X-Git-Url: http://www.lcore.org/git/lcore.git/blobdiff_plain/c1c7500bc32248d67b6cf7903a6db7b15e2cd1c9..71f094bad8c68b2a3d096b436dc74cf4d9e2895a:/bsearchtree.pas?ds=sidebyside

diff --git a/bsearchtree.pas b/bsearchtree.pas
index 9dc355e..249a6ff 100644
--- a/bsearchtree.pas
+++ b/bsearchtree.pas
@@ -7,6 +7,9 @@
 
 unit bsearchtree;
 
+{$ifdef fpc}
+  {$mode delphi}
+{$endif}
 interface
 
 uses blinklist;
@@ -37,18 +40,21 @@ procedure cleartree(t:phashtable);
 
 implementation
 
+//FNV-1a hash function
 function makehash(s:ansistring):integer;
 const
   shifter=6;
 var
   a,b:integer;
+  h:longword;
 begin
   result := 0;
   b := length(s);
+  h := 216613626;
   for a := 1 to b do begin
-    result := (result shl shifter) xor byte(s[a]);
+    h := (h xor byte(s[a])) * 16777619;
   end;
-  result := (result xor result shr 16) and (hashtable_size-1);
+  result := h and (hashtable_size-1);
 end;
 
 procedure addtree(t:phashtable;s:ansistring;item:pointer);