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file.odin
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file.odin
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package os2
import "core:io"
import "core:time"
import "base:runtime"
/*
Type representing a file handle.
This struct represents an OS-specific file-handle, which can be one of
the following:
- File
- Directory
- Pipe
- Named pipe
- Block Device
- Character device
- Symlink
- Socket
See `File_Type` enum for more information on file types.
*/
File :: struct {
impl: rawptr,
stream: io.Stream,
fstat: Fstat_Callback,
}
/*
Type representing the type of a file handle.
**Note(windows)**: Socket handles can not be distinguished from
files, as they are just a normal file handle that is being treated by
a special driver. Windows also makes no distinction between block and
character devices.
*/
File_Type :: enum {
// The type of a file could not be determined for the current platform.
Undetermined,
// Represents a regular file.
Regular,
// Represents a directory.
Directory,
// Represents a symbolic link.
Symlink,
// Represents a named pipe (FIFO).
Named_Pipe,
// Represents a socket.
// **Note(windows)**: Not returned on windows
Socket,
// Represents a block device.
// **Note(windows)**: On windows represents all devices.
Block_Device,
// Represents a character device.
// **Note(windows)**: Not returned on windows
Character_Device,
}
File_Flags :: distinct bit_set[File_Flag; uint]
File_Flag :: enum {
Read,
Write,
Append,
Create,
Excl,
Sync,
Trunc,
Sparse,
Inheritable,
Unbuffered_IO,
}
O_RDONLY :: File_Flags{.Read}
O_WRONLY :: File_Flags{.Write}
O_RDWR :: File_Flags{.Read, .Write}
O_APPEND :: File_Flags{.Append}
O_CREATE :: File_Flags{.Create}
O_EXCL :: File_Flags{.Excl}
O_SYNC :: File_Flags{.Sync}
O_TRUNC :: File_Flags{.Trunc}
O_SPARSE :: File_Flags{.Sparse}
/*
If specified, the file handle is inherited upon the creation of a child
process. By default all handles are created non-inheritable.
**Note**: The standard file handles (stderr, stdout and stdin) are always
initialized as inheritable.
*/
O_INHERITABLE :: File_Flags{.Inheritable}
stdin: ^File = nil // OS-Specific
stdout: ^File = nil // OS-Specific
stderr: ^File = nil // OS-Specific
@(require_results)
create :: proc(name: string) -> (^File, Error) {
return open(name, {.Read, .Write, .Create}, 0o777)
}
@(require_results)
open :: proc(name: string, flags := File_Flags{.Read}, perm := 0o777) -> (^File, Error) {
return _open(name, flags, perm)
}
// @(require_results)
// open_buffered :: proc(name: string, buffer_size: uint, flags := File_Flags{.Read}, perm := 0o777) -> (^File, Error) {
// if buffer_size == 0 {
// return _open(name, flags, perm)
// }
// return _open_buffered(name, buffer_size, flags, perm)
// }
@(require_results)
new_file :: proc(handle: uintptr, name: string) -> ^File {
file, err := _new_file(handle, name)
if err != nil {
panic(error_string(err))
}
return file
}
@(require_results)
fd :: proc(f: ^File) -> uintptr {
return _fd(f)
}
@(require_results)
name :: proc(f: ^File) -> string {
return _name(f)
}
/*
Close a file and its stream.
Any further use of the file or its stream should be considered to be in the
same class of bugs as a use-after-free.
*/
close :: proc(f: ^File) -> Error {
if f != nil {
return io.close(f.stream)
}
return nil
}
seek :: proc(f: ^File, offset: i64, whence: io.Seek_From) -> (ret: i64, err: Error) {
if f != nil {
return io.seek(f.stream, offset, whence)
}
return 0, .Invalid_File
}
read :: proc(f: ^File, p: []byte) -> (n: int, err: Error) {
if f != nil {
return io.read(f.stream, p)
}
return 0, .Invalid_File
}
read_at :: proc(f: ^File, p: []byte, offset: i64) -> (n: int, err: Error) {
if f != nil {
return io.read_at(f.stream, p, offset)
}
return 0, .Invalid_File
}
write :: proc(f: ^File, p: []byte) -> (n: int, err: Error) {
if f != nil {
return io.write(f.stream, p)
}
return 0, .Invalid_File
}
write_at :: proc(f: ^File, p: []byte, offset: i64) -> (n: int, err: Error) {
if f != nil {
return io.write_at(f.stream, p, offset)
}
return 0, .Invalid_File
}
file_size :: proc(f: ^File) -> (n: i64, err: Error) {
if f != nil {
return io.size(f.stream)
}
return 0, .Invalid_File
}
flush :: proc(f: ^File) -> Error {
if f != nil {
return io.flush(f.stream)
}
return nil
}
sync :: proc(f: ^File) -> Error {
return _sync(f)
}
truncate :: proc(f: ^File, size: i64) -> Error {
return _truncate(f, size)
}
remove :: proc(name: string) -> Error {
return _remove(name)
}
rename :: proc(old_path, new_path: string) -> Error {
return _rename(old_path, new_path)
}
link :: proc(old_name, new_name: string) -> Error {
return _link(old_name, new_name)
}
symlink :: proc(old_name, new_name: string) -> Error {
return _symlink(old_name, new_name)
}
read_link :: proc(name: string, allocator: runtime.Allocator) -> (string, Error) {
return _read_link(name,allocator)
}
chdir :: change_directory
change_directory :: proc(name: string) -> Error {
return _chdir(name)
}
chmod :: change_mode
change_mode :: proc(name: string, mode: int) -> Error {
return _chmod(name, mode)
}
chown :: change_owner
change_owner :: proc(name: string, uid, gid: int) -> Error {
return _chown(name, uid, gid)
}
fchdir :: fchange_directory
fchange_directory :: proc(f: ^File) -> Error {
return _fchdir(f)
}
fchmod :: fchange_mode
fchange_mode :: proc(f: ^File, mode: int) -> Error {
return _fchmod(f, mode)
}
fchown :: fchange_owner
fchange_owner :: proc(f: ^File, uid, gid: int) -> Error {
return _fchown(f, uid, gid)
}
lchown :: change_owner_do_not_follow_links
change_owner_do_not_follow_links :: proc(name: string, uid, gid: int) -> Error {
return _lchown(name, uid, gid)
}
chtimes :: change_times
change_times :: proc(name: string, atime, mtime: time.Time) -> Error {
return _chtimes(name, atime, mtime)
}
fchtimes :: fchange_times
fchange_times :: proc(f: ^File, atime, mtime: time.Time) -> Error {
return _fchtimes(f, atime, mtime)
}
@(require_results)
exists :: proc(path: string) -> bool {
return _exists(path)
}
@(require_results)
is_file :: proc(path: string) -> bool {
TEMP_ALLOCATOR_GUARD()
fi, err := stat(path, temp_allocator())
if err != nil {
return false
}
return fi.type == .Regular
}
is_dir :: is_directory
@(require_results)
is_directory :: proc(path: string) -> bool {
TEMP_ALLOCATOR_GUARD()
fi, err := stat(path, temp_allocator())
if err != nil {
return false
}
return fi.type == .Directory
}
copy_file :: proc(dst_path, src_path: string) -> Error {
src := open(src_path) or_return
defer close(src)
info := fstat(src, file_allocator()) or_return
defer file_info_delete(info, file_allocator())
if info.type == .Directory {
return .Invalid_File
}
dst := open(dst_path, {.Read, .Write, .Create, .Trunc}, info.mode & 0o777) or_return
defer close(dst)
_, err := io.copy(to_writer(dst), to_reader(src))
return err
}