Insert libio rewrite and its various changes from devo.

From-SVN: r15129

1 files changed, 40 insertions, 32 deletions

diff --git a/libio/filedoalloc.c b/libio/filedoalloc.c
index f838bb3..f1b781e 100644
--- a/libio/filedoalloc.c
+++ b/libio/filedoalloc.c
@@ -1,26 +1,27 @@
-/* 
-Copyright (C) 1993 Free Software Foundation
+/* Copyright (C) 1993, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU IO Library.
 
-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 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.
+   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.
+   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. */
+   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.
@@ -41,7 +42,9 @@ the executable file might be covered by the GNU General Public License. */
 
 /* Modified for GNU iostream by Per Bothner 1991, 1992. */
 
-#define _POSIX_SOURCE
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
 #include "libioP.h"
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -50,6 +53,11 @@ the executable file might be covered by the GNU General Public License. */
 #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.
@@ -59,21 +67,23 @@ the executable file might be covered by the GNU General Public License. */
  */
 
 int
-DEFUN(_IO_file_doallocate, (fp),
-      register _IO_FILE *fp)
+_IO_file_doallocate (fp)
+     _IO_FILE *fp;
 {
-  register _IO_size_t size;
+  _IO_size_t size;
   int couldbetty;
-  register char *p;
+  char *p;
   struct stat st;
 
+#ifndef _LIBC
   /* 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)();
-  
+    (*_IO_cleanup_registration_needed) ();
+#endif
+
   if (fp->_fileno < 0 || _IO_SYSSTAT (fp, &st) < 0)
     {
       couldbetty = 0;
@@ -85,18 +95,16 @@ DEFUN(_IO_file_doallocate, (fp),
     }
   else
     {
-      couldbetty = S_ISCHR(st.st_mode);
+      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
     }
-  p = ALLOC_BUF(size);
-  if (p == NULL)
-    return EOF;
-  _IO_setb(fp, p, p+size, 1);
-  if (couldbetty && isatty(fp->_fileno))
+  ALLOC_BUF (p, size, EOF);
+  _IO_setb (fp, p, p + size, 1);
+  if (couldbetty && isatty (fp->_fileno))
     fp->_flags |= _IO_LINE_BUF;
   return 1;
 }