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[gawk-diffs] [SCM] gawk branch, feature/better-index, updated. gawk-4.1.
|
From: |
Arnold Robbins |
|
Subject: |
[gawk-diffs] [SCM] gawk branch, feature/better-index, updated. gawk-4.1.0-3737-gc0d4861 |
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Date: |
Sun, 21 Apr 2019 11:03:42 -0400 (EDT) |
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http://git.sv.gnu.org/cgit/gawk.git/commit/?id=c0d4861e21c806b8ad61e6e3a6cdf95e4335895e
commit c0d4861e21c806b8ad61e6e3a6cdf95e4335895e
Merge: 5fb0824 d3b5c77
Author: Arnold D. Robbins <address@hidden>
Date: Sun Apr 21 18:03:34 2019 +0300
Merge branch 'master' into feature/better-index
diff --cc doc/gawk.texi
index 8011238,4b146a5..1e40816
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@@ -4349,12 -4340,15 +4349,15 @@@ As with @option{-f}, the @option{-e} an
options may also be used multiple times on the command line.
@cindex @option{-e} option
- If no @option{-f} or @option{-e} option is specified, then @command{gawk}
- uses the first nonoption command-line argument as the text of the
- program source code.
+ If no @option{-f} option (or @option{-e} option for @command{gawk})
+ is specified, then @command{awk} uses the first nonoption command-line
+ argument as the text of the program source code. Arguments on
+ the command line that follow the program text are entered into the
+ @code{ARGV} array; @command{awk} does @emph{not} continue to parse the
+ command line looking for options.
@cindex @env{POSIXLY_CORRECT} environment variable
address@hidden lint checking, @env{POSIXLY_CORRECT} environment variable
address@hidden lint checking @subentry @env{POSIXLY_CORRECT} environment
variable
@cindex POSIX mode
If the environment variable @env{POSIXLY_CORRECT} exists,
then @command{gawk} behaves in strict POSIX mode, exactly as if
@@@ -41590,8 -41604,15 +41628,15 @@@ This is an embeddable @command{awk} int
@command{mawk}. For more information, see
@uref{http://repo.hu/projects/libmawk/}.
+ @cindex source code, embeddable @command{awk} interpreter
+ @cindex Neacsu, Mircea
+ @item Mircea Neacsu's Embeddable @command{awk}
+ Mircea Neacsu has created an embeddable @command{awk}
+ interpreter, based on BWK awk. It's available
+ at @uref{https://github.com/neacsum/awk}.
+
@item @code{pawk}
address@hidden source code, @command{pawk} (Python version)
address@hidden source code @subentry @command{pawk} (Python version)
@cindex @code{pawk}, @command{awk}-like facilities for Python
This is a Python module that claims to bring @command{awk}-like
features to Python. See @uref{https://github.com/alecthomas/pawk}
diff --cc doc/gawktexi.in
index a114380,757fb4c..0a46747
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@@ -4259,12 -4250,15 +4259,15 @@@ As with @option{-f}, the @option{-e} an
options may also be used multiple times on the command line.
@cindex @option{-e} option
- If no @option{-f} or @option{-e} option is specified, then @command{gawk}
- uses the first nonoption command-line argument as the text of the
- program source code.
+ If no @option{-f} option (or @option{-e} option for @command{gawk})
+ is specified, then @command{awk} uses the first nonoption command-line
+ argument as the text of the program source code. Arguments on
+ the command line that follow the program text are entered into the
+ @code{ARGV} array; @command{awk} does @emph{not} continue to parse the
+ command line looking for options.
@cindex @env{POSIXLY_CORRECT} environment variable
address@hidden lint checking, @env{POSIXLY_CORRECT} environment variable
address@hidden lint checking @subentry @env{POSIXLY_CORRECT} environment
variable
@cindex POSIX mode
If the environment variable @env{POSIXLY_CORRECT} exists,
then @command{gawk} behaves in strict POSIX mode, exactly as if
@@@ -40642,8 -40577,15 +40680,15 @@@ This is an embeddable @command{awk} int
@command{mawk}. For more information, see
@uref{http://repo.hu/projects/libmawk/}.
+ @cindex source code, embeddable @command{awk} interpreter
+ @cindex Neacsu, Mircea
+ @item Mircea Neacsu's Embeddable @command{awk}
+ Mircea Neacsu has created an embeddable @command{awk}
+ interpreter, based on BWK awk. It's available
+ at @uref{https://github.com/neacsum/awk}.
+
@item @code{pawk}
address@hidden source code, @command{pawk} (Python version)
address@hidden source code @subentry @command{pawk} (Python version)
@cindex @code{pawk}, @command{awk}-like facilities for Python
This is a Python module that claims to bring @command{awk}-like
features to Python. See @uref{https://github.com/alecthomas/pawk}
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=5fb082420462c7b6037d08e39944f932065816f8
commit 5fb082420462c7b6037d08e39944f932065816f8
Author: Arnold D. Robbins <address@hidden>
Date: Sun Apr 21 13:47:24 2019 +0300
More indexing.
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index e2e51a1..a114380 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -2134,10 +2134,10 @@ convincing me @emph{not} to title this @value{DOCUMENT}
@cite{How to Gawk Politely}.
Karl Berry helped significantly with the @TeX{} part of Texinfo.
address@hidden Hartholz, Marshall
address@hidden Hartholz, Elaine
address@hidden Schreiber, Bert
address@hidden Schreiber, Rita
address@hidden Hartholz @subentry Marshall
address@hidden Hartholz @subentry Elaine
address@hidden Schreiber @subentry Bert
address@hidden Schreiber @subentry Rita
I would like to thank Marshall and Elaine Hartholz of Seattle and
Dr.@: Bert and Rita Schreiber of Detroit for large amounts of quiet vacation
time in their homes, which allowed me to make significant progress on
@@ -2251,9 +2251,9 @@ and for being a role model to me for close to 30 years!
Having him as a reviewer is an exciting privilege. It has also
been extremely address@hidden
address@hidden Robbins, Miriam
address@hidden Robbins, Jean
address@hidden Robbins, Harry
address@hidden Robbins @subentry Miriam
address@hidden Robbins @subentry Jean
address@hidden Robbins @subentry Harry
@cindex G-d
I must thank my wonderful wife, Miriam, for her patience through
the many versions of this project, for her proofreading,
@@ -2581,7 +2581,7 @@ affect the execution of the @command{awk} program but it
does make
@subsection Executable @command{awk} Programs
@cindex @command{awk} programs
@cindex @code{#} (number sign) @subentry @code{#!} (executable scripts)
address@hidden Unix, @command{awk} scripts and
address@hidden Unix @subentry @command{awk} scripts and
@cindex number sign (@code{#}) @subentry @code{#!} (executable scripts)
Once you have learned @command{awk}, you may want to write self-contained
@@ -4046,8 +4046,8 @@ if @command{gawk} is not compiled to use the GNU MPFR and
MP libraries
@itemx @option{--non-decimal-data}
@cindex @option{-n} option
@cindex @option{--non-decimal-data} option
address@hidden hexadecimal address@hidden enabling interpretation of
address@hidden octal address@hidden enabling interpretation of
address@hidden hexadecimal values, enabling interpretation of
address@hidden octal values, enabling interpretation of
@cindex troubleshooting @subentry @code{--non-decimal-data} option
Enable automatic interpretation of octal and hexadecimal
values in input data
@@ -5083,7 +5083,7 @@ $ @kbd{awk '/li/ @{ print $2 @}' mail-list}
@cindex exclamation point (@code{!}) @subentry @code{!~} operator
@c @cindex operators, @code{!~}
@cindex @code{if} statement @subentry use of regexps in
address@hidden @code{while} statement, use of regexps in
address@hidden @code{while} statement @subentry use of regexps in
@cindex @address@hidden statement @subentry use of regexps in
@c @cindex statements, @code{if}
@c @cindex statements, @code{while}
@@ -5910,7 +5910,7 @@ two characters @samp{\} and @samp{*}.
@cindex troubleshooting @subentry regexp constants vs.@: string constants
@cindex regexp constants @subentry vs.@: string constants
address@hidden string constants, vs.@: regexp constants
address@hidden string @subentry constants @subentry vs.@: regexp constants
Given that you can use both regexp and string constants to describe
regular expressions, which should you use? The answer is ``regexp
constants,'' for several reasons:
@@ -6033,7 +6033,7 @@ For example, @code{/stow\>/} matches @samp{stow} but not
@samp{stowaway}.
@c @cindex operators, @code{\y} (@command{gawk})
@cindex backslash (@code{\}) @subentry @code{\y} operator (@command{gawk})
@cindex @code{\} (backslash) @subentry @code{\y} operator (@command{gawk})
address@hidden word address@hidden matching
address@hidden word boundaries, matching
@item \y
Matches the empty string at either the beginning or the
end of a word (i.e., the word address@hidden). For example, @samp{\yballs?\y}
@@ -6506,7 +6506,7 @@ even if the last character in the file is not the
character in @code{RS}.
@cindex empty strings @seeentry{null strings}
@cindex null strings
address@hidden strings, empty @seeentry{null strings}
address@hidden strings @subentry empty @seeentry{null strings}
The empty string @code{""} (a string without any characters)
has a special meaning
as the value of @code{RS}. It means that records are separated
@@ -6678,7 +6678,7 @@ simple @command{awk} programs so powerful.
@cindex field operator @code{$}
@cindex @code{$} (dollar sign) @subentry @code{$} field operator
@cindex dollar sign (@code{$}) @subentry @code{$} field operator
address@hidden field address@hidden dollar sign as
address@hidden field operators, dollar sign as
You use a dollar sign (@samp{$})
to refer to a field in an @command{awk} program,
followed by the number of the field you want. Thus, @code{$1}
@@ -7339,7 +7339,7 @@ encrypted or shadow password. (A shadow password is
indicated by the
presence of a single @samp{x} in the second field.) A password file
entry might look like this:
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Arnold
@example
arnold:x:2076:10:Arnold Robbins:/home/arnold:/bin/bash
@end example
@@ -8370,9 +8370,9 @@ bletch
@noindent
the program might produce:
address@hidden Robbins, Bill
address@hidden Robbins, Miriam
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Bill
address@hidden Robbins @subentry Miriam
address@hidden Robbins @subentry Arnold
@example
foo
bar
@@ -9160,7 +9160,7 @@ runs together on a single line.
@node OFMT
@section Controlling Numeric Output with @code{print}
@cindex numeric @subentry output format
address@hidden address@hidden numeric output
address@hidden formats, numeric output
When printing numeric values with the @code{print} statement,
@command{awk} internally converts each number to a string of characters
and prints that string. @command{awk} uses the @code{sprintf()} function
@@ -9433,7 +9433,7 @@ the IEEE standard. Further details are provided in
@subsection Modifiers for @code{printf} Formats
@cindex @code{printf} statement @subentry modifiers
address@hidden address@hidden in format specifiers
address@hidden modifiers, in format specifiers
A format specification can also include @dfn{modifiers} that can control
how much of the item's value is printed, as well as how much space it gets.
The modifiers come between the @samp{%} and the format-control letter.
@@ -10097,7 +10097,7 @@ above two, does actually close the given file
descriptor.
@node Special Network
@subsection Special Files for Network Communications
@cindex networks @subentry support for
address@hidden TCP/IP, support for
address@hidden TCP/IP @subentry support for
@command{gawk} programs
can open a two-way
@@ -10326,7 +10326,7 @@ which describes it in more detail and gives an example.
@sidebar Using @code{close()}'s Return Value
@cindex dark corner @subentry @code{close()} function
@cindex @code{close()} function @subentry return value
address@hidden return address@hidden @code{close()} function
address@hidden return value, @code{close()} function
@cindex differences in @command{awk} and @command{gawk} @subentry
@code{close()} function
@cindex Unix @command{awk} @subentry @code{close()} function and
@@ -10597,7 +10597,7 @@ have the same value:
1050e-1
@end example
address@hidden string constants
address@hidden string @subentry constants
@cindex constants @subentry string
A @dfn{string constant} consists of a sequence of characters enclosed in
double quotation marks. For example:
@@ -11185,7 +11185,7 @@ concatenated together. The resulting string is
converted back to the
number 23, to which 4 is then added.
@cindex null strings @subentry converting numbers to strings
address@hidden type conversion
address@hidden type @subentry conversion
If, for some reason, you need to force a number to be converted to a
string, concatenate that number with the empty string, @code{""}.
To force a string to be converted to a number, add zero to that string.
@@ -11458,7 +11458,7 @@ For maximum portability, do not use the @samp{**}
operator.
@author Brian Kernighan
@end quotation
address@hidden string operators
address@hidden string @subentry operators
@cindex operators @subentry string
@cindex concatenating
There is only one string operation: concatenation. It does not have a
@@ -12051,8 +12051,7 @@ the string constant @code{"0"} is actually true,
because it is non-null.
@cindex expressions, matching @seeentry{comparison expressions}
@cindex matching, expressions @seeentry{comparison expressions}
@cindex relational operators @seeentry{comparison operators}
address@hidden operators, relational @address@hidden comparison}
address@hidden variable typing
address@hidden operators, relational @seeentry{operators, comparison}
@cindex variables @subentry types of @subentry comparison expressions and
Unlike in other programming languages, in @command{awk} variables do not have a
fixed type. Instead, they can be either a number or a string, depending
@@ -13913,7 +13912,7 @@ For deleting array elements.
control the flow of execution in @command{awk} programs. Most of
@command{awk}'s
control statements are patterned after similar statements in C.
address@hidden compound address@hidden control statements and
address@hidden compound statements, control statements and
@cindex statements @subentry compound, control statements and
@cindex body @subentry in actions
@cindex @address@hidden@}} (braces) @subentry statements, grouping
@@ -15228,7 +15227,7 @@ Assigning a new value to this element changes the
default.
The value of the @code{getuid()} system call.
@item PROCINFO["version"]
address@hidden version of @command{gawk}
address@hidden version of @subentry @command{gawk}
@cindex @command{gawk} version
The version of @command{gawk}.
@end table
@@ -15240,10 +15239,10 @@ if your version of @command{gawk} supports
arbitrary-precision arithmetic
@table @code
@item PROCINFO["gmp_version"]
address@hidden version of GNU MP library
address@hidden version of @subentry GNU MP library
The version of the GNU MP library.
address@hidden version of GNU MPFR library
address@hidden version of @subentry GNU MPFR library
@item PROCINFO["mpfr_version"]
The version of the GNU MPFR library.
@@ -15263,7 +15262,7 @@ of @command{gawk} supports dynamic loading of extension
functions
@table @code
@item PROCINFO["api_major"]
address@hidden version of @command{gawk} extension API
address@hidden version of @subentry @command{gawk} extension API
@cindex extension API @subentry version number
The major version of the extension API.
@@ -16685,7 +16684,7 @@ out an array:@footnote{Thanks to Michael Brennan for
pointing this out.}
split("", array)
@end example
address@hidden @code{split()} function, array address@hidden deleting
address@hidden @code{split()} function @subentry array elements, deleting
The @code{split()} function
(@pxref{String Functions})
clears out the target array first. This call asks it to split
@@ -16720,7 +16719,7 @@ languages, including @command{awk}) to refer to an
element of a
two-dimensional array named @code{grid} is with
@address@hidden,@var{y}]}.
address@hidden @code{SUBSEP} variable, multidimensional arrays and
address@hidden @code{SUBSEP} variable @subentry multidimensional arrays and
Multidimensional arrays are supported in @command{awk} through
concatenation of indices into one string.
@command{awk} converts the indices into strings
@@ -17561,7 +17560,7 @@ and the third argument must be assignable.
@item @code{index(@var{in}, @var{find})}
@cindexawkfunc{index}
address@hidden search in string
address@hidden search for substring
@cindex find substring in string
Search the string @var{in} for the first occurrence of the string
@var{find}, and return the position in characters where that occurrence
@@ -17583,7 +17582,7 @@ constant as an expression meaning @samp{$0 ~ /regexp/}.
@value{DARKCORNER}
@item @code{length(address@hidden@code{)}
@cindexawkfunc{length}
address@hidden string length
address@hidden string @subentry length
@cindex length of string
Return the number of characters in @var{string}. If
@var{string} is a number, the length of the digit string representing
@@ -17659,7 +17658,7 @@ If @option{--posix} is supplied, using an array
argument is a fatal error
@item @code{match(@var{string}, @var{regexp}} address@hidden, @address@hidden)}
@cindexawkfunc{match}
address@hidden string, regular expression match
address@hidden string @subentry regular expression match
@cindex match regexp in string
Search @var{string} for the
longest, leftmost substring matched by the regular expression
@@ -17683,6 +17682,8 @@ for @code{match()}, the order is the same as for the
@samp{~} operator:
@cindex @code{RSTART} variable @subentry @code{match()} function and
@cindex @code{RLENGTH} variable @subentry @code{match()} function and
@cindex @code{match()} function @subentry @code{RSTART}/@code{RLENGTH}
variables
address@hidden @code{match()} function @subentry side effects
address@hidden side effects @subentry @code{match()} function
The @code{match()} function sets the predefined variable @code{RSTART} to
the index. It also sets the predefined variable @code{RLENGTH} to the
length in characters of the matched substring. If no match is found,
@@ -17830,7 +17831,7 @@ split("cul-de-sac", a, "-", seps)
@end example
@noindent
address@hidden strings splitting @subentry example
address@hidden strings @subentry splitting, example
splits the string @code{"cul-de-sac"} into three fields using @samp{-} as the
separator. It sets the contents of the array @code{a} as follows:
@@ -18006,6 +18007,8 @@ an @samp{&}:
@cindex @code{sub()} function @subentry arguments of
@cindex @code{gsub()} function @subentry arguments of
address@hidden side effects @subentry @code{sub()} function
address@hidden side effects @subentry @code{gsub()} function
As mentioned, the third argument to @code{sub()} must
be a variable, field, or array element.
Some versions of @command{awk} allow the third argument to
@@ -19285,6 +19288,7 @@ Here is a user-defined function (@pxref{User-defined})
that illustrates the use of these functions:
@cindex @code{bits2str()} user-defined function
address@hidden user-defined @subentry function @subentry @code{bits2str()}
@cindex @code{testbits.awk} program
@example
@group
@@ -19455,8 +19459,8 @@ that traverses every element of an array of arrays
Return a true value if @var{x} is an array. Otherwise, return false.
@cindexgawkfunc{typeof}
address@hidden variable type
address@hidden type, of variable
address@hidden variable type, @code{typeof()} function (@command{gawk})
address@hidden type @subentry of variable, @code{typeof()} function
(@command{gawk})
@item typeof(@var{x})
Return one of the following strings, depending upon the type of @var{x}:
@@ -19552,7 +19556,7 @@ Optional parameters are enclosed in square brackets ([
]):
@table @asis
@cindexgawkfunc{bindtextdomain}
address@hidden set directory of message catalogs
address@hidden set @subentry directory of message catalogs
@item @code{bindtextdomain(@var{directory}} address@hidden,} @address@hidden)}
Set the directory in which
@command{gawk} will look for message translation files, in case they
@@ -19587,7 +19591,7 @@ The default value for @var{category} is
@code{"LC_MESSAGES"}.
@node User-defined
@section User-Defined Functions
address@hidden user-defined functions
address@hidden user-defined @subentry functions
@cindex functions @subentry user-defined
Complicated @command{awk} programs can often be simplified by defining
your own functions. User-defined functions can be called just like
@@ -19824,6 +19828,7 @@ already empty:
@c 8/2014: Thanks to Mike Brennan for the improved formulation
@cindex @code{rev()} user-defined function
address@hidden user-defined @subentry function @subentry @code{rev()}
@example
function rev(str)
@{
@@ -19850,6 +19855,7 @@ The following example uses the built-in
@code{strftime()} function
to create an @command{awk} version of @code{ctime()}:
@cindex @code{ctime()} user-defined function
address@hidden user-defined @subentry function @subentry @code{ctime()}
@example
@c file eg/lib/ctime.awk
# ctime.awk
@@ -20207,7 +20213,7 @@ don't like the warning, fix your code! It's incorrect,
after all.)
@node Return Statement
@subsection The @code{return} Statement
address@hidden @code{return} address@hidden user-defined functions
address@hidden @code{return} statement, user-defined functions
As seen in several earlier examples,
the body of a user-defined function can contain a @code{return} statement.
@@ -21139,6 +21145,7 @@ be tested with @command{gawk} and the results compared
to the built-in
@cindex assertions
@cindex @code{assert()} function (C library)
address@hidden C library functions @subentry @code{assert()}
@cindex libraries of @command{awk} functions @subentry assertions
@cindex functions @subentry library @subentry assertions
@cindex @command{awk} programs @subentry lengthy @subentry assertions
@@ -21172,6 +21179,7 @@ prog.c:5: assertion failed: a <= 5 && b >= 17.1
@end example
@cindex @code{assert()} user-defined function
address@hidden user-defined @subentry function @subentry @code{assert()}
The C language makes it possible to turn the condition into a string for use
in printing the diagnostic message. This is not possible in @command{awk}, so
this @code{assert()} function also requires a string version of the condition
@@ -21267,7 +21275,7 @@ with an @code{exit} statement.
@cindex functions @subentry library @subentry rounding numbers
@cindex @code{print} statement @subentry @code{sprintf()} function and
@cindex @code{printf} statement @subentry @code{sprintf()} function and
address@hidden @code{sprintf()} function, @code{print}/@code{printf} statements
and
address@hidden @code{sprintf()} function @subentry @code{print}/@code{printf}
statements and
The way @code{printf} and @code{sprintf()}
(@pxref{Printf})
perform rounding often depends upon the system's C @code{sprintf()}
@@ -21281,6 +21289,7 @@ traditional rounding; it might be useful if your
@command{awk}'s @code{printf}
does unbiased rounding:
@cindex @code{round()} user-defined function
address@hidden user-defined @subentry function @subentry @code{round()}
@example
@c file eg/lib/round.awk
# round.awk --- do normal rounding
@@ -21340,6 +21349,7 @@ for randomness by showing no structure.''
It is easily programmed, in less than 10 lines of @command{awk} code:
@cindex @code{cliff_rand()} user-defined function
address@hidden user-defined @subentry function @subentry @code{cliff_rand()}
@example
@c file eg/lib/cliff_rand.awk
# cliff_rand.awk --- generate Cliff random numbers
@@ -21389,8 +21399,11 @@ Both functions are written very nicely in
@command{awk}; there is no real
reason to build them into the @command{awk} interpreter:
@cindex @code{ord()} user-defined function
address@hidden user-defined @subentry function @subentry @code{ord()}
@cindex @code{chr()} user-defined function
address@hidden user-defined @subentry function @subentry @code{chr()}
@cindex @code{_ord_init()} user-defined function
address@hidden user-defined @subentry function @subentry @code{_ord_init()}
@example
@c file eg/lib/ord.awk
# ord.awk --- do ord and chr
@@ -21517,6 +21530,7 @@ assumption, as the array was likely created with
@code{split()}
(@pxref{String Functions}):
@cindex @code{join()} user-defined function
address@hidden user-defined @subentry function @subentry @code{join()}
@example
@c file eg/lib/join.awk
# join.awk --- join an array into a string
@@ -21575,6 +21589,7 @@ with preformatted time information. It returns a
string with the current
time formatted in the same way as the @command{date} utility:
@cindex @code{getlocaltime()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getlocaltime()}
@example
@c file eg/lib/gettime.awk
# getlocaltime.awk --- get the time of day in a usable format
@@ -21686,6 +21701,7 @@ The following function, based on a suggestion by Denis
Shirokov,
reads the entire contents of the named file in one shot:
@cindex @code{readfile()} user-defined function
address@hidden user-defined @subentry function @subentry @code{readfile()}
@example
@c file eg/lib/readfile.awk
# readfile.awk --- read an entire file at once
@@ -21898,7 +21914,9 @@ supplied in the ``main'' program, @code{endfile()} is
called first. Once
again, the value of multiple @code{BEGIN} and @code{END} rules should be clear.
@cindex @code{beginfile()} user-defined function
address@hidden user-defined @subentry function @subentry @code{beginfile()}
@cindex @code{endfile()} user-defined function
address@hidden user-defined @subentry function @subentry @code{endfile()}
If the same @value{DF} occurs twice in a row on the command line, then
@code{endfile()} and @code{beginfile()} are not executed at the end of the
first pass and at the beginning of the second pass.
@@ -21966,6 +21984,7 @@ and then start over with it from the top.
For lack of a better name, we'll call the function @code{rewind()}:
@cindex @code{rewind()} user-defined function
address@hidden user-defined @subentry function @subentry @code{rewind()}
@example
@c file eg/lib/rewind.awk
# rewind.awk --- rewind the current file and start over
@@ -22040,7 +22059,7 @@ $ @kbd{gawk -f rewind.awk -f test.awk data }
@subsection Checking for Readable @value{DDF}s
@cindex troubleshooting @subentry readable data files
address@hidden readable data address@hidden checking
address@hidden readable data files, checking
@cindex files @subentry skipping
Normally, if you give @command{awk} a @value{DF} that isn't readable,
it stops with a fatal error. There are times when you might want to
@@ -22079,7 +22098,7 @@ BEGIN @{
@c endfile
@end example
address@hidden troubleshooting @subentry @code{getline} function
address@hidden troubleshooting @subentry @code{getline} command
This works, because the @code{getline} won't be fatal.
Removing the element from @code{ARGV} with @code{delete}
skips the file (because it's no longer in the list).
@@ -22233,6 +22252,7 @@ The first occurrence on the command line of either
@option{--} or a
string that does not begin with @samp{-} ends the options.
@cindex @code{getopt()} function (C library)
address@hidden C library functions @subentry @code{getopt()}
Modern Unix systems provide a C function named @code{getopt()} for processing
command-line arguments. The programmer provides a string describing the
one-letter options. If an option requires an argument, it is followed in the
@@ -22336,6 +22356,7 @@ We have left it alone, as using @code{substr()} is more
portable.}
The discussion that follows walks through the code a bit at a time:
@cindex @code{getopt()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getopt()}
@example
@c file eg/lib/getopt.awk
# getopt.awk --- Do C library getopt(3) function in awk
@@ -22378,6 +22399,7 @@ a string of options (the @code{options} parameter). If
@code{options}
has a zero length, @code{getopt()} immediately returns @minus{}1:
@cindex @code{getopt()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getopt()}
@example
@c file eg/lib/getopt.awk
function getopt(argc, argv, options, thisopt, i)
@@ -22592,7 +22614,9 @@ user database. @xref{Group Functions}
for a similar suite that retrieves information from the group database.
@cindex @code{getpwent()} function (C library)
address@hidden C library functions @subentry @code{getpwent()}
@cindex @code{getpwent()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getpwent()}
@cindex users @subentry information about @subentry retrieving
@cindex login information
@cindex account information
@@ -22725,8 +22749,8 @@ shell, such as Bash.
A few lines representative of @command{pwcat}'s output are as follows:
@cindex Jacobs, Andrew
address@hidden Robbins, Arnold
address@hidden Robbins, Miriam
address@hidden Robbins @subentry Arnold
address@hidden Robbins @subentry Miriam
@example
$ @kbd{pwcat}
@print{} root:x:0:1:Operator:/:/bin/sh
@@ -22745,6 +22769,7 @@ information. There are several functions here,
corresponding to the C
functions of the same names:
@cindex @code{_pw_init()} user-defined function
address@hidden user-defined @subentry function @subentry @code{_pw_init()}
@example
@c file eg/lib/passwdawk.in
# passwd.awk --- access password file information
@@ -22837,12 +22862,14 @@ if necessary), @code{RS}, and @code{$0}.
The use of @address@hidden is explained shortly.
@cindex @code{getpwnam()} function (C library)
address@hidden C library functions @subentry @code{getpwnam()}
The @code{getpwnam()} function takes a username as a string argument. If that
user is in the database, it returns the appropriate line. Otherwise, it
relies on the array reference to a nonexistent
element to create the element with the null string as its value:
@cindex @code{getpwnam()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getpwnam()}
@example
@group
@c file eg/lib/passwdawk.in
@@ -22856,11 +22883,13 @@ function getpwnam(name)
@end example
@cindex @code{getpwuid()} function (C library)
address@hidden C library functions @subentry @code{getpwuid()}
Similarly, the @code{getpwuid()} function takes a user ID number
argument. If that user number is in the database, it returns the
appropriate line. Otherwise, it returns the null string:
@cindex @code{getpwuid()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getpwuid()}
@example
@c file eg/lib/passwdawk.in
function getpwuid(uid)
@@ -22872,11 +22901,13 @@ function getpwuid(uid)
@end example
@cindex @code{getpwent()} function (C library)
address@hidden C library functions @subentry @code{getpwent()}
The @code{getpwent()} function simply steps through the database, one entry at
a time. It uses @code{_pw_count} to track its current position in the
@code{_pw_bycount} array:
@cindex @code{getpwent()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getpwent()}
@example
@c file eg/lib/passwdawk.in
function getpwent()
@@ -22890,10 +22921,12 @@ function getpwent()
@end example
@cindex @code{endpwent()} function (C library)
address@hidden C library functions @subentry @code{endpwent()}
The @address@hidden()}} function resets @address@hidden to zero, so that
subsequent calls to @code{getpwent()} start over again:
@cindex @code{endpwent()} user-defined function
address@hidden user-defined @subentry function @subentry @code{endpwent()}
@example
@c file eg/lib/passwdawk.in
function endpwent()
@@ -22934,7 +22967,9 @@ uses these functions.
@cindex database @subentry group, reading
@cindex @code{PROCINFO} array @subentry group membership and
@cindex @code{getgrent()} function (C library)
address@hidden C library functions @subentry @code{getgrent()}
@cindex @code{getgrent()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getgrent()}
@cindex groups, information about
@cindex account information
@cindex group file
@@ -23076,6 +23111,7 @@ There are several, modeled after the C library
functions of the same names:
@cindex @code{getline} command @subentry @code{_gr_init()} user-defined
function
@cindex @code{_gr_init()} user-defined function
address@hidden user-defined @subentry function @subentry @code{_gr_init()}
@example
@c file eg/lib/groupawk.in
# group.awk --- functions for dealing with the group file
@@ -23189,6 +23225,7 @@ initializes @code{_gr_count} to zero
(it is used later), and makes @code{_gr_inited} nonzero.
@cindex @code{getgrnam()} function (C library)
address@hidden C library functions @subentry @code{getgrnam()}
The @code{getgrnam()} function takes a group name as its argument, and if that
group exists, it is returned.
Otherwise, it
@@ -23196,6 +23233,7 @@ relies on the array reference to a nonexistent
element to create the element with the null string as its value:
@cindex @code{getgrnam()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getgrnam()}
@example
@c file eg/lib/groupawk.in
function getgrnam(group)
@@ -23207,10 +23245,12 @@ function getgrnam(group)
@end example
@cindex @code{getgrgid()} function (C library)
address@hidden C library functions @subentry @code{getgrgid()}
The @code{getgrgid()} function is similar; it takes a numeric group ID and
looks up the information associated with that group ID:
@cindex @code{getgrgid()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getgrgid()}
@example
@c file eg/lib/groupawk.in
function getgrgid(gid)
@@ -23222,10 +23262,12 @@ function getgrgid(gid)
@end example
@cindex @code{getgruser()} function (C library)
address@hidden C library functions @subentry @code{getgruser()}
The @code{getgruser()} function does not have a C counterpart. It takes a
username and returns the list of groups that have the user as a member:
@cindex @code{getgruser()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getgruser()}
@example
@c file eg/lib/groupawk.in
function getgruser(user)
@@ -23237,10 +23279,12 @@ function getgruser(user)
@end example
@cindex @code{getgrent()} function (C library)
address@hidden C library functions @subentry @code{getgrent()}
The @code{getgrent()} function steps through the database one entry at a time.
It uses @code{_gr_count} to track its position in the list:
@cindex @code{getgrent()} user-defined function
address@hidden user-defined @subentry function @subentry @code{getgrent()}
@example
@c file eg/lib/groupawk.in
function getgrent()
@@ -23256,10 +23300,12 @@ function getgrent()
@end example
@cindex @code{endgrent()} function (C library)
address@hidden C library functions @subentry @code{endgrent()}
The @code{endgrent()} function resets @code{_gr_count} to zero so that
@code{getgrent()} can
start over again:
@cindex @code{endgrent()} user-defined function
address@hidden user-defined @subentry function @subentry @code{endgrent()}
@example
@c file eg/lib/groupawk.in
function endgrent()
@@ -23296,6 +23342,7 @@ You call it with the array and a string representing
the name
of the array:
@cindex @code{walk_array()} user-defined function
address@hidden user-defined @subentry function @subentry @code{walk_array()}
@example
@c file eg/lib/walkarray.awk
function walk_array(arr, name, i)
@@ -25109,7 +25156,7 @@ We hope you find them both interesting and enjoyable.
@cindex words @subentry duplicate, searching for
@cindex searching @subentry for words
address@hidden address@hidden searching
address@hidden documents, searching
A common error when writing large amounts of prose is to accidentally
duplicate words. Typically you will see this in text as something like ``the
the program does the address@hidden'' When the text is online, often
@@ -25177,7 +25224,7 @@ word, comparing it to the previous one:
@node Alarm Program
@subsection An Alarm Clock Program
@cindex insomnia, cure for
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Arnold
@quotation
@i{Nothing cures insomnia like a ringing alarm clock.}
@author Arnold Robbins
@@ -25518,7 +25565,7 @@ for inspiration.
@subsection Printing Mailing Labels
@cindex printing @subentry mailing labels
address@hidden mailing address@hidden printing
address@hidden mailing labels, printing
Here is a ``real-world''@footnote{``Real world'' is defined as
``a program actually used to get something done.''}
program. This
@@ -27061,7 +27108,7 @@ things considerably. What problem does this engender
though?
@cindex search paths
@cindex search paths @subentry for source files
address@hidden source address@hidden search path for
address@hidden source files, search path for
@cindex files @subentry source, search path for
@cindex directories @subentry searching @subentry for source files
@item
@@ -27240,7 +27287,7 @@ disabled. If you want it, you must explicitly request
it.
@cindex programming conventions @subentry @code{--non-decimal-data} option
@cindex @option{--non-decimal-data} option @subentry @code{strtonum()}
function and
address@hidden @code{strtonum()} function (@command{gawk}),
@code{--non-decimal-data} option and
address@hidden @code{strtonum()} function (@command{gawk}) @subentry
@code{--non-decimal-data} option and
@quotation CAUTION
@emph{Use of this option is not recommended.}
It can break old programs very badly.
@@ -27552,8 +27599,10 @@ sorted array traversal is not the default.
@cindex arrays @subentry sorting @subentry @code{asorti()} function
(@command{gawk})
@cindexgawkfunc{asort}
@cindex @code{asort()} function (@command{gawk}) @subentry arrays, sorting
address@hidden @code{asort()} function (@command{gawk}) @subentry side effects
@cindexgawkfunc{asorti}
@cindex @code{asorti()} function (@command{gawk}) @subentry arrays, sorting
address@hidden @code{asorti()} function (@command{gawk}) @subentry side effects
@cindex sort function, arrays, sorting
In most @command{awk} implementations, sorting an array requires writing
a @code{sort()} function. This can be educational for exploring
@@ -27578,6 +27627,7 @@ All numeric values come before all string values,
which in turn come before all subarrays.
@cindex side effects @subentry @code{asort()} function
address@hidden side effects @subentry @code{asorti()} function
An important side effect of calling @code{asort()} is that
@emph{the array's original indices are irrevocably lost}.
As this isn't always desirable, @code{asort()} accepts a
@@ -27838,7 +27888,7 @@ These strings tell @command{gawk} to close the end of
the pipe
that sends data to the coprocess or the end that reads from it,
respectively.
address@hidden @command{sort} utility, coprocesses and
address@hidden @command{sort} utility @subentry coprocesses and
This is particularly necessary in order to use
the system @command{sort} utility as part of a coprocess;
@command{sort} must read @emph{all} of its input
@@ -28046,6 +28096,7 @@ respectively. TCP should be used for most applications.
@item local-port
@cindex @code{getaddrinfo()} function (C library)
address@hidden C library functions @subentry @code{getaddrinfo()}
The local TCP or UDP port number to use. Use a port number of @samp{0}
when you want the system to pick a port. This is what you should do
when writing a TCP or UDP client.
@@ -28361,10 +28412,10 @@ $ @kbd{gawk --profile -f myprog &}
[1] 13992
@end example
address@hidden @command{kill} address@hidden dynamic profiling
address@hidden @command{kill} command, dynamic profiling
@cindex @code{USR1} signal, for dynamic profiling
@cindex @code{SIGUSR1} signal, for dynamic profiling
address@hidden signals @subentry @code{USR1}/@code{SIGUSR1} @subentry for
profiling
address@hidden signals @subentry @code{USR1}/@code{SIGUSR1}, for profiling
@noindent
The shell prints a job number and process ID number; in this case, 13992.
Use the @command{kill} command to send the @code{USR1} signal
@@ -28397,7 +28448,7 @@ profile file.
@cindex @code{HUP} signal, for dynamic profiling
@cindex @code{SIGHUP} signal, for dynamic profiling
address@hidden signals @subentry @code{HUP}/@code{SIGHUP} @subentry for
profiling
address@hidden signals @subentry @code{HUP}/@code{SIGHUP}, for profiling
If you use the @code{HUP} signal instead of the @code{USR1} signal,
@command{gawk} produces the profile and the function call trace and then exits.
@@ -28539,7 +28590,7 @@ a requirement.
@section Internationalization and Localization
@cindex internationalization
address@hidden localization @address@hidden localization}
address@hidden localization @seeentry{internationalization, localization}
@cindex internationalization @subentry localization
@dfn{Internationalization} means writing (or modifying) a program once,
in such a way that it can use multiple languages without requiring
@@ -28587,6 +28638,7 @@ A table with strings of option names is not (e.g.,
@command{gawk}'s
language).
@cindex @code{textdomain()} function (C library)
address@hidden C library functions @subentry @code{textdomain()}
@item
The programmer indicates the application's text domain
(@command{"guide"}) to the @command{gettext} library,
@@ -28630,6 +28682,7 @@ When @command{guide} is built and installed, the binary
translation files
are installed in a standard place.
@cindex @code{bindtextdomain()} function (C library)
address@hidden C library functions @subentry @code{bindtextdomain()}
@item
For testing and development, it is possible to tell @command{gettext}
to use @file{.gmo} files in a different directory than the standard
@@ -28652,6 +28705,7 @@ and forth.
@end enumerate
@cindex @code{gettext()} function (C library)
address@hidden C library functions @subentry @code{gettext()}
In C (or C++), the string marking and dynamic translation lookup
are accomplished by wrapping each string in a call to @code{gettext()}:
@@ -28969,7 +29023,7 @@ is covered.
@cindex strings @subentry extracting
@cindex @option{--gen-pot} option
@cindex command line @subentry options @subentry string extraction
address@hidden string extraction (internationalization)
address@hidden string @subentry extraction (internationalization)
@cindex marked string extraction (internationalization)
@cindex extraction, of marked strings (internationalization)
@@ -29923,7 +29977,7 @@ controlling breakpoints are:
@cindex debugger commands @subentry @code{break}
@cindex @code{break} debugger command
@cindex @code{b} debugger command (alias for @code{break})
address@hidden set breakpoint
address@hidden set @subentry breakpoint
@cindex breakpoint @subentry setting
@item @code{break} address@hidden@code{:address@hidden | @var{function}]
address@hidden"@var{expression}"}]
@itemx @code{b} address@hidden@code{:address@hidden | @var{function}]
address@hidden"@var{expression}"}]
@@ -30280,7 +30334,7 @@ You can also set special @command{awk} variables, such
as @code{FS},
@cindex debugger commands @subentry @code{watch}
@cindex @code{watch} debugger command
@cindex @code{w} debugger command (alias for @code{watch})
address@hidden set watchpoint
address@hidden set @subentry watchpoint
@item @code{watch} @var{var} | @address@hidden
address@hidden"@var{expression}"}]
@itemx @code{w} @var{var} | @address@hidden address@hidden"@var{expression}"}]
Add variable @var{var} (or field @address@hidden) to the watch list.
@@ -30386,11 +30440,13 @@ The value for @var{what} should be one of the
following:
@c nested table
@table @code
@item args
address@hidden show function arguments, in debugger
address@hidden show in debugger @subentry function arguments
address@hidden function arguments, show in debugger
List arguments of the selected frame.
@item break
address@hidden show breakpoints
address@hidden show in debugger @subentry breakpoints
address@hidden breakpoints, show in debugger
List all currently set breakpoints.
@item display
@@ -30403,15 +30459,19 @@ Give a description of the selected stack frame.
@item functions
@cindex list function definitions, in debugger
address@hidden function definitions, list in debugger
List all function definitions including source @value{FN}s and
line numbers.
@item locals
address@hidden show local variables, in debugger
address@hidden show in debugger @subentry local variables
address@hidden local variables, show in debugger
List local variables of the selected frame.
@item source
address@hidden show name of current source file, in debugger
address@hidden show in debugger @subentry name of current source file
address@hidden current source file, show in debugger
address@hidden source file, show in debugger
Print the name of the current source file. Each time the program stops, the
current source file is the file containing the current instruction.
When the debugger first starts, the current source file is the first file
@@ -30420,15 +30480,18 @@ included via the @option{-f} option. The
be used at any time to change the current source.
@item sources
address@hidden show all source files, in debugger
address@hidden show in debugger @subentry all source files
address@hidden all source files, show in debugger
List all program sources.
@item variables
@cindex list all global variables, in debugger
address@hidden global variables, show in debugger
List all global variables.
@item watch
address@hidden show watchpoints
address@hidden show in debugger @subentry watchpoints
address@hidden watchpoints, show in debugger
List all items in the watch list.
@end table
@end table
@@ -32957,7 +33020,7 @@ the macros as if they were functions.
@node General Data Types
@subsection General-Purpose Data Types
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Arnold
@cindex Ramey, Chet
@quotation
@i{I have a true love/hate relationship with unions.}
@@ -38994,7 +39057,7 @@ distribution.
Juan Manuel Guerrero took over maintenance of the DJGPP port.
@item
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Arnold
Arnold Robbins
has been working on @command{gawk} since 1988, at first
helping David Trueman, and as the primary maintainer since around 1994.
@@ -39212,7 +39275,7 @@ A description of behaviors in the POSIX standard for
@command{awk} that
are left undefined, or where @command{gawk} may not comply fully, as well
as a list of things that the POSIX standard should describe but does not.
address@hidden artificial address@hidden @command{gawk} and
address@hidden artificial intelligence, @command{gawk} and
@item doc/awkforai.txt
Pointers to the original draft of
a short article describing why @command{gawk} is a good language for
@@ -39493,7 +39556,7 @@ Add the argument to the end of the @env{AWKLIBPATH}
environment variable.
@node Additional Configuration Options
@appendixsubsec Additional Configuration Options
@cindex @command{gawk} @subentry configuring @subentry options
address@hidden configuration address@hidden @command{gawk}
address@hidden configuration options, @command{gawk}
There are several additional options you may use on the @command{configure}
command line when compiling @command{gawk} from scratch, including:
@@ -40360,7 +40423,7 @@ The people maintaining the various @command{gawk} ports
are:
@cindex Malmberg, John
@cindex Pitts, Dave
@cindex G., Daniel Richard
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Arnold
@cindex Zaretskii, Eli
@cindex Guerrero, Juan Manuel
@multitable {MS-Windows with MinGW}
{123456789012345678901234567890123456789001234567890}
@@ -40507,7 +40570,7 @@ since approximately 2001.
@cindex Beebe, Nelson H.F.@:
@cindex @command{pawk} (profiling version of Brian Kernighan's @command{awk})
address@hidden source code @subentry @command{pawk}
address@hidden source code @subentry @command{pawk} (profiling version of Brian
Kernighan's @command{awk})
@item @command{pawk}
Nelson H.F.@: Beebe at the University of Utah has modified
BWK @command{awk} to provide timing and profiling information.
@@ -41287,7 +41350,7 @@ Larry
@end ignore
@cindex Perl
@cindex Wall, Larry
address@hidden Robbins, Arnold
address@hidden Robbins @subentry Arnold
@quotation
@i{AWK is a language similar to PERL, only considerably more elegant.}
@author Arnold Robbins
@@ -41737,7 +41800,7 @@ and even more often, as ``I/O'' for short.
(You will also see ``input'' and ``output'' used as verbs.)
@cindex data-driven languages
address@hidden address@hidden data-driven
address@hidden languages, data-driven
@command{awk} manages the reading of data for you, as well as the
breaking it up into records and fields. Your program's job is to
tell @command{awk} what to do with the data. You do this by describing
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 27 +
ChangeLog.1 | 0
Checklist | 4 +-
Makefile.am | 1 +
Makefile.in | 1 +
POSIX.STD | 12 +-
awk.h | 1 +
awkgram.c | 2 +-
awkgram.y | 2 +-
awklib/ChangeLog | 4 +
awklib/Makefile.am | 3 +-
awklib/Makefile.in | 4 +-
command.c | 14 +-
command.y | 14 +-
doc/ChangeLog | 21 +
doc/Makefile.am | 3 +-
doc/Makefile.in | 3 +-
doc/gawk.info | 1174 +++++++++++++++++++-------------------
doc/gawk.texi | 57 +-
doc/gawktexi.in | 272 ++++++---
doc/it/ChangeLog | 4 +
doc/it/gawktexi.in | 13 +-
extension/ChangeLog | 4 +
extension/Makefile.am | 1 +
extension/Makefile.in | 1 +
field.c | 1 +
interpret.h | 3 +-
main.c | 6 +
msg.c | 9 +-
test/ChangeLog | 11 +
test/Makefile.am | 12 +-
test/Makefile.in | 22 +-
test/Maketests | 10 +
test/fscaret.awk | 8 +
test/{exitval2.ok => fscaret.in} | 0
test/fscaret.ok | 1 +
test/synerr3.awk | 1 +
test/synerr3.ok | 5 +
38 files changed, 1030 insertions(+), 701 deletions(-)
mode change 100755 => 100644 ChangeLog.1
create mode 100644 test/fscaret.awk
copy test/{exitval2.ok => fscaret.in} (100%)
create mode 100644 test/fscaret.ok
create mode 100644 test/synerr3.awk
create mode 100644 test/synerr3.ok
hooks/post-receive
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gawk
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