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/// TNFS Definitions ///

// Definitions for things returned by stat

// Bitmasks for the filemode field.
// These are defined by POSIX as a 16 bit octal value.
#define S_IFMT            0xF000
#define S_IFSOCK        0xC000
#define S_IFLNK            0xA000
#define S_IFREG            0x8000
#define S_IFBLK            0x6000
#define S_IFDIR            0x4000
#define S_IFCHR            0x2000
#define S_IFIFO            0x1000
#define S_ISUID            0x0800
#define S_ISGID            0x0400
#define S_ISVTX            0x0200
#define S_IRWXU            0x01C0
#define S_IRUSR            0x0100
#define S_IWUSR            0x0080
#define S_IXUSR            0x0040
#define S_IRGRP            0x0020
#define S_IWGRP            0x0010
#define S_IXGRP            0x0008
#define S_IROTH            0x0004
#define S_IWOTH            0x0002
#define S_IXOTH            0x0001

// Stat structure offsets
/*
File mode    - 2 bytes: file permissions - little endian byte order
uid            - 2 bytes: Numeric UID of owner
gid            - 2 bytes: Numeric GID of owner
size        - 4 bytes: Unsigned 32 bit little endian size of file in bytes
atime        - 4 bytes: Access time in seconds since the epoch, little end.
mtime        - 4 bytes: Modification time in seconds since the epoch,
little endian
ctime        - 4 bytes: Time of last status change, as above.
uidstring    - 0 or more bytes: Null terminated user id string
gidstring    - 0 or more bytes: Null terminated group id string
*/

#define STAT_MODE         0x00
#define STAT_UID        0x02
#define STAT_GID        0x04
#define STAT_SIZE        0x06
#define STAT_ATIME        0x0A
#define STAT_MTIME        0x0E
#define STAT_CTIME        0x12
#define STAT_STRINGS    0x16


// file open flags
/*
The flags are:

O_RDONLY    0x0001    Open read only
O_WRONLY    0x0002    Open write only
O_RDWR        0x0003    Open read/write

O_APPEND    0x0008    Append to the file, if it exists (write only)
O_CREAT        0x0100    Create the file if it doesn't exist (write only)
O_TRUNC        0x0200    Truncate the file on open for writing
O_EXCL        0x0400    With O_CREAT, returns an error if the file exists


*/

// flags
#define TNFS_O_RDONLY    0x0001
#define TNFS_O_WRONLY    0x0002
#define TNFS_O_RDWR        0x0003

#define TNFS_O_APPEND    0x0008
#define TNFS_O_CREAT    0x0100
#define TNFS_O_TRUNC    0x0200
#define TNFS_O_EXCL        0x0400

// mode: see above for "stat"

// lseek operators
/*
The seek types are defined as follows:
0x00        SEEK_SET - Go to an absolute position in the file
0x01        SEEK_CUR - Go to a relative offset from the current position
0x02        SEEK_END - Seek to EOF
*/

#define TNFS_SEEK_SET    0x00
#define TNFS_SEEK_CUR    0x01
#define TNFS_SEEK_END    0x02

/* file system handling */
extern int __LIB__ __CALLEE__ setmountpoint_tnfs(int mount_point);
extern int __LIB__ __CALLEE__ getmountpointstate_tnfs(int mount_point);
extern int __LIB__ __CALLEE__ mount_tnfs (int mount_point, char * hostname, char * mount_source, char * username, char * password);
extern int __LIB__ __CALLEE__ umount_tnfs(int mount_point);

/* BASIC load/save handling */
extern int __LIB__ __CALLEE__ load_file_tnfs(int mount_point, char * fname, unsigned int address);
extern int __LIB__ __CALLEE__ save_file_tnfs(int mount_point, char * fname, unsigned int address, unsigned int length);

/* directory handling */
extern int __LIB__ __CALLEE__ open_dir_tnfs(int mount_point, char * fname);
extern int __LIB__ __CALLEE__ read_dir_tnfs(int dir_handle, char * buffer);
extern int __LIB__ __CALLEE__ close_dir_tnfs(int dir_handle);
extern int __LIB__ __CALLEE__ change_dir_tnfs(int mount_point, char * fname);
extern int __LIB__ __CALLEE__ make_dir_tnfs(int mount_point, char * fname);
extern int __LIB__ __CALLEE__ remove_dir_tnfs(int mount_point, char * fname);
extern int __LIB__ __CALLEE__ get_current_dir_tnfs(int mount_point, char * buffer);

/* file manipulation */
extern int __LIB__ __CALLEE__ file_stat_tnfs(int mount_point, char * fname, char * buffer);
extern int __LIB__ __CALLEE__ file_rename_tnfs(int mount_point, char * old_name, char * new_name);
extern int __LIB__ __CALLEE__ file_delete_tnfs(int mount_point, char * fname);
extern int __LIB__ __CALLEE__ file_chmod_tnfs(int mount_point, char * fname, int mode);

/* file handling */
extern int __LIB__ __CALLEE__ open_file_tnfs(int mount_point, char * fname, unsigned int flags, unsigned int mode);
extern int __LIB__ __CALLEE__ close_file_tnfs(int fd);
extern int __LIB__ __CALLEE__ read_file_tnfs(int fd, char * buffer, unsigned int size);
extern int __LIB__ __CALLEE__ write_file_tnfs(int fd, char * buffer, unsigned int size);
extern int __LIB__ __CALLEE__ lseek_file_tnfs(long position, int fd, unsigned int op);