Annotation of src/usr.bin/awk/FIXES, Revision 1.13
1.13 ! millert 1: /* $OpenBSD: FIXES,v 1.12 2003/11/09 20:13:57 otto Exp $ */
1.1 tholo 2: /****************************************************************
1.6 kstailey 3: Copyright (C) Lucent Technologies 1997
1.1 tholo 4: All Rights Reserved
5:
6: Permission to use, copy, modify, and distribute this software and
7: its documentation for any purpose and without fee is hereby
8: granted, provided that the above copyright notice appear in all
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1.6 kstailey 11: documentation, and that the name Lucent Technologies or any of
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22: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
23: THIS SOFTWARE.
1.1 tholo 24: ****************************************************************/
25:
26: This file lists all bug fixes, changes, etc., made since the AWK book
27: was sent to the printers in August, 1987.
1.13 ! millert 28:
! 29: Dec 22, 2004:
! 30: cranked up size of NCHARS; coverity thinks it can be overrun with
! 31: smaller size, and i think that's right. added some assertions to b.c
! 32: to catch places where it might overrun. the RE code is still fragile.
! 33:
! 34: Dec 5, 2004:
! 35: fixed a couple of overflow problems with ridiculous field numbers:
! 36: e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas
! 37: and david o'brien at freebsd.org for patches. this really should
! 38: be re-done from scratch.
! 39:
! 40: Nov 21, 2004:
! 41: fixed another 25-year-old RE bug, in split. it's another failure
! 42: to (re-)initialize. thanks to steve fisher for spotting this and
! 43: providing a good test case.
! 44:
! 45: Nov 22, 2003:
! 46: fixed a bug in regular expressions that dates (so help me) from 1977;
! 47: it's been there from the beginning. an anchored longest match that
! 48: was longer than the number of states triggered a failure to initialize
! 49: the machine properly. many thanks to moinak ghosh for not only finding
! 50: this one but for providing a fix, in some of the most mysterious
! 51: code known to man.
! 52:
! 53: fixed a storage leak in call() that appears to have been there since
! 54: 1983 or so -- a function without an explicit return that assigns a
! 55: string to a parameter leaked a Cell. thanks to moinak ghosh for
! 56: spotting this very subtle one.
! 57:
! 58: Jul 31, 2003:
! 59: fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c
! 60: that mis-handled the character 255 in input. (it was being compared
! 61: to EOF with a signed comparison.)
! 62:
! 63: Jul 29, 2003:
! 64: fixed (i think) the long-standing botch that included the beginning of
! 65: line state ^ for RE's in the set of valid characters; this led to a
! 66: variety of odd problems, including failure to properly match certain
! 67: regular expressions in non-US locales. thanks to ruslan for keeping
! 68: at this one.
! 69:
! 70: Jul 28, 2003:
! 71: n-th try at getting internationalization right, with thanks to volker
! 72: kiefel, arnold robbins and ruslan ermilov for advice, though they
! 73: should not be blamed for the outcome. according to posix, "." is the
! 74: radix character in programs and command line arguments regardless of
! 75: the locale; otherwise, the locale should prevail for input and output
! 76: of numbers. so it's intended to work that way.
! 77:
! 78: i have rescinded the attempt to use strcoll in expanding shorthands in
! 79: regular expressions (cclenter). its properties are much too
! 80: surprising; for example [a-c] matches aAbBc in locale en_US but abBcC
! 81: in locale fr_CA. i can see how this might arise by implementation
! 82: but i cannot explain it to a human user. (this behavior can be seen
! 83: in gawk as well; we're leaning on the same library.)
! 84:
! 85: the issue appears to be that strcoll is meant for sorting, where
! 86: merging upper and lower case may make sense (though note that unix
! 87: sort does not do this by default either). it is not appropriate
! 88: for regular expressions, where the goal is to match specific
! 89: patterns of characters. in any case, the notations [:lower:], etc.,
! 90: are available in awk, and they are more likely to work correctly in
! 91: most locales.
! 92:
! 93: a moratorium is hereby declared on internationalization changes.
! 94: i apologize to friends and colleagues in other parts of the world.
! 95: i would truly like to get this "right", but i don't know what
! 96: that is, and i do not want to keep making changes until it's clear.
! 97:
! 98: Jul 4, 2003:
! 99: fixed bug that permitted non-terminated RE, as in "awk /x".
! 100:
! 101: Jun 1, 2003:
! 102: subtle change to split: if source is empty, number of elems
! 103: is always 0 and the array is not set.
! 104:
! 105: Mar 21, 2003:
! 106: added some parens to isblank, in another attempt to make things
! 107: internationally portable.
! 108:
! 109: Mar 14, 2003:
! 110: the internationalization changes, somewhat modified, are now
! 111: reinstated. in theory awk will now do character comparisons
! 112: and case conversions in national language, but "." will always
! 113: be the decimal point separator on input and output regardless
! 114: of national language. isblank(){} has an #ifndef.
! 115:
! 116: this no longer compiles on windows: LC_MESSAGES isn't defined
! 117: in vc6++.
! 118:
! 119: fixed subtle behavior in field and record splitting: if FS is
! 120: a single character and RS is not empty, \n is NOT a separator.
! 121: this tortuous reading is found in the awk book; behavior now
! 122: matches gawk and mawk.
1.11 millert 123:
124: Dec 13, 2002:
125: for the moment, the internationalization changes of nov 29 are
126: rolled back -- programs like x = 1.2 don't work in some locales,
127: because the parser is expecting x = 1,2. until i understand this
128: better, this will have to wait.
129:
130: Nov 29, 2002:
131: modified b.c (with tiny changes in main and run) to support
132: locales, using strcoll and iswhatever tests for posix character
133: classes. thanks to ruslan ermilov (ru@freebsd.org) for code.
134: the function isblank doesn't seem to have propagated to any
135: header file near me, so it's there explicitly. not properly
136: tested on non-ascii character sets by me.
137:
138: Jun 28, 2002:
139: modified run/format() and tran/getsval() to do a slightly better
140: job on using OFMT for output from print and CONVFMT for other
141: number->string conversions, as promised by posix and done by
142: gawk and mawk. there are still places where it doesn't work
143: right if CONVFMT is changed; by then the STR attribute of the
144: variable has been irrevocably set. thanks to arnold robbins for
145: code and examples.
146:
147: fixed subtle bug in format that could get core dump. thanks to
148: Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing.
149: minor cleanup in run.c / format() at the same time.
150:
151: added some tests for null pointers to debugging printf's, which
152: were never intended for external consumption. thanks to dave
153: kerns (dkerns@lucent.com) for pointing this out.
154:
155: GNU compatibility: an empty regexp matches anything (thanks to
156: dag-erling smorgrav, des@ofug.org). subject to reversion if
157: this does more harm than good.
158:
159: pervasive small changes to make things more const-correct, as
160: reported by gcc's -Wwrite-strings. as it says in the gcc manual,
161: this may be more nuisance than useful. provoked by a suggestion
162: and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk
163:
164: minor documentation changes to note that this now compiles out
165: of the box on Mac OS X.
166:
167: Feb 10, 2002:
168: changed types in posix chars structure to quiet solaris cc.
169:
170: Jan 1, 2002:
171: fflush() or fflush("") flushes all files and pipes.
172:
173: length(arrayname) returns number of elements; thanks to
174: arnold robbins for suggestion.
175:
176: added a makefile.win to make it easier to build on windows.
177: based on dan allen's buildwin.bat.
178:
179: Nov 16, 2001:
180: added support for posix character class names like [:digit:],
181: which are not exactly shorter than [0-9] and perhaps no more
182: portable. thanks to dag-erling smorgrav for code.
183:
184: Feb 16, 2001:
185: removed -m option; no longer needed, and it was actually
186: broken (noted thanks to volker kiefel).
187:
188: Feb 10, 2001:
189: fixed an appalling bug in gettok: any sequence of digits, +,-, E, e,
190: and period was accepted as a valid number if it started with a period.
191: this would never have happened with the lex version.
192:
193: other 1-character botches, now fixed, include a bare $ and a
194: bare " at the end of the input.
195:
196: Feb 7, 2001:
197: more (const char *) casts in b.c and tran.c to silence warnings.
1.8 millert 198:
1.10 millert 199: Nov 15, 2000:
200: fixed a bug introduced in august 1997 that caused expressions
201: like $f[1] to be syntax errors. thanks to arnold robbins for
202: noticing this and providing a fix.
203:
204: Oct 30, 2000:
205: fixed some nextfile bugs: not handling all cases. thanks to
206: arnold robbins for pointing this out. new regressions added.
207:
208: close() is now a function. it returns whatever the library
209: fclose returns, and -1 for closing a file or pipe that wasn't
210: opened.
211:
212: Sep 24, 2000:
213: permit \n explicitly in character classes; won't work right
214: if comes in as "[\n]" but ok as /[\n]/, because of multiple
215: processing of \'s. thanks to arnold robbins.
216:
217: July 5, 2000:
218: minor fiddles in tran.c to keep compilers happy about uschar.
219: thanks to norman wilson.
220:
221: May 25, 2000:
222: yet another attempt at making 8-bit input work, with another
223: band-aid in b.c (member()), and some (uschar) casts to head
224: off potential errors in subscripts (like isdigit). also
225: changed HAT to NCHARS-2. thanks again to santiago vila.
226:
227: changed maketab.c to ignore apparently out of range definitions
228: instead of halting; new freeBSD generates one. thanks to
229: jon snader <jsnader@ix.netcom.com> for pointing out the problem.
230:
231: May 2, 2000:
232: fixed an 8-bit problem in b.c by making several char*'s into
233: unsigned char*'s. not clear i have them all yet. thanks to
234: Santiago Vila <sanvila@unex.es> for the bug report.
235:
236: Apr 21, 2000:
237: finally found and fixed a memory leak in function call; it's
238: been there since functions were added ~1983. thanks to
239: jon bentley for the test case that found it.
240:
241: added test in envinit to catch environment "variables" with
1.12 otto 242: names beginning with '='; thanks to Berend Hasselman.
1.10 millert 243:
244: Jul 28, 1999:
245: added test in defn() to catch function foo(foo), which
246: otherwise recurses until core dump. thanks to arnold
247: robbins for noticing this.
248:
1.9 millert 249: Jun 20, 1999:
250: added *bp in gettok in lex.c; appears possible to exit function
251: without terminating the string. thanks to russ cox.
252:
253: Jun 2, 1999:
254: added function stdinit() to run to initialize files[] array,
255: in case stdin, etc., are not constants; some compilers care.
256:
257: May 10, 1999:
258: replaced the ERROR ... FATAL, etc., macros with functions
259: based on vprintf, to avoid problems caused by overrunning
260: fixed-size errbuf array. thanks to ralph corderoy for the
261: impetus, and for pointing out a string termination bug in
262: qstring as well.
263:
264: Apr 21, 1999:
265: fixed bug that caused occasional core dumps with commandline
266: variable with value ending in \. (thanks to nelson beebe for
267: the test case.)
268:
1.8 millert 269: Apr 16, 1999:
270: with code kindly provided by Bruce Lilly, awk now parses
271: /=/ and similar constructs more sensibly in more places.
1.10 millert 272: Bruce also provided some helpful test cases.
1.8 millert 273:
274: Apr 5, 1999:
275: changed true/false to True/False in run.c to make it
276: easier to compile with C++. Added some casts on malloc
277: and realloc to be honest about casts; ditto. changed
278: ltype int to long in struct rrow to reduce some 64-bit
279: complaints; other changes scattered throughout for the
280: same purpose. thanks to Nelson Beebe for these portability
281: improvements.
282:
283: removed some horrible pointer-int casting in b.c and elsewhere
284: by adding ptoi and itonp to localize the casts, which are
285: all benign. fixed one incipient bug that showed up on sgi
286: in 64-bit mode.
287:
288: reset lineno for new source file; include filename in error
289: message. also fixed line number error in continuation lines.
290: (thanks to Nelson Beebe for both of these.)
291:
292: Mar 24, 1999:
293: Nelson Beebe notes that irix 5.3 yacc dies with a bogus
294: error; use a newer version or switch to bison, since sgi
295: is unlikely to fix it.
1.1 tholo 296:
1.7 millert 297: Mar 5, 1999:
1.9 millert 298: changed isnumber to is_number to avoid the problem caused by
299: versions of ctype.h that include the name isnumber.
1.7 millert 300:
301: distribution now includes a script for building on a Mac,
302: thanks to Dan Allen.
303:
304: Feb 20, 1999:
305: fixed memory leaks in run.c (call) and tran.c (setfval).
306: thanks to Stephen Nutt for finding these and providing the fixes.
307:
308: Jan 13, 1999:
309: replaced srand argument by (unsigned int) in run.c;
310: avoids problem on Mac and potentially on Unix & Windows.
311: thanks to Dan Allen.
312:
313: added a few (int) casts to silence useless compiler warnings.
314: e.g., errorflag= in run.c jump().
315:
316: added proctab.c to the bundle outout; one less thing
317: to have to compile out of the box.
318:
319: added calls to _popen and _pclose to the win95 stub for
320: pipes (thanks to Steve Adams for this helpful suggestion).
321: seems to work, though properties are not well understood
322: by me, and it appears that under some circumstances the
323: pipe output is truncated. Be careful.
324:
325: Oct 19, 1998:
326: fixed a couple of bugs in getrec: could fail to update $0
327: after a getline var; because inputFS wasn't initialized,
328: could split $0 on every character, a misleading diversion.
329:
330: fixed caching bug in makedfa: LRU was actually removing
331: least often used.
332:
333: thanks to ross ridge for finding these, and for providing
334: great bug reports.
335:
336: May 12, 1998:
337: fixed potential bug in readrec: might fail to update record
338: pointer after growing. thanks to dan levy for spotting this
339: and suggesting the fix.
340:
341: Mar 12, 1998:
342: added -V to print version number and die.
343:
344: Feb 11, 1998:
345: subtle silent bug in lex.c: if the program ended with a number
346: longer than 1 digit, part of the input would be pushed back and
347: parsed again because token buffer wasn't terminated right.
348: example: awk 'length($0) > 10'. blush. at least i found it
349: myself.
350:
351: Aug 31, 1997:
352: s/adelete/awkdelete/: SGI uses this in malloc.h.
353: thanks to nelson beebe for pointing this one out.
354:
355: Aug 21, 1997:
356: fixed some bugs in sub and gsub when replacement includes \\.
357: this is a dark, horrible corner, but at least now i believe that
358: the behavior is the same as gawk and the intended posix standard.
359: thanks to arnold robbins for advice here.
360:
361: Aug 9, 1997:
362: somewhat regretfully, replaced the ancient lex-based lexical
363: analyzer with one written in C. it's longer, generates less code,
364: and more portable; the old one depended too much on mysterious
365: properties of lex that were not preserved in other environments.
366: in theory these recognize the same language.
367:
368: now using strtod to test whether a string is a number, instead of
369: the convoluted original function. should be more portable and
370: reliable if strtod is implemented right.
371:
372: removed now-pointless optimization in makefile that tries to avoid
373: recompilation when awkgram.y is changed but symbols are not.
374:
375: removed most fixed-size arrays, though a handful remain, some
376: of which are unchecked. you have been warned.
377:
378: Aug 4, 1997:
379: with some trepidation, replaced the ancient code that managed
380: fields and $0 in fixed-size arrays with arrays that grow on
381: demand. there is still some tension between trying to make this
382: run fast and making it clean; not sure it's right yet.
383:
384: the ill-conceived -mr and -mf arguments are now useful only
385: for debugging. previous dynamic string code removed.
386:
387: numerous other minor cleanups along the way.
1.1 tholo 388:
1.7 millert 389: Jul 30, 1997:
390: using code provided by dan levy (to whom profuse thanks), replaced
391: fixed-size arrays and awkward kludges by a fairly uniform mechanism
392: to grow arrays as needed for printf, sub, gsub, etc.
1.1 tholo 393:
1.7 millert 394: Jul 23, 1997:
395: falling off the end of a function returns "" and 0, not 0.
396: thanks to arnold robbins.
1.1 tholo 397:
1.7 millert 398: Jun 17, 1997:
399: replaced several fixed-size arrays by dynamically-created ones
400: in run.c; added overflow tests to some previously unchecked cases.
401: getline, toupper, tolower.
1.1 tholo 402:
1.7 millert 403: getline code is still broken in that recursive calls may wind
404: up using the same space. [fixed later]
1.1 tholo 405:
1.7 millert 406: increased RECSIZE to 8192 to push problems further over the horizon.
1.1 tholo 407:
1.7 millert 408: added \r to \n as input line separator for programs, not data.
409: damn CRLFs.
1.1 tholo 410:
1.7 millert 411: modified format() to permit explicit printf("%c", 0) to include
412: a null byte in output. thanks to ken stailey for the fix.
1.1 tholo 413:
1.7 millert 414: added a "-safe" argument that disables file output (print >,
415: print >>), process creation (cmd|getline, print |, system), and
416: access to the environment (ENVIRON). this is a first approximation
417: to a "safe" version of awk, but don't rely on it too much. thanks
418: to joan feigenbaum and matt blaze for the inspiration long ago.
1.1 tholo 419:
1.7 millert 420: Jul 8, 1996:
421: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to
422: ralph corderoy.
1.1 tholo 423:
1.7 millert 424: Jun 29, 1996:
425: fixed awful bug in new field splitting; didn't get all the places
426: where input was done.
1.1 tholo 427:
1.7 millert 428: Jun 28, 1996:
429: changed field-splitting to conform to posix definition: fields are
430: split using the value of FS at the time of input; it used to be
431: the value when the field or NF was first referred to, a much less
432: predictable definition. thanks to arnold robbins for encouragement
433: to do the right thing.
1.1 tholo 434:
1.7 millert 435: May 28, 1996:
436: fixed appalling but apparently unimportant bug in parsing octal
437: numbers in reg exprs.
1.1 tholo 438:
1.7 millert 439: explicit hex in reg exprs now limited to 2 chars: \xa, \xaa.
1.1 tholo 440:
1.7 millert 441: May 27, 1996:
442: cleaned up some declarations so gcc -Wall is now almost silent.
1.1 tholo 443:
1.7 millert 444: makefile now includes backup copies of ytab.c and lexyy.c in case
445: one makes before looking; it also avoids recreating lexyy.c unless
446: really needed.
1.1 tholo 447:
1.7 millert 448: s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes
449: with unwisely-written header files.
1.1 tholo 450:
1.7 millert 451: thanks to jeffrey friedl for several of these.
1.1 tholo 452:
1.7 millert 453: May 26, 1996:
454: an attempt to rationalize the (unsigned) char issue. almost all
455: instances of unsigned char have been removed; the handful of places
456: in b.c where chars are used as table indices have been hand-crafted.
457: added some latin-1 tests to the regression, but i'm not confident;
458: none of my compilers seem to care much. thanks to nelson beebe for
459: pointing out some others that do care.
1.1 tholo 460:
1.7 millert 461: May 2, 1996:
462: removed all register declarations.
1.1 tholo 463:
1.7 millert 464: enhanced split(), as in gawk, etc: split(s, a, "") splits s into
465: a[1]...a[length(s)] with each character a single element.
1.1 tholo 466:
1.7 millert 467: made the same changes for field-splitting if FS is "".
1.1 tholo 468:
1.7 millert 469: added nextfile, as in gawk: causes immediate advance to next
470: input file. (thanks to arnold robbins for inspiration and code).
1.1 tholo 471:
1.7 millert 472: small fixes to regexpr code: can now handle []], [[], and
473: variants; [] is now a syntax error, rather than matching
474: everything; [z-a] is now empty, not z. far from complete
475: or correct, however. (thanks to jeffrey friedl for pointing out
476: some awful behaviors.)
1.1 tholo 477:
1.7 millert 478: Apr 29, 1996:
1.12 otto 479: replaced uchar by uschar everywhere; apparently some compilers
1.7 millert 480: usurp this name and this causes conflicts.
1.1 tholo 481:
1.7 millert 482: fixed call to time in run.c (bltin); arg is time_t *.
1.1 tholo 483:
1.7 millert 484: replaced horrible pointer/long punning in b.c by a legitimate
485: union. should be safer on 64-bit machines and cleaner everywhere.
486: (thanks to nelson beebe for pointing out some of these problems.)
1.1 tholo 487:
1.7 millert 488: replaced nested comments by #if 0...#endif in run.c, lib.c.
1.1 tholo 489:
1.7 millert 490: removed getsval, setsval, execute macros from run.c and lib.c.
491: machines are 100x faster than they were when these macros were
492: first used.
1.1 tholo 493:
1.7 millert 494: revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l,
495: y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of
496: portability to nameless systems.
1.1 tholo 497:
1.7 millert 498: "make bundle" now includes yacc and lex output files for recipients
499: who don't have yacc or lex.
1.1 tholo 500:
1.7 millert 501: Aug 15, 1995:
502: initialized Cells in setsymtab more carefully; some fields
503: were not set. (thanks to purify, all of whose complaints i
504: think i now understand.)
1.1 tholo 505:
1.7 millert 506: fixed at least one error in gsub that looked at -1-th element
507: of an array when substituting for a null match (e.g., $).
1.1 tholo 508:
1.7 millert 509: delete arrayname is now legal; it clears the elements but leaves
510: the array, which may not be the right behavior.
1.1 tholo 511:
1.7 millert 512: modified makefile: my current make can't cope with the test used
513: to avoid unnecessary yacc invocations.
1.1 tholo 514:
1.7 millert 515: Jul 17, 1995:
516: added dynamically growing strings to awk.lx.l and b.c
517: to permit regular expressions to be much bigger.
518: the state arrays can still overflow.
1.1 tholo 519:
1.7 millert 520: Aug 24, 1994:
521: detect duplicate arguments in function definitions (mdm).
1.1 tholo 522:
1.7 millert 523: May 11, 1994:
524: trivial fix to printf to limit string size in sub().
1.1 tholo 525:
1.7 millert 526: Apr 22, 1994:
527: fixed yet another subtle self-assignment problem:
528: $1 = $2; $1 = $1 clobbered $1.
1.1 tholo 529:
1.7 millert 530: Regression tests now use private echo, to avoid quoting problems.
1.1 tholo 531:
1.7 millert 532: Feb 2, 1994:
533: changed error() to print line number as %d, not %g.
1.1 tholo 534:
1.7 millert 535: Jul 23, 1993:
536: cosmetic changes: increased sizes of some arrays,
537: reworded some error messages.
1.1 tholo 538:
1.7 millert 539: added CONVFMT as in posix (just replaced OFMT in getsval)
1.1 tholo 540:
1.7 millert 541: FILENAME is now "" until the first thing that causes a file
542: to be opened.
1.1 tholo 543:
1.7 millert 544: Nov 28, 1992:
545: deleted yyunput and yyoutput from proto.h;
546: different versions of lex give these different declarations.
1.1 tholo 547:
1.7 millert 548: May 31, 1992:
549: added -mr N and -mf N options: more record and fields.
550: these really ought to adjust automatically.
1.1 tholo 551:
1.7 millert 552: cleaned up some error messages; "out of space" now means
553: malloc returned NULL in all cases.
1.1 tholo 554:
1.7 millert 555: changed rehash so that if it runs out, it just returns;
556: things will continue to run slow, but maybe a bit longer.
1.1 tholo 557:
1.7 millert 558: Apr 24, 1992:
559: remove redundant close of stdin when using -f -.
1.1 tholo 560:
1.7 millert 561: got rid of core dump with -d; awk -d just prints date.
1.1 tholo 562:
1.7 millert 563: Apr 12, 1992:
564: added explicit check for /dev/std(in,out,err) in redirection.
565: unlike gawk, no /dev/fd/n yet.
1.1 tholo 566:
1.7 millert 567: added (file/pipe) builtin. hard to test satisfactorily.
568: not posix.
1.1 tholo 569:
1.7 millert 570: Feb 20, 1992:
571: recompile after abortive changes; should be unchanged.
1.1 tholo 572:
1.7 millert 573: Dec 2, 1991:
574: die-casting time: converted to ansi C, installed that.
1.1 tholo 575:
1.7 millert 576: Nov 30, 1991:
577: fixed storage leak in freefa, failing to recover [N]CCL.
578: thanks to Bill Jones (jones@cs.usask.ca)
1.1 tholo 579:
1.7 millert 580: Nov 19, 1991:
581: use RAND_MAX instead of literal in builtin().
1.1 tholo 582:
1.7 millert 583: Nov 12, 1991:
584: cranked up some fixed-size arrays in b.c, and added a test for
585: overflow in penter. thanks to mark larsen.
1.1 tholo 586:
1.7 millert 587: Sep 24, 1991:
588: increased buffer in gsub. a very crude fix to a general problem.
589: and again on Sep 26.
1.1 tholo 590:
1.7 millert 591: Aug 18, 1991:
592: enforce variable name syntax for commandline variables: has to
593: start with letter or _.
1.1 tholo 594:
1.7 millert 595: Jul 27, 1991:
596: allow newline after ; in for statements.
1.1 tholo 597:
1.7 millert 598: Jul 21, 1991:
599: fixed so that in self-assignment like $1=$1, side effects
600: like recomputing $0 take place. (this is getting subtle.)
1.1 tholo 601:
1.7 millert 602: Jun 30, 1991:
603: better test for detecting too-long output record.
1.1 tholo 604:
1.7 millert 605: Jun 2, 1991:
606: better defense against very long printf strings.
607: made break and continue illegal outside of loops.
1.1 tholo 608:
1.7 millert 609: May 13, 1991:
610: removed extra arg on gettemp, tempfree. minor error message rewording.
1.1 tholo 611:
612: May 6, 1991:
613: fixed silly bug in hex parsing in hexstr().
614: removed an apparently unnecessary test in isnumber().
615: warn about weird printf conversions.
616: fixed unchecked array overwrite in relex().
617:
618: changed for (i in array) to access elements in sorted order.
619: then unchanged it -- it really does run slower in too many cases.
620: left the code in place, commented out.
621:
1.7 millert 622: Feb 10, 1991:
623: check error status on all writes, to avoid banging on full disks.
1.1 tholo 624:
1.7 millert 625: Jan 28, 1991:
626: awk -f - reads the program from stdin.
1.1 tholo 627:
1.7 millert 628: Jan 11, 1991:
629: failed to set numeric state on $0 in cmd|getline context in run.c.
1.1 tholo 630:
1.7 millert 631: Nov 2, 1990:
632: fixed sleazy test for integrality in getsval; use modf.
1.1 tholo 633:
1.7 millert 634: Oct 29, 1990:
635: fixed sleazy buggy code in lib.c that looked (incorrectly) for
636: too long input lines.
1.1 tholo 637:
1.7 millert 638: Oct 14, 1990:
639: fixed the bug on p. 198 in which it couldn't deduce that an
640: argument was an array in some contexts. replaced the error
641: message in intest() by code that damn well makes it an array.
1.1 tholo 642:
1.7 millert 643: Oct 8, 1990:
644: fixed horrible bug: types and values were not preserved in
645: some kinds of self-assignment. (in assign().)
1.1 tholo 646:
1.7 millert 647: Aug 24, 1990:
648: changed NCHARS to 256 to handle 8-bit characters in strings
649: presented to match(), etc.
1.1 tholo 650:
1.7 millert 651: Jun 26, 1990:
652: changed struct rrow (awk.h) to use long instead of int for lval,
653: since cfoll() stores a pointer in it. now works better when int's
654: are smaller than pointers!
1.1 tholo 655:
1.7 millert 656: May 6, 1990:
657: AVA fixed the grammar so that ! is uniformly of the same precedence as
658: unary + and -. This renders illegal some constructs like !x=y, which
659: now has to be parenthesized as !(x=y), and makes others work properly:
660: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements.
661: (These problems were pointed out by Bob Lenk of Posix.)
1.1 tholo 662:
1.7 millert 663: Added \x to regular expressions (already in strings).
664: Limited octal to octal digits; \8 and \9 are not octal.
665: Centralized the code for parsing escapes in regular expressions.
666: Added a bunch of tests to T.re and T.sub to verify some of this.
1.1 tholo 667:
1.7 millert 668: Feb 9, 1990:
669: fixed null pointer dereference bug in main.c: -F[nothing]. sigh.
1.1 tholo 670:
1.7 millert 671: restored srand behavior: it returns the current seed.
1.1 tholo 672:
1.7 millert 673: Jan 18, 1990:
674: srand now returns previous seed value (0 to start).
1.1 tholo 675:
1.7 millert 676: Jan 5, 1990:
677: fix potential problem in tran.c -- something was freed,
678: then used in freesymtab.
1.1 tholo 679:
1.7 millert 680: Oct 18, 1989:
681: another try to get the max number of open files set with
682: relatively machine-independent code.
1.1 tholo 683:
1.7 millert 684: small fix to input() in case of multiple reads after EOF.
1.1 tholo 685:
1.7 millert 686: Oct 11, 1989:
687: FILENAME is now defined in the BEGIN block -- too many old
688: programs broke.
1.1 tholo 689:
1.7 millert 690: "-" means stdin in getline as well as on the commandline.
1.1 tholo 691:
1.7 millert 692: added a bunch of casts to the code to tell the truth about
693: char * vs. unsigned char *, a right royal pain. added a
694: setlocale call to the front of main, though probably no one
695: has it usefully implemented yet.
1.1 tholo 696:
1.7 millert 697: Aug 24, 1989:
698: removed redundant relational tests against nullnode if parse
699: tree already had a relational at that point.
1.1 tholo 700:
1.7 millert 701: Aug 11, 1989:
702: fixed bug: commandline variable assignment has to look like
703: var=something. (consider the man page for =, in file =.1)
1.1 tholo 704:
1.7 millert 705: changed number of arguments to functions to static arrays
706: to avoid repeated malloc calls.
1.1 tholo 707:
1.7 millert 708: Aug 2, 1989:
709: restored -F (space) separator
1.1 tholo 710:
1.7 millert 711: Jul 30, 1989:
712: added -v x=1 y=2 ... for immediate commandline variable assignment;
713: done before the BEGIN block for sure. they have to precede the
714: program if the program is on the commandline.
715: Modified Aug 2 to require a separate -v for each assignment.
1.1 tholo 716:
1.7 millert 717: Jul 10, 1989:
718: fixed ref-thru-zero bug in environment code in tran.c
1.1 tholo 719:
1.7 millert 720: Jun 23, 1989:
721: add newline to usage message.
1.1 tholo 722:
1.7 millert 723: Jun 14, 1989:
724: added some missing ansi printf conversion letters: %i %X %E %G.
725: no sensible meaning for h or L, so they may not do what one expects.
1.1 tholo 726:
1.7 millert 727: made %* conversions work.
1.1 tholo 728:
1.7 millert 729: changed x^y so that if n is a positive integer, it's done
730: by explicit multiplication, thus achieving maximum accuracy.
731: (this should be done by pow() but it seems not to be locally.)
732: done to x ^= y as well.
1.1 tholo 733:
1.7 millert 734: Jun 4, 1989:
735: ENVIRON array contains environment: if shell variable V=thing,
736: ENVIRON["V"] is "thing"
1.1 tholo 737:
1.7 millert 738: multiple -f arguments permitted. error reporting is naive.
739: (they were permitted before, but only the last was used.)
1.1 tholo 740:
1.7 millert 741: fixed a really stupid botch in the debugging macro dprintf
1.1 tholo 742:
1.7 millert 743: fixed order of evaluation of commandline assignments to match
744: what the book claims: an argument of the form x=e is evaluated
745: at the time it would have been opened if it were a filename (p 63).
746: this invalidates the suggested answer to ex 4-1 (p 195).
1.1 tholo 747:
1.7 millert 748: removed some code that permitted -F (space) fieldseparator,
749: since it didn't quite work right anyway. (restored aug 2)
1.1 tholo 750:
1.7 millert 751: Apr 27, 1989:
752: Line number now accumulated correctly for comment lines.
1.1 tholo 753:
1.7 millert 754: Apr 26, 1989:
755: Debugging output now includes a version date,
756: if one compiles it into the source each time.
1.1 tholo 757:
1.7 millert 758: Apr 9, 1989:
759: Changed grammar to prohibit constants as 3rd arg of sub and gsub;
760: prevents class of overwriting-a-constant errors. (Last one?)
761: This invalidates the "banana" example on page 43 of the book.
1.1 tholo 762:
1.7 millert 763: Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal),
764: as in ANSI, for strings. Rescinded the sloppiness that permitted
765: non-octal digits in \ooo. Warning: not all compilers and libraries
766: will be able to deal with \x correctly.
1.1 tholo 767:
1.7 millert 768: Jan 9, 1989:
769: Fixed bug that caused tempcell list to contain a duplicate.
770: The fix is kludgy.
1.1 tholo 771:
1.7 millert 772: Dec 17, 1988:
773: Catches some more commandline errors in main.
774: Removed redundant decl of modf in run.c (confuses some compilers).
775: Warning: there's no single declaration of malloc, etc., in awk.h
776: that seems to satisfy all compilers.
1.1 tholo 777:
1.7 millert 778: Dec 7, 1988:
779: Added a bit of code to error printing to avoid printing nulls.
780: (Not clear that it actually would.)
1.1 tholo 781:
1.7 millert 782: Nov 27, 1988:
783: With fear and trembling, modified the grammar to permit
784: multiple pattern-action statements on one line without
785: an explicit separator. By definition, this capitulation
786: to the ghost of ancient implementations remains undefined
787: and thus subject to change without notice or apology.
788: DO NOT COUNT ON IT.
1.1 tholo 789:
1.7 millert 790: Oct 30, 1988:
791: Fixed bug in call() that failed to recover storage.
1.1 tholo 792:
1.7 millert 793: A warning is now generated if there are more arguments
794: in the call than in the definition (in lieu of fixing
795: another storage leak).
1.2 millert 796:
1.7 millert 797: Oct 20, 1988:
798: Fixed %c: if expr is numeric, use numeric value;
799: otherwise print 1st char of string value. still
800: doesn't work if the value is 0 -- won't print \0.
1.2 millert 801:
1.7 millert 802: Added a few more checks for running out of malloc.
1.2 millert 803:
1.7 millert 804: Oct 12, 1988:
805: Fixed bug in call() that freed local arrays twice.
1.5 kstailey 806:
1.7 millert 807: Fixed to handle deletion of non-existent array right;
808: complains about attempt to delete non-array element.
1.6 kstailey 809:
1.7 millert 810: Sep 30, 1988:
811: Now guarantees to evaluate all arguments of built-in
812: functions, as in C; the appearance is that arguments
813: are evaluated before the function is called. Places
814: affected are sub (gsub was ok), substr, printf, and
815: all the built-in arithmetic functions in bltin().
816: A warning is generated if a bltin() is called with
817: the wrong number of arguments.
1.6 kstailey 818:
1.7 millert 819: This requires changing makeprof on p167 of the book.
1.6 kstailey 820:
1.7 millert 821: Aug 23, 1988:
822: setting FILENAME in BEGIN caused core dump, apparently
823: because it was freeing space not allocated by malloc.
1.6 kstailey 824:
1.7 millert 825: July 24, 1988:
826: fixed egregious error in toupper/tolower functions.
827: still subject to rescinding, however.
1.6 kstailey 828:
1.7 millert 829: July 2, 1988:
830: flush stdout before opening file or pipe
1.6 kstailey 831:
1.7 millert 832: July 2, 1988:
833: performance bug in b.c/cgoto(): not freeing some sets of states.
834: partial fix only right now, and the number of states increased
835: to make it less obvious.
1.6 kstailey 836:
1.7 millert 837: June 1, 1988:
838: check error status on close
1.6 kstailey 839:
1.7 millert 840: May 28, 1988:
841: srand returns seed value it's using.
842: see 1/18/90
1.6 kstailey 843:
1.7 millert 844: May 22, 1988:
845: Removed limit on depth of function calls.
1.6 kstailey 846:
1.7 millert 847: May 10, 1988:
848: Fixed lib.c to permit _ in commandline variable names.
1.6 kstailey 849:
1.7 millert 850: Mar 25, 1988:
851: main.c fixed to recognize -- as terminator of command-
852: line options. Illegal options flagged.
853: Error reporting slightly cleaned up.
1.6 kstailey 854:
1.7 millert 855: Dec 2, 1987:
856: Newer C compilers apply a strict scope rule to extern
857: declarations within functions. Two extern declarations in
858: lib.c and tran.c have been moved to obviate this problem.
1.6 kstailey 859:
1.7 millert 860: Oct xx, 1987:
861: Reluctantly added toupper and tolower functions.
862: Subject to rescinding without notice.
1.6 kstailey 863:
1.7 millert 864: Sep 17, 1987:
865: Error-message printer had printf(s) instead of
866: printf("%s",s); got core dumps when the message
867: included a %.
1.6 kstailey 868:
1.7 millert 869: Sep 12, 1987:
870: Very long printf strings caused core dump;
871: fixed aprintf, asprintf, format to catch them.
872: Can still get a core dump in printf itself.
1.6 kstailey 873:
874:
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