/*
 * 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 <fnmatch.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

struct testcase {
        const char *pattern;
        const char *string;
        int flags;
        int result;
} testcases[] = {
        { "", "", 0, 0 },
        { "a", "a", 0, 0 },
        { "a", "b", 0, FNM_NOMATCH },
        { "a", "A", 0, FNM_NOMATCH },
        { "*", "a", 0, 0 },
        { "*", "aa", 0, 0 },
        { "*a", "a", 0, 0 },
        { "*a", "b", 0, FNM_NOMATCH },
        { "*a*", "b", 0, FNM_NOMATCH },
        { "*a*b*", "ab", 0, 0 },
        { "*a*b*", "qaqbq", 0, 0 },
        { "*a*bb*", "qaqbqbbq", 0, 0 },
        { "*a*bc*", "qaqbqbcq", 0, 0 },
        { "*a*bb*", "qaqbqbb", 0, 0 },
        { "*a*bc*", "qaqbqbc", 0, 0 },
        { "*a*bb", "qaqbqbb", 0, 0 },
        { "*a*bc", "qaqbqbc", 0, 0 },
        { "*a*bb", "qaqbqbbq", 0, FNM_NOMATCH },
        { "*a*bc", "qaqbqbcq", 0, FNM_NOMATCH },
        { "*a*a*a*a*a*a*a*a*a*a*", "aaaaaaaaa", 0, FNM_NOMATCH },
        { "*a*a*a*a*a*a*a*a*a*a*", "aaaaaaaaaa", 0, 0 },
        { "*a*a*a*a*a*a*a*a*a*a*", "aaaaaaaaaaa", 0, 0 },
        { ".*.*.*.*.*.*.*.*.*.*", ".........", 0, FNM_NOMATCH },
        { ".*.*.*.*.*.*.*.*.*.*", "..........", 0, 0 },
        { ".*.*.*.*.*.*.*.*.*.*", "...........", 0, 0 },
        { "*?*?*?*?*?*?*?*?*?*?*", "123456789", 0, FNM_NOMATCH },
        { "??????????*", "123456789", 0, FNM_NOMATCH },
        { "*??????????", "123456789", 0, FNM_NOMATCH },
        { "*?*?*?*?*?*?*?*?*?*?*", "1234567890", 0, 0 },
        { "??????????*", "1234567890", 0, 0 },
        { "*??????????", "1234567890", 0, 0 },
        { "*?*?*?*?*?*?*?*?*?*?*", "12345678901", 0, 0 },
        { "??????????*", "12345678901", 0, 0 },
        { "*??????????", "12345678901", 0, 0 },
        { "[x]", "x", 0, 0 },
        { "[*]", "*", 0, 0 },
        { "[?]", "?", 0, 0 },
        { "[", "[", 0, 0 },
        { "[[]", "[", 0, 0 },
        { "[[]", "x", 0, FNM_NOMATCH },
        { "[*]", "", 0, FNM_NOMATCH },
        { "[*]", "x", 0, FNM_NOMATCH },
        { "[?]", "x", 0, FNM_NOMATCH },
        { "*[*]*", "foo*foo", 0, 0 },
        { "*[*]*", "foo", 0, FNM_NOMATCH },
        { "[0-9]", "0", 0, 0 },
        { "[0-9]", "5", 0, 0 },
        { "[0-9]", "9", 0, 0 },
        { "[0-9]", "/", 0, FNM_NOMATCH },
        { "[0-9]", ":", 0, FNM_NOMATCH },
        { "[0-9]", "*", 0, FNM_NOMATCH },
        { "[!0-9]", "0", 0, FNM_NOMATCH },
        { "[!0-9]", "5", 0, FNM_NOMATCH },
        { "[!0-9]", "9", 0, FNM_NOMATCH },
        { "[!0-9]", "/", 0, 0 },
        { "[!0-9]", ":", 0, 0 },
        { "[!0-9]", "*", 0, 0 },
        { "*[0-9]", "a0", 0, 0 },
        { "*[0-9]", "a5", 0, 0 },
        { "*[0-9]", "a9", 0, 0 },
        { "*[0-9]", "a/", 0, FNM_NOMATCH },
        { "*[0-9]", "a:", 0, FNM_NOMATCH },
        { "*[0-9]", "a*", 0, FNM_NOMATCH },
        { "*[!0-9]", "a0", 0, FNM_NOMATCH },
        { "*[!0-9]", "a5", 0, FNM_NOMATCH },
        { "*[!0-9]", "a9", 0, FNM_NOMATCH },
        { "*[!0-9]", "a/", 0, 0 },
        { "*[!0-9]", "a:", 0, 0 },
        { "*[!0-9]", "a*", 0, 0 },
        { "*[0-9]", "a00", 0, 0 },
        { "*[0-9]", "a55", 0, 0 },
        { "*[0-9]", "a99", 0, 0 },
        { "*[0-9]", "a0a0", 0, 0 },
        { "*[0-9]", "a5a5", 0, 0 },
        { "*[0-9]", "a9a9", 0, 0 },
        { "\\*", "*", 0, 0 },
        { "\\?", "?", 0, 0 },
        { "\\[x]", "[x]", 0, 0 },
        { "\\[", "[", 0, 0 },
        { "\\\\", "\\", 0, 0 },
        { "*\\**", "foo*foo", 0, 0 },
        { "*\\**", "foo", 0, FNM_NOMATCH },
        { "*\\\\*", "foo\\foo", 0, 0 },
        { "*\\\\*", "foo", 0, FNM_NOMATCH },
        { "\\(", "(", 0, 0 },
        { "\\a", "a", 0, 0 },
        { "\\*", "a", 0, FNM_NOMATCH },
        { "\\?", "a", 0, FNM_NOMATCH },
        { "\\*", "\\*", 0, FNM_NOMATCH },
        { "\\?", "\\?", 0, FNM_NOMATCH },
        { "\\[x]", "\\[x]", 0, FNM_NOMATCH },
        { "\\[x]", "\\x", 0, FNM_NOMATCH },
        { "\\[", "\\[", 0, FNM_NOMATCH },
        { "\\(", "\\(", 0, FNM_NOMATCH },
        { "\\a", "\\a", 0, FNM_NOMATCH },
        { "\\", "\\", 0, FNM_NOMATCH },
        { "\\", "", 0, FNM_NOMATCH },
        { "\\*", "\\*", FNM_NOESCAPE, 0 },
        { "\\?", "\\?", FNM_NOESCAPE, 0 },
        { "\\", "\\", FNM_NOESCAPE, 0 },
        { "\\\\", "\\", FNM_NOESCAPE, FNM_NOMATCH },
        { "\\\\", "\\\\", FNM_NOESCAPE, 0 },
        { "*\\*", "foo\\foo", FNM_NOESCAPE, 0 },
        { "*\\*", "foo", FNM_NOESCAPE, FNM_NOMATCH },
        { "*", ".", FNM_PERIOD, FNM_NOMATCH },
        { "?", ".", FNM_PERIOD, FNM_NOMATCH },
        { ".*", ".", 0, 0 },
        { ".*", "..", 0, 0 },
        { ".*", ".a", 0, 0 },
        { "[0-9]", ".", FNM_PERIOD, FNM_NOMATCH },
        { "a*", "a.", 0, 0 },
        { "a/a", "a/a", FNM_PATHNAME, 0 },
        { "a/*", "a/a", FNM_PATHNAME, 0 },
        { "*/a", "a/a", FNM_PATHNAME, 0 },
        { "*/*", "a/a", FNM_PATHNAME, 0 },
        { "a*b/*", "abbb/x", FNM_PATHNAME, 0 },
        { "a*b/*", "abbb/.x", FNM_PATHNAME, 0 },
        { "*", "a/a", FNM_PATHNAME, FNM_NOMATCH },
        { "*/*", "a/a/a", FNM_PATHNAME, FNM_NOMATCH },
        { "b/*", "b/.x", FNM_PATHNAME | FNM_PERIOD, FNM_NOMATCH },
        { "b*/*", "a/.x", FNM_PATHNAME | FNM_PERIOD, FNM_NOMATCH },
        { "b/.*", "b/.x", FNM_PATHNAME | FNM_PERIOD, 0 },
        { "b*/.*", "b/.x", FNM_PATHNAME | FNM_PERIOD, 0 },
        { "a", "A", FNM_CASEFOLD, 0 },
        { "A", "a", FNM_CASEFOLD, 0 },
        { "[a]", "A", FNM_CASEFOLD, 0 },
        { "[A]", "a", FNM_CASEFOLD, 0 },
        { "a", "b", FNM_CASEFOLD, FNM_NOMATCH },
        { "a", "a/b", FNM_PATHNAME, FNM_NOMATCH },
        { "*", "a/b", FNM_PATHNAME, FNM_NOMATCH },
        { "*b", "a/b", FNM_PATHNAME, FNM_NOMATCH },
        { "a", "a/b", FNM_PATHNAME | FNM_LEADING_DIR, 0 },
        { "*", "a/b", FNM_PATHNAME | FNM_LEADING_DIR, 0 },
        { "*", ".a/b", FNM_PATHNAME | FNM_LEADING_DIR, 0 },
        { "*a", ".a/b", FNM_PATHNAME | FNM_LEADING_DIR, 0 },
        { "*", ".a/b", FNM_PATHNAME | FNM_PERIOD | FNM_LEADING_DIR,
            FNM_NOMATCH },
        { "*a", ".a/b", FNM_PATHNAME | FNM_PERIOD | FNM_LEADING_DIR,
            FNM_NOMATCH },
        { "a*b/*", "abbb/.x", FNM_PATHNAME | FNM_PERIOD, FNM_NOMATCH },
};

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\0"
            "FNM_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)
                (void) sprintf(p, "%d", flags);
        else
                *p = '\0';
        return (result);
}

int
main(void)
{
        size_t i;
        int flags, result;
        int ret = 0;
        struct testcase *t;

        for (i = 0; i < sizeof (testcases) / sizeof (struct testcase); 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);

                if (result != t->result) {
                        printf("fnmatch(\"%s\", \"%s\", %s) != %d (was %d)\n",
                            t->pattern, t->string, flags_to_string(flags),
                            t->result, result);
                        ret = 1;
                }
        }

        return (ret);
}