fs.h

[詳解]

/** @file
    @brief      ファイルシステムAPI

    @date       2018.09.09
    @author     Takashi SHUDO
*/

#ifndef FS_H
#define FS_H

#include "str.h"
#include "datetime.h"
#include "device.h"

#define FSNAME_VFAT     "vfat"
#define FSNAME_PIPE     "pipe"

#ifdef GSC_COMP_ENABLE_FATFS
#include "ff.h"
#if FF_USE_LFN
#define MAX_FNAME_LEN   FF_MAX_LFN
#else
#define MAX_FNAME_LEN   12
#endif
#else
#define MAX_FNAME_LEN   63
#endif

#if 1
typedef unsigned long long      t_size;
typedef long long               t_ssize;
#else
typedef unsigned int    t_size;
typedef int             t_ssize;
#endif

typedef struct {
        t_size  fsize;
        t_time  fdatetime;
        unsigned int fattrib;
        uchar   fname[MAX_FNAME_LEN + 1];
} FS_FILEINFO;  ///< ファイル情報

typedef struct {
        struct st_filesystem *fs;
        union {
#ifdef GSC_COMP_ENABLE_FATFS
                DIR dir;
#endif
#ifdef GSC_COMP_ENABLE_PIPEFS
                int finfo_cnt;
#endif
        } dir;
} FS_DIR;       ///< ディレクトリ情報

struct st_filesystem {
        char *name;
        int (* mount)(int drvno, struct st_device *dev);
        int (* unmount)(int drvno, struct st_device *dev);

        void * (* open)(const uchar *path, int flags);
        t_ssize (* read)(void *fd, void *buf, t_size count);
        t_ssize (* write)(void *fd, const void *buf, t_size count);
        t_ssize (* seek)(void *fd, t_ssize offset, int whence);
        t_size (* tell)(void *fd);
        int (* close)(void *fd);
        FS_DIR * (* opendir)(const uchar *name);
        int (* readdir)(FS_DIR *dir, FS_FILEINFO *finfo);
        int (* closedir)(FS_DIR *dir);
        int (* stat)(const uchar *path, FS_FILEINFO *finfo);
        int (* getfree)(const uchar *path, unsigned long *sect, void **fso);
        int (* sync)(void *fd);
        int (* unlink)(const uchar *path);
        int (* mkdir)(const uchar *path);
        int (* chmod)(const uchar *path, unsigned char flag);
        int (* rename)(const uchar *oldpath, const uchar *newpath);
        int (* mkfs)(const uchar *path, unsigned char part, unsigned short alloc);
}; ///< ファイルシステム構造体

extern struct st_filesystem * search_filesystem(const char *name);

#endif // FS_H