Document more about sprintf %c.

4 files changed, 438 insertions, 427 deletions

diff --git a/doc/ChangeLog b/doc/ChangeLog
index 43646426..1b71b0ed 100644
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@ -1,3 +1,8 @@
+2014-08-03         Arnold D. Robbins     <arnold@skeeve.com>
+
+	* gawktexi.in: For sprintf %c document that if value is a valid
+	wide character, gawk uses the low 8 bits of the value.
+
 2014-07-04         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* gawktexi.in (Bracket Expressions): Add a note about how to
diff --git a/doc/gawk.info b/doc/gawk.info
index 8b5e572f..e1b07c80 100644
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@ -6282,7 +6282,9 @@ width.  Here is a list of the format-control letters:
           valid wide character and then to print the multibyte encoding
           of that character.  Similarly, when printing a numeric value,
           `gawk' allows the value to be within the numeric range of
-          values that can be held in a wide character.
+          values that can be held in a wide character.  If the
+          conversion to multibyte encoding fails, `gawk' uses the low
+          eight bits of the value as the character to print.
 
           Other `awk' versions generally restrict themselves to printing
           the first byte of a string or to numeric values within the
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+Ref: Explaining gettext-Footnote-2803408
+Node: Programmer i18n803573
+Node: Translator i18n807798
+Node: String Extraction808592
+Ref: String Extraction-Footnote-1809553
+Node: Printf Ordering809639
+Ref: Printf Ordering-Footnote-1812421
+Node: I18N Portability812485
+Ref: I18N Portability-Footnote-1814934
+Node: I18N Example814997
+Ref: I18N Example-Footnote-1817719
+Node: Gawk I18N817791
+Node: I18N Summary818429
+Node: Debugger819768
+Node: Debugging820790
+Node: Debugging Concepts821231
+Node: Debugging Terms823087
+Node: Awk Debugging825684
+Node: Sample Debugging Session826576
+Node: Debugger Invocation827096
+Node: Finding The Bug828429
+Node: List of Debugger Commands834911
+Node: Breakpoint Control836243
+Node: Debugger Execution Control839907
+Node: Viewing And Changing Data843267
+Node: Execution Stack846625
+Node: Debugger Info848138
+Node: Miscellaneous Debugger Commands852132
+Node: Readline Support857316
+Node: Limitations858208
+Node: Debugging Summary860482
+Node: Arbitrary Precision Arithmetic861646
+Node: Computer Arithmetic862975
+Ref: Computer Arithmetic-Footnote-1867362
+Node: Math Definitions867419
+Ref: table-ieee-formats870303
+Node: MPFR features870807
+Node: FP Math Caution872449
+Ref: FP Math Caution-Footnote-1873490
+Node: Inexactness of computations873859
+Node: Inexact representation874807
+Node: Comparing FP Values876162
+Node: Errors accumulate877126
+Node: Getting Accuracy878559
+Node: Try To Round881218
+Node: Setting precision882117
+Ref: table-predefined-precision-strings882799
+Node: Setting the rounding mode884592
+Ref: table-gawk-rounding-modes884956
+Ref: Setting the rounding mode-Footnote-1888410
+Node: Arbitrary Precision Integers888589
+Ref: Arbitrary Precision Integers-Footnote-1891592
+Node: POSIX Floating Point Problems891741
+Ref: POSIX Floating Point Problems-Footnote-1895617
+Node: Floating point summary895655
+Node: Dynamic Extensions897872
+Node: Extension Intro899424
+Node: Plugin License900689
+Node: Extension Mechanism Outline901374
+Ref: figure-load-extension901798
+Ref: figure-load-new-function903283
+Ref: figure-call-new-function904285
+Node: Extension API Description906269
+Node: Extension API Functions Introduction907719
+Node: General Data Types912584
+Ref: General Data Types-Footnote-1918277
+Node: Requesting Values918576
+Ref: table-value-types-returned919313
+Node: Memory Allocation Functions920271
+Ref: Memory Allocation Functions-Footnote-1923018
+Node: Constructor Functions923114
+Node: Registration Functions924872
+Node: Extension Functions925557
+Node: Exit Callback Functions927859
+Node: Extension Version String929108
+Node: Input Parsers929758
+Node: Output Wrappers939561
+Node: Two-way processors944077
+Node: Printing Messages946281
+Ref: Printing Messages-Footnote-1947358
+Node: Updating `ERRNO'947510
+Node: Accessing Parameters948249
+Node: Symbol Table Access949479
+Node: Symbol table by name949993
+Node: Symbol table by cookie951969
+Ref: Symbol table by cookie-Footnote-1956102
+Node: Cached values956165
+Ref: Cached values-Footnote-1959669
+Node: Array Manipulation959760
+Ref: Array Manipulation-Footnote-1960858
+Node: Array Data Types960897
+Ref: Array Data Types-Footnote-1963600
+Node: Array Functions963692
+Node: Flattening Arrays967566
+Node: Creating Arrays974418
+Node: Extension API Variables979149
+Node: Extension Versioning979785
+Node: Extension API Informational Variables981686
+Node: Extension API Boilerplate982772
+Node: Finding Extensions986576
+Node: Extension Example987136
+Node: Internal File Description987866
+Node: Internal File Ops991957
+Ref: Internal File Ops-Footnote-11003389
+Node: Using Internal File Ops1003529
+Ref: Using Internal File Ops-Footnote-11005876
+Node: Extension Samples1006144
+Node: Extension Sample File Functions1007668
+Node: Extension Sample Fnmatch1015236
+Node: Extension Sample Fork1016718
+Node: Extension Sample Inplace1017931
+Node: Extension Sample Ord1019606
+Node: Extension Sample Readdir1020442
+Ref: table-readdir-file-types1021298
+Node: Extension Sample Revout1022097
+Node: Extension Sample Rev2way1022688
+Node: Extension Sample Read write array1023429
+Node: Extension Sample Readfile1025308
+Node: Extension Sample API Tests1026408
+Node: Extension Sample Time1026933
+Node: gawkextlib1028248
+Node: Extension summary1031061
+Node: Extension Exercises1034754
+Node: Language History1035476
+Node: V7/SVR3.11037119
+Node: SVR41039439
+Node: POSIX1040881
+Node: BTL1042267
+Node: POSIX/GNU1043001
+Node: Feature History1048600
+Node: Common Extensions1061730
+Node: Ranges and Locales1063042
+Ref: Ranges and Locales-Footnote-11067659
+Ref: Ranges and Locales-Footnote-21067686
+Ref: Ranges and Locales-Footnote-31067920
+Node: Contributors1068141
+Node: History summary1073566
+Node: Installation1074935
+Node: Gawk Distribution1075886
+Node: Getting1076370
+Node: Extracting1077194
+Node: Distribution contents1078836
+Node: Unix Installation1084553
+Node: Quick Installation1085170
+Node: Additional Configuration Options1087612
+Node: Configuration Philosophy1089350
+Node: Non-Unix Installation1091701
+Node: PC Installation1092159
+Node: PC Binary Installation1093470
+Node: PC Compiling1095318
+Ref: PC Compiling-Footnote-11098317
+Node: PC Testing1098422
+Node: PC Using1099598
+Node: Cygwin1103756
+Node: MSYS1104565
+Node: VMS Installation1105079
+Node: VMS Compilation1105875
+Ref: VMS Compilation-Footnote-11107097
+Node: VMS Dynamic Extensions1107155
+Node: VMS Installation Details1108528
+Node: VMS Running1110780
+Node: VMS GNV1113614
+Node: VMS Old Gawk1114337
+Node: Bugs1114807
+Node: Other Versions1118811
+Node: Installation summary1125066
+Node: Notes1126122
+Node: Compatibility Mode1126987
+Node: Additions1127769
+Node: Accessing The Source1128694
+Node: Adding Code1130130
+Node: New Ports1136308
+Node: Derived Files1140789
+Ref: Derived Files-Footnote-11145870
+Ref: Derived Files-Footnote-21145904
+Ref: Derived Files-Footnote-31146500
+Node: Future Extensions1146614
+Node: Implementation Limitations1147220
+Node: Extension Design1148468
+Node: Old Extension Problems1149622
+Ref: Old Extension Problems-Footnote-11151139
+Node: Extension New Mechanism Goals1151196
+Ref: Extension New Mechanism Goals-Footnote-11154556
+Node: Extension Other Design Decisions1154745
+Node: Extension Future Growth1156851
+Node: Old Extension Mechanism1157687
+Node: Notes summary1159449
+Node: Basic Concepts1160635
+Node: Basic High Level1161316
+Ref: figure-general-flow1161588
+Ref: figure-process-flow1162187
+Ref: Basic High Level-Footnote-11165416
+Node: Basic Data Typing1165601
+Node: Glossary1168929
+Node: Copying1194081
+Node: GNU Free Documentation License1231637
+Node: Index1256773
 
 End Tag Table
diff --git a/doc/gawk.texi b/doc/gawk.texi
index c6520ba3..ab98dda3 100644
--- a/doc/gawk.texi
+++ b/doc/gawk.texi
@@ -9029,6 +9029,8 @@ and then to print the multibyte encoding of that character.
 Similarly, when printing a numeric value, @command{gawk} allows the
 value to be within the numeric range of values that can be held
 in a wide character.
+If the conversion to multibyte encoding fails, @command{gawk}
+uses the low eight bits of the value as the character to print.
 
 Other @command{awk} versions generally restrict themselves to printing
 the first byte of a string or to numeric values within the range of
diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index d485a50d..7039325b 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -8648,6 +8648,8 @@ and then to print the multibyte encoding of that character.
 Similarly, when printing a numeric value, @command{gawk} allows the
 value to be within the numeric range of values that can be held
 in a wide character.
+If the conversion to multibyte encoding fails, @command{gawk}
+uses the low eight bits of the value as the character to print.
 
 Other @command{awk} versions generally restrict themselves to printing
 the first byte of a string or to numeric values within the range of