/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2025 Ricardo Branco <rbranco@suse.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

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

#include <atf-c.h>

static void
test_roundtrip(int signum)
{
        char str[SIG2STR_MAX];
        int sig;

        ATF_REQUIRE_EQ_MSG(sig2str(signum, str), 0,
            "sig2str(%d) failed", signum);
        ATF_REQUIRE_EQ_MSG(str2sig(str, &sig), 0,
            "str2sig(\"%s\") failed", str);
        ATF_REQUIRE_INTEQ_MSG(sig, signum,
            "Mismatch: roundtrip conversion gave %d instead of %d",
            sig, signum);
}

ATF_TC_WITHOUT_HEAD(sig2str_valid);
ATF_TC_BODY(sig2str_valid, tc)
{
        int sig;

        for (sig = 1; sig < sys_nsig; sig++) {
                test_roundtrip(sig);
        }
}

ATF_TC_WITHOUT_HEAD(sig2str_invalid);
ATF_TC_BODY(sig2str_invalid, tc)
{
        char buf[SIG2STR_MAX];

        ATF_CHECK(sig2str(0, buf) != 0);
        ATF_CHECK(sig2str(-1, buf) != 0);
        ATF_CHECK(sig2str(SIGRTMAX + 1, buf) != 0);
}

ATF_TC_WITHOUT_HEAD(str2sig_rtmin_rtmax);
ATF_TC_BODY(str2sig_rtmin_rtmax, tc)
{
        int sig;

        ATF_CHECK_MSG(str2sig("RTMIN", &sig) == 0,
            "str2sig(\"RTMIN\") failed");
        ATF_CHECK_INTEQ_MSG(sig, SIGRTMIN,
            "RTMIN mapped to %d, expected %d", sig, SIGRTMIN);

        ATF_CHECK_MSG(str2sig("RTMAX", &sig) == 0,
            "str2sig(\"RTMAX\") failed");
        ATF_CHECK_INTEQ_MSG(sig, SIGRTMAX,
            "RTMAX mapped to %d, expected %d", sig, SIGRTMAX);

        ATF_CHECK_MSG(str2sig("RTMIN+1", &sig) == 0,
            "str2sig(\"RTMIN+1\") failed");
        ATF_CHECK_INTEQ_MSG(sig, SIGRTMIN + 1,
            "RTMIN+1 mapped to %d, expected %d", sig, SIGRTMIN + 1);

        ATF_CHECK_MSG(str2sig("RTMAX-1", &sig) == 0,
            "str2sig(\"RTMAX-1\") failed");
        ATF_CHECK_INTEQ_MSG(sig, SIGRTMAX - 1,
            "RTMAX-1 mapped to %d, expected %d", sig, SIGRTMAX - 1);
}

ATF_TC_WITHOUT_HEAD(str2sig_invalid_rt);
ATF_TC_BODY(str2sig_invalid_rt, tc)
{
        int i, sig;

        const char *invalid[] = {
                "RTMIN+0",
                "RTMAX-0",
                "RTMIN-777",
                "RTMIN+777",
                "RTMAX-777",
                "RTMAX+777",
                "RTMIN-",
                "RTMAX-",
                "RTMIN0",
                "RTMAX1",
                "RTMIN+abc",
                "RTMIN-abc",
                NULL
        };

        for (i = 0; invalid[i] != NULL; i++) {
                ATF_CHECK_MSG(str2sig(invalid[i], &sig) != 0,
                    "str2sig(\"%s\") unexpectedly succeeded", invalid[i]);
        }
}

ATF_TC_WITHOUT_HEAD(str2sig_fullname);
ATF_TC_BODY(str2sig_fullname, tc)
{
        char fullname[SIG2STR_MAX + 3];
        int n, sig;

        for (sig = 1; sig < sys_nsig; sig++) {
                snprintf(fullname, sizeof(fullname), "SIG%s", sys_signame[sig]);

                ATF_CHECK_MSG(str2sig(fullname, &n) == 0,
                    "str2sig(\"%s\") failed with errno %d (%s)",
                    fullname, errno, strerror(errno));

                ATF_CHECK_INTEQ_MSG(n, sig,
                    "Mismatch: %s = %d, str2sig(\"%s\") = %d",
                    sys_signame[sig], sig, fullname, n);
        }
}

ATF_TC_WITHOUT_HEAD(str2sig_lowercase);
ATF_TC_BODY(str2sig_lowercase, tc)
{
        char fullname[SIG2STR_MAX + 3];
        int n, sig;

        for (sig = 1; sig < sys_nsig; sig++) {
                snprintf(fullname, sizeof(fullname), "sig%s", sys_signame[sig]);
                for (size_t i = 3; i < strlen(fullname); i++)
                        fullname[i] = toupper((unsigned char)fullname[i]);

                ATF_CHECK_MSG(str2sig(fullname, &n) == 0,
                    "str2sig(\"%s\") failed with errno %d (%s)",
                    fullname, errno, strerror(errno));

                ATF_CHECK_INTEQ_MSG(n, sig,
                    "Mismatch: %s = %d, str2sig(\"%s\") = %d",
                    sys_signame[sig], sig, fullname, n);
        }
}

ATF_TC_WITHOUT_HEAD(str2sig_numeric);
ATF_TC_BODY(str2sig_numeric, tc)
{
        char buf[16];
        int n, sig;

        for (sig = NSIG; sig < SIGRTMIN; sig++) {
                snprintf(buf, sizeof(buf), "%d", sig);
                ATF_CHECK_MSG(str2sig(buf, &n) == 0,
                    "str2sig(\"%s\") failed", buf);
                ATF_CHECK_INTEQ_MSG(n, sig,
                    "Mismatch: str2sig(\"%s\") = %d, expected %d",
                    buf, n, sig);
        }
}

ATF_TC_WITHOUT_HEAD(str2sig_invalid);
ATF_TC_BODY(str2sig_invalid, tc)
{
        const char *invalid[] = {
                "SIGDOESNOTEXIST",
                "DOESNOTEXIST",
                "INTERRUPT",
                "",
                "SIG",
                "123abc",
                "sig1extra",
                NULL
        };
        int i, sig;

        for (i = 0; invalid[i] != NULL; i++) {
                ATF_CHECK_MSG(str2sig(invalid[i], &sig) != 0,
                    "str2sig(\"%s\") unexpectedly succeeded", invalid[i]);
        }
}

ATF_TP_ADD_TCS(tp)
{
        ATF_TP_ADD_TC(tp, sig2str_valid);
        ATF_TP_ADD_TC(tp, sig2str_invalid);
        ATF_TP_ADD_TC(tp, str2sig_rtmin_rtmax);
        ATF_TP_ADD_TC(tp, str2sig_invalid_rt);
        ATF_TP_ADD_TC(tp, str2sig_fullname);
        ATF_TP_ADD_TC(tp, str2sig_lowercase);
        ATF_TP_ADD_TC(tp, str2sig_numeric);
        ATF_TP_ADD_TC(tp, str2sig_invalid);
        return (atf_no_error());
}