unikernel/duniverse/ocaml-cstruct/lib/cstruct_stubs.c

@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2012 Anil Madhavapeddy <anil@recoil.org>
+ * Copyright (c) 2012 Pierre Chambart
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <string.h>
+#include <stdint.h>
+
+#include <caml/mlvalues.h>
+#include <caml/memory.h>
+#include <caml/alloc.h>
+#include <caml/bigarray.h>
+
+#ifndef Bytes_val
+#define Bytes_val String_val
+#endif
+
+CAMLprim value
+caml_blit_bigstring_to_string(value val_buf1, value val_ofs1, value val_buf2, value val_ofs2, value val_len)
+{
+  memcpy(Bytes_val(val_buf2) + Long_val(val_ofs2),
+         (char*)Caml_ba_data_val(val_buf1) + Long_val(val_ofs1),
+         Long_val(val_len));
+  return Val_unit;
+}
+
+CAMLprim value
+caml_blit_string_to_bigstring(value val_buf1, value val_ofs1, value val_buf2, value val_ofs2, value val_len)
+{
+  memcpy((char*)Caml_ba_data_val(val_buf2) + Long_val(val_ofs2),
+         String_val(val_buf1) + Long_val(val_ofs1),
+         Long_val(val_len));
+  return Val_unit;
+}
+
+CAMLprim value
+caml_blit_bigstring_to_bigstring(value val_buf1, value val_ofs1, value val_buf2, value val_ofs2, value val_len)
+{
+  memmove((char*)Caml_ba_data_val(val_buf2) + Long_val(val_ofs2),
+         (char*)Caml_ba_data_val(val_buf1) + Long_val(val_ofs1),
+         Long_val(val_len));
+  return Val_unit;
+}
+
+CAMLprim value
+caml_compare_bigstring(value val_buf1, value val_ofs1, value val_buf2, value val_ofs2, value val_len)
+{
+  int res = memcmp((char*)Caml_ba_data_val(val_buf1) + Long_val(val_ofs1),
+                   (char*)Caml_ba_data_val(val_buf2) + Long_val(val_ofs2),
+                   Long_val(val_len));
+  return Val_int(res);
+}
+
+CAMLprim value
+caml_fill_bigstring(value val_buf, value val_ofs, value val_len, value val_byte)
+{
+  memset((char*)Caml_ba_data_val(val_buf) + Long_val(val_ofs),
+         Int_val(val_byte),
+         Long_val(val_len));
+  return Val_unit;
+}
+
+CAMLprim value
+caml_check_alignment_bigstring(value val_buf, value val_ofs, value val_alignment)
+{
+  uint64_t address = (uint64_t) ((char *)Caml_ba_data_val(val_buf) + Long_val(val_ofs));
+  uintnat alignment = Unsigned_long_val(val_alignment);
+  return Val_bool(address % alignment == 0);
+}