2 dropin.c -- a set of drop-in replacements for libc functions
3 Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
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.
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.
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.
25 int asprintf(char **buf, const char *fmt, ...) {
29 result = vasprintf(buf, fmt, ap);
34 int vasprintf(char **buf, const char *fmt, va_list ap) {
43 status = vsnprintf(*buf, len, fmt, aq);
47 *buf = xrealloc(*buf, status + 1);
50 if(status > len - 1) {
53 status = vsnprintf(*buf, len, fmt, aq);
61 #ifndef HAVE_GETTIMEOFDAY
62 int gettimeofday(struct timeval *tv, void *tz) {
65 GetSystemTimeAsFileTime(&ft);
66 uint64_t lt = (uint64_t)ft.dwLowDateTime | ((uint64_t)ft.dwHighDateTime << 32);
67 lt -= 116444736000000000ULL;
68 tv->tv_sec = lt / 10000000;
69 tv->tv_usec = (lt / 10) % 1000000;
71 #warning No high resolution time source!
72 tv->tv_sec = time(NULL);
80 int usleep(long long usec) {
81 struct timeval tv = {usec / 1000000, (usec / 1000) % 1000};
82 select(0, NULL, NULL, NULL, &tv);