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