playdate_fs/
seek.rs

1use core::ffi::c_int;
2
3
4#[derive(Debug, Clone, Copy)]
5/// Same as [`std::io::SeekFrom`].
6pub enum SeekFrom {
7	/// Sets the offset to the provided number of bytes.
8	///
9	/// Same as [`std::io::SeekFrom::Start`].
10	#[doc(alias = "sys::ffi::SEEK_SET")]
11	Start(c_int),
12
13	/// Sets the offset to the current position plus the specified number of
14	/// bytes.
15	///
16	/// It is possible to seek beyond the end of an object, but it's an error to
17	/// seek before byte 0.
18	///
19	/// Same as [`std::io::SeekFrom::Current`].
20	#[doc(alias = "sys::ffi::SEEK_CUR")]
21	Current(c_int),
22
23	/// Sets the offset to the size of this object plus the specified number of
24	/// bytes.
25	///
26	/// It is possible to seek beyond the end of an object, but it's an error to
27	/// seek before byte 0.
28	///
29	/// Same as [`std::io::SeekFrom::End`].
30	#[doc(alias = "sys::ffi::SEEK_END")]
31	End(c_int),
32}
33
34impl SeekFrom {
35	/// Split into [`whence`](Whence) and position.
36	pub const fn into_parts(self) -> (Whence, c_int) {
37		match self {
38			SeekFrom::Start(pos) => (Whence::Start, pos),
39			SeekFrom::Current(pos) => (Whence::Current, pos),
40			SeekFrom::End(pos) => (Whence::End, pos),
41		}
42	}
43}
44
45
46#[repr(u32)]
47#[derive(Debug, Clone, Copy)]
48pub enum Whence {
49	/// Equal to [`sys::ffi::SEEK_SET`].
50	#[doc(alias = "sys::ffi::SEEK_SET")]
51	Start = sys::ffi::SEEK_SET as _,
52
53	/// Equal to [`sys::ffi::SEEK_CUR`].
54	#[doc(alias = "sys::ffi::SEEK_CUR")]
55	Current = sys::ffi::SEEK_CUR as _,
56
57	/// Equal to [`sys::ffi::SEEK_END`].
58	#[doc(alias = "sys::ffi::SEEK_END")]
59	End = sys::ffi::SEEK_END as _,
60}
playdate_fs/seek.rs

playdate_fs/
seek.rs
