/* Copyright (c) 2022 Dennis Wölfing
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/* libc/src/signal/sig2str.c
 * Translate a signal number to a signal name.
 */

#include <signal.h>
#include <stdio.h>
#include <string.h>

extern const char* const __signalnames[NSIG];

int sig2str(int signum, char* str) {
    if (signum > SIGRTMIN && signum <= (SIGRTMIN + SIGRTMAX) / 2) {
        snprintf(str, SIG2STR_MAX, "RTMIN+%d", signum - SIGRTMIN);
        return 0;
    } else if (signum > (SIGRTMIN + SIGRTMAX) / 2 && signum < SIGRTMAX) {
        snprintf(str, SIG2STR_MAX, "RTMAX-%d", SIGRTMAX - signum);
        return 0;
    } else if (signum >= 0 && signum < NSIG) {
        strcpy(str, __signalnames[signum]);
        return 0;
    }
    return -1;
}
