X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2Flook.pl;h=ccc9b6162ae0f8885f316b854f48c2fdc4c3bd54;hb=6d5637c3050c14fb5c11ec5a05db33dce9e4a7a8;hp=4c14e64727a520fc100d38db0490293fe61f3541;hpb=fe14fcc35f78a371a174a1d14256c2f35ae4262b;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/lib/look.pl b/lib/look.pl
index 4c14e64..ccc9b61 100644
--- a/lib/look.pl
+++ b/lib/look.pl
@@ -1,5 +1,11 @@
 ;# Usage: &look(*FILEHANDLE,$key,$dict,$fold)
-
+#
+# This library is no longer being maintained, and is included for backward
+# compatibility with Perl 4 programs which may require it.
+#
+# In particular, this should not be used as an example of modern Perl
+# programming techniques.
+#
 ;# Sets file position in FILEHANDLE to be first line greater than or equal
 ;# (stringwise) to $key.  Pass flags for dictionary order and case folding.
 
@@ -10,7 +16,7 @@ sub look {
        $blksize,$blocks) = stat(FH);
     $blksize = 8192 unless $blksize;
     $key =~ s/[^\w\s]//g if $dict;
-    $key =~ y/A-Z/a-z/ if $fold;
+    $key = lc $key if $fold;
     $max = int($size / $blksize);
     while ($max - $min > 1) {
 	$mid = int(($max + $min) / 2);
@@ -19,7 +25,7 @@ sub look {
 	$_ = <FH>;
 	chop;
 	s/[^\w\s]//g if $dict;
-	y/A-Z/a-z/ if $fold;
+	$_ = lc $_ if $fold;
 	if ($_ lt $key) {
 	    $min = $mid;
 	}
@@ -33,7 +39,7 @@ sub look {
     while (<FH>) {
 	chop;
 	s/[^\w\s]//g if $dict;
-	y/A-Z/a-z/ if $fold;
+	$_ = lc $_ if $fold;
 	last if $_ ge $key;
 	$min = tell(FH);
     }