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jrepl.bat
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jrepl.bat
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@if (@X)==(@Y) @end /* Harmless hybrid line that begins a JScript comment
@goto :Batch
::JREPL.BAT by Dave Benham
::/History
::
:: 2018-07-19 v7.13: Bug fix - /INC and /EXC regex failed to match any
:: line that immediately followed a prior block.
:: Added ADO code to create XBYTES.DAT in case CERTUTIL is
:: missing.
:: 2018-07-18 v7.12: Fixed XBYTES.DAT creation cleanup bugs, and improved docs
:: 2018-03-26 v7.11: Add support for /O "-|UTF-?|NB" (overwrite without BOM)
:: 2018-03-14 v7.10: Now can block BOM in ADO output files by appending |NB
:: to |CharSet in the /O option and OpenOutput() function.
:: 2017-11-23 v7.9: Allow escape sequences with /T "" coupled with /XSEQ
:: Added /PREPL option to augment /P behavior
:: Bug fix - Force /L when /T "" used, as per documentation
:: Bug fix - Allow /?charset/search to include non alpha
:: 2017-11-13 v7.8: Added \x{nn-mm} and \x{nn-mm,CharSet} escape sequences
:: Split /X into /XFILE and /XSEQ - /X implies both
:: Add :FILE syntax for /K and /R to load searches from file
:: Fixed /XSEQ escaped backslash bug with /INC, /EXC, AND /P
:: 2017-10-24 v7.7: Fixed broken Microsoft documentation links
:: Allow /O "-|CharSet"
:: Fixed decode(Str[,CharSet]) bug when CharSet is undefined
:: 2017-10-08 v7.6: Fixed /?Intro syntax help for /?Charset/[Query]
:: 2017-10-08 v7.5: Added /?CHARSET and /?XREGEXP web page help options
:: Added /?CHARSET/[query] List character sets help option
:: Fixed ADO output.WriteLine() to use \r\n instead of \n
:: Improved documentation: /EXC, /OFF, /U, /?HELP, decode()
:: 2017-09-25 v7.4: Modified /X \xnn extended ASCII escape sequence to support
:: any single byte character set.
:: Added /X \x{nn,Charset} escape sequence.
:: Added /XBYTES and /XBYTESOFF options.
:: Modified decode() to support the new /X \xnn behavior.
:: 2017-09-23 v7.3: Fixed /O - support for ADO input.
:: 2017-09-23 v7.2: Improved documentation of new 7.0 features.
:: Bug fix - /T FILE ADO support was broken
:: 2017-09-08 v7.1: Bug fix - v7.0 failed if Find or Replace contained )
:: 2017-09-08 v7.0: Added /XREG and /TFLAG for XRegExp regex support.
:: Added /UTF for UTF-16LE support.
:: Added /X support for the \u{N} unicode escape sequence.
:: Added |CharSet syntax for file names to allow reading
:: and writing via ADO with a specified character set.
:: Exposed the fso FileSystemObject to user JScript.
:: Augmented openOutput for Unicode and ADO support.
:: 2017-08-25 v6.8: Added /X support for the \c caret escape sequence.
:: Added /APP - append to the output file.
:: Added the openOutput(file[,appendBoolean]) function.
:: 2017-04-09 v6.7: Corrected /OFF /EXC & /INC documentation + spelling fixes.
:: 2016-12-23 v6.6: Help correction: Fixed return codes in /?RETURN section.
:: 2016-11-13 v6.5: Modify /X to consistently preserve extended ASCII.
:: New option /RTN writes result to a variable.
:: 2016-11-01 v6.4: Bug fix - v6.3 had inverted /EXC result.
:: 2016-10-13 v6.3: Improved performance by dynamically generating main loop
:: code based on chosen options.
:: 2016-10-13 v6.2: Bug fix - /J, /JQ, /JMATCH, /JMATCHQ did not work with /P.
:: 2016-10-08 v6.1: Bug fix - v6.0 broke /JBEG and /JLIB, all fixed.
:: 2016-10-08 v6.0: Added /K - search and write matching lines.
:: Added /R - search and write non-matching lines.
:: Added /MATCH - search and write each match on a new line.
:: Added /P - Pre-filter regex before normal search/replace.
:: Added /PFLAG - set search flags for /P regex
:: Added /JQ and /JMATCHQ as Quick forms of /J and /JMATCH.
:: Augmented /INC and /EXC so can now specify lines by regex.
:: Changed behavior - /V now applies to /INC and /EXC.
:: Improved performance of /INC, /EXC, /T, /JBEGLN, /JENDLN.
:: Added HISTORY and UPDATE topics to the help system.
:: 2016-09-27 v5.2: Bug fix - Search & Replace now ignore /V if /T FILE used.
:: Added a /T FILE example to the documentation.
:: 2016-09-20 v5.1: Added the FILE alternative for the /T option.
:: 2016-09-18 v5.0: Added the /U option for Unix line terminators of /n.
:: 2016-08-04 v4.6: Fixed the /N documentation (repaired missing line)
:: 2016-08-03 v4.5: Added /D option to specify delimiter for /N and /OFF.
:: 2016-08-02 v4.4: Bug fix - /C count was wrong when last line did not end
:: with new line. This also affected /INC and /EXC.
:: 2016-07-30 v4.3: Added rpad() function and improved lpad()
:: 2016-06-24 v4.2: Improved the /?Options help.
:: 2016-06-23 v4.1: Added /T option examples to the help.
:: Added ability to request help on a single option or topic.
:: 2016-06-19 v4.0: Added the /INC and /EXC options.
:: 2016-03-27 v3.8: Bug fix - Hide leaked global variables i, lib, libs, rtn2.
:: Bug fix - Work around %~f0 bug when command is quoted.
:: Bug fix - Use /OPTIONS instead of OPTIONS as a variable
:: name within the option parser so that it is unlikely to
:: collide with a user defined variable name.
:: 2016-01-14 v3.7: Reworked error handling a bit.
:: Bug fix - \xnn and \unnnn could fail in a regex search
:: if result was a meta-character and /X option was used.
:: 2015-07-15 v3.6: Added /?? option for paged help.
:: 2015-06-12 v3.5: Bug fix for $n or $nn in replace string when /T is
:: used without /J or /JMATCH or /L
:: 2015-01-22 v3.4: Bug fix - Use /TEST instead of TEST as a variable name
:: within the option parser so that it is unlikely to
:: collide with a user defined variable name.
:: 2014-12-24 v3.3: Bug fix for when /JMATCH is combined with /M or /S
:: 2014-12-09 v3.2: Bug fix for /T without /JMATCH - fixed dynamic repl func
:: Added GOTO at top for improved startup performance
:: 2014-11-25 v3.1: Added /JLIB option
:: Exception handler reports when regex is bad
:: Fix /X bug with extended ASCII
:: 2014-11-23 v3.0: Added /JBEGLN and /JENDLN options
:: Added skip, quit, and lpad() global variables/functions
:: Exception handler reports when error in user code
:: 2014-11-21 v2.2: Bug fix for /T with /L option.
:: 2014-11-20 v2.1: Bug fix for /T option when match is an empty string
:: 2014-11-17 v2.0: Added /T (translate) and /C (count input lines) options
:: 2014-11-14 v1.0: Initial release derived from REPL.BAT v6.2
::/
::============ Documentation ===========
::/INTRO
:::
:::JREPL Search Replace [/Option [Value]]...
:::JREPL /?[?][Topic|/Option|CHARSET/[Query]|HELP]
:::
::: Performs a global regular expression search and replace operation on
::: each line of ASCII input from stdin and prints the result to stdout.
:::
::: Each parameter may be optionally enclosed by double quotes. The double
::: quotes are not considered part of the argument. The quotes are required
::: if the parameter contains a batch token delimiter like space, tab, comma,
::: semicolon. The quotes should also be used if the argument contains a
::: batch special character like &, |, etc. so that the special character
::: does not need to be escaped with ^.
:::
::: Search - By default, this is a case sensitive JScript (ECMA) regular
::: expression expressed as a string.
:::
::: JScript regex syntax documentation is available at
::: https://msdn.microsoft.com/en-us/library/ae5bf541.aspx
:::
::: Replace - By default, this is the string to be used as a replacement for
::: each found search expression. Full support is provided for
::: substitution patterns available to the JScript replace method.
:::
::: For example, $& represents the portion of the source that matched
::: the entire search pattern, $1 represents the first captured
::: submatch, $2 the second captured submatch, etc. A $ literal
::: can be escaped as $$.
:::
::: An empty replacement string must be represented as "".
:::
::: Replace substitution pattern syntax is fully documented at
::: https://msdn.microsoft.com/en-US/library/efy6s3e6.aspx
:::
::: The meaning of extended ASCII byte codes >= 128 (0x80) is dependent on the
::: active code page. Extended ASCII within arguments and variables requires
::: the /XFILE option. Binary input with NULL bytes requires the /M option.
::/OPTIONS
:::
::: Options: Behavior may be altered by appending one or more options.
::: The option names are case insensitive, and may appear in any order
::: after the Replace argument.
:::
:: /A - write Altered lines only
:: /APP - Append results to the output file
:: /B - match Beginning of line
:: /C - Count number of source lines
:: /D - Delimiter for /N and /OFF
:: /E - match End of line
:: /EXC BlockList - EXClude lines from selected blocks
:: /F InFile[|CharSet[NB]]- read input from a File
:: /I - Ignore case
:: /INC BlockList - INClude lines from selected blocks
:: /J - JScript replace expressions
:: /JBEG InitCode - initialization JScript code
:: /JBEGLN NewLineCode - line initialization JScript code
:: /JEND FinalCode - finalization JScript code
:: /JENDLN EndLineCode - line finalization JScript code
:: /JLIB FileList - load file(s) of initialization code
:: /JMATCH - write matching JScript replacements only
:: /JMATCHQ - new Quick form of /JMATCH
:: /JQ - new Quick form of /J
:: /K Context or Pre:Post - search and Keep lines that match
:: /L - Literal search
:: /M - Multi-line mode
:: /MATCH - Search and print each match, one per line
:: /N MinWidth - prefix output with liNe numbers
:: /O OutFile[|CharSet[|NB]] - write Output to a file
:: /OFF MinWidth - add char OFFsets to /K, /JMATCHQ, /MATCH output
:: /P Regex - only search/replace strings that match a Regex
:: /PFLAG Flags - set the /P regex Flags to "g", "gi", "", or "i"
:: /PREPL FilterReplCode - selectively Search/Replace captured /P groups
:: /R Context or Pre:Post - search and Reject lines that match
:: /RTN ReturnVar[:Line#] - Return result in a variable
:: /S VarName - Source is read from a variable
:: /T DelimChar or FILE - Translate multiple search/replace pairs
:: /TFLAG Flags - Specify XRegExp flags for use with /T
:: /U - Unix line terminators (\n instead of \r\n)
:: /UTF - All input and output as UTF-16LE (BOM optional)
:: /V - use Variables for Search/Replace and code
:: /X - shorthand for combined /XFILE and /XSEQ
:: /XBYTES - force creation of new XBYTES.DAT
:: /XBYTESOFF - force /XSEQ \xnn to be treated as Windows-1252
:: /XFILE - preserve extended ASCII in args via temp files
:: /XREG FileList - adds XRegExp support to JREPL
:: /XSEQ - enable extended escape sequences
::/
::: /A - Only write altered lines. Unaltered lines are discarded.
::: If the /S option is used, then write the result only if
::: there was a change anywhere in the string. The /A option
::: is incompatible with the /M option unless the /S option
::: is also present.
:::
::: /APP - Modify /O behavior to Append results to the output file.
:::
::: /B - The Search must match the Beginning of a line.
::: Mostly used with literal searches.
:::
::: /C - Count the number of input lines and store the result in global
::: variable cnt. This value can be useful in JScript code associated
::: with any of the /Jxxx options.
:::
::: This option is implicitly enabled if /INC or /EXC contains a
::: negative value.
:::
::: This option is incompatible with the /M and /S options.
:::
::: If the input data is piped or redirected, then the data is first
::: written to a temporary file, so processing does not start until
::: the end-of-file is reached.
:::
::: /D Delimiter
:::
::: Specifies the Delimiter string to use after line numbers and/or
::: byte offsets that are output due to the /N or /OFF options.
::: The default value is a colon. The delimiter may be set to an
::: empty string by using /D "".
:::
::: /E - The Search must match the End of a line.
::: Mostly used with literal searches.
:::
::: /EXC BlockList
:::
::: Exclude (do not search/replace) lines that appear within at least
::: one block within BlockList. A block may be a single line, or a
::: contiguous range of lines between a start and end line. The /EXC
::: option is incompatible with /M and /S.
:::
::: The syntax for specifying a BlockList is complex. Whitespace
::: should not appear anywhere except for possibly within a Regex.
:::
::: BlockList = {Block}[,{Block}]...
::: {Block} = {SingleLine}|{LineRange}
::: {SingleLine} = {LineSpec}[{Offset}]
::: {LineRange} = {LineSpec}[{Offset}]:{EndLineSpec}[{Offset}]
::: {LineSpec} = [-]LineNumber|/Regexp/[i][/]
::: {EndLineSpec} = [-]LineNumber|+Number|/Regex/[i]
::: {Offset} = +Number|-Number
:::
::: A line may be identified by its LineNumber, or by a Regex that
::: matches the line. Once identified, a line position may be
::: adjusted forward or backward via the optional Offset.
:::
::: A negative LineNumber is counted from the end of the file.
::: So 1 is the first line of input, and -1 is the last line. The /C
::: option is automatically activated if any block identifies a line
::: via a negative line number.
:::
::: A Block Regex uses mostly standard JScript syntax, except all of
::: the escape sequences specified by the /XSEQ option are available,
::: even if the /XSEQ option has not been set. Any / literal within a
::: Regex must be escaped as \/. Each Regex may be followed by the
::: i flag, no other flags are allowed. The /I option is ignored.
:::
::: A line or range start that is identified by a regex may match
::: multiple lines within the input. Only the first matching line is
::: used if the regex is terminated by an extra / (after any i flag).
:::
::: A Line block or Range start that is identified by a Regex cannot
::: have a negative Offset.
:::
::: If the end of a Range is specified as + followed by a Number,
::: then the Number is treated as an offset from the start of the
::: Range (after any start Offset has been applied).
:::
::: If the end of a Range is specified as a regex, then the block end
::: is the first line that matches after the beginning of the block.
::: The extra / cannot be used with an end of Range regex. The Offset
::: must be greater than or equal to -1 if a regex is used. If the
::: end of Range regex is not found, then the block continues to the
::: end of file.
:::
::: Examples:
:::
::: /EXC "1:5,10,-5:-1"
::: Exclude the first 5, 10th, and last 5 lines.
:::
::: /EXC "/^:/"
::: Exclude all lines that begin with a colon
:::
::: /EXC "/^Begin$/+1:/^End$/-1"
::: Exclude all lines that are after a "Begin" line, and before
::: the next "End" line. Multiple blocks may be excluded.
:::
::: /EXC "/^DATA/i/:+10"
::: Exclude the first line that begins with DATA, ignoring case,
::: and exclude the next 10 lines as well.
:::
::: /F InFile[|CharSet|[NB]]
:::
::: Input is read from file InFile instead of stdin.
:::
::: If |CharSet (internet character set name) is appended to InFile,
::: then the file is opened via ADO using the specified CharSet value.
::: JREPL still recognizes both \n and \r\n as input line terminators
::: when using ADO. Both ADO and the CharSet must be available on the
::: local system. Appending |NB to the |CharSet normally has no impact.
::: The |NB No BOM flag is only useful when combined with /O -.
:::
::: /I - Ignore case when searching.
:::
::: /INC BlockList
:::
::: Only Include (search/replace) lines that appear within at least
::: one block within BlockList. A block may be a single line, or a
::: contiguous range of lines between a start and end line. The /INC
::: option is incompatible with /M and /S.
:::
::: A line within an /INC block is not included if it also appears
::: within an /EXC block.
:::
::: See the /EXC help for the syntax of a BlockList.
:::
::: Examples:
:::
::: /INC "1:5,10,-5:-1"
::: Include the first 5, 10th, and last 5 lines.
:::
::: /INC "/^:/"
::: Include all lines that begin with a colon
:::
::: /INC "/^Begin$/+1:/^End$/-1"
::: Include all lines that are after a "Begin" line, and before
::: the next "End" line. Multiple blocks may be included.
:::
::: /INC "/^DATA/i/:+10"
::: Include the first line that begins with DATA, ignoring case,
::: and include the next 10 lines as well.
:::
::: /J - A deprecated form of /JQ that is slow because the JScript code
::: is executed via the eval() function each and every match. This
::: form does not use $txt - The replace value is taken as the value
::: of the last JScript expression within Replace.
:::
::: This option is only preserved so as not to break existing scripts.
:::
::: /JBEG InitCode
:::
::: JScript inititialization code to run prior to loading any input.
::: This is useful for initializing user defined variables for
::: accumulating information across matches. The default code is an
::: empty string.
:::
::: /JBEGLN NewLineCode
:::
::: JScript code to run at the beginning of each line, prior to
::: performing any search on the line. The line content may be
::: manipulated via the $txt variable. The default code is an empty
::: string. This option is incompatible with the /M and /S options.
:::
::: /JEND FinalCode
:::
::: JScript termination code to run when there is no more input to
::: read. This is useful for writing summarization results.
::: The default code is an empty string.
:::
::: /JENDLN EndLineCode
:::
::: JScript code to run at the end of each line, after all matches
::: on the line have been found, but before the result is printed.
::: The final result can be modified via the $txt variable. Setting
::: $txt to false discards the line without printing. The $txt value
::: is ignored if the /JMATCH option has been used. The default
::: code is an empty string. This option is incompatible with the
::: /M and /S options.
:::
::: /JLIB FileList
:::
::: Specifies one or more files that contain libraries of JScript
::: code to load before /JBEG is run. Multiple files are delimited
::: by forward slashes (/). Useful for declaring global variables
::: and functions in a way that is reusable.
:::
::: /JMATCH - A deprecated form of /JMATCHQ that is slow because the JScript
::: code is executed via the eval() function each and every match.
::: This form does not use $txt - The replace value is taken as the
::: value of the last JScript expression within Replace.
:::
::: This option is only preserved so as not to break existing scripts.
:::
::: /JMATCHQ - Write each Replace value on a new line, discarding all text
::: that does not match the Search. The Replace argument is one or
::: more JScript statements with access to the same $ variables
::: available to the /JQ option. The code must store the final replace
::: value in variable $txt. A $txt value of false indicates the match
::: is to be ignored.
:::
::: Note the trailing Q stands for Quick :-)
:::
::: /JQ - The Replace argument is one or more JScript statements that
::: define the replacement value, and possibly do more. The code
::: must store the final replace value in variable $txt.
:::
::: The following variables contain details about each match:
:::
::: $0 is the substring that matched the Search
::: $1 through $n are the captured submatch strings
::: $off is the offset where the match occurred
::: $src is the original source string
:::
::: Note the trailing Q stands for Quick :-)
:::
::: /K PreContext:PostContext[:FILE]
::: /K Context[:FILE]
:::
::: Keep matches - Search and write out lines that contain at least
::: one match, without doing any replacement. The Replace argument is
::: still required, but is ignored.
:::
::: The integers PreContext and PostContext specify how many non-
::: matching lines to write before the match, and after the match,
::: respectively. If a single Context integer is given, then the same
::: number of non-matching lines are written before and after.
::: A Context of 0 writes only matching lines.
:::
::: If :FILE is appended to the context, then the Search parameter
::: specifies a file containing one or more search terms, one term
::: per line. A line matches if any of the search terms are found
::: witin the line. The file can be opened via ADO if |CharSet
::: (internet character set name) is appended to the file name.
::: Note: the /V option does not apply to Search if /K :FILE is used.
:::
::: /K is incompatible with /A, /J, /JQ, /JMATCH, /JMATCHQ, /M,
::: /MATCH, /R, /S, and /T.
:::
::: /L - The Search is treated as a string literal instead of a
::: regular expression. Also, all $ found in the Replace string
::: are treated as $ literals.
:::
::: /M - Multi-line mode. The entire input is read and processed in one
::: pass instead of line by line, thus enabling search for \n. This
::: also enables preservation of the original line terminators.
::: The /M option is incompatible with the /A option unless the /S
::: option is also present.
:::
::: Note: If working with binary data containing NULL bytes,
::: then the /M option must be used.
:::
::: /MATCH - Search and write out each matching string on a new line,
::: discarding any non-matching text. The Replace argument is
::: ignored, but is still required.
:::
::: /MATCH is incompatible with /A, /J, /JQ, /JMATCH, /JMATCHQ,
::: /R and /T.
:::
::: /N MinWidth
:::
::: Precede each output line with the line number of the source line,
::: followed by a delimiter (colon by default). The default delimiter
::: can be overridden with the /D option.
:::
::: Line 1 is the first line of the source.
:::
::: The MinWidth value specifies the minimum number of digits to
::: display. The default value is 0, meaning do not display the
::: line number. A value of 1 displays the line numbers without any
::: zero padding.
:::
::: The /N option is ignored if the /M or /S option is used.
:::
::: /O OutFile[|CharSet[|NB]]
:::
::: Output is written to file OutFile instead of stdout. Any existing
::: OutFile is overwritten unless the /APP option is also used.
:::
::: If |CharSet (internet character set name) is appended to OutFile,
::: then the file is opened via ADO using the specified CharSet value.
::: The output line terminator still defaults to \r\n when using ADO,
::: and may be changed to \n with the \U option. Both ADO and the
::: CharSet must be available on the local system. Unicode files
::: written by ADO have a BOM by default. Appending |NB (or |anyvalue)
::: to the CharSet blocks the BOM from being written.
:::
::: If /F InFile is also used, then an OutFile value of "-" overwrites
::: the original InFile with the output. A value of "-" preserves the
::: original input character set (and also any |NB No BOM indicator).
::: A value of "-|" explicitly transforms the file into the machine
::: default character set. A "-|CharSet[|NB]" value explicitly
::: transforms the file into the specified character set. The output
::: is first written to a temporary file with the same path and name,
::: with .new appended. Upon completion, the temp file is moved to
::: replace the InFile.
:::
::: It is rarely useful, but /APP may be combined with /O -. But /APP
::: cannot be combined with /O "-|CharSet".
:::
::: /OFF MinWidth
:::
::: Ignored unless /JMATCHQ, /JMATCH, /MATCH, or /K is used.
::: Precede each line of output with the offset of the match within
::: the original source string, followed by a delimiter (colon by
::: default). The default delimiter can be overridden with the /D
::: option. The offset follows the line number if the /N option is
::: also used.
:::
::: Offset 0 is the first character of the source string. The source
::: string is normally the current line. But if the /M option is used
::: then the source string is the entire file.
:::
::: The MinWidth value specifies the minimum number of digits to
::: display. The default value is 0, meaning do not display the
::: offset. A value of 1 displays the offsets without any zero
::: padding.
:::
::: /P FilterRegex
:::
::: Only Search/Replace strings that match the Pre-filter regular
::: expression FilterRegex. All escape sequences defined by /XSEQ are
::: available to FilterRegex, even if /XSEQ has not been set.
:::
::: FilterRegex is a global, case sensitive search by default.
::: The behavior may be changed via the /PFLAG option.
:::
::: By default, /P passes the entire matched filter string to the
::: main Search/Replace routine. If your FilterRegex includes captured
::: groups, then you can add the /PREPL option to selectively pass one
::: or more captured groups instead.
:::
::: The /P option ignores /I, but honors /M.
:::
::: The /P option may be combined with /INC and/or /EXC, in which case
::: /P is applied after lines have been included and/or excluded.
:::
::: From the standpoint of the main "Search" argument, ^ matches the
::: beginning of the matched filter, and $ matches the end of the
::: matched filter.
:::
::: Example - Substitute X for each character within curly braces,
::: including the braces.
:::
::: echo abc{xyz}def|jrepl . X /p "{.*?}"
:::
::: result:
:::
::: abcXXXXXdef
:::
::: See /PREPL for an example showing how to preserve the enclosing
::: braces.
:::
::: /PFLAG Flags
:::
::: Set the search flags to be used when defining the /P FilterRegex.
::: Possible values are:
::: "g" - global, case sensitive (default)
::: "gi" - global, ignore case
::: "" - first match only, case sensitive
::: "i" - first match only, ignore case
:::
::: If the search is not global, then the first match of each line
::: is used. If the /M option is used, then a non-global search uses
::: only the first match of the entire input.
:::
::: Note that the /P FilterRegex multiline mode is contolled by the
::: /M option. The "m" flag cannot be used with /PFLAG.
:::
::: /PREPL FilterReplaceCode
:::
::: Specify a JScript expression FilterReplaceCode that controls
::: what portion of the /P Pre-filter match is passed on to the main
::: Search/Replace routine, and what portion is preserved as-is.
:::
::: The expression is mostly standard JScript, and should evaluate to
::: a string value. $0 is the entire Pre-filter match, and $1 through
::: $N are the captured groups. The only non-standard syntax is the
::: use of curly braces to indicate what string expression gets passed
::: on to the main Search/Replace. Prior to executing the /P filter,
::: each brace expression within /PREPL is transformed as follows:
:::
::: {Expression} --> (Expression).replace(Search,Replace)
:::
::: Any JScript is allowed within /PREPL, except string literals
::: should not contain $, {, or }.
:::
::: Using /P without /PREPL is the same as using /P with /PREPL "{$0}"
:::
::: /PREPL cannot be used with /K or /R.
:::
::: Note that neither /V nor /XFILE apply to /PREPL.
:::
::: Example - Substitute X for each character within curly braces,
::: excluding the braces.
:::
::: echo abc{xyz}def|jrepl . X /p "({)(.*?)(})" /prepl "$1+{$2}+$3"
:::
::: result:
:::
::: abc{XXX}def
:::
::: /R PreContext:PostContext[:FILE]
::: /R Context[:FILE]
:::
::: Reject matches - Search and write out lines that do not contain
::: any matches, without doing any replacement. The Replace argument
::: is still required, but is ignored.
:::
::: The integers PreContext and PostContext specify how many matching
::: lines to write before the non-match, and after the non-match,
::: respectively. If a single Context integer is given, then the same
::: number of matching lines are written before and after.
::: A Context of 0 writes only non-matching lines.
:::
::: If :FILE is appended to the context, then the Search parameter
::: specifies a file containing one or more search terms, one term
::: per line. A line is rejected if any of the search terms are found
::: witin the line. The file can be opened via ADO if |CharSet
::: (internet character set name) is appended to the file name.
::: Note: the /V option does not apply to Search if /K :FILE is used.
:::
::: /R is incomptaible with /A, /J, /JQ, /JMATCH, /JMATCHQ, /K, /M,
::: /MATCH, /S, and /T.
:::
::: /RTN ReturnVar[:[-]LineNumber]
:::
::: Write the result to variable ReturnVar.
:::
::: If the optional LineNumber is present, then only that specified
::: line within the result set is returned. A LineNumber of 1 is the
::: first line. A negative LineNumber is measured from the end of the
::: result set, so -1 is the last line.
:::
::: All byte codes except NULL (0x00) are preserved, regardless
::: whether delayed expansion is enabled or not. An error is thrown
::: and no value stored if the result contains NULL.
:::
::: An error is thrown and no value stored if the value does not fit
::: within a variable. The maximum returned length varies depending
::: on the variable name and result content. The longest possible
::: returned length is 8179 bytes.
:::
::: The line terminator of the last match is suppressed if /MATCH,
::: /JMATCH, or /JMATCHQ is used.
:::
::: /S VarName
:::
::: The source is read from environment variable VarName instead
::: of from stdin. Without the /M option, ^ anchors the beginning
::: of the string, and $ the end of the string. With the /M option,
::: ^ anchors the beginning of a line, and $ the end of a line.
:::
::: The variable name must not begin with /.
:::
::: /T DelimiterChar
::: /T FILE
:::
::: The /T option is very similar to the Oracle Translate() function,
::: or the unix tr command, or the sed y command.
:::
::: The Search represents a set of search expressions, and Replace
::: is a like sized set of replacement expressions. Expressions are
::: delimited by DelimiterChar (a single character). If DelimiterChar
::: is an empty string, then each character is treated as its own
::: expression. The /L option is implicitly set if DelimiterChar is
::: empty. Normally escape sequences are interpreted after the search
::: and replace strings are split into expressions. But if the
::: DelimiterChar is empty and /XSEQ is used, then escape sequences
::: are interpreted prior to the split at every character.
:::
::: An alternate syntax is to specify the word FILE instead of a
::: DelimiterChar, in which case the Search and Replace parameters
::: specify files that contain the search and replace expressions,
::: one expression per line. Each file can be opened via ADO if
::: |CharSet (internet character set name) is appended to the file
::: name. Note that the /V option does not apply to Search and Replace
::: if /T FILE is used.
:::
::: Each substring from the input that matches a particular search
::: expression is translated into the corresponding replacement
::: expression.
:::
::: The search expressions may be regular expressions, possibly with
::: captured groups. Note that each expression is itself converted into
::: a captured group behind the scene, and the operation is performed
::: as a single search/replace upon execution. So backreferences within
::: each regex, and $n references within each replacement expression,
::: must be adjusted accordingly. The total number of expressions plus
::: captured groups must not exceed 99.
:::
::: If an expression must include a delimiter, then an escape
::: sequence must be used (not an issue if the FILE syntax is used).
:::
::: Search expressions are tested from left to right. The left most
::: matching expression takes precedence when there are multiple
::: matching expressions.
:::
::: Examples using /T:
:::
::: ROT13 - Simple character substitution is achieved by setting the
::: /T delimiter to an empty string. The search and replace strings
::: must have identical length. The use of line continuation aligns
::: the replace string directly below the search string, thus making
::: it very easy to see exactly how each character will be translated.
::: The "a" in the search string will be replaced by the "n" in the
::: replace string. And you can see the symmetry in that the "n" will
::: be replaced by "a".
:::
::: echo The quick brown fox jumps over a lazy dog | jrepl^
::: "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"^
::: "nopqrstuvwxyzabcdefghijklmNOPQRSTUVWXYZABCDEFGHIJKLM"^
::: /t ""
:::
::: -- OUTPUT --
:::
::: Gur dhvpx oebja sbk whzcf bire n ynml qbt
:::
::: Simple string substitution - The /T option specifies that string
::: expressions are delimited by a space. The /L option prevents "."
::: from being interpreted as a regex wildcard character.
:::
::: echo The blackbird flew through the blue sky. | jrepl^
::: "black blue sky ." "blue black night !" /l /t " "
:::
::: -- OUTPUT--
:::
::: The bluebird flew through the black night!
:::
::: Simple string substitution using FILE - This is the same as the
::: prior example, except now the Search and Replace strings are in
::: the following files:
:::
::: find.txt repl.txt
::: -------- --------
::: black blue
::: blue black
::: sky night
::: . !
:::
::: The following command yields the same output as before:
:::
::: echo The blackbird flew through the blue sky. | jrepl^
::: find.txt repl.txt /l /t file
:::
::: Pig Latin - This example shows how /T can be used with regular
::: expressions, and it demonstrates how the numbering of captured
::: groups must be adjusted. The /T delimiter is set to a space.
:::
::: The first regex is captured as $1, and it matches words that begin
::: with a consonant. The first captured group ($2) contains the initial
::: sequence of consonants, and the second captured group ($3) contains
::: the balance of the word. The corresponding replacement string moves
::: $2 after $3, with a "-" in between, and appends "ay".
:::
::: The second regex matches any word, and it is captured as $4 because
::: the prior regex ended with group $3. Because the first regex matched
::: all words that begin with consonants, the only thing the second
::: regex can match is a word that begins with a vowel. The replacement
::: string simply adds "-yay" to the end of $4. Note that $0 could have
::: been used instead of $4, and it would yield the same result.
:::
::: echo Can you speak Pig Latin? | jrepl^
::: "\b((?:qu(?=[aeiou])|[bcdfghj-np-twxz])+)([a-z']+)\b \b[a-z']+\b"^
::: "$3-$2ay $4-yay" /t " " /i
:::
::: -- OUTPUT --
:::
::: an-Cay you-yay eak-spay ig-Pay atin-Lay?
:::
::: Pig-Latin with proper capitalization - This is simply an extension
::: of the prior example. The /JBEG option defines a fixCaps() function
::: that checks if the translated word is all lower case, except for one
::: capital letter after the "-". If so, then the initial letter is
::: capitalized, and the remainder is converted to lower caae. The /JQ
::: option treats the replacement strings as JScript expressions. The
::: first replacement expression uses fixCaps() to properly restore case.
:::
::: echo Can you speak Pig Latin? | jrepl^
::: "\b((?:qu(?=[aeiou])|[bcdfghj-np-twxz])+)([a-z']+)\b \b[a-z']+\b"^
::: "$txt=fixCaps($3+'-'+$2+'ay') $txt=$4+'-yay'"^
::: /t " " /i /j /jbeg ^"^
::: function fixCaps(str){^
::: return str.search(/[a-z']+-[A-Z][a-z]*$/)==0 ?^
::: str.substr(0,1).toUpperCase()+str.substr(1).toLowerCase() : str^
::: }^"
:::
::: -- OUTPUT --
:::
::: An-cay you-yay eak-spay Ig-pay Atin-lay?
:::
::: /TFLAG Flags
:::
::: Used to specify XRegExp non-standard mode flags for use with /T.
::: /TFLAG is ignored unless both /T and /XREG are used.
:::
::: /U - Write lines using a Unix line terminator \n instead of Windows
::: terminator of \r\n. This has no effect if the /M option is used
::: unless /MATCH, /JMATCH, or /JMATCHQ is also used.
:::
::: Note that /U does not affect input.ReadLine or output.WriteLine
::: methods in user supplied JScript. ReadLine always accepts both
::: \r\n and \n as line terminators. And WriteLine always terminates
::: lines with \r\n.
:::
::: /UTF - All input and output encodings are Unicode UTF-16 Little
::: Endian (UTF-16LE). This includes stdin and stdout. The only
::: exceptions are /JLIB and /XREG files, which are still read
::: as ASCII.
:::
::: The \xFF\xFE BOM is optional for input.
:::
::: Output files will automatically have the \xFF\xFE BOM inserted.
::: But stdout will not have the BOM.
:::
::: Regular expression support of Unicode can be improved by using
::: the /XREG option.
:::
::: Variables are never written to temporary files (/XFILE is ignored)
::: if /UTF is used.
:::
::: Unfortunately, /UTF is incompatible with /RTN.
:::
::: /V - Search, Replace, /INC BlockList, /EXC BlockList, /P FilterRegex,
::: /JBEG InitCode, /JBEGLN NewLineCode, /JEND FinalCode, and
::: /JENDLN EndLineCode all represent the names of environment
::: variables that contain the respective values. An undefined
::: variable is treated as an empty string.
:::
::: Variable names beginning with / are reserved for option storage
::: and other internal uses. So user defined variables used with /V
::: must not have a name that begins with /.
:::
::: /X - Shorthand for combined /XFILE and /XSEQ.
:::
::: /XBYTES - Force creation of a new XBYTES.DAT file for use by the /XSEQ
::: option when decoding \xnn sequences.
:::
::: /XBYTESOFF - Force JREPL to use pre v7.4 behavior where /XSEQ \xnn is
::: always interpreted as Windows-1252.
:::
::: /XFILE - Preserves extended ASCII characters that may appear within
::: command line arguments and/or variables by first writing the
::: values to temporary files within the %TEMP% directory. Extended
::: ASCII values are byte codes >= 128 (0x80). This option is ignored
::: (no temporary files written) if /UTF is also used.
:::
::: Temporary files may be needed when the cmd.exe active code page
::: does not match the default character set used by the CSCRIPT
::: JSCRIPT engine.
:::
::: /XREG FileList
:::
::: Adds support for XRegExp by loading the xregexp files specified
::: in FileList before any /JLIB code is loaded. Multiple files are
::: delimited by forward slashes (/). If FileList is simply a dot,
::: then substitute the value of environment variable XREGEXP for
::: the FileList.
:::
::: The simplest option is to load "xregexp-all.js", but this
::: includes all available XRegExp options and addons, some of which
::: are unlikely to be useful to JREPL. Alternatively you can load
::: only the specific modules you need, but they must be loaded in the
::: correct order.
:::
::: Once the XRegExp module(s) are loaded, all user supplied regular
::: expressions are created using the XRegExp constructor rather than
::: the standard RegExp constructor. Also, XRegExp.install('natives')
::: is executed so that many standard regular expression methods are
::: overridden by XRegExp methods.
:::
::: /XREG requires XRegExp version 2.0.0 or 3.x.x. JREPL will not
::: support version 4.x.x (when it is released) because v4.x.x
::: is scheduled to drop support for XRegExp.install('natives').
:::
::: One of the key features of XRegExp is that it extends the JScript
::: regular expression syntax to support named capture groups, as in
::: (?<name>anyCapturedExpression). Named backreference syntax in
::: regular expressions is \k<name>. Named group syntax in Replace
::: strings is ${name}, and in Replace JScript code the syntax is
::: $0.name
:::
::: The /T option is no longer limited to 99 capture groups when
::: /XREG is used. However, /T replace expressions must reference a
::: captured group by name if the capture index is 100 or above.
:::
::: Every /T search expression is automatically given a capture group
::: name of Tn, where n is the 0 based index of the /T expression.
:::
::: XRegExp also adds support for non-standard mode flags:
::: n - Explicit capture
::: s - Dot matches all
::: x - Free spacing and line comments
::: A - Astral
::: These flags can generally be applied by using (?flags) syntax
::: at the begining of any regex. This is true for /P, /INC, /EXC,
::: and most Find regular expressions. The one exception is /T doesn't
::: support (?flags) at the beginning of the Find string. The /TFLAG
::: option should be used to specify XRegExp flags for use with /T.
:::
::: XRegExp also improves regular expression support for Unicode via
::: \p{Category}, \p{Script}, \p{InBlock}, \p{Property} escape
::: sequences, as well as the negated forms \P{...} and \p{^...}.
::: Note that example usage on xregexp.com shows use of doubled back
::: slashes like \\p{...}. But JREPL automatically does the doubling
::: for you, so you should use \p{...} instead.
:::
::: See xregexp.com for more information about the capabilities of
::: XRegExp, and for links to download XRegExp.
:::
::: /XSEQ - Enables extended escape sequences for both Search strings and
::: Replacement strings, with support for the following sequences:
:::
::: \\ - Backslash
::: \b - Backspace
::: \c - Caret (^)
::: \f - Formfeed
::: \n - Newline
::: \q - Quote (")
::: \r - Carriage Return
::: \t - Horizontal Tab
::: \v - Vertical Tab
::: \xnn - Extended ASCII byte code expressed as 2 hex digits nn.
::: The code is mapped to the correct Unicode code point,
::: depending on the chosen character set. If used within
::: a Find string, then the input character set is used. If
::: within a Replacement string, then the output character
::: set is used. If the selected character set is invalid or
::: not a single byte character set, then \xnn is treated as
::: a Unicode code point. Note that extended ASCII character
::: class ranges like [\xnn-\xnn] should not be used because
::: the intended range likely does not map to a contiguous
::: set of Unicode code points - use [\x{nn-mm}] instead.
::: \x{nn-mm} - A range of extended ASCII byte codes for use within
::: a regular expression character class expression. The
::: The min value nn and max value mm are expressed as hex
::: digits. The range is automatically expanded into the
::: full set of mapped Unicode code points. The character
::: set mapping rules are the same as for \xnn.
::: \x{nn,CharSet} - Same as \xnn, except explicitly uses CharSet
::: character set mapping.
::: \x{nn-mm,CharSet} - Same as \x{nn-mm}, except explicitly uses
::: CharSet character set mapping.
::: \unnnn - Unicode code point expressed as 4 hex digits nnnn.
::: \u{N} - Any Unicode code point where N is 1 to 6 hex digits
:::
::: JREPL automatically creates an XBYTES.DAT file containing all 256
::: possible byte codes. The XBYTES.DAT file is preferentially created
::: in "%ALLUSERSPROFILE%\JREPL\" if at all possible. Otherwise the
::: file is created in "%TEMP%\JREPL\" instead. JREPL uses the file
::: to establish the correct \xnn byte code mapping for each character
::: set. Once created, successive runs reuse the same XBYTES.DAT file.
::: If the file gets corrupted, then use the /XBYTES option to force
::: creation of a new XBYTES.DAT file. If JREPL cannot create the file
::: for any reason, then JREPL silently defaults to using pre v7.4
::: behavior where /XSEQ \xnn is interpreted as Windows-1252. Creation
::: of XBYTES.DAT requires either CERTUTIL.EXE or ADO. It is possible
::: that both may be missing from an XP machine.
:::
::: Without the /XSEQ option, only standard JSCRIPT escape sequences
::: \\, \b, \f, \n, \r, \t, \v, \xnn, \unnnn are available for the
::: search strings. And the \xnn sequence represents a unicode
::: code point, not extended ASCII.
:::
::: Extended escape sequences are supported even when the /L option
::: is used. Both Search and Replace support all of the extended
::: escape sequences if both the /XSEQ and /L options are combined.
:::
::: Extended escape sequences are not applied to JScript code when
::: using any of the /Jxxx options. Use the decode() function if
::: extended escape sequences are needed within the code.
:::
::/JSCRIPT
:::
::: The following global JScript variables/objects/functions are available for
::: use in JScript code associated with the /Jxxx options. User code may safely
::: declare additional variables/objects/functions because all other internal
::: objects used by JREPL are hidden behind an opaque _g object.
:::
::: ln - Within /JBEGLN, /JENDLN, and Replace code = current line number
::: Within /JBEG code = 0
::: Within /JEND code = total number of lines read.
::: This value is always 0 if the /M or /S option is used.
:::
::: cnt - The total number of lines in the input. The value is undefined
::: unless the /C option is used.
:::
::: skip - If true, do not search/replace any more lines until the value
::: becomes false. /JBEGLN and /JENDLN code are still executed for
::: each line, regardless. If set to true while in the midst of
::: searching a line, then that search will continue to the end of
::: the current line.
:::
::: The default value is false.
:::
::: This variable has no impact if the /M or /S options is used.
:::
::: Note that this variable operates independently of the /INC
::: and /EXC options.
:::
::: quit - If true, then do not read any more lines of input. The current
::: line is still processed to completion, and /JEND code is still
::: executed afterward.