1/* Final status reporting for struct __*printf_buffer. Generic version.
2 Copyright (C) 2022-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <intprops.h>
21#include <stdint.h>
22
23int
24Xprintf_buffer_done (struct Xprintf_buffer *buf)
25{
26 if (Xprintf_buffer_has_failed (buf))
27 return -1;
28
29 /* Use uintptr_t here because for sprintf, the buffer range may
30 cover more than half of the address space. */
31 uintptr_t written_current = buf->write_ptr - buf->write_base;
32 int written_total;
33 if (INT_ADD_WRAPV (buf->written, written_current, &written_total))
34 {
35 __set_errno (EOVERFLOW);
36 return -1;
37 }
38 else
39 return written_total;
40}
41