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Diffstat (limited to 'doc/gawk.info')
| -rw-r--r-- | doc/gawk.info | 1032 |
1 files changed, 519 insertions, 513 deletions
diff --git a/doc/gawk.info b/doc/gawk.info index 9c4ce333..29051f64 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -4281,6 +4281,12 @@ Another predefined variable, 'NR', records the total number of input records read so far from all data files. It starts at zero, but is never automatically reset to zero. + Normally, records are separated by newline characters. You can +control how records are separated by assigning values to the built-in +variable 'RS'. If 'RS' is any single character, that character +separates records. Otherwise (in 'gawk'), 'RS' is treated as a regular +expression. This mechanism is explained in greater detail shortly. + * Menu: * awk split records:: How standard 'awk' splits records. @@ -4427,15 +4433,15 @@ File: gawk.info, Node: gawk split records, Prev: awk split records, Up: Recor ---------------------------------- When using 'gawk', the value of 'RS' is not limited to a one-character -string. It can be any regular expression (*note Regexp::). (c.e.) In -general, each record ends at the next string that matches the regular -expression; the next record starts at the end of the matching string. -This general rule is actually at work in the usual case, where 'RS' -contains just a newline: a record ends at the beginning of the next -matching string (the next newline in the input), and the following -record starts just after the end of this string (at the first character -of the following line). The newline, because it matches 'RS', is not -part of either record. +string. If it contains more than one character, it is treated as a +regular expression (*note Regexp::). (c.e.) In general, each record +ends at the next string that matches the regular expression; the next +record starts at the end of the matching string. This general rule is +actually at work in the usual case, where 'RS' contains just a newline: +a record ends at the beginning of the next matching string (the next +newline in the input), and the following record starts just after the +end of this string (at the first character of the following line). The +newline, because it matches 'RS', is not part of either record. When 'RS' is a single character, 'RT' contains the same single character. However, when 'RS' is a regular expression, 'RT' contains @@ -36111,509 +36117,509 @@ Ref: Case-sensitivity-Footnote-2192147 Node: Regexp Summary192255 Node: Reading Files193721 Node: Records195990 -Node: awk split records196723 -Node: gawk split records201998 -Ref: gawk split records-Footnote-1206538 -Node: Fields206575 -Node: Nonconstant Fields209316 -Ref: Nonconstant Fields-Footnote-1211552 -Node: Changing Fields211756 -Node: Field Separators217684 -Node: Default Field Splitting220382 -Node: Regexp Field Splitting221500 -Node: Single Character Fields224853 -Node: Command Line Field Separator225913 -Node: Full Line Fields229131 -Ref: Full Line Fields-Footnote-1230653 -Ref: Full Line Fields-Footnote-2230699 -Node: Field Splitting Summary230800 -Node: Constant Size232874 -Node: Fixed width data233606 -Node: Skipping intervening237073 -Node: Allowing trailing data237871 -Node: Fields with fixed data238908 -Node: Splitting By Content240426 -Ref: Splitting By Content-Footnote-1244076 -Node: Testing field creation244239 -Node: Multiple Line245864 -Ref: Multiple Line-Footnote-1251748 -Node: Getline251927 -Node: Plain Getline254396 -Node: Getline/Variable257037 -Node: Getline/File258188 -Node: Getline/Variable/File259576 -Ref: Getline/Variable/File-Footnote-1261181 -Node: Getline/Pipe261269 -Node: Getline/Variable/Pipe263976 -Node: Getline/Coprocess265111 -Node: Getline/Variable/Coprocess266378 -Node: Getline Notes267120 -Node: Getline Summary269917 -Ref: table-getline-variants270341 -Node: Read Timeout271089 -Ref: Read Timeout-Footnote-1274995 -Node: Retrying Input275053 -Node: Command-line directories276252 -Node: Input Summary277158 -Node: Input Exercises280330 -Node: Printing281058 -Node: Print282892 -Node: Print Examples284349 -Node: Output Separators287129 -Node: OFMT289146 -Node: Printf290502 -Node: Basic Printf291287 -Node: Control Letters292861 -Node: Format Modifiers297540 -Node: Printf Examples303555 -Node: Redirection306041 -Node: Special FD312882 -Ref: Special FD-Footnote-1316050 -Node: Special Files316124 -Node: Other Inherited Files316741 -Node: Special Network317742 -Node: Special Caveats318602 -Node: Close Files And Pipes319551 -Ref: table-close-pipe-return-values326458 -Ref: Close Files And Pipes-Footnote-1327271 -Ref: Close Files And Pipes-Footnote-2327419 -Node: Nonfatal327571 -Node: Output Summary329909 -Node: Output Exercises331131 -Node: Expressions331810 -Node: Values332998 -Node: Constants333676 -Node: Scalar Constants334367 -Ref: Scalar Constants-Footnote-1335231 -Node: Nondecimal-numbers335481 -Node: Regexp Constants338482 -Node: Using Constant Regexps339008 -Node: Standard Regexp Constants339630 -Node: Strong Regexp Constants342818 -Node: Variables345776 -Node: Using Variables346433 -Node: Assignment Options348343 -Node: Conversion350216 -Node: Strings And Numbers350740 -Ref: Strings And Numbers-Footnote-1353803 -Node: Locale influences conversions353912 -Ref: table-locale-affects356670 -Node: All Operators357288 -Node: Arithmetic Ops357917 -Node: Concatenation360423 -Ref: Concatenation-Footnote-1363270 -Node: Assignment Ops363377 -Ref: table-assign-ops368368 -Node: Increment Ops369681 -Node: Truth Values and Conditions373141 -Node: Truth Values374215 -Node: Typing and Comparison375263 -Node: Variable Typing376083 -Ref: Variable Typing-Footnote-1382546 -Ref: Variable Typing-Footnote-2382618 -Node: Comparison Operators382695 -Ref: table-relational-ops383114 -Node: POSIX String Comparison386609 -Ref: POSIX String Comparison-Footnote-1388304 -Ref: POSIX String Comparison-Footnote-2388443 -Node: Boolean Ops388527 -Ref: Boolean Ops-Footnote-1393009 -Node: Conditional Exp393101 -Node: Function Calls394837 -Node: Precedence398714 -Node: Locales402373 -Node: Expressions Summary404005 -Node: Patterns and Actions406578 -Node: Pattern Overview407698 -Node: Regexp Patterns409375 -Node: Expression Patterns409917 -Node: Ranges413698 -Node: BEGIN/END416806 -Node: Using BEGIN/END417567 -Ref: Using 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Controlling Scanning-Footnote-1506207 -Node: Numeric Array Subscripts506523 -Node: Uninitialized Subscripts508707 -Node: Delete510326 -Ref: Delete-Footnote-1513078 -Node: Multidimensional513135 -Node: Multiscanning516230 -Node: Arrays of Arrays517821 -Node: Arrays Summary522588 -Node: Functions524681 -Node: Built-in525719 -Node: Calling Built-in526800 -Node: Numeric Functions528796 -Ref: Numeric Functions-Footnote-1532824 -Ref: Numeric Functions-Footnote-2533181 -Ref: Numeric Functions-Footnote-3533229 -Node: String Functions533501 -Ref: String Functions-Footnote-1557210 -Ref: String Functions-Footnote-2557338 -Ref: String Functions-Footnote-3557586 -Node: Gory Details557673 -Ref: table-sub-escapes559464 -Ref: table-sub-proposed560983 -Ref: table-posix-sub562346 -Ref: table-gensub-escapes563887 -Ref: Gory Details-Footnote-1564710 -Node: I/O Functions564864 -Ref: table-system-return-values571332 -Ref: I/O Functions-Footnote-1573312 -Ref: I/O Functions-Footnote-2573460 -Node: Time 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