Merge branch 'gawk-4.1-stable'

4 files changed, 649 insertions, 517 deletions

diff --git a/doc/ChangeLog b/doc/ChangeLog
index e70a49bc..eecfbd04 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,8 @@
+2014-05-07         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in: Docbook edits for preface and parts.
+	Document AWKBUFSIZE.
+
 2014-05-05         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* gawktexi.in: Editing progress. Through Chapter 9.
diff --git a/doc/gawk.info b/doc/gawk.info
index 2f45d06f..faaa1364 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -2875,9 +2875,18 @@ used by regular users.
 the `gawk' developers for testing and tuning.  They are subject to
 change. The variables are:
 
+`AWKBUFSIZE'
+     This variable only affects `gawk' on POSIX-compliant systems.
+     With a value of `exact', `gawk' uses the size of each input file
+     as the size of the memory buffer to allocate for I/O. Otherwise,
+     the value should be a number, and `gawk' uses that number as the
+     size of the buffer to allocate.  (When this variable is not set,
+     `gawk' uses the smaller of the file's size and the "default"
+     blocksize, which is usually the file systems I/O blocksize.)
+
 `AWK_HASH'
-     If this variable exists with a value of `gst', `gawk' will switch
-     to using the hash function from GNU Smalltalk for managing arrays.
+     If this variable exists with a value of `gst', `gawk' switches to
+     using the hash function from GNU Smalltalk for managing arrays.
      This function may be marginally faster than the standard function.
 
 `AWKREADFUNC'
@@ -33251,484 +33260,484 @@ Ref: AWKPATH Variable-Footnote-1133823
 Ref: AWKPATH Variable-Footnote-2133868
 Node: AWKLIBPATH Variable134128
 Node: Other Environment Variables134887
-Node: Exit Status138052
-Node: Include Files138727
-Node: Loading Shared Libraries142305
-Node: Obsolete143688
-Node: Undocumented144385
-Node: Regexp144627
-Node: Regexp Usage146016
-Node: Escape Sequences148049
-Node: Regexp Operators153716
-Ref: Regexp Operators-Footnote-1161196
-Ref: Regexp Operators-Footnote-2161343
-Node: Bracket Expressions161441
-Ref: table-char-classes163331
-Node: GNU Regexp Operators165854
-Node: Case-sensitivity169577
-Ref: Case-sensitivity-Footnote-1172469
-Ref: Case-sensitivity-Footnote-2172704
-Node: Leftmost Longest172812
-Node: Computed Regexps174013
-Node: Reading Files177362
-Node: Records179364
-Node: awk split records180099
-Node: gawk split records184957
-Ref: gawk split records-Footnote-1189478
-Node: Fields189515
-Ref: Fields-Footnote-1192479
-Node: Nonconstant Fields192565
-Ref: Nonconstant Fields-Footnote-1194795
-Node: Changing Fields194997
-Node: Field Separators200951
-Node: Default Field Splitting203653
-Node: Regexp Field Splitting204770
-Node: Single Character Fields208111
-Node: Command Line Field Separator209170
-Node: Full Line Fields212512
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-Node: Field Splitting Summary213066
-Ref: Field Splitting Summary-Footnote-1216165
-Node: Constant Size216266
-Node: Splitting By Content220873
-Ref: Splitting By Content-Footnote-1224623
-Node: Multiple Line224663
-Ref: Multiple Line-Footnote-1230519
-Node: Getline230698
-Node: Plain Getline232914
-Node: Getline/Variable235009
-Node: Getline/File236156
-Node: Getline/Variable/File237540
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-Node: Getline/Pipe239226
-Node: Getline/Variable/Pipe241925
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-Node: Getline Notes245021
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+Node: Arrays of Arrays466154
+Node: Functions470794
+Node: Built-in471613
+Node: Calling Built-in472691
+Node: Numeric Functions474679
+Ref: Numeric Functions-Footnote-1478513
+Ref: Numeric Functions-Footnote-2478870
+Ref: Numeric Functions-Footnote-3478918
+Node: String Functions479187
+Ref: String Functions-Footnote-1502198
+Ref: String Functions-Footnote-2502327
+Ref: String Functions-Footnote-3502575
+Node: Gory Details502662
+Ref: table-sub-escapes504331
+Ref: table-sub-posix-92505685
+Ref: table-sub-proposed507036
+Ref: table-posix-sub508390
+Ref: table-gensub-escapes509935
+Ref: Gory Details-Footnote-1511111
+Ref: Gory Details-Footnote-2511162
+Node: I/O Functions511313
+Ref: I/O Functions-Footnote-1518436
+Node: Time Functions518583
+Ref: Time Functions-Footnote-1529047
+Ref: Time Functions-Footnote-2529115
+Ref: Time Functions-Footnote-3529273
+Ref: Time Functions-Footnote-4529384
+Ref: Time Functions-Footnote-5529496
+Ref: Time Functions-Footnote-6529723
+Node: Bitwise Functions529989
+Ref: table-bitwise-ops530551
+Ref: Bitwise Functions-Footnote-1534796
+Node: Type Functions534980
+Node: I18N Functions536122
+Node: User-defined537767
+Node: Definition Syntax538571
+Ref: Definition Syntax-Footnote-1543486
+Node: Function Example543555
+Ref: Function Example-Footnote-1546199
+Node: Function Caveats546221
+Node: Calling A Function546739
+Node: Variable Scope547694
+Node: Pass By Value/Reference550682
+Node: Return Statement554190
+Node: Dynamic Typing557172
+Node: Indirect Calls558101
+Node: Library Functions567788
+Ref: Library Functions-Footnote-1571301
+Ref: Library Functions-Footnote-2571444
+Node: Library Names571615
+Ref: Library Names-Footnote-1575088
+Ref: Library Names-Footnote-2575308
+Node: General Functions575394
+Node: Strtonum Function576422
+Node: Assert Function579352
+Node: Round Function582678
+Node: Cliff Random Function584219
+Node: Ordinal Functions585235
+Ref: Ordinal Functions-Footnote-1588312
+Ref: Ordinal Functions-Footnote-2588564
+Node: Join Function588775
+Ref: Join Function-Footnote-1590546
+Node: Getlocaltime Function590746
+Node: Readfile Function594487
+Node: Data File Management596326
+Node: Filetrans Function596958
+Node: Rewind Function601027
+Node: File Checking602414
+Node: Empty Files603508
+Node: Ignoring Assigns605738
+Node: Getopt Function607292
+Ref: Getopt Function-Footnote-1618595
+Node: Passwd Functions618798
+Ref: Passwd Functions-Footnote-1627776
+Node: Group Functions627864
+Node: Walking Arrays635948
+Node: Sample Programs638084
+Node: Running Examples638758
+Node: Clones639486
+Node: Cut Program640710
+Node: Egrep Program650561
+Ref: Egrep Program-Footnote-1658334
+Node: Id Program658444
+Node: Split Program662093
+Ref: Split Program-Footnote-1665612
+Node: Tee Program665740
+Node: Uniq Program668543
+Node: Wc Program675972
+Ref: Wc Program-Footnote-1680238
+Ref: Wc Program-Footnote-2680438
+Node: Miscellaneous Programs680530
+Node: Dupword Program681718
+Node: Alarm Program683749
+Node: Translate Program688556
+Ref: Translate Program-Footnote-1692943
+Ref: Translate Program-Footnote-2693191
+Node: Labels Program693325
+Ref: Labels Program-Footnote-1696696
+Node: Word Sorting696780
+Node: History Sorting700664
+Node: Extract Program702503
+Ref: Extract Program-Footnote-1710006
+Node: Simple Sed710134
+Node: Igawk Program713196
+Ref: Igawk Program-Footnote-1728367
+Ref: Igawk Program-Footnote-2728568
+Node: Anagram Program728706
+Node: Signature Program731774
+Node: Advanced Features732874
+Node: Nondecimal Data734760
+Node: Array Sorting736343
+Node: Controlling Array Traversal737040
+Node: Array Sorting Functions745324
+Ref: Array Sorting Functions-Footnote-1749193
+Node: Two-way I/O749387
+Ref: Two-way I/O-Footnote-1754819
+Node: TCP/IP Networking754901
+Node: Profiling757745
+Node: Internationalization765248
+Node: I18N and L10N766673
+Node: Explaining gettext767359
+Ref: Explaining gettext-Footnote-1772427
+Ref: Explaining gettext-Footnote-2772611
+Node: Programmer i18n772776
+Node: Translator i18n777003
+Node: String Extraction777797
+Ref: String Extraction-Footnote-1778758
+Node: Printf Ordering778844
+Ref: Printf Ordering-Footnote-1781626
+Node: I18N Portability781690
+Ref: I18N Portability-Footnote-1784139
+Node: I18N Example784202
+Ref: I18N Example-Footnote-1786840
+Node: Gawk I18N786912
+Node: Debugger787533
+Node: Debugging788504
+Node: Debugging Concepts788937
+Node: Debugging Terms790793
+Node: Awk Debugging793390
+Node: Sample Debugging Session794282
+Node: Debugger Invocation794802
+Node: Finding The Bug796135
+Node: List of Debugger Commands802622
+Node: Breakpoint Control803956
+Node: Debugger Execution Control807620
+Node: Viewing And Changing Data810980
+Node: Execution Stack814336
+Node: Debugger Info815803
+Node: Miscellaneous Debugger Commands819797
+Node: Readline Support824975
+Node: Limitations825806
+Node: Arbitrary Precision Arithmetic828058
+Ref: Arbitrary Precision Arithmetic-Footnote-1829707
+Node: General Arithmetic829855
+Node: Floating Point Issues831575
+Node: String Conversion Precision832456
+Ref: String Conversion Precision-Footnote-1834161
+Node: Unexpected Results834270
+Node: POSIX Floating Point Problems836423
+Ref: POSIX Floating Point Problems-Footnote-1840248
+Node: Integer Programming840286
+Node: Floating-point Programming842025
+Ref: Floating-point Programming-Footnote-1848356
+Ref: Floating-point Programming-Footnote-2848626
+Node: Floating-point Representation848890
+Node: Floating-point Context850055
+Ref: table-ieee-formats850894
+Node: Rounding Mode852278
+Ref: table-rounding-modes852757
+Ref: Rounding Mode-Footnote-1855772
+Node: Gawk and MPFR855951
+Node: Arbitrary Precision Floats857360
+Ref: Arbitrary Precision Floats-Footnote-1859803
+Node: Setting Precision860119
+Ref: table-predefined-precision-strings860805
+Node: Setting Rounding Mode862950
+Ref: table-gawk-rounding-modes863354
+Node: Floating-point Constants864541
+Node: Changing Precision865970
+Ref: Changing Precision-Footnote-1867367
+Node: Exact Arithmetic867541
+Node: Arbitrary Precision Integers870679
+Ref: Arbitrary Precision Integers-Footnote-1873694
+Node: Dynamic Extensions873841
+Node: Extension Intro875299
+Node: Plugin License876564
+Node: Extension Mechanism Outline877249
+Ref: load-extension877666
+Ref: load-new-function879144
+Ref: call-new-function880139
+Node: Extension API Description882154
+Node: Extension API Functions Introduction883441
+Node: General Data Types888368
+Ref: General Data Types-Footnote-1894063
+Node: Requesting Values894362
+Ref: table-value-types-returned895099
+Node: Memory Allocation Functions896053
+Ref: Memory Allocation Functions-Footnote-1898799
+Node: Constructor Functions898895
+Node: Registration Functions900653
+Node: Extension Functions901338
+Node: Exit Callback Functions903640
+Node: Extension Version String904889
+Node: Input Parsers905539
+Node: Output Wrappers915296
+Node: Two-way processors919806
+Node: Printing Messages922014
+Ref: Printing Messages-Footnote-1923091
+Node: Updating `ERRNO'923243
+Node: Accessing Parameters923982
+Node: Symbol Table Access925212
+Node: Symbol table by name925726
+Node: Symbol table by cookie927702
+Ref: Symbol table by cookie-Footnote-1931834
+Node: Cached values931897
+Ref: Cached values-Footnote-1935387
+Node: Array Manipulation935478
+Ref: Array Manipulation-Footnote-1936576
+Node: Array Data Types936615
+Ref: Array Data Types-Footnote-1939318
+Node: Array Functions939410
+Node: Flattening Arrays943246
+Node: Creating Arrays950098
+Node: Extension API Variables954823
+Node: Extension Versioning955459
+Node: Extension API Informational Variables957360
+Node: Extension API Boilerplate958446
+Node: Finding Extensions962250
+Node: Extension Example962810
+Node: Internal File Description963540
+Node: Internal File Ops967631
+Ref: Internal File Ops-Footnote-1979140
+Node: Using Internal File Ops979280
+Ref: Using Internal File Ops-Footnote-1981627
+Node: Extension Samples981893
+Node: Extension Sample File Functions983417
+Node: Extension Sample Fnmatch991904
+Node: Extension Sample Fork993673
+Node: Extension Sample Inplace994886
+Node: Extension Sample Ord996664
+Node: Extension Sample Readdir997500
+Node: Extension Sample Revout999032
+Node: Extension Sample Rev2way999625
+Node: Extension Sample Read write array1000315
+Node: Extension Sample Readfile1002198
+Node: Extension Sample API Tests1003298
+Node: Extension Sample Time1003823
+Node: gawkextlib1005187
+Node: Language History1007968
+Node: V7/SVR3.11009561
+Node: SVR41011881
+Node: POSIX1013323
+Node: BTL1014709
+Node: POSIX/GNU1015443
+Node: Feature History1021042
+Node: Common Extensions1034018
+Node: Ranges and Locales1035330
+Ref: Ranges and Locales-Footnote-11039947
+Ref: Ranges and Locales-Footnote-21039974
+Ref: Ranges and Locales-Footnote-31040208
+Node: Contributors1040429
+Node: Installation1045810
+Node: Gawk Distribution1046704
+Node: Getting1047188
+Node: Extracting1048014
+Node: Distribution contents1049706
+Node: Unix Installation1055427
+Node: Quick Installation1056044
+Node: Additional Configuration Options1058490
+Node: Configuration Philosophy1060226
+Node: Non-Unix Installation1062580
+Node: PC Installation1063038
+Node: PC Binary Installation1064337
+Node: PC Compiling1066185
+Node: PC Testing1069129
+Node: PC Using1070305
+Node: Cygwin1074473
+Node: MSYS1075282
+Node: VMS Installation1075796
+Node: VMS Compilation1076592
+Ref: VMS Compilation-Footnote-11077844
+Node: VMS Dynamic Extensions1077902
+Node: VMS Installation Details1079275
+Node: VMS Running1081526
+Node: VMS GNV1084360
+Node: VMS Old Gawk1085083
+Node: Bugs1085553
+Node: Other Versions1089471
+Node: Notes1095555
+Node: Compatibility Mode1096355
+Node: Additions1097138
+Node: Accessing The Source1098065
+Node: Adding Code1099505
+Node: New Ports1105550
+Node: Derived Files1109685
+Ref: Derived Files-Footnote-11115006
+Ref: Derived Files-Footnote-21115040
+Ref: Derived Files-Footnote-31115640
+Node: Future Extensions1115738
+Node: Implementation Limitations1116321
+Node: Extension Design1117569
+Node: Old Extension Problems1118723
+Ref: Old Extension Problems-Footnote-11120231
+Node: Extension New Mechanism Goals1120288
+Ref: Extension New Mechanism Goals-Footnote-11123653
+Node: Extension Other Design Decisions1123839
+Node: Extension Future Growth1125945
+Node: Old Extension Mechanism1126781
+Node: Basic Concepts1128521
+Node: Basic High Level1129202
+Ref: figure-general-flow1129474
+Ref: figure-process-flow1130073
+Ref: Basic High Level-Footnote-11133302
+Node: Basic Data Typing1133487
+Node: Glossary1136842
+Node: Copying1162073
+Node: GNU Free Documentation License1199629
+Node: Index1224765
 
 End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index 6034cd92..708c3a3b 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -105,6 +105,21 @@
 @set COMMONEXT (c.e.)
 @end ifplaintext
 
+@ifdocbook
+@c empty on purpose
+@set PART1
+@set PART2
+@set PART3
+@set PART4
+@end ifdocbook
+
+@ifnotdocbook
+@set PART1 Part I:@*
+@set PART2 Part II:@*
+@set PART3 Part III:@*
+@set PART4 Part IV:@*
+@end ifnotdocbook
+
 @c some special symbols
 @iftex
 @set LEQ @math{@leq}
@@ -963,6 +978,20 @@ for enrichening our lives in innumerable ways.
 @node Foreword
 @unnumbered Foreword
 
+@c This bit is post-processed by a script which turns the chapter
+@c tag into a preface tag, and moves this stuff to before the title.
+@c Bleah.
+@docbook
+  <prefaceinfo>
+    <author>
+      <firstname>Michael</firstname>
+      <surname>Brennan</surname>
+      <affiliation><jobtitle>Author of <command>mawk</command></jobtitle></affiliation>
+    </author>
+    <date>March, 2001</date>
+   </prefaceinfo>
+@end docbook
+
 Arnold Robbins and I are good friends. We were introduced
 @c 11 years ago
 in 1990
@@ -1087,12 +1116,14 @@ Arnold has distilled over a decade of experience writing and
 using AWK programs, and developing @command{gawk}, into this book.  If you use
 AWK or want to learn how, then read this book.
 
+@ifnotdocbook
 @cindex Brennan, Michael
 @display
 Michael Brennan
 Author of @command{mawk}
 March, 2001
 @end display
+@end ifnotdocbook
 
 @node Preface
 @unnumbered Preface
@@ -1982,13 +2013,15 @@ Nof Ayalon @*
 ISRAEL @*
 May, 2014
 
-@iftex
-@part Part I:@* The @command{awk} Language
-@end iftex
+@ifnotinfo
+@part @value{PART1}The @command{awk} Language
+@end ifnotinfo
 
 @ifdocbook
-@part The @command{awk} Language
 
+@docbook
+<partintro>
+@end docbook
 Part I describes the @command{awk} language and @command{gawk} program
 in detail.  It starts with the basics, and continues through all of
 the features of @command{awk}. Included also are many, but not all,
@@ -2023,6 +2056,9 @@ following chapters:
 @item
 @ref{Functions}.
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Getting Started
@@ -4141,9 +4177,18 @@ for use by the @command{gawk} developers for testing and tuning.
 They are subject to change. The variables are:
 
 @table @env
+@item AWKBUFSIZE
+This variable only affects @command{gawk} on POSIX-compliant systems.
+With a value of @samp{exact}, @command{gawk} uses the size of each input
+file as the size of the memory buffer to allocate for I/O. Otherwise,
+the value should be a number, and @command{gawk} uses that number as
+the size of the buffer to allocate.  (When this variable is not set,
+@command{gawk} uses the smaller of the file's size and the ``default''
+blocksize, which is usually the file systems I/O blocksize.)
+
 @item AWK_HASH
 If this variable exists with a value of @samp{gst}, @command{gawk}
-will switch to using the hash function from GNU Smalltalk for
+switches to using the hash function from GNU Smalltalk for
 managing arrays.
 This function may be marginally faster than the standard function.
 
@@ -19432,13 +19477,15 @@ for (i = 1; i <= n; i++)
 
 @c ENDOFRANGE funcud
 
-@iftex
-@part Part II:@* Problem Solving With @command{awk}
-@end iftex
+@ifnotinfo
+@part @value{PART2}Problem Solving With @command{awk}
+@end ifnotinfo
 
 @ifdocbook
-@part Problem Solving With @command{awk}
 
+@docbook
+<partintro>
+@end docbook
 Part II shows how to use @command{awk} and @command{gawk} for problem solving.
 There is lots of code here for you to read and learn from.
 It contains the following chapters:
@@ -19450,6 +19497,9 @@ It contains the following chapters:
 @item
 @ref{Sample Programs}.
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Library Functions
@@ -25517,13 +25567,15 @@ BEGIN {
 }
 @end ignore
 
-@iftex
-@part Part III:@* Moving Beyond Standard @command{awk} With @command{gawk}
-@end iftex
+@ifnotinfo
+@part @value{PART3}Moving Beyond Standard @command{awk} With @command{gawk}
+@end ifnotinfo
 
 @ifdocbook
-@part Moving Beyond Standard @command{awk} With @command{gawk}
 
+@docbook
+<partintro>
+@end docbook
 Part III focuses on features specific to @command{gawk}.
 It contains the following chapters:
 
@@ -25543,6 +25595,9 @@ It contains the following chapters:
 @item
 @ref{Dynamic Extensions}.
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Advanced Features
@@ -33928,14 +33983,15 @@ If you write an extension that you wish to share with other
 @code{gawkextlib} project.
 See the project's web site for more information.
 
-@iftex
-@part Part IV:@* Appendices
-@end iftex
+@ifnotinfo
+@part @value{PART4}Appendices
+@end ifnotinfo
 
 @ifdocbook
 
-@part Appendices
-
+@docbook
+<partintro>
+@end docbook
 @ifclear FOR_PRINT
 Part IV contains the appendixes (including the two licenses that cover
 the @command{gawk} source code and this @value{DOCUMENT}, respectively)
@@ -33970,6 +34026,9 @@ Part IV contains two appendixes:
 @ref{GNU Free Documentation License}.
 @end ifclear
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Language History
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index 5086a215..32a7543d 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -100,6 +100,21 @@
 @set COMMONEXT (c.e.)
 @end ifplaintext
 
+@ifdocbook
+@c empty on purpose
+@set PART1
+@set PART2
+@set PART3
+@set PART4
+@end ifdocbook
+
+@ifnotdocbook
+@set PART1 Part I:@*
+@set PART2 Part II:@*
+@set PART3 Part III:@*
+@set PART4 Part IV:@*
+@end ifnotdocbook
+
 @c some special symbols
 @iftex
 @set LEQ @math{@leq}
@@ -958,6 +973,20 @@ for enrichening our lives in innumerable ways.
 @node Foreword
 @unnumbered Foreword
 
+@c This bit is post-processed by a script which turns the chapter
+@c tag into a preface tag, and moves this stuff to before the title.
+@c Bleah.
+@docbook
+  <prefaceinfo>
+    <author>
+      <firstname>Michael</firstname>
+      <surname>Brennan</surname>
+      <affiliation><jobtitle>Author of <command>mawk</command></jobtitle></affiliation>
+    </author>
+    <date>March, 2001</date>
+   </prefaceinfo>
+@end docbook
+
 Arnold Robbins and I are good friends. We were introduced
 @c 11 years ago
 in 1990
@@ -1082,12 +1111,14 @@ Arnold has distilled over a decade of experience writing and
 using AWK programs, and developing @command{gawk}, into this book.  If you use
 AWK or want to learn how, then read this book.
 
+@ifnotdocbook
 @cindex Brennan, Michael
 @display
 Michael Brennan
 Author of @command{mawk}
 March, 2001
 @end display
+@end ifnotdocbook
 
 @node Preface
 @unnumbered Preface
@@ -1949,13 +1980,15 @@ Nof Ayalon @*
 ISRAEL @*
 May, 2014
 
-@iftex
-@part Part I:@* The @command{awk} Language
-@end iftex
+@ifnotinfo
+@part @value{PART1}The @command{awk} Language
+@end ifnotinfo
 
 @ifdocbook
-@part The @command{awk} Language
 
+@docbook
+<partintro>
+@end docbook
 Part I describes the @command{awk} language and @command{gawk} program
 in detail.  It starts with the basics, and continues through all of
 the features of @command{awk}. Included also are many, but not all,
@@ -1990,6 +2023,9 @@ following chapters:
 @item
 @ref{Functions}.
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Getting Started
@@ -4069,9 +4105,18 @@ for use by the @command{gawk} developers for testing and tuning.
 They are subject to change. The variables are:
 
 @table @env
+@item AWKBUFSIZE
+This variable only affects @command{gawk} on POSIX-compliant systems.
+With a value of @samp{exact}, @command{gawk} uses the size of each input
+file as the size of the memory buffer to allocate for I/O. Otherwise,
+the value should be a number, and @command{gawk} uses that number as
+the size of the buffer to allocate.  (When this variable is not set,
+@command{gawk} uses the smaller of the file's size and the ``default''
+blocksize, which is usually the file systems I/O blocksize.)
+
 @item AWK_HASH
 If this variable exists with a value of @samp{gst}, @command{gawk}
-will switch to using the hash function from GNU Smalltalk for
+switches to using the hash function from GNU Smalltalk for
 managing arrays.
 This function may be marginally faster than the standard function.
 
@@ -18605,13 +18650,15 @@ for (i = 1; i <= n; i++)
 
 @c ENDOFRANGE funcud
 
-@iftex
-@part Part II:@* Problem Solving With @command{awk}
-@end iftex
+@ifnotinfo
+@part @value{PART2}Problem Solving With @command{awk}
+@end ifnotinfo
 
 @ifdocbook
-@part Problem Solving With @command{awk}
 
+@docbook
+<partintro>
+@end docbook
 Part II shows how to use @command{awk} and @command{gawk} for problem solving.
 There is lots of code here for you to read and learn from.
 It contains the following chapters:
@@ -18623,6 +18670,9 @@ It contains the following chapters:
 @item
 @ref{Sample Programs}.
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Library Functions
@@ -24661,13 +24711,15 @@ BEGIN {
 }
 @end ignore
 
-@iftex
-@part Part III:@* Moving Beyond Standard @command{awk} With @command{gawk}
-@end iftex
+@ifnotinfo
+@part @value{PART3}Moving Beyond Standard @command{awk} With @command{gawk}
+@end ifnotinfo
 
 @ifdocbook
-@part Moving Beyond Standard @command{awk} With @command{gawk}
 
+@docbook
+<partintro>
+@end docbook
 Part III focuses on features specific to @command{gawk}.
 It contains the following chapters:
 
@@ -24687,6 +24739,9 @@ It contains the following chapters:
 @item
 @ref{Dynamic Extensions}.
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Advanced Features
@@ -33072,14 +33127,15 @@ If you write an extension that you wish to share with other
 @code{gawkextlib} project.
 See the project's web site for more information.
 
-@iftex
-@part Part IV:@* Appendices
-@end iftex
+@ifnotinfo
+@part @value{PART4}Appendices
+@end ifnotinfo
 
 @ifdocbook
 
-@part Appendices
-
+@docbook
+<partintro>
+@end docbook
 @ifclear FOR_PRINT
 Part IV contains the appendixes (including the two licenses that cover
 the @command{gawk} source code and this @value{DOCUMENT}, respectively)
@@ -33114,6 +33170,9 @@ Part IV contains two appendixes:
 @ref{GNU Free Documentation License}.
 @end ifclear
 @end itemize
+@docbook
+</partintro>
+@end docbook
 @end ifdocbook
 
 @node Language History