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[gawk-diffs] [SCM] gawk branch, gawk-4.1-stable, updated. gawk-4.1.0-561
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From: |
Arnold Robbins |
|
Subject: |
[gawk-diffs] [SCM] gawk branch, gawk-4.1-stable, updated. gawk-4.1.0-561-g65f80a8 |
|
Date: |
Fri, 23 Jan 2015 12:06:40 +0000 |
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The branch, gawk-4.1-stable has been updated
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- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=65f80a8ce75f050e30a400ff5eee3c08366bb518
commit 65f80a8ce75f050e30a400ff5eee3c08366bb518
Author: Arnold D. Robbins <address@hidden>
Date: Fri Jan 23 14:06:20 2015 +0200
Add more entries to the glossary.
diff --git a/doc/ChangeLog b/doc/ChangeLog
index d16c7c7..2088bb0 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,6 +1,7 @@
2015-01-23 Arnold D. Robbins <address@hidden>
* gawktexi.in: O'Reilly fixes.
+ (Glossary): Many new entries from Antonio Giovanni Columbo.
2015-01-21 Arnold D. Robbins <address@hidden>
diff --git a/doc/gawk.info b/doc/gawk.info
index 2a17cbc..365ca95 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -29443,6 +29443,21 @@ ANSI
C++ programming languages. These standards often become
international standards as well. See also "ISO."
+Argument
+ An argument can be two different things. It can be an option or a
+ file name passed to a command while invoking it from the command
+ line, or it can be something passed to a "function" inside a
+ program, e.g. inside `awk'.
+
+ In the latter case, an argument can be passed to a function in two
+ ways. Either it is given to the called function by value, i.e., a
+ copy of the value of the variable is made available to the called
+ function, but the original variable cannot be modified by the
+ function itself; or it is given by reference, i.e., a pointer to
+ the interested variable is passed to the function, which can then
+ directly modify it. In `awk' scalars are passed by value, and
+ arrays are passed by reference. See "Pass By Value/Reference."
+
Array
A grouping of multiple values under the same name. Most languages
just provide sequential arrays. `awk' provides associative arrays.
@@ -29478,6 +29493,26 @@ Bash
The GNU version of the standard shell (the Bourne-Again SHell).
See also "Bourne Shell."
+Binary
+ Base-two notation, where the digits are `0'-`1'. Since electronic
+ circuitry works "naturally" in base 2 (just think of Off/On),
+ everything inside a computer is calculated using base 2. Each digit
+ represents the presence (or absence) of a power of 2 and is called
+ a "bit". So, for example, the base-two number `10101' is the same
+ as decimal 21, ((1 x 16) + (1 x 4) + (1 x 1)).
+
+ Since base-two numbers quickly become very long to read and write,
+ they are usually grouped by 3 (i.e., they are read as octal
+ numbers), or by 4 (i.e., they are read as hexadecimal numbers).
+ There is no direct way to insert base 2 numbers in a C program.
+ If need arises, such numbers are usually inserted as octal or
+ hexadecimal numbers. The number of base-two digits that fit into
+ registers used for representing integer numbers in computers is a
+ rough indication of the computing power of the computer itself.
+ Most computers nowadays use 64 bits for representing integer
+ numbers in their registers, but 32-bit, 16-bit and 8-bit registers
+ have been widely used in the past. *Note Nondecimal-numbers::.
+
Bit
Short for "Binary Digit." All values in computer memory
ultimately reduce to binary digits: values that are either zero or
@@ -29506,6 +29541,19 @@ Braces
The characters `{' and `}'. Braces are used in `awk' for
delimiting actions, compound statements, and function bodies.
+Bracket Expression
+ Inside a "regular expression", an expression included in square
+ brackets, meant to designate a single character as belonging to a
+ specified character class. A bracket expression can contain a list
+ of one or more characters, like `[abc]', a range of characters,
+ like `[A-Z]', or a name, delimited by `:', that designates a known
+ set of characters, like `[:digit:]'. The form of bracket expression
+ enclosed between `:' is independent of the underlying
+ representation of the character themselves, which could utilize
+ the ASCII, ECBDIC, or Unicode codesets, depending on the
+ architecture of the computer system, and on localization. See
+ also "Regular Expression."
+
Built-in Function
The `awk' language provides built-in functions that perform various
numerical, I/O-related, and string computations. Examples are
@@ -29533,9 +29581,25 @@ C
In general, `gawk' attempts to be as similar to the 1990 version
of ISO C as makes sense.
+C Shell
+ The C Shell (`csh' or its improved version, `tcsh') is a Unix
+ shell that was created by Bill Joy in the late 1970s. The C shell
+ was differentiated from other shells by its interactive features
+ and overall style, which looks more like C. The C Shell is not
+ backward compatible with the Bourne Shell, so special attention is
+ required when converting scripts written for other Unix shells to
+ the C shell, especially with regard to the management of shell
+ variables. See also "Bourne Shell."
+
C++
A popular object-oriented programming language derived from C.
+Character Class
+ See "Bracket Expression."
+
+Character List
+ See "Bracket Expression."
+
Character Set
The set of numeric codes used by a computer system to represent the
characters (letters, numbers, punctuation, etc.) of a particular
@@ -29563,10 +29627,21 @@ Compiler
machine-executable object code. The object code is then executed
directly by the computer. See also "Interpreter."
+Complemented Bracket Expression
+ The negation of a "bracket expression". All that is _not_
+ described by a given bracket expression. The symbol `^' precedes
+ the negated bracket expression. E.g.: `[[^:digit:]' designates
+ whatever character is not a digit. `[^bad]' designates whatever
+ character is not one of the letters `b', `a', or `d'. See
+ "Bracket Expression."
+
Compound Statement
A series of `awk' statements, enclosed in curly braces. Compound
statements may be nested. (*Note Statements::.)
+Computed Regexps
+ See "Dynamic Regular Expressions."
+
Concatenation
Concatenating two strings means sticking them together, one after
another, producing a new string. For example, the string `foo'
@@ -29580,6 +29655,12 @@ Conditional Expression
otherwise the value is EXPR3. In either case, only one of EXPR2
and EXPR3 is evaluated. (*Note Conditional Exp::.)
+Control Statement
+ A control statement is an instruction to perform a given operation
+ or a set of operations inside an `awk' program, if a given
+ condition is true. Control statements are: `if', `for', `while',
+ and `do' (*note Statements::).
+
Cookie
A peculiar goodie, token, saying or remembrance produced by or
presented to a program. (With thanks to Professor Doug McIlroy.)
@@ -29686,6 +29767,12 @@ Format
are controlled by the format strings contained in the predefined
variables `CONVFMT' and `OFMT'. (*Note Control Letters::.)
+Fortran
+ Shorthand for FORmula TRANslator, one of the first programming
+ languages available for scientific calculations. It was created by
+ John Backus, and has been available since 1957. It is still in use
+ today.
+
Free Documentation License
This document describes the terms under which this Info file is
published and may be copied. (*Note GNU Free Documentation
@@ -29701,9 +29788,16 @@ FSF
See "Free Software Foundation."
Function
- A specialized group of statements used to encapsulate general or
- program-specific tasks. `awk' has a number of built-in functions,
- and also allows you to define your own. (*Note Functions::.)
+ A part of an `awk' program that can be invoked from every point of
+ the program, to perform a task. `awk' has several built-in
+ functions. Users can define their own functions in every part of
+ the program. Function can be recursive, i.e., they may invoke
+ themselves. *Note Functions::. In `gawk' it is also possible to
+ have functions shared among different programs, and included where
+ required using the address@hidden' directive (*note Include Files::).
+ In `gawk' the name of the function that should be invoked can be
+ generated at run time, i.e., dynamically. The `gawk' extension
+ API provides constructor functions (*note Constructor Functions::).
`gawk'
The GNU implementation of `awk'.
@@ -29799,6 +29893,12 @@ Keyword
`else', `exit', `for...in', `for', `function', `func', `if',
`next', `nextfile', `switch', and `while'.
+Korn Shell
+ The Korn Shell (`ksh') is a Unix shell which was developed by
+ David Korn at Bell Laboratories in the early 1980s. The Korn Shell
+ is backward-compatible with the Bourne shell and includes many
+ features of the C shell. See also "Bourne Shell."
+
Lesser General Public License
This document describes the terms under which binary library
archives or shared objects, and their source code may be
@@ -29836,6 +29936,13 @@ Metacharacters
Instead, they denote regular expression operations, such as
repetition, grouping, or alternation.
+Nesting
+ Nesting is where information is organized in layers, or where
+ objects contain other similar objects. In `gawk' the address@hidden'
+ directive can be nested. The "natural" nesting of arithmetic and
+ logical operations can be changed using parentheses (*note
+ Precedence::).
+
No-op
An operation that does nothing.
@@ -29855,6 +29962,11 @@ Octal
are written in C using a leading `0', to indicate their base.
Thus, `013' is 11 ((1 x 8) + 3). *Note Nondecimal-numbers::.
+Output Record
+ A single chunk of data that is written out by `awk'. Usually, an
+ `awk' output record consists of one or more lines of text. *Note
+ Records::.
+
Pattern
Patterns tell `awk' which input records are interesting to which
rules.
@@ -29870,6 +29982,9 @@ PEBKAC
computer usage problems. (Problem Exists Between Keyboard And
Chair.)
+Plug-in
+ See "Extensions."
+
POSIX
The name for a series of standards that specify a Portable
Operating System interface. The "IX" denotes the Unix heritage of
@@ -29893,6 +30008,9 @@ Range (of input lines)
can specify ranges of input lines for `awk' to process or it can
specify single lines. (*Note Pattern Overview::.)
+Record
+ See "Input record" and "Output record."
+
Recursion
When a function calls itself, either directly or indirectly. If
this is clear, stop, and proceed to the next entry. Otherwise,
@@ -29909,6 +30027,16 @@ Redirection
using the `>', `>>', `|', and `|&' operators. (*Note Getline::,
and *note Redirection::.)
+Reference Counts
+ An internal mechanism in `gawk' to minimize the amount of memory
+ needed to store the value of string variables. If the value
+ assumed by a variable is used in more than one place, only one
+ copy of the value itself is kept, and the associated reference
+ count is increased when the same value is used by an additional
+ variable, and decresed when the related variable is no longer in
+ use. When the reference count goes to zero, the memory space used
+ to store the value of the variable is freed.
+
Regexp
See "Regular Expression."
@@ -29927,6 +30055,15 @@ Regular Expression Constant
when you write the `awk' program and cannot be changed during its
execution. (*Note Regexp Usage::.)
+Regular Expression Operators
+ See "Metacharacters."
+
+Rounding
+ Rounding the result of an arithmetic operation can be tricky.
+ More than one way of rounding exists, and in `gawk' it is possible
+ to choose which method should be used in a program. *Note Setting
+ the rounding mode::.
+
Rule
A segment of an `awk' program that specifies how to process single
input records. A rule consists of a "pattern" and an "action".
@@ -29988,6 +30125,11 @@ Special File
handed directly to the underlying operating system--for example,
`/dev/stderr'. (*Note Special Files::.)
+Statement
+ An expression inside an `awk' program in the action part of a
+ pattern-action rule, or inside an `awk' function. A statement can
+ be a variable assignment, an array operation, a loop, etc.
+
Stream Editor
A program that reads records from an input stream and processes
them one or more at a time. This is in contrast with batch
@@ -30030,10 +30172,15 @@ UTC
reference time for day and date calculations. See also "Epoch"
and "GMT."
+Variable
+ A name for a value. In `awk', variables may be either scalars or
+ arrays.
+
Whitespace
A sequence of space, TAB, or newline characters occurring inside
an input record or a string.
+
File: gawk.info, Node: Copying, Next: GNU Free Documentation License, Prev:
Glossary, Up: Top
@@ -31629,7 +31776,7 @@ Index
(line 18)
* artificial intelligence, gawk and: Distribution contents.
(line 52)
-* ASCII <1>: Glossary. (line 133)
+* ASCII <1>: Glossary. (line 197)
* ASCII: Ordinal Functions. (line 45)
* asort <1>: Array Sorting Functions.
(line 6)
@@ -31801,7 +31948,7 @@ Index
* BEGINFILE pattern, Boolean patterns and: Expression Patterns.
(line 69)
* beginfile() user-defined function: Filetrans Function. (line 61)
-* Bentley, Jon: Glossary. (line 143)
+* Bentley, Jon: Glossary. (line 207)
* Benzinger, Michael: Contributors. (line 97)
* Berry, Karl <1>: Ranges and Locales. (line 74)
* Berry, Karl: Acknowledgments. (line 33)
@@ -31883,7 +32030,7 @@ Index
* Brink, Jeroen: DOS Quoting. (line 10)
* Broder, Alan J.: Contributors. (line 88)
* Brown, Martin: Contributors. (line 82)
-* BSD-based operating systems: Glossary. (line 611)
+* BSD-based operating systems: Glossary. (line 753)
* bt debugger command (alias for backtrace): Execution Stack. (line 13)
* Buening, Andreas <1>: Bugs. (line 70)
* Buening, Andreas <2>: Contributors. (line 92)
@@ -31925,7 +32072,7 @@ Index
(line 56)
* character lists in regular expression: Bracket Expressions. (line 6)
* character lists, See bracket expressions: Regexp Operators. (line 56)
-* character sets (machine character encodings) <1>: Glossary. (line 133)
+* character sets (machine character encodings) <1>: Glossary. (line 197)
* character sets (machine character encodings): Ordinal Functions.
(line 45)
* character sets, See Also bracket expressions: Regexp Operators.
@@ -31936,7 +32083,7 @@ Index
* Chassell, Robert J.: Acknowledgments. (line 33)
* chdir() extension function: Extension Sample File Functions.
(line 12)
-* chem utility: Glossary. (line 143)
+* chem utility: Glossary. (line 207)
* chr() extension function: Extension Sample Ord.
(line 15)
* chr() user-defined function: Ordinal Functions. (line 16)
@@ -32013,7 +32160,7 @@ Index
* compatibility mode (gawk), octal numbers: Nondecimal-numbers.
(line 60)
* compatibility mode (gawk), specifying: Options. (line 81)
-* compiled programs <1>: Glossary. (line 155)
+* compiled programs <1>: Glossary. (line 219)
* compiled programs: Basic High Level. (line 15)
* compiling gawk for Cygwin: Cygwin. (line 6)
* compiling gawk for MS-DOS and MS-Windows: PC Compiling. (line 13)
@@ -32059,7 +32206,7 @@ Index
* CONVFMT variable: Strings And Numbers. (line 29)
* CONVFMT variable, and array subscripts: Numeric Array Subscripts.
(line 6)
-* cookie: Glossary. (line 177)
+* cookie: Glossary. (line 258)
* coprocesses <1>: Two-way I/O. (line 25)
* coprocesses: Redirection. (line 96)
* coprocesses, closing: Close Files And Pipes.
@@ -32083,7 +32230,7 @@ Index
* cut.awk program: Cut Program. (line 45)
* d debugger command (alias for delete): Breakpoint Control. (line 64)
* d.c., See dark corner: Conventions. (line 42)
-* dark corner <1>: Glossary. (line 188)
+* dark corner <1>: Glossary. (line 269)
* dark corner: Conventions. (line 42)
* dark corner, "0" is actually true: Truth Values. (line 24)
* dark corner, /= operator vs. /=.../ regexp constant: Assignment Ops.
@@ -32429,7 +32576,7 @@ Index
* environment variables used by gawk: Environment Variables.
(line 6)
* environment variables, in ENVIRON array: Auto-set. (line 60)
-* epoch, definition of: Glossary. (line 234)
+* epoch, definition of: Glossary. (line 315)
* equals sign (=), = operator: Assignment Ops. (line 6)
* equals sign (=), == operator <1>: Precedence. (line 65)
* equals sign (=), == operator: Comparison Operators.
@@ -32675,10 +32822,10 @@ Index
* frame debugger command: Execution Stack. (line 27)
* Free Documentation License (FDL): GNU Free Documentation License.
(line 7)
-* Free Software Foundation (FSF) <1>: Glossary. (line 288)
+* Free Software Foundation (FSF) <1>: Glossary. (line 375)
* Free Software Foundation (FSF) <2>: Getting. (line 10)
* Free Software Foundation (FSF): Manual History. (line 6)
-* FreeBSD: Glossary. (line 611)
+* FreeBSD: Glossary. (line 753)
* FS variable <1>: User-modified. (line 50)
* FS variable: Field Separators. (line 15)
* FS variable, --field-separator option and: Options. (line 21)
@@ -32692,7 +32839,7 @@ Index
* FS, containing ^: Regexp Field Splitting.
(line 59)
* FS, in multiline records: Multiple Line. (line 41)
-* FSF (Free Software Foundation) <1>: Glossary. (line 288)
+* FSF (Free Software Foundation) <1>: Glossary. (line 375)
* FSF (Free Software Foundation) <2>: Getting. (line 10)
* FSF (Free Software Foundation): Manual History. (line 6)
* fts() extension function: Extension Sample File Functions.
@@ -32839,7 +32986,7 @@ Index
(line 63)
* gawkextlib: gawkextlib. (line 6)
* gawkextlib project: gawkextlib. (line 6)
-* General Public License (GPL): Glossary. (line 305)
+* General Public License (GPL): Glossary. (line 399)
* General Public License, See GPL: Manual History. (line 11)
* generate time values: Time Functions. (line 25)
* gensub <1>: String Functions. (line 90)
@@ -32897,18 +33044,18 @@ Index
* GNU awk, See gawk: Preface. (line 51)
* GNU Free Documentation License: GNU Free Documentation License.
(line 7)
-* GNU General Public License: Glossary. (line 305)
-* GNU Lesser General Public License: Glossary. (line 396)
+* GNU General Public License: Glossary. (line 399)
+* GNU Lesser General Public License: Glossary. (line 496)
* GNU long options <1>: Options. (line 6)
* GNU long options: Command Line. (line 13)
* GNU long options, printing list of: Options. (line 154)
-* GNU Project <1>: Glossary. (line 314)
+* GNU Project <1>: Glossary. (line 408)
* GNU Project: Manual History. (line 11)
-* GNU/Linux <1>: Glossary. (line 611)
+* GNU/Linux <1>: Glossary. (line 753)
* GNU/Linux <2>: I18N Example. (line 55)
* GNU/Linux: Manual History. (line 28)
* Gordon, Assaf: Contributors. (line 105)
-* GPL (General Public License) <1>: Glossary. (line 305)
+* GPL (General Public License) <1>: Glossary. (line 399)
* GPL (General Public License): Manual History. (line 11)
* GPL (General Public License), printing: Options. (line 88)
* grcat program: Group Functions. (line 16)
@@ -33040,20 +33187,20 @@ Index
* internationalization, localization, portability and: I18N Portability.
(line 6)
* internationalizing a program: Explaining gettext. (line 6)
-* interpreted programs <1>: Glossary. (line 356)
+* interpreted programs <1>: Glossary. (line 450)
* interpreted programs: Basic High Level. (line 15)
* interval expressions, regexp operator: Regexp Operators. (line 116)
* inventory-shipped file: Sample Data Files. (line 32)
* invoke shell command: I/O Functions. (line 106)
* isarray: Type Functions. (line 11)
-* ISO: Glossary. (line 367)
-* ISO 8859-1: Glossary. (line 133)
-* ISO Latin-1: Glossary. (line 133)
+* ISO: Glossary. (line 461)
+* ISO 8859-1: Glossary. (line 197)
+* ISO Latin-1: Glossary. (line 197)
* Jacobs, Andrew: Passwd Functions. (line 90)
* Jaegermann, Michal <1>: Contributors. (line 45)
* Jaegermann, Michal: Acknowledgments. (line 60)
* Java implementation of awk: Other Versions. (line 117)
-* Java programming language: Glossary. (line 379)
+* Java programming language: Glossary. (line 473)
* jawk: Other Versions. (line 117)
* Jedi knights: Undocumented. (line 6)
* Johansen, Chris: Signature Program. (line 25)
@@ -33062,7 +33209,7 @@ Index
* Kahrs, Ju"rgen: Acknowledgments. (line 60)
* Kasal, Stepan: Acknowledgments. (line 60)
* Kenobi, Obi-Wan: Undocumented. (line 6)
-* Kernighan, Brian <1>: Glossary. (line 143)
+* Kernighan, Brian <1>: Glossary. (line 207)
* Kernighan, Brian <2>: Basic Data Typing. (line 54)
* Kernighan, Brian <3>: Other Versions. (line 13)
* Kernighan, Brian <4>: Contributors. (line 11)
@@ -33103,8 +33250,8 @@ Index
* length: String Functions. (line 171)
* length of input record: String Functions. (line 178)
* length of string: String Functions. (line 171)
-* Lesser General Public License (LGPL): Glossary. (line 396)
-* LGPL (Lesser General Public License): Glossary. (line 396)
+* Lesser General Public License (LGPL): Glossary. (line 496)
+* LGPL (Lesser General Public License): Glossary. (line 496)
* libmawk: Other Versions. (line 125)
* libraries of awk functions: Library Functions. (line 6)
* libraries of awk functions, assertions: Assert Function. (line 6)
@@ -33149,7 +33296,7 @@ Index
* lint checking, undefined functions: Pass By Value/Reference.
(line 85)
* LINT variable: User-modified. (line 88)
-* Linux <1>: Glossary. (line 611)
+* Linux <1>: Glossary. (line 753)
* Linux <2>: I18N Example. (line 55)
* Linux: Manual History. (line 28)
* list all global variables, in debugger: Debugger Info. (line 48)
@@ -33211,7 +33358,7 @@ Index
* mawk utility <4>: Getline/Pipe. (line 62)
* mawk utility: Escape Sequences. (line 117)
* maximum precision supported by MPFR library: Auto-set. (line 221)
-* McIlroy, Doug: Glossary. (line 177)
+* McIlroy, Doug: Glossary. (line 258)
* McPhee, Patrick: Contributors. (line 100)
* message object files: Explaining gettext. (line 42)
* message object files, converting from portable object files: I18N Example.
@@ -33239,7 +33386,7 @@ Index
* names, functions: Definition Syntax. (line 23)
* namespace issues: Library Names. (line 6)
* namespace issues, functions: Definition Syntax. (line 23)
-* NetBSD: Glossary. (line 611)
+* NetBSD: Glossary. (line 753)
* networks, programming: TCP/IP Networking. (line 6)
* networks, support for: Special Network. (line 6)
* newlines <1>: Boolean Ops. (line 69)
@@ -33327,7 +33474,7 @@ Index
* OFS variable <1>: User-modified. (line 113)
* OFS variable <2>: Output Separators. (line 6)
* OFS variable: Changing Fields. (line 64)
-* OpenBSD: Glossary. (line 611)
+* OpenBSD: Glossary. (line 753)
* OpenSolaris: Other Versions. (line 100)
* operating systems, BSD-based: Manual History. (line 28)
* operating systems, PC, gawk on: PC Using. (line 6)
@@ -33600,7 +33747,7 @@ Index
* programming languages, Ada: Glossary. (line 11)
* programming languages, data-driven vs. procedural: Getting Started.
(line 12)
-* programming languages, Java: Glossary. (line 379)
+* programming languages, Java: Glossary. (line 473)
* programming, basic steps: Basic High Level. (line 20)
* programming, concepts: Basic Concepts. (line 6)
* pwcat program: Passwd Functions. (line 23)
@@ -33962,7 +34109,7 @@ Index
* square root: Numeric Functions. (line 77)
* srand: Numeric Functions. (line 81)
* stack frame: Debugging Terms. (line 10)
-* Stallman, Richard <1>: Glossary. (line 288)
+* Stallman, Richard <1>: Glossary. (line 375)
* Stallman, Richard <2>: Contributors. (line 23)
* Stallman, Richard <3>: Acknowledgments. (line 18)
* Stallman, Richard: Manual History. (line 6)
@@ -34147,14 +34294,14 @@ Index
* undisplay debugger command: Viewing And Changing Data.
(line 80)
* undocumented features: Undocumented. (line 6)
-* Unicode <1>: Glossary. (line 133)
+* Unicode <1>: Glossary. (line 197)
* Unicode <2>: Ranges and Locales. (line 61)
* Unicode: Ordinal Functions. (line 45)
* uninitialized variables, as array subscripts: Uninitialized Subscripts.
(line 6)
* uniq utility: Uniq Program. (line 6)
* uniq.awk program: Uniq Program. (line 65)
-* Unix: Glossary. (line 611)
+* Unix: Glossary. (line 753)
* Unix awk, backslashes in escape sequences: Escape Sequences.
(line 117)
* Unix awk, close() function and: Close Files And Pipes.
@@ -34854,8 +35001,8 @@ Ref: figure-process-flow1177224
Ref: Basic High Level-Footnote-11180453
Node: Basic Data Typing1180638
Node: Glossary1183966
-Node: Copying1209124
-Node: GNU Free Documentation License1246680
-Node: Index1271816
+Node: Copying1215912
+Node: GNU Free Documentation License1253468
+Node: Index1278604
End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index b2837f3..c6fb037 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -39610,6 +39610,21 @@ languages.
These standards often become international standards as well. See also
``ISO.''
address@hidden Argument
+An argument can be two different things. It can be an option or a
address@hidden passed to a command while invoking it from the command line, or
+it can be something passed to a @dfn{function} inside a program, e.g.
+inside @command{awk}.
+
+In the latter case, an argument can be passed to a function in two ways.
+Either it is given to the called function by value, i.e., a copy of the
+value of the variable is made available to the called function, but the
+original variable cannot be modified by the function itself; or it is
+given by reference, i.e., a pointer to the interested variable is passed to
+the function, which can then directly modify it. In @command{awk}
+scalars are passed by value, and arrays are passed by reference.
+See ``Pass By Value/Reference.''
+
@item Array
A grouping of multiple values under the same name.
Most languages just provide sequential arrays.
@@ -39651,6 +39666,25 @@ The GNU version of the standard shell
@end ifinfo
See also ``Bourne Shell.''
address@hidden Binary
+Base-two notation, where the digits are @address@hidden Since
+electronic circuitry works ``naturally'' in base 2 (just think of Off/On),
+everything inside a computer is calculated using base 2. Each digit
+represents the presence (or absence) of a power of 2 and is called a
address@hidden So, for example, the base-two number @code{10101} is
+the same as decimal 21, ((1 x 16) + (1 x 4) + (1 x 1)).
+
+Since base-two numbers quickly become
+very long to read and write, they are usually grouped by 3 (i.e., they are
+read as octal numbers), or by 4 (i.e., they are read as hexadecimal
+numbers). There is no direct way to insert base 2 numbers in a C program.
+If need arises, such numbers are usually inserted as octal or hexadecimal
+numbers. The number of base-two digits that fit into registers used for
+representing integer numbers in computers is a rough indication of the
+computing power of the computer itself. Most computers nowadays use 64
+bits for representing integer numbers in their registers, but 32-bit,
+16-bit and 8-bit registers have been widely used in the past.
address@hidden
@item Bit
Short for ``Binary Digit.''
All values in computer memory ultimately reduce to binary digits: values
@@ -39682,6 +39716,19 @@ The characters @address@hidden and @address@hidden
Braces are used in
@command{awk} for delimiting actions, compound statements, and function
bodies.
address@hidden Bracket Expression
+Inside a @dfn{regular expression}, an expression included in square
+brackets, meant to designate a single character as belonging to a
+specified character class. A bracket expression can contain a list of one
+or more characters, like @samp{[abc]}, a range of characters, like
address@hidden, or a name, delimited by @samp{:}, that designates a known set
+of characters, like @samp{[:digit:]}. The form of bracket expression
+enclosed between @samp{:} is independent of the underlying representation
+of the character themselves, which could utilize the ASCII, ECBDIC, or
+Unicode codesets, depending on the architecture of the computer system, and on
+localization.
+See also ``Regular Expression.''
+
@item Built-in Function
The @command{awk} language provides built-in functions that perform various
numerical, I/O-related, and string computations. Examples are
@@ -39735,9 +39782,25 @@ points out similarities between @command{awk} and C
when appropriate.
In general, @command{gawk} attempts to be as similar to the 1990 version
of ISO C as makes sense.
address@hidden C Shell
+The C Shell (@command{csh} or its improved version, @command{tcsh}) is a Unix
shell that was
+created by Bill Joy in the late 1970s. The C shell was differentiated from
+other shells by its interactive features and overall style, which
+looks more like C. The C Shell is not backward compatible with the Bourne
+Shell, so special attention is required when converting scripts
+written for other Unix shells to the C shell, especially with regard to the
management of
+shell variables.
+See also ``Bourne Shell.''
+
@item C++
A popular object-oriented programming language derived from C.
address@hidden Character Class
+See ``Bracket Expression.''
+
address@hidden Character List
+See ``Bracket Expression.''
+
@cindex ASCII
@cindex ISO 8859-1
@cindex ISO Latin-1
@@ -39777,11 +39840,23 @@ machine-executable object code. The object code is
then executed
directly by the computer.
See also ``Interpreter.''
address@hidden Complemented Bracket Expression
+The negation of a @dfn{bracket expression}. All that is @emph{not}
+described by a given bracket expression. The symbol @samp{^} precedes
+the negated bracket expression. E.g.: @samp{[[^:digit:]}
+designates whatever character is not a digit. @samp{[^bad]}
+designates whatever character is not one of the letters @samp{b}, @samp{a},
+or @samp{d}.
+See ``Bracket Expression.''
+
@item Compound Statement
A series of @command{awk} statements, enclosed in curly braces. Compound
statements may be nested.
(@xref{Statements}.)
address@hidden Computed Regexps
+See ``Dynamic Regular Expressions.''
+
@item Concatenation
Concatenating two strings means sticking them together, one after another,
producing a new string. For example, the string @samp{foo} concatenated with
@@ -39796,6 +39871,13 @@ expression is the value of @var{expr2}; otherwise the
value is
@var{expr3}. In either case, only one of @var{expr2} and @var{expr3}
is evaluated. (@xref{Conditional Exp}.)
address@hidden Control Statement
+A control statement is an instruction to perform a given operation or a set
+of operations inside an @command{awk} program, if a given condition is
+true. Control statements are: @code{if}, @code{for}, @code{while}, and
address@hidden
+(@pxref{Statements}).
+
@cindex McIlroy, Doug
@cindex cookie
@item Cookie
@@ -39950,6 +40032,11 @@ Format strings control the appearance of output in the
are controlled by the format strings contained in the predefined variables
@code{CONVFMT} and @code{OFMT}. (@xref{Control Letters}.)
address@hidden Fortran
+Shorthand for FORmula TRANslator, one of the first programming languages
+available for scientific calculations. It was created by John Backus,
+and has been available since 1957. It is still in use today.
+
@item Free Documentation License
This document describes the terms under which this @value{DOCUMENT}
is published and may be copied. (@xref{GNU Free Documentation License}.)
@@ -39967,10 +40054,21 @@ Emacs editor. GNU Emacs is the most widely used
version of Emacs today.
See ``Free Software Foundation.''
@item Function
-A specialized group of statements used to encapsulate general
-or program-specific tasks. @command{awk} has a number of built-in
-functions, and also allows you to define your own.
-(@xref{Functions}.)
+A part of an @command{awk} program that can be invoked from every point of
+the program, to perform a task. @command{awk} has several built-in
+functions.
+Users can define their own functions in every part of the program.
+Function can be recursive, i.e., they may invoke themselves.
address@hidden
+In @command{gawk} it is also possible to have functions shared
+among different programs, and included where required using the
address@hidden@@include} directive
+(@pxref{Include Files}).
+In @command{gawk} the name of the function that should be invoked
+can be generated at run time, i.e., dynamically.
+The @command{gawk} extension API provides constructor functions
+(@pxref{Constructor Functions}).
+
@item @command{gawk}
The GNU implementation of @command{awk}.
@@ -40094,6 +40192,12 @@ meaning. Keywords are reserved and may not be used as
variable names.
and
@code{while}.
address@hidden Korn Shell
+The Korn Shell (@command{ksh}) is a Unix shell which was developed by David
Korn at Bell
+Laboratories in the early 1980s. The Korn Shell is backward-compatible with
the Bourne
+shell and includes many features of the C shell.
+See also ``Bourne Shell.''
+
@cindex LGPL (Lesser General Public License)
@cindex Lesser General Public License (LGPL)
@cindex GNU Lesser General Public License
@@ -40133,6 +40237,14 @@ Characters used within a regexp that do not stand for
themselves.
Instead, they denote regular expression operations, such as repetition,
grouping, or alternation.
address@hidden Nesting
+Nesting is where information is organized in layers, or where objects
+contain other similar objects.
+In @command{gawk} the @code{@@include}
+directive can be nested. The ``natural'' nesting of arithmetic and
+logical operations can be changed using parentheses
+(@pxref{Precedence}).
+
@item No-op
An operation that does nothing.
@@ -40153,6 +40265,11 @@ Octal numbers are written in C using a leading
@samp{0},
to indicate their base. Thus, @code{013} is 11 ((1 x 8) + 3).
@xref{Nondecimal-numbers}.
address@hidden Output Record
+A single chunk of data that is written out by @command{awk}. Usually, an
address@hidden output record consists of one or more lines of text.
address@hidden
+
@item Pattern
Patterns tell @command{awk} which input records are interesting to which
rules.
@@ -40167,6 +40284,9 @@ An acronym describing what is possibly the most frequent
source of computer usage problems. (Problem Exists Between
Keyboard And Chair.)
address@hidden Plug-in
+See ``Extensions.''
+
@item POSIX
The name for a series of standards
that specify a Portable Operating System interface. The ``IX'' denotes
@@ -40191,6 +40311,9 @@ A sequence of consecutive lines from the input file(s).
A pattern
can specify ranges of input lines for @command{awk} to process or it can
specify single lines. (@xref{Pattern Overview}.)
address@hidden Record
+See ``Input record'' and ``Output record.''
+
@item Recursion
When a function calls itself, either directly or indirectly.
If this is clear, stop, and proceed to the next entry.
@@ -40208,6 +40331,15 @@ operators.
(@xref{Getline},
and @ref{Redirection}.)
address@hidden Reference Counts
+An internal mechanism in @command{gawk} to minimize the amount of memory
+needed to store the value of string variables. If the value assumed by
+a variable is used in more than one place, only one copy of the value
+itself is kept, and the associated reference count is increased when the
+same value is used by an additional variable, and decresed when the related
+variable is no longer in use. When the reference count goes to zero,
+the memory space used to store the value of the variable is freed.
+
@item Regexp
See ``Regular Expression.''
@@ -40225,6 +40357,15 @@ slashes, such as @code{/foo/}. This regular
expression is chosen
when you write the @command{awk} program and cannot be changed during
its execution. (@xref{Regexp Usage}.)
address@hidden Regular Expression Operators
+See ``Metacharacters.''
+
address@hidden Rounding
+Rounding the result of an arithmetic operation can be tricky.
+More than one way of rounding exists, and in @command{gawk}
+it is possible to choose which method should be used in a program.
address@hidden the rounding mode}.
+
@item Rule
A segment of an @command{awk} program that specifies how to process single
input records. A rule consists of a @dfn{pattern} and an @dfn{action}.
@@ -40284,6 +40425,12 @@ A @value{FN} interpreted internally by @command{gawk},
instead of being handed
directly to the underlying operating system---for example, @file{/dev/stderr}.
(@xref{Special Files}.)
address@hidden Statement
+An expression inside an @command{awk} program in the action part
+of a pattern--action rule, or inside an
address@hidden function. A statement can be a variable assignment,
+an array operation, a loop, etc.
+
@item Stream Editor
A program that reads records from an input stream and processes them one
or more at a time. This is in contrast with batch programs, which may
@@ -40334,9 +40481,14 @@ This is standard time in Greenwich, England, which is
used as a
reference time for day and date calculations.
See also ``Epoch'' and ``GMT.''
address@hidden Variable
+A name for a value. In @command{awk}, variables may be either scalars
+or arrays.
+
@item Whitespace
A sequence of space, TAB, or newline characters occurring inside an input
record or a string.
+
@end table
@end ifclear
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index ade6466..e360a83 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -38702,6 +38702,21 @@ languages.
These standards often become international standards as well. See also
``ISO.''
address@hidden Argument
+An argument can be two different things. It can be an option or a
address@hidden passed to a command while invoking it from the command line, or
+it can be something passed to a @dfn{function} inside a program, e.g.
+inside @command{awk}.
+
+In the latter case, an argument can be passed to a function in two ways.
+Either it is given to the called function by value, i.e., a copy of the
+value of the variable is made available to the called function, but the
+original variable cannot be modified by the function itself; or it is
+given by reference, i.e., a pointer to the interested variable is passed to
+the function, which can then directly modify it. In @command{awk}
+scalars are passed by value, and arrays are passed by reference.
+See ``Pass By Value/Reference.''
+
@item Array
A grouping of multiple values under the same name.
Most languages just provide sequential arrays.
@@ -38743,6 +38758,25 @@ The GNU version of the standard shell
@end ifinfo
See also ``Bourne Shell.''
address@hidden Binary
+Base-two notation, where the digits are @address@hidden Since
+electronic circuitry works ``naturally'' in base 2 (just think of Off/On),
+everything inside a computer is calculated using base 2. Each digit
+represents the presence (or absence) of a power of 2 and is called a
address@hidden So, for example, the base-two number @code{10101} is
+the same as decimal 21, ((1 x 16) + (1 x 4) + (1 x 1)).
+
+Since base-two numbers quickly become
+very long to read and write, they are usually grouped by 3 (i.e., they are
+read as octal numbers), or by 4 (i.e., they are read as hexadecimal
+numbers). There is no direct way to insert base 2 numbers in a C program.
+If need arises, such numbers are usually inserted as octal or hexadecimal
+numbers. The number of base-two digits that fit into registers used for
+representing integer numbers in computers is a rough indication of the
+computing power of the computer itself. Most computers nowadays use 64
+bits for representing integer numbers in their registers, but 32-bit,
+16-bit and 8-bit registers have been widely used in the past.
address@hidden
@item Bit
Short for ``Binary Digit.''
All values in computer memory ultimately reduce to binary digits: values
@@ -38774,6 +38808,19 @@ The characters @address@hidden and @address@hidden
Braces are used in
@command{awk} for delimiting actions, compound statements, and function
bodies.
address@hidden Bracket Expression
+Inside a @dfn{regular expression}, an expression included in square
+brackets, meant to designate a single character as belonging to a
+specified character class. A bracket expression can contain a list of one
+or more characters, like @samp{[abc]}, a range of characters, like
address@hidden, or a name, delimited by @samp{:}, that designates a known set
+of characters, like @samp{[:digit:]}. The form of bracket expression
+enclosed between @samp{:} is independent of the underlying representation
+of the character themselves, which could utilize the ASCII, ECBDIC, or
+Unicode codesets, depending on the architecture of the computer system, and on
+localization.
+See also ``Regular Expression.''
+
@item Built-in Function
The @command{awk} language provides built-in functions that perform various
numerical, I/O-related, and string computations. Examples are
@@ -38827,9 +38874,25 @@ points out similarities between @command{awk} and C
when appropriate.
In general, @command{gawk} attempts to be as similar to the 1990 version
of ISO C as makes sense.
address@hidden C Shell
+The C Shell (@command{csh} or its improved version, @command{tcsh}) is a Unix
shell that was
+created by Bill Joy in the late 1970s. The C shell was differentiated from
+other shells by its interactive features and overall style, which
+looks more like C. The C Shell is not backward compatible with the Bourne
+Shell, so special attention is required when converting scripts
+written for other Unix shells to the C shell, especially with regard to the
management of
+shell variables.
+See also ``Bourne Shell.''
+
@item C++
A popular object-oriented programming language derived from C.
address@hidden Character Class
+See ``Bracket Expression.''
+
address@hidden Character List
+See ``Bracket Expression.''
+
@cindex ASCII
@cindex ISO 8859-1
@cindex ISO Latin-1
@@ -38869,11 +38932,23 @@ machine-executable object code. The object code is
then executed
directly by the computer.
See also ``Interpreter.''
address@hidden Complemented Bracket Expression
+The negation of a @dfn{bracket expression}. All that is @emph{not}
+described by a given bracket expression. The symbol @samp{^} precedes
+the negated bracket expression. E.g.: @samp{[[^:digit:]}
+designates whatever character is not a digit. @samp{[^bad]}
+designates whatever character is not one of the letters @samp{b}, @samp{a},
+or @samp{d}.
+See ``Bracket Expression.''
+
@item Compound Statement
A series of @command{awk} statements, enclosed in curly braces. Compound
statements may be nested.
(@xref{Statements}.)
address@hidden Computed Regexps
+See ``Dynamic Regular Expressions.''
+
@item Concatenation
Concatenating two strings means sticking them together, one after another,
producing a new string. For example, the string @samp{foo} concatenated with
@@ -38888,6 +38963,13 @@ expression is the value of @var{expr2}; otherwise the
value is
@var{expr3}. In either case, only one of @var{expr2} and @var{expr3}
is evaluated. (@xref{Conditional Exp}.)
address@hidden Control Statement
+A control statement is an instruction to perform a given operation or a set
+of operations inside an @command{awk} program, if a given condition is
+true. Control statements are: @code{if}, @code{for}, @code{while}, and
address@hidden
+(@pxref{Statements}).
+
@cindex McIlroy, Doug
@cindex cookie
@item Cookie
@@ -39042,6 +39124,11 @@ Format strings control the appearance of output in the
are controlled by the format strings contained in the predefined variables
@code{CONVFMT} and @code{OFMT}. (@xref{Control Letters}.)
address@hidden Fortran
+Shorthand for FORmula TRANslator, one of the first programming languages
+available for scientific calculations. It was created by John Backus,
+and has been available since 1957. It is still in use today.
+
@item Free Documentation License
This document describes the terms under which this @value{DOCUMENT}
is published and may be copied. (@xref{GNU Free Documentation License}.)
@@ -39059,10 +39146,21 @@ Emacs editor. GNU Emacs is the most widely used
version of Emacs today.
See ``Free Software Foundation.''
@item Function
-A specialized group of statements used to encapsulate general
-or program-specific tasks. @command{awk} has a number of built-in
-functions, and also allows you to define your own.
-(@xref{Functions}.)
+A part of an @command{awk} program that can be invoked from every point of
+the program, to perform a task. @command{awk} has several built-in
+functions.
+Users can define their own functions in every part of the program.
+Function can be recursive, i.e., they may invoke themselves.
address@hidden
+In @command{gawk} it is also possible to have functions shared
+among different programs, and included where required using the
address@hidden@@include} directive
+(@pxref{Include Files}).
+In @command{gawk} the name of the function that should be invoked
+can be generated at run time, i.e., dynamically.
+The @command{gawk} extension API provides constructor functions
+(@pxref{Constructor Functions}).
+
@item @command{gawk}
The GNU implementation of @command{awk}.
@@ -39186,6 +39284,12 @@ meaning. Keywords are reserved and may not be used as
variable names.
and
@code{while}.
address@hidden Korn Shell
+The Korn Shell (@command{ksh}) is a Unix shell which was developed by David
Korn at Bell
+Laboratories in the early 1980s. The Korn Shell is backward-compatible with
the Bourne
+shell and includes many features of the C shell.
+See also ``Bourne Shell.''
+
@cindex LGPL (Lesser General Public License)
@cindex Lesser General Public License (LGPL)
@cindex GNU Lesser General Public License
@@ -39225,6 +39329,14 @@ Characters used within a regexp that do not stand for
themselves.
Instead, they denote regular expression operations, such as repetition,
grouping, or alternation.
address@hidden Nesting
+Nesting is where information is organized in layers, or where objects
+contain other similar objects.
+In @command{gawk} the @code{@@include}
+directive can be nested. The ``natural'' nesting of arithmetic and
+logical operations can be changed using parentheses
+(@pxref{Precedence}).
+
@item No-op
An operation that does nothing.
@@ -39245,6 +39357,11 @@ Octal numbers are written in C using a leading
@samp{0},
to indicate their base. Thus, @code{013} is 11 ((1 x 8) + 3).
@xref{Nondecimal-numbers}.
address@hidden Output Record
+A single chunk of data that is written out by @command{awk}. Usually, an
address@hidden output record consists of one or more lines of text.
address@hidden
+
@item Pattern
Patterns tell @command{awk} which input records are interesting to which
rules.
@@ -39259,6 +39376,9 @@ An acronym describing what is possibly the most frequent
source of computer usage problems. (Problem Exists Between
Keyboard And Chair.)
address@hidden Plug-in
+See ``Extensions.''
+
@item POSIX
The name for a series of standards
that specify a Portable Operating System interface. The ``IX'' denotes
@@ -39283,6 +39403,9 @@ A sequence of consecutive lines from the input file(s).
A pattern
can specify ranges of input lines for @command{awk} to process or it can
specify single lines. (@xref{Pattern Overview}.)
address@hidden Record
+See ``Input record'' and ``Output record.''
+
@item Recursion
When a function calls itself, either directly or indirectly.
If this is clear, stop, and proceed to the next entry.
@@ -39300,6 +39423,15 @@ operators.
(@xref{Getline},
and @ref{Redirection}.)
address@hidden Reference Counts
+An internal mechanism in @command{gawk} to minimize the amount of memory
+needed to store the value of string variables. If the value assumed by
+a variable is used in more than one place, only one copy of the value
+itself is kept, and the associated reference count is increased when the
+same value is used by an additional variable, and decresed when the related
+variable is no longer in use. When the reference count goes to zero,
+the memory space used to store the value of the variable is freed.
+
@item Regexp
See ``Regular Expression.''
@@ -39317,6 +39449,15 @@ slashes, such as @code{/foo/}. This regular
expression is chosen
when you write the @command{awk} program and cannot be changed during
its execution. (@xref{Regexp Usage}.)
address@hidden Regular Expression Operators
+See ``Metacharacters.''
+
address@hidden Rounding
+Rounding the result of an arithmetic operation can be tricky.
+More than one way of rounding exists, and in @command{gawk}
+it is possible to choose which method should be used in a program.
address@hidden the rounding mode}.
+
@item Rule
A segment of an @command{awk} program that specifies how to process single
input records. A rule consists of a @dfn{pattern} and an @dfn{action}.
@@ -39376,6 +39517,12 @@ A @value{FN} interpreted internally by @command{gawk},
instead of being handed
directly to the underlying operating system---for example, @file{/dev/stderr}.
(@xref{Special Files}.)
address@hidden Statement
+An expression inside an @command{awk} program in the action part
+of a pattern--action rule, or inside an
address@hidden function. A statement can be a variable assignment,
+an array operation, a loop, etc.
+
@item Stream Editor
A program that reads records from an input stream and processes them one
or more at a time. This is in contrast with batch programs, which may
@@ -39426,9 +39573,14 @@ This is standard time in Greenwich, England, which is
used as a
reference time for day and date calculations.
See also ``Epoch'' and ``GMT.''
address@hidden Variable
+A name for a value. In @command{awk}, variables may be either scalars
+or arrays.
+
@item Whitespace
A sequence of space, TAB, or newline characters occurring inside an input
record or a string.
+
@end table
@end ifclear
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=27522378506a1102a77a15d6db3b6682003f0c99
commit 27522378506a1102a77a15d6db3b6682003f0c99
Author: Arnold D. Robbins <address@hidden>
Date: Fri Jan 23 13:58:57 2015 +0200
Minor doc edit.
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 175c7af..b2837f3 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -9433,7 +9433,7 @@ messages at runtime.
which describes how and why to use positional specifiers.
For now, we ignore them.
address@hidden - (Minus)
address@hidden - @r{(Minus)}
The minus sign, used before the width modifier (see later on in
this list),
says to left-justify
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index f112b35..ade6466 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -9033,7 +9033,7 @@ messages at runtime.
which describes how and why to use positional specifiers.
For now, we ignore them.
address@hidden - (Minus)
address@hidden - @r{(Minus)}
The minus sign, used before the width modifier (see later on in
this list),
says to left-justify
-----------------------------------------------------------------------
Summary of changes:
doc/ChangeLog | 1 +
doc/gawk.info | 227 +++++++++++++++++++++++++++++++++++++++++++++----------
doc/gawk.texi | 162 ++++++++++++++++++++++++++++++++++++++-
doc/gawktexi.in | 162 ++++++++++++++++++++++++++++++++++++++-
4 files changed, 502 insertions(+), 50 deletions(-)
hooks/post-receive
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