/****************************************************************Copyright (C) Lucent Technologies 1997All Rights Reserved Permission to use, copy, modify, and distribute this software andits documentation for any purpose and without fee is herebygranted, provided that the above copyright notice appear in allcopies and that both that the copyright notice and thispermission notice and warranty disclaimer appear in supportingdocumentation, and that the name Lucent Technologies or any ofits entities not be used in advertising or publicity pertainingto distribution of the software without specific, written priorpermission. LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANYSPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGESWHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHERIN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OFTHIS SOFTWARE.****************************************************************/ This file lists all bug fixes, changes, etc., made since the AWK bookwas sent to the printers in August, 1987. Nov 15, 2000: fixed a bug introduced in august 1997 that caused expressions like $f[1] to be syntax errors. thanks to arnold robbins for noticing this and providing a fix. Oct 30, 2000: fixed some nextfile bugs: not handling all cases. thanks to arnold robbins for pointing this out. new regressions added. close() is now a function. it returns whatever the library fclose returns, and -1 for closing a file or pipe that wasn't opened. Sep 24, 2000: permit \n explicitly in character classes; won't work right if comes in as "[\n]" but ok as /[\n]/, because of multiple processing of \'s. thanks to arnold robbins. July 5, 2000: minor fiddles in tran.c to keep compilers happy about uschar. thanks to norman wilson. May 25, 2000: yet another attempt at making 8-bit input work, with another band-aid in b.c (member()), and some (uschar) casts to head off potential errors in subscripts (like isdigit). also changed HAT to NCHARS-2. thanks again to santiago vila. changed maketab.c to ignore apparently out of range definitions instead of halting; new freeBSD generates one. thanks to jon snader <jsnader@ix.netcom.com> for pointing out the problem. May 2, 2000: fixed an 8-bit problem in b.c by making several char*'s into unsigned char*'s. not clear i have them all yet. thanks to Santiago Vila <sanvila@unex.es> for the bug report. Apr 21, 2000: finally found and fixed a memory leak in function call; it's been there since functions were added ~1983. thanks to jon bentley for the test case that found it. added test in envinit to catch environment "variables" with names begining with '='; thanks to Berend Hasselman. Jul 28, 1999: added test in defn() to catch function foo(foo), which otherwise recurses until core dump. thanks to arnold robbins for noticing this. Jun 20, 1999: added *bp in gettok in lex.c; appears possible to exit function without terminating the string. thanks to russ cox. Jun 2, 1999: added function stdinit() to run to initialize files[] array, in case stdin, etc., are not constants; some compilers care. May 10, 1999: replaced the ERROR ... FATAL, etc., macros with functions based on vprintf, to avoid problems caused by overrunning fixed-size errbuf array. thanks to ralph corderoy for the impetus, and for pointing out a string termination bug in qstring as well. Apr 21, 1999: fixed bug that caused occasional core dumps with commandline variable with value ending in \. (thanks to nelson beebe for the test case.) Apr 16, 1999: with code kindly provided by Bruce Lilly, awk now parses /=/ and similar constructs more sensibly in more places. Bruce also provided some helpful test cases. Apr 5, 1999: changed true/false to True/False in run.c to make it easier to compile with C++. Added some casts on malloc and realloc to be honest about casts; ditto. changed ltype int to long in struct rrow to reduce some 64-bit complaints; other changes scattered throughout for the same purpose. thanks to Nelson Beebe for these portability improvements. removed some horrible pointer-int casting in b.c and elsewhere by adding ptoi and itonp to localize the casts, which are all benign. fixed one incipient bug that showed up on sgi in 64-bit mode. reset lineno for new source file; include filename in error message. also fixed line number error in continuation lines. (thanks to Nelson Beebe for both of these.) Mar 24, 1999: Nelson Beebe notes that irix 5.3 yacc dies with a bogus error; use a newer version or switch to bison, since sgi is unlikely to fix it. Mar 5, 1999: changed isnumber to is_number to avoid the problem caused by versions of ctype.h that include the name isnumber. distribution now includes a script for building on a Mac, thanks to Dan Allen. Feb 20, 1999: fixed memory leaks in run.c (call) and tran.c (setfval). thanks to Stephen Nutt for finding these and providing the fixes. Jan 13, 1999: replaced srand argument by (unsigned int) in run.c; avoids problem on Mac and potentially on Unix & Windows. thanks to Dan Allen. added a few (int) casts to silence useless compiler warnings. e.g., errorflag= in run.c jump(). added proctab.c to the bundle outout; one less thing to have to compile out of the box. added calls to _popen and _pclose to the win95 stub for pipes (thanks to Steve Adams for this helpful suggestion). seems to work, though properties are not well understood by me, and it appears that under some circumstances the pipe output is truncated. Be careful. Oct 19, 1998: fixed a couple of bugs in getrec: could fail to update $0 after a getline var; because inputFS wasn't initialized, could split $0 on every character, a misleading diversion. fixed caching bug in makedfa: LRU was actually removing least often used. thanks to ross ridge for finding these, and for providing great bug reports. May 12, 1998: fixed potential bug in readrec: might fail to update record pointer after growing. thanks to dan levy for spotting this and suggesting the fix. Mar 12, 1998: added -V to print version number and die. Feb 11, 1998: subtle silent bug in lex.c: if the program ended with a number longer than 1 digit, part of the input would be pushed back and parsed again because token buffer wasn't terminated right. example: awk 'length($0) > 10'. blush. at least i found it myself. Aug 31, 1997: s/adelete/awkdelete/: SGI uses this in malloc.h. thanks to nelson beebe for pointing this one out. Aug 21, 1997: fixed some bugs in sub and gsub when replacement includes \\. this is a dark, horrible corner, but at least now i believe that the behavior is the same as gawk and the intended posix standard. thanks to arnold robbins for advice here. Aug 9, 1997: somewhat regretfully, replaced the ancient lex-based lexical analyzer with one written in C. it's longer, generates less code, and more portable; the old one depended too much on mysterious properties of lex that were not preserved in other environments. in theory these recognize the same language. now using strtod to test whether a string is a number, instead of the convoluted original function. should be more portable and reliable if strtod is implemented right. removed now-pointless optimization in makefile that tries to avoid recompilation when awkgram.y is changed but symbols are not. removed most fixed-size arrays, though a handful remain, some of which are unchecked. you have been warned. Aug 4, 1997: with some trepidation, replaced the ancient code that managed fields and $0 in fixed-size arrays with arrays that grow on demand. there is still some tension between trying to make this run fast and making it clean; not sure it's right yet. the ill-conceived -mr and -mf arguments are now useful only for debugging. previous dynamic string code removed. numerous other minor cleanups along the way. Jul 30, 1997: using code provided by dan levy (to whom profuse thanks), replaced fixed-size arrays and awkward kludges by a fairly uniform mechanism to grow arrays as needed for printf, sub, gsub, etc. Jul 23, 1997: falling off the end of a function returns "" and 0, not 0. thanks to arnold robbins. Jun 17, 1997: replaced several fixed-size arrays by dynamically-created ones in run.c; added overflow tests to some previously unchecked cases. getline, toupper, tolower. getline code is still broken in that recursive calls may wind up using the same space. [fixed later] increased RECSIZE to 8192 to push problems further over the horizon. added \r to \n as input line separator for programs, not data. damn CRLFs. modified format() to permit explicit printf("%c", 0) to include a null byte in output. thanks to ken stailey for the fix. added a "-safe" argument that disables file output (print >, print >>), process creation (cmd|getline, print |, system), and access to the environment (ENVIRON). this is a first approximation to a "safe" version of awk, but don't rely on it too much. thanks to joan feigenbaum and matt blaze for the inspiration long ago. Jul 8, 1996: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to ralph corderoy. Jun 29, 1996: fixed awful bug in new field splitting; didn't get all the places where input was done. Jun 28, 1996: changed field-splitting to conform to posix definition: fields are split using the value of FS at the time of input; it used to be the value when the field or NF was first referred to, a much less predictable definition. thanks to arnold robbins for encouragement to do the right thing. May 28, 1996: fixed appalling but apparently unimportant bug in parsing octal numbers in reg exprs. explicit hex in reg exprs now limited to 2 chars: \xa, \xaa. May 27, 1996: cleaned up some declarations so gcc -Wall is now almost silent. makefile now includes backup copies of ytab.c and lexyy.c in case one makes before looking; it also avoids recreating lexyy.c unless really needed. s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes with unwisely-written header files. thanks to jeffrey friedl for several of these. May 26, 1996: an attempt to rationalize the (unsigned) char issue. almost all instances of unsigned char have been removed; the handful of places in b.c where chars are used as table indices have been hand-crafted. added some latin-1 tests to the regression, but i'm not confident; none of my compilers seem to care much. thanks to nelson beebe for pointing out some others that do care. May 2, 1996: removed all register declarations. enhanced split(), as in gawk, etc: split(s, a, "") splits s into a[1]...a[length(s)] with each character a single element. made the same changes for field-splitting if FS is "". added nextfile, as in gawk: causes immediate advance to next input file. (thanks to arnold robbins for inspiration and code). small fixes to regexpr code: can now handle []], [[], and variants; [] is now a syntax error, rather than matching everything; [z-a] is now empty, not z. far from complete or correct, however. (thanks to jeffrey friedl for pointing out some awful behaviors.) Apr 29, 1996: replaced uchar by uschar everwhere; apparently some compilers usurp this name and this causes conflicts. fixed call to time in run.c (bltin); arg is time_t *. replaced horrible pointer/long punning in b.c by a legitimate union. should be safer on 64-bit machines and cleaner everywhere. (thanks to nelson beebe for pointing out some of these problems.) replaced nested comments by #if 0...#endif in run.c, lib.c. removed getsval, setsval, execute macros from run.c and lib.c. machines are 100x faster than they were when these macros were first used. revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l, y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of portability to nameless systems. "make bundle" now includes yacc and lex output files for recipients who don't have yacc or lex. Aug 15, 1995: initialized Cells in setsymtab more carefully; some fields were not set. (thanks to purify, all of whose complaints i think i now understand.) fixed at least one error in gsub that looked at -1-th element of an array when substituting for a null match (e.g., $). delete arrayname is now legal; it clears the elements but leaves the array, which may not be the right behavior. modified makefile: my current make can't cope with the test used to avoid unnecessary yacc invocations. Jul 17, 1995: added dynamically growing strings to awk.lx.l and b.c to permit regular expressions to be much bigger. the state arrays can still overflow. Aug 24, 1994: detect duplicate arguments in function definitions (mdm). May 11, 1994: trivial fix to printf to limit string size in sub(). Apr 22, 1994: fixed yet another subtle self-assignment problem: $1 = $2; $1 = $1 clobbered $1. Regression tests now use private echo, to avoid quoting problems. Feb 2, 1994: changed error() to print line number as %d, not %g. Jul 23, 1993: cosmetic changes: increased sizes of some arrays, reworded some error messages. added CONVFMT as in posix (just replaced OFMT in getsval) FILENAME is now "" until the first thing that causes a file to be opened. Nov 28, 1992: deleted yyunput and yyoutput from proto.h; different versions of lex give these different declarations. May 31, 1992: added -mr N and -mf N options: more record and fields. these really ought to adjust automatically. cleaned up some error messages; "out of space" now means malloc returned NULL in all cases. changed rehash so that if it runs out, it just returns; things will continue to run slow, but maybe a bit longer. Apr 24, 1992: remove redundant close of stdin when using -f -. got rid of core dump with -d; awk -d just prints date. Apr 12, 1992: added explicit check for /dev/std(in,out,err) in redirection. unlike gawk, no /dev/fd/n yet. added (file/pipe) builtin. hard to test satisfactorily. not posix. Feb 20, 1992: recompile after abortive changes; should be unchanged. Dec 2, 1991: die-casting time: converted to ansi C, installed that. Nov 30, 1991: fixed storage leak in freefa, failing to recover [N]CCL. thanks to Bill Jones (jones@cs.usask.ca) Nov 19, 1991: use RAND_MAX instead of literal in builtin(). Nov 12, 1991: cranked up some fixed-size arrays in b.c, and added a test for overflow in penter. thanks to mark larsen. Sep 24, 1991: increased buffer in gsub. a very crude fix to a general problem. and again on Sep 26. Aug 18, 1991: enforce variable name syntax for commandline variables: has to start with letter or _. Jul 27, 1991: allow newline after ; in for statements. Jul 21, 1991: fixed so that in self-assignment like $1=$1, side effects like recomputing $0 take place. (this is getting subtle.) Jun 30, 1991: better test for detecting too-long output record. Jun 2, 1991: better defense against very long printf strings. made break and continue illegal outside of loops. May 13, 1991: removed extra arg on gettemp, tempfree. minor error message rewording. May 6, 1991: fixed silly bug in hex parsing in hexstr(). removed an apparently unnecessary test in isnumber(). warn about weird printf conversions. fixed unchecked array overwrite in relex(). changed for (i in array) to access elements in sorted order. then unchanged it -- it really does run slower in too many cases. left the code in place, commented out. Feb 10, 1991: check error status on all writes, to avoid banging on full disks. Jan 28, 1991: awk -f - reads the program from stdin. Jan 11, 1991: failed to set numeric state on $0 in cmd|getline context in run.c. Nov 2, 1990: fixed sleazy test for integrality in getsval; use modf. Oct 29, 1990: fixed sleazy buggy code in lib.c that looked (incorrectly) for too long input lines. Oct 14, 1990: fixed the bug on p. 198 in which it couldn't deduce that an argument was an array in some contexts. replaced the error message in intest() by code that damn well makes it an array. Oct 8, 1990: fixed horrible bug: types and values were not preserved in some kinds of self-assignment. (in assign().) Aug 24, 1990: changed NCHARS to 256 to handle 8-bit characters in strings presented to match(), etc. Jun 26, 1990: changed struct rrow (awk.h) to use long instead of int for lval, since cfoll() stores a pointer in it. now works better when int's are smaller than pointers! May 6, 1990: AVA fixed the grammar so that ! is uniformly of the same precedence as unary + and -. This renders illegal some constructs like !x=y, which now has to be parenthesized as !(x=y), and makes others work properly: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements. (These problems were pointed out by Bob Lenk of Posix.) Added \x to regular expressions (already in strings). Limited octal to octal digits; \8 and \9 are not octal. Centralized the code for parsing escapes in regular expressions. Added a bunch of tests to T.re and T.sub to verify some of this. Feb 9, 1990: fixed null pointer dereference bug in main.c: -F[nothing]. sigh. restored srand behavior: it returns the current seed.Lines 1–500 of 703. Load more
/**************************************************************** Copyright (C) Lucent Technologies 1997 All Rights Reserved Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that the copyright notice and this permission notice and warranty disclaimer appear in supporting documentation, and that the name Lucent Technologies or any of its entities not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ****************************************************************/ This file lists all bug fixes, changes, etc., made since the AWK book was sent to the printers in August, 1987. Nov 15, 2000: fixed a bug introduced in august 1997 that caused expressions like $f[1] to be syntax errors. thanks to arnold robbins for noticing this and providing a fix. Oct 30, 2000: fixed some nextfile bugs: not handling all cases. thanks to arnold robbins for pointing this out. new regressions added. close() is now a function. it returns whatever the library fclose returns, and -1 for closing a file or pipe that wasn't opened. Sep 24, 2000: permit \n explicitly in character classes; won't work right if comes in as "[\n]" but ok as /[\n]/, because of multiple processing of \'s. thanks to arnold robbins. July 5, 2000: minor fiddles in tran.c to keep compilers happy about uschar. thanks to norman wilson. May 25, 2000: yet another attempt at making 8-bit input work, with another band-aid in b.c (member()), and some (uschar) casts to head off potential errors in subscripts (like isdigit). also changed HAT to NCHARS-2. thanks again to santiago vila. changed maketab.c to ignore apparently out of range definitions instead of halting; new freeBSD generates one. thanks to jon snader <jsnader@ix.netcom.com> for pointing out the problem. May 2, 2000: fixed an 8-bit problem in b.c by making several char*'s into unsigned char*'s. not clear i have them all yet. thanks to Santiago Vila <sanvila@unex.es> for the bug report. Apr 21, 2000: finally found and fixed a memory leak in function call; it's been there since functions were added ~1983. thanks to jon bentley for the test case that found it. added test in envinit to catch environment "variables" with names begining with '='; thanks to Berend Hasselman. Jul 28, 1999: added test in defn() to catch function foo(foo), which otherwise recurses until core dump. thanks to arnold robbins for noticing this. Jun 20, 1999: added *bp in gettok in lex.c; appears possible to exit function without terminating the string. thanks to russ cox. Jun 2, 1999: added function stdinit() to run to initialize files[] array, in case stdin, etc., are not constants; some compilers care. May 10, 1999: replaced the ERROR ... FATAL, etc., macros with functions based on vprintf, to avoid problems caused by overrunning fixed-size errbuf array. thanks to ralph corderoy for the impetus, and for pointing out a string termination bug in qstring as well. Apr 21, 1999: fixed bug that caused occasional core dumps with commandline variable with value ending in \. (thanks to nelson beebe for the test case.) Apr 16, 1999: with code kindly provided by Bruce Lilly, awk now parses /=/ and similar constructs more sensibly in more places. Bruce also provided some helpful test cases. Apr 5, 1999: changed true/false to True/False in run.c to make it easier to compile with C++. Added some casts on malloc and realloc to be honest about casts; ditto. changed ltype int to long in struct rrow to reduce some 64-bit complaints; other changes scattered throughout for the same purpose. thanks to Nelson Beebe for these portability improvements. removed some horrible pointer-int casting in b.c and elsewhere by adding ptoi and itonp to localize the casts, which are all benign. fixed one incipient bug that showed up on sgi in 64-bit mode. reset lineno for new source file; include filename in error message. also fixed line number error in continuation lines. (thanks to Nelson Beebe for both of these.) Mar 24, 1999: Nelson Beebe notes that irix 5.3 yacc dies with a bogus error; use a newer version or switch to bison, since sgi is unlikely to fix it. Mar 5, 1999: changed isnumber to is_number to avoid the problem caused by versions of ctype.h that include the name isnumber. distribution now includes a script for building on a Mac, thanks to Dan Allen. Feb 20, 1999: fixed memory leaks in run.c (call) and tran.c (setfval). thanks to Stephen Nutt for finding these and providing the fixes. Jan 13, 1999: replaced srand argument by (unsigned int) in run.c; avoids problem on Mac and potentially on Unix & Windows. thanks to Dan Allen. added a few (int) casts to silence useless compiler warnings. e.g., errorflag= in run.c jump(). added proctab.c to the bundle outout; one less thing to have to compile out of the box. added calls to _popen and _pclose to the win95 stub for pipes (thanks to Steve Adams for this helpful suggestion). seems to work, though properties are not well understood by me, and it appears that under some circumstances the pipe output is truncated. Be careful. Oct 19, 1998: fixed a couple of bugs in getrec: could fail to update $0 after a getline var; because inputFS wasn't initialized, could split $0 on every character, a misleading diversion. fixed caching bug in makedfa: LRU was actually removing least often used. thanks to ross ridge for finding these, and for providing great bug reports. May 12, 1998: fixed potential bug in readrec: might fail to update record pointer after growing. thanks to dan levy for spotting this and suggesting the fix. Mar 12, 1998: added -V to print version number and die. Feb 11, 1998: subtle silent bug in lex.c: if the program ended with a number longer than 1 digit, part of the input would be pushed back and parsed again because token buffer wasn't terminated right. example: awk 'length($0) > 10'. blush. at least i found it myself. Aug 31, 1997: s/adelete/awkdelete/: SGI uses this in malloc.h. thanks to nelson beebe for pointing this one out. Aug 21, 1997: fixed some bugs in sub and gsub when replacement includes \\. this is a dark, horrible corner, but at least now i believe that the behavior is the same as gawk and the intended posix standard. thanks to arnold robbins for advice here. Aug 9, 1997: somewhat regretfully, replaced the ancient lex-based lexical analyzer with one written in C. it's longer, generates less code, and more portable; the old one depended too much on mysterious properties of lex that were not preserved in other environments. in theory these recognize the same language. now using strtod to test whether a string is a number, instead of the convoluted original function. should be more portable and reliable if strtod is implemented right. removed now-pointless optimization in makefile that tries to avoid recompilation when awkgram.y is changed but symbols are not. removed most fixed-size arrays, though a handful remain, some of which are unchecked. you have been warned. Aug 4, 1997: with some trepidation, replaced the ancient code that managed fields and $0 in fixed-size arrays with arrays that grow on demand. there is still some tension between trying to make this run fast and making it clean; not sure it's right yet. the ill-conceived -mr and -mf arguments are now useful only for debugging. previous dynamic string code removed. numerous other minor cleanups along the way. Jul 30, 1997: using code provided by dan levy (to whom profuse thanks), replaced fixed-size arrays and awkward kludges by a fairly uniform mechanism to grow arrays as needed for printf, sub, gsub, etc. Jul 23, 1997: falling off the end of a function returns "" and 0, not 0. thanks to arnold robbins. Jun 17, 1997: replaced several fixed-size arrays by dynamically-created ones in run.c; added overflow tests to some previously unchecked cases. getline, toupper, tolower. getline code is still broken in that recursive calls may wind up using the same space. [fixed later] increased RECSIZE to 8192 to push problems further over the horizon. added \r to \n as input line separator for programs, not data. damn CRLFs. modified format() to permit explicit printf("%c", 0) to include a null byte in output. thanks to ken stailey for the fix. added a "-safe" argument that disables file output (print >, print >>), process creation (cmd|getline, print |, system), and access to the environment (ENVIRON). this is a first approximation to a "safe" version of awk, but don't rely on it too much. thanks to joan feigenbaum and matt blaze for the inspiration long ago. Jul 8, 1996: fixed long-standing bug in sub, gsub(/a/, "\\\\&"); thanks to ralph corderoy. Jun 29, 1996: fixed awful bug in new field splitting; didn't get all the places where input was done. Jun 28, 1996: changed field-splitting to conform to posix definition: fields are split using the value of FS at the time of input; it used to be the value when the field or NF was first referred to, a much less predictable definition. thanks to arnold robbins for encouragement to do the right thing. May 28, 1996: fixed appalling but apparently unimportant bug in parsing octal numbers in reg exprs. explicit hex in reg exprs now limited to 2 chars: \xa, \xaa. May 27, 1996: cleaned up some declarations so gcc -Wall is now almost silent. makefile now includes backup copies of ytab.c and lexyy.c in case one makes before looking; it also avoids recreating lexyy.c unless really needed. s/aprintf/awkprint, s/asprintf/awksprintf/ to avoid some name clashes with unwisely-written header files. thanks to jeffrey friedl for several of these. May 26, 1996: an attempt to rationalize the (unsigned) char issue. almost all instances of unsigned char have been removed; the handful of places in b.c where chars are used as table indices have been hand-crafted. added some latin-1 tests to the regression, but i'm not confident; none of my compilers seem to care much. thanks to nelson beebe for pointing out some others that do care. May 2, 1996: removed all register declarations. enhanced split(), as in gawk, etc: split(s, a, "") splits s into a[1]...a[length(s)] with each character a single element. made the same changes for field-splitting if FS is "". added nextfile, as in gawk: causes immediate advance to next input file. (thanks to arnold robbins for inspiration and code). small fixes to regexpr code: can now handle []], [[], and variants; [] is now a syntax error, rather than matching everything; [z-a] is now empty, not z. far from complete or correct, however. (thanks to jeffrey friedl for pointing out some awful behaviors.) Apr 29, 1996: replaced uchar by uschar everwhere; apparently some compilers usurp this name and this causes conflicts. fixed call to time in run.c (bltin); arg is time_t *. replaced horrible pointer/long punning in b.c by a legitimate union. should be safer on 64-bit machines and cleaner everywhere. (thanks to nelson beebe for pointing out some of these problems.) replaced nested comments by #if 0...#endif in run.c, lib.c. removed getsval, setsval, execute macros from run.c and lib.c. machines are 100x faster than they were when these macros were first used. revised filenames: awk.g.y => awkgram.y, awk.lx.l => awklex.l, y.tab.[ch] => ytab.[ch], lex.yy.c => lexyy.c, all in the aid of portability to nameless systems. "make bundle" now includes yacc and lex output files for recipients who don't have yacc or lex. Aug 15, 1995: initialized Cells in setsymtab more carefully; some fields were not set. (thanks to purify, all of whose complaints i think i now understand.) fixed at least one error in gsub that looked at -1-th element of an array when substituting for a null match (e.g., $). delete arrayname is now legal; it clears the elements but leaves the array, which may not be the right behavior. modified makefile: my current make can't cope with the test used to avoid unnecessary yacc invocations. Jul 17, 1995: added dynamically growing strings to awk.lx.l and b.c to permit regular expressions to be much bigger. the state arrays can still overflow. Aug 24, 1994: detect duplicate arguments in function definitions (mdm). May 11, 1994: trivial fix to printf to limit string size in sub(). Apr 22, 1994: fixed yet another subtle self-assignment problem: $1 = $2; $1 = $1 clobbered $1. Regression tests now use private echo, to avoid quoting problems. Feb 2, 1994: changed error() to print line number as %d, not %g. Jul 23, 1993: cosmetic changes: increased sizes of some arrays, reworded some error messages. added CONVFMT as in posix (just replaced OFMT in getsval) FILENAME is now "" until the first thing that causes a file to be opened. Nov 28, 1992: deleted yyunput and yyoutput from proto.h; different versions of lex give these different declarations. May 31, 1992: added -mr N and -mf N options: more record and fields. these really ought to adjust automatically. cleaned up some error messages; "out of space" now means malloc returned NULL in all cases. changed rehash so that if it runs out, it just returns; things will continue to run slow, but maybe a bit longer. Apr 24, 1992: remove redundant close of stdin when using -f -. got rid of core dump with -d; awk -d just prints date. Apr 12, 1992: added explicit check for /dev/std(in,out,err) in redirection. unlike gawk, no /dev/fd/n yet. added (file/pipe) builtin. hard to test satisfactorily. not posix. Feb 20, 1992: recompile after abortive changes; should be unchanged. Dec 2, 1991: die-casting time: converted to ansi C, installed that. Nov 30, 1991: fixed storage leak in freefa, failing to recover [N]CCL. thanks to Bill Jones (jones@cs.usask.ca) Nov 19, 1991: use RAND_MAX instead of literal in builtin(). Nov 12, 1991: cranked up some fixed-size arrays in b.c, and added a test for overflow in penter. thanks to mark larsen. Sep 24, 1991: increased buffer in gsub. a very crude fix to a general problem. and again on Sep 26. Aug 18, 1991: enforce variable name syntax for commandline variables: has to start with letter or _. Jul 27, 1991: allow newline after ; in for statements. Jul 21, 1991: fixed so that in self-assignment like $1=$1, side effects like recomputing $0 take place. (this is getting subtle.) Jun 30, 1991: better test for detecting too-long output record. Jun 2, 1991: better defense against very long printf strings. made break and continue illegal outside of loops. May 13, 1991: removed extra arg on gettemp, tempfree. minor error message rewording. May 6, 1991: fixed silly bug in hex parsing in hexstr(). removed an apparently unnecessary test in isnumber(). warn about weird printf conversions. fixed unchecked array overwrite in relex(). changed for (i in array) to access elements in sorted order. then unchanged it -- it really does run slower in too many cases. left the code in place, commented out. Feb 10, 1991: check error status on all writes, to avoid banging on full disks. Jan 28, 1991: awk -f - reads the program from stdin. Jan 11, 1991: failed to set numeric state on $0 in cmd|getline context in run.c. Nov 2, 1990: fixed sleazy test for integrality in getsval; use modf. Oct 29, 1990: fixed sleazy buggy code in lib.c that looked (incorrectly) for too long input lines. Oct 14, 1990: fixed the bug on p. 198 in which it couldn't deduce that an argument was an array in some contexts. replaced the error message in intest() by code that damn well makes it an array. Oct 8, 1990: fixed horrible bug: types and values were not preserved in some kinds of self-assignment. (in assign().) Aug 24, 1990: changed NCHARS to 256 to handle 8-bit characters in strings presented to match(), etc. Jun 26, 1990: changed struct rrow (awk.h) to use long instead of int for lval, since cfoll() stores a pointer in it. now works better when int's are smaller than pointers! May 6, 1990: AVA fixed the grammar so that ! is uniformly of the same precedence as unary + and -. This renders illegal some constructs like !x=y, which now has to be parenthesized as !(x=y), and makes others work properly: !x+y is (!x)+y, and x!y is x !y, not two pattern-action statements. (These problems were pointed out by Bob Lenk of Posix.) Added \x to regular expressions (already in strings). Limited octal to octal digits; \8 and \9 are not octal. Centralized the code for parsing escapes in regular expressions. Added a bunch of tests to T.re and T.sub to verify some of this. Feb 9, 1990: fixed null pointer dereference bug in main.c: -F[nothing]. sigh. restored srand behavior: it returns the current seed.