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6d7e8eda | 1 | /* Copyright (C) 1994-2023 Free Software Foundation, Inc. |
41bdb6e2 | 2 | This file is part of the GNU C Library. |
d64b6ad0 | 3 | |
41bdb6e2 AJ |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public | |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
d64b6ad0 | 8 | |
41bdb6e2 AJ |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
d64b6ad0 | 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
41bdb6e2 AJ |
12 | Lesser General Public License for more details. |
13 | ||
14 | You should have received a copy of the GNU Lesser General Public | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. |
41bdb6e2 AJ |
17 | |
18 | As a special exception, if you link the code in this file with | |
19 | files compiled with a GNU compiler to produce an executable, | |
20 | that does not cause the resulting executable to be covered by | |
21 | the GNU Lesser General Public License. This exception does not | |
22 | however invalidate any other reasons why the executable file | |
23 | might be covered by the GNU Lesser General Public License. | |
24 | This exception applies to code released by its copyright holders | |
25 | in files containing the exception. */ | |
d64b6ad0 | 26 | |
118816de FW |
27 | #include <errno.h> |
28 | #include <math_ldbl_opt.h> | |
29 | #include <printf.h> | |
30 | #include <printf_buffer.h> | |
d64b6ad0 UD |
31 | |
32 | int | |
698fb75b ZW |
33 | __vswprintf_internal (wchar_t *string, size_t maxlen, const wchar_t *format, |
34 | va_list args, unsigned int mode_flags) | |
d64b6ad0 | 35 | { |
d64b6ad0 | 36 | if (maxlen == 0) |
5569e0a6 UD |
37 | /* Since we have to write at least the terminating L'\0' a buffer |
38 | length of zero always makes the function fail. */ | |
39 | return -1; | |
d64b6ad0 | 40 | |
118816de FW |
41 | struct __wprintf_buffer buf; |
42 | __wprintf_buffer_init (&buf, string, maxlen, __wprintf_buffer_mode_swprintf); | |
d64b6ad0 | 43 | |
118816de FW |
44 | __wprintf_buffer (&buf, format, args, mode_flags); |
45 | ||
46 | if (buf.write_ptr == buf.write_end) | |
47 | { | |
48 | /* Buffer has been filled exactly, excluding the null wide | |
49 | character. This is an error because the null wide character | |
50 | is required. */ | |
51 | buf.write_end[-1] = L'\0'; | |
52 | return -1; | |
53 | } | |
5569e0a6 | 54 | |
118816de | 55 | buf.write_ptr[0] = L'\0'; |
5569e0a6 | 56 | |
118816de | 57 | return __wprintf_buffer_done (&buf); |
d64b6ad0 | 58 | } |
698fb75b ZW |
59 | |
60 | int | |
61 | __vswprintf (wchar_t *string, size_t maxlen, const wchar_t *format, | |
62 | va_list args) | |
63 | { | |
64 | return __vswprintf_internal (string, maxlen, format, args, 0); | |
65 | } | |
66 | ldbl_weak_alias (__vswprintf, vswprintf) |