 1080:
1.7 millert 1081: May 31, 1992:
1082: added -mr N and -mf N options: more record and fields.
1083: these really ought to adjust automatically.
1.1 tholo 1084:
1.7 millert 1085: cleaned up some error messages; "out of space" now means
1086: malloc returned NULL in all cases.
1.1 tholo 1087:
1.7 millert 1088: changed rehash so that if it runs out, it just returns;
1089: things will continue to run slow, but maybe a bit longer.
1.1 tholo 1090:
1.7 millert 1091: Apr 24, 1992:
1092: remove redundant close of stdin when using -f -.
1.1 tholo 1093:
1.7 millert 1094: got rid of core dump with -d; awk -d just prints date.
1.1 tholo 1095:
1.7 millert 1096: Apr 12, 1992:
1097: added explicit check for /dev/std(in,out,err) in redirection.
1098: unlike gawk, no /dev/fd/n yet.
1.1 tholo 1099:
1.7 millert 1100: added (file/pipe) builtin. hard to test satisfactorily.
1101: not posix.
1.1 tholo 1102:
1.7 millert 1103: Feb 20, 1992:
1104: recompile after abortive changes; should be unchanged.
1.1 tholo 1105:
1.7 millert 1106: Dec 2, 1991:
1107: die-casting time: converted to ansi C, installed that.
1.1 tholo 1108:
1.7 millert 1109: Nov 30, 1991:
1110: fixed storage leak in freefa, failing to recover [N]CCL.
1111: thanks to Bill Jones (jones@cs.usask.ca)
1.1 tholo 1112:
1.7 millert 1113: Nov 19, 1991:
1114: use RAND_MAX instead of literal in builtin().
1.1 tholo 1115:
1.7 millert 1116: Nov 12, 1991:
1117: cranked up some fixed-size arrays in b.c, and added a test for
1118: overflow in penter. thanks to mark larsen.
1.1 tholo 1119:
1.7 millert 1120: Sep 24, 1991:
1121: increased buffer in gsub. a very crude fix to a general problem.
1122: and again on Sep 26.
1.1 tholo 1123:
1.7 millert 1124: Aug 18, 1991:
1125: enforce variable name syntax for commandline variables: has to
1126: start with letter or _.
1.1 tholo 1127:
1.7 millert 1128: Jul 27, 1991:
1129: allow newline after ; in for statements.
1.1 tholo 1130:
1.7 millert 1131: Jul 21, 1991:
1132: fixed so that in self-assignment like $1=$1, side effects
1133: like recomputing $0 take place. (this is getting subtle.)
1.1 tholo 1134:
1.7 millert 1135: Jun 30, 1991:
1136: better test for detecting too-long output record.
1.1 tholo 1137:
1.7 millert 1138: Jun 2, 1991:
1139: better defense against very long printf strings.
1140: made break and continue illegal outside of loops.
1.1 tholo 1141:
1.7 millert 1142: May 13, 1991:
1143: removed extra arg on gettemp, tempfree. minor error message rewording.
1.1 tholo 1144:
1145: May 6, 1991:
1146: fixed silly bug in hex parsing in hexstr().
1147: removed an apparently unnecessary test in isnumber().
1148: warn about weird printf conversions.
1149: fixed unchecked array overwrite in relex().
1150:
1151: changed for (i in array) to access elements in sorted order.
1152: then unchanged it -- it really does run slower in too many cases.
1153: left the code in place, commented out.
1154:
1.7 millert 1155: Feb 10, 1991:
1156: check error status on all writes, to avoid banging on full disks.
1.1 tholo 1157:
1.7 millert 1158: Jan 28, 1991:
1159: awk -f - reads the program from stdin.
1.1 tholo 1160:
1.7 millert 1161: Jan 11, 1991:
1162: failed to set numeric state on $0 in cmd|getline context in run.c.
1.1 tholo 1163:
1.7 millert 1164: Nov 2, 1990:
1165: fixed sleazy test for integrality in getsval; use modf.
1.1 tholo 1166:
1.7 millert 1167: Oct 29, 1990:
1168: fixed sleazy buggy code in lib.c that looked (incorrectly) for
1169: too long input lines.
1.1 tholo 1170:
1.7 millert 1171: Oct 14, 1990:
1172: fixed the bug on p. 198 in which it couldn't deduce that an
1173: argument was an array in some contexts. replaced the error
1174: message in intest() by code that damn well makes it an array.
1.1 tholo 1175:
1.7 millert 1176: Oct 8, 1990:
1177: fixed horrible bug: types and values were not preserved in
1178: some kinds of self-assignment. (in assign().)
1.1 tholo 1179:
1.7 millert 1180: Aug 24, 1990:
1181: changed NCHARS to 256 to handle 8-bit characters in strings
1182: presented to match(), etc.
1.1 tholo 1183:
1.7 millert 1184: Jun 26, 1990:
1185: changed struct rrow (awk.h) to use long instead of int for lval,
1186: since cfoll() stores a pointer in it. now works better when int's
1187: are smaller than pointers!
1.1 tholo 1188:
1.7 millert 1189: May 6, 1990:
1190: AVA fixed the grammar so that ! is uniformly of the same precedence as
1191: unary + and -. This renders illegal some constructs like !x=y, which
1192: now has to be parenthesized as !(x=y), and makes others work properly:
1193: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements.
1194: (These problems were pointed out by Bob Lenk of Posix.)
1.1 tholo 1195:
1.7 millert 1196: Added \x to regular expressions (already in strings).
1197: Limited octal to octal digits; \8 and \9 are not octal.
1198: Centralized the code for parsing escapes in regular expressions.
1199: Added a bunch of tests to T.re and T.sub to verify some of this.
1.1 tholo 1200:
1.7 millert 1201: Feb 9, 1990:
1202: fixed null pointer dereference bug in main.c: -F[nothing]. sigh.
1.1 tholo 1203:
1.7 millert 1204: restored srand behavior: it returns the current seed.
1.1 tholo 1205:
1.7 millert 1206: Jan 18, 1990:
1207: srand now returns previous seed value (0 to start).
1.1 tholo 1208:
1.7 millert 1209: Jan 5, 1990:
1210: fix potential problem in tran.c -- something was freed,
1211: then used in freesymtab.
1.1 tholo 1212:
1.7 millert 1213: Oct 18, 1989:
1214: another try to get the max number of open files set with
1215: relatively machine-independent code.
1.1 tholo 1216:
1.7 millert 1217: small fix to input() in case of multiple reads after EOF.
1.1 tholo 1218:
1.7 millert 1219: Oct 11, 1989:
1220: FILENAME is now defined in the BEGIN block -- too many old
1221: programs broke.
1.1 tholo 1222:
1.7 millert 1223: "-" means stdin in getline as well as on the commandline.
1.1 tholo 1224:
1.7 millert 1225: added a bunch of casts to the code to tell the truth about
1226: char * vs. unsigned char *, a right royal pain. added a
1227: setlocale call to the front of main, though probably no one
1228: has it usefully implemented yet.
1.1 tholo 1229:
1.7 millert 1230: Aug 24, 1989:
1231: removed redundant relational tests against nullnode if parse
1232: tree already had a relational at that point.
1.1 tholo 1233:
1.7 millert 1234: Aug 11, 1989:
1235: fixed bug: commandline variable assignment has to look like
1236: var=something. (consider the man page for =, in file =.1)
1.1 tholo 1237:
1.7 millert 1238: changed number of arguments to functions to static arrays
1239: to avoid repeated malloc calls.
1.1 tholo 1240:
1.7 millert 1241: Aug 2, 1989:
1242: restored -F (space) separator
1.1 tholo 1243:
1.7 millert 1244: Jul 30, 1989:
1245: added -v x=1 y=2 ... for immediate commandline variable assignment;
1246: done before the BEGIN block for sure. they have to precede the
1247: program if the program is on the commandline.
1248: Modified Aug 2 to require a separate -v for each assignment.
1.1 tholo 1249:
1.7 millert 1250: Jul 10, 1989:
1251: fixed ref-thru-zero bug in environment code in tran.c
1.1 tholo 1252:
1.7 millert 1253: Jun 23, 1989:
1254: add newline to usage message.
1.1 tholo 1255:
1.7 millert 1256: Jun 14, 1989:
1257: added some missing ansi printf conversion letters: %i %X %E %G.
1258: no sensible meaning for h or L, so they may not do what one expects.
1.1 tholo 1259:
1.7 millert 1260: made %* conversions work.
1.1 tholo 1261:
1.7 millert 1262: changed x^y so that if n is a positive integer, it's done
1263: by explicit multiplication, thus achieving maximum accuracy.
1264: (this should be done by pow() but it seems not to be locally.)
1265: done to x ^= y as well.
1.1 tholo 1266:
1.7 millert 1267: Jun 4, 1989:
1268: ENVIRON array contains environment: if shell variable V=thing,
1269: ENVIRON["V"] is "thing"
1.1 tholo 1270:
1.7 millert 1271: multiple -f arguments permitted. error reporting is naive.
1272: (they were permitted before, but only the last was used.)
1.1 tholo 1273:
1.7 millert 1274: fixed a really stupid botch in the debugging macro dprintf
1.1 tholo 1275:
1.7 millert 1276: fixed order of evaluation of commandline assignments to match
1277: what the book claims: an argument of the form x=e is evaluated
1278: at the time it would have been opened if it were a filename (p 63).
1279: this invalidates the suggested answer to ex 4-1 (p 195).
1.1 tholo 1280:
1.7 millert 1281: removed some code that permitted -F (space) fieldseparator,
1282: since it didn't quite work right anyway. (restored aug 2)
1.1 tholo 1283:
1.7 millert 1284: Apr 27, 1989:
1285: Line number now accumulated correctly for comment lines.
1.1 tholo 1286:
1.7 millert 1287: Apr 26, 1989:
1288: Debugging output now includes a version date,
1289: if one compiles it into the source each time.
1.1 tholo 1290:
1.7 millert 1291: Apr 9, 1989:
1292: Changed grammar to prohibit constants as 3rd arg of sub and gsub;
1293: prevents class of overwriting-a-constant errors. (Last one?)
1294: This invalidates the "banana" example on page 43 of the book.
1.1 tholo 1295:
1.7 millert 1296: Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal),
1297: as in ANSI, for strings. Rescinded the sloppiness that permitted
1298: non-octal digits in \ooo. Warning: not all compilers and libraries
1299: will be able to deal with \x correctly.
1.1 tholo 1300:
1.7 millert 1301: Jan 9, 1989:
1302: Fixed bug that caused tempcell list to contain a duplicate.
1303: The fix is kludgy.
1.1 tholo 1304:
1.7 millert 1305: Dec 17, 1988:
1306: Catches some more commandline errors in main.
1307: Removed redundant decl of modf in run.c (confuses some compilers).
1308: Warning: there's no single declaration of malloc, etc., in awk.h
1309: that seems to satisfy all compilers.
1.1 tholo 1310:
1.7 millert 1311: Dec 7, 1988:
1312: Added a bit of code to error printing to avoid printing nulls.
1313: (Not clear that it actually would.)
1.1 tholo 1314:
1.7 millert 1315: Nov 27, 1988:
1316: With fear and trembling, modified the grammar to permit
1317: multiple pattern-action statements on one line without
1318: an explicit separator. By definition, this capitulation
1319: to the ghost of ancient implementations remains undefined
1320: and thus subject to change without notice or apology.
1321: DO NOT COUNT ON IT.
1.1 tholo 1322:
1.7 millert 1323: Oct 30, 1988:
1324: Fixed bug in call() that failed to recover storage.
1.1 tholo 1325:
1.7 millert 1326: A warning is now generated if there are more arguments
1327: in the call than in the definition (in lieu of fixing
1328: another storage leak).
1.2 millert 1329:
1.7 millert 1330: Oct 20, 1988:
1331: Fixed %c: if expr is numeric, use numeric value;
1332: otherwise print 1st char of string value. still
1333: doesn't work if the value is 0 -- won't print \0.
1.2 millert 1334:
1.7 millert 1335: Added a few more checks for running out of malloc.
1.2 millert 1336:
1.7 millert 1337: Oct 12, 1988:
1338: Fixed bug in call() that freed local arrays twice.
1.5 kstailey 1339:
1.7 millert 1340: Fixed to handle deletion of non-existent array right;
1341: complains about attempt to delete non-array element.
1.6 kstailey 1342:
1.7 millert 1343: Sep 30, 1988:
1344: Now guarantees to evaluate all arguments of built-in
1345: functions, as in C; the appearance is that arguments
1346: are evaluated before the function is called. Places
1347: affected are sub (gsub was ok), substr, printf, and
1348: all the built-in arithmetic functions in bltin().
1349: A warning is generated if a bltin() is called with
1350: the wrong number of arguments.
1.6 kstailey 1351:
1.7 millert 1352: This requires changing makeprof on p167 of the book.
1.6 kstailey 1353:
1.7 millert 1354: Aug 23, 1988:
1355: setting FILENAME in BEGIN caused core dump, apparently
1356: because it was freeing space not allocated by malloc.
1.6 kstailey 1357:
1.7 millert 1358: July 24, 1988:
1359: fixed egregious error in toupper/tolower functions.
1360: still subject to rescinding, however.
1.6 kstailey 1361:
1.7 millert 1362: July 2, 1988:
1363: flush stdout before opening file or pipe
1.6 kstailey 1364:
1.7 millert 1365: July 2, 1988:
1366: performance bug in b.c/cgoto(): not freeing some sets of states.
1367: partial fix only right now, and the number of states increased
1368: to make it less obvious.
1.6 kstailey 1369:
1.7 millert 1370: June 1, 1988:
1371: check error status on close
1.6 kstailey 1372:
1.7 millert 1373: May 28, 1988:
1374: srand returns seed value it's using.
1375: see 1/18/90
1.6 kstailey 1376:
1.7 millert 1377: May 22, 1988:
1378: Removed limit on depth of function calls.
1.6 kstailey 1379:
1.7 millert 1380: May 10, 1988:
1381: Fixed lib.c to permit _ in commandline variable names.
1.6 kstailey 1382:
1.7 millert 1383: Mar 25, 1988:
1384: main.c fixed to recognize -- as terminator of command-
1385: line options. Illegal options flagged.
1386: Error reporting slightly cleaned up.
1.6 kstailey 1387:
1.7 millert 1388: Dec 2, 1987:
1389: Newer C compilers apply a strict scope rule to extern
1390: declarations within functions. Two extern declarations in
1391: lib.c and tran.c have been moved to obviate this problem.
1.6 kstailey 1392:
1.7 millert 1393: Oct xx, 1987:
1394: Reluctantly added toupper and tolower functions.
1395: Subject to rescinding without notice.
1.6 kstailey 1396:
1.7 millert 1397: Sep 17, 1987:
1398: Error-message printer had printf(s) instead of
1399: printf("%s",s); got core dumps when the message
1400: included a %.
1.6 kstailey 1401:
1.7 millert 1402: Sep 12, 1987:
1403: Very long printf strings caused core dump;
1404: fixed aprintf, asprintf, format to catch them.
1405: Can still get a core dump in printf itself.
1.6 kstailey 1406:
1407:
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