text::tabs5.18(3pm) [mojave man page]

Text::Tabs(3pm) 					 Perl Programmers Reference Guide					   Text::Tabs(3pm)

NAME

       Text::Tabs - expand and unexpand tabs like unix expand(1) and unexpand(1)

SYNOPSIS

	 use Text::Tabs;

	 $tabstop = 4;	# default = 8
	 @lines_without_tabs = expand(@lines_with_tabs);
	 @lines_with_tabs = unexpand(@lines_without_tabs);

DESCRIPTION

       Text::Tabs does most of what the unix utilities expand(1) and unexpand(1) do.  Given a line with tabs in it, "expand" replaces those tabs
       with the appropriate number of spaces.  Given a line with or without tabs in it, "unexpand" adds tabs when it can save bytes by doing so,
       like the "unexpand -a" command.

       Unlike the old unix utilities, this module correctly accounts for any Unicode combining characters (such as diacriticals) that may occur in
       each line for both expansion and unexpansion.  These are overstrike characters that do not increment the logical position.  Make sure you
       have the appropriate Unicode settings enabled.

EXPORTS

       The following are exported:

       expand
       unexpand
       $tabstop
	   The $tabstop variable controls how many column positions apart each tabstop is.  The default is 8.

	   Please note that "local($tabstop)" doesn't do the right thing and if you want to use "local" to override $tabstop, you need to use
	   "local($Text::Tabs::tabstop)".

EXAMPLE

	 #!perl
	 # unexpand -a
	 use Text::Tabs;

	 while (<>) {
	   print unexpand $_;
	 }

       Instead of the shell's "expand" comand, use:

	 perl -MText::Tabs -n -e 'print expand $_'

       Instead of the shell's "unexpand -a" command, use:

	 perl -MText::Tabs -n -e 'print unexpand $_'

SUBVERSION

       This module comes in two flavors: one for modern perls (5.10 and above) and one for ancient obsolete perls.  The version for modern perls
       has support for Unicode.  The version for old perls does not.  You can tell which version you have installed by looking at
       $Text::Tabs::SUBVERSION: it is "old" for obsolete perls and "modern" for current perls.

       This man page is for the version for modern perls and so that's probably what you've got.

BUGS

       Text::Tabs handles only tabs ("	") and combining characters ("/pM/").	It doesn't count backwards for backspaces ("	"), omit other non-
       printing control characters ("/pC/"), or otherwise deal with any other zero-, half-, and full-width characters.

LICENSE

       Copyright (C) 1996-2002,2005,2006 David Muir Sharnoff.  Copyright (C) 2005 Aristotle Pagaltzis Copyright (C) 2012 Google, Inc.  This module
       may be modified, used, copied, and redistributed at your own risk.  Publicly redistributed modified versions must use a different name.

perl v5.18.2							    2014-01-06							   Text::Tabs(3pm)

expand(1)						      General Commands Manual							 expand(1)

NAME

       expand, unexpand - Replaces tab characters with spaces or spaces with tab characters

SYNOPSIS

   Current syntax
       expand [-t tablist] [file...]

       unexpand [-a  | -t tablist] [file...]

   Obsolescent syntax
       expand [-tabstop  | -tab1,tab2,...,tabn] [file...]

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       expand:	XCU5.0

       unexpand:  XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       Replaces  spaces at the beginning of each line with a tab, and inserts tab characters wherever their presence compresses the resultant file
       by replacing two or more characters.  When the -t option is specified with the unexpand command, the -a option has no effect.  (This option
       applies	to  the  unexpand  command only.)  Specifies the tab stops.  The tablist argument consists of a single positive decimal integer or
       multiple positive decimal integers, separated by spaces or commas, in ascending order. If a single number is specified, tabs are  set  tab-
       list  column  positions	apart  instead of the default (8).  If multiple numbers are specified, tabs are set at those specific column posi-
       tions.  Tabbing to tab stop position n thus causes the next character output to be in the (n+1)th column position on that line.

	      If expand has to process a tab character at a position beyond the last of those specified in a multiple tab stop list, the tab char-
	      acter  is  replaced by a single space in the output.  Sets tab stops tabstop spaces apart instead of the default (8).  (Obsolescent)
	      Sets tab stops at specified columns.  (Obsolescent)

	      [Tru64 UNIX]  Columns are measured in bytes.

OPERANDS

       The path name of a file to be processed.  If you do not specify this operand, standard input is read.

DESCRIPTION

       The expand command changes tab characters to spaces in the named files, or the standard input, and writes the result to the  standard  out-
       put.

       The  unexpand  command puts tab characters into the data from the standard input, or the named files, and writes the result to the standard
       output.

       Backspace characters are preserved in the output and decrement the column count for tab calculations. The column position count	cannot	be
       decremented  below one. The expand command is useful for preprocessing character files (before sorting, looking at specific columns, and so
       on.)  that contain tab characters.

       By default, unexpand converts only spaces that are within sequences of spaces and tab characters at the beginnings of  lines.   Use  -a	to
       convert other sequences of spaces.

NOTES

       If the expand command encounters difficulties opening any specified file, it writes an error message to standard error and terminates imme-
       diately with an error status.

       If the unexpand command encounters difficulties opening any specified file, it writes an error message  to  standard  error  and  continues
       operation.  The exit status will reflect the error.

EXIT STATUS

       The following exit values are returned by either command: Successful completion.  An error occurred.

EXAMPLES

       To  replace  tab  characters  in file with spaces, enter: expand file To replace the spaces in file with tab characters, enter: unexpand -a
       file

ENVIRONMENT VARIABLES

       The following environment variables affect the execution of expand and unexpand: Provides a  default  value  for  the  internationalization
       variables  that are unset or null. If LANG is unset or null, the corresponding value from the default locale is used.  If any of the inter-
       nationalization variables contain an invalid setting, the utility behaves as if none of the variables had been defined.	If set to  a  non-
       empty  string value, overrides the values of all the other internationalization variables.  Determines the locale for the interpretation of
       sequences of bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments).   Determines  the
       locale for the format and contents of diagnostic messages written to standard error.  Determines the location of message catalogues for the
       processing of LC_MESSAGES.

SEE ALSO

       Commands:  fold(1), tabs(1)

       Standards:  standards(5)

																	 expand(1)