Register custom operations for unsigned integers

Makefile.tests

@@ -582,6 +582,15 @@ tests/test-oo_style/generated_stubs.c: $(BUILDDIR)/test-oo_style-stub-generator.
 tests/test-oo_style/generated_bindings.ml: $(BUILDDIR)/test-oo_style-stub-generator.$(BEST)
 	$< --ml-file $@
 
+test-marshal.dir = tests/test-marshal
+test-marshal.threads = yes
+test-marshal.deps = str bigarray oUnit bytes
+test-marshal.subproject_deps = ctypes ctypes-foreign-base \
+   ctypes-foreign-threaded cstubs tests-common
+test-marshal.link_flags = -L$(BUILDDIR)/clib -ltest_functions
+test-marshal: PROJECT=test-marshal
+test-marshal: $$(BEST_TARGET)
+
 test-type_printing.dir = tests/test-type_printing
 test-type_printing.threads = yes
 test-type_printing.deps = str bigarray oUnit bytes
@@ -1127,6 +1136,7 @@ TESTS += test-passable
 TESTS += test-alignment
 TESTS += test-views-stubs test-views-stub-generator test-views-generated test-views
 TESTS += test-oo_style-stubs test-oo_style-stub-generator test-oo_style-generated test-oo_style
+TESTS += test-marshal
 TESTS += test-type_printing
 TESTS += test-value_printing-stubs test-value_printing-stub-generator test-value_printing-generated test-value_printing
 TESTS += test-complex-stubs test-complex-stub-generator test-complex-generated test-complex

src/ctypes/unsigned.ml

@@ -5,6 +5,9 @@
  * See the file LICENSE for details.
  *)
 
+external init : unit -> unit = "ctypes_unsigned_init"
+let () = init ()
+
 (* Boxed unsigned types *)
 module type Basics = sig
   type t

src/ctypes/unsigned_stubs.c

@@ -213,3 +213,10 @@ value ctypes_int32_of_uint32 (value u) { return caml_copy_int32(Uint_custom_val(
 value ctypes_uintptr_t_size (value _) { return Val_int(sizeof (uintptr_t)); }
 value ctypes_intptr_t_size (value _) { return Val_int(sizeof (intptr_t)); }
 value ctypes_ptrdiff_t_size (value _) { return Val_int(sizeof (ptrdiff_t)); }
+
+value ctypes_unsigned_init(value unit)
+{
+  caml_register_custom_operations(&caml_uint32_ops);
+  caml_register_custom_operations(&caml_uint64_ops);
+  return Val_unit;
+}

tests/test-marshal/test_marshal.ml

@@ -0,0 +1,34 @@
+(*
+ * Copyright (c) 2016 Jeremy Yallop.
+ *
+ * This file is distributed under the terms of the MIT License.
+ * See the file LICENSE for details.
+ *)
+
+open OUnit2
+open Ctypes
+open Unsigned
+
+
+(*
+  Test marshalling and unmarshalling custom integers
+*)
+let test_integer_marshalling _ =
+  let v = (
+    UInt8.zero, UInt16.zero, UInt32.zero, UInt64.zero,
+    UInt8.one, UInt16.one, UInt32.one, UInt64.one,
+    UInt8.of_string "100", UInt16.of_string "1000",
+    UInt32.of_string "10000", UInt64.of_string "100000",
+    UInt8.max_int, UInt16.max_int, UInt32.max_int, UInt64.max_int
+  ) in
+  assert_equal v Marshal.(from_string (to_string v []) 0)
+
+
+let suite = "Marshal tests" >:::
+  ["integer marshalling"
+    >:: test_integer_marshalling;
+  ]
+
+
+let _ =
+  run_test_tt_main suite