file.h File Reference

#include <stdint-gcc.h>

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Data Structures
struct	file_stat

Enumerations
enum	FILE_SEEK_MODES { SEEK_SET , SEEK_CUR , SEEK_END }
enum	FILE_OPEN_MODES { FILE_MODE_READ , FILE_MODE_WRITE , FILE_MODE_APPEND , FILE_MODE_INVALID }
enum	FILE_STAT_FLAGS_ENUM { FILE_STAT_READ_ONLY = 0b00000001 , FILE_STAT_FOLDER = 0b00000010 }

Functions
int	fopen (const char *filename, const char *mode)
	Opens file.
int	fread (void *ptr, uint32_t size, uint32_t nmemb, int fd)
	Reads from file.
int	fwrite (void *ptr, uint32_t size, uint32_t nmemb, int fd)
	Writes to file.
int	fstat (int fd, struct file_stat *stat)
	Returns file status.
int	fseek (int fd, int offset, FILE_SEEK_MODE whence)
	Seeks into file.
int	fclose (int fd)
	Closes file descriptor.

Enumeration Type Documentation

FILE_OPEN_MODES

enum FILE_OPEN_MODES

Enumerator
FILE_MODE_READ
FILE_MODE_WRITE
FILE_MODE_APPEND
FILE_MODE_INVALID

FILE_SEEK_MODES

enum FILE_SEEK_MODES

Enumerator
SEEK_SET	Absolute position from 0.
SEEK_CUR	Relative position.
SEEK_END	Absolute position from the end of file.

FILE_STAT_FLAGS_ENUM

enum FILE_STAT_FLAGS_ENUM

Enumerator
FILE_STAT_READ_ONLY
FILE_STAT_FOLDER

Function Documentation

fclose()

int fclose

(

int

fd

)

Closes file descriptor.

Parameters

fd	File descriptor

Returns

int Status

References filesystem::close, EIO, file_descriptor::filesystem, and file_descriptor::private_fs_descriptor.

fopen()

int fopen	(	const char *	filename,
		const char *	str_mode )

Opens file.

Parameters

filename	File to open
str_mode	Open mode

Returns

int Status

References assert, data, EINVARG, FILE_MODE_INVALID, filename, file_descriptor::filesystem, file_descriptor::index, kfree(), kzalloc(), MAX_MOUNTED, MAX_PATH, memset(), mounted, path_part::next, path_part::part, pathparser_free(), pathparser_parse(), file_descriptor::private_fs, file_descriptor::private_fs_descriptor, strcmp(), strcpy(), and strlen().

fread()

int fread	(	void *	ptr,
		uint32_t	size,
		uint32_t	nmemb,
		int	fd )

Reads from file.

Parameters

ptr	Output buffer
size	Size in bytes of block
nmemb	Number of blocks to read
fd	File descriptor

Returns

int Status

References EINVARG, file_descriptor::filesystem, file_descriptor::private_fs, file_descriptor::private_fs_descriptor, filesystem::read, and size.

fseek()

int fseek	(	int	fd,
		int	offset,
		FILE_SEEK_MODE	whence )

Seeks into file.

Parameters

fd	File descriptor
offset	Seek offset
whence	File seek mode (SEEK_SET for absolute, SEEK_CUR for relative)

Returns

int Status

References EIO, file_descriptor::filesystem, offset, file_descriptor::private_fs_descriptor, and filesystem::seek.

fstat()

int fstat	(	int	fd,
		struct file_stat *	stat )

Returns file status.

Parameters

fd	File descriptor
stat	Output file status struct

Returns

int Status

References EIO, file_descriptor::filesystem, file_descriptor::private_fs_descriptor, and filesystem::stat.

fwrite()

int fwrite	(	void *	ptr,
		uint32_t	size,
		uint32_t	nmemb,
		int	fd )

Writes to file.

Parameters

ptr	Input buffer
size	Size in bytes of block
nmemb	Number of blocks to read
fd	File descriptor

Returns

int Status

References EINVARG, file_descriptor::filesystem, file_descriptor::private_fs, file_descriptor::private_fs_descriptor, size, and filesystem::write.