direntwin.cpp

Go to the documentation of this file.

/***************************** License **********************************

 Copyright (C) 2008 by Communicative Machines
 http://www.cmlabs.com   All rights reserved.

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 This library 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
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

************************************************************************/
/*

    Implementation of POSIX directory browsing functions and types for Win32.

    Kevlin Henney (mailto:kevlin@acm.org), March 1997.

    Copyright Kevlin Henney, 1997. All rights reserved.

    Permission to use, copy, modify, and distribute this software and its
    documentation for any purpose is hereby granted without fee, provided
    that this copyright and permissions notice appear in all copies and
    derivatives, and that no charge may be made for the software and its
    documentation except to cover cost of distribution.
    
    This software is supplied "as is" without express or implied warranty.

    But that said, if there are any problems please get in touch.

*/

#include "direntwin.h"
/*
#if !defined(_WIN32_WCE)
        #include <errno.h>
        #include <io.h>
#else
        #define _finddata_t LPWIN32_FIND_DATA
#endif
*/

namespace cmlabs {


#if defined(_WIN32_WCE)
//      #define CONSTCHAR unsigned short
        #define CONSTCHAR WCHAR
#else
        #define CONSTCHAR char
#endif

#if defined(_WIN32_WCE)
        int errno;
#endif

#ifdef CYGWIN
        int errno;
#endif

struct DIR
{
        HANDLE                          handle; /* -1 for failed rewind */
        WIN32_FIND_DATA         info;
        struct dirent           result; /* d_name null iff first time */
        CONSTCHAR *name;
};

DIR *opendir(const char *name)
{
    DIR *dir = 0;

    if(name && name[0])
    {
        size_t base_length = strlen(name);
        const char *all = /* the root directory is a special case... */
            strchr("/\\", name[base_length - 1]) ? "*" : "/*";

        if((dir = (DIR *) malloc(sizeof *dir)) != 0 &&
           (dir->name = (CONSTCHAR*) malloc(base_length + strlen(all) + 1)) != 0)
        {
            strcat(strcpy((char*)dir->name, name), all);

            if((dir->handle = FindFirstFile(dir->name, &dir->info)) != INVALID_HANDLE_VALUE)
            {
                dir->result.d_name = 0;
            }
            else /* rollback */
            {
                free((void*)dir->name);
                free(dir);
                dir = 0;
            }
        }
        else /* rollback */
        {
            free(dir);
            dir   = 0;
            errno = 12; // ENOMEM;
        }
    }
    else
    {
        errno = 22; // EINVAL;
    }

    return dir;
}

int closedir(DIR *dir)
{
    int result = -1;

    if(dir)
    {
        if(dir->handle != INVALID_HANDLE_VALUE)
        {
            result = FindClose(dir->handle);
        }

        free((void*)dir->name);
        free(dir);
    }

    if(result == -1) /* map all errors to EBADF */
    {
        errno = 9; // EBADF;
    }

    return result;
}

struct dirent *readdir(DIR *dir)
{
    struct dirent *result = 0;

    if(dir && dir->handle != INVALID_HANDLE_VALUE)
    {
        if((!dir->result.d_name) || (FindNextFile(dir->handle, &dir->info)))
        {
            result         = &dir->result;
            result->d_name = (char*) dir->info.cFileName;
        }
    }
    else
    {
        errno = 9; // EBADF;
    }

    return result;
}

void rewinddir(DIR *dir)
{
    if(dir && dir->handle != INVALID_HANDLE_VALUE)
    {
        FindClose(dir->handle);
        dir->handle = FindFirstFile(dir->name, &dir->info);
        dir->result.d_name = 0;
    }
    else
    {
        errno = 9; // EBADF;
    }
}


} // namespace cmlabs

---