From 8be9b48be685645e2f5b977de10492108581352c Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Mon, 12 Nov 2001 21:04:41 +0000
Subject: 2001-11-12  Hans-Peter Nilsson  <hp@bitrange.com>

        * libc/include/machine/ieeefp.h: Add support for mmix target.
        * libc/include/machine/setjmp.h: Ditto.
        * configure.host: Ditto.
        * libc/sys/mmixware/Makefile.am, libc/sys/mmixware/_exit.c,
        libc/sys/mmixware/access.c, libc/sys/mmixware/aclocal.m4,
        libc/sys/mmixware/chmod.c, libc/sys/mmixware/chown.c,
        libc/sys/mmixware/close.c, libc/sys/mmixware/configure.in,
        libc/sys/mmixware/creat.c, libc/sys/mmixware/crt0.c,
        libc/sys/mmixware/execv.c, libc/sys/mmixware/execve.c,
        libc/sys/mmixware/fork.c, libc/sys/mmixware/fstat.c,
        libc/sys/mmixware/getpid.c, libc/sys/mmixware/gettime.c,
        libc/sys/mmixware/isatty.c, libc/sys/mmixware/kill.c,
        libc/sys/mmixware/lseek.c, libc/sys/mmixware/open.c,
        libc/sys/mmixware/pipe.c, libc/sys/mmixware/read.c,
        libc/sys/mmixware/sbrk.c, libc/sys/mmixware/setjmp.S,
        libc/sys/mmixware/stat.c, libc/sys/mmixware/sys/syscall.h,
        libc/sys/mmixware/time.c, libc/sys/mmixware/times.c,
        libc/sys/mmixware/unlink.c, libc/sys/mmixware/utime.c,
        libc/sys/mmixware/wait.c, libc/sys/mmixware/write.c: New files.
        * libc/sys/mmixware/configure, libc/sys/mmixware/Makefile.in,
        libc/sys/mmixware/aclocal.m4: Generate.
---
 newlib/libc/sys/mmixware/open.c | 106 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 newlib/libc/sys/mmixware/open.c

(limited to 'newlib/libc/sys/mmixware/open.c')

diff --git a/newlib/libc/sys/mmixware/open.c b/newlib/libc/sys/mmixware/open.c
new file mode 100644
index 000000000..ec0d222d5
--- /dev/null
+++ b/newlib/libc/sys/mmixware/open.c
@@ -0,0 +1,106 @@
+/* open 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 <fcntl.h>
+#include <_ansi.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include "sys/syscall.h"
+#include <errno.h>
+
+/* Let's keep the filehandle array here, since this is a primary
+   initializer of it.  */
+unsigned char _MMIX_allocated_filehandle[32] =
+ {
+   1,
+   1,
+   1,
+   0, 0, 0, 0, 0,
+   0, 0, 0, 0, 0, 0, 0, 0,
+   0, 0, 0, 0, 0, 0, 0, 0,
+   0, 0, 0, 0, 0, 0, 0, 0
+ };
+
+int
+_open (const char *path,
+       int flags, ...)
+{
+  long fileno;
+  unsigned char mode;
+  long fffile = 0;
+  long ret;
+
+  for (fileno = 0;
+       fileno < (sizeof (_MMIX_allocated_filehandle) /
+          sizeof (_MMIX_allocated_filehandle[0]));
+       fileno++)
+    if (_MMIX_allocated_filehandle[fileno] == 0)
+      break;
+
+  if (fileno == (sizeof (_MMIX_allocated_filehandle) /
+               sizeof (_MMIX_allocated_filehandle[0])))
+    {
+      errno = EMFILE;
+      return -1;
+    }
+
+  /* We map this to a fopen call.  The flags parameter is stymied because
+     we don't support more other than these flags.  */
+  if (flags & ~(O_RDONLY | O_WRONLY | O_RDWR | O_CREAT | O_APPEND | O_TRUNC))
+    {
+      UNIMPLEMENTED (("path: %s, flags: %d", path, flags));
+      errno = ENOSYS;
+      return -1;
+    }
+
+  if ((flags & O_ACCMODE) == O_RDONLY)
+    mode = BinaryRead;
+  else if ((flags & (O_WRONLY | O_APPEND)) == (O_WRONLY | O_APPEND))
+    {
+      mode = BinaryReadWrite;
+      fffile = 1;
+    }
+  else if ((flags & (O_RDWR | O_APPEND)) == (O_RDWR | O_APPEND))
+    {
+      mode = BinaryReadWrite;
+      fffile = 1;
+    }
+  else if ((flags & (O_WRONLY | O_CREAT)) == (O_WRONLY | O_CREAT)
+         || (flags & (O_WRONLY | O_TRUNC)) == (O_WRONLY | O_TRUNC))
+    mode = BinaryWrite;
+  else if ((flags & (O_RDWR | O_CREAT)) == (O_RDWR | O_CREAT))
+    mode = BinaryReadWrite;
+  else if (flags & O_RDWR)
+    mode = BinaryReadWrite;
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+
+  ret = TRAP3f (SYS_Fopen, fileno, path, mode);
+  if (ret < 0)
+    {
+      /* It's totally unknown what the error was.  We'll just take our
+       chances and assume ENOENT.  */
+      errno = ENOENT;
+      return -1;
+    }
+
+  _MMIX_allocated_filehandle[fileno] = 1;
+
+  if (fffile)
+    {
+      TRAP2f (SYS_Fseek, fileno, -1);
+    }
+
+  return fileno;
+}
-- 
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