Annotation of src/usr.bin/awk/FIXES, Revision 1.47
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1.1 tholo 23: ****************************************************************/
24:
25: This file lists all bug fixes, changes, etc., made since the AWK book
1.47 ! millert 26: was sent to the printers in August 1987.
1.45 millert 27:
1.47 ! millert 28: Aug 30, 2022:
! 29: Various leaks and use-after-free issues plugged/fixed.
! 30: Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
1.46 millert 31:
32: May 23, 2022:
33: Memory leak when assigning a string to some of the built-in
34: variables. allocated string erroneously marked DONTFREE.
35: Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
36:
1.45 millert 37: Mar 14, 2022:
1.46 millert 38: Historic bug: command-line "name=value" assignment had been
39: truncating its entry in ARGV. (circa 1989) Thanks to
40: Miguel Pineiro Jr. <mpj@pineiro.cc>.
1.44 millert 41:
42: Mar 3, 2022:
43: Fixed file management memory leak that appears to have been
44: there since the files array was first initialized with stdin,
45: stdout, and stderr (circa 1992). Thanks to Miguel Pineiro Jr.
46: <mpj@pineiro.cc>.
1.43 millert 47:
48: December 8, 2021:
49: The error handling in closefile and closeall was mangled. Long
50: standing warnings had been made fatal and some fatal errors went
51: undetected. Thanks to Miguel Pineiro Jr. <mpj@pineiro.cc>.
1.42 millert 52:
53: Nov 03, 2021:
54: getline accesses uninitialized data after getrec()
55: returns 0 on EOF and leaves the contents of buf unchanged.
56: Thanks to Volodymyr Gubarkov, and Todd C Miller.
1.41 millert 57:
58: Oct 12, 2021:
59: The fix for #83 changed the code to insert 2 chars, but the
60: call to adjbuf just above it only allows for 1 char. This can
61: cause a heap buffer overflow.
62:
63: July 27, 2021:
64: As per IEEE Std 1003.1-2008, -F "str" is now consistent with
65: -v FS="str" when str is null. Thanks to Warner Losh.
66:
67: July 24, 2021:
68: Fix readrec's definition of a record. This fixes an issue
69: with NetBSD's RS regular expression support that can cause
70: an infinite read loop. Thanks to Miguel Pineiro Jr.
71:
72: Fix regular expression RS ^-anchoring. RS ^-anchoring needs to
73: know if it is reading the first record of a file. This change
74: restores a missing line that was overlooked when porting NetBSD's
75: RS regex functionality. Thanks to Miguel Pineiro Jr.
76:
77: Fix size computation in replace_repeat() for special case
78: REPEAT_WITH_Q. Thanks to Todd C. Miller.
79:
80: February 15, 2021:
81: Small fix so that awk will compile again with g++. Thanks to
82: Arnold Robbins.
83:
84: January 06, 2021:
85: Fix a decision bug with trailing stuff in lib.c:is_valid_number
86: after recent changes. Thanks to Ozan Yigit.
1.40 millert 87:
88: December 18, 2020:
89: Fix problems converting inf and NaN values in lib.c:is_valid_number.
90: Enhance number to string conversion to do the right thing for
91: NaN and inf values. Things are now pretty much the same as in
92: gawk. (Found a gawk bug while we're at it.) Added a torture
93: test for these values. Thanks to Arnold Robbins. Allows closing
94: of PR #101.
95:
96: December 15, 2020:
97: Merge PR #99, which gets the right header for strcasecmp.
98: Thanks to GitHub user michaelforney.
1.39 millert 99:
100: December 8, 2020:
101: Merge PR #98: Disallow hex data. Allow only +nan, -nan,
102: +inf, -inf (case independent) to give NaN and infinity values.
103: Improve things so that string to double conversion is only
104: done once, yielding something of a speedup. This obviate
105: PR #95. Thanks to Arnold Robbins.
106:
107: December 3, 2020:
108: Fix to argument parsing to avoid printing spurious newlines.
109: Thanks to Todd Miller. Merges PR #97.
110:
111: October 13, 2020:
112: Add casts before all the calls to malloc/calloc/realloc in order
113: to get it to compile with g++. Thanks to Arnold Robbins.
114:
115: August 16, 2020:
116: Additional fixes for DJGPP. Thanks to Eli Zaretskii for
117: the testing.
1.38 millert 118:
119: August 7, 2020:
120: Merge PR #93, which adds casts to (void*) for debug prints
121: using the %p format specifier. Thanks to GitHub user YongHaoWu
122: ("Chris") for the fixes.
123:
124: August 4, 2020:
125: In run.c, use non-restartable multibyte routines to attain
126: portability to DJGPP. Should fix Issue 92. Thanks to Albert Wik
127: for the report and to Todd Miller for the suggested fix.
1.37 millert 128:
129: July 30, 2020:
130: Merge PRs 88-91 which fix small bugs. Thanks to Todd Miller and
131: Tim van der Molen for the fixes.
132:
133: In order to make life easier, we move exclusively to bison
134: as the parser generator.
1.36 millert 135:
136: July 2, 2020:
137: Merge PRs 85 and 86 which fix regressions. Thanks to
138: Tim van der Molen for the fixes.
1.35 millert 139:
140: June 25, 2020:
141: Merge PRs 82 and 84. The latter fixes issue #83. Thanks to
142: Todd Miller and awkfan77.
1.34 millert 143:
144: June 12, 2020:
145: Clear errno before calling errcheck to avoid any spurious errors
146: left over from previous calls that may have set it. Thanks to
147: Todd Miller for the fix, from PR #80.
148:
149: Fix Issue #78 by allowing \r to follow floating point numbers in
150: lib.c:is_number. Thanks to GitHub user ajcarr for the report
151: and to Arnold Robbins for the fix.
1.33 millert 152:
153: June 5, 2020:
154: In fldbld(), make sure that inputFS is set before trying to
155: use it. Thanks to Steffen Nurpmeso <steffen@sdaoden.eu>
156: for the report.
157:
158: May 5, 2020:
159: Fix checks for compilers that can handle noreturn. Thanks to
160: GitHub user enh-google for pointing it out. Closes Issue #79.
161:
162: April 16, 2020:
163: Handle old compilers that don't support C11 (for noreturn).
164: Thanks to Arnold Robbins.
165:
166: April 5, 2020:
167: Use <stdnoreturn.h> and noreturn instead of GCC attributes.
168: Thanks to GitHub user awkfan77. Closes PR #77.
1.30 millert 169:
1.32 millert 170: February 28, 2020:
171: More cleanups from Christos Zoulas: notably backslash continuation
172: inside strings removes the newline and a fix for RS = "^a".
173: Fix for address sanitizer-found problem. Thanks to GitHub user
174: enh-google.
175:
176: February 19, 2020:
177: More small cleanups from Christos Zoulas.
178:
179: February 18, 2020:
180: Additional cleanups from Christos Zoulas. It's no longer necessary
181: to use the -y flag to bison.
182:
183: February 6, 2020:
184: Additional small cleanups from Christos Zoulas. awk is now
185: a little more robust about reporting I/O errors upon exit.
186:
1.31 millert 187: January 31, 2020:
188: Merge PR #70, which avoids use of variable length arrays. Thanks
189: to GitHub user michaelforney. Fix issue #60 ({0} in interval
1.32 millert 190: expressions doesn't work). Also get all tests working again.
191: Thanks to Arnold Robbins.
1.31 millert 192:
193: January 24, 2020:
194: A number of small cleanups from Christos Zoulas. Add the close
195: on exec flag to files/pipes opened for redirection; courtesy of
196: Arnold Robbins.
197:
198: January 19, 2020:
199: If POSIXLY_CORRECT is set in the environment, then sub and gsub
200: use POSIX rules for multiple backslashes. This fixes Issue #66,
201: while maintaining backwards compatibility.
202:
203: January 9, 2020:
204: Input/output errors on closing files are now fatal instead of
205: mere warnings. Thanks to Martijn Dekker <martijn@inlv.org>.
206:
1.30 millert 207: January 5, 2020:
208: Fix a bug in the concatentation of two string constants into
209: one done in the grammar. Fixes GitHub issue #61. Thanks
210: to GitHub user awkfan77 for pointing out the direction for
211: the fix. New test T.concat added to the test suite.
212: Fix a few memory leaks reported by valgrind, as well.
213:
214: December 27, 2019:
215: Fix a bug whereby a{0,3} could match four a's. Thanks to
216: "Anonymous AWK fan" for the report.
217:
218: December 11, 2019:
219: Further printf-related fixes for 32 bit systems.
220: Thanks again to Christos Zoulas.
221:
222: December 8, 2019:
223: Fix the return value of sprintf("%d") on 32 bit systems.
224: Thanks to Jim Lowe for the report and to Christos Zoulas
225: for the fix.
1.29 millert 226:
227: November 10, 2019:
228: Convert a number of Boolean integer variables into
229: actual bools. Convert compile_time variable into an
230: enum and simplify some of the related code. Thanks
231: to Arnold Robbins.
232:
233: November 8, 2019:
234: Fix from Ori Bernstein to get UTF-8 characters instead of
235: bytes when FS = "". This is currently the only bit of
236: the One True Awk that understands multibyte characters.
237: From Arnold Robbins, apply some cleanups in the test suite.
1.28 millert 238:
239: October 25, 2019:
240: More fixes and cleanups from NetBSD, courtesy of Christos
241: Zoulas. Merges PRs 54 and 55.
242:
243: October 24, 2019:
244: Import second round of code cleanups from NetBSD. Much thanks
1.31 millert 245: to Christos Zoulas (GitHub user zoulasc). Merges PR 53.
1.28 millert 246: Add an optimization for string concatenation, also from
247: Christos.
1.27 millert 248:
249: October 17, 2019:
250: Import code cleanups from NetBSD. Much thanks to Christos
1.31 millert 251: Zoulas (GitHub user zoulasc). Merges PR 51.
1.26 millert 252:
253: October 6, 2019:
254: Import code from NetBSD awk that implements RS as a regular
255: expression.
1.23 millert 256:
1.25 millert 257: September 10, 2019:
258: Fixes for various array / memory overruns found via gcc's
1.31 millert 259: -fsanitize=unknown. Thanks to Alexander Richardson (GitHub
1.25 millert 260: user arichardson). Merges PRs 47 and 48.
261:
262: July 28, 2019:
263: Import grammar optimization from NetBSD: Two string constants
264: concatenated together get turned into a single string.
265:
266: July 26, 2019:
267: Support POSIX-specified C-style escape sequences "\a" (alarm)
268: and "\v" (vertical tab) in command line arguments and regular
269: expressions, further to the support for them in strings added on
270: Apr 9, 1989. These now no longer match as literal "a" and "v"
271: characters (as they don't on other awk implementations).
272: Thanks to Martijn Dekker.
273:
274: July 17, 2019:
275: Pull in a number of code cleanups and minor fixes from
276: Warner Losh's bsd-ota branch. The only user visible change
277: is the use of random(3) as the random number generator.
278: Thanks to Warner Losh for collecting all these fixes in
279: one easy place to get them from.
280:
281: July 16, 2019:
282: Fix field splitting to use FS value as of the time a record
283: was read or assigned to. Thanks to GitHub user Cody Mello (melloc)
284: for the fix. (Merged from his branch, via PR #42.) Updated
285: testdir/T.split per said PR as well.
286:
287: June 24, 2019:
288: Extract awktest.tar into testdir directory. Add some very
289: simple mechanics to the makefile for running the tests and
290: for cleaning up. No changes to awk itself.
291:
1.24 millert 292: June 17, 2019:
293: Disallow deleting SYMTAB and its elements, which creates
294: use-after-free bugs. Thanks to GitHub user Cody Mello (melloc)
295: for the fix. (Merged from PR #43.)
296:
297: June 5, 2019:
298: Allow unmatched right parenthesis in a regular expression to
299: be treated literally. Fixes Issue #40. Thanks to GitHub user
300: Warner Losh (bsdimp) for the report. Thanks to Arnold Robbins
301: for the fix.
302:
303: May 29,2019:
304: Fix check for command line arguments to no longer require that
305: first character after '=' not be another '='. Reverts change of
306: August 11, 1989. Thanks to GitHub user Jamie Landeg Jones for
307: pointing out the issue; from Issue #38.
308:
309: Apr 7, 2019:
310: Update awktest.tar(p.50) to use modern options to sort. Needed
311: for Android development. Thanks to GitHub user mohd-akram (Mohamed
312: Akram). From Issue #33.
313:
314: Mar 12, 2019:
315: Added very simplistic support for cross-compiling in the
316: makefile. We are NOT going to go in the direction of the
317: autotools, though. Thanks to GitHub user nee-san for
318: the basic change. (Merged from PR #34.)
319:
1.23 millert 320: Mar 5, 2019:
321: Added support for POSIX-standard interval expressions (a.k.a.
322: bounds, a.k.a. repetition expressions) in regular expressions,
323: backported (via NetBSD) from Apple awk-24 (20070501).
324: Thanks to Martijn Dekker <martijn@inlv.org> for the port.
325: (Merged from PR #30.)
326:
327: Mar 3, 2019:
328: Merge PRs as follows:
329: #12: Avoid undefined behaviour when using ctype(3) functions in
330: relex(). Thanks to GitHub user iamleot.
331: #31: Make getline handle numeric strings, and update FIXES. Thanks
1.47 ! millert 332: to GitHub user Arnold Robbins (arnoldrobbins)
1.23 millert 333: #32: maketab: support build systems with read-only source. Thanks
334: to GitHub user enh.
1.22 millert 335:
336: Jan 25, 2019:
337: Make getline handle numeric strings properly in all cases.
338: (Thanks, Arnold.)
339:
340: Jan 21, 2019:
341: Merged a number of small fixes from GitHub pull requests.
342: Thanks to GitHub users Arnold Robbins (arnoldrobbins),
343: Cody Mello (melloc) and Christoph Junghans (junghans).
344: PR numbers: 13-21, 23, 24, 27.
1.21 millert 345:
346: Oct 25, 2018:
347: Added test in maketab.c to prevent generating a proctab entry
348: for YYSTYPE_IS_DEFINED. It was harmless but some gcc settings
349: generated a warning message. Thanks to Nan Xiao for report.
1.20 millert 350:
351: Aug 27, 2018:
352: Disallow '$' in printf formats; arguments evaluated in order
353: and printed in order.
354:
355: Added some casts to silence warnings on debugging printfs.
356: (Thanks, Arnold.)
1.18 millert 357:
1.19 millert 358: Aug 23, 2018:
359: A long list of fixes courtesy of Arnold Robbins,
360: to whom profound thanks.
361:
362: 1. ofs-rebuild: OFS value used to rebuild the record was incorrect.
363: Fixed August 19, 2014. Revised fix August 2018.
364:
365: 2. system-status: Instead of a floating-point division by 256, use
366: the wait(2) macros to create a reasonable exit status.
367: Fixed March 12, 2016.
368:
369: 3. space: Use provided xisblank() function instead of ispace() for
370: matching [[:blank:]].
371:
372: 4. a-format: Add POSIX standard %a and %A to supported formats. Check
373: at runtime that this format is available.
374:
375: 5. decr-NF: Decrementing NF did not change $0. This is a decades-old
376: bug. There are interactions with the old and new value of OFS as well.
377: Most of the fix came from the NetBSD awk.
378:
379: 6. string-conv: String conversions of scalars were sticky. Once a
380: conversion to string happened, even with OFMT, that value was used until
381: a new numeric value was assigned, even if OFMT differed from CONVFMT,
382: and also if CONVFMT changed.
383:
384: 7. unary-plus: Unary plus on a string constant returned the string.
385: Instead, it should convert the value to numeric and give that value.
386:
387: Also added Arnold's tests for these to awktest.tar as T.arnold.
388:
389: Aug 15, 2018:
390: fixed mangled awktest.tar (thanks, Arnold), posted all
391: current (very minor) fixes to github / onetrueawk
392:
1.18 millert 393: Jun 7, 2018:
394: (yes, a long layoff)
395: Updated some broken tests (beebe.tar, T.lilly)
396: [thanks to Arnold Robbins]
397:
398: Mar 26, 2015:
399: buffer overflow in error reporting; thanks to tobias ulmer
400: and john-mark gurney for spotting it and the fix.
401:
402: Feb 4, 2013:
403: cleaned up a handful of tests that didn't seem to actually
404: test for correct behavior: T.latin1, T.gawk.
405:
406: Jan 5, 2013:
407: added ,NULL initializer to static Cells in run.c; not really
408: needed but cleaner. Thanks to Michael Bombardieri.
1.17 millert 409:
410: Dec 20, 2012:
411: fiddled makefile to get correct yacc and bison flags. pick yacc
412: (linux) or bison (mac) as necessary.
413:
414: added __attribute__((__noreturn__)) to a couple of lines in
415: proto.h, to silence someone's enthusiastic checker.
416:
417: fixed obscure call by value bug in split(a[1],a) reported on
418: 9fans. the management of temporary values is just a mess; i
419: took a shortcut by making an extra string copy. thanks
420: to paul patience and arnold robbins for passing it on and for
421: proposed patches.
422:
423: tiny fiddle in setfval to eliminate -0 results in T.expr, which
424: has irritated me for 20+ years.
1.16 millert 425:
426: Aug 10, 2011:
427: another fix to avoid core dump with delete(ARGV); again, many thanks
428: to ruslan ermilov.
429:
430: Aug 7, 2011:
431: split(s, a, //) now behaves the same as split(s, a, "")
432:
433: Jun 12, 2011:
434: /pat/, \n /pat/ {...} is now legal, though bad style to use.
435:
436: added checks to new -v code that permits -vnospace; thanks to
1.25 millert 437: ruslan ermilov for spotting this and providing the patch.
1.16 millert 438:
439: removed fixed limit on number of open files; thanks to aleksey
1.25 millert 440: cheusov and christos zoulos.
1.16 millert 441:
442: fixed day 1 bug that resurrected deleted elements of ARGV when
443: used as filenames (in lib.c).
444:
445: minor type fiddles to make gcc -Wall -pedantic happier (but not
446: totally so); turned on -fno-strict-aliasing in makefile.
447:
448: May 6, 2011:
449: added #ifdef for isblank.
450: now allows -ffoo as well as -f foo arguments.
451: (thanks, ruslan)
452:
453: May 1, 2011:
454: after advice from todd miller, kevin lo, ruslan ermilov,
455: and arnold robbins, changed srand() to return the previous
456: seed (which is 1 on the first call of srand). the seed is
457: an Awkfloat internally though converted to unsigned int to
1.25 millert 458: pass to the library srand(). thanks, everyone.
1.16 millert 459:
460: fixed a subtle (and i hope low-probability) overflow error
1.25 millert 461: in fldbld, by adding space for one extra \0. thanks to
1.16 millert 462: robert bassett for spotting this one and providing a fix.
463:
464: removed the files related to compilation on windows. i no
465: longer have anything like a current windows environment, so
466: i can't test any of it.
1.15 millert 467:
468: May 23, 2010:
469: fixed long-standing overflow bug in run.c; many thanks to
470: nelson beebe for spotting it and providing the fix.
471:
472: fixed bug that didn't parse -vd=1 properly; thanks to santiago
473: vila for spotting it.
474:
475: Feb 8, 2010:
476: i give up. replaced isblank with isspace in b.c; there are
477: no consistent header files.
478:
479: Nov 26, 2009:
480: fixed a long-standing issue with when FS takes effect. a
481: change to FS is now noticed immediately for subsequent splits.
482:
483: changed the name getline() to awkgetline() to avoid yet another
484: name conflict somewhere.
485:
486: Feb 11, 2009:
487: temporarily for now defined HAS_ISBLANK, since that seems to
488: be the best way through the thicket. isblank arrived in C99,
489: but seems to be arriving at different systems at different
490: times.
491:
492: Oct 8, 2008:
493: fixed typo in b.c that set tmpvec wrongly. no one had ever
494: run into the problem, apparently. thanks to alistair crooks.
1.14 millert 495:
496: Oct 23, 2007:
497: minor fix in lib.c: increase inputFS to 100, change malloc
1.25 millert 498: for fields to n+1.
1.14 millert 499:
500: fixed memory fault caused by out of order test in setsval.
501:
502: thanks to david o'brien, freebsd, for both fixes.
503:
504: May 1, 2007:
505: fiddle in makefile to fix for BSD make; thanks to igor sobrado.
506:
507: Mar 31, 2007:
508: fixed some null pointer refs calling adjbuf.
509:
510: Feb 21, 2007:
511: fixed a bug in matching the null RE in sub and gsub. thanks to al aho
512: who actually did the fix (in b.c), and to wolfgang seeberg for finding
513: it and providing a very compact test case.
514:
515: fixed quotation in b.c; thanks to Hal Pratt and the Princeton Dante
516: Project.
517:
518: removed some no-effect asserts in run.c.
519:
520: fiddled maketab.c to not complain about bison-generated values.
521:
522: removed the obsolete -V argument; fixed --version to print the
523: version and exit.
524:
525: fixed wording and an outright error in the usage message; thanks to igor
526: sobrado and jason mcintyre.
527:
528: fixed a bug in -d that caused core dump if no program followed.
529:
530: Jan 1, 2007:
531: dropped mac.code from makefile; there are few non-MacOSX
532: mac's these days.
533:
534: Jan 17, 2006:
535: system() not flagged as unsafe in the unadvertised -safe option.
536: found it while enhancing tests before shipping the ;login: article.
537: practice what you preach.
538:
539: removed the 9-years-obsolete -mr and -mf flags.
540:
541: added -version and --version options.
542:
543: core dump on linux with BEGIN {nextfile}, now fixed.
544:
1.25 millert 545: removed some #ifdef's in run.c and lex.c that appear to no
1.14 millert 546: longer be necessary.
547:
548: Apr 24, 2005:
549: modified lib.c so that values of $0 et al are preserved in the END
550: block, apparently as required by posix. thanks to havard eidnes
551: for the report and code.
552:
553: Jan 14, 2005:
554: fixed infinite loop in parsing, originally found by brian tsang.
555: thanks to arnold robbins for a suggestion that started me
556: rethinking it.
557:
558: Dec 31, 2004:
1.25 millert 559: prevent overflow of -f array in main, head off potential error in
560: call of SYNTAX(), test malloc return in lib.c, all with thanks to
1.14 millert 561: todd miller.
1.13 millert 562:
563: Dec 22, 2004:
564: cranked up size of NCHARS; coverity thinks it can be overrun with
565: smaller size, and i think that's right. added some assertions to b.c
566: to catch places where it might overrun. the RE code is still fragile.
567:
568: Dec 5, 2004:
569: fixed a couple of overflow problems with ridiculous field numbers:
570: e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas
571: and david o'brien at freebsd.org for patches. this really should
572: be re-done from scratch.
573:
574: Nov 21, 2004:
575: fixed another 25-year-old RE bug, in split. it's another failure
576: to (re-)initialize. thanks to steve fisher for spotting this and
577: providing a good test case.
578:
579: Nov 22, 2003:
580: fixed a bug in regular expressions that dates (so help me) from 1977;
581: it's been there from the beginning. an anchored longest match that
582: was longer than the number of states triggered a failure to initialize
583: the machine properly. many thanks to moinak ghosh for not only finding
584: this one but for providing a fix, in some of the most mysterious
585: code known to man.
586:
587: fixed a storage leak in call() that appears to have been there since
1.25 millert 588: 1983 or so -- a function without an explicit return that assigns a
589: string to a parameter leaked a Cell. thanks to moinak ghosh for
1.13 millert 590: spotting this very subtle one.
591:
592: Jul 31, 2003:
593: fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
594: that mis-handled the character 255 in input. (it was being compared
595: to EOF with a signed comparison.)
596:
597: Jul 29, 2003:
598: fixed (i think) the long-standing botch that included the beginning of
599: line state ^ for RE's in the set of valid characters; this led to a
600: variety of odd problems, including failure to properly match certain
601: regular expressions in non-US locales. thanks to ruslan for keeping
602: at this one.
603:
604: Jul 28, 2003:
605: n-th try at getting internationalization right, with thanks to volker
606: kiefel, arnold robbins and ruslan ermilov for advice, though they
607: should not be blamed for the outcome. according to posix, "." is the
608: radix character in programs and command line arguments regardless of
609: the locale; otherwise, the locale should prevail for input and output
610: of numbers. so it's intended to work that way.
1.25 millert 611:
1.13 millert 612: i have rescinded the attempt to use strcoll in expanding shorthands in
613: regular expressions (cclenter). its properties are much too
614: surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
615: in locale fr_CA. i can see how this might arise by implementation
616: but i cannot explain it to a human user. (this behavior can be seen
617: in gawk as well; we're leaning on the same library.)
618:
619: the issue appears to be that strcoll is meant for sorting, where
620: merging upper and lower case may make sense (though note that unix
621: sort does not do this by default either). it is not appropriate
622: for regular expressions, where the goal is to match specific
623: patterns of characters. in any case, the notations [:lower:], etc.,
624: are available in awk, and they are more likely to work correctly in
625: most locales.
626:
627: a moratorium is hereby declared on internationalization changes.
628: i apologize to friends and colleagues in other parts of the world.
629: i would truly like to get this "right", but i don't know what
630: that is, and i do not want to keep making changes until it's clear.
631:
632: Jul 4, 2003:
633: fixed bug that permitted non-terminated RE, as in "awk /x".
634:
635: Jun 1, 2003:
636: subtle change to split: if source is empty, number of elems
637: is always 0 and the array is not set.
638:
639: Mar 21, 2003:
640: added some parens to isblank, in another attempt to make things
641: internationally portable.
642:
643: Mar 14, 2003:
644: the internationalization changes, somewhat modified, are now
645: reinstated. in theory awk will now do character comparisons
646: and case conversions in national language, but "." will always
647: be the decimal point separator on input and output regardless
648: of national language. isblank(){} has an #ifndef.
649:
650: this no longer compiles on windows: LC_MESSAGES isn't defined
651: in vc6++.
652:
653: fixed subtle behavior in field and record splitting: if FS is
654: a single character and RS is not empty, \n is NOT a separator.
655: this tortuous reading is found in the awk book; behavior now
656: matches gawk and mawk.
1.11 millert 657:
658: Dec 13, 2002:
659: for the moment, the internationalization changes of nov 29 are
660: rolled back -- programs like x = 1.2 don't work in some locales,
661: because the parser is expecting x = 1,2. until i understand this
662: better, this will have to wait.
663:
664: Nov 29, 2002:
665: modified b.c (with tiny changes in main and run) to support
666: locales, using strcoll and iswhatever tests for posix character
667: classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
668: the function isblank doesn't seem to have propagated to any
669: header file near me, so it's there explicitly. not properly
670: tested on non-ascii character sets by me.
671:
672: Jun 28, 2002:
673: modified run/format() and tran/getsval() to do a slightly better
674: job on using OFMT for output from print and CONVFMT for other
1.25 millert 675: number->string conversions, as promised by posix and done by
1.11 millert 676: gawk and mawk. there are still places where it doesn't work
677: right if CONVFMT is changed; by then the STR attribute of the
678: variable has been irrevocably set. thanks to arnold robbins for
679: code and examples.
680:
681: fixed subtle bug in format that could get core dump. thanks to
682: Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
683: minor cleanup in run.c / format() at the same time.
684:
685: added some tests for null pointers to debugging printf's, which
686: were never intended for external consumption. thanks to dave
687: kerns (dkerns@lucent.com) for pointing this out.
688:
689: GNU compatibility: an empty regexp matches anything (thanks to
690: dag-erling smorgrav, des@ofug.org). subject to reversion if
691: this does more harm than good.
692:
693: pervasive small changes to make things more const-correct, as
694: reported by gcc's -Wwrite-strings. as it says in the gcc manual,
695: this may be more nuisance than useful. provoked by a suggestion
696: and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
697:
698: minor documentation changes to note that this now compiles out
699: of the box on Mac OS X.
700:
701: Feb 10, 2002:
702: changed types in posix chars structure to quiet solaris cc.
703:
704: Jan 1, 2002:
705: fflush() or fflush("") flushes all files and pipes.
706:
1.25 millert 707: length(arrayname) returns number of elements; thanks to
1.11 millert 708: arnold robbins for suggestion.
709:
710: added a makefile.win to make it easier to build on windows.
711: based on dan allen's buildwin.bat.
712:
713: Nov 16, 2001:
714: added support for posix character class names like [:digit:],
715: which are not exactly shorter than [0-9] and perhaps no more
716: portable. thanks to dag-erling smorgrav for code.
717:
718: Feb 16, 2001:
719: removed -m option; no longer needed, and it was actually
720: broken (noted thanks to volker kiefel).
721:
722: Feb 10, 2001:
723: fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
724: and period was accepted as a valid number if it started with a period.
725: this would never have happened with the lex version.
726:
727: other 1-character botches, now fixed, include a bare $ and a
728: bare " at the end of the input.
729:
730: Feb 7, 2001:
731: more (const char *) casts in b.c and tran.c to silence warnings.
1.8 millert 732:
1.10 millert 733: Nov 15, 2000:
734: fixed a bug introduced in august 1997 that caused expressions
735: like $f[1] to be syntax errors. thanks to arnold robbins for
736: noticing this and providing a fix.
737:
738: Oct 30, 2000:
739: fixed some nextfile bugs: not handling all cases. thanks to
740: arnold robbins for pointing this out. new regressions added.
741:
742: close() is now a function. it returns whatever the library
743: fclose returns, and -1 for closing a file or pipe that wasn't
744: opened.
745:
746: Sep 24, 2000:
747: permit \n explicitly in character classes; won't work right
748: if comes in as "[\n]" but ok as /[\n]/, because of multiple
749: processing of \'s. thanks to arnold robbins.
750:
751: July 5, 2000:
752: minor fiddles in tran.c to keep compilers happy about uschar.
753: thanks to norman wilson.
754:
755: May 25, 2000:
756: yet another attempt at making 8-bit input work, with another
1.25 millert 757: band-aid in b.c (member()), and some (uschar) casts to head
1.10 millert 758: off potential errors in subscripts (like isdigit). also
759: changed HAT to NCHARS-2. thanks again to santiago vila.
760:
761: changed maketab.c to ignore apparently out of range definitions
762: instead of halting; new freeBSD generates one. thanks to
763: jon snader <jsnader@ix.netcom.com> for pointing out the problem.
764:
765: May 2, 2000:
766: fixed an 8-bit problem in b.c by making several char*'s into
767: unsigned char*'s. not clear i have them all yet. thanks to
768: Santiago Vila <sanvila@unex.es> for the bug report.
769:
770: Apr 21, 2000:
771: finally found and fixed a memory leak in function call; it's
772: been there since functions were added ~1983. thanks to
773: jon bentley for the test case that found it.
774:
775: added test in envinit to catch environment "variables" with
1.12 otto 776: names beginning with '='; thanks to Berend Hasselman.
1.10 millert 777:
778: Jul 28, 1999:
779: added test in defn() to catch function foo(foo), which
780: otherwise recurses until core dump. thanks to arnold
781: robbins for noticing this.
782:
1.9 millert 783: Jun 20, 1999:
784: added *bp in gettok in lex.c; appears possible to exit function
785: without terminating the string. thanks to russ cox.
786:
787: Jun 2, 1999:
788: added function stdinit() to run to initialize files[] array,
789: in case stdin, etc., are not constants; some compilers care.
790:
791: May 10, 1999:
792: replaced the ERROR ... FATAL, etc., macros with functions
793: based on vprintf, to avoid problems caused by overrunning
794: fixed-size errbuf array. thanks to ralph corderoy for the
795: impetus, and for pointing out a string termination bug in
796: qstring as well.
797:
798: Apr 21, 1999:
799: fixed bug that caused occasional core dumps with commandline
800: variable with value ending in \. (thanks to nelson beebe for
801: the test case.)
802:
1.8 millert 803: Apr 16, 1999:
1.25 millert 804: with code kindly provided by Bruce Lilly, awk now parses
1.8 millert 805: /=/ and similar constructs more sensibly in more places.
1.10 millert 806: Bruce also provided some helpful test cases.
1.8 millert 807:
808: Apr 5, 1999:
809: changed true/false to True/False in run.c to make it
810: easier to compile with C++. Added some casts on malloc
811: and realloc to be honest about casts; ditto. changed
812: ltype int to long in struct rrow to reduce some 64-bit
813: complaints; other changes scattered throughout for the
814: same purpose. thanks to Nelson Beebe for these portability
815: improvements.
816:
817: removed some horrible pointer-int casting in b.c and elsewhere
818: by adding ptoi and itonp to localize the casts, which are
819: all benign. fixed one incipient bug that showed up on sgi
820: in 64-bit mode.
821:
822: reset lineno for new source file; include filename in error
823: message. also fixed line number error in continuation lines.
824: (thanks to Nelson Beebe for both of these.)
825:
826: Mar 24, 1999:
827: Nelson Beebe notes that irix 5.3 yacc dies with a bogus
828: error; use a newer version or switch to bison, since sgi
829: is unlikely to fix it.
1.1 tholo 830:
1.7 millert 831: Mar 5, 1999:
1.9 millert 832: changed isnumber to is_number to avoid the problem caused by
833: versions of ctype.h that include the name isnumber.
1.7 millert 834:
835: distribution now includes a script for building on a Mac,
836: thanks to Dan Allen.
837:
838: Feb 20, 1999:
839: fixed memory leaks in run.c (call) and tran.c (setfval).
840: thanks to Stephen Nutt for finding these and providing the fixes.
841:
842: Jan 13, 1999:
843: replaced srand argument by (unsigned int) in run.c;
844: avoids problem on Mac and potentially on Unix & Windows.
845: thanks to Dan Allen.
846:
847: added a few (int) casts to silence useless compiler warnings.
848: e.g., errorflag= in run.c jump().
849:
850: added proctab.c to the bundle outout; one less thing
851: to have to compile out of the box.
852:
853: added calls to _popen and _pclose to the win95 stub for
854: pipes (thanks to Steve Adams for this helpful suggestion).
855: seems to work, though properties are not well understood
856: by me, and it appears that under some circumstances the
857: pipe output is truncated. Be careful.
858:
859: Oct 19, 1998:
860: fixed a couple of bugs in getrec: could fail to update $0
1.25 millert 861: after a getline var; because inputFS wasn't initialized,
1.7 millert 862: could split $0 on every character, a misleading diversion.
863:
864: fixed caching bug in makedfa: LRU was actually removing
865: least often used.
866:
867: thanks to ross ridge for finding these, and for providing
868: great bug reports.
869:
870: May 12, 1998:
871: fixed potential bug in readrec: might fail to update record
872: pointer after growing. thanks to dan levy for spotting this
873: and suggesting the fix.
874:
875: Mar 12, 1998:
876: added -V to print version number and die.
1.19 millert 877:
878: [notify dave kerns, dkerns@dacsoup.ih.lucent.com]
1.7 millert 879:
880: Feb 11, 1998:
881: subtle silent bug in lex.c: if the program ended with a number
882: longer than 1 digit, part of the input would be pushed back and
883: parsed again because token buffer wasn't terminated right.
884: example: awk 'length($0) > 10'. blush. at least i found it
885: myself.
886:
887: Aug 31, 1997:
888: s/adelete/awkdelete/: SGI uses this in malloc.h.
889: thanks to nelson beebe for pointing this one out.
890:
891: Aug 21, 1997:
892: fixed some bugs in sub and gsub when replacement includes \\.
893: this is a dark, horrible corner, but at least now i believe that
894: the behavior is the same as gawk and the intended posix standard.
895: thanks to arnold robbins for advice here.
896:
897: Aug 9, 1997:
898: somewhat regretfully, replaced the ancient lex-based lexical
899: analyzer with one written in C. it's longer, generates less code,
900: and more portable; the old one depended too much on mysterious
901: properties of lex that were not preserved in other environments.
902: in theory these recognize the same language.
903:
904: now using strtod to test whether a string is a number, instead of
905: the convoluted original function. should be more portable and
906: reliable if strtod is implemented right.
907:
908: removed now-pointless optimization in makefile that tries to avoid
909: recompilation when awkgram.y is changed but symbols are not.
910:
911: removed most fixed-size arrays, though a handful remain, some
912: of which are unchecked. you have been warned.
913:
914: Aug 4, 1997:
915: with some trepidation, replaced the ancient code that managed
916: fields and $0 in fixed-size arrays with arrays that grow on
917: demand. there is still some tension between trying to make this
918: run fast and making it clean; not sure it's right yet.
919:
920: the ill-conceived -mr and -mf arguments are now useful only
921: for debugging. previous dynamic string code removed.
922:
923: numerous other minor cleanups along the way.
1.1 tholo 924:
1.7 millert 925: Jul 30, 1997:
926: using code provided by dan levy (to whom profuse thanks), replaced
927: fixed-size arrays and awkward kludges by a fairly uniform mechanism
928: to grow arrays as needed for printf, sub, gsub, etc.
1.1 tholo 929:
1.7 millert 930: Jul 23, 1997:
931: falling off the end of a function returns "" and 0, not 0.
932: thanks to arnold robbins.
1.1 tholo 933:
1.7 millert 934: Jun 17, 1997:
935: replaced several fixed-size arrays by dynamically-created ones
936: in run.c; added overflow tests to some previously unchecked cases.
937: getline, toupper, tolower.
1.1 tholo 938:
1.7 millert 939: getline code is still broken in that recursive calls may wind
940: up using the same space. [fixed later]
1.1 tholo 941:
1.7 millert 942: increased RECSIZE to 8192 to push problems further over the horizon.
1.1 tholo 943:
1.7 millert 944: added \r to \n as input line separator for programs, not data.
945: damn CRLFs.
1.1 tholo 946:
1.7 millert 947: modified format() to permit explicit printf("%c", 0) to include
948: a null byte in output. thanks to ken stailey for the fix.
1.1 tholo 949:
1.7 millert 950: added a "-safe" argument that disables file output (print >,
951: print >>), process creation (cmd|getline, print |, system), and
952: access to the environment (ENVIRON). this is a first approximation
953: to a "safe" version of awk, but don't rely on it too much. thanks
954: to joan feigenbaum and matt blaze for the inspiration long ago.
1.1 tholo 955:
1.7 millert 956: Jul 8, 1996:
957: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
958: ralph corderoy.
1.1 tholo 959:
1.7 millert 960: Jun 29, 1996:
961: fixed awful bug in new field splitting; didn't get all the places
962: where input was done.
1.1 tholo 963:
1.7 millert 964: Jun 28, 1996:
965: changed field-splitting to conform to posix definition: fields are
966: split using the value of FS at the time of input; it used to be
967: the value when the field or NF was first referred to, a much less
968: predictable definition. thanks to arnold robbins for encouragement
969: to do the right thing.
1.1 tholo 970:
1.7 millert 971: May 28, 1996:
972: fixed appalling but apparently unimportant bug in parsing octal
973: numbers in reg exprs.
1.1 tholo 974:
1.7 millert 975: explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
1.1 tholo 976:
1.7 millert 977: May 27, 1996:
978: cleaned up some declarations so gcc -Wall is now almost silent.
1.1 tholo 979:
1.7 millert 980: makefile now includes backup copies of ytab.c and lexyy.c in case
981: one makes before looking; it also avoids recreating lexyy.c unless
982: really needed.
1.1 tholo 983:
1.7 millert 984: s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
985: with unwisely-written header files.
1.1 tholo 986:
1.7 millert 987: thanks to jeffrey friedl for several of these.
1.1 tholo 988:
1.7 millert 989: May 26, 1996:
990: an attempt to rationalize the (unsigned) char issue. almost all
991: instances of unsigned char have been removed; the handful of places
992: in b.c where chars are used as table indices have been hand-crafted.
993: added some latin-1 tests to the regression, but i'm not confident;
994: none of my compilers seem to care much. thanks to nelson beebe for
995: pointing out some others that do care.
1.1 tholo 996:
1.7 millert 997: May 2, 1996:
998: removed all register declarations.
1.1 tholo 999:
1.7 millert 1000: enhanced split(), as in gawk, etc: split(s, a, "") splits s into
1001: a[1]...a[length(s)] with each character a single element.
1.1 tholo 1002:
1.7 millert 1003: made the same changes for field-splitting if FS is "".
1.1 tholo 1004:
1.7 millert 1005: added nextfile, as in gawk: causes immediate advance to next
1006: input file. (thanks to arnold robbins for inspiration and code).
1.1 tholo 1007:
1.7 millert 1008: small fixes to regexpr code: can now handle []], [[], and
1.25 millert 1009: variants; [] is now a syntax error, rather than matching
1.7 millert 1010: everything; [z-a] is now empty, not z. far from complete
1011: or correct, however. (thanks to jeffrey friedl for pointing out
1012: some awful behaviors.)
1.1 tholo 1013:
1.7 millert 1014: Apr 29, 1996:
1.12 otto 1015: replaced uchar by uschar everywhere; apparently some compilers
1.7 millert 1016: usurp this name and this causes conflicts.
1.1 tholo 1017:
1.7 millert 1018: fixed call to time in run.c (bltin); arg is time_t *.
1.1 tholo 1019:
1.7 millert 1020: replaced horrible pointer/long punning in b.c by a legitimate
1021: union. should be safer on 64-bit machines and cleaner everywhere.
1022: (thanks to nelson beebe for pointing out some of these problems.)
1.1 tholo 1023:
1.7 millert 1024: replaced nested comments by #if 0...#endif in run.c, lib.c.
1.1 tholo 1025:
1.7 millert 1026: removed getsval, setsval, execute macros from run.c and lib.c.
1027: machines are 100x faster than they were when these macros were
1028: first used.
1.1 tholo 1029:
1.7 millert 1030: revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
1031: y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
1032: portability to nameless systems.
1.1 tholo 1033:
1.7 millert 1034: "make bundle" now includes yacc and lex output files for recipients
1035: who don't have yacc or lex.
1.1 tholo 1036:
1.7 millert 1037: Aug 15, 1995:
1038: initialized Cells in setsymtab more carefully; some fields
1039: were not set. (thanks to purify, all of whose complaints i
1040: think i now understand.)
1.1 tholo 1041:
1.7 millert 1042: fixed at least one error in gsub that looked at -1-th element
1043: of an array when substituting for a null match (e.g., $).
1.1 tholo 1044:
1.7 millert 1045: delete arrayname is now legal; it clears the elements but leaves
1046: the array, which may not be the right behavior.
1.1 tholo 1047:
1.7 millert 1048: modified makefile: my current make can't cope with the test used
1049: to avoid unnecessary yacc invocations.
1.1 tholo 1050:
1.7 millert 1051: Jul 17, 1995:
1052: added dynamically growing strings to awk.lx.l and b.c
1053: to permit regular expressions to be much bigger.
1054: the state arrays can still overflow.
1.1 tholo 1055:
1.7 millert 1056: Aug 24, 1994:
1057: detect duplicate arguments in function definitions (mdm).
1.1 tholo 1058:
1.7 millert 1059: May 11, 1994:
1060: trivial fix to printf to limit string size in sub().
1.1 tholo 1061:
1.7 millert 1062: Apr 22, 1994:
1063: fixed yet another subtle self-assignment problem:
1064: $1 = $2; $1 = $1 clobbered $1.
1.1 tholo 1065:
1.7 millert 1066: Regression tests now use private echo, to avoid quoting problems.
1.1 tholo 1067:
1.7 millert 1068: Feb 2, 1994:
1069: changed error() to print line number as %d, not %g.
1.1 tholo 1070:
1.7 millert 1071: Jul 23, 1993:
1072: cosmetic changes: increased sizes of some arrays,
1073: reworded some error messages.
1.1 tholo 1074:
1.7 millert 1075: added CONVFMT as in posix (just replaced OFMT in getsval)
1.1 tholo 1076:
1.7 millert 1077: FILENAME is now "" until the first thing that causes a file
1078: to be opened.
1.1 tholo 1079:
1.7 millert 1080: Nov 28, 1992:
1081: deleted yyunput and yyoutput from proto.h;
1082: different versions of lex give these different declarations.
1.1 tholo 1083:
1.7 millert 1084: May 31, 1992:
1085: added -mr N and -mf N options: more record and fields.
1086: these really ought to adjust automatically.
1.1 tholo 1087:
1.7 millert 1088: cleaned up some error messages; "out of space" now means
1089: malloc returned NULL in all cases.
1.1 tholo 1090:
1.7 millert 1091: changed rehash so that if it runs out, it just returns;
1092: things will continue to run slow, but maybe a bit longer.
1.1 tholo 1093:
1.7 millert 1094: Apr 24, 1992:
1095: remove redundant close of stdin when using -f -.
1.1 tholo 1096:
1.7 millert 1097: got rid of core dump with -d; awk -d just prints date.
1.1 tholo 1098:
1.7 millert 1099: Apr 12, 1992:
1100: added explicit check for /dev/std(in,out,err) in redirection.
1101: unlike gawk, no /dev/fd/n yet.
1.1 tholo 1102:
1.7 millert 1103: added (file/pipe) builtin. hard to test satisfactorily.
1104: not posix.
1.1 tholo 1105:
1.7 millert 1106: Feb 20, 1992:
1107: recompile after abortive changes; should be unchanged.
1.1 tholo 1108:
1.7 millert 1109: Dec 2, 1991:
1110: die-casting time: converted to ansi C, installed that.
1.1 tholo 1111:
1.7 millert 1112: Nov 30, 1991:
1113: fixed storage leak in freefa, failing to recover [N]CCL.
1114: thanks to Bill Jones (jones@cs.usask.ca)
1.1 tholo 1115:
1.7 millert 1116: Nov 19, 1991:
1117: use RAND_MAX instead of literal in builtin().
1.1 tholo 1118:
1.7 millert 1119: Nov 12, 1991:
1120: cranked up some fixed-size arrays in b.c, and added a test for
1121: overflow in penter. thanks to mark larsen.
1.1 tholo 1122:
1.7 millert 1123: Sep 24, 1991:
1124: increased buffer in gsub. a very crude fix to a general problem.
1125: and again on Sep 26.
1.1 tholo 1126:
1.7 millert 1127: Aug 18, 1991:
1128: enforce variable name syntax for commandline variables: has to
1129: start with letter or _.
1.1 tholo 1130:
1.7 millert 1131: Jul 27, 1991:
1132: allow newline after ; in for statements.
1.1 tholo 1133:
1.7 millert 1134: Jul 21, 1991:
1135: fixed so that in self-assignment like $1=$1, side effects
1136: like recomputing $0 take place. (this is getting subtle.)
1.1 tholo 1137:
1.7 millert 1138: Jun 30, 1991:
1139: better test for detecting too-long output record.
1.1 tholo 1140:
1.7 millert 1141: Jun 2, 1991:
1142: better defense against very long printf strings.
1143: made break and continue illegal outside of loops.
1.1 tholo 1144:
1.7 millert 1145: May 13, 1991:
1146: removed extra arg on gettemp, tempfree. minor error message rewording.
1.1 tholo 1147:
1148: May 6, 1991:
1149: fixed silly bug in hex parsing in hexstr().
1150: removed an apparently unnecessary test in isnumber().
1151: warn about weird printf conversions.
1152: fixed unchecked array overwrite in relex().
1153:
1154: changed for (i in array) to access elements in sorted order.
1155: then unchanged it -- it really does run slower in too many cases.
1156: left the code in place, commented out.
1157:
1.7 millert 1158: Feb 10, 1991:
1159: check error status on all writes, to avoid banging on full disks.
1.1 tholo 1160:
1.7 millert 1161: Jan 28, 1991:
1162: awk -f - reads the program from stdin.
1.1 tholo 1163:
1.7 millert 1164: Jan 11, 1991:
1165: failed to set numeric state on $0 in cmd|getline context in run.c.
1.1 tholo 1166:
1.7 millert 1167: Nov 2, 1990:
1168: fixed sleazy test for integrality in getsval; use modf.
1.1 tholo 1169:
1.7 millert 1170: Oct 29, 1990:
1171: fixed sleazy buggy code in lib.c that looked (incorrectly) for
1172: too long input lines.
1.1 tholo 1173:
1.7 millert 1174: Oct 14, 1990:
1175: fixed the bug on p. 198 in which it couldn't deduce that an
1176: argument was an array in some contexts. replaced the error
1177: message in intest() by code that damn well makes it an array.
1.1 tholo 1178:
1.7 millert 1179: Oct 8, 1990:
1180: fixed horrible bug: types and values were not preserved in
1181: some kinds of self-assignment. (in assign().)
1.1 tholo 1182:
1.7 millert 1183: Aug 24, 1990:
1184: changed NCHARS to 256 to handle 8-bit characters in strings
1185: presented to match(), etc.
1.1 tholo 1186:
1.7 millert 1187: Jun 26, 1990:
1188: changed struct rrow (awk.h) to use long instead of int for lval,
1189: since cfoll() stores a pointer in it. now works better when int's
1190: are smaller than pointers!
1.1 tholo 1191:
1.7 millert 1192: May 6, 1990:
1193: AVA fixed the grammar so that ! is uniformly of the same precedence as
1194: unary + and -. This renders illegal some constructs like !x=y, which
1195: now has to be parenthesized as !(x=y), and makes others work properly:
1196: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements.
1197: (These problems were pointed out by Bob Lenk of Posix.)
1.1 tholo 1198:
1.7 millert 1199: Added \x to regular expressions (already in strings).
1200: Limited octal to octal digits; \8 and \9 are not octal.
1201: Centralized the code for parsing escapes in regular expressions.
1202: Added a bunch of tests to T.re and T.sub to verify some of this.
1.1 tholo 1203:
1.7 millert 1204: Feb 9, 1990:
1205: fixed null pointer dereference bug in main.c: -F[nothing]. sigh.
1.1 tholo 1206:
1.7 millert 1207: restored srand behavior: it returns the current seed.
1.1 tholo 1208:
1.7 millert 1209: Jan 18, 1990:
1210: srand now returns previous seed value (0 to start).
1.1 tholo 1211:
1.7 millert 1212: Jan 5, 1990:
1213: fix potential problem in tran.c -- something was freed,
1214: then used in freesymtab.
1.1 tholo 1215:
1.7 millert 1216: Oct 18, 1989:
1217: another try to get the max number of open files set with
1218: relatively machine-independent code.
1.1 tholo 1219:
1.7 millert 1220: small fix to input() in case of multiple reads after EOF.
1.1 tholo 1221:
1.7 millert 1222: Oct 11, 1989:
1223: FILENAME is now defined in the BEGIN block -- too many old
1224: programs broke.
1.1 tholo 1225:
1.7 millert 1226: "-" means stdin in getline as well as on the commandline.
1.1 tholo 1227:
1.7 millert 1228: added a bunch of casts to the code to tell the truth about
1229: char * vs. unsigned char *, a right royal pain. added a
1230: setlocale call to the front of main, though probably no one
1231: has it usefully implemented yet.
1.1 tholo 1232:
1.7 millert 1233: Aug 24, 1989:
1234: removed redundant relational tests against nullnode if parse
1235: tree already had a relational at that point.
1.1 tholo 1236:
1.7 millert 1237: Aug 11, 1989:
1238: fixed bug: commandline variable assignment has to look like
1239: var=something. (consider the man page for =, in file =.1)
1.1 tholo 1240:
1.7 millert 1241: changed number of arguments to functions to static arrays
1242: to avoid repeated malloc calls.
1.1 tholo 1243:
1.7 millert 1244: Aug 2, 1989:
1245: restored -F (space) separator
1.1 tholo 1246:
1.7 millert 1247: Jul 30, 1989:
1248: added -v x=1 y=2 ... for immediate commandline variable assignment;
1249: done before the BEGIN block for sure. they have to precede the
1250: program if the program is on the commandline.
1251: Modified Aug 2 to require a separate -v for each assignment.
1.1 tholo 1252:
1.7 millert 1253: Jul 10, 1989:
1254: fixed ref-thru-zero bug in environment code in tran.c
1.1 tholo 1255:
1.7 millert 1256: Jun 23, 1989:
1257: add newline to usage message.
1.1 tholo 1258:
1.7 millert 1259: Jun 14, 1989:
1260: added some missing ansi printf conversion letters: %i %X %E %G.
1261: no sensible meaning for h or L, so they may not do what one expects.
1.1 tholo 1262:
1.7 millert 1263: made %* conversions work.
1.1 tholo 1264:
1.7 millert 1265: changed x^y so that if n is a positive integer, it's done
1266: by explicit multiplication, thus achieving maximum accuracy.
1267: (this should be done by pow() but it seems not to be locally.)
1268: done to x ^= y as well.
1.1 tholo 1269:
1.7 millert 1270: Jun 4, 1989:
1271: ENVIRON array contains environment: if shell variable V=thing,
1272: ENVIRON["V"] is "thing"
1.1 tholo 1273:
1.7 millert 1274: multiple -f arguments permitted. error reporting is naive.
1275: (they were permitted before, but only the last was used.)
1.1 tholo 1276:
1.7 millert 1277: fixed a really stupid botch in the debugging macro dprintf
1.1 tholo 1278:
1.7 millert 1279: fixed order of evaluation of commandline assignments to match
1280: what the book claims: an argument of the form x=e is evaluated
1281: at the time it would have been opened if it were a filename (p 63).
1282: this invalidates the suggested answer to ex 4-1 (p 195).
1.1 tholo 1283:
1.7 millert 1284: removed some code that permitted -F (space) fieldseparator,
1285: since it didn't quite work right anyway. (restored aug 2)
1.1 tholo 1286:
1.7 millert 1287: Apr 27, 1989:
1288: Line number now accumulated correctly for comment lines.
1.1 tholo 1289:
1.7 millert 1290: Apr 26, 1989:
1291: Debugging output now includes a version date,
1292: if one compiles it into the source each time.
1.1 tholo 1293:
1.7 millert 1294: Apr 9, 1989:
1295: Changed grammar to prohibit constants as 3rd arg of sub and gsub;
1296: prevents class of overwriting-a-constant errors. (Last one?)
1297: This invalidates the "banana" example on page 43 of the book.
1.1 tholo 1298:
1.7 millert 1299: Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal),
1300: as in ANSI, for strings. Rescinded the sloppiness that permitted
1301: non-octal digits in \ooo. Warning: not all compilers and libraries
1302: will be able to deal with \x correctly.
1.1 tholo 1303:
1.7 millert 1304: Jan 9, 1989:
1305: Fixed bug that caused tempcell list to contain a duplicate.
1306: The fix is kludgy.
1.1 tholo 1307:
1.7 millert 1308: Dec 17, 1988:
1309: Catches some more commandline errors in main.
1310: Removed redundant decl of modf in run.c (confuses some compilers).
1311: Warning: there's no single declaration of malloc, etc., in awk.h
1312: that seems to satisfy all compilers.
1.1 tholo 1313:
1.7 millert 1314: Dec 7, 1988:
1315: Added a bit of code to error printing to avoid printing nulls.
1316: (Not clear that it actually would.)
1.1 tholo 1317:
1.7 millert 1318: Nov 27, 1988:
1319: With fear and trembling, modified the grammar to permit
1320: multiple pattern-action statements on one line without
1321: an explicit separator. By definition, this capitulation
1322: to the ghost of ancient implementations remains undefined
1323: and thus subject to change without notice or apology.
1324: DO NOT COUNT ON IT.
1.1 tholo 1325:
1.7 millert 1326: Oct 30, 1988:
1327: Fixed bug in call() that failed to recover storage.
1.1 tholo 1328:
1.7 millert 1329: A warning is now generated if there are more arguments
1330: in the call than in the definition (in lieu of fixing
1331: another storage leak).
1.2 millert 1332:
1.7 millert 1333: Oct 20, 1988:
1334: Fixed %c: if expr is numeric, use numeric value;
1335: otherwise print 1st char of string value. still
1336: doesn't work if the value is 0 -- won't print \0.
1.2 millert 1337:
1.7 millert 1338: Added a few more checks for running out of malloc.
1.2 millert 1339:
1.7 millert 1340: Oct 12, 1988:
1341: Fixed bug in call() that freed local arrays twice.
1.5 kstailey 1342:
1.7 millert 1343: Fixed to handle deletion of non-existent array right;
1344: complains about attempt to delete non-array element.
1.6 kstailey 1345:
1.7 millert 1346: Sep 30, 1988:
1347: Now guarantees to evaluate all arguments of built-in
1348: functions, as in C; the appearance is that arguments
1349: are evaluated before the function is called. Places
1350: affected are sub (gsub was ok), substr, printf, and
1351: all the built-in arithmetic functions in bltin().
1352: A warning is generated if a bltin() is called with
1353: the wrong number of arguments.
1.6 kstailey 1354:
1.7 millert 1355: This requires changing makeprof on p167 of the book.
1.6 kstailey 1356:
1.7 millert 1357: Aug 23, 1988:
1358: setting FILENAME in BEGIN caused core dump, apparently
1359: because it was freeing space not allocated by malloc.
1.6 kstailey 1360:
1.7 millert 1361: July 24, 1988:
1362: fixed egregious error in toupper/tolower functions.
1363: still subject to rescinding, however.
1.6 kstailey 1364:
1.7 millert 1365: July 2, 1988:
1366: flush stdout before opening file or pipe
1.6 kstailey 1367:
1.7 millert 1368: July 2, 1988:
1369: performance bug in b.c/cgoto(): not freeing some sets of states.
1370: partial fix only right now, and the number of states increased
1371: to make it less obvious.
1.6 kstailey 1372:
1.7 millert 1373: June 1, 1988:
1374: check error status on close
1.6 kstailey 1375:
1.7 millert 1376: May 28, 1988:
1377: srand returns seed value it's using.
1378: see 1/18/90
1.6 kstailey 1379:
1.7 millert 1380: May 22, 1988:
1381: Removed limit on depth of function calls.
1.6 kstailey 1382:
1.7 millert 1383: May 10, 1988:
1384: Fixed lib.c to permit _ in commandline variable names.
1.6 kstailey 1385:
1.7 millert 1386: Mar 25, 1988:
1387: main.c fixed to recognize -- as terminator of command-
1388: line options. Illegal options flagged.
1389: Error reporting slightly cleaned up.
1.6 kstailey 1390:
1.7 millert 1391: Dec 2, 1987:
1392: Newer C compilers apply a strict scope rule to extern
1393: declarations within functions. Two extern declarations in
1394: lib.c and tran.c have been moved to obviate this problem.
1.6 kstailey 1395:
1.7 millert 1396: Oct xx, 1987:
1397: Reluctantly added toupper and tolower functions.
1398: Subject to rescinding without notice.
1.6 kstailey 1399:
1.7 millert 1400: Sep 17, 1987:
1401: Error-message printer had printf(s) instead of
1402: printf("%s",s); got core dumps when the message
1403: included a %.
1.6 kstailey 1404:
1.7 millert 1405: Sep 12, 1987:
1406: Very long printf strings caused core dump;
1407: fixed aprintf, asprintf, format to catch them.
1408: Can still get a core dump in printf itself.
1.6 kstailey 1409:
1410:
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