emutools_files.c File Reference

#include "xemu/emutools.h"
#include "xemu/emutools_files.h"
#include <string.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>

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Functions
void	xemuexec_open_native_file_browser (char *dir)
int	xemu_open_file (const char *filename, int mode, int *mode2, char *filepath_back)
ssize_t	xemu_safe_read (int fd, void *buffer, size_t length)
ssize_t	xemu_safe_write (int fd, const void *buffer, size_t length)
off_t	xemu_safe_file_size_by_fd (int fd)
off_t	xemu_safe_file_size_by_name (const char *name)
int	xemu_safe_close (int fd)
int	xemu_safe_open (const char *fn, int flags)
int	xemu_safe_open_with_mode (const char *fn, int flags, int mode)
int	xemu_save_file (const char *filename_in, void *data, int size, const char *cry)
int	xemu_load_file (const char *filename, void *store_to, int min_size, int max_size, const char *cry)
int	xemu_create_large_empty_file (const char *os_path, Uint64 size, int is_sparse)

Variables
void *	xemu_load_buffer_p
char	xemu_load_filepath [PATH_MAX]

Function Documentation

xemu_create_large_empty_file()

int xemu_create_large_empty_file	(	const char *	os_path,
		Uint64	size,
		int	is_sparse
	)

Definition at line 727 of file emutools_files.c.

xemu_load_file()

int xemu_load_file	(	const char *	filename,
		void *	store_to,
		int	min_size,
		int	max_size,
		const char *	cry
	)

Definition at line 674 of file emutools_files.c.

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xemu_open_file()

int xemu_open_file	(	const char *	filename,
		int	mode,
		int *	mode2,
		char *	filepath_back
	)

Open a file (probably with special search paths, see below), returning a file descriptor, or negative value in case of failure.

Central part of file handling in Xemu.

Parameters

*filename	name of the file if it begins with '@' the file is meant to relative to the SDL preferences directory (ie: @thisisit.rom, no need for dirsep!) if it begins with '#' the file is meant for 'data directory' which is probed then multiple places, depends on the OS as well Note: in this case, if installer is enabled and file not found, Xemu can try to download the file. For this, see above the "installer" part of this source otherwise it's simply a file name, passed as-is
mode	actually the flags parameter for open (O_RDONLY, etc) O_BINARY is used automatically in case of Windows, no need to specify as input data you can even use creating file effect with the right value here
*mode2	pointer to an int, secondary open mode set if it's NULL pointer, it won't be used ever if it's not NULL, open() is also tried with the pointed flags for open() after trying (and failed!) open() with the 'mode' par if mode2 pointer is not NULL, the pointed value will be set to XEMU_OPEN_FILE_FIRST_MODE_USED by this func, if NOT *mode2 is used with successfull open the reason for this madness: opening a disk image which neads to be read/write access, but also works for read-only, however then the caller needs to know if the disk emulation is about r/w or ro only ...
*filepath_back	if not null, actually tried path will be placed here (even in case of non-successfull call, ie retval is negative) in case of multiple-path tries (# prefix) the first (so the most relevant, hopefully) is passed back note: if no prefix (@ and #) the filename will be returned as is, even if didn't hold absolute path (only relative) or no path as all (both: relative to cwd)!

Definition at line 469 of file emutools_files.c.

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xemu_safe_close()

int xemu_safe_close

(

int

fd

)

Definition at line 600 of file emutools_files.c.

xemu_safe_file_size_by_fd()

off_t xemu_safe_file_size_by_fd

(

int

fd

)

Definition at line 583 of file emutools_files.c.

xemu_safe_file_size_by_name()

off_t xemu_safe_file_size_by_name

(

const char *

name

)

Definition at line 592 of file emutools_files.c.

xemu_safe_open()

int xemu_safe_open	(	const char *	fn,
		int	flags
	)

Definition at line 610 of file emutools_files.c.

xemu_safe_open_with_mode()

int xemu_safe_open_with_mode	(	const char *	fn,
		int	flags,
		int	mode
	)

Definition at line 616 of file emutools_files.c.

xemu_safe_read()

ssize_t xemu_safe_read	(	int	fd,
		void *	buffer,
		size_t	length
	)

Definition at line 543 of file emutools_files.c.

xemu_safe_write()

ssize_t xemu_safe_write	(	int	fd,
		const void *	buffer,
		size_t	length
	)

Definition at line 563 of file emutools_files.c.

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xemu_save_file()

int xemu_save_file	(	const char *	filename_in,
		void *	data,
		int	size,
		const char *	cry
	)

Definition at line 622 of file emutools_files.c.

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xemuexec_open_native_file_browser()

void xemuexec_open_native_file_browser

(

char *

dir

)

Definition at line 431 of file emutools_files.c.

Variable Documentation

xemu_load_buffer_p

void* xemu_load_buffer_p

Definition at line 34 of file emutools_files.c.

xemu_load_filepath

char xemu_load_filepath[PATH_MAX]

Definition at line 35 of file emutools_files.c.