/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: unixff.cpp,v 1.1.1.1.50.3 2004/07/09 01:44:23 hubbe Exp $
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/* Parts of pmatch() are copyright: */

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 <stdlib.h>
#include <string.h>

#include "findfile.h"
#include "platform/unix/unixff.h"

CUnixFindFile::CUnixFindFile (   const char *path,
				const char *delimiter,
				const char *pattern) : 
    CFindFile (path, delimiter, pattern)
{
    // initialize platform-specific variables 
    m_dirHandle = NULL;
    m_dirEntry = NULL;
}


CUnixFindFile::~CUnixFindFile()
{
    if (m_dirHandle != NULL)
    {
        OS_CloseDirectory();
    }
}

//
// Open the directory; initialize the directory handle.
// Return FALSE if the directory couldn't be opened.
//
BOOL CUnixFindFile::OS_OpenDirectory (const char *dirname)
{
    // don't call this before calling CloseDirectory()!
    if (m_dirHandle != NULL)
	return FALSE;

    m_dirHandle = opendir (dirname);
    return (m_dirHandle == NULL ? FALSE:TRUE);
}

//
// Get the next file in the directory.  This *does not*
// filter out based on the pattern; every file is returned.
//
char* CUnixFindFile::OS_GetNextFile()
{
    if (!m_dirHandle)
	return NULL;

    m_dirEntry = readdir (m_dirHandle);
    if (m_dirEntry != NULL)
	return (m_dirEntry->d_name);
    else
	return NULL;
}

//
// release the directory
//
void CUnixFindFile::OS_CloseDirectory ()
{
    if (m_dirHandle)
	closedir (m_dirHandle);

    m_dirHandle = NULL;
}

BOOL CUnixFindFile::OS_InitPattern ()
{
    return (TRUE);
}

static int
pmatch(const char* pattern, const char* string)
{
    const char *p, *q;
    char c;

    p = pattern;
    q = string;
    for (;;) {
	switch (c = *p++) {
	case '\0':
	    goto breakloop;
	case '?':
	    if (*q++ == '\0')
		return 0;
	break;
	case '*':
	    c = *p;
	    if (c != '?' && c != '*' && c != '[') {
		while (*q != c) {
		    if (*q == '\0')
			return 0;
		    q++;
		}
	    }
	    do {
		if (pmatch(p, q))
		    return 1;
	    } while (*q++ != '\0');
	return 0;
	case '[': {
		const char *endp;
		int invert, found;
		char chr;

		endp = p;
		if (*endp == '!')
			endp++;
		for (;;) {
			if (*endp == '\0')
				goto dft;		/* no matching ] */
			if (*++endp == ']')
				break;
		}
		invert = 0;
		if (*p == '!') {
			invert++;
			p++;
		}
		found = 0;
		chr = *q++;
		if (chr == '\0')
			return 0;
		c = *p++;
		do {
		    if (*p == '-' && p[1] != ']') {
			p++;
#if 0
			if (   collate_range_cmp(chr, c) >= 0
			    && collate_range_cmp(chr, *p) <= 0
			   )
			    found = 1;
#endif
			p++;
		    } else {
			if (chr == c)
			    found = 1;
		    }
		} while ((c = *p++) != ']');
		if (found == invert)
		    return 0;
		break;
	    }
	    dft:
	    default:
		if (*q++ != c)
		    return 0;
	    break;
	}
    }
breakloop:
    if (*q != '\0')
	return 0;
    return 1;
}

BOOL CUnixFindFile::OS_FileMatchesPattern (const char * fname)
{
    return pmatch(m_pattern, fname);
}

void CUnixFindFile::OS_FreePattern ()
{
}


