Revert my previous changes (rev 1722 reverted back to rev 1721)

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

diff --git a/lib/SQL/Translator/Utils.pm b/lib/SQL/Translator/Utils.pm
index f3603f3..3d5e572 100644 (file)
--- a/lib/SQL/Translator/Utils.pm
+++ b/lib/SQL/Translator/Utils.pm
@@ -21,16 +21,16 @@ package SQL::Translator::Utils;
 use strict;
 use base qw(Exporter);
 use vars qw($VERSION $DEFAULT_COMMENT @EXPORT_OK);
-
 use Digest::SHA1 qw( sha1_hex );
-
 use Exporter;
 
-$VERSION = '1.99';
+$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
 );
+use constant COLLISION_TAG_LENGTH => 8;
 
 # ----------------------------------------------------------------------
 # debug(@msg)
@@ -151,18 +151,19 @@ sub parse_list_arg {
 # truncated name, giving a high probability that the symbol will be
 # unique.
 # ----------------------------------------------------------------------
-my $COLLISION_TAG_LENGTH = 8;
 sub truncate_id_uniquely {
     my ( $desired_name, $max_symbol_length ) = @_;
 
-    return $desired_name unless defined $desired_name && length $desired_name > $max_symbol_length;
+    return $desired_name
+      unless defined $desired_name && length $desired_name > $max_symbol_length;
 
-    my $truncated_name = substr $desired_name, 0, $max_symbol_length - $COLLISION_TAG_LENGTH - 1;
+    my $truncated_name = substr $desired_name, 0,
+      $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
          . '_'
@@ -217,6 +218,46 @@ 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;