unikernel/duniverse/angstrom/unix/angstrom_unix.ml

@@ -0,0 +1,52 @@
+(*----------------------------------------------------------------------------
+    Copyright (c) 2016 Inhabited Type LLC.
+
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    1. Redistributions of source code must retain the above copyright
+       notice, this list of conditions and the following disclaimer.
+
+    2. Redistributions in binary form must reproduce the above copyright
+       notice, this list of conditions and the following disclaimer in the
+       documentation and/or other materials provided with the distribution.
+
+    3. Neither the name of the author nor the names of his contributors
+       may be used to endorse or promote products derived from this software
+       without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS ``AS IS'' AND ANY EXPRESS
+    OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+    DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE FOR
+    ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+    STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+    ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+    POSSIBILITY OF SUCH DAMAGE.
+  ----------------------------------------------------------------------------*)
+
+open Angstrom.Buffered
+
+let parse ?(buf_size=0x1000) p in_chan =
+  let bytes = Bytes.create buf_size in
+  let rec loop = function
+    | Partial k ->
+      begin match input in_chan bytes 0 buf_size with
+      | 0 -> loop (k `Eof)
+      | n -> loop (k (`String (Bytes.(unsafe_to_string (sub bytes 0 n)))))
+      end
+    | state -> state
+  in
+  let state = loop (parse p) in
+  match state_to_unconsumed state with
+  | None    -> assert false
+  | Some us -> us, state_to_result state
+
+let parse_many ?buf_size p k in_chan =
+  parse ?buf_size Angstrom.(skip_many (p <* commit >>| k)) in_chan