Function dfs_normalize_path

components/dfs/dfs_v1/src/dfs.c:750–883

* this function will normalize a path according to specified parent directory * and file name. * * @param directory the parent path * @param filename the file name * * @return the built full file path (absolute path) */

 * @return the built full file path (absolute path)
 */
char *dfs_normalize_path(const char *directory, const char *filename)
{
    char *fullpath;
    char *dst0, *dst, *src;

    /* check parameters */
    RT_ASSERT(filename != NULL);

#ifdef DFS_USING_WORKDIR
    if (directory == NULL) /* shall use working directory */
    {
#ifdef RT_USING_SMART
        directory = lwp_getcwd();
#else
        directory = &working_directory[0];
#endif
    }
#else
    if ((directory == NULL) && (filename[0] != '/'))
    {
        rt_kprintf(NO_WORKING_DIR);

        return NULL;
    }
#endif

    if (filename[0] != '/') /* it's a absolute path, use it directly */
    {
        fullpath = (char *)rt_malloc(strlen(directory) + strlen(filename) + 2);

        if (fullpath == NULL)
            return NULL;

        /* join path and file name */
        rt_snprintf(fullpath, strlen(directory) + strlen(filename) + 2,
                    "%s/%s", directory, filename);
    }
    else
    {
        fullpath = rt_strdup(filename); /* copy string */

        if (fullpath == NULL)
            return NULL;
    }

    src = fullpath;
    dst = fullpath;

    dst0 = dst;
    while (1)
    {
        char c = *src;

        if (c == '.')
        {
            if (!src[1]) src++; /* '.' and ends */
            else if (src[1] == '/')
            {