552 lines
13 KiB
C
552 lines
13 KiB
C
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/*
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* File : rtthread.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006-2012, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rt-thread.org/license/LICENSE.
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*
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* Change Logs:
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* Date Author Notes
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* 2012-11-27 prife the first version
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*/
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#include <rtthread.h>
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#include <dfs_fs.h>
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#include <dfs_def.h>
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#include <rtdevice.h>
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//#include "dfs_win32.h"
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#include <io.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdio.h>
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#include <string.h>
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#include <WinError.h>
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#include <windows.h>
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/*
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* RT-Thread DFS Interface for win-directory as an disk device
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*/
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#define FILE_PATH_MAX 256 /* the longest file path */
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#define WIN32_DIRDISK_ROOT "." /* "F:\\Project\\svn\\rtt\\trunk\\bsp\\simulator_test" */
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/* There are so many error codes in windows, you'd better google for details.
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* google "System Error Codes (Windows)"
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* http://msdn.microsoft.com/ZH-CN/library/windows/desktop/ms681381(v=vs.85).aspx
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*/
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struct _errcode_map
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{
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rt_uint16_t dfserr;
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rt_uint16_t win32err;
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};
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static const struct _errcode_map errcode_table[] =
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{
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{DFS_STATUS_ENOENT, ERROR_FILE_NOT_FOUND },
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{DFS_STATUS_ENOENT, ERROR_PATH_NOT_FOUND },
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{DFS_STATUS_EEXIST, ERROR_FILE_EXISTS },
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{DFS_STATUS_EEXIST, ERROR_ALREADY_EXISTS },
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{DFS_STATUS_ENOTEMPTY, ERROR_DIR_NOT_EMPTY },
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{DFS_STATUS_EBUSY, ERROR_PATH_BUSY },
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{DFS_STATUS_EINVAL, ERROR_ACCESS_DENIED },
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#if 0 /* TODO: MORE NEED BE ADDED */
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{DFS_STATUS_EISDIR, ERROR_FILE_EXISTS },
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{DFS_STATUS_ENOTDIR, ERROR_FILE_EXISTS },
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{DFS_STATUS_EBADF, ERROR_FILE_EXISTS },
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{DFS_STATUS_EBUSY, ERROR_FILE_EXISTS },
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{DFS_STATUS_ENOMEM, ERROR_FILE_EXISTS },
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{DFS_STATUS_ENOSPC, ERROR_FILE_EXISTS },
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#endif
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};
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static int win32_result_to_dfs(DWORD res)
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{
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int i;
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int err = 0;
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for (i = 0; i < sizeof(errcode_table) / sizeof(struct _errcode_map); i++)
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{
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if (errcode_table[i].win32err == (res & 0xFFFF))
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{
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err = -errcode_table[i].dfserr;
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return err;
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}
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}
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/* unknown error */
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rt_kprintf("dfs win32 error not supported yet: %d\n", res);
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return -1;
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}
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static int dfs_win32_mount(
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struct dfs_filesystem *fs,
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unsigned long rwflag,
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const void *data)
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{
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return 0;
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}
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static int dfs_win32_unmount(struct dfs_filesystem *fs)
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{
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return 0;
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}
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static int dfs_win32_mkfs(const char *device_name)
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{
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return -DFS_STATUS_ENOSYS;
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}
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static int dfs_win32_statfs(struct dfs_filesystem *fs,
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struct statfs *buf)
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{
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return -DFS_STATUS_ENOSYS;
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}
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static char *winpath_dirdup(char *des, const char *src)
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{
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char *path;
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int i = 0;
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path = rt_malloc(FILE_PATH_MAX);
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if (path == RT_NULL)
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return RT_NULL;
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strcpy(path, des);
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strcat(path, src);
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while (1)
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{
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if (path[i] == 0)
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break;
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if (path[i] == '/')
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path[i] = '\\';
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i++;
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}
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return path;
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}
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static int dfs_win32_open(struct dfs_fd *file)
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{
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int fd;
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int oflag, mode;
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char *file_path;
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int res;
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oflag = file->flags;
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if (oflag & DFS_O_DIRECTORY) /* operations about dir */
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{
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struct _finddata_t dir;
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int handle;
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int len;
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file_path = winpath_dirdup(WIN32_DIRDISK_ROOT, file->path);
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if (oflag & DFS_O_CREAT) /* create a dir*/
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{
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res = CreateDirectory(file_path, NULL);
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if (res == 0)
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{
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rt_free(file_path);
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return win32_result_to_dfs(GetLastError());
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}
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}
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len = strlen(file_path);
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if (file_path[len - 1] != '\\')
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{
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file_path[len] = '\\';
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file_path[len + 1] = 0;
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}
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strcat(file_path, "*.*");
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/* _findfirst will get '.' */
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if ((handle = _findfirst(file_path, &dir)) == -1)
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{
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rt_free(file_path);
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goto __err;
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}
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/* save this pointer,will used by dfs_win32_getdents*/
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file->data = (void *)handle;
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rt_free(file_path);
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return DFS_STATUS_OK;
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}
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/* regular file operations */
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mode = O_BINARY;
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if (oflag & DFS_O_RDONLY) mode |= O_RDONLY;
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if (oflag & DFS_O_WRONLY) mode |= O_WRONLY;
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if (oflag & DFS_O_RDWR) mode |= O_RDWR;
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/* Opens the file, if it is existing. If not, a new file is created. */
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if (oflag & DFS_O_CREAT) mode |= O_CREAT;
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/* Creates a new file. If the file is existing, it is truncated and overwritten. */
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if (oflag & DFS_O_TRUNC) mode |= O_TRUNC;
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/* Creates a new file. The function fails if the file is already existing. */
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if (oflag & DFS_O_EXCL) mode |= O_EXCL;
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file_path = winpath_dirdup(WIN32_DIRDISK_ROOT, file->path);
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fd = _open(file_path, mode, 0x0100 | 0x0080); /* _S_IREAD | _S_IWRITE */
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rt_free(file_path);
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if (fd < 0)
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goto __err;
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/* save this pointer, it will be used when calling read(), write(),
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* flush(), seek(), and will be free when calling close()*/
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file->data = (void *)fd;
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file->pos = 0;
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file->size = _lseek(fd, 0, SEEK_END);
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if (oflag & DFS_O_APPEND)
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{
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file->pos = file->size;
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}
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else
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_lseek(fd, 0, SEEK_SET);
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return 0;
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__err:
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res = GetLastError();
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return win32_result_to_dfs(res);
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}
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static int dfs_win32_close(struct dfs_fd *file)
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{
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int oflag;
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oflag = file->flags;
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if (oflag & DFS_O_DIRECTORY)
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{
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/* operations about dir */
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if (_findclose((intptr_t)file->data) < 0)
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goto __err;
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return 0;
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}
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/* regular file operations */
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if (_close((int)(file->data)) < 0)
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goto __err;
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return 0;
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__err:
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return win32_result_to_dfs(GetLastError());
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}
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static int dfs_win32_ioctl(struct dfs_fd *file, int cmd, void *args)
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{
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return -DFS_STATUS_ENOSYS;
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}
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static int dfs_win32_read(struct dfs_fd *file, void *buf, rt_size_t len)
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{
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int fd;
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int char_read;
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fd = (int)(file->data);
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char_read = _read(fd, buf, len);
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if (char_read < 0)
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return win32_result_to_dfs(GetLastError());
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/* update position */
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file->pos = _lseek(fd, 0, SEEK_CUR);
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return char_read;
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}
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static int dfs_win32_write(struct dfs_fd *file,
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const void *buf,
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rt_size_t len)
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{
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int fd;
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int char_write;
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fd = (int)(file->data);
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char_write = _write(fd, buf, len);
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if (char_write < 0)
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return win32_result_to_dfs(GetLastError());
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/* update position */
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file->pos = _lseek(fd, 0, SEEK_CUR);
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return char_write;
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}
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static int dfs_win32_flush(struct dfs_fd *file)
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{
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return 0;
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}
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static int dfs_win32_seek(struct dfs_fd *file,
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rt_off_t offset)
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{
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int result;
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/* set offset as current offset */
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if (file->type == FT_DIRECTORY)
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{
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return -DFS_STATUS_ENOSYS;
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}
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else if (file->type == FT_REGULAR)
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{
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result = _lseek((int)(file->data), offset, SEEK_SET);
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if (result >= 0)
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return offset;
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}
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return win32_result_to_dfs(GetLastError());
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}
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/* return the size of struct dirent*/
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static int dfs_win32_getdents(
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struct dfs_fd *file,
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struct dirent *dirp,
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rt_uint32_t count)
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{
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rt_uint32_t index;
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struct dirent *d;
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struct _finddata_t fileinfo;
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int handle;
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int result;
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handle = (int)(file->data);
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RT_ASSERT(handle != RT_NULL);
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/* round count, count is always 1 */
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count = (count / sizeof(struct dirent)) * sizeof(struct dirent);
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if (count == 0) return -DFS_STATUS_EINVAL;
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index = 0;
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/* usually, the while loop should only be looped only once! */
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while (1)
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{
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d = dirp + index;
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if (_findnext(handle, &fileinfo) != 0) //-1 failed
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goto __err;
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if (fileinfo.attrib & _A_SUBDIR)
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d->d_type = DFS_DT_DIR; /* directory */
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else
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d->d_type = DFS_DT_REG;
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/* write the rest arguments of struct dirent* dirp */
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d->d_namlen = strlen(fileinfo.name);
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d->d_reclen = (rt_uint16_t)sizeof(struct dirent);
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strcpy(d->d_name, fileinfo.name);
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index ++;
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if (index * sizeof(struct dirent) >= count)
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break;
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}
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if (index == 0)
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return 0;
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file->pos += index * sizeof(struct dirent);
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return index * sizeof(struct dirent);
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__err:
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if ((result = GetLastError()) == ERROR_NO_MORE_FILES)
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return 0;
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else
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return win32_result_to_dfs(result);
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}
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static int dfs_win32_unlink(struct dfs_filesystem *fs, const char *path)
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{
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int result;
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char *fp;
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fp = winpath_dirdup(WIN32_DIRDISK_ROOT, path);
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if (fp == RT_NULL)
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{
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rt_kprintf("out of memory.\n");
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return -DFS_STATUS_ENOMEM;
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}
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result = GetFileAttributes(fp);
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if (result == INVALID_FILE_ATTRIBUTES)
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goto __err;
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if (result & FILE_ATTRIBUTE_DIRECTORY)//winnt.h
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{
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if (RemoveDirectory(fp) == RT_FALSE)
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goto __err;
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}
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else //(result & FILE_ATTRIBUTE_NORMAL)
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{
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if (_unlink(fp) < 0)
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goto __err;
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}
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rt_free(fp);
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return 0;
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__err:
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rt_free(fp);
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return win32_result_to_dfs(GetLastError());
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}
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static int dfs_win32_rename(
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struct dfs_filesystem *fs,
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const char *oldpath,
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const char *newpath)
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{
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int result;
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char *op, *np;
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op = winpath_dirdup(WIN32_DIRDISK_ROOT, oldpath);
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np = winpath_dirdup(WIN32_DIRDISK_ROOT, newpath);
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if (op == RT_NULL || np == RT_NULL)
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{
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rt_kprintf("out of memory.\n");
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return -DFS_STATUS_ENOMEM;
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}
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/* If the function fails, the return value is zero. */
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result = MoveFile(op, np);
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rt_free(op);
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rt_free(np);
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if (result == 0)
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return win32_result_to_dfs(GetLastError());
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return 0;
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}
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static int dfs_win32_stat(struct dfs_filesystem *fs, const char *path, struct stat *st)
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{
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WIN32_FIND_DATA fileInfo;
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HANDLE hFind;
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char *fp;
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fp = winpath_dirdup(WIN32_DIRDISK_ROOT, path);
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if (fp == RT_NULL)
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{
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rt_kprintf("out of memory.\n");
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return -DFS_STATUS_ENOMEM;
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}
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hFind = FindFirstFile(fp, &fileInfo);
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rt_free(fp);
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if (hFind == INVALID_HANDLE_VALUE)
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goto __err;
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st->st_mode = DFS_S_IFREG | DFS_S_IRUSR | DFS_S_IRGRP | DFS_S_IROTH |
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DFS_S_IWUSR | DFS_S_IWGRP | DFS_S_IWOTH;
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/* convert file info to dfs stat structure */
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if (fileInfo.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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{
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st->st_mode &= ~DFS_S_IFREG;
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st->st_mode |= DFS_S_IFDIR | DFS_S_IXUSR | DFS_S_IXGRP | DFS_S_IXOTH;
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}
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st->st_dev = 0;
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st->st_size = fileInfo.nFileSizeLow;
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st->st_mtime = 0;
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st->st_blksize = 0;
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FindClose(hFind);
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return 0;
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__err:
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return win32_result_to_dfs(GetLastError());
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}
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static const struct dfs_filesystem_operation dfs_win32_ops =
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{
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"wdir", /* file system type: dir */
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DFS_FS_FLAG_DEFAULT,
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dfs_win32_mount,
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dfs_win32_unmount,
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dfs_win32_mkfs,
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dfs_win32_statfs,
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dfs_win32_open,
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dfs_win32_close,
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dfs_win32_ioctl,
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dfs_win32_read,
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dfs_win32_write,
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dfs_win32_flush,
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dfs_win32_seek,
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dfs_win32_getdents,
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dfs_win32_unlink,
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dfs_win32_stat,
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dfs_win32_rename,
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};
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int dfs_win32_init(void)
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{
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/* register uffs file system */
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dfs_register(&dfs_win32_ops);
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return 0;
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}
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static rt_err_t nop_init(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_err_t nop_open(rt_device_t dev, rt_uint16_t oflag)
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{
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return RT_EOK;
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}
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static rt_err_t nop_close(rt_device_t dev)
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{
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return RT_EOK;
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}
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static rt_size_t nop_read(rt_device_t dev,
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rt_off_t pos,
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void *buffer,
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rt_size_t size)
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{
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return size;
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}
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static rt_size_t nop_write(rt_device_t dev,
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rt_off_t pos,
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const void *buffer,
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rt_size_t size)
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{
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return size;
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}
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static rt_err_t nop_control(rt_device_t dev, rt_uint8_t cmd, void *args)
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{
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return RT_EOK;
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}
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static struct rt_device win_sharedir_dev;
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rt_err_t rt_win_sharedir_init(const char *name)
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{
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rt_device_t dev;
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dev = &win_sharedir_dev;
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RT_ASSERT(dev != RT_NULL);
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/* set device class and generic device interface */
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dev->type = RT_Device_Class_Block;
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dev->init = nop_init;
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dev->open = nop_open;
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dev->read = nop_read;
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dev->write = nop_write;
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dev->close = nop_close;
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dev->control = nop_control;
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dev->rx_indicate = RT_NULL;
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dev->tx_complete = RT_NULL;
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/* register to RT-Thread device system */
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return rt_device_register(dev, name, RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_STANDALONE);
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}
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