Merge branch 'master' of /home/john/Development/pspp-bare

[pspp-builds.git] / perl-module / lib / PSPP.pm

diff --git a/perl-module/lib/PSPP.pm b/perl-module/lib/PSPP.pm
index 201e99c0576014ee58497d2e1dfdacd27cb84ced..a000b0115adbbd60a066787cdb6fec2f7cd19c6a 100644 (file)
--- a/perl-module/lib/PSPP.pm
+++ b/perl-module/lib/PSPP.pm
@@ -87,9 +87,9 @@ sub new
 
 =pod
 
 
 =pod
 

-=head3 get_var
+=head3 get_var ($idx)

 
 

-Returns a variable from a dictionary
+Returns the C<idx>th variable from the dictionary.

 
 =cut
 
 
 =cut
 


@@ -333,8 +333,20 @@ sub set_value_labels
 Sets the missing values for the variable.  
 No more than three missing values may be specified.
 
 Sets the missing values for the variable.  
 No more than three missing values may be specified.
 

-=cut
+=head3 get_name ()
+
+Returns the name of the variable.
+
+=head3 get_label ()
+
+Returns the label of the variable or undef if there is no label.

 
 

+=head3 get_value_labels ()
+
+Returns a reference to a hash containing the value labels for the variable.
+The hash is keyed by data values which correpond to the labels.
+
+=cut

 
 package PSPP::Sysfile;
 
 
 package PSPP::Sysfile;
 


@@ -395,6 +407,12 @@ The system file will be automatically closed when it goes out of scope.
 
 package PSPP::Reader;
 
 
 package PSPP::Reader;
 

+=pod
+
+=head2 PSPP::Reader
+
+=cut
+

 sub open
 {
     my $class = shift;
 sub open
 {
     my $class = shift;


@@ -409,6 +427,17 @@ sub open
     return $self;
 }
 
     return $self;
 }
 

+=pod
+
+=head3 open ($filename)
+
+Opens a system file for reading.
+
+Open is used to read data from an existing system file. 
+It creates and returns a PSPP::Reader object which can be used to read 
+data and dictionary information from <C>filename.
+
+=cut

 
 sub get_dict
 {
 
 sub get_dict
 {


@@ -421,7 +450,42 @@ sub get_dict
     return $dict;
 }
 
     return $dict;
 }
 

+=pod
+
+=head3 get_dict ()
+
+Returns the dictionary associated with the reader.
+
+=head3 get_next_case ()
+
+Retrieves the next case from the reader.
+This method returns an array of scalars, each of which are the values of 
+the data in the system file.
+The first call to <C>get_next_case after <C>open has been called retrieves
+the first case in the system file.  Each subsequent call retrieves the next
+case.  If there are no more cases to be read, the function returns undef.
+
+If the case contains system missing values, these values are set to the 
+empty string.

 
 

+=head2 Miscellaneous subroutines
+
+The following subroutines provide (hopefully) useful information about the 
+values retrieved from a reader.
+
+=head3 PSPP::format_value ($value, $variable)
+
+Returns a scalar containing a string representing C<value> formatted accoring 
+to the print format of C<variable>.
+In the most common ussage,  C<value> should be a value of C<variable>.
+
+
+=head3 PSPP::value_is_missing ($value, $variable)
+
+Returns non-zero if C<value> is either system missing, or if it matches the 
+user missing criteria for C<variable>.
+
+=cut

 
 1;
 __END__
 
 1;
 __END__


@@ -433,21 +497,19 @@ John Darrington, E<lt>john@darrington.wattle.id.auE<gt>
 
 =head1 COPYRIGHT AND LICENSE
 
 
 =head1 COPYRIGHT AND LICENSE
 

-Copyright (C) 2007 by Free Software Foundation
+Copyright (C) 2007, 2008 by Free Software Foundation

 
 

-   This program is free software; you can redistribute it and/or
-   modify it under the terms of the GNU General Public License as
-   published by the Free Software Foundation; either version 2 of the
-   License, or (at your option) any later version.
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.

 
 

-   This program is distributed in the hope that it will be useful, but
-   WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   General Public License for more details.
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.

 
 

-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA.
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.

 
 =cut
 
 =cut