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rt-thread-official/bsp/simulator/applications/dfs_win32.c

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