1 files changed, 110 insertions, 0 deletions
diff --git a/contrib/libio/filedoalloc.c b/contrib/libio/filedoalloc.c
new file mode 100644
index 0000000..5c62280
--- /dev/null
+++ b/contrib/libio/filedoalloc.c
@@ -0,0 +1,110 @@
+/* Copyright (C) 1993, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU IO Library.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   This library is distributed in the hope that it will be useful, but
+   WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this library; see the file COPYING.  If not, write to
+   the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
+   MA 02111-1307, USA.
+
+   As a special exception, if you link this library with files
+   compiled with a GNU compiler to produce an executable, this does
+   not cause the resulting executable to be covered by the GNU General
+   Public License.  This exception does not however invalidate any
+   other reasons why the executable file might be covered by the GNU
+   General Public License.  */
+
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * 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.
+ */
+
+/* Modified for GNU iostream by Per Bothner 1991, 1992. */
+
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
+#include "libioP.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#ifdef __STDC__
+#include <stdlib.h>
+#include <unistd.h>
+#endif
+
+#ifdef _LIBC
+# undef isatty
+# define isatty(Fd) __isatty (Fd)
+#endif
+
+/*
+ * Allocate a file buffer, or switch to unbuffered I/O.
+ * Per the ANSI C standard, ALL tty devices default to line buffered.
+ *
+ * As a side effect, we set __SOPT or __SNPT (en/dis-able fseek
+ * optimisation) right after the _fstat() that finds the buffer size.
+ */
+
+int
+_IO_file_doallocate (fp)
+     _IO_FILE *fp;
+{
+  _IO_size_t size;
+  int couldbetty;
+  char *p;
+  struct stat st;
+
+#if !defined(_LIBC) && !defined(__linux__)
+  /* If _IO_cleanup_registration_needed is non-zero, we should call the
+     function it points to.  This is to make sure _IO_cleanup gets called
+     on exit.  We call it from _IO_file_doallocate, since that is likely
+     to get called by any program that does buffered I/O. */
+  if (_IO_cleanup_registration_needed)
+    (*_IO_cleanup_registration_needed) ();
+#endif
+
+  if (fp->_fileno < 0 || _IO_SYSSTAT (fp, &st) < 0)
+    {
+      couldbetty = 0;
+      size = _IO_BUFSIZ;
+#if 0
+      /* do not try to optimise fseek() */
+      fp->_flags |= __SNPT;
+#endif
+    }
+  else
+    {
+      couldbetty = S_ISCHR (st.st_mode);
+#if _IO_HAVE_ST_BLKSIZE
+      size = st.st_blksize <= 0 ? _IO_BUFSIZ : st.st_blksize;
+#else
+      size = _IO_BUFSIZ;
+#endif
+    }
+  ALLOC_BUF (p, size, EOF);
+  _IO_setb (fp, p, p + size, 1);
+  if (couldbetty && isatty (fp->_fileno))
+    fp->_flags |= _IO_LINE_BUF;
+  return 1;
+}