1/**************************************************************** 2Copyright (C) Lucent Technologies 1997 3All Rights Reserved 4 5Permission to use, copy, modify, and distribute this software and 6its documentation for any purpose and without fee is hereby 7granted, provided that the above copyright notice appear in all 8copies and that both that the copyright notice and this 9permission notice and warranty disclaimer appear in supporting 10documentation, and that the name Lucent Technologies or any of 11its entities not be used in advertising or publicity pertaining 12to distribution of the software without specific, written prior 13permission. 14 15LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, 16INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. 17IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY 18SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 19WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER 20IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 21ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF 22THIS SOFTWARE. 23****************************************************************/ 24 25This file lists all bug fixes, changes, etc., made since the AWK book 26was sent to the printers in August, 1987. 27 28Nov 26, 2009: 29 fixed a long-standing issue with when FS takes effect. a 30 change to FS is now noticed immediately for subsequent splits. 31 32 changed the name getline() to awkgetline() to avoid yet another 33 name conflict somewhere. 34 35Feb 11, 2009: 36 temporarily for now defined HAS_ISBLANK, since that seems to 37 be the best way through the thicket. isblank arrived in C99, 38 but seems to be arriving at different systems at different 39 times. 40 41Oct 8, 2008: 42 fixed typo in b.c that set tmpvec wrongly. no one had ever 43 run into the problem, apparently. thanks to alistair crooks. 44 45Oct 23, 2007: 46 minor fix in lib.c: increase inputFS to 100, change malloc 47 for fields to n+1. 48 49 fixed memory fault caused by out of order test in setsval. 50 51 thanks to david o'brien, freebsd, for both fixes. 52 53May 1, 2007: 54 fiddle in makefile to fix for BSD make; thanks to igor sobrado. 55 56Mar 31, 2007: 57 fixed some null pointer refs calling adjbuf. 58 59Feb 21, 2007: 60 fixed a bug in matching the null RE in sub and gsub. thanks to al aho 61 who actually did the fix (in b.c), and to wolfgang seeberg for finding 62 it and providing a very compact test case. 63 64 fixed quotation in b.c; thanks to Hal Pratt and the Princeton Dante 65 Project. 66 67 removed some no-effect asserts in run.c. 68 69 fiddled maketab.c to not complain about bison-generated values. 70 71 removed the obsolete -V argument; fixed --version to print the 72 version and exit. 73 74 fixed wording and an outright error in the usage message; thanks to igor 75 sobrado and jason mcintyre. 76 77 fixed a bug in -d that caused core dump if no program followed. 78 79Jan 1, 2007: 80 dropped mac.code from makefile; there are few non-MacOSX 81 mac's these days. 82 83Jan 17, 2006: 84 system() not flagged as unsafe in the unadvertised -safe option. 85 found it while enhancing tests before shipping the ;login: article. 86 practice what you preach. 87 88 removed the 9-years-obsolete -mr and -mf flags. 89 90 added -version and --version options. 91 92 core dump on linux with BEGIN {nextfile}, now fixed. 93 94 removed some #ifdef's in run.c and lex.c that appear to no 95 longer be necessary. 96 97Apr 24, 2005: 98 modified lib.c so that values of $0 et al are preserved in the END 99 block, apparently as required by posix. thanks to havard eidnes 100 for the report and code. 101 102Jan 14, 2005: 103 fixed infinite loop in parsing, originally found by brian tsang. 104 thanks to arnold robbins for a suggestion that started me 105 rethinking it. 106 107Dec 31, 2004: 108 prevent overflow of -f array in main, head off potential error in 109 call of SYNTAX(), test malloc return in lib.c, all with thanks to 110 todd miller. 111 112Dec 22, 2004: 113 cranked up size of NCHARS; coverity thinks it can be overrun with 114 smaller size, and i think that's right. added some assertions to b.c 115 to catch places where it might overrun. the RE code is still fragile. 116 117Dec 5, 2004: 118 fixed a couple of overflow problems with ridiculous field numbers: 119 e.g., print $(2^32-1). thanks to ruslan ermilov, giorgos keramidas 120 and david o'brien at freebsd.org for patches. this really should 121 be re-done from scratch. 122 123Nov 21, 2004: 124 fixed another 25-year-old RE bug, in split. it's another failure 125 to (re-)initialize. thanks to steve fisher for spotting this and 126 providing a good test case. 127 128Nov 22, 2003: 129 fixed a bug in regular expressions that dates (so help me) from 1977; 130 it's been there from the beginning. an anchored longest match that 131 was longer than the number of states triggered a failure to initialize 132 the machine properly. many thanks to moinak ghosh for not only finding 133 this one but for providing a fix, in some of the most mysterious 134 code known to man. 135 136 fixed a storage leak in call() that appears to have been there since 137 1983 or so -- a function without an explicit return that assigns a 138 string to a parameter leaked a Cell. thanks to moinak ghosh for 139 spotting this very subtle one. 140 141Jul 31, 2003: 142 fixed, thanks to andrey chernov and ruslan ermilov, a bug in lex.c 143 that mis-handled the character 255 in input. (it was being compared 144 to EOF with a signed comparison.) 145 146Jul 29, 2003: 147 fixed (i think) the long-standing botch that included the beginning of 148 line state ^ for RE's in the set of valid characters; this led to a 149 variety of odd problems, including failure to properly match certain 150 regular expressions in non-US locales. thanks to ruslan for keeping 151 at this one. 152 153Jul 28, 2003: 154 n-th try at getting internationalization right, with thanks to volker 155 kiefel, arnold robbins and ruslan ermilov for advice, though they 156 should not be blamed for the outcome. according to posix, "." is the 157 radix character in programs and command line arguments regardless of 158 the locale; otherwise, the locale should prevail for input and output 159 of numbers. so it's intended to work that way. 160 161 i have rescinded the attempt to use strcoll in expanding shorthands in 162 regular expressions (cclenter). its properties are much too 163 surprising; for example [a-c] matches aAbBc in locale en_US but abBcC 164 in locale fr_CA. i can see how this might arise by implementation 165 but i cannot explain it to a human user. (this behavior can be seen 166 in gawk as well; we're leaning on the same library.) 167 168 the issue appears to be that strcoll is meant for sorting, where 169 merging upper and lower case may make sense (though note that unix 170 sort does not do this by default either). it is not appropriate 171 for regular expressions, where the goal is to match specific 172 patterns of characters. in any case, the notations [:lower:], etc., 173 are available in awk, and they are more likely to work correctly in 174 most locales. 175 176 a moratorium is hereby declared on internationalization changes. 177 i apologize to friends and colleagues in other parts of the world. 178 i would truly like to get this "right", but i don't know what 179 that is, and i do not want to keep making changes until it's clear. 180 181Jul 4, 2003: 182 fixed bug that permitted non-terminated RE, as in "awk /x". 183 184Jun 1, 2003: 185 subtle change to split: if source is empty, number of elems 186 is always 0 and the array is not set. 187 188Mar 21, 2003: 189 added some parens to isblank, in another attempt to make things 190 internationally portable. 191 192Mar 14, 2003: 193 the internationalization changes, somewhat modified, are now 194 reinstated. in theory awk will now do character comparisons 195 and case conversions in national language, but "." will always 196 be the decimal point separator on input and output regardless 197 of national language. isblank(){} has an #ifndef. 198 199 this no longer compiles on windows: LC_MESSAGES isn't defined 200 in vc6++. 201 202 fixed subtle behavior in field and record splitting: if FS is 203 a single character and RS is not empty, \n is NOT a separator. 204 this tortuous reading is found in the awk book; behavior now 205 matches gawk and mawk. 206 207Dec 13, 2002: 208 for the moment, the internationalization changes of nov 29 are 209 rolled back -- programs like x = 1.2 don't work in some locales, 210 because the parser is expecting x = 1,2. until i understand this 211 better, this will have to wait. 212 213Nov 29, 2002: 214 modified b.c (with tiny changes in main and run) to support 215 locales, using strcoll and iswhatever tests for posix character 216 classes. thanks to ruslan ermilov (ru@freebsd.org) for code. 217 the function isblank doesn't seem to have propagated to any 218 header file near me, so it's there explicitly. not properly 219 tested on non-ascii character sets by me. 220 221Jun 28, 2002: 222 modified run/format() and tran/getsval() to do a slightly better 223 job on using OFMT for output from print and CONVFMT for other 224 number->string conversions, as promised by posix and done by 225 gawk and mawk. there are still places where it doesn't work 226 right if CONVFMT is changed; by then the STR attribute of the 227 variable has been irrevocably set. thanks to arnold robbins for 228 code and examples. 229 230 fixed subtle bug in format that could get core dump. thanks to 231 Jaromir Dolecek <jdolecek@NetBSD.org> for finding and fixing. 232 minor cleanup in run.c / format() at the same time. 233 234 added some tests for null pointers to debugging printf's, which 235 were never intended for external consumption. thanks to dave 236 kerns (dkerns@lucent.com) for pointing this out. 237 238 GNU compatibility: an empty regexp matches anything (thanks to 239 dag-erling smorgrav, des@ofug.org). subject to reversion if 240 this does more harm than good. 241 242 pervasive small changes to make things more const-correct, as 243 reported by gcc's -Wwrite-strings. as it says in the gcc manual, 244 this may be more nuisance than useful. provoked by a suggestion 245 and code from arnaud desitter, arnaud@nimbus.geog.ox.ac.uk 246 247 minor documentation changes to note that this now compiles out 248 of the box on Mac OS X. 249 250Feb 10, 2002: 251 changed types in posix chars structure to quiet solaris cc. 252 253Jan 1, 2002: 254 fflush() or fflush("") flushes all files and pipes. 255 256 length(arrayname) returns number of elements; thanks to 257 arnold robbins for suggestion. 258 259 added a makefile.win to make it easier to build on windows. 260 based on dan allen's buildwin.bat. 261 262Nov 16, 2001: 263 added support for posix character class names like [:digit:], 264 which are not exactly shorter than [0-9] and perhaps no more 265 portable. thanks to dag-erling smorgrav for code. 266 267Feb 16, 2001: 268 removed -m option; no longer needed, and it was actually 269 broken (noted thanks to volker kiefel). 270 271Feb 10, 2001: 272 fixed an appalling bug in gettok: any sequence of digits, +,-, E, e, 273 and period was accepted as a valid number if it started with a period. 274 this would never have happened with the lex version. 275 276 other 1-character botches, now fixed, include a bare $ and a 277 bare " at the end of the input. 278 279Feb 7, 2001: 280 more (const char *) casts in b.c and tran.c to silence warnings. 281 282Nov 15, 2000: 283 fixed a bug introduced in august 1997 that caused expressions 284 like $f[1] to be syntax errors. thanks to arnold robbins for 285 noticing this and providing a fix. 286 287Oct 30, 2000: 288 fixed some nextfile bugs: not handling all cases. thanks to 289 arnold robbins for pointing this out. new regressions added. 290 291 close() is now a function. it returns whatever the library 292 fclose returns, and -1 for closing a file or pipe that wasn't 293 opened. 294 295Sep 24, 2000: 296 permit \n explicitly in character classes; won't work right 297 if comes in as "[\n]" but ok as /[\n]/, because of multiple 298 processing of \'s. thanks to arnold robbins. 299 300July 5, 2000: 301 minor fiddles in tran.c to keep compilers happy about uschar. 302 thanks to norman wilson. 303 304May 25, 2000: 305 yet another attempt at making 8-bit input work, with another 306 band-aid in b.c (member()), and some (uschar) casts to head 307 off potential errors in subscripts (like isdigit). also 308 changed HAT to NCHARS-2. thanks again to santiago vila. 309 310 changed maketab.c to ignore apparently out of range definitions 311 instead of halting; new freeBSD generates one. thanks to 312 jon snader <jsnader@ix.netcom.com> for pointing out the problem. 313 314May 2, 2000: 315 fixed an 8-bit problem in b.c by making several char*'s into 316 unsigned char*'s. not clear i have them all yet. thanks to 317 Santiago Vila <sanvila@unex.es> for the bug report. 318 319Apr 21, 2000: 320 finally found and fixed a memory leak in function call; it's 321 been there since functions were added ~1983. thanks to 322 jon bentley for the test case that found it. 323 324 added test in envinit to catch environment "variables" with 325 names beginning with '='; thanks to Berend Hasselman. 326 327Jul 28, 1999: 328 added test in defn() to catch function foo(foo), which 329 otherwise recurses until core dump. thanks to arnold 330 robbins for noticing this. 331 332Jun 20, 1999: 333 added *bp in gettok in lex.c; appears possible to exit function 334 without terminating the string. thanks to russ cox. 335 336Jun 2, 1999: 337 added function stdinit() to run to initialize files[] array, 338 in case stdin, etc., are not constants; some compilers care. 339 340May 10, 1999: 341 replaced the ERROR ... FATAL, etc., macros with functions 342 based on vprintf, to avoid problems caused by overrunning 343 fixed-size errbuf array. thanks to ralph corderoy for the 344 impetus, and for pointing out a string termination bug in 345 qstring as well. 346 347Apr 21, 1999: 348 fixed bug that caused occasional core dumps with commandline 349 variable with value ending in \. (thanks to nelson beebe for 350 the test case.) 351 352Apr 16, 1999: 353 with code kindly provided by Bruce Lilly, awk now parses 354 /=/ and similar constructs more sensibly in more places. 355 Bruce also provided some helpful test cases. 356 357Apr 5, 1999: 358 changed true/false to True/False in run.c to make it 359 easier to compile with C++. Added some casts on malloc 360 and realloc to be honest about casts; ditto. changed 361 ltype int to long in struct rrow to reduce some 64-bit 362 complaints; other changes scattered throughout for the 363 same purpose. thanks to Nelson Beebe for these portability 364 improvements. 365 366 removed some horrible pointer-int casting in b.c and elsewhere 367 by adding ptoi and itonp to localize the casts, which are 368 all benign. fixed one incipient bug that showed up on sgi 369 in 64-bit mode. 370 371 reset lineno for new source file; include filename in error 372 message. also fixed line number error in continuation lines. 373 (thanks to Nelson Beebe for both of these.) 374 375Mar 24, 1999: 376 Nelson Beebe notes that irix 5.3 yacc dies with a bogus 377 error; use a newer version or switch to bison, since sgi 378 is unlikely to fix it. 379 380Mar 5, 1999: 381 changed isnumber to is_number to avoid the problem caused by 382 versions of ctype.h that include the name isnumber. 383 384 distribution now includes a script for building on a Mac, 385 thanks to Dan Allen. 386 387Feb 20, 1999: 388 fixed memory leaks in run.c (call) and tran.c (setfval). 389 thanks to Stephen Nutt for finding these and providing the fixes. 390 391Jan 13, 1999: 392 replaced srand argument by (unsigned int) in run.c; 393 avoids problem on Mac and potentially on Unix & Windows. 394 thanks to Dan Allen. 395 396 added a few (int) casts to silence useless compiler warnings. 397 e.g., errorflag= in run.c jump(). 398 399 added proctab.c to the bundle outout; one less thing 400 to have to compile out of the box. 401 402 added calls to _popen and _pclose to the win95 stub for 403 pipes (thanks to Steve Adams for this helpful suggestion). 404 seems to work, though properties are not well understood 405 by me, and it appears that under some circumstances the 406 pipe output is truncated. Be careful. 407 408Oct 19, 1998: 409 fixed a couple of bugs in getrec: could fail to update $0 410 after a getline var; because inputFS wasn't initialized, 411 could split $0 on every character, a misleading diversion. 412 413 fixed caching bug in makedfa: LRU was actually removing 414 least often used. 415 416 thanks to ross ridge for finding these, and for providing 417 great bug reports. 418 419May 12, 1998: 420 fixed potential bug in readrec: might fail to update record 421 pointer after growing. thanks to dan levy for spotting this 422 and suggesting the fix. 423 424Mar 12, 1998: 425 added -V to print version number and die. 426 427Feb 11, 1998: 428 subtle silent bug in lex.c: if the program ended with a number 429 longer than 1 digit, part of the input would be pushed back and 430 parsed again because token buffer wasn't terminated right. 431 example: awk 'length($0) > 10'. blush. at least i found it 432 myself. 433 434Aug 31, 1997: 435 s/adelete/awkdelete/: SGI uses this in malloc.h. 436 thanks to nelson beebe for pointing this one out. 437 438Aug 21, 1997: 439 fixed some bugs in sub and gsub when replacement includes \\. 440 this is a dark, horrible corner, but at least now i believe that 441 the behavior is the same as gawk and the intended posix standard. 442 thanks to arnold robbins for advice here. 443 444Aug 9, 1997: 445 somewhat regretfully, replaced the ancient lex-based lexical 446 analyzer with one written in C. it's longer, generates less code, 447 and more portable; the old one depended too much on mysterious 448 properties of lex that were not preserved in other environments. 449 in theory these recognize the same language. 450 451 now using strtod to test whether a string is a number, instead of 452 the convoluted original function. should be more portable and 453 reliable if strtod is implemented right. 454 455 removed now-pointless optimization in makefile that tries to avoid 456 recompilation when awkgram.y is changed but symbols are not. 457 458 removed most fixed-size arrays, though a handful remain, some 459 of which are unchecked. you have been warned. 460 461Aug 4, 1997: 462 with some trepidation, replaced the ancient code that managed 463 fields and $0 in fixed-size arrays with arrays that grow on 464 demand. there is still some tension between trying to make this 465 run fast and making it clean; not sure it's right yet. 466 467 the ill-conceived -mr and -mf arguments are now useful only 468 for debugging. previous dynamic string code removed. 469 470 numerous other minor cleanups along the way. 471 472Jul 30, 1997: 473 using code provided by dan levy (to whom profuse thanks), replaced 474 fixed-size arrays and awkward kludges by a fairly uniform mechanism 475 to grow arrays as needed for printf, sub, gsub, etc. 476 477Jul 23, 1997: 478 falling off the end of a function returns "" and 0, not 0. 479 thanks to arnold robbins. 480 481Jun 17, 1997: 482 replaced several fixed-size arrays by dynamically-created ones 483 in run.c; added overflow tests to some previously unchecked cases. 484 getline, toupper, tolower. 485 486 getline code is still broken in that recursive calls may wind 487 up using the same space. [fixed later] 488 489 increased RECSIZE to 8192 to push problems further over the horizon. 490 491 added \r to \n as input line separator for programs, not data. 492 damn CRLFs. 493 494 modified format() to permit explicit printf("%c", 0) to include 495 a null byte in output. thanks to ken stailey for the fix. 496 497 added a "-safe" argument that disables file output (print >, 498 print >>), process creation (cmd|getline, print |, system), and 499 access to the environment (ENVIRON). this is a first approximation 500 to a "safe" version of awk, but don't rely on it too much. thanks 501 to joan feigenbaum and matt blaze for the inspiration long ago. 502 503Jul 8, 1996: 504 fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to 505 ralph corderoy. 506 507Jun 29, 1996: 508 fixed awful bug in new field splitting; didn't get all the places 509 where input was done. 510 511Jun 28, 1996: 512 changed field-splitting to conform to posix definition: fields are 513 split using the value of FS at the time of input; it used to be 514 the value when the field or NF was first referred to, a much less 515 predictable definition. thanks to arnold robbins for encouragement 516 to do the right thing. 517 518May 28, 1996: 519 fixed appalling but apparently unimportant bug in parsing octal 520 numbers in reg exprs. 521 522 explicit hex in reg exprs now limited to 2 chars: \xa, \xaa. 523 524May 27, 1996: 525 cleaned up some declarations so gcc -Wall is now almost silent. 526 527 makefile now includes backup copies of ytab.c and lexyy.c in case 528 one makes before looking; it also avoids recreating lexyy.c unless 529 really needed. 530 531 s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes 532 with unwisely-written header files. 533 534 thanks to jeffrey friedl for several of these. 535 536May 26, 1996: 537 an attempt to rationalize the (unsigned) char issue. almost all 538 instances of unsigned char have been removed; the handful of places 539 in b.c where chars are used as table indices have been hand-crafted. 540 added some latin-1 tests to the regression, but i'm not confident; 541 none of my compilers seem to care much. thanks to nelson beebe for 542 pointing out some others that do care. 543 544May 2, 1996: 545 removed all register declarations. 546 547 enhanced split(), as in gawk, etc: split(s, a, "") splits s into 548 a[1]...a[length(s)] with each character a single element. 549 550 made the same changes for field-splitting if FS is "". 551 552 added nextfile, as in gawk: causes immediate advance to next 553 input file. (thanks to arnold robbins for inspiration and code). 554 555 small fixes to regexpr code: can now handle []], [[], and 556 variants; [] is now a syntax error, rather than matching 557 everything; [z-a] is now empty, not z. far from complete 558 or correct, however. (thanks to jeffrey friedl for pointing out 559 some awful behaviors.) 560 561Apr 29, 1996: 562 replaced uchar by uschar everywhere; apparently some compilers 563 usurp this name and this causes conflicts. 564 565 fixed call to time in run.c (bltin); arg is time_t *. 566 567 replaced horrible pointer/long punning in b.c by a legitimate 568 union. should be safer on 64-bit machines and cleaner everywhere. 569 (thanks to nelson beebe for pointing out some of these problems.) 570 571 replaced nested comments by #if 0...#endif in run.c, lib.c. 572 573 removed getsval, setsval, execute macros from run.c and lib.c. 574 machines are 100x faster than they were when these macros were 575 first used. 576 577 revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l, 578 y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of 579 portability to nameless systems. 580 581 "make bundle" now includes yacc and lex output files for recipients 582 who don't have yacc or lex. 583 584Aug 15, 1995: 585 initialized Cells in setsymtab more carefully; some fields 586 were not set. (thanks to purify, all of whose complaints i 587 think i now understand.) 588 589 fixed at least one error in gsub that looked at -1-th element 590 of an array when substituting for a null match (e.g., $). 591 592 delete arrayname is now legal; it clears the elements but leaves 593 the array, which may not be the right behavior. 594 595 modified makefile: my current make can't cope with the test used 596 to avoid unnecessary yacc invocations. 597 598Jul 17, 1995: 599 added dynamically growing strings to awk.lx.l and b.c 600 to permit regular expressions to be much bigger. 601 the state arrays can still overflow. 602 603Aug 24, 1994: 604 detect duplicate arguments in function definitions (mdm). 605 606May 11, 1994: 607 trivial fix to printf to limit string size in sub(). 608 609Apr 22, 1994: 610 fixed yet another subtle self-assignment problem: 611 $1 = $2; $1 = $1 clobbered $1. 612 613 Regression tests now use private echo, to avoid quoting problems. 614 615Feb 2, 1994: 616 changed error() to print line number as %d, not %g. 617 618Jul 23, 1993: 619 cosmetic changes: increased sizes of some arrays, 620 reworded some error messages. 621 622 added CONVFMT as in posix (just replaced OFMT in getsval) 623 624 FILENAME is now "" until the first thing that causes a file 625 to be opened. 626 627Nov 28, 1992: 628 deleted yyunput and yyoutput from proto.h; 629 different versions of lex give these different declarations. 630 631May 31, 1992: 632 added -mr N and -mf N options: more record and fields. 633 these really ought to adjust automatically. 634 635 cleaned up some error messages; "out of space" now means 636 malloc returned NULL in all cases. 637 638 changed rehash so that if it runs out, it just returns; 639 things will continue to run slow, but maybe a bit longer. 640 641Apr 24, 1992: 642 remove redundant close of stdin when using -f -. 643 644 got rid of core dump with -d; awk -d just prints date. 645 646Apr 12, 1992: 647 added explicit check for /dev/std(in,out,err) in redirection. 648 unlike gawk, no /dev/fd/n yet. 649 650 added (file/pipe) builtin. hard to test satisfactorily. 651 not posix. 652 653Feb 20, 1992: 654 recompile after abortive changes; should be unchanged. 655 656Dec 2, 1991: 657 die-casting time: converted to ansi C, installed that. 658 659Nov 30, 1991: 660 fixed storage leak in freefa, failing to recover [N]CCL. 661 thanks to Bill Jones (jones@cs.usask.ca) 662 663Nov 19, 1991: 664 use RAND_MAX instead of literal in builtin(). 665 666Nov 12, 1991: 667 cranked up some fixed-size arrays in b.c, and added a test for 668 overflow in penter. thanks to mark larsen. 669 670Sep 24, 1991: 671 increased buffer in gsub. a very crude fix to a general problem. 672 and again on Sep 26. 673 674Aug 18, 1991: 675 enforce variable name syntax for commandline variables: has to 676 start with letter or _. 677 678Jul 27, 1991: 679 allow newline after ; in for statements. 680 681Jul 21, 1991: 682 fixed so that in self-assignment like $1=$1, side effects 683 like recomputing $0 take place. (this is getting subtle.) 684 685Jun 30, 1991: 686 better test for detecting too-long output record. 687 688Jun 2, 1991: 689 better defense against very long printf strings. 690 made break and continue illegal outside of loops. 691 692May 13, 1991: 693 removed extra arg on gettemp, tempfree. minor error message rewording. 694 695May 6, 1991: 696 fixed silly bug in hex parsing in hexstr(). 697 removed an apparently unnecessary test in isnumber(). 698 warn about weird printf conversions. 699 fixed unchecked array overwrite in relex(). 700 701 changed for (i in array) to access elements in sorted order. 702 then unchanged it -- it really does run slower in too many cases. 703 left the code in place, commented out. 704 705Feb 10, 1991: 706 check error status on all writes, to avoid banging on full disks. 707 708Jan 28, 1991: 709 awk -f - reads the program from stdin. 710 711Jan 11, 1991: 712 failed to set numeric state on $0 in cmd|getline context in run.c. 713 714Nov 2, 1990: 715 fixed sleazy test for integrality in getsval; use modf. 716 717Oct 29, 1990: 718 fixed sleazy buggy code in lib.c that looked (incorrectly) for 719 too long input lines. 720 721Oct 14, 1990: 722 fixed the bug on p. 198 in which it couldn't deduce that an 723 argument was an array in some contexts. replaced the error 724 message in intest() by code that damn well makes it an array. 725 726Oct 8, 1990: 727 fixed horrible bug: types and values were not preserved in 728 some kinds of self-assignment. (in assign().) 729 730Aug 24, 1990: 731 changed NCHARS to 256 to handle 8-bit characters in strings 732 presented to match(), etc. 733 734Jun 26, 1990: 735 changed struct rrow (awk.h) to use long instead of int for lval, 736 since cfoll() stores a pointer in it. now works better when int's 737 are smaller than pointers! 738 739May 6, 1990: 740 AVA fixed the grammar so that ! is uniformly of the same precedence as 741 unary + and -. This renders illegal some constructs like !x=y, which 742 now has to be parenthesized as !(x=y), and makes others work properly: 743 !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements. 744 (These problems were pointed out by Bob Lenk of Posix.) 745 746 Added \x to regular expressions (already in strings). 747 Limited octal to octal digits; \8 and \9 are not octal. 748 Centralized the code for parsing escapes in regular expressions. 749 Added a bunch of tests to T.re and T.sub to verify some of this. 750 751Feb 9, 1990: 752 fixed null pointer dereference bug in main.c: -F[nothing]. sigh. 753 754 restored srand behavior: it returns the current seed. 755 756Jan 18, 1990: 757 srand now returns previous seed value (0 to start). 758 759Jan 5, 1990: 760 fix potential problem in tran.c -- something was freed, 761 then used in freesymtab. 762 763Oct 18, 1989: 764 another try to get the max number of open files set with 765 relatively machine-independent code. 766 767 small fix to input() in case of multiple reads after EOF. 768 769Oct 11, 1989: 770 FILENAME is now defined in the BEGIN block -- too many old 771 programs broke. 772 773 "-" means stdin in getline as well as on the commandline. 774 775 added a bunch of casts to the code to tell the truth about 776 char * vs. unsigned char *, a right royal pain. added a 777 setlocale call to the front of main, though probably no one 778 has it usefully implemented yet. 779 780Aug 24, 1989: 781 removed redundant relational tests against nullnode if parse 782 tree already had a relational at that point. 783 784Aug 11, 1989: 785 fixed bug: commandline variable assignment has to look like 786 var=something. (consider the man page for =, in file =.1) 787 788 changed number of arguments to functions to static arrays 789 to avoid repeated malloc calls. 790 791Aug 2, 1989: 792 restored -F (space) separator 793 794Jul 30, 1989: 795 added -v x=1 y=2 ... for immediate commandline variable assignment; 796 done before the BEGIN block for sure. they have to precede the 797 program if the program is on the commandline. 798 Modified Aug 2 to require a separate -v for each assignment. 799 800Jul 10, 1989: 801 fixed ref-thru-zero bug in environment code in tran.c 802 803Jun 23, 1989: 804 add newline to usage message. 805 806Jun 14, 1989: 807 added some missing ansi printf conversion letters: %i %X %E %G. 808 no sensible meaning for h or L, so they may not do what one expects. 809 810 made %* conversions work. 811 812 changed x^y so that if n is a positive integer, it's done 813 by explicit multiplication, thus achieving maximum accuracy. 814 (this should be done by pow() but it seems not to be locally.) 815 done to x ^= y as well. 816 817Jun 4, 1989: 818 ENVIRON array contains environment: if shell variable V=thing, 819 ENVIRON["V"] is "thing" 820 821 multiple -f arguments permitted. error reporting is naive. 822 (they were permitted before, but only the last was used.) 823 824 fixed a really stupid botch in the debugging macro dprintf 825 826 fixed order of evaluation of commandline assignments to match 827 what the book claims: an argument of the form x=e is evaluated 828 at the time it would have been opened if it were a filename (p 63). 829 this invalidates the suggested answer to ex 4-1 (p 195). 830 831 removed some code that permitted -F (space) fieldseparator, 832 since it didn't quite work right anyway. (restored aug 2) 833 834Apr 27, 1989: 835 Line number now accumulated correctly for comment lines. 836 837Apr 26, 1989: 838 Debugging output now includes a version date, 839 if one compiles it into the source each time. 840 841Apr 9, 1989: 842 Changed grammar to prohibit constants as 3rd arg of sub and gsub; 843 prevents class of overwriting-a-constant errors. (Last one?) 844 This invalidates the "banana" example on page 43 of the book. 845 846 Added \a ("alert"), \v (vertical tab), \xhhh (hexadecimal), 847 as in ANSI, for strings. Rescinded the sloppiness that permitted 848 non-octal digits in \ooo. Warning: not all compilers and libraries 849 will be able to deal with \x correctly. 850 851Jan 9, 1989: 852 Fixed bug that caused tempcell list to contain a duplicate. 853 The fix is kludgy. 854 855Dec 17, 1988: 856 Catches some more commandline errors in main. 857 Removed redundant decl of modf in run.c (confuses some compilers). 858 Warning: there's no single declaration of malloc, etc., in awk.h 859 that seems to satisfy all compilers. 860 861Dec 7, 1988: 862 Added a bit of code to error printing to avoid printing nulls. 863 (Not clear that it actually would.) 864 865Nov 27, 1988: 866 With fear and trembling, modified the grammar to permit 867 multiple pattern-action statements on one line without 868 an explicit separator. By definition, this capitulation 869 to the ghost of ancient implementations remains undefined 870 and thus subject to change without notice or apology. 871 DO NOT COUNT ON IT. 872 873Oct 30, 1988: 874 Fixed bug in call() that failed to recover storage. 875 876 A warning is now generated if there are more arguments 877 in the call than in the definition (in lieu of fixing 878 another storage leak). 879 880Oct 20, 1988: 881 Fixed %c: if expr is numeric, use numeric value; 882 otherwise print 1st char of string value. still 883 doesn't work if the value is 0 -- won't print \0. 884 885 Added a few more checks for running out of malloc. 886 887Oct 12, 1988: 888 Fixed bug in call() that freed local arrays twice. 889 890 Fixed to handle deletion of non-existent array right; 891 complains about attempt to delete non-array element. 892 893Sep 30, 1988: 894 Now guarantees to evaluate all arguments of built-in 895 functions, as in C; the appearance is that arguments 896 are evaluated before the function is called. Places 897 affected are sub (gsub was ok), substr, printf, and 898 all the built-in arithmetic functions in bltin(). 899 A warning is generated if a bltin() is called with 900 the wrong number of arguments. 901 902 This requires changing makeprof on p167 of the book. 903 904Aug 23, 1988: 905 setting FILENAME in BEGIN caused core dump, apparently 906 because it was freeing space not allocated by malloc. 907 908July 24, 1988: 909 fixed egregious error in toupper/tolower functions. 910 still subject to rescinding, however. 911 912July 2, 1988: 913 flush stdout before opening file or pipe 914 915July 2, 1988: 916 performance bug in b.c/cgoto(): not freeing some sets of states. 917 partial fix only right now, and the number of states increased 918 to make it less obvious. 919 920June 1, 1988: 921 check error status on close 922 923May 28, 1988: 924 srand returns seed value it's using. 925 see 1/18/90 926 927May 22, 1988: 928 Removed limit on depth of function calls. 929 930May 10, 1988: 931 Fixed lib.c to permit _ in commandline variable names. 932 933Mar 25, 1988: 934 main.c fixed to recognize -- as terminator of command- 935 line options. Illegal options flagged. 936 Error reporting slightly cleaned up. 937 938Dec 2, 1987: 939 Newer C compilers apply a strict scope rule to extern 940 declarations within functions. Two extern declarations in 941 lib.c and tran.c have been moved to obviate this problem. 942 943Oct xx, 1987: 944 Reluctantly added toupper and tolower functions. 945 Subject to rescinding without notice. 946 947Sep 17, 1987: 948 Error-message printer had printf(s) instead of 949 printf("%s",s); got core dumps when the message 950 included a %. 951 952Sep 12, 1987: 953 Very long printf strings caused core dump; 954 fixed aprintf, asprintf, format to catch them. 955 Can still get a core dump in printf itself. 956 957 958