Implementation du type file_descr par le type HANDLE de Win32. Court-circuite la libc de MSVC.

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@1700 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02

1 files changed, 39 insertions, 0 deletions

diff --git a/otherlibs/win32unix/lseek.c b/otherlibs/win32unix/lseek.c
new file mode 100644
index 000000000..befd87ab2
--- /dev/null
+++ b/otherlibs/win32unix/lseek.c
@@ -0,0 +1,39 @@
+/***********************************************************************/
+/*                                                                     */
+/*                           Objective Caml                            */
+/*                                                                     */
+/*            Xavier Leroy, projet Cristal, INRIA Rocquencourt         */
+/*                                                                     */
+/*  Copyright 1996 Institut National de Recherche en Informatique et   */
+/*  Automatique.  Distributed only by permission.                      */
+/*                                                                     */
+/***********************************************************************/
+
+/* $Id$ */
+
+#include <mlvalues.h>
+#include "unixsupport.h"
+
+#ifdef HAS_UNISTD
+#include <unistd.h>
+#else
+#define SEEK_SET 0
+#define SEEK_CUR 1
+#define SEEK_END 2
+#endif
+
+static int seek_command_table[] = {
+  FILE_BEGIN, FILE_CURRENT, FILE_END
+};
+
+value unix_lseek(value fd, value ofs, value cmd)   /* ML */
+{
+  long ret;
+  ret = SetFilePointer(Handle_val(fd), Long_val(ofs), NULL,
+                       seek_command_table[Int_val(cmd)]);
+  if (ret == -1) {
+    _dosmaperr(GetLastError());
+    uerror("lseek", Nothing);
+  }
+  return Val_long(ret);
+}