1 /*
2 * Copyright 2003-2021 The Music Player Daemon Project
3 * http://www.musicpd.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program 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
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include "FormatString.hxx"
21 #include "AllocatedString.hxx"
22
23 #include <stdio.h>
24 #include <stdlib.h>
25
26 AllocatedString
FormatStringV(const char * fmt,std::va_list args)27 FormatStringV(const char *fmt, std::va_list args) noexcept
28 {
29 std::va_list tmp;
30 va_copy(tmp, args);
31 const int length = vsnprintf(nullptr, 0, fmt, tmp);
32 va_end(tmp);
33
34 if (length <= 0)
35 /* wtf.. */
36 abort();
37
38 char *buffer = new char[length + 1];
39 vsnprintf(buffer, length + 1, fmt, args);
40 return AllocatedString::Donate(buffer);
41 }
42
43 AllocatedString
FormatString(const char * fmt,...)44 FormatString(const char *fmt, ...) noexcept
45 {
46 std::va_list args;
47 va_start(args, fmt);
48 auto p = FormatStringV(fmt, args);
49 va_end(args);
50 return p;
51 }
52