Remove copyright headers from individual scripts

[dbsrgits/SQL-Translator.git] / lib / SQL / Translator / Utils.pm

diff --git a/lib/SQL/Translator/Utils.pm b/lib/SQL/Translator/Utils.pm
index cd0be09..090b2e7 100644 (file)
--- a/lib/SQL/Translator/Utils.pm
+++ b/lib/SQL/Translator/Utils.pm
@@ -1,36 +1,18 @@
 package SQL::Translator::Utils;
 
-# ----------------------------------------------------------------------
-# Copyright (C) 2002-2009 SQLFairy Authors
-#
-# 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; version 2.
-#
-# 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., 59 Temple Place, Suite 330, Boston, MA
-# 02111-1307  USA
-# -------------------------------------------------------------------
-
 use strict;
 use base qw(Exporter);
 use vars qw($VERSION $DEFAULT_COMMENT @EXPORT_OK);
 use Digest::SHA1 qw( sha1_hex );
 use Exporter;
-use Readonly;
 
 $VERSION = '1.59';
 $DEFAULT_COMMENT = '-- ';
 @EXPORT_OK = qw(
-    debug normalize_name header_comment parse_list_arg truncate_id_uniquely $DEFAULT_COMMENT parse_mysql_version
+    debug normalize_name header_comment parse_list_arg truncate_id_uniquely
+    $DEFAULT_COMMENT parse_mysql_version parse_dbms_version
 );
-Readonly my $COLLISION_TAG_LENGTH => 8;
+use constant COLLISION_TAG_LENGTH => 8;
 
 # ----------------------------------------------------------------------
 # debug(@msg)
@@ -158,12 +140,12 @@ sub truncate_id_uniquely {
       unless defined $desired_name && length $desired_name > $max_symbol_length;
 
     my $truncated_name = substr $desired_name, 0,
-      $max_symbol_length - $COLLISION_TAG_LENGTH - 1;
+      $max_symbol_length - COLLISION_TAG_LENGTH - 1;
 
     # Hex isn't the most space-efficient, but it skirts around allowed
     # charset issues
     my $digest = sha1_hex($desired_name);
-    my $collision_tag = substr $digest, 0, $COLLISION_TAG_LENGTH;
+    my $collision_tag = substr $digest, 0, COLLISION_TAG_LENGTH;
 
     return $truncated_name
          . '_'
@@ -218,6 +200,46 @@ sub parse_mysql_version {
     }
 }
 
+#---------------------------------------------------------------------
+# parse_dbms_version ( $version_string, $target )
+#
+# Attempts to parse either a native or perl-style version string into
+# a version number format as specified by $target, which can be either
+# 'perl' for a perl-style version number, or 'native' for an X.X.X
+# style version number.
+#---------------------------------------------------------------------
+sub parse_dbms_version {
+    my ($v, $target) = @_;
+
+    return undef unless $v;
+
+    my @vers;
+
+    # X.Y.Z style 
+    if ( $v =~ / ^ (\d+) \. (\d{1,3}) (?: \. (\d{1,3}) )? $ /x ) {
+        push @vers, $1, $2, $3;
+    }
+
+    # XX.YYYZZZ (perl) style or simply X 
+    elsif ( $v =~ / ^ (\d+) (?: \. (\d{3}) (\d{3}) )? $ /x ) {
+        push @vers, $1, $2, $3;
+    }
+    else {
+        #how do I croak sanely here?
+        die "Unparseable database server version '$v'";
+    }
+
+    if ($target eq 'perl') {
+        return sprintf ('%d.%03d%03d', map { $_ || 0 } (@vers) );
+    }
+    elsif ($target eq 'native') {
+        return join '.' => grep defined, @vers;
+    }
+    else {
+        #how do I croak sanely here?
+        die "Unknown version target '$target'";
+    }
+}
 
 1;