diff options
| -rw-r--r-- | ChangeLog | 33 | ||||
| -rw-r--r-- | Makefile.in | 2 | ||||
| -rw-r--r-- | NEWS | 12 | ||||
| -rw-r--r-- | TODO | 204 | ||||
| -rw-r--r-- | awk.h | 1 | ||||
| -rw-r--r-- | builtin.c | 57 | ||||
| -rwxr-xr-x | configure | 20 | ||||
| -rw-r--r-- | configure.ac | 2 | ||||
| -rw-r--r-- | doc/ChangeLog | 5 | ||||
| -rw-r--r-- | doc/gawk.1 | 10 | ||||
| -rw-r--r-- | doc/gawk.info | 731 | ||||
| -rw-r--r-- | doc/gawk.texi | 16 | ||||
| -rw-r--r-- | doc/gawktexi.in | 16 | ||||
| -rw-r--r-- | main.c | 4 | ||||
| -rw-r--r-- | str_array.c | 79 | ||||
| -rw-r--r-- | test/ChangeLog | 6 | ||||
| -rw-r--r-- | test/Makefile.am | 10 | ||||
| -rw-r--r-- | test/Makefile.in | 9 | ||||
| -rw-r--r-- | test/rand.ok | 2 | ||||
| -rw-r--r-- | test/randtest.ok | 0 | ||||
| -rwxr-xr-x | test/randtest.sh | 113 | ||||
| -rw-r--r-- | version.c | 2 |
22 files changed, 946 insertions, 388 deletions
@@ -44,6 +44,11 @@ * main.c (main): Ignore SIGPIPE. See the comment in the code. Thanks to Alan Broder for reporting the issue. + Unrelated: + + * rand.c (do_rand): Fix computation and loop checking against + 1.0 to use do..while. + 2013-10-16 Arnold D. Robbins <arnold@skeeve.com> Make -O work again. Turns out that C99 bool variables @@ -61,6 +66,11 @@ * re.c (resetup): Add a comment about the joy of syntax bits. + Unrelated: + + * builtin.c (do_rand): If result is exactly 1.0, keep trying. + Thanks to Nelson Beebe. + 2013-10-10 Arnold D. Robbins <arnold@skeeve.com> * dfa.c (lex): Sync with GNU grep. Handle multibyte \s and \S. @@ -80,6 +90,13 @@ * dfa.c: Sync with GNU grep. +2013-09-25 Arnold D. Robbins <arnold@skeeve.com> + + * builtin.c (do_rand): Make the result more random by calling + random() twice. See the comment in the code. Thanks to + Bob Jewett <jewett@bill.scs.agilent.com> for the report and + the fix. + 2013-09-24 Arnold D. Robbins <arnold@skeeve.com> * debug.c (find_rule): Handle case where lineno is zero. Can happen @@ -161,6 +178,12 @@ * regcomp.c, regex.h, regex_internal.h: Sync with GLIBC. +2013-08-22 Arnold D. Robbins <arnold@skeeve.com> + + * str_array.c (env_store): If the new value being stored is NULL, + pass in "" instead. Avoids core dump on Mac OS X. + Thanks to Hermann Peifer for the bug report. + 2013-08-20 Arnold D. Robbins <arnold@skeeve.com> * nonposix.h: New file. Contains FAKE_FD_VALUE. @@ -169,6 +192,16 @@ 2013-08-18 Arnold D. Robbins <arnold@skeeve.com> + Reflect updates to ENVIRON into the real environment. + + * awk.h (init_env_array): Add declaration. + * main.c (load_environ): Call init_env_array. + * str_array.c (env_remove, env_store, env_clear, init_env_array): + New functions. + (env_array_func): New array vtable. + +2013-08-18 Arnold D. Robbins <arnold@skeeve.com> + * array.c (force_array): Set symbol->xarray to NULL before initing the array if it was Node_var_new. (null_array): Restore assert, undoing change of 2013-05-27. diff --git a/Makefile.in b/Makefile.in index b60fe7e1..9a1a9053 100644 --- a/Makefile.in +++ b/Makefile.in @@ -79,7 +79,7 @@ DIST_COMMON = INSTALL NEWS README AUTHORS ChangeLog \ $(srcdir)/Makefile.in $(srcdir)/Makefile.am \ $(top_srcdir)/configure $(am__configure_deps) \ $(srcdir)/configh.in mkinstalldirs ABOUT-NLS awkgram.c \ - command.c depcomp ylwrap $(include_HEADERS) COPYING \ + command.c depcomp ylwrap $(include_HEADERS) COPYING TODO \ config.guess config.rpath config.sub install-sh missing ACLOCAL_M4 = $(top_srcdir)/aclocal.m4 am__aclocal_m4_deps = $(top_srcdir)/m4/arch.m4 \ @@ -4,6 +4,18 @@ are permitted in any medium without royalty provided the copyright notice and this notice are preserved. +Changes from 4.1.1 to 4.2.0 +--------------------------- + +1. If not in POSIX mode, changes to ENVIRON are reflected into + gawk's environment, affecting any programs run by system() + or for piped redirections. + +2. The series of numbers returned by rand() should now be "more + random" than previously. Gawk's rand() remains repeatable; you will + get the same series of numbers each time you call rand() repeatedly, + but this will be a different series than previously. + Changes from 4.1.0 to 4.1.1 --------------------------- @@ -0,0 +1,204 @@ +Thu Oct 24 22:11:44 IDT 2013 +============================ + +There were too many files tracking different thoughts and ideas for +things to do, or consider doing. This file merges them into one. As +tasks are completed, they should be moved to the DONE section, below, +or simply removed. + +Upon creation of a release (major or patch release), items from the +previous release should be removed. + +This file should exist only in the master branch or branches based off +of it for development, but not in the stable branch. This may require some +careful work with Git. + +TODO +==== + +Minor Cleanups and Code Improvements +------------------------------------ + + Review the bash source script for working with shared libraries in + order to nuke the use of libtool. [ Partially started in the + nolibtool branch. ] + + Enhance profiling to save comments in a byte-code that does nothing + but that can be used when pretty printing the program. + + API: + ??? #if !defined(GAWK) && !defined(GAWK_OMIT_CONVENIENCE_MACROS) + + ?? Add debugger commands to reference card + + Look at function order within files. + + regex.h - remove underscores in param names + + Consider removing use of and/or need for the protos.h file. + + Recheck if gnulib regex can be dropped in + +Minor New Features +------------------ + + Add a div() function to do integer division result. Needed + esp for MPFR with large ints. + + Enhance extension/fork.c waitpid to allow the caller to specify + the options. And add an optional array argument to wait and + waitpid in which to return exit status information. + + Consider relaxing the strictness of --posix. + + Make it possible to put print/printf + redirections into + an expression. + + Have pretty printing not run the program and nuke the + undocumented GAWK_NO_PP_RUN env var. Requires test suite + adjustments. + + ? Add an optional base to strtonum, allowing 2-36. + + ? Optional third argument for index indicating where to start the + search. + +Major New Features +------------------ + + Think about how to generalize indirect access. Manuel Collado + suggests things like + + foo = 5 + @"foo" += 4 + + Also needed: + + Indirect calls of built-ins + Indirect calls of extension functions + Indirect through array elements, not just scalar variables + + Some way to make regexp constants first class citizens: + - Assign to variables + - Pass to functions + Tawk has this and it would also make indirect calling of builtins + work more reasonably. Probably would use a special syntax like + @/.../ for such objects. + + Consider a typeof() function that returns a string (scalar, array, + regexp). + + Fix the early chapters in the doc with more up-to-date examples. + No-one uses Bulletin Board Systems anymore. + + Add ability to do decimal arithmetic. + + Rework management of array index storage. (Partially DONE.) + + Consider using an atom table for all string array indices. + + DBM storage of awk arrays. Try to allow multiple dbm packages. + + ?? A RECLEN variable for fixed-length record input. PROCINFO["RS"] + would be "RS" or "RECLEN" depending upon what's in use. + *** Could this be done as an extension? + + ?? Use a new or improved dfa and/or regex library. + + Rewrite in C++. + +Things To Think About That May Never Happen +------------------------------------------- + + Consider making shadowed variables a warning and not + a fatal warning when --lint=fatal. + + Similar for extra parameters in a function call. + + Look at code coverage tools, like S2E: https://s2e.epfl.ch/ + + Try running with diehard. See http://www.diehard-software.org, + https://github.com/emeryberger/DieHard + + Implement namespaces. Arnold suggested the following in an email: + - Extend the definition of an 'identifier' to include "." as a valid character + although an identifier can't start with it. + - Extension libraries install functions and global variables with names + that have a "." in them: XML.parse(), XML.name, whatever. + - Awk code can read/write such variables and call such functions, but they + cannot define such functions + function XML.foo() { .. } # error + or create a variable with such a name if it doesn't exist. This would + be a run-time error, not a parse-time error. + - This last rule may be too restrictive. + I don't want to get into fancy rules a la perl and file-scope visibility + etc, I'd like to keep things simple. But how we design this is going + to be very important. + + Include a sample rpm spec file in a new packaging subdirectory. + + Patch lexer for @include and @load to make quotes optional. + + ? Have strftime() pay attention to the value of ENVIRON["TZ"] + + Add a lint check if the return value of a function is used but + the function did not supply a value. + + Consider making gawk output +nan for NaN values so that it + will accept its own output as input. + NOTE: Investigated this. GLIBC formats NaN as '-nan' + and -NaN as 'nan'. Dealing with this is not simple. + + Enhance FIELDWIDTHS with some way to indicate "the rest of the record". + E.g., a length of 0 or -1 or something. Maybe "n"? + + +DONE +==== + +Minor Cleanups and Code Improvements +------------------------------------ + +Minor New Features +------------------ + +Major New Features +------------------ + +Things That We Decided We Will Never Do +======================================= + + Consider moving var_value info into Node_var itself to reduce + memory usage. This would break all uses of get_lhs in the + code. It's too sweeping a change. + + Add macros for working with flags instead of using & and | + directly. + + FIX regular field splitting to use FPAT algorithm. + Note: Looked at this. Not sure it's with the trouble: + If it ain't broke... + + Scope IDs for IPv6 addresses + + Gnulib + + Make FIELDWIDTHS be an array? + + "Do an optimization pass over parse tree?" + This isn't relevant now that we are using a byte code engine. + + "Consider integrating Fred Fish's DBUG library into gawk." + I did this once as an experiment. But I don't see a lot of value + to this at this stage of the development. Stepping through things + in a debugger is generally enough. Also, I would have to try to + track down the latest version of this. + + "Make awk '/foo/' files... run at egrep speeds (how?)" + This has been on the list since the early days (gawk 1.x or early + 2.x). But I am not sure how to really do this, nor have I done + timings, nor does there seem to be any real demand for this. + + Change from dlopen to using the libltdl library (i.e. lt_dlopen). + This may support more platforms. If we move off of libtool + then this is the wrong direction. @@ -1364,6 +1364,7 @@ extern NODE *do_aoption(int nargs); extern NODE *do_asort(int nargs); extern NODE *do_asorti(int nargs); extern unsigned long (*hash)(const char *s, size_t len, unsigned long hsize, size_t *code); +extern void init_env_array(NODE *env_node); /* awkgram.c */ extern NODE *variable(int location, char *name, NODETYPE type); extern int parse_program(INSTRUCTION **pcode); @@ -2377,6 +2377,8 @@ static char *const state = (char *const) istate; NODE * do_rand(int nargs ATTRIBUTE_UNUSED) { + double tmprand; +#define RAND_DIVISOR ((double)GAWK_RANDOM_MAX+1.0) if (firstrand) { (void) initstate((unsigned) 1, state, SIZEOF_STATE); /* don't need to srandom(1), initstate() does it for us. */ @@ -2388,7 +2390,60 @@ do_rand(int nargs ATTRIBUTE_UNUSED) * * 0 <= n < 1 */ - return make_number((AWKNUM) (random() % GAWK_RANDOM_MAX) / GAWK_RANDOM_MAX); + /* + * Date: Wed, 28 Aug 2013 17:52:46 -0700 + * From: Bob Jewett <jewett@bill.scs.agilent.com> + * + * Call random() twice to fill in more bits in the value + * of the double. Also, there is a bug in random() such + * that when the values of successive values are combined + * like (rand1*rand2)^2, (rand3*rand4)^2, ... the + * resulting time series is not white noise. The + * following also seems to fix that bug. + * + * The add/subtract 0.5 keeps small bits from filling + * below 2^-53 in the double, not that anyone should be + * looking down there. + * + * Date: Wed, 25 Sep 2013 10:45:38 -0600 (MDT) + * From: "Nelson H. F. Beebe" <beebe@math.utah.edu> + * (4) The code is typical of many published fragments for converting + * from integer to floating-point, and I discuss the serious pitfalls + * in my book, because it leads to platform-dependent behavior at the + * end points of the interval [0,1] + * + * (5) the documentation in the gawk info node says + * + * `rand()' + * Return a random number. The values of `rand()' are uniformly + * distributed between zero and one. The value could be zero but is + * never one.(1) + * + * The division by RAND_DIVISOR may not guarantee that 1.0 is never + * returned: the programmer forgot the platform-dependent issue of + * rounding. + * + * For points 4 and 5, the safe way is a loop: + * + * double + * rand(void) // return value in [0.0, 1.0) + * { + * value = internal_rand(); + * + * while (value == 1.0) + * value = internal_rand(); + * + * return (value); + * } + */ + + do { + tmprand = 0.5 + ( (random()/RAND_DIVISOR + random()) + / RAND_DIVISOR); + tmprand -= 0.5; + } while (tmprand == 1.0); + + return make_number((AWKNUM) tmprand); } /* do_srand --- seed the random number generator */ @@ -1,6 +1,6 @@ #! /bin/sh # Guess values for system-dependent variables and create Makefiles. -# Generated by GNU Autoconf 2.69 for GNU Awk 4.1.0a. +# Generated by GNU Autoconf 2.69 for GNU Awk 4.1.60. # # Report bugs to <bug-gawk@gnu.org>. # @@ -580,8 +580,8 @@ MAKEFLAGS= # Identity of this package. PACKAGE_NAME='GNU Awk' PACKAGE_TARNAME='gawk' -PACKAGE_VERSION='4.1.0a' -PACKAGE_STRING='GNU Awk 4.1.0a' +PACKAGE_VERSION='4.1.60' +PACKAGE_STRING='GNU Awk 4.1.60' PACKAGE_BUGREPORT='bug-gawk@gnu.org' PACKAGE_URL='http://www.gnu.org/software/gawk/' @@ -1323,7 +1323,7 @@ if test "$ac_init_help" = "long"; then # Omit some internal or obsolete options to make the list less imposing. # This message is too long to be a string in the A/UX 3.1 sh. cat <<_ACEOF -\`configure' configures GNU Awk 4.1.0a to adapt to many kinds of systems. +\`configure' configures GNU Awk 4.1.60 to adapt to many kinds of systems. Usage: $0 [OPTION]... [VAR=VALUE]... @@ -1393,7 +1393,7 @@ fi if test -n "$ac_init_help"; then case $ac_init_help in - short | recursive ) echo "Configuration of GNU Awk 4.1.0a:";; + short | recursive ) echo "Configuration of GNU Awk 4.1.60:";; esac cat <<\_ACEOF @@ -1510,7 +1510,7 @@ fi test -n "$ac_init_help" && exit $ac_status if $ac_init_version; then cat <<\_ACEOF -GNU Awk configure 4.1.0a +GNU Awk configure 4.1.60 generated by GNU Autoconf 2.69 Copyright (C) 2012 Free Software Foundation, Inc. @@ -2219,7 +2219,7 @@ cat >config.log <<_ACEOF This file contains any messages produced by compilers while running configure, to aid debugging if configure makes a mistake. -It was created by GNU Awk $as_me 4.1.0a, which was +It was created by GNU Awk $as_me 4.1.60, which was generated by GNU Autoconf 2.69. Invocation command line was $ $0 $@ @@ -3102,7 +3102,7 @@ fi # Define the identity of the package. PACKAGE='gawk' - VERSION='4.1.0a' + VERSION='4.1.60' cat >>confdefs.h <<_ACEOF @@ -11526,7 +11526,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1 # report actual input values of CONFIG_FILES etc. instead of their # values after options handling. ac_log=" -This file was extended by GNU Awk $as_me 4.1.0a, which was +This file was extended by GNU Awk $as_me 4.1.60, which was generated by GNU Autoconf 2.69. Invocation command line was CONFIG_FILES = $CONFIG_FILES @@ -11594,7 +11594,7 @@ _ACEOF cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`" ac_cs_version="\\ -GNU Awk config.status 4.1.0a +GNU Awk config.status 4.1.60 configured by $0, generated by GNU Autoconf 2.69, with options \\"\$ac_cs_config\\" diff --git a/configure.ac b/configure.ac index 28d4f7d8..3c6a7580 100644 --- a/configure.ac +++ b/configure.ac @@ -23,7 +23,7 @@ dnl dnl Process this file with autoconf to produce a configure script. -AC_INIT([GNU Awk], 4.1.0a, bug-gawk@gnu.org, gawk) +AC_INIT([GNU Awk], 4.1.60, bug-gawk@gnu.org, gawk) # This is a hack. Different versions of install on different systems # are just too different. Chuck it and use install-sh. diff --git a/doc/ChangeLog b/doc/ChangeLog index 854cad6d..da5ad1ad 100644 --- a/doc/ChangeLog +++ b/doc/ChangeLog @@ -48,6 +48,11 @@ * gawktexi.in (FN, FFN, DF,DDF, PVERSION, CTL): Remove macros. They have no alternate versions and are just in the way. +2013-08-15 Arnold D. Robbins <arnold@skeeve.com> + + * gawk.1: Document that ENVIRON updates affect the environment. + * gawktexi.in: Ditto. + 2013-06-27 Arnold D. Robbins <arnold@skeeve.com> * texinfo.tex: Update from Karl, fixes a formating problem. @@ -13,7 +13,7 @@ . if \w'\(rq' .ds rq "\(rq . \} .\} -.TH GAWK 1 "May 09 2013" "Free Software Foundation" "Utility Commands" +.TH GAWK 1 "Aug 15 2013" "Free Software Foundation" "Utility Commands" .SH NAME gawk \- pattern scanning and processing language .SH SYNOPSIS @@ -917,11 +917,17 @@ An array containing the values of the current environment. The array is indexed by the environment variables, each element being the value of that variable (e.g., \fBENVIRON["HOME"]\fP might be \fB"/home/arnold"\fR). -Changing this array does not affect the environment seen by programs which +.sp +In POSIX mode, +changing this array does not affect the environment seen by programs which .I gawk spawns via redirection or the .B system() function. +Otherwise, +.I gawk +updates its real environment so that programs it spawns see +the changes. .TP .B ERRNO If a system error occurs either doing a redirection for diff --git a/doc/gawk.info b/doc/gawk.info index 24f08018..4e31aa3b 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -9688,9 +9688,18 @@ with a pound sign (`#'). An associative array containing the values of the environment. The array indices are the environment variable names; the elements are the values of the particular environment variables. For - example, `ENVIRON["HOME"]' might be `/home/arnold'. Changing this - array does not affect the environment passed on to any programs - that `awk' may spawn via redirection or the `system()' function. + example, `ENVIRON["HOME"]' might be `/home/arnold'. + + For POSIX `awk', changing this array does not affect the + environment passed on to any programs that `awk' may spawn via + redirection or the `system()' function. + + However, beginning with version 4.2, if not in POSIX compatibility + mode, `gawk' does update its own environment when `ENVIRON' is + changed, thus changing the environment seen by programs that it + creates. You should therefore be especially careful if you modify + `ENVIRON["PATH"]"', which is the search path for finding + executable programs. Some operating systems may not have environment variables. On such systems, the `ENVIRON' array is empty (except for @@ -30155,9 +30164,9 @@ Index * dark corner, exit statement: Exit Statement. (line 30) * dark corner, field separators: Field Splitting Summary. (line 46) -* dark corner, FILENAME variable <1>: Auto-set. (line 93) +* dark corner, FILENAME variable <1>: Auto-set. (line 102) * dark corner, FILENAME variable: Getline Notes. (line 19) -* dark corner, FNR/NR variables: Auto-set. (line 314) +* dark corner, FNR/NR variables: Auto-set. (line 323) * dark corner, format-control characters: Control Letters. (line 18) * dark corner, FS as null string: Single Character Fields. (line 20) @@ -30326,12 +30335,12 @@ Index (line 23) * differences in awk and gawk, close() function: Close Files And Pipes. (line 81) -* differences in awk and gawk, ERRNO variable: Auto-set. (line 73) +* differences in awk and gawk, ERRNO variable: Auto-set. (line 82) * differences in awk and gawk, error messages: Special FD. (line 16) * differences in awk and gawk, FIELDWIDTHS variable: User-modified. (line 35) * differences in awk and gawk, FPAT variable: User-modified. (line 45) -* differences in awk and gawk, FUNCTAB variable: Auto-set. (line 119) +* differences in awk and gawk, FUNCTAB variable: Auto-set. (line 128) * differences in awk and gawk, function arguments (gawk): Calling Built-in. (line 16) * differences in awk and gawk, getline command: Getline. (line 19) @@ -30354,14 +30363,14 @@ Index (line 261) * differences in awk and gawk, print/printf statements: Format Modifiers. (line 13) -* differences in awk and gawk, PROCINFO array: Auto-set. (line 133) +* differences in awk and gawk, PROCINFO array: Auto-set. (line 142) * differences in awk and gawk, record separators: Records. (line 117) * differences in awk and gawk, regexp constants: Using Constant Regexps. (line 43) * differences in awk and gawk, regular expressions: Case-sensitivity. (line 26) * differences in awk and gawk, RS/RT variables: Records. (line 172) -* differences in awk and gawk, RT variable: Auto-set. (line 266) +* differences in awk and gawk, RT variable: Auto-set. (line 275) * differences in awk and gawk, single-character fields: Single Character Fields. (line 6) * differences in awk and gawk, split() function: String Functions. @@ -30370,7 +30379,7 @@ Index * differences in awk and gawk, strings, storing: Records. (line 191) * differences in awk and gawk, strtonum() function (gawk): String Functions. (line 406) -* differences in awk and gawk, SYMTAB variable: Auto-set. (line 274) +* differences in awk and gawk, SYMTAB variable: Auto-set. (line 283) * differences in awk and gawk, TEXTDOMAIN variable: User-modified. (line 162) * differences in awk and gawk, trunc-mod operation: Arithmetic Ops. @@ -30451,13 +30460,13 @@ Index (line 11) * EREs (Extended Regular Expressions): Bracket Expressions. (line 24) * ERRNO variable <1>: TCP/IP Networking. (line 54) -* ERRNO variable <2>: Auto-set. (line 73) +* ERRNO variable <2>: Auto-set. (line 82) * ERRNO variable <3>: BEGINFILE/ENDFILE. (line 26) * ERRNO variable <4>: Close Files And Pipes. (line 138) * ERRNO variable: Getline. (line 19) * error handling: Special FD. (line 16) -* error handling, ERRNO variable and: Auto-set. (line 73) +* error handling, ERRNO variable and: Auto-set. (line 82) * error output: Special FD. (line 6) * escape processing, gsub()/gensub()/sub() functions: Gory Details. (line 6) @@ -30569,7 +30578,7 @@ Index * file names, distinguishing: Auto-set. (line 52) * file names, in compatibility mode: Special Caveats. (line 9) * file names, standard streams in gawk: Special FD. (line 46) -* FILENAME variable <1>: Auto-set. (line 93) +* FILENAME variable <1>: Auto-set. (line 102) * FILENAME variable: Reading Files. (line 6) * FILENAME variable, getline, setting with: Getline Notes. (line 19) * filenames, assignments as: Ignoring Assigns. (line 6) @@ -30636,9 +30645,9 @@ Index * floating-point, numbers: General Arithmetic. (line 6) * fnmatch extension function: Extension Sample Fnmatch. (line 6) -* FNR variable <1>: Auto-set. (line 103) +* FNR variable <1>: Auto-set. (line 112) * FNR variable: Records. (line 6) -* FNR variable, changing: Auto-set. (line 314) +* FNR variable, changing: Auto-set. (line 323) * for statement: For Statement. (line 6) * for statement, looping over arrays: Scanning an Array. (line 20) * fork extension function: Extension Sample Fork. @@ -30685,7 +30694,7 @@ Index * FSF (Free Software Foundation): Manual History. (line 6) * fts extension function: Extension Sample File Functions. (line 77) -* FUNCTAB array: Auto-set. (line 119) +* FUNCTAB array: Auto-set. (line 128) * function calls: Function Calls. (line 6) * function calls, indirect: Indirect Calls. (line 6) * function pointers: Indirect Calls. (line 6) @@ -30754,7 +30763,7 @@ Index * gawk, distribution: Distribution contents. (line 6) * gawk, ERRNO variable in <1>: TCP/IP Networking. (line 54) -* gawk, ERRNO variable in <2>: Auto-set. (line 73) +* gawk, ERRNO variable in <2>: Auto-set. (line 82) * gawk, ERRNO variable in <3>: BEGINFILE/ENDFILE. (line 26) * gawk, ERRNO variable in <4>: Close Files And Pipes. (line 138) @@ -30771,7 +30780,7 @@ Index * gawk, FPAT variable in <1>: User-modified. (line 45) * gawk, FPAT variable in: Splitting By Content. (line 26) -* gawk, FUNCTAB array in: Auto-set. (line 119) +* gawk, FUNCTAB array in: Auto-set. (line 128) * gawk, function arguments and: Calling Built-in. (line 16) * gawk, hexadecimal numbers and: Nondecimal-numbers. (line 42) * gawk, IGNORECASE variable in <1>: Array Sorting Functions. @@ -30802,7 +30811,7 @@ Index * gawk, OS/2 version of: PC Using. (line 11) * gawk, PROCINFO array in <1>: Two-way I/O. (line 116) * gawk, PROCINFO array in <2>: Time Functions. (line 47) -* gawk, PROCINFO array in: Auto-set. (line 133) +* gawk, PROCINFO array in: Auto-set. (line 142) * gawk, regexp constants and: Using Constant Regexps. (line 28) * gawk, regular expressions, case sensitivity: Case-sensitivity. @@ -30810,7 +30819,7 @@ Index * gawk, regular expressions, operators: GNU Regexp Operators. (line 6) * gawk, regular expressions, precedence: Regexp Operators. (line 161) -* gawk, RT variable in <1>: Auto-set. (line 266) +* gawk, RT variable in <1>: Auto-set. (line 275) * gawk, RT variable in <2>: Getline/Variable/File. (line 10) * gawk, RT variable in <3>: Multiple Line. (line 129) @@ -30819,7 +30828,7 @@ Index * gawk, source code, obtaining: Getting. (line 6) * gawk, splitting fields and: Constant Size. (line 87) * gawk, string-translation functions: I18N Functions. (line 6) -* gawk, SYMTAB array in: Auto-set. (line 274) +* gawk, SYMTAB array in: Auto-set. (line 283) * gawk, TEXTDOMAIN variable in: User-modified. (line 162) * gawk, timestamps: Time Functions. (line 6) * gawk, uses for: Preface. (line 36) @@ -31222,16 +31231,16 @@ Index (line 47) * nexti debugger command: Debugger Execution Control. (line 49) -* NF variable <1>: Auto-set. (line 108) +* NF variable <1>: Auto-set. (line 117) * NF variable: Fields. (line 33) * NF variable, decrementing: Changing Fields. (line 107) * ni debugger command (alias for nexti): Debugger Execution Control. (line 49) * noassign.awk program: Ignoring Assigns. (line 15) * not Boolean-logic operator: Boolean Ops. (line 6) -* NR variable <1>: Auto-set. (line 128) +* NR variable <1>: Auto-set. (line 137) * NR variable: Records. (line 6) -* NR variable, changing: Auto-set. (line 314) +* NR variable, changing: Auto-set. (line 323) * null strings <1>: Basic Data Typing. (line 26) * null strings <2>: Truth Values. (line 6) * null strings <3>: Regexp Field Splitting. @@ -31511,7 +31520,7 @@ Index * PROCINFO array <3>: Group Functions. (line 6) * PROCINFO array <4>: Passwd Functions. (line 6) * PROCINFO array <5>: Time Functions. (line 47) -* PROCINFO array <6>: Auto-set. (line 133) +* PROCINFO array <6>: Auto-set. (line 142) * PROCINFO array: Obsolete. (line 11) * profiling awk programs: Profiling. (line 6) * profiling awk programs, dynamically: Profiling. (line 172) @@ -31665,7 +31674,7 @@ Index * right angle bracket (>), >> operator (I/O): Redirection. (line 50) * right shift, bitwise: Bitwise Functions. (line 32) * Ritchie, Dennis: Basic Data Typing. (line 55) -* RLENGTH variable: Auto-set. (line 253) +* RLENGTH variable: Auto-set. (line 262) * RLENGTH variable, match() function and: String Functions. (line 225) * Robbins, Arnold <1>: Future Extensions. (line 6) * Robbins, Arnold <2>: Bugs. (line 32) @@ -31692,9 +31701,9 @@ Index * RS variable: Records. (line 20) * RS variable, multiline records and: Multiple Line. (line 17) * rshift() function (gawk): Bitwise Functions. (line 52) -* RSTART variable: Auto-set. (line 259) +* RSTART variable: Auto-set. (line 268) * RSTART variable, match() function and: String Functions. (line 225) -* RT variable <1>: Auto-set. (line 266) +* RT variable <1>: Auto-set. (line 275) * RT variable <2>: Getline/Variable/File. (line 10) * RT variable <3>: Multiple Line. (line 129) @@ -31777,7 +31786,7 @@ Index (line 110) * sidebar, Changing FS Does Not Affect the Fields: Field Splitting Summary. (line 38) -* sidebar, Changing NR and FNR: Auto-set. (line 312) +* sidebar, Changing NR and FNR: Auto-set. (line 321) * sidebar, Controlling Output Buffering with system(): I/O Functions. (line 135) * sidebar, Escape Sequences for Metacharacters: Escape Sequences. @@ -31919,7 +31928,7 @@ Index * substr() function: String Functions. (line 483) * Sumner, Andrew: Other Versions. (line 64) * switch statement: Switch Statement. (line 6) -* SYMTAB array: Auto-set. (line 274) +* SYMTAB array: Auto-set. (line 283) * syntactic ambiguity: /= operator vs. /=.../ regexp constant: Assignment Ops. (line 147) * system() function: I/O Functions. (line 72) @@ -32360,336 +32369,336 @@ Node: Built-in Variables403555 Node: User-modified404650 Ref: User-modified-Footnote-1413008 Node: Auto-set413070 -Ref: Auto-set-Footnote-1426148 -Ref: Auto-set-Footnote-2426353 -Node: ARGC and ARGV426409 -Node: Arrays430260 -Node: Array Basics431765 -Node: Array Intro432591 -Node: Reference to Elements436908 -Node: Assigning Elements439178 -Node: Array Example439669 -Node: Scanning an Array441401 -Node: Controlling Scanning443715 -Ref: Controlling Scanning-Footnote-1448638 -Node: Delete448954 -Ref: Delete-Footnote-1451719 -Node: Numeric Array Subscripts451776 -Node: Uninitialized Subscripts453959 -Node: Multidimensional455586 -Node: Multiscanning458678 -Node: Arrays of Arrays460267 -Node: Functions464907 -Node: Built-in465726 -Node: Calling Built-in466804 -Node: Numeric Functions468792 -Ref: Numeric Functions-Footnote-1472624 -Ref: Numeric Functions-Footnote-2472981 -Ref: Numeric Functions-Footnote-3473029 -Node: String Functions473298 -Ref: String Functions-Footnote-1496856 -Ref: String Functions-Footnote-2496985 -Ref: String Functions-Footnote-3497233 -Node: Gory Details497320 -Ref: table-sub-escapes498999 -Ref: table-sub-posix-92500353 -Ref: table-sub-proposed501704 -Ref: table-posix-sub503058 -Ref: table-gensub-escapes504603 -Ref: Gory Details-Footnote-1505779 -Ref: Gory Details-Footnote-2505830 -Node: I/O Functions505981 -Ref: I/O Functions-Footnote-1512966 -Node: Time Functions513113 -Ref: Time Functions-Footnote-1524046 -Ref: Time Functions-Footnote-2524114 -Ref: Time Functions-Footnote-3524272 -Ref: Time Functions-Footnote-4524383 -Ref: Time Functions-Footnote-5524495 -Ref: Time Functions-Footnote-6524722 -Node: Bitwise Functions524988 -Ref: table-bitwise-ops525550 -Ref: Bitwise Functions-Footnote-1529771 -Node: Type Functions529955 -Node: I18N Functions531106 -Node: User-defined532733 -Node: Definition Syntax533537 -Ref: Definition Syntax-Footnote-1538447 -Node: Function Example538516 -Node: Function Caveats541110 -Node: Calling A Function541531 -Node: Variable Scope542646 -Node: Pass By Value/Reference545609 -Node: Return Statement549117 -Node: Dynamic Typing552098 -Node: Indirect Calls553029 -Node: Library Functions562714 -Ref: Library Functions-Footnote-1566227 -Ref: Library Functions-Footnote-2566370 -Node: Library Names566541 -Ref: Library Names-Footnote-1570012 -Ref: Library Names-Footnote-2570232 -Node: General Functions570318 -Node: Strtonum Function571346 -Node: Assert Function574276 -Node: Round Function577602 -Node: Cliff Random Function579145 -Node: Ordinal Functions580161 -Ref: Ordinal Functions-Footnote-1583231 -Ref: Ordinal Functions-Footnote-2583483 -Node: Join Function583692 -Ref: Join Function-Footnote-1585463 -Node: Getlocaltime Function585663 -Node: Readfile Function589404 -Node: Data File Management591243 -Node: Filetrans Function591875 -Node: Rewind Function595944 -Node: File Checking597331 -Node: Empty Files598425 -Node: Ignoring Assigns600655 -Node: Getopt Function602208 -Ref: Getopt Function-Footnote-1613511 -Node: Passwd Functions613714 -Ref: Passwd Functions-Footnote-1622689 -Node: Group Functions622777 -Node: Walking Arrays630861 -Node: Sample Programs632998 -Node: Running Examples633672 -Node: Clones634400 -Node: Cut Program635624 -Node: Egrep Program645469 -Ref: Egrep Program-Footnote-1653242 -Node: Id Program653352 -Node: Split Program656968 -Ref: Split Program-Footnote-1660487 -Node: Tee Program660615 -Node: Uniq Program663418 -Node: Wc Program670847 -Ref: Wc Program-Footnote-1675113 -Ref: Wc Program-Footnote-2675313 -Node: Miscellaneous Programs675405 -Node: Dupword Program676593 -Node: Alarm Program678624 -Node: Translate Program683377 -Ref: Translate Program-Footnote-1687764 -Ref: Translate Program-Footnote-2688012 -Node: Labels Program688146 -Ref: Labels Program-Footnote-1691517 -Node: Word Sorting691601 -Node: History Sorting695485 -Node: Extract Program697324 -Ref: Extract Program-Footnote-1704827 -Node: Simple Sed704955 -Node: Igawk Program708017 -Ref: Igawk Program-Footnote-1723174 -Ref: Igawk Program-Footnote-2723375 -Node: Anagram Program723513 -Node: Signature Program726581 -Node: Advanced Features727681 -Node: Nondecimal Data729567 -Node: Array Sorting731150 -Node: Controlling Array Traversal731847 -Node: Array Sorting Functions740085 -Ref: Array Sorting Functions-Footnote-1743759 -Ref: Array Sorting Functions-Footnote-2743852 -Node: Two-way I/O744046 -Ref: Two-way I/O-Footnote-1749478 -Node: TCP/IP Networking749548 -Node: Profiling752392 -Node: Internationalization759889 -Node: I18N and L10N761314 -Node: Explaining gettext762000 -Ref: Explaining gettext-Footnote-1767068 -Ref: Explaining gettext-Footnote-2767252 -Node: Programmer i18n767417 -Node: Translator i18n771619 -Node: String Extraction772412 -Ref: String Extraction-Footnote-1773373 -Node: Printf Ordering773459 -Ref: Printf Ordering-Footnote-1776243 -Node: I18N Portability776307 -Ref: I18N Portability-Footnote-1778756 -Node: I18N Example778819 -Ref: I18N Example-Footnote-1781457 -Node: Gawk I18N781529 -Node: Debugger782150 -Node: Debugging783121 -Node: Debugging Concepts783554 -Node: Debugging Terms785410 -Node: Awk Debugging788007 -Node: Sample Debugging Session788899 -Node: Debugger Invocation789419 -Node: Finding The Bug790751 -Node: List of Debugger Commands797239 -Node: Breakpoint Control798573 -Node: Debugger Execution Control802237 -Node: Viewing And Changing Data805597 -Node: Execution Stack808953 -Node: Debugger Info810420 -Node: Miscellaneous Debugger Commands814402 -Node: Readline Support819578 -Node: Limitations820409 -Node: Arbitrary Precision Arithmetic822661 -Ref: Arbitrary Precision Arithmetic-Footnote-1824310 -Node: General Arithmetic824458 -Node: Floating Point Issues826178 -Node: String Conversion Precision827059 -Ref: String Conversion Precision-Footnote-1828764 -Node: Unexpected Results828873 -Node: POSIX Floating Point Problems831026 -Ref: POSIX Floating Point Problems-Footnote-1834851 -Node: Integer Programming834889 -Node: Floating-point Programming836628 -Ref: Floating-point Programming-Footnote-1842959 -Ref: Floating-point Programming-Footnote-2843229 -Node: Floating-point Representation843493 -Node: Floating-point Context844658 -Ref: table-ieee-formats845497 -Node: Rounding Mode846881 -Ref: table-rounding-modes847360 -Ref: Rounding Mode-Footnote-1850375 -Node: Gawk and MPFR850554 -Node: Arbitrary Precision Floats851809 -Ref: Arbitrary Precision Floats-Footnote-1854252 -Node: Setting Precision854568 -Ref: table-predefined-precision-strings855254 -Node: Setting Rounding Mode857399 -Ref: table-gawk-rounding-modes857803 -Node: Floating-point Constants858990 -Node: Changing Precision860419 -Ref: Changing Precision-Footnote-1861816 -Node: Exact Arithmetic861990 -Node: Arbitrary Precision Integers865128 -Ref: Arbitrary Precision Integers-Footnote-1868146 -Node: Dynamic Extensions868293 -Node: Extension Intro869751 -Node: Plugin License871016 -Node: Extension Mechanism Outline871701 -Ref: load-extension872118 -Ref: load-new-function873596 -Ref: call-new-function874591 -Node: Extension API Description876606 -Node: Extension API Functions Introduction877819 -Node: General Data Types882685 -Ref: General Data Types-Footnote-1888284 -Node: Requesting Values888583 -Ref: table-value-types-returned889314 -Node: Constructor Functions890268 -Node: Registration Functions893288 -Node: Extension Functions893973 -Node: Exit Callback Functions896198 -Node: Extension Version String897447 -Node: Input Parsers898097 -Node: Output Wrappers907854 -Node: Two-way processors912364 -Node: Printing Messages914572 -Ref: Printing Messages-Footnote-1915649 -Node: Updating `ERRNO'915801 -Node: Accessing Parameters916540 -Node: Symbol Table Access917770 -Node: Symbol table by name918282 -Node: Symbol table by cookie920029 -Ref: Symbol table by cookie-Footnote-1924159 -Node: Cached values924222 -Ref: Cached values-Footnote-1927671 -Node: Array Manipulation927762 -Ref: Array Manipulation-Footnote-1928860 -Node: Array Data Types928899 -Ref: Array Data Types-Footnote-1931602 -Node: Array Functions931694 -Node: Flattening Arrays935460 -Node: Creating Arrays942312 -Node: Extension API Variables947037 -Node: Extension Versioning947673 -Node: Extension API Informational Variables949574 -Node: Extension API Boilerplate950660 -Node: Finding Extensions954464 -Node: Extension Example955024 -Node: Internal File Description955754 -Node: Internal File Ops959845 -Ref: Internal File Ops-Footnote-1971353 -Node: Using Internal File Ops971493 -Ref: Using Internal File Ops-Footnote-1973846 -Node: Extension Samples974112 -Node: Extension Sample File Functions975636 -Node: Extension Sample Fnmatch984121 -Node: Extension Sample Fork985847 -Node: Extension Sample Inplace987065 -Node: Extension Sample Ord988843 -Node: Extension Sample Readdir989679 -Node: Extension Sample Revout991211 -Node: Extension Sample Rev2way991804 -Node: Extension Sample Read write array992494 -Node: Extension Sample Readfile994377 -Node: Extension Sample API Tests995195 -Node: Extension Sample Time995720 -Node: gawkextlib997084 -Node: Language History999844 -Node: V7/SVR3.11001366 -Node: SVR41003686 -Node: POSIX1005128 -Node: BTL1006514 -Node: POSIX/GNU1007248 -Node: Common Extensions1012783 -Node: Ranges and Locales1014089 -Ref: Ranges and Locales-Footnote-11018707 -Ref: Ranges and Locales-Footnote-21018734 -Ref: Ranges and Locales-Footnote-31018994 -Node: Contributors1019215 -Node: Installation1024290 -Node: Gawk Distribution1025184 -Node: Getting1025668 -Node: Extracting1026494 -Node: Distribution contents1028186 -Node: Unix Installation1033706 -Node: Quick Installation1034323 -Node: Additional Configuration Options1036767 -Node: Configuration Philosophy1038244 -Node: Non-Unix Installation1040598 -Node: PC Installation1041056 -Node: PC Binary Installation1042355 -Node: PC Compiling1044203 -Node: PC Testing1047147 -Node: PC Using1048323 -Node: Cygwin1052508 -Node: MSYS1053508 -Node: VMS Installation1054022 -Node: VMS Compilation1054625 -Ref: VMS Compilation-Footnote-11055632 -Node: VMS Installation Details1055690 -Node: VMS Running1057325 -Node: VMS Old Gawk1058932 -Node: Bugs1059406 -Node: Other Versions1063262 -Node: Notes1069346 -Node: Compatibility Mode1070146 -Node: Additions1070929 -Node: Accessing The Source1071856 -Node: Adding Code1073296 -Node: New Ports1079341 -Node: Derived Files1083476 -Ref: Derived Files-Footnote-11088797 -Ref: Derived Files-Footnote-21088831 -Ref: Derived Files-Footnote-31089431 -Node: Future Extensions1089529 -Node: Implementation Limitations1090106 -Node: Extension Design1091358 -Node: Old Extension Problems1092512 -Ref: Old Extension Problems-Footnote-11094020 -Node: Extension New Mechanism Goals1094077 -Ref: Extension New Mechanism Goals-Footnote-11097442 -Node: Extension Other Design Decisions1097628 -Node: Extension Future Growth1099734 -Node: Old Extension Mechanism1100570 -Node: Basic Concepts1102310 -Node: Basic High Level1102991 -Ref: figure-general-flow1103262 -Ref: figure-process-flow1103861 -Ref: Basic High Level-Footnote-11107090 -Node: Basic Data Typing1107275 -Node: Glossary1110630 -Node: Copying1136092 -Node: GNU Free Documentation License1173649 -Node: Index1198786 +Ref: Auto-set-Footnote-1426540 +Ref: Auto-set-Footnote-2426745 +Node: ARGC and ARGV426801 +Node: Arrays430652 +Node: Array Basics432157 +Node: Array Intro432983 +Node: Reference to Elements437300 +Node: Assigning Elements439570 +Node: Array Example440061 +Node: Scanning an Array441793 +Node: Controlling Scanning444107 +Ref: Controlling Scanning-Footnote-1449030 +Node: Delete449346 +Ref: Delete-Footnote-1452111 +Node: Numeric Array Subscripts452168 +Node: Uninitialized Subscripts454351 +Node: Multidimensional455978 +Node: Multiscanning459070 +Node: Arrays of Arrays460659 +Node: Functions465299 +Node: Built-in466118 +Node: Calling Built-in467196 +Node: Numeric Functions469184 +Ref: Numeric Functions-Footnote-1473016 +Ref: Numeric Functions-Footnote-2473373 +Ref: Numeric Functions-Footnote-3473421 +Node: String Functions473690 +Ref: String Functions-Footnote-1497248 +Ref: String Functions-Footnote-2497377 +Ref: String Functions-Footnote-3497625 +Node: Gory Details497712 +Ref: table-sub-escapes499391 +Ref: table-sub-posix-92500745 +Ref: table-sub-proposed502096 +Ref: table-posix-sub503450 +Ref: table-gensub-escapes504995 +Ref: Gory Details-Footnote-1506171 +Ref: Gory Details-Footnote-2506222 +Node: I/O Functions506373 +Ref: I/O Functions-Footnote-1513358 +Node: Time Functions513505 +Ref: Time Functions-Footnote-1524438 +Ref: Time Functions-Footnote-2524506 +Ref: Time Functions-Footnote-3524664 +Ref: Time Functions-Footnote-4524775 +Ref: Time Functions-Footnote-5524887 +Ref: Time Functions-Footnote-6525114 +Node: Bitwise Functions525380 +Ref: table-bitwise-ops525942 +Ref: Bitwise Functions-Footnote-1530163 +Node: Type Functions530347 +Node: I18N Functions531498 +Node: User-defined533125 +Node: Definition Syntax533929 +Ref: Definition Syntax-Footnote-1538839 +Node: Function Example538908 +Node: Function Caveats541502 +Node: Calling A Function541923 +Node: Variable Scope543038 +Node: Pass By Value/Reference546001 +Node: Return Statement549509 +Node: Dynamic Typing552490 +Node: Indirect Calls553421 +Node: Library Functions563106 +Ref: Library Functions-Footnote-1566619 +Ref: Library Functions-Footnote-2566762 +Node: Library Names566933 +Ref: Library Names-Footnote-1570404 +Ref: Library Names-Footnote-2570624 +Node: General Functions570710 +Node: Strtonum Function571738 +Node: Assert Function574668 +Node: Round Function577994 +Node: Cliff Random Function579537 +Node: Ordinal Functions580553 +Ref: Ordinal Functions-Footnote-1583623 +Ref: Ordinal Functions-Footnote-2583875 +Node: Join Function584084 +Ref: Join Function-Footnote-1585855 +Node: Getlocaltime Function586055 +Node: Readfile Function589796 +Node: Data File Management591635 +Node: Filetrans Function592267 +Node: Rewind Function596336 +Node: File Checking597723 +Node: Empty Files598817 +Node: Ignoring Assigns601047 +Node: Getopt Function602600 +Ref: Getopt Function-Footnote-1613903 +Node: Passwd Functions614106 +Ref: Passwd Functions-Footnote-1623081 +Node: Group Functions623169 +Node: Walking Arrays631253 +Node: Sample Programs633390 +Node: Running Examples634064 +Node: Clones634792 +Node: Cut Program636016 +Node: Egrep Program645861 +Ref: Egrep Program-Footnote-1653634 +Node: Id Program653744 +Node: Split Program657360 +Ref: Split Program-Footnote-1660879 +Node: Tee Program661007 +Node: Uniq Program663810 +Node: Wc Program671239 +Ref: Wc Program-Footnote-1675505 +Ref: Wc Program-Footnote-2675705 +Node: Miscellaneous Programs675797 +Node: Dupword Program676985 +Node: Alarm Program679016 +Node: Translate Program683769 +Ref: Translate Program-Footnote-1688156 +Ref: Translate Program-Footnote-2688404 +Node: Labels Program688538 +Ref: Labels Program-Footnote-1691909 +Node: Word Sorting691993 +Node: History Sorting695877 +Node: Extract Program697716 +Ref: Extract Program-Footnote-1705219 +Node: Simple Sed705347 +Node: Igawk Program708409 +Ref: Igawk Program-Footnote-1723566 +Ref: Igawk Program-Footnote-2723767 +Node: Anagram Program723905 +Node: Signature Program726973 +Node: Advanced Features728073 +Node: Nondecimal Data729959 +Node: Array Sorting731542 +Node: Controlling Array Traversal732239 +Node: Array Sorting Functions740477 +Ref: Array Sorting Functions-Footnote-1744151 +Ref: Array Sorting Functions-Footnote-2744244 +Node: Two-way I/O744438 +Ref: Two-way I/O-Footnote-1749870 +Node: TCP/IP Networking749940 +Node: Profiling752784 +Node: Internationalization760281 +Node: I18N and L10N761706 +Node: Explaining gettext762392 +Ref: Explaining gettext-Footnote-1767460 +Ref: Explaining gettext-Footnote-2767644 +Node: Programmer i18n767809 +Node: Translator i18n772011 +Node: String Extraction772804 +Ref: String Extraction-Footnote-1773765 +Node: Printf Ordering773851 +Ref: Printf Ordering-Footnote-1776635 +Node: I18N Portability776699 +Ref: I18N Portability-Footnote-1779148 +Node: I18N Example779211 +Ref: I18N Example-Footnote-1781849 +Node: Gawk I18N781921 +Node: Debugger782542 +Node: Debugging783513 +Node: Debugging Concepts783946 +Node: Debugging Terms785802 +Node: Awk Debugging788399 +Node: Sample Debugging Session789291 +Node: Debugger Invocation789811 +Node: Finding The Bug791143 +Node: List of Debugger Commands797631 +Node: Breakpoint Control798965 +Node: Debugger Execution Control802629 +Node: Viewing And Changing Data805989 +Node: Execution Stack809345 +Node: Debugger Info810812 +Node: Miscellaneous Debugger Commands814794 +Node: Readline Support819970 +Node: Limitations820801 +Node: Arbitrary Precision Arithmetic823053 +Ref: Arbitrary Precision Arithmetic-Footnote-1824702 +Node: General Arithmetic824850 +Node: Floating Point Issues826570 +Node: String Conversion Precision827451 +Ref: String Conversion Precision-Footnote-1829156 +Node: Unexpected Results829265 +Node: POSIX Floating Point Problems831418 +Ref: POSIX Floating Point Problems-Footnote-1835243 +Node: Integer Programming835281 +Node: Floating-point Programming837020 +Ref: Floating-point Programming-Footnote-1843351 +Ref: Floating-point Programming-Footnote-2843621 +Node: Floating-point Representation843885 +Node: Floating-point Context845050 +Ref: table-ieee-formats845889 +Node: Rounding Mode847273 +Ref: table-rounding-modes847752 +Ref: Rounding Mode-Footnote-1850767 +Node: Gawk and MPFR850946 +Node: Arbitrary Precision Floats852201 +Ref: Arbitrary Precision Floats-Footnote-1854644 +Node: Setting Precision854960 +Ref: table-predefined-precision-strings855646 +Node: Setting Rounding Mode857791 +Ref: table-gawk-rounding-modes858195 +Node: Floating-point Constants859382 +Node: Changing Precision860811 +Ref: Changing Precision-Footnote-1862208 +Node: Exact Arithmetic862382 +Node: Arbitrary Precision Integers865520 +Ref: Arbitrary Precision Integers-Footnote-1868538 +Node: Dynamic Extensions868685 +Node: Extension Intro870143 +Node: Plugin License871408 +Node: Extension Mechanism Outline872093 +Ref: load-extension872510 +Ref: load-new-function873988 +Ref: call-new-function874983 +Node: Extension API Description876998 +Node: Extension API Functions Introduction878211 +Node: General Data Types883077 +Ref: General Data Types-Footnote-1888676 +Node: Requesting Values888975 +Ref: table-value-types-returned889706 +Node: Constructor Functions890660 +Node: Registration Functions893680 +Node: Extension Functions894365 +Node: Exit Callback Functions896590 +Node: Extension Version String897839 +Node: Input Parsers898489 +Node: Output Wrappers908246 +Node: Two-way processors912756 +Node: Printing Messages914964 +Ref: Printing Messages-Footnote-1916041 +Node: Updating `ERRNO'916193 +Node: Accessing Parameters916932 +Node: Symbol Table Access918162 +Node: Symbol table by name918674 +Node: Symbol table by cookie920421 +Ref: Symbol table by cookie-Footnote-1924551 +Node: Cached values924614 +Ref: Cached values-Footnote-1928063 +Node: Array Manipulation928154 +Ref: Array Manipulation-Footnote-1929252 +Node: Array Data Types929291 +Ref: Array Data Types-Footnote-1931994 +Node: Array Functions932086 +Node: Flattening Arrays935852 +Node: Creating Arrays942704 +Node: Extension API Variables947429 +Node: Extension Versioning948065 +Node: Extension API Informational Variables949966 +Node: Extension API Boilerplate951052 +Node: Finding Extensions954856 +Node: Extension Example955416 +Node: Internal File Description956146 +Node: Internal File Ops960237 +Ref: Internal File Ops-Footnote-1971745 +Node: Using Internal File Ops971885 +Ref: Using Internal File Ops-Footnote-1974238 +Node: Extension Samples974504 +Node: Extension Sample File Functions976028 +Node: Extension Sample Fnmatch984513 +Node: Extension Sample Fork986239 +Node: Extension Sample Inplace987457 +Node: Extension Sample Ord989235 +Node: Extension Sample Readdir990071 +Node: Extension Sample Revout991603 +Node: Extension Sample Rev2way992196 +Node: Extension Sample Read write array992886 +Node: Extension Sample Readfile994769 +Node: Extension Sample API Tests995587 +Node: Extension Sample Time996112 +Node: gawkextlib997476 +Node: Language History1000236 +Node: V7/SVR3.11001758 +Node: SVR41004078 +Node: POSIX1005520 +Node: BTL1006906 +Node: POSIX/GNU1007640 +Node: Common Extensions1013175 +Node: Ranges and Locales1014481 +Ref: Ranges and Locales-Footnote-11019099 +Ref: Ranges and Locales-Footnote-21019126 +Ref: Ranges and Locales-Footnote-31019386 +Node: Contributors1019607 +Node: Installation1024682 +Node: Gawk Distribution1025576 +Node: Getting1026060 +Node: Extracting1026886 +Node: Distribution contents1028578 +Node: Unix Installation1034098 +Node: Quick Installation1034715 +Node: Additional Configuration Options1037159 +Node: Configuration Philosophy1038636 +Node: Non-Unix Installation1040990 +Node: PC Installation1041448 +Node: PC Binary Installation1042747 +Node: PC Compiling1044595 +Node: PC Testing1047539 +Node: PC Using1048715 +Node: Cygwin1052900 +Node: MSYS1053900 +Node: VMS Installation1054414 +Node: VMS Compilation1055017 +Ref: VMS Compilation-Footnote-11056024 +Node: VMS Installation Details1056082 +Node: VMS Running1057717 +Node: VMS Old Gawk1059324 +Node: Bugs1059798 +Node: Other Versions1063654 +Node: Notes1069738 +Node: Compatibility Mode1070538 +Node: Additions1071321 +Node: Accessing The Source1072248 +Node: Adding Code1073688 +Node: New Ports1079733 +Node: Derived Files1083868 +Ref: Derived Files-Footnote-11089189 +Ref: Derived Files-Footnote-21089223 +Ref: Derived Files-Footnote-31089823 +Node: Future Extensions1089921 +Node: Implementation Limitations1090498 +Node: Extension Design1091750 +Node: Old Extension Problems1092904 +Ref: Old Extension Problems-Footnote-11094412 +Node: Extension New Mechanism Goals1094469 +Ref: Extension New Mechanism Goals-Footnote-11097834 +Node: Extension Other Design Decisions1098020 +Node: Extension Future Growth1100126 +Node: Old Extension Mechanism1100962 +Node: Basic Concepts1102702 +Node: Basic High Level1103383 +Ref: figure-general-flow1103654 +Ref: figure-process-flow1104253 +Ref: Basic High Level-Footnote-11107482 +Node: Basic Data Typing1107667 +Node: Glossary1111022 +Node: Copying1136484 +Node: GNU Free Documentation License1174041 +Node: Index1199178 End Tag Table diff --git a/doc/gawk.texi b/doc/gawk.texi index 10486cea..ca07e753 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -13659,10 +13659,18 @@ it is not special. An associative array containing the values of the environment. The array indices are the environment variable names; the elements are the values of the particular environment variables. For example, -@code{ENVIRON["HOME"]} might be @file{/home/arnold}. Changing this array -does not affect the environment passed on to any programs that -@command{awk} may spawn via redirection or the @code{system()} function. -@c (In a future version of @command{gawk}, it may do so.) +@code{ENVIRON["HOME"]} might be @file{/home/arnold}. + +For POSIX @command{awk}, changing this array does not affect the +environment passed on to any programs that @command{awk} may spawn via +redirection or the @code{system()} function. + +However, beginning with version 4.2, if not in POSIX +compatibility mode, @command{gawk} does update its own environment when +@code{ENVIRON} is changed, thus changing the environment seen by programs +that it creates. You should therefore be especially careful if you +modify @code{ENVIRON["PATH"]"}, which is the search path for finding +executable programs. Some operating systems may not have environment variables. On such systems, the @code{ENVIRON} array is empty (except for diff --git a/doc/gawktexi.in b/doc/gawktexi.in index 771ef1c4..839f22d7 100644 --- a/doc/gawktexi.in +++ b/doc/gawktexi.in @@ -13044,10 +13044,18 @@ it is not special. An associative array containing the values of the environment. The array indices are the environment variable names; the elements are the values of the particular environment variables. For example, -@code{ENVIRON["HOME"]} might be @file{/home/arnold}. Changing this array -does not affect the environment passed on to any programs that -@command{awk} may spawn via redirection or the @code{system()} function. -@c (In a future version of @command{gawk}, it may do so.) +@code{ENVIRON["HOME"]} might be @file{/home/arnold}. + +For POSIX @command{awk}, changing this array does not affect the +environment passed on to any programs that @command{awk} may spawn via +redirection or the @code{system()} function. + +However, beginning with version 4.2, if not in POSIX +compatibility mode, @command{gawk} does update its own environment when +@code{ENVIRON} is changed, thus changing the environment seen by programs +that it creates. You should therefore be especially careful if you +modify @code{ENVIRON["PATH"]"}, which is the search path for finding +executable programs. Some operating systems may not have environment variables. On such systems, the @code{ENVIRON} array is empty (except for @@ -1121,6 +1121,10 @@ load_environ() */ path_environ("AWKPATH", defpath); path_environ("AWKLIBPATH", deflibpath); + + /* set up array functions */ + init_env_array(ENVIRON_node); + return ENVIRON_node; } diff --git a/str_array.c b/str_array.c index aa82d71b..33c9ddcc 100644 --- a/str_array.c +++ b/str_array.c @@ -69,6 +69,25 @@ afunc_t str_array_func[] = { (afunc_t) 0, }; +static NODE **env_remove(NODE *symbol, NODE *subs); +static NODE **env_store(NODE *symbol, NODE *subs); +static NODE **env_clear(NODE *symbol, NODE *subs); + +/* special case for ENVIRON */ +afunc_t env_array_func[] = { + str_array_init, + (afunc_t) 0, + null_length, + str_lookup, + str_exists, + env_clear, + env_remove, + str_list, + str_copy, + str_dump, + env_store, +}; + static inline NODE **str_find(NODE *symbol, NODE *s1, size_t code1, unsigned long hash1); static void grow_table(NODE *symbol); @@ -737,3 +756,63 @@ scramble(unsigned long x) return x; } + +/* env_remove --- for ENVIRON, remove value from real environment */ + +static NODE ** +env_remove(NODE *symbol, NODE *subs) +{ + NODE **val = str_remove(symbol, subs); + + if (val != NULL) + (void) unsetenv(subs->stptr); + + return val; +} + +/* env_clear --- clear out the environment when ENVIRON is deleted */ + +static NODE ** +env_clear(NODE *symbol, NODE *subs) +{ + extern char **environ; + NODE **val = str_clear(symbol, subs); + + environ = NULL; /* ZAP! */ + + /* str_clear zaps the vtable, reset it */ + symbol->array_funcs = env_array_func; + + return val; +} + +/* env_store --- post assign function for ENVIRON, put new value into env */ + +static NODE ** +env_store(NODE *symbol, NODE *subs) +{ + NODE **val = str_exists(symbol, subs); + const char *newval; + + assert(val != NULL); + + newval = (*val)->stptr; + if (newval == NULL) + newval = ""; + + (void) setenv(subs->stptr, newval, 1); + + return val; +} + +/* init_env_array --- set up the pointers for ENVIRON. A bit hacky. */ + +void +init_env_array(NODE *env_node) +{ + /* If POSIX simply don't reset the vtable and things work as before */ + if (do_posix) + return; + + env_node->array_funcs = env_array_func; +} diff --git a/test/ChangeLog b/test/ChangeLog index 07a547f2..3a115112 100644 --- a/test/ChangeLog +++ b/test/ChangeLog @@ -85,6 +85,12 @@ * Makefile.am (badassign1): New test. * badassign1.awk, badassign1.ok: New files. +2013-09-25 Arnold D. Robbins <arnold@skeeve.com> + + * Makfile.am (randtest): New test. + * randtest.sh, randtest.ok: New files. + * rand.ok: Updated to reflect new results based on code change. + 2013-09-13 Arnold D. Robbins <arnold@skeeve.com> * Makefile.am: Fix quoting for generation of Maketests file so diff --git a/test/Makefile.am b/test/Makefile.am index 011e9394..a4f14f18 100644 --- a/test/Makefile.am +++ b/test/Makefile.am @@ -701,6 +701,8 @@ EXTRA_DIST = \ rand-mpfr.ok \ rand.awk \ rand.ok \ + randtest.sh \ + randtest.ok \ range1.awk \ range1.in \ range1.ok \ @@ -963,7 +965,7 @@ BASIC_TESTS = \ paramdup paramres paramtyp paramuninitglobal parse1 parsefld parseme \ pcntplus posix2008sub prdupval prec printf0 printf1 prmarscl prmreuse \ prt1eval prtoeval \ - rand range1 rebt8b1 redfilnm regeq regexprange regrange reindops \ + rand randtest range1 rebt8b1 redfilnm regeq regexprange regrange reindops \ reparse resplit rri1 rs rsnul1nl rsnulbig rsnulbig2 rstest1 rstest2 \ rstest3 rstest4 rstest5 rswhite \ scalar sclforin sclifin sortempty splitargv splitarr splitdef \ @@ -1869,6 +1871,12 @@ dfamb1: AWKPATH="$(srcdir)" $(AWK) -f $@.awk "$(srcdir)"/$@.in >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@ @-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@ + +randtest:: + @echo $@ + @GAWK="$(AWKPROG)" "$(srcdir)"/randtest.sh >_$@ + @-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@ + backbigs1: @echo $@ @[ -z "$$GAWKLOCALE" ] && GAWKLOCALE=en_US.UTF-8; \ diff --git a/test/Makefile.in b/test/Makefile.in index 7264221b..2e656a42 100644 --- a/test/Makefile.in +++ b/test/Makefile.in @@ -919,6 +919,8 @@ EXTRA_DIST = \ rand-mpfr.ok \ rand.awk \ rand.ok \ + randtest.sh \ + randtest.ok \ range1.awk \ range1.in \ range1.ok \ @@ -1180,7 +1182,7 @@ BASIC_TESTS = \ paramdup paramres paramtyp paramuninitglobal parse1 parsefld parseme \ pcntplus posix2008sub prdupval prec printf0 printf1 prmarscl prmreuse \ prt1eval prtoeval \ - rand range1 rebt8b1 redfilnm regeq regexprange regrange reindops \ + rand randtest range1 rebt8b1 redfilnm regeq regexprange regrange reindops \ reparse resplit rri1 rs rsnul1nl rsnulbig rsnulbig2 rstest1 rstest2 \ rstest3 rstest4 rstest5 rswhite \ scalar sclforin sclifin sortempty splitargv splitarr splitdef \ @@ -2264,6 +2266,11 @@ dfamb1: AWKPATH="$(srcdir)" $(AWK) -f $@.awk "$(srcdir)"/$@.in >_$@ 2>&1 || echo EXIT CODE: $$? >>_$@ @-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@ +randtest:: + @echo $@ + @GAWK="$(AWKPROG)" "$(srcdir)"/randtest.sh >_$@ + @-$(CMP) "$(srcdir)"/$@.ok _$@ && rm -f _$@ + backbigs1: @echo $@ @[ -z "$$GAWKLOCALE" ] && GAWKLOCALE=en_US.UTF-8; \ diff --git a/test/rand.ok b/test/rand.ok index 60432b95..1df4ba39 100644 --- a/test/rand.ok +++ b/test/rand.ok @@ -1 +1 @@ - 62 67 88 6 35 77 3 68 30 96 90 26 35 8 88 93 49 53 37 + 67 6 77 68 96 26 8 93 53 74 53 95 78 74 96 77 33 58 91 diff --git a/test/randtest.ok b/test/randtest.ok new file mode 100644 index 00000000..e69de29b --- /dev/null +++ b/test/randtest.ok diff --git a/test/randtest.sh b/test/randtest.sh new file mode 100755 index 00000000..b17fda73 --- /dev/null +++ b/test/randtest.sh @@ -0,0 +1,113 @@ +# THIS PURPOSELY DOES NOT HAVE A !# LINE !!!! +# +# Date: Mon, 9 Sep 2013 14:49:43 -0700 +# From: Bob Jewett <jewett@bill.scs.agilent.com> +# Message-Id: <201309092149.r89Lnh94010909@bill.scs.agilent.com> +# To: arnold@skeeve.com +# Subject: Re: [bug-gawk] Bug in random() in builtin.c +# +# Hi Arnold, +# +# Attached below is a script that tests gawk for this particular +# rand() problem. The pair-wise combinations show a strong +# autocorrelation for a delay of 31 pairs of rand() samples. +# +# The script prints out the measured autocorrelation for a record +# of NSAMPLES pairs. It also prints a fail message at the end if +# it fails. +# +# If you want to see the autocorrelation values, there is a print +# statement that if uncommented will save them to a file. +# +# Please let me know if the mailer screws up the transfer or +# if you have any questions about the test. +# +# Best regards, +# Bob +# +# -------------- test_pair_power_autocorrelation ----------------------- +# +#!/bin/ksh + +#GAWK=/bin/gawk + +# ADR: Get GAWK from the environment. +# Additional note: This wants ksh/bash for the use of $RANDOM below to +# seed the generator. However, shells that don't provide it won't be +# a problem since gawk will then seed the generator with the time of day, +# as srand() will be called without an argument. + +# large NSAMPLES and NRUNS will bring any correlation out of the noise better +NSAMPLES=1024; MAX_ALLOWED_SIGMA=5; NRUNS=50; + +$GAWK 'BEGIN{ + srand('$RANDOM'); + nsamples=('$NSAMPLES'); + max_allowed_sigma=('$MAX_ALLOWED_SIGMA'); + nruns=('$NRUNS'); + for(tau=0;tau<nsamples/2;tau++) corr[tau]=0; + + for(run=0;run<nruns;run++) { + sum=0; + + # Fill an array with a sequence of samples that are a + # function of pairs of rand() values. + + for(i=0;i<nsamples;i++) { + samp[i]=((rand()-0.5)*(rand()-0.5))^2; + sum=sum+samp[i]; + } + + # Subtract off the mean of the sequence: + + mean=sum/nsamples; + for(i=0;i<nsamples;i++) samp[i]=samp[i]-mean; + + # Calculate an autocorrelation function on the sequence. + # Because the values of rand() should be independent, there + # should be no peaks in the autocorrelation. + + for(tau=0;tau<nsamples/2;tau++) { + sum=0; + for(i=0;i<nsamples/2;i++) sum=sum+samp[i]*samp[i+tau]; + corr[tau]=corr[tau]+sum; + } + + } + # Normalize the autocorrelation to the tau=0 value. + + max_corr=corr[0]; + for(tau=0;tau<nsamples/2;tau++) corr[tau]=corr[tau]/max_corr; + + # OPTIONALLY Print out the autocorrelation values: + + # for(tau=0;tau<nsamples/2;tau++) print tau, corr[tau] > "pairpower_corr.data"; + + # Calculate the sigma for the non-zero tau values: + + power_sum=0; + + for(tau=1;tau<nsamples/2;tau++) power_sum=power_sum+(corr[tau])^2; + + sigma=sqrt(power_sum/(nsamples/2-1)); + + # See if any of the correlations exceed a reasonable number of sigma: + + passed=1; + for(tau=1;tau<nsamples/2;tau++) { + if ( abs(corr[tau])/sigma > max_allowed_sigma ) { + print "Tau=", tau ", Autocorr=", corr[tau]/sigma, "sigma"; + passed=0; + } + } + if(!passed) { + print "Test failed." + exit(1); + } + else exit (0); + } + +function abs(abs_input) { return(sqrt(abs_input^2)) ; } +' + +exit 0 @@ -1,3 +1,3 @@ #include "config.h" -const char *version_string = "GNU Awk 4.1.0a"; +const char *version_string = "GNU Awk 4.1.60"; |