Text::FixEOL(3)

NAME
Text::FixEOL - Canonicalizes text to a specified EOL/EOF convention, repairing any 'mixed' usages

SYNOPSIS
 use Text::FixEOL;

 my $fixer = Text::FixEOL->new({ EOL     => 'platform|asis|mac|dos|unix|vms|netware|network|os2|cygwin|crlf|cr|lf|literal:$value',
                                 EOF     => 'platform|add|asis|remove|mac|dos|unix|vms|netware|cygwin|network|os2',
                                 FixLast => 'platform|yes|no|mac|dos|unix|vms|netware|network|os2|cygwin',
             });
 my $fixed_text = $fixer->fix_eol($string);

 my $mac_text     = $fixer->eol_to_mac($string);
 my $windows_text = $fixer->eol_to_dos($string);
 my $unix_text    = $fixer->eol_to_unix($string);
 my $crlf_text    = $fixer->to_crlf($string);
 my $network_text = $fixer->to_network($string);

DESCRIPTION
Converts the EOL and EOF conventions in the passed string to a canonicalization form that handles 'mixed' EOL conventions.

It canonicalizes EOL as \n (the platform defined EOL) if it does not know the particular platform. Can also 'fix' the end-of-file mark if needed and ensure that the last line of the string is EOL terminated.

CHANGES
 1.00 2005.05.02 - Initial Release

 1.01 2005.05.03 - Changes to Build.PL to have Test::NoWarnings
                   and Test::More as prerequisite modules and changes
                   to META.yml to try to make CPANPLUS happy. Small documentation
                   change to 'new'. No functional changes.

 1.02 2005.05.05 - Added more build tests and made various bug
                   fixes and tweaks. 100% code coverage for
                   tests reached. Added Test::Pod to tests.
                   Changed text in POD for licence to correctly
                   identify license as dual Artistic/GPL.

 1.03 2005.06.17 - Removed NoWarnings test to improve ability to build on
                   older installations. Added pod coverage test. Made all
                   pod tests optional. No functional changes.

 1.04 2005.09.09 - Tweaked POD build tests. Tweaked META.yml. Extended
                   license statement and appended liability disclaimer.
                   Appended Artistic and GPL licenses to distribution.
                   No functional changes.

 1.05 2005.09.13 - Changed pod tests to be more CPANTS friendly.
                   Removed usage of 'warnings' pragma  and 'our'
                   for Perl 5.005 compatibility.

 1.06 2011.07.30 - Replaced inadvertent Unicode usage in POD with non-Unicode.
                   No functional changes.

METHODS

new({ [EOL => 'platform|asis|mac|dos|unix|vms|netware|network|os2|cygwin|crlf|cr|lf|literal:$value', ] [EOF => 'platform|add|asis|remove|mac|dos|unix|vms|netware|network|os2|cygwin', ] [FixLast => 'platform|yes|no|mac|dos|unix|vms|netware|network|os2|cygwin', ] });
    Instantates a new Text::FixEOL object and (optionally) allows setting the modes of operation.

fix_eol($input);
    Converts the EOLs/EOF in the passed text to a canonicalization form. This includes fixing EOLs to the appropriate values, as well as handling EOF issues. Specifically, the presence of terminal Ctrl-Z characters (EOF) and whether or not the last line of the string is terminated with EOL (FixLast).

    When running in default mode (all setting at 'platform') on an unrecognized platform, it will attempt to convert to the local machine conventions using \n for EOL, 'remove' for EOF and 'yes' for FixLast.

    It attempts to 'Do What I Mean' (DWIM) for mixed EOL values (text where there is a mixture of differing EOL conventions such as can happen when a document is editted in more than one environment).

    Example:

       my $fixed_string = $fixer->fix_eol($string);

    The full grid of platform defaults is as follows:

                       EOL        EOF       FixLast
     unix              \012      remove       yes
     dos           \015\012        asis       yes
     windows       \015\012        asis       yes
     mswin32       \015\012        asis       yes
     mac               \015      remove       yes
     macos             \015      remove       yes
     vms           \015\012      remove       yes
     os2           \015\012        asis       yes
     netware       \015\012        asis       yes
     cygwin        \015\012        asis       yes
     network       \015\012      remove       yes

    The EOL canonicalization form is premised on the following example map which attempts to 'DWIM' for all cases of between 1 and 4 consecutive CR/LF characters. The values shown in the table are for illustrative purposes only. The actual values depend on the conversion modes specified.

      ["\012" => "\012"],
      ["\015" => "\012"],

      ["\012\015" => "\012"],
      ["\015\012" => "\012"],
      ["\015\012\015" => "\012\012"],
      ["\012\015\012" => "\012\012"],

      ["\012a\012b\012" => "\012a\012b\012"],
      ["\012a\012b\015" => "\012a\012b\012"],
      ["\012a\015b\012" => "\012a\012b\012"],
      ["\012a\015b\015" => "\012a\012b\012"],
      ["\015a\012b\012" => "\012a\012b\012"],
      ["\015a\012b\015" => "\012a\012b\012"],
      ["\015a\015b\012" => "\012a\012b\012"],
      ["\015a\015b\015" => "\012a\012b\012"],

      ["\012\015a\012\015b\012\015" => "\012a\012b\012"],
      ["\012\015a\012\015b\015"     => "\012a\012b\012"],
      ["\012\015a\015b\012\015"     => "\012a\012b\012"],
      ["\012\015a\015b\015"         => "\012a\012b\012"],
      ["\015a\012\015b\012\015"     => "\012a\012b\012"],
      ["\015a\012\015b\015"         => "\012a\012b\012"],
      ["\015a\015b\012\015"         => "\012a\012b\012"],

      ["\015\012a\015\012b\015\012" => "\012a\012b\012"],
      ["\015\012a\015\012b\015"     => "\012a\012b\012"],
      ["\015\012a\015b\015\012"     => "\012a\012b\012"],
      ["\015\012a\015b\015"         => "\012a\012b\012"],
      ["\015a\015\012b\015\012"     => "\012a\012b\012"],
      ["\015a\015\012b\015"         => "\012a\012b\012"],
      ["\015a\015b\015\012"         => "\012a\012b\012"],
      ["\015\012\015a\015\012\015b\015\012\015" => "\012\012a\012\012b\012\012"],
      ["\015\012\015a\015\012\015b\015"         => "\012\012a\012\012b\012"],
      ["\015\012\015a\015b\015\012\015"         => "\012\012a\012b\012\012"],
      ["\015\012\015a\015b\015"                 => "\012\012a\012b\012"],
      ["\015a\015\012\015b\015\012\015"         => "\012a\012\012b\012\012"],
      ["\015a\015\012\015b\015"                 => "\012a\012\012b\012"],
      ["\015a\015b\015\012\015"                 => "\012a\012b\012\012"],

      ["\012\012\012a\012\012\012b\012\012\012" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\012\012\015a\012\012\015b\012\012\015" => "\012\012a\012\012b\012\012"],
      ["\012\015\012a\012\015\012b\012\015\012" => "\012\012a\012\012b\012\012"],
      ["\012\015\015a\012\015\015b\012\015\015" => "\012\012a\012\012b\012\012"],
      ["\015\012\012a\015\012\012b\015\012\012" => "\012\012a\012\012b\012\012"],
      ["\015\012\015a\015\012\015b\015\012\015" => "\012\012a\012\012b\012\012"],
      ["\015\015\012a\015\015\012b\015\015\012" => "\012\012a\012\012b\012\012"],
      ["\015\015\015a\015\015\015b\015\015\015" => "\012\012\012a\012\012\012b\012\012\012"],

      ["\012\012\012\012a\012\012\012\012b\012\012\012\012" => "\012\012\012\012a\012\012\012\012b\012\012\012\012"],
      ["\012\012\012\015a\012\012\012\015b\012\012\012\015" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\012\012\015\012a\012\012\015\012b\012\012\015\012" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\012\012\015\015a\012\012\015\015b\012\012\015\015" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\012\015\012\012a\012\015\012\012b\012\015\012\012" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\012\015\012\015a\012\015\012\015b\012\015\012\015" => "\012\012a\012\012b\012\012"],
      ["\012\015\015\012a\012\015\015\012b\012\015\015\012" => "\012\012a\012\012b\012\012"],
      ["\012\015\015\015a\012\015\015\015b\012\015\015\015" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\015\012\012\012a\015\012\012\012b\015\012\012\012" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\015\012\012\015a\015\012\012\015b\015\012\012\015" => "\012\012a\012\012b\012\012"],
      ["\015\012\015\012a\015\012\015\012b\015\012\015\012" => "\012\012a\012\012b\012\012"],
      ["\015\012\015\015a\015\012\015\015b\015\012\015\015" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\015\015\012\012a\015\015\012\012b\015\015\012\012" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\015\015\012\015a\015\015\012\015b\015\015\012\015" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\015\015\015\012a\015\015\015\012b\015\015\015\012" => "\012\012\012a\012\012\012b\012\012\012"],
      ["\015\015\015\015a\015\015\015\015b\015\015\015\015" => "\012\012\012\012a\012\012\012\012b\012\012\012\012"],

    Additionally any Ctrl-Z (EOF) characters are processed according to the EOF setting.

eol_to_unix($string);
    Converts the passed string to Unix EOL/EOF conventions. This is equivalent to using fix_eol with

       EOL     => 'unix',
       EOF     => 'unix',
       FixLast => 'unix'

    The Unix EOL convention terminates all lines with \012. Ctrl-Z (EOF) characters at the end of the string are removed.

eol_to_dos($string);
    Converts the passed string to Windows/DOS EOL/EOF conventions This is equivalent to using fix_eol with

       EOL     => 'dos',
       EOF     => 'dos',
       FixLast => 'dos'

    The DOS EOL convention terminates all lines with \015\012. Ctrl-Z (EOF) characters at the end of the string are left alone if present.

eol_to_mac($string);
    Converts the passed string to Macintosh EOL/EOF conventions This is equivalent to using fix_eol with

       EOL     => 'mac',
       EOF     => 'mac',
       FixLast => 'mac'

    The Mac EOL convention terminates all lines with \012. Ctrl-Z (EOF) characters at the end of the string are removed.

eol_to_network($string);
    Converts the passed string to network EOL/EOF conventions. This is equivalent to using fix_eol with

       EOL     => 'network',
       EOF     => 'network',
       FixLast => 'network'

    The network EOL convention terminates all lines with \015\012. Ctrl-Z (EOF) characters at the end of the string are removed.

eol_to_crlf($string);
    Converts the passed string to CRLF format without otherwise changing it.

    This is equivalent to using fix_eol with

       EOL     => 'crlf',
       EOF     => 'asis',
       FixLast => 'no'

fix_last_handling(['platform|yes|no|mac|dos|unix|vms|netware|network|os2|cygwin']);
    Get/set accessor that specifies whether or not the last line of the string should have an EOL added if missing. Default is 'platform'.

fix_last_mode;
    Returns the current mode ('yes' or 'no') for the handling of the last line of the string (the actual 'yes'/'no' value rather than the mnemomic used for configuration).

    'yes' indicates the processor will ensure the last line is terminated with an EOL value, appending one if needed.

    'no' indicates the processor will not append a EOL if it is missing.

eol_handling(['platform|asis|mac|dos|unix|vms|netware|network|os2|cygwin|crlf|cr|lf|literal:$value']);
    Sets/gets the end-of-line character handling property. The default is 'platform'.

    The full list of supported settings is as follows:

      mac      - use Macintosh default (\015)
      macos    - use Macintosh default (\015)
      dos      - use DOS default       (\015\012)
      windows  - use DOS default       (\015\012)
      mswin32  - use DOS default       (\015\012)
      unix     - use Unix default      (\012)
      vms      - use vms default       (\015\012)
      netware  - use netware default   (\015\012)
      network  - use network default   (\015\012)
      os2      - use OS/2 default      (\015\012)
      cygwin   - use CygWin default    (\015\012)
      platform - use the current execution environment default.
      asis     - leave EOLs alone.
      crlf     - use CRLF              (\015\012)
      cr       - use CR                (\015)
      lf       - use LF                (\012)

     'literal:$value' where you replace '$value' with a string value
            instructs the converter to use the literal you specify
            for EOL.

eol_mode;
    Returns the current EOL string (the actual string value(s) for the EOL). This is the literal string value, not the mnemomic name used for configuration.

eof_handling(['platform|add|asis|remove|mac|dos|unix|vms|netware|network|os2|cygwin']);
    Specifies what is to be done with DOS end-of-file characters (control-Z).

     'add'      a Ctrl-Z (EOF) will be appended if not already present.
     'asis'     the EOF (whatever it is) will be left alone.
     'remove'   any trailing Ctrl-Z (EOF) characters will be removed.
     'platform' use the current execution environment platform's default for EOF handling.

     The platforms have the following default EOF handling behaviors:

                 EOF Handling
     unix           remove
     dos              asis
     windows          asis
     mswin32          asis
     mac            remove
     macos          remove
     vms            remove
     os2              asis
     netware          asis
     cygwin           asis
     network        remove

eof_mode;
    Returns the current EOF mode ('"asis"', '"remove"' or '"add"'). This is the actual mode rather than the mnemomic used for configuration.

COPYRIGHT
2005 Benjamin Franz <snowhare@nihongo.org>.

LICENSE
This program is free software; you can redistribute it and/or modify it under the same terms and conditions as Perl itself.

This means that you can, at your option, redistribute it and/or modify it under either the terms the GNU Public License (GPL) version 1 or later, or under the Perl Artistic License.

See http://dev.perl.org/licenses/

DISCLAIMER
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Use of this software in any way or in any form, source or binary, is not allowed in any country which prohibits disclaimers of any implied warranties of merchantability or fitness for a particular purpose or any disclaimers of a similar nature.

IN NO EVENT SHALL I BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION (INCLUDING, BUT NOT LIMITED TO, LOST PROFITS) EVEN IF I HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE

BUGS
None known.

TODO
Nothing.

VERSION
1.06 released 2011.07.30