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-rw-r--r--libio/wfiledoalloc.c32
1 files changed, 9 insertions, 23 deletions
diff --git a/libio/wfiledoalloc.c b/libio/wfiledoalloc.c
index 2f8140b0ac..67a05175b2 100644
--- a/libio/wfiledoalloc.c
+++ b/libio/wfiledoalloc.c
@@ -1,4 +1,5 @@
-/* Copyright (C) 1993, 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1993, 1997, 1999, 2000, 2002, 2006
+ Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -85,35 +86,20 @@ _IO_wfile_doallocate (fp)
_IO_FILE *fp;
{
_IO_size_t size;
- int couldbetty;
wchar_t *p;
- struct _G_stat64 st;
/* Allocate room for the external buffer. */
if (fp->_IO_buf_base == NULL)
INTUSE(_IO_file_doallocate) (fp);
- 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
- }
+ /* If narrow buffer is user allocated (set by setvbuf etc.),
+ use that size as the size of the wide buffer, when it is
+ allocated by _IO_file_doallocate, multiply that by size
+ of the wide character. */
+ size = fp->_IO_buf_end - fp->_IO_buf_base;
+ if ((fp->_flags & _IO_USER_BUF))
+ size = (size + sizeof (wchar_t) - 1) / sizeof (wchar_t);
ALLOC_WBUF (p, size * sizeof (wchar_t), EOF);
INTUSE(_IO_wsetb) (fp, p, p + size, 1);
- if (couldbetty && isatty (fp->_fileno))
- fp->_flags |= _IO_LINE_BUF;
return 1;
}