原创 yaffs2 direct在VC2008下移植

源码下载：http://www.aleph1.co.uk/cgi-bin/viewcvs.cgi/yaffs2/

1． 在VS2008建立工程文件，加入yaffs2核心代码

Core:

 yaffs_checkptrw.c

yaffs_ecc.c

yaffs_guts.c

yaffs_nand.c

yaffs_packedtags1.c

yaffs_packedtags2.c

yaffs_qsort.c

yaffs_tagscompat.c

yaffs_tagsvalidity.c

Direct:

    yaffs_fileem2k.c

yaffs_norif1.c

yaffs_ramdisk.c

yaffscfg2k.c

yaffsfs.c

ynorsim.c

其中dtest.c为main函数入口文件。

2.在工程文件Preprocessor Definitions 预编译定义中定义好

CONFIG_YAFFS_DIRECT

CONFIG_YAFFS_SHORT_NAMES_IN_RAM

CONFIG_YAFFS_YAFFS2

CONFIG_YAFFS_PROVIDE_DEFS

CONFIG_YAFFSFS_PROVIDE_VALUES

NO_Y_INLINE

3. 然后第一次编译，无法编译通过

在文件devextras.h中添加如下定义：

#ifndef _DEV_T_DEFINED

typedef unsigned int _dev_t;            /* device code */

#if     !__STDC__

/* Non-ANSI name for compatibility */

typedef unsigned int dev_t;

#endif

#define _DEV_T_DEFINED

#endif

#define u_char unsigned char

#define loff_t int

typedef long off_t;

typedef unsigned long mode_t;

#define __inline__

#define __S_IFMT 0170000 /* These bits determine file type.  */

/* File types.  */

#define __S_IFDIR 0040000 /* Directory.  */

#define __S_IFCHR 0020000 /* Character device.  */

#define __S_IFBLK 0060000 /* Block device.  */

#define __S_IFREG 0100000 /* Regular file.  */

#define __S_IFIFO 0010000 /* FIFO.  */

#define __S_IFLNK 0120000 /* Symbolic link.  */

#define __S_IFSOCK 0140000 /* Socket.  */

/* Protection bits.  */

#define __S_ISUID 04000 /* Set user ID on execution.  */

#define __S_ISGID 02000 /* Set group ID on execution.  */

#define __S_ISVTX 01000 /* Save swapped text after use (sticky).  */

#define __S_IREAD 0400 /* Read by owner.  */

#define __S_IWRITE 0200 /* Write by owner.  */

#define __S_IEXEC 0100 /* Execute by owner.  */

#define __S_ISTYPE(mode, mask) (((mode) & __S_IFMT) == (mask))

#define S_ISDIR(mode)  __S_ISTYPE((mode), __S_IFDIR)

#define S_ISCHR(mode)  __S_ISTYPE((mode), __S_IFCHR)

#define S_ISBLK(mode)  __S_ISTYPE((mode), __S_IFBLK)

#define S_ISREG(mode)  __S_ISTYPE((mode), __S_IFREG)

#define S_ISSOCK(mode) __S_ISTYPE((mode), __S_IFSOCK)

#define S_ISFIFO(mode) __S_ISTYPE((mode), __S_IFSOCK)

#define S_IRUSR __S_IREAD // Read by owner.  

#define S_IWUSR __S_IWRITE // Write by owner. 

#define S_IXUSR __S_IEXEC // Execute by owner. 

# define S_IREAD S_IRUSR

# define S_IWRITE S_IWUSR

# define S_IEXEC S_IXUSR

# define S_IFDIR __S_IFDIR

于此同时在VC2008 目录中的

D:\Program Files\Microsoft Visual Studio 9.0\VC\include\sys\stat.h文件

将下列代码注释掉

/*

#define _S_IFMT         0xF000          // file type mask 

#define _S_IFDIR        0x4000          // directory 

#define _S_IFCHR        0x2000          // character special 

#define _S_IFIFO        0x1000          // pipe 

#define _S_IFREG        0x8000          // regular 

#define _S_IREAD        0x0100          // read permission, owner 

#define _S_IWRITE       0x0080          // write permission, owner 

#define _S_IEXEC        0x0040          //execute/search permission, owner 

 */

/* Non-ANSI names for compatibility */

/*

#define S_IFMT   _S_IFMT

#define S_IFDIR  _S_IFDIR

#define S_IFCHR  _S_IFCHR

#define S_IFREG  _S_IFREG

#define S_IREAD  _S_IREAD

#define S_IWRITE _S_IWRITE

#define S_IEXEC  _S_IEXEC

*/

3.第二次编译有如下错误需要解决

1>.\yaffs2\direct\yaffs_fileem2k.c(113) : error C2143: syntax error : missing ';' before 'type'

该错误为：

static int GetBlockFileHandle(int n)

{

    int h;

    int requiredSize;

    char name[40];

    NToName(name,n);

    int fSize;

    int i;

将其改为：

static int GetBlockFileHandle(int n)

{

    int h;

    int requiredSize;

    char name[40];

    int fSize;

    int i;

NToName(name,n);

备注：VC2008 C代码编译过程中，变量的使用需在大括号之后声明好

继续编译工程文件同样出现类似的问题依次改之。

1>yaffs_fileem2k.c

1>.\yaffs2\direct\yaffs_fileem2k.c(265) : error C2275: '__u8' : illegal use of this type as an expression

该错误为：

            else

            {

                yaffs_PackedTags2 pt;

                yaffs_PackTags2(&pt,tags, !dev->param.noTagsECC);

                __u8 * ptab = (__u8 *)&pt;

将其改为：

            else

            {

                yaffs_PackedTags2 pt;

                __u8 * ptab;

                yaffs_PackTags2(&pt,tags, !dev->param.noTagsECC);

                ptab = (__u8 *)&pt;

1>yaffs_fileem2k.c

1>.\yaffs2\direct\yaffs_fileem2k.c(417) : error C2275: 'yaffs_PackedTags2TagsPart' : illegal use of this type as an expression

该错误为：

    if(dev->param.inbandTags){

        /* Got to suck the tags out of the data area */

        if(!data) {

            localData=1;

            data = yaffs_GetTempBuffer(dev,__LINE__);

        }

        yaffs_PackedTags2TagsPart * pt2tp;

        pt2tp=(yaffs_PackedTags2TagsPart*)&data[dev->nDataBytesPerChunk];

将其改为：

    if(dev->param.inbandTags){

        yaffs_PackedTags2TagsPart * pt2tp;

        /* Got to suck the tags out of the data area */

        if(!data) {

            localData=1;

            data = yaffs_GetTempBuffer(dev,__LINE__);

        }

        pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk];

4.错误改好后dtest.c文件内容如下：

/*

 * YAFFS: Yet another FFS. A NAND-flash specific file system.

 *

 * Copyright (C) 2002 Aleph One Ltd.

 *   for Toby Churchill Ltd and Brightstar Engineering

 *

 * Created by Charles Manning <charles@aleph1.co.uk>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 */

#include <stdio.h>

#include <string.h>

#include <unistd.h>

#include <fcntl.h>

#include "yaffsfs.h"

int random_seed;

int simulate_power_failure;

int main(int argc, char *argv[])

{

    int fd;

    char readbuf[10];

    int writebyte;

    int readbyte;

    int i;

    yaffs_StartUp();                                              //初始化 

    for (i=0 ;i<10 ;i++)

    {

       readbuf=0;