2 ab1569ee 2023-05-06 op * Copyright (c) 2015 Ingo Schwarze <schwarze@openbsd.org>
4 ab1569ee 2023-05-06 op * Permission to use, copy, modify, and distribute this software for any
5 ab1569ee 2023-05-06 op * purpose with or without fee is hereby granted, provided that the above
6 ab1569ee 2023-05-06 op * copyright notice and this permission notice appear in all copies.
8 ab1569ee 2023-05-06 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 ab1569ee 2023-05-06 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 ab1569ee 2023-05-06 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 ab1569ee 2023-05-06 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 ab1569ee 2023-05-06 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 ab1569ee 2023-05-06 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 ab1569ee 2023-05-06 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 ab1569ee 2023-05-06 op * This fallback implementation is not efficient:
17 ab1569ee 2023-05-06 op * It does the formatting twice.
18 ab1569ee 2023-05-06 op * Short of fiddling with the unknown internals of the system's
19 ab1569ee 2023-05-06 op * printf(3) or completely reimplementing printf(3), i can't think
20 ab1569ee 2023-05-06 op * of another portable solution.
23 ab1569ee 2023-05-06 op #include <stdarg.h>
24 ab1569ee 2023-05-06 op #include <stdio.h>
25 ab1569ee 2023-05-06 op #include <stdlib.h>
28 ab1569ee 2023-05-06 op vasprintf(char **ret, const char *format, va_list ap)
34 ab1569ee 2023-05-06 op va_copy(ap2, ap);
35 ab1569ee 2023-05-06 op sz = vsnprintf(buf, sizeof(buf), format, ap2);
38 ab1569ee 2023-05-06 op if (sz != -1 && (*ret = malloc(sz + 1)) != NULL) {
39 ab1569ee 2023-05-06 op if (vsnprintf(*ret, sz + 1, format, ap) == sz)