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/*
* ngtcp2
*
* Copyright (c) 2022 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "ngtcp2_unreachable.h"
#include <stdio.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include <stdlib.h>
#ifdef WIN32
# include <io.h>
#endif /* WIN32 */
void ngtcp2_unreachable_fail(const char *file, int line, const char *func) {
char *buf;
size_t buflen;
int rv;
#define NGTCP2_UNREACHABLE_TEMPLATE "%s:%d %s: Unreachable.\n"
rv = snprintf(NULL, 0, NGTCP2_UNREACHABLE_TEMPLATE, file, line, func);
if (rv < 0) {
abort();
}
/* here we explicitly use system malloc */
buflen = (size_t)rv + 1;
buf = malloc(buflen);
if (buf == NULL) {
abort();
}
rv = snprintf(buf, buflen, NGTCP2_UNREACHABLE_TEMPLATE, file, line, func);
if (rv < 0) {
abort();
}
#ifndef WIN32
while (write(STDERR_FILENO, buf, (size_t)rv) == -1 && errno == EINTR)
;
#else /* WIN32 */
_write(_fileno(stderr), buf, (unsigned int)rv);
#endif /* WIN32 */
free(buf);
abort();
}
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