From a17272283c803e13258e5dc6b19533c672ceee18 Mon Sep 17 00:00:00 2001
From: hattenberger
Date: Wed, 27 Mar 2013 13:17:19 +0000
Subject: some fixes in ivy-ocaml tag 1.2

---
 trunk/ivy.ml | 81 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 trunk/ivy.ml

(limited to 'trunk/ivy.ml')

diff --git a/trunk/ivy.ml b/trunk/ivy.ml
new file mode 100644
index 0000000..f031252
--- /dev/null
+++ b/trunk/ivy.ml
@@ -0,0 +1,81 @@
+(* $Id$ *)
+
+
+type binding
+type client
+type client_event = Connected | Disconnected
+type cb = client -> string array -> unit
+type client_cb = client -> client_event -> unit
+
+external send : string -> unit = "ivy_sendMsg"
+external stop : unit -> unit = "ivy_stop"
+external ext_init : string -> string -> string -> unit = "ivy_init"
+
+
+let gensym = let n = ref 0 in fun p -> incr n; p ^ string_of_int !n
+let cb_register = fun closure ->
+  let s = gensym "callback_" in
+  Callback.register s closure;
+  s
+
+let init = fun name ready ccb ->
+  ext_init name ready (cb_register ccb)
+
+
+external start : string -> unit = "ivy_start"
+external ext_bind : string -> string -> binding = "ivy_bindMsg"
+
+let bind = fun (cb:cb) regexp ->
+  ext_bind (cb_register cb) regexp
+
+external unbind : binding -> unit = "ivy_unbindMsg"
+
+
+external name_of_client : client -> string = "ivy_name_of_client"
+external host_of_client : client -> string = "ivy_host_of_client"
+
+
+
+let marshal_tag = "MARSHAL"
+
+let hexa_char = fun c ->
+  assert(0 <= c && c < 16);
+  if c < 10 then
+    Char.chr (c + Char.code '0')
+  else
+    Char.chr (c + Char.code 'A' - 10)
+
+let hexa_code = fun c ->
+  if '0' <= c && c <= '9' then
+    Char.code c - Char.code '0'
+  else if 'A' <= c && c <= 'F' then
+    Char.code c - Char.code 'A' + 10
+  else failwith (Printf.sprintf "hexa_code: %c" c)
+  
+
+let hexa_of_string = fun s ->
+  let n = String.length s in
+  let h = String.create (n*2) in
+  for i = 0 to n - 1 do
+    let c = Char.code s.[i] in
+    h.[2*i] <- hexa_char (c lsr 4);
+    h.[2*i+1] <- hexa_char (c land 0xf)
+  done;
+  h
+
+let string_of_hexa = fun h ->
+  let n = String.length h / 2 in
+  let s = String.create n in
+  for i = 0 to n - 1 do
+    s.[i] <- Char.chr (hexa_code h.[2*i] lsl 4 + hexa_code h.[2*i+1])
+  done;
+  s
+
+
+let send_data = fun tag value ->
+  let s = hexa_of_string (Marshal.to_string value []) in
+  send (Printf.sprintf "%s %s %s" marshal_tag tag s)
+
+let data_bind = fun cb tag ->
+  let r = Printf.sprintf "%s %s (.*)" marshal_tag tag in
+  bind (fun c a -> cb c (Marshal.from_string (string_of_hexa a.(0)) 0)) r
-- 
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