1 files changed, 61 insertions, 0 deletions
diff --git a/newlib/libc/sys/mmixware/lseek.c b/newlib/libc/sys/mmixware/lseek.c
new file mode 100644
index 000000000..9405dd2a4
--- /dev/null
+++ b/newlib/libc/sys/mmixware/lseek.c
@@ -0,0 +1,61 @@
+/* lseek for MMIXware.
+
+   Copyright (C) 2001 Hans-Peter Nilsson.
+
+   Permission to use, copy, modify, and distribute this software is freely
+   granted, provided that this notice is preserved with no changes.
+   THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+   IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+   WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+   PURPOSE.  */
+
+#include <_ansi.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/unistd.h>
+#include "sys/syscall.h"
+#include <errno.h>
+
+off_t
+_lseek (int file,
+      off_t ptr,
+      int dir)
+{
+  off_t simoff = dir == SEEK_END ? -(ptr + 1) : ptr;
+  long ret;
+
+  if ((unsigned int) file >= 32 || _MMIX_allocated_filehandle[file] == 0)
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  if (dir == SEEK_CUR)
+    {
+      long curpos = TRAP2f (SYS_Ftell, file, 0);
+
+      if (curpos == -1)
+      {
+        errno = EIO;
+        return -1;
+      }
+
+      ptr += (off_t) curpos;
+    }
+
+  ret = TRAP2f (SYS_Fseek, file, simoff);
+  if (ret == -1)
+    {
+      return -1;
+      errno = EIO;
+    }
+
+  ret = TRAP2f (SYS_Ftell, file, 0);
+  if (ret == -1)
+    {
+      errno = EIO;
+      return -1;
+    }
+
+  return ret;
+}