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659fe9fd | 1 | /* Final status reporting for struct __*printf_buffer. Generic version. |
6d7e8eda | 2 | Copyright (C) 2022-2023 Free Software Foundation, Inc. |
659fe9fd FW |
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 | ||
23 | int | |
24 | Xprintf_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 | } |