1 /* Print output of stream to given obstack.
2 Copyright (C) 1996,1997,1999,2000,2001,2002,2003,2004,2005,2006,2008
3 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
24 #include "../libio/strfile.h"
30 #include <stdio_ext.h>
33 struct _IO_obstack_file
35 struct _IO_FILE_plus file;
36 struct obstack *obstack;
39 extern const struct _IO_jump_t _IO_obstack_jumps attribute_hidden;
42 __obstack_vprintf_chk (struct obstack *obstack, int flags, const char *format,
47 struct _IO_obstack_file ofile;
54 new_f.ofile.file.file._lock = NULL;
57 _IO_no_init (&new_f.ofile.file.file, _IO_USER_LOCK, -1, NULL, NULL);
58 _IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps;
59 room = obstack_room (obstack);
60 size = obstack_object_size (obstack) + room;
63 /* We have to handle the allocation a bit different since the
64 `_IO_str_init_static' function would handle a size of zero
65 different from what we expect. */
67 /* Get more memory. */
68 obstack_make_room (obstack, 64);
70 /* Recompute how much room we have. */
71 room = obstack_room (obstack);
77 _IO_str_init_static_internal ((struct _IO_strfile_ *) &new_f.ofile,
78 obstack_base (obstack),
79 size, obstack_next_free (obstack));
80 /* Now allocate the rest of the current chunk. */
81 assert (size == (new_f.ofile.file.file._IO_write_end
82 - new_f.ofile.file.file._IO_write_base));
83 assert (new_f.ofile.file.file._IO_write_ptr
84 == (new_f.ofile.file.file._IO_write_base
85 + obstack_object_size (obstack)));
86 obstack_blank_fast (obstack, room);
88 new_f.ofile.obstack = obstack;
90 /* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
91 can only come from read-only format strings. */
93 new_f.ofile.file.file._flags2 |= _IO_FLAGS2_FORTIFY;
95 result = INTUSE(_IO_vfprintf) (&new_f.ofile.file.file, format, args);
97 /* Shrink the buffer to the space we really currently need. */
98 obstack_blank_fast (obstack, (new_f.ofile.file.file._IO_write_ptr
99 - new_f.ofile.file.file._IO_write_end));
103 libc_hidden_def (__obstack_vprintf_chk)
107 __obstack_printf_chk (struct obstack *obstack, int flags, const char *format,
112 va_start (ap, format);
113 result = __obstack_vprintf_chk (obstack, flags, format, ap);