/*
 *  $Id: fnmatch.c,v 0.0.0.1            2003/08/21 
 *
 *  DEBUG:  section 3                   
 *  AUTHOR: xxx, Petr Smolik            petr.smolik@wo.cz
 *
 *  ORTE - OCERA Real-Time Ethernet     http://www.ocera.org/
 *  --------------------------------------------------------------------
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *  
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 */ 

#include "orte_all.h"

/* Match STRING against the filename pattern PATTERN, returning zero if
   it matches, nonzero if not.  */
int
fnmatch (const char *pattern,const char *string,int flags ) {
    register const char *p = pattern, *n = string;
    register unsigned char c;

/* Note that this evalutes C many times.  */
#define FOLD(c) ((flags & FNM_CASEFOLD) && isupper (c) ? tolower (c) : (c))

#ifdef _WIN32_ORTE
    flags |= FNM_CASEFOLD;
#endif

    while ((c = *p++) != '\0')
    {
        c = FOLD (c);

        switch (c) {
            case '?':
                if (*n == '\0')
                    return FNM_NOMATCH;
                else if ((flags & FNM_FILE_NAME) && *n == '/')
                    return FNM_NOMATCH;
                else if ((flags & FNM_PERIOD) && *n == '.' &&
                    (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
                    return FNM_NOMATCH;
                break;

            case '\\':
                if (!(flags & FNM_NOESCAPE))
                {
                    c = *p++;
                    c = FOLD (c);
                }
                if (FOLD ((unsigned char)*n) != c)
                    return FNM_NOMATCH;
                break;

            case '*':
                if ((flags & FNM_PERIOD) && *n == '.' &&
                    (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
                    return FNM_NOMATCH;

                for (c = *p++; c == '?' || c == '*'; c = *p++, ++n)
                    if (((flags & FNM_FILE_NAME) && *n == '/') ||
                        (c == '?' && *n == '\0'))
                        return FNM_NOMATCH;

                if (c == '\0')
                    return 0;

                {
                    unsigned char c1 = (!(flags & FNM_NOESCAPE) && c == '\\') ? *p : c;
                    c1 = FOLD (c1);
                    for (--p; *n != '\0'; ++n)
                        if ((c == '[' || FOLD ((unsigned char)*n) == c1) &&
                            fnmatch (p, n, flags & ~FNM_PERIOD) == 0)
                            return 0;
                    return FNM_NOMATCH;
                }

            case '[':
                {
                    /* Nonzero if the sense of the character class is inverted.  */
                    register int not;

                    if (*n == '\0')
                        return FNM_NOMATCH;

                    if ((flags & FNM_PERIOD) && *n == '.' &&
                    (n == string || ((flags & FNM_FILE_NAME) && n[-1] == '/')))
                        return FNM_NOMATCH;

                    not = (*p == '!' || *p == '^');
                    if (not)
                        ++p;

                    c = *p++;
                    for (;;) {
                        register unsigned char cstart = c, cend = c;

                        if (!(flags & FNM_NOESCAPE) && c == '\\')
                            cstart = cend = *p++;

                        cstart = cend = FOLD (cstart);

                        if (c == '\0')
                        /* [ (unterminated) loses.  */
                            return FNM_NOMATCH;

                        c = *p++;
                        c = FOLD (c);

                        if ((flags & FNM_FILE_NAME) && c == '/')
                        /* [/] can never match.  */
                            return FNM_NOMATCH;

                        if (c == '-' && *p != ']')
                        {
                            cend = *p++;
                            if (!(flags & FNM_NOESCAPE) && cend == '\\')
                                cend = *p++;
                            if (cend == '\0')
                                return FNM_NOMATCH;
                            cend = FOLD (cend);

                            c = *p++;
                        }

                        if (FOLD ((unsigned char)*n) >= cstart
                        && FOLD ((unsigned char)*n) <= cend)
                            goto matched;

                        if (c == ']')
                            break;
                    }
                    if (!not)
                        return FNM_NOMATCH;
                    break;

                matched:;
                    /* Skip the rest of the [...] that already matched.  */
                    while (c != ']') {
                        if (c == '\0')
                        /* [... (unterminated) loses.  */
                            return FNM_NOMATCH;

                        c = *p++;
                        if (!(flags & FNM_NOESCAPE) && c == '\\')
                        /* XXX 1003.2d11 is unclear if this is right.  */
                        ++p;
                    }
                    if (not)
                        return FNM_NOMATCH;
                }
                break;

            default:
                if (c != FOLD ((unsigned char)*n))
                    return FNM_NOMATCH;
        }   // switch (c)

        ++n;
    }

    if (*n == '\0')
        return 0;

    if ((flags & FNM_LEADING_DIR) && *n == '/')
    /* The FNM_LEADING_DIR flag says that "foo*" matches "foobar/frobozz".  */
        return 0;

    return FNM_NOMATCH;
}