maxipatch for support of multiple DBs.

[helm.git] / helm / software / components / hmysql / hSqlite3.ml

diff --git a/helm/software/components/hmysql/hSqlite3.ml b/helm/software/components/hmysql/hSqlite3.ml
index 80c939ac8a88f93f393c83cd83e4584a3ebced12..3693e445b84642cba44e78a8c3550639946ddd53 100644 (file)
--- a/helm/software/components/hmysql/hSqlite3.ml
+++ b/helm/software/components/hmysql/hSqlite3.ml
@@ -47,33 +47,46 @@ let prerr_endline s = ()(*HLog.debug s;;*)
 
 let profiler = HExtlib.profile "Sqlite3"
 
-let quick_connect ?host ?(database = "sqlite") ?port ?password ?user () = 
+let quick_connect 
+  is_library
+  ?(host = Helm_registry.get "matita.basedir") 
+  ?(database = "sqlite") ?port ?password ?user () 
+= 
   let username = Helm_registry.get "user.name" in
-  let tmp_db_name =
-    if HExtlib.is_dir "/dev/shm/" && HExtlib.writable_dir "/dev/shm/" then
-      (HLog.debug "using /dev/shm to store the working copy of the db";
-      "/dev/shm/matita.db." ^ username ^ "." ^ string_of_int (Unix.getpid ()))
-    else
-      (HLog.debug "/dev/shm not available";
-      Helm_registry.get "matita.basedir" ^ "/matita.db." ^ username ^ "." ^
-        string_of_int (Unix.getpid ()))
+  let host_mangled = Pcre.replace ~pat:"[/ .]" ~templ:"_" host in
+  let tmp_db_name = 
+    "/dev/shm/matita.db." ^ username ^ "." ^ host_mangled ^ "." ^
+    string_of_int (Unix.getpid ())
   in
-  let db_name = Helm_registry.get "matita.basedir" ^ "/" ^ database ^ ".db" in
-  (* XXX big hack XXX *)
-  let standard_db_name = "/usr/share/matita/metadata.db" in
-  let cp_to_ram_cmd = 
-    if HExtlib.is_regular db_name then
-      "cp " ^ db_name ^ " " ^ tmp_db_name 
+  let db_name = host ^ "/" ^ database in
+  let db_to_open =
+    if HExtlib.is_dir "/dev/shm/" && HExtlib.writable_dir "/dev/shm/" 
+       && (not is_library) 
+    then
+      (let cp_to_ram_cmd = "cp " ^ db_name ^ " " ^ tmp_db_name in
+      ignore (Sys.command cp_to_ram_cmd);
+      let mv_to_disk_cmd _ = 
+        ignore (Sys.command ("mv " ^ tmp_db_name ^ " " ^ db_name)) 
+      in
+      at_exit mv_to_disk_cmd;
+      tmp_db_name)
     else
-      (* we start from the standard library *)
-      "cp " ^ standard_db_name ^ " " ^ tmp_db_name
+      db_name
   in
-  ignore (Sys.command cp_to_ram_cmd);
-  let mv_to_disk_cmd _ = 
-    ignore (Sys.command ("mv " ^ tmp_db_name ^ " " ^ db_name)) 
-  in
-  at_exit mv_to_disk_cmd;
-  Some (Sqlite3.db_open tmp_db_name)
+  let db = Sqlite3.db_open db_to_open in
+  (* attach the REGEX function *)
+  Sqlite3.create_fun2 db "REGEXP"
+      (fun s rex -> 
+         match rex, s with
+         | Sqlite3.Data.TEXT rex, Sqlite3.Data.BLOB s
+         | Sqlite3.Data.TEXT rex, Sqlite3.Data.TEXT s ->
+             let r = Str.regexp rex in
+             if Str.string_match r s 0 then 
+               Sqlite3.Data.INT 1L 
+             else 
+               Sqlite3.Data.INT 0L
+         | _ -> raise (Error "wrong types to 'REGEXP'"));
+  Some db
 ;;
 
 let disconnect db =
@@ -123,7 +136,7 @@ let string_of_rc = function
 
 let pp_rc rc = prerr_endline (string_of_rc rc);;
 
-let exec db s =
+let exec s db =
  prerr_endline s;
   let stored_result = ref [] in
   let store row =
@@ -177,3 +190,5 @@ let errno = function
 ;;
 
 let isMysql = false
+
+let escape_string_for_like = ("ESCAPE \"\\\"" : ('a,'b,'c,'a) format4);;