docs: Which API calls were first supported in which upstream versions.

[libguestfs.git] / generator / generator_api_versions.ml

diff --git a/generator/generator_api_versions.ml b/generator/generator_api_versions.ml
new file mode 100644 (file)
index 0000000..5f9d96f
--- /dev/null
+++ b/generator/generator_api_versions.ml
@@ -0,0 +1,44 @@
+(* libguestfs
+ * Copyright (C) 2010 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ *)
+
+(* Please read generator/README first. *)
+
+open Generator_utils
+
+let hash = Hashtbl.create 13
+
+let load_api_versions filename =
+  let chan = open_in filename in
+  let rec loop lineno =
+    let line = input_line chan in
+    let sym, ver =
+      match string_split " " line with
+      | [ sym; ver ] -> sym, ver
+      | _ ->
+          failwithf "%s: %d: invalid input in API versions file"
+            filename lineno in
+    Hashtbl.replace hash sym ver;
+    loop (lineno+1)
+  in
+  (try loop 1 with End_of_file -> ());
+  close_in chan
+
+let lookup_api_version sym =
+  try Hashtbl.find hash sym
+  with Not_found ->
+    failwithf "API symbol \"%s\" not found in API versions file" sym