1 files changed, 49 insertions, 0 deletions
diff --git a/newlib/libc/sys/mmixware/read.c b/newlib/libc/sys/mmixware/read.c
new file mode 100644
index 000000000..b474b807e
--- /dev/null
+++ b/newlib/libc/sys/mmixware/read.c
@@ -0,0 +1,49 @@
+/* read 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/syscall.h"
+#include <errno.h>
+
+int
+_read (int file,
+       char *ptr,
+       size_t len)
+{
+  long ret;
+
+  if ((unsigned int) file >= 32 || _MMIX_allocated_filehandle[file] == 0)
+    {
+      errno = EBADF;
+      return -1;
+    }
+
+  ret = TRAP3f (SYS_Fread, file, ptr, len);
+
+  /* Map the return codes:
+     -1-len: an error.  We return -1.
+     0: success.  We return len.
+     n-len: end-of-file after n chars read.  We return n. */
+  if (ret == 0)
+    return len;
+
+  if (ret == -1 - (long) len)
+    {
+      /* We don't know the nature of the failure, so this is an
+       approximation.  */
+      errno = EIO;
+      return -1;
+    }
+
+  return ret + len;
+}