Merge branch 'master' into wasted-byte

1 files changed, 501 insertions, 490 deletions

diff --git a/doc/gawk.info b/doc/gawk.info
index d0312ec6..685df45b 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -6005,11 +6005,11 @@ Auto-set::):
 
      PROCINFO["INPUT_NAME", "RETRY"] = 1
 
-   When this element exists, `gawk' checks the value of the system
-`errno' variable when an I/O error occurs.  If `errno' indicates a
-subsequent I/O attempt may succeed, `getline' instead returns -2 and
-further calls to `getline' may succeed.  This applies to the `errno'
-values `EAGAIN', `EWOULDBLOCK', `EINTR', or `ETIMEDOUT'.
+   When this element exists, `gawk' checks the value of the system (C
+language) `errno' variable when an I/O error occurs.  If `errno'
+indicates a subsequent I/O attempt may succeed, `getline' instead
+returns -2 and further calls to `getline' may succeed.  This applies to
+the `errno' values `EAGAIN', `EWOULDBLOCK', `EINTR', or `ETIMEDOUT'.
 
    This feature is useful in conjunction with `PROCINFO["INPUT_NAME",
 "READ_TIMEOUT"]' or situations where a file descriptor has been
@@ -12031,7 +12031,17 @@ brackets ([ ]):
 `cos(X)'
      Return the cosine of X, with X in radians.
 
-`div(NUMERATOR, DENOMINATOR, RESULT)'
+`exp(X)'
+     Return the exponential of X (`e ^ X') or report an error if X is
+     out of range.  The range of values X can have depends on your
+     machine's floating-point representation.
+
+`int(X)'
+     Return the nearest integer to X, located between X and zero and
+     truncated toward zero.  For example, `int(3)' is 3, `int(3.9)' is
+     3, `int(-3.9)' is -3, and `int(-3)' is -3 as well.
+
+`intdiv(NUMERATOR, DENOMINATOR, RESULT)'
      Perform integer division, similar to the standard C function of the
      same name.  First, truncate `numerator' and `denominator' towards
      zero, creating integer values.  Clear the `result' array, and then
@@ -12046,16 +12056,6 @@ brackets ([ ]):
      This function is a `gawk' extension.  It is not available in
      compatibility mode (*note Options::).
 
-`exp(X)'
-     Return the exponential of X (`e ^ X') or report an error if X is
-     out of range.  The range of values X can have depends on your
-     machine's floating-point representation.
-
-`int(X)'
-     Return the nearest integer to X, located between X and zero and
-     truncated toward zero.  For example, `int(3)' is 3, `int(3.9)' is
-     3, `int(-3.9)' is -3, and `int(-3)' is -3 as well.
-
 `log(X)'
      Return the natural logarithm of X, if X is positive; otherwise,
      return `NaN' ("not a number") on IEEE 754 systems.  Additionally,
@@ -12075,9 +12075,9 @@ brackets ([ ]):
               return int(n * rand())
           }
 
-     The multiplication produces a random number greater than zero and
-     less than `n'.  Using `int()', this result is made into an integer
-     between zero and `n' - 1, inclusive.
+     The multiplication produces a random number greater than or equal
+     to zero and less than `n'.  Using `int()', this result is made into
+     an integer between zero and `n' - 1, inclusive.
 
      The following example uses a similar function to produce random
      integers between one and N.  This program prints a new random
@@ -14440,9 +14440,17 @@ function call.
 
    Starting with version 4.1.2 of `gawk', indirect function calls may
 also be used with built-in functions and with extension functions
-(*note Dynamic Extensions::).  The only thing you cannot do is pass a
-regular expression constant to a built-in function through an indirect
-function call.(1)
+(*note Dynamic Extensions::). There are some limitations when calling
+built-in functions indirectly, as follows.
+
+   * You cannot pass a regular expression constant to a built-in
+     function through an indirect function call.(1) This applies to the
+     `sub()', `gsub()', `gensub()', `match()', `split()' and
+     `patsplit()' functions.
+
+   * If calling `sub()' or `gsub()', you may only pass two arguments,
+     since those functions are unusual in that they update their third
+     argument.  This means that `$0' will be updated.
 
    `gawk' does its best to make indirect function calls efficient.  For
 example, in the following case:
@@ -22610,14 +22618,15 @@ the following:
 `%', the result is typically an arbitrary precision floating point
 value (unless the denominator evenly divides into the numerator).  In
 order to do integer division or remainder with arbitrary precision
-integers, use the built-in `div()' function (*note Numeric Functions::).
+integers, use the built-in `intdiv()' function (*note Numeric
+Functions::).
 
-   You can simulate the `div()' function in standard `awk' using this
-user-defined function:
+   You can simulate the `intdiv()' function in standard `awk' using
+this user-defined function:
 
-     # div --- do integer division
+     # intdiv --- do integer division
 
-     function div(numerator, denominator, result)
+     function intdiv(numerator, denominator, result)
      {
          split("", result)
 
@@ -22630,8 +22639,8 @@ user-defined function:
      }
 
    The following example program, contributed by Katie Wasserman, uses
-`div()' to compute the digits of pi to as many places as you choose to
-set:
+`intdiv()' to compute the digits of pi to as many places as you choose
+to set:
 
      # pi.awk --- compute the digits of pi
 
@@ -22642,7 +22651,7 @@ set:
          for (m = digits * 4; m > 0; --m) {
              d = m * 2 + 1
              x = pi * m
-             div(x, d, result)
+             intdiv(x, d, result)
              pi = result["quotient"]
              pi = pi + two
          }
@@ -26259,15 +26268,17 @@ project.
 
    * GD graphics library extension
 
+   * MPFR library extension (this provides access to a number of MPFR
+     functions that `gawk''s native MPFR support does not)
+
    * PDF extension
 
    * PostgreSQL extension
 
-   * MPFR library extension (this provides access to a number of MPFR
-     functions that `gawk''s native MPFR support does not)
-
    * Redis extension
 
+   * Select extension
+
    * XML parser extension, using the Expat
      (http://expat.sourceforge.net) XML parsing library
 
@@ -26742,8 +26753,8 @@ the current version of `gawk'.
         - The `bindtextdomain()', `dcgettext()', and `dcngettext()'
           functions for internationalization (*note Programmer i18n::)
 
-        - The `div()' function for doing integer division and remainder
-          (*note Numeric Functions::)
+        - The `intdiv()' function for doing integer division and
+          remainder (*note Numeric Functions::)
 
    * Changes and/or additions in the command-line options:
 
@@ -27203,7 +27214,7 @@ in POSIX `awk', in the order they were added to `gawk'.
    * The `igawk' program and its manual page are no longer installed
      when `gawk' is built.  *Note Igawk Program::.
 
-   * The `div()' function.  *Note Numeric Functions::.
+   * The `intdiv()' function.  *Note Numeric Functions::.
 
    * The maximum number of hexdecimal digits in `\x' escapes is now two.
      *Note Escape Sequences::.
@@ -32931,7 +32942,6 @@ Index
 * display debugger command:              Viewing And Changing Data.
                                                               (line   8)
 * display debugger options:              Debugger Info.       (line  57)
-* div:                                   Numeric Functions.   (line  18)
 * division:                              Arithmetic Ops.      (line  44)
 * do-while statement:                    Do Statement.        (line   6)
 * do-while statement, use of regexps in: Regexp Usage.        (line  19)
@@ -33051,10 +33061,10 @@ Index
 * exit status, of VMS:                   VMS Running.         (line  28)
 * exit the debugger:                     Miscellaneous Debugger Commands.
                                                               (line  99)
-* exp:                                   Numeric Functions.   (line  33)
+* exp:                                   Numeric Functions.   (line  18)
 * expand utility:                        Very Simple.         (line  73)
-* Expat XML parser library:              gawkextlib.          (line  35)
-* exponent:                              Numeric Functions.   (line  33)
+* Expat XML parser library:              gawkextlib.          (line  37)
+* exponent:                              Numeric Functions.   (line  18)
 * expressions:                           Expressions.         (line   6)
 * expressions, as patterns:              Expression Patterns. (line   6)
 * expressions, assignment:               Assignment Ops.      (line   6)
@@ -33473,7 +33483,7 @@ Index
 * git utility <2>:                       Accessing The Source.
                                                               (line  10)
 * git utility <3>:                       Other Versions.      (line  29)
-* git utility:                           gawkextlib.          (line  29)
+* git utility:                           gawkextlib.          (line  31)
 * Git, use of for gawk source code:      Derived Files.       (line   6)
 * GNITS mailing list:                    Acknowledgments.     (line  52)
 * GNU awk, See gawk:                     Preface.             (line  51)
@@ -33598,8 +33608,9 @@ Index
 * installation, VMS:                     VMS Installation.    (line   6)
 * installing gawk:                       Installation.        (line   6)
 * instruction tracing, in debugger:      Debugger Info.       (line  90)
-* int:                                   Numeric Functions.   (line  38)
+* int:                                   Numeric Functions.   (line  23)
 * INT signal (MS-Windows):               Profiling.           (line 213)
+* intdiv:                                Numeric Functions.   (line  28)
 * integer array indices:                 Numeric Array Subscripts.
                                                               (line  31)
 * integers, arbitrary precision:         Arbitrary Precision Integers.
@@ -34339,7 +34350,7 @@ Index
 * Robbins, Miriam <2>:                   Getline/Pipe.        (line  39)
 * Robbins, Miriam:                       Acknowledgments.     (line  94)
 * Rommel, Kai Uwe:                       Contributors.        (line  42)
-* round to nearest integer:              Numeric Functions.   (line  38)
+* round to nearest integer:              Numeric Functions.   (line  23)
 * round() user-defined function:         Round Function.      (line  16)
 * rounding numbers:                      Round Function.      (line   6)
 * ROUNDMODE variable:                    User-modified.       (line 127)
@@ -34997,452 +35008,452 @@ Ref: table-getline-variants261262
 Node: Read Timeout262091
 Ref: Read Timeout-Footnote-1265994
 Node: Retrying Input266052
-Node: Command-line directories267238
-Node: Input Summary268145
-Node: Input Exercises271530
-Node: Printing272258
-Node: Print274093
-Node: Print Examples275550
-Node: Output Separators278329
-Node: OFMT280347
-Node: Printf281702
-Node: Basic Printf282487
-Node: Control Letters284059
-Node: Format Modifiers288044
-Node: Printf Examples294050
-Node: Redirection296536
-Node: Special FD303374
-Ref: Special FD-Footnote-1306540
-Node: Special Files306614
-Node: Other Inherited Files307231
-Node: Special Network308231
-Node: Special Caveats309093
-Node: Close Files And Pipes310042
-Ref: Close Files And Pipes-Footnote-1317227
-Ref: Close Files And Pipes-Footnote-2317375
-Node: Nonfatal317525
-Node: Output Summary319850
-Node: Output Exercises321071
-Node: Expressions321751
-Node: Values322940
-Node: Constants323617
-Node: Scalar Constants324308
-Ref: Scalar Constants-Footnote-1325170
-Node: Nondecimal-numbers325420
-Node: Regexp Constants328430
-Node: Using Constant Regexps328956
-Node: Variables332119
-Node: Using Variables332776
-Node: Assignment Options334687
-Node: Conversion336562
-Node: Strings And Numbers337086
-Ref: Strings And Numbers-Footnote-1340151
-Node: Locale influences conversions340260
-Ref: table-locale-affects343006
-Node: All Operators343598
-Node: Arithmetic Ops344227
-Node: Concatenation346732
-Ref: Concatenation-Footnote-1349551
-Node: Assignment Ops349658
-Ref: table-assign-ops354637
-Node: Increment Ops355947
-Node: Truth Values and Conditions359378
-Node: Truth Values360461
-Node: Typing and Comparison361510
-Node: Variable Typing362326
-Node: Comparison Operators365993
-Ref: table-relational-ops366403
-Node: POSIX String Comparison369898
-Ref: POSIX String Comparison-Footnote-1370970
-Node: Boolean Ops371109
-Ref: Boolean Ops-Footnote-1375587
-Node: Conditional Exp375678
-Node: Function Calls377416
-Node: Precedence381296
-Node: Locales384956
-Node: Expressions Summary386588
-Node: Patterns and Actions389159
-Node: Pattern Overview390279
-Node: Regexp Patterns391958
-Node: Expression Patterns392501
-Node: Ranges396281
-Node: BEGIN/END399388
-Node: Using BEGIN/END400149
-Ref: Using BEGIN/END-Footnote-1402885
-Node: I/O And BEGIN/END402991
-Node: BEGINFILE/ENDFILE405306
-Node: Empty408203
-Node: Using Shell Variables408520
-Node: Action Overview410793
-Node: Statements413119
-Node: If Statement414967
-Node: While Statement416462
-Node: Do Statement418490
-Node: For Statement419638
-Node: Switch Statement422796
-Node: Break Statement425178
-Node: Continue Statement427271
-Node: Next Statement429098
-Node: Nextfile Statement431479
-Node: Exit Statement434107
-Node: Built-in Variables436518
-Node: User-modified437651
-Ref: User-modified-Footnote-1445285
-Node: Auto-set445347
-Ref: Auto-set-Footnote-1459580
-Ref: Auto-set-Footnote-2459785
-Node: ARGC and ARGV459841
-Node: Pattern Action Summary464059
-Node: Arrays466492
-Node: Array Basics467821
-Node: Array Intro468665
-Ref: figure-array-elements470602
-Ref: Array Intro-Footnote-1473225
-Node: Reference to Elements473353
-Node: Assigning Elements475815
-Node: Array Example476306
-Node: Scanning an Array478065
-Node: Controlling Scanning481088
-Ref: Controlling Scanning-Footnote-1486482
-Node: Numeric Array Subscripts486798
-Node: Uninitialized Subscripts488983
-Node: Delete490600
-Ref: Delete-Footnote-1493349
-Node: Multidimensional493406
-Node: Multiscanning496503
-Node: Arrays of Arrays498092
-Node: Arrays Summary502846
-Node: Functions504937
-Node: Built-in505976
-Node: Calling Built-in507054
-Node: Numeric Functions509049
-Ref: Numeric Functions-Footnote-1513867
-Ref: Numeric Functions-Footnote-2514224
-Ref: Numeric Functions-Footnote-3514272
-Node: String Functions514544
-Ref: String Functions-Footnote-1538045
-Ref: String Functions-Footnote-2538174
-Ref: String Functions-Footnote-3538422
-Node: Gory Details538509
-Ref: table-sub-escapes540290
-Ref: table-sub-proposed541805
-Ref: table-posix-sub543167
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-Node: I/O Functions545688
-Ref: I/O Functions-Footnote-1552924
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-Ref: Time Functions-Footnote-1563580
-Ref: Time Functions-Footnote-2563648
-Ref: Time Functions-Footnote-3563806
-Ref: Time Functions-Footnote-4563917
-Ref: Time Functions-Footnote-5564029
-Ref: Time Functions-Footnote-6564256
-Node: Bitwise Functions564522
-Ref: table-bitwise-ops565084
-Ref: Bitwise Functions-Footnote-1569412
-Node: Type Functions569584
-Node: I18N Functions570736
-Node: User-defined572383
-Node: Definition Syntax573188
-Ref: Definition Syntax-Footnote-1578847
-Node: Function Example578918
-Ref: Function Example-Footnote-1581839
-Node: Function Caveats581861
-Node: Calling A Function582379
-Node: Variable Scope583337
-Node: Pass By Value/Reference586330
-Node: Return Statement589827
-Node: Dynamic Typing592806
-Node: Indirect Calls593735
-Ref: Indirect Calls-Footnote-1603600
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-Node: Library Functions606430
-Ref: Library Functions-Footnote-1610038
-Ref: Library Functions-Footnote-2610181
-Node: Library Names610352
-Ref: Library Names-Footnote-1613810
-Ref: Library Names-Footnote-2614033
-Node: General Functions614119
-Node: Strtonum Function615222
-Node: Assert Function618244
-Node: Round Function621568
-Node: Cliff Random Function623109
-Node: Ordinal Functions624125
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-Ref: Ordinal Functions-Footnote-2627440
-Node: Join Function627651
-Ref: Join Function-Footnote-1629421
-Node: Getlocaltime Function629621
-Node: Readfile Function633365
-Node: Shell Quoting635337
-Node: Data File Management636738
-Node: Filetrans Function637370
-Node: Rewind Function641466
-Node: File Checking642852
-Ref: File Checking-Footnote-1644185
-Node: Empty Files644386
-Node: Ignoring Assigns646365
-Node: Getopt Function647915
-Ref: Getopt Function-Footnote-1659379
-Node: Passwd Functions659579
-Ref: Passwd Functions-Footnote-1668419
-Node: Group Functions668507
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-Node: Walking Arrays676609
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-Node: Library Exercises681017
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-Node: Running Examples683067
-Node: Clones683795
-Node: Cut Program685019
-Node: Egrep Program694739
-Ref: Egrep Program-Footnote-1702242
-Node: Id Program702352
-Node: Split Program706028
-Ref: Split Program-Footnote-1709482
-Node: Tee Program709610
-Node: Uniq Program712399
-Node: Wc Program719818
-Ref: Wc Program-Footnote-1724068
-Node: Miscellaneous Programs724162
-Node: Dupword Program725375
-Node: Alarm Program727406
-Node: Translate Program732211
-Ref: Translate Program-Footnote-1736774
-Node: Labels Program737044
-Ref: Labels Program-Footnote-1740395
-Node: Word Sorting740479
-Node: History Sorting744549
-Node: Extract Program746384
-Node: Simple Sed753908
-Node: Igawk Program756978
-Ref: Igawk Program-Footnote-1771304
-Ref: Igawk Program-Footnote-2771505
-Ref: Igawk Program-Footnote-3771627
-Node: Anagram Program771742
-Node: Signature Program774803
-Node: Programs Summary776050
-Node: Programs Exercises777271
-Ref: Programs Exercises-Footnote-1781402
-Node: Advanced Features781493
-Node: Nondecimal Data783475
-Node: Array Sorting785065
-Node: Controlling Array Traversal785765
-Ref: Controlling Array Traversal-Footnote-1794131
-Node: Array Sorting Functions794249
-Ref: Array Sorting Functions-Footnote-1798135
-Node: Two-way I/O798331
-Ref: Two-way I/O-Footnote-1803276
-Ref: Two-way I/O-Footnote-2803462
-Node: TCP/IP Networking803544
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-Node: Internationalization816620
-Node: I18N and L10N818100
-Node: Explaining gettext818786
-Ref: Explaining gettext-Footnote-1823811
-Ref: Explaining gettext-Footnote-2823995
-Node: Programmer i18n824160
-Ref: Programmer i18n-Footnote-1829036
-Node: Translator i18n829085
-Node: String Extraction829879
-Ref: String Extraction-Footnote-1831010
-Node: Printf Ordering831096
-Ref: Printf Ordering-Footnote-1833882
-Node: I18N Portability833946
-Ref: I18N Portability-Footnote-1836402
-Node: I18N Example836465
-Ref: I18N Example-Footnote-1839268
-Node: Gawk I18N839340
-Node: I18N Summary839984
-Node: Debugger841324
-Node: Debugging842346
-Node: Debugging Concepts842787
-Node: Debugging Terms844597
-Node: Awk Debugging847169
-Node: Sample Debugging Session848075
-Node: Debugger Invocation848609
-Node: Finding The Bug849994
-Node: List of Debugger Commands856473
-Node: Breakpoint Control857805
-Node: Debugger Execution Control861482
-Node: Viewing And Changing Data864841
-Node: Execution Stack868217
-Node: Debugger Info869852
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-Node: Readline Support878898
-Node: Limitations879792
-Node: Debugging Summary881907
-Node: Arbitrary Precision Arithmetic883081
-Node: Computer Arithmetic884497
-Ref: table-numeric-ranges888074
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-Node: Math Definitions888655
-Ref: table-ieee-formats891950
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-Node: MPFR features892659
-Node: FP Math Caution894330
-Ref: FP Math Caution-Footnote-1895380
-Node: Inexactness of computations895749
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-Node: Comparing FP Values898066
-Node: Errors accumulate899148
-Node: Getting Accuracy900580
-Node: Try To Round903284
-Node: Setting precision904183
-Ref: table-predefined-precision-strings904867
-Node: Setting the rounding mode906696
-Ref: table-gawk-rounding-modes907060
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-Node: Arbitrary Precision Integers910691
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-Node: POSIX Floating Point Problems915738
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-Node: Floating point summary919655
-Node: Dynamic Extensions921842
-Node: Extension Intro923394
-Node: Plugin License924659
-Node: Extension Mechanism Outline925456
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-Node: Extension API Functions Introduction931889
-Node: General Data Types936758
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-Node: Memory Allocation Functions942957
-Ref: Memory Allocation Functions-Footnote-1945796
-Node: Constructor Functions945895
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-Node: Extension Functions948319
-Node: Exit Callback Functions950616
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-Node: Output Wrappers962402
-Node: Two-way processors966915
-Node: Printing Messages969178
-Ref: Printing Messages-Footnote-1970254
-Node: Updating `ERRNO'970406
-Node: Requesting Values971146
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-Node: Cached values980806
-Ref: Cached values-Footnote-1984302
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-Node: Extension API Variables1006624
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-Node: Finding Extensions1014022
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-Node: Internal File Description1015354
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-Node: Using Internal File Ops1031312
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-Node: Extension Samples1033968
-Node: Extension Sample File Functions1035496
-Node: Extension Sample Fnmatch1043177
-Node: Extension Sample Fork1044665
-Node: Extension Sample Inplace1045880
-Node: Extension Sample Ord1047966
-Node: Extension Sample Readdir1048802
-Ref: table-readdir-file-types1049679
-Node: Extension Sample Revout1050490
-Node: Extension Sample Rev2way1051079
-Node: Extension Sample Read write array1051819
-Node: Extension Sample Readfile1053759
-Node: Extension Sample Time1054854
-Node: Extension Sample API Tests1056202
-Node: gawkextlib1056693
-Node: Extension summary1059371
-Node: Extension Exercises1063060
-Node: Language History1064556
-Node: V7/SVR3.11066212
-Node: SVR41068365
-Node: POSIX1069799
-Node: BTL1071180
-Node: POSIX/GNU1071911
-Node: Feature History1077747
-Node: Common Extensions1091541
-Node: Ranges and Locales1092913
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-Ref: Ranges and Locales-Footnote-21097559
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-Node: Contributors1098015
-Node: History summary1103555
-Node: Installation1104934
-Node: Gawk Distribution1105880
-Node: Getting1106364
-Node: Extracting1107187
-Node: Distribution contents1108824
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-Node: Quick Installation1115609
-Node: Shell Startup Files1118020
-Node: Additional Configuration Options1119099
-Node: Configuration Philosophy1120903
-Node: Non-Unix Installation1123272
-Node: PC Installation1123730
-Node: PC Binary Installation1125050
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-Ref: PC Compiling-Footnote-11129919
-Node: PC Testing1130028
-Node: PC Using1131204
-Node: Cygwin1135319
-Node: MSYS1136089
-Node: VMS Installation1136590
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-Node: VMS Dynamic Extensions1138669
-Node: VMS Installation Details1140353
-Node: VMS Running1142604
-Node: VMS GNV1145444
-Node: VMS Old Gawk1146179
-Node: Bugs1146649
-Node: Other Versions1150538
-Node: Installation summary1156972
-Node: Notes1158031
-Node: Compatibility Mode1158896
-Node: Additions1159678
-Node: Accessing The Source1160603
-Node: Adding Code1162038
-Node: New Ports1168195
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 End Tag Table