,

[SXSI/xpathcomp.git] / xPath.ml

diff --git a/xPath.ml b/xPath.ml
index 727c25e..6c88d9a 100644 (file)
--- a/xPath.ml
+++ b/xPath.ml
@@ -190,14 +190,19 @@ module Functions = struct
   type value = [ `NodeSet of Automaton.BST.t 
   | `Int of int | `String of string
   | `Bool of bool | `True | `False ]
+
   type expr = [ value | `Call of (string*(expr list))
-  | `Auto of Automaton.t ]
+  | `Auto of Automaton.t | `Contains of expr list ]
 
 
   let count = function [`NodeSet(s) ] -> `Int(Automaton.BST.cardinal s)
     | _ -> failwith "count"
        
-
+  let contains_old = function [`NodeSet(s) ; `String(str) ] ->
+    `Bool(Automaton.BST.exists (fun tree -> Tree.Binary.contains_old tree str
+                              ) s)
+    | _ -> failwith "contains_old"
+ 
   let equal = function [ `Int i; `Int j ] -> `Bool (i == j)
     |_ -> failwith "equal"
 
@@ -205,17 +210,29 @@ module Functions = struct
 
     ("count",count);
     ("equal",equal);
+    ("contains_old",contains_old);
 ]
 
   let text t = Tree.Binary.string (Tree.Binary.left t)
 
   let rec eval_expr tree (e:expr) : value = match e with 
     | `Call (f,args) -> (List.assoc f globals) (List.map (eval_expr tree) args)
-    | `Auto(a) -> `NodeSet(ignore (Automaton.BottomUp.accept a tree);a.Automaton.result)
+    | `Auto(a) -> `NodeSet(ignore (Automaton.BottomUp.accept a tree);
+                          a.Automaton.result)
+    | `Contains(args) ->
+       begin
+         match args with
+             [ `Auto(a); `String(s) ] ->
+               let docs = Tree.Binary.contains tree s
+               in 
+               let _ = Automaton.BottomUp.accept ~strings:(Some docs) a tree
+               in `NodeSet(a.Automaton.result)         
+           | _ -> failwith "contains invalid"
+       end
     | #value as x  -> x
        
   let truth_value = 
-    function `NodeSet s -> Automaton.BST.is_empty s
+    function `NodeSet s -> not (Automaton.BST.is_empty s)
       |`Bool(b) -> b
       | _ -> failwith "truth_value"
     
@@ -321,6 +338,7 @@ module Compile = struct
              (* q' is not returned and thus not added to the set of final states.
                 It's ok since we should never be in a final state on a node
                 <@> *)
+
        | Attribute,ts -> let q'' = State.mk() in
            (mk_tag_t Left q (TagSet.Xml.attribute) q' ignore)::
              (mk_tag_t Left q' (ts) q'' ignore)::( q==> any @@ (ignore,q))::trs, q''::q'::final,initial
@@ -358,6 +376,7 @@ module Compile = struct
       | Path p -> `Auto(compile p)
       | Int i -> `Int i
       | String s -> `String s
+      | Function ("contains",elist) ->`Contains(List.map compile_expr elist)
       | Function (f,elist) -> `Call(f,List.map compile_expr elist) 
          
   and cup a b = match a,b with