/*-
 * Copyright (c) 2010 Jilles Tjoelker
 * 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 <sys/param.h>
#include <errno.h>
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#include <atf-c.h>

#include "fnmatch_testcases.h"

static const char *
flags_to_string(int flags)
{
        static const int flagvalues[] = { FNM_NOESCAPE, FNM_PATHNAME,
                FNM_PERIOD, FNM_LEADING_DIR, FNM_CASEFOLD, 0 };
        static const char flagnames[] = "FNM_NOESCAPE\0FNM_PATHNAME\0FNM_PERIOD\0FNM_LEADING_DIR\0FNM_CASEFOLD\0";
        static char result[sizeof(flagnames) + 3 * sizeof(int) + 2];
        char *p;
        size_t i, len;
        const char *fp;

        p = result;
        fp = flagnames;
        for (i = 0; flagvalues[i] != 0; i++) {
                len = strlen(fp);
                if (flags & flagvalues[i]) {
                        if (p != result)
                                *p++ = '|';
                        memcpy(p, fp, len);
                        p += len;
                        flags &= ~flagvalues[i];
                }
                fp += len + 1;
        }
        if (p == result)
                memcpy(p, "0", 2);
        else if (flags != 0)
                sprintf(p, "%d", flags);
        else
                *p = '\0';
        return result;
}

ATF_TC_WITHOUT_HEAD(fnmatch_test);
ATF_TC_BODY(fnmatch_test, tc)
{
        size_t i;
        int flags, result;
        struct testcase *t;

        for (i = 0; i < nitems(testcases); i++) {
                t = &testcases[i];
                flags = t->flags;
                do {
                        result = fnmatch(t->pattern, t->string, flags);
                        if (result != t->result)
                                break;
                        if (strchr(t->pattern, '\\') == NULL &&
                            !(flags & FNM_NOESCAPE)) {
                                flags |= FNM_NOESCAPE;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if (strchr(t->pattern, '\\') != NULL &&
                            strchr(t->string, '\\') == NULL &&
                            t->result == FNM_NOMATCH &&
                            !(flags & (FNM_NOESCAPE | FNM_LEADING_DIR))) {
                                flags |= FNM_NOESCAPE;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if ((t->string[0] != '.' || t->pattern[0] == '.' ||
                            t->result == FNM_NOMATCH) &&
                            !(flags & (FNM_PATHNAME | FNM_PERIOD))) {
                                flags |= FNM_PERIOD;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if ((strchr(t->string, '/') == NULL ||
                            t->result == FNM_NOMATCH) &&
                            !(flags & FNM_PATHNAME)) {
                                flags |= FNM_PATHNAME;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if ((((t->string[0] != '.' || t->pattern[0] == '.') &&
                            strstr(t->string, "/.") == NULL) ||
                            t->result == FNM_NOMATCH) &&
                            flags & FNM_PATHNAME && !(flags & FNM_PERIOD)) {
                                flags |= FNM_PERIOD;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if ((((t->string[0] != '.' || t->pattern[0] == '.') &&
                            strchr(t->string, '/') == NULL) ||
                            t->result == FNM_NOMATCH) &&
                            !(flags & (FNM_PATHNAME | FNM_PERIOD))) {
                                flags |= FNM_PATHNAME | FNM_PERIOD;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if ((strchr(t->string, '/') == NULL || t->result == 0)
                            && !(flags & FNM_LEADING_DIR)) {
                                flags |= FNM_LEADING_DIR;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if (t->result == 0 && !(flags & FNM_CASEFOLD)) {
                                flags |= FNM_CASEFOLD;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                        if (strchr(t->pattern, '\\') == NULL &&
                            t->result == 0 &&
                            !(flags & (FNM_NOESCAPE | FNM_CASEFOLD))) {
                                flags |= FNM_NOESCAPE | FNM_CASEFOLD;
                                result = fnmatch(t->pattern, t->string, flags);
                                if (result != t->result)
                                        break;
                                flags = t->flags;
                        }
                } while (0);

                ATF_CHECK(result == t->result);
                if (result == t->result)
                        printf("fnmatch(\"%s\", \"%s\", %s) == %d\n",
                            t->pattern, t->string, flags_to_string(flags), result);
                else
                        printf("fnmatch(\"%s\", \"%s\", %s) != %d (was %d)\n",
                            t->pattern, t->string, flags_to_string(flags),
                            t->result, result);
        }

}

ATF_TC(fnmatch_characterclass);
ATF_TC_HEAD(fnmatch_characterclass, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test fnmatch with character classes");
}

ATF_TC_BODY(fnmatch_characterclass, tc)
{
        ATF_CHECK(fnmatch("[[:alnum:]]", "a", 0) == 0);
        ATF_CHECK(fnmatch("[[:cntrl:]]", "\a", 0) == 0);
        ATF_CHECK(fnmatch("[[:lower:]]", "a", 0) == 0);
        ATF_CHECK(fnmatch("[[:space:]]", " ", 0) == 0);
        ATF_CHECK(fnmatch("[[:alpha:]]", "a", 0) == 0);
        ATF_CHECK(fnmatch("[[:digit:]]", "0", 0) == 0);
        ATF_CHECK(fnmatch("[[:print:]]", "a", 0) == 0);
        ATF_CHECK(fnmatch("[[:upper:]]", "A", 0) == 0);
        ATF_CHECK(fnmatch("[[:blank:]]", " ", 0) == 0);
        ATF_CHECK(fnmatch("[[:graph:]]", "a", 0) == 0);
        ATF_CHECK(fnmatch("[[:punct:]]", ".", 0) == 0);
        ATF_CHECK(fnmatch("[[:xdigit:]]", "f", 0) == 0);

        /*
         * POSIX.1, section 9.3.5. states that '[:' and ':]'
         * should be interpreted as character classes symbol only
         * when part of a bracket expression.
         */
        ATF_CHECK(fnmatch("[:alnum:]", "a", 0) == 0);
        ATF_CHECK(fnmatch("[:alnum:]", ":", 0) == 0);
        ATF_CHECK(fnmatch("[:alnum:]", "1", 0) != 0);
}

ATF_TC(fnmatch_collsym);
ATF_TC_HEAD(fnmatch_collsym, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test fnmatch with collating symbols");
}

ATF_TC_BODY(fnmatch_collsym, tc)
{
        setlocale(LC_ALL, "cs_CZ.UTF-8");
        ATF_CHECK(fnmatch("[ch]", "ch", 0) != 0);
        ATF_CHECK(fnmatch("[[.ch.]]", "ch", 0) == 0);
        ATF_CHECK(fnmatch("[[.ch.]]h", "chh", 0) == 0);

        /*
         * POSIX.1, section 9.3.5. states that '[.' and '.]'
         * should be interpreted as a collating symbol only
         * when part of a bracket expression.
         */
        ATF_CHECK(fnmatch("[.ch.]", "c", 0) == 0);
        ATF_CHECK(fnmatch("[.ch.]", "h", 0) == 0);
        ATF_CHECK(fnmatch("[.ch.]", ".", 0) == 0);
}

ATF_TC(fnmatch_equivclass);
ATF_TC_HEAD(fnmatch_equivclass, tc)
{
        atf_tc_set_md_var(tc, "descr", "Test fnmatch with equivalence classes");
}

ATF_TC_BODY(fnmatch_equivclass, tc)
{
        setlocale(LC_ALL, "en_US.UTF-8");
        ATF_CHECK(fnmatch("[[=a=]]b", "ab", 0) == 0);
        ATF_CHECK(fnmatch("[[=a=]]b", "Ab", 0) == 0);
        ATF_CHECK(fnmatch("[[=à=]]b", "ab", 0) == 0);
        ATF_CHECK(fnmatch("[[=a=]]b", "àb", 0) == 0);

        /*
         * POSIX.1, section 9.3.5. states that '[=' and '=]'
         * should be interpreted as an equivalence class only
         * when part of a bracket expression.
         */
        ATF_CHECK(fnmatch("[=a=]b", "=b", 0) == 0);
        ATF_CHECK(fnmatch("[=a=]b", "ab", 0) == 0);
}

ATF_TP_ADD_TCS(tp)
{

        ATF_TP_ADD_TC(tp, fnmatch_test);
        ATF_TP_ADD_TC(tp, fnmatch_collsym);
        ATF_TP_ADD_TC(tp, fnmatch_characterclass);
        ATF_TP_ADD_TC(tp, fnmatch_equivclass);

        return (atf_no_error());
}