/* $Id: kLdrHlpPath.c 2944 2007-01-13 15:55:40Z bird $ */
/** @file
 *
 * kLdr - The Dynamic Loader, Path Helper Functions.
 *
 * Copyright (c) 2006-2007 knut st. osmundsen <bird-kbuild-src@anduin.net>
 *
 *
 * This file is part of kLdr.
 *
 * kLdr 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.
 *
 * kLdr 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with kLdr; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */


/*******************************************************************************
*   Header Files                                                               *
*******************************************************************************/
#include <kLdr.h>
#include "kLdrHlp.h"


/**
 * Get the pointer to the filename part of the name.
 *
 * @returns Pointer to where the filename starts within the string pointed to by pszFilename.
 * @returns Pointer to the terminator char if no filename.
 * @param   pszFilename     The filename to parse.
 */
char   *kldrHlpGetFilename(const char *pszFilename)
{
    const char *pszLast = NULL;
    for (;;)
    {
        char ch = *pszFilename;
#if defined(__OS2__) || defined(__WIN__)
        if (ch == '/' || ch == '\\' || ch == ':')
        {
            while ((ch = *++pszFilename) == '/' || ch == '\\' || ch == ':')
                /* nothing */;
            pszLast = pszFilename;
        }
#else
        if (ch == '/')
        {
            while ((ch = *++pszFilename) == '/')
                /* betsuni */;
            pszLast = pszFilename;
        }
#endif
        if (!ch)
            return (char *)(pszLast ? pszLast : pszFilename);
        pszFilename++;
    }
}


/**
 * Gets the filename suffix.
 *
 * @returns Pointer to where the suffix starts within the string pointed to by pszFilename.
 * @returns Pointer to the terminator char if no suffix.
 * @param   pszFilename     The filename to parse.
 */
char   *kldrHlpGetSuff(const char *pszFilename)
{
    const char *pszDot = NULL;
    pszFilename = kldrHlpGetFilename(pszFilename);
    for (;;)
    {
        char ch = *pszFilename;
        if (ch == '.')
        {
            while ((ch = *++pszFilename) == '.')
                /* nothing */;
            if (ch)
                pszDot = pszFilename - 1;
        }
        if (!ch)
            return (char *)(pszDot ? pszDot : pszFilename);
        pszFilename++;
    }
}


/**
 * Gets the filename extention.
 *
 * @returns Pointer to where the extension starts within the string pointed to by pszFilename.
 * @returns Pointer to the terminator char if no extension.
 * @param   pszFilename     The filename to parse.
 */
char   *kldrHlpGetExt(const char *pszFilename)
{
    char *psz = kldrHlpGetSuff(pszFilename);
    return *psz ? psz + 1 : psz;
}


/**
 * Checks if this is only a filename or if it contains any kind
 * of drive, directory, or server specs.
 *
 * @returns 1 if this is a filename only.
 * @returns 0 of it's isn't only a filename.
 * @param   pszFilename     The filename to parse.
 */
int kldrHlpIsFilenameOnly(const char *pszFilename)
{
    for (;;)
    {
        const char ch = *pszFilename++;
#if defined(__OS2__) || defined(__WIN__)
        if (ch == '/' || ch == '\\' || ch == ':')
#else
        if (ch == '/')
#endif
            return 0;
        if (!ch)
            return 1;
    }
}