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Docs::Site_SVD::File_SmartNL(3)





NAME

       Docs::Site_SVD::File_SmartNL - translates any combination of CR and NL
       to the site \nl


Title Page

        Software Version Description

        for

        Docs::Site_SVD::File_SmartNL - translates any combination of CR and NL to the site \nl

        Revision: D

        Version: 0.05

        Date: 2004/05/13

        Prepared for: General Public

        Prepared by:  SoftwareDiamonds.com E<lt>support@SoftwareDiamonds.comE<gt>

        Copyright: copyright  2003 Software Diamonds

        Classification: NONE


1.0 SCOPE

       This paragraph identifies and provides an overview of the released
       files.

       1.1 Identification

       This release, identified in 3.2, is a collection of Perl modules that
       extend the capabilities of the Perl language.

       1.2 System overview

       Different operating systems have different sequences for new-lines.
       Historically when computers where first being born, one of the main-
       stays was the teletype.  The teletype understood ASCII.  The teletype
       was an automated typewriter that would perform a carriage return when
       it received an ASCII Carriage Return (CR), \015,  character and a new
       line when it received a Line Feed (LF), \012 character.

       After some time came Unix. Unix had a tty driver that had a raw mode
       that sent data unprocessed to a teletype and a cooked mode that per-
       formed all kinds of translations and manipulations. Unix stored data
       internally using a single NL character at the ends of lines. The tty
       driver in the cooked mode would translate the NL character to a CR,LF
       sequence.  When driving a teletype, the physicall action of performing
       a carriage return took some time. By always putting the CR before the
       LF, the teletype would actually still be performing a carriage return
       when it received the LF and started a line feed.

       After some time came DOS. Since the tty driver is actually one of the
       largest peices of code for UNIX and DOS needed to run in very cramp
       space, the DOS designers decided, that instead of writing a tailored
       down tty driver, they would stored a CR,LF in the internal memory. Data
       internally would be either 'text' data or 'binary' data.

       Needless to say, after many years and many operating systems about
       every conceivable method of storing new lines may be found amoung the
       various operating systems.  This greatly complicates moving files from
       one operating system to another operating system.

       The smart NL methods in this package are designed to take any combina-
       tion of CR and NL and translate it into the special NL seqeunce used on
       the site operating system. Thus, by using these methods, the messy
       problem of moving files between operating systems is mostly hidden in
       these methods.  The one thing not hidden is that the methods need to
       know if the data is 'text' data or 'binary' data. Normally, the assume
       the data is 'text' and are overriden by setting the 'binary' option.

       Note that Perl 5.6 introduced a built-in smart nl functionality as an
       IO discipline :crlf.  See Programming Perl by Larry Wall, Tom Chris-
       tiansen and Jon Orwant, page 754, Chapter 29: Functions, open function.
       For Perl 5.6 or above, the :crlf IO discipline may be preferable over
       the smart_nl method of this package.  However, when moving code from
       one operating system to another system, there will be target operating
       systems for the near and probable far future that have not upgraded to
       Perl 5.6.

       1.3 Document overview.

       This document releases File::SmartNL version 0.05 providing a descrip-
       tion of the inventory, installation instructions and other information
       necessary to utilize and track this release.


3.0 VERSION DESCRIPTION

       All file specifications in this SVD use the Unix operating system file
       specification.

       3.1 Inventory of materials released.

       This document releases the file

        File-SmartNL-0.05.tar.gz

       found at the following repository(s):

         http://www.softwarediamonds/packages/
         http://www.perl.com/CPAN/authors/id/S/SO/SOFTDIA/

       Restrictions regarding duplication and license provisions are as fol-
       lows:

       Copyright.
           copyright  2003 Software Diamonds

       Copyright holder contact.
            603 882-0846 E<lt>support@SoftwareDiamonds.comE<gt>

       License.
           Software Diamonds permits the redistribution and use in source and
           binary forms, with or without modification, provided that the fol-
           lowing conditions are met:

           1   Redistributions of source code, modified or unmodified must
               retain the above copyright notice, this list of conditions and
               the following disclaimer.

           2   Redistributions in binary form must reproduce the above copy-
               right notice, this list of conditions and the following dis-
               claimer in the documentation and/or other materials provided
               with the distribution.

           3   Commercial installation of the binary or source must visually
               present to the installer the above copyright notice, this list
               of conditions intact, that the original source is available at
               http://softwarediamonds.com and provide means for the installer
               to actively accept the list of conditions; otherwise, a license
               fee must be paid to Softwareware Diamonds.

           SOFTWARE DIAMONDS, http://www.SoftwareDiamonds.com, PROVIDES THIS
           SOFTWARE 'AS IS' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
           BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
           FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
           SOFTWARE DIAMONDS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
           SPECIAL,EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
           LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
           USE,DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
           ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
           OR TORT (INCLUDING USE OF THIS SOFTWARE, EVEN IF ADVISED OF NEGLI-
           GENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE POSSIBILITY OF
           SUCH DAMAGE.

       3.2 Inventory of software contents

       The content of the released, compressed, archieve file, consists of the
       following files:

        file                                                         version date       comment
        ------------------------------------------------------------ ------- ---------- ------------------------
        lib/Docs/Site_SVD/File_SmartNL.pm                            0.05    2004/05/13 revised 0.04
        MANIFEST                                                     0.05    2004/05/13 generated, replaces 0.04
        Makefile.PL                                                  0.05    2004/05/13 generated, replaces 0.04
        README                                                       0.05    2004/05/13 generated, replaces 0.04
        lib/File/SmartNL.pm                                          1.16    2004/05/13 revised 1.14
        t/File/SmartNL.d                                             0.01    2004/05/03 unchanged
        t/File/SmartNL.pm                                            0.01    2004/05/03 unchanged
        t/File/SmartNL.t                                             0.11    2004/05/13 revised 0.1
        t/File/File/Package.pm                                       1.17    2004/05/13 revised 1.16
        t/File/Test/Tech.pm                                          1.25    2004/05/13 revised 1.22
        t/File/Data/Secs2.pm                                         1.23    2004/05/13 revised 1.19
        t/File/Data/SecsPack.pm                                      0.08    2004/05/13 revised 0.04
        t/File/Data/Startup.pm                                       0.06    2004/05/13 revised 0.04

       3.3 Changes

       Changes are as follows:

       Test-TestUtil-0.01
           Originated

       Test-TestUtil-0.02
           Correct failure from Josts Smokehouse" <Jost.Krieger+smoke-
           back@ruhr-uni-bochum.de> test run

           t/Test/TestUtil/TestUtil....Bareword "fspec_dirs" not allowed while
           "strict subs" in use at

             /net/sunu991/disc1/.cpanplus/5.8.0/build/Test-TestUtil-0.01/blib/lib/Test/TestUtil.pm line 56.

           Changed line 56 from

            my @dirs = (fspec_dirs) ? $from_package->splitdir( $fspec_dirs ) : ();

           to

            my @dirs = ($fspec_dirs) ? $from_package->splitdir( $fspec_dirs ) : ();

           This error is troublesome since the test passed on my system using
           Active Perl under Microsoft NT. It should never have passed.  This
           error is in a core method, fspec2fspec, that changes file specifi-
           cations from one operating system to another operating system.
           This method has been in service unchanged for some time.

       Test-TestUtil-0.03
           Correct failure from Josts Smokehouse" <Jost.Krieger+smoke-
           back@ruhr-uni-bochum.de> test run

           PERL_DL_NONLAZY=1 /usr/local/perl/bin/perl "-MExtUtils::Com-
           mand::MM" "-e" "test_harness(0, 'blib/lib', 'blib/arch')"
           t/Test/TestUtil/TestUtil.t t/Test/TestUtil/TestUtil....# Test 18
           got: '$VAR1 = ''; ' (t/Test/TestUtil/TestUtil.t at line 540 fail
           #17) #    Expected: '$VAR1 = '\\=head1 Title Page

           The pm2datah method is not returning any data for Test 18. This
           will also cause the test of pm2data, test 19 to fail.  The pm2datah
           is searching for the string "\n__DATA__\n".

           The "\n" character on Perl is a logical end of line character
           sequence.  The "\n" end of line is different on Mr. Smokehouse's
           Unix operating system than on my Windows NT operating system.  The
           test file was created under MSWin32 and uses a MSWin32 "\n".  Under
           UNIX, pm2datah method will look for the Unix "\n" and there will
           not be any.

           Changed "\n__DATA__\n" to /[\012\015]__DATA__/.

           During the clean-up for CPAN, broke the format_hash_table method
           for tables in hash of hash format.  Fixed the break, added test 29
           to the t/Test/TestUtil/TestUtil.t test script for this feature, and
           added a discusssion of this feature in POD discription for for-
           mat_hash_table

       Test-TestUtil-0.04
           item our old friend visits again - DOS and UNIX text file incompat-
           ibility

           This impacts other modules. We have to examine all modules for this
           portability defect and correct any found defects.

           Correct failure from Josts Smokehouse" <Jost.Krieger+smoke-
           back@ruhr-uni-bochum.de> and Kingpin <mthurn@carbon> test runs.

           On Mr. Smokehouse's run email the got: VAR1 clearly showed extra
           white space line that is not present in the expected: VAR1.  In Mr.
           Kingpin's run the got: VAR1 and expected: VAR1 look visually the
           same.  However, the Unix found a difference(s) and failed the test.

           For Mr. Smokehouse's run:

           PERL_DL_NONLAZY=1 /usr/local/bin/perl "-MExtUtils::Command::MM"
           "-e" "test_harness(0, 'blib/lib', 'blib/arch')" t/Test/TestU-
           til/TestUtil.t t/Test/TestUtil/TestUtil....NOK 18# Test 18 got:
           '$VAR1 = '\\=head1 Title Page

            Software Version Description

            for

            Docs::Site_SVD::File_SmartNL - translates any combination of CR and NL to the site \nl

            Revision: D

           [snip]

           (t/Test/TestUtil/TestUtil.t at line 565 fail #17) #    Expected:
           '$VAR1 = '\\=head1 Title Page

            Software Version Description

            for

            Docs::Site_SVD::File_SmartNL - translates any combination of CR and NL to the site \nl

           What we have before, was a totally "failure to communicate." aka
           Cool Hand Luke.  VAR1 was empty. Now VAR1 has something. It is not
           completely dead.  One probable cause is the Unix operating system
           must be producing two Unix \012 new lines for a Microsoft single
           newline \015\012.  Without being able to examine the test with a
           debugger, the only way to verify this is to provide the fix and see
           if the problem goes away when this great group of testers try for
           the fourth time.

           Revised fin method to take a handle, change pm2datah method handle,
           $fh, to binary by adding a binmode $fh statement, and pass the
           actual thru the fin method for test 18.

           Use fin($fh) to read in the data for pm2data, test 19 Unit Under
           Test (UUT), instead of using the raw file handle.

           The fin method takes any \015\012 combination and changes it into
           the logical Perl new line, "\n", for the current operating system.

       File-FileUtil-0.01
           *   At 02:44 AM 6/14/2003 +0200, Max Maischein wrote: A second
               thing that I would like you to reconsider is the naming of
               "Test::TestUtil" respectively "Test::Tech" - neither of those
               is descriptive of what the routines actually do or what the
               module implements. I would recommend renaming them to something
               closer to your other modules, maybe "Test::SVDMaker::Util" and
               "Test::SVDMaker::Tech", as some routines do not seem to be spe-
               cific to the Test::-suite but rather general (format_array_ta-
               ble). Some parts (the "scrub" routines) might even better live
               in another module namespace, "Test::Util::ScrubData" or some-
               thing like that.

               Broke away all the file related methods from Test::TestUtil and
               created this module File::FileUtil so the module name is more
               descriptive of the methods within the module.

           *   Broke the smart nl code out of the fin method and made it is
               own separate method, smart_nl method.

               At 02:44 AM 6/14/2003 +0200, Max Maischein wrote: Perl, as Perl
               already does smart newline handling, (even though with the
               advent of 5.8 even Unix-people have to learn the word "binmode"
               now :-))

               The only place where I see Perl does smart newline handling is
               the crlf IO displine introduce in Perl 5.6.  The File::FileUtil
               has a use 5.001 so that 5.6 Perl built-ins cannot be used.
               Added comment to smart_nl that for users with 5.6 Perl that it
               may be better to use the built-in crlf IO discipline.

           *   For the load_package method that uses a eval "require $package"
               to load the package, the $@ does not capture all the warnings
               and error messages, at least not with ActiveState Perl.  Added
               code the captures also the warnings, by temporaily reassigning
               $SIG(__WARN__), and added these to the $@ error messages.

           *   Added two new tests to verify the NOGO paths for the for the
               load_package method.  One tests for load module failure looking
               for all the possilbe information on why the module did not
               load. The other verifies that the vocabulary is present after
               the loading the module.  This information is very helpful when
               you must remote debug a load failure from CPAN testing whose is
               running on a different platform.

       File:-FileUtil-0.02
           Added the method hex_dump.

       File-FileUtil-0.03
           test_lib2inc
               Returns to parent directory of the first t directory going up
               from the test script instead of the t directory.

           find_t_roots
               Added the function find_t_roots that returns the parent direc-
               tory of all the directories in @INC

       File-SmartNL-0.01
           Removed the methods for addressing the different CR LF combinations
           for NL between operating systems
            from the "File::FileUtil" module to their own module
           "File::SmartNL" module.  The module name is now much more descrip-
           tive of the routines in the module.

       File-SmartNL-0.02
           Removed the dump_hex method. This was a quite diagnostic.  If need
           to permanently dump_hex, use the "Data::HexDump" or the "Data::Hex-
           dumper" module.

       File-SmartNL-0.03
           Change the test so that test support program modules resides in
           distribution directory tlib directory instead of the lib directory.
           Because they are no longer in the lib directory, test support files
           will not be installed as a pre-condition for the test of this mod-
           ule.  The test of this module will precede immediately.  The test
           support files in the tlib directory will vanish after the install-
           tion.

       File-SmartNL-0.04
           The lastest build of Test::STDmaker expects the test library in the
           same directory as the test script.  Coordiated with the lastest
           Test::STDmaker by moving the test library from tlib to t/File, the
           same directory as the test script and deleting the test library
           File::TestPath program module.

           Added better option support by using the "Data::Startup" program
           module.

           Added a subroutine interface.

       File-SmartNL-0.05
           Better test for a file handle. Do not close a file handle.

           Changed "$options-"warn>, function, to "$options-"{warn}>, a value.

       3.4 Adaptation data.

       This installation requires that the installation site has the Perl pro-
       gramming language installed.  There are no other additional require-
       ments or tailoring needed of configurations files, adaptation data or
       other software needed for this installation particular to any installa-
       tion site.

       3.5 Related documents.

       There are no related documents needed for the installation and test of
       this release.

       3.6 Installation instructions.

       Instructions for installation, installation tests and installation sup-
       port are as follows:

       Installation Instructions.
           To installed the release file, use the CPAN module pr PPM module in
           the Perl release or the INSTALL.PL script at the following web
           site:

            http://packages.SoftwareDiamonds.com

           Follow the instructions for the the chosen installation software.

           If all else fails, the file may be manually installed.  Enter one
           of the following repositories in a web browser:

             http://www.softwarediamonds/packages/
             http://www.perl.com/CPAN/authors/id/S/SO/SOFTDIA/

           Right click on 'File-SmartNL-0.05.tar.gz' and download to a tempo-
           rary installation directory.  Enter the following where $make is
           'nmake' for microsoft windows; otherwise 'make'.

            gunzip File-SmartNL-0.05.tar.gz
            tar -xf File-SmartNL-0.05.tar
            perl Makefile.PL
            $make test
            $make install

           On Microsoft operating system, nmake, tar, and gunzip must be in
           the exeuction path. If tar and gunzip are not install, download and
           install unxutils from

            http://packages.softwarediamonds.com

       Prerequistes.
            None.

       Security, privacy, or safety precautions.
           None.

       Installation Tests.
           Most Perl installation software will run the following test
           script(s) as part of the installation:

            t/File/SmartNL.t

       Installation support.
           If there are installation problems or questions with the installa-
           tion contact

            603 882-0846 E<lt>support@SoftwareDiamonds.comE<gt>

       3.7 Possible problems and known errors

       There is still much work needed to ensure the quality of this module as
       follows:

       o   State the functional requirements for each method including not
           only the GO paths but also what to expect for the NOGO paths

       o   All the tests are GO path tests. Should add NOGO tests.

       o   Add the requirements addressed as # R: comment to the tests


4.0 NOTES

       The following are useful acronyms:

       .d  extension for a Perl demo script file

       .pm extension for a Perl Library Module

       .t  extension for a Perl test script file

       POD Plain Old Documentation


2.0 SEE ALSO

       File::SmartNL
       Docs::US_DOD::SVD

perl v5.8.8                       2004-05-13   Docs::Site_SVD::File_SmartNL(3)

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