Struct sdl2_sys::SDL_RWops

source ·
#[repr(C)]
pub struct SDL_RWops { pub size: Option<unsafe extern "C" fn(context: *mut SDL_RWops) -> Sint64>, pub seek: Option<unsafe extern "C" fn(context: *mut SDL_RWops, offset: Sint64, whence: c_int) -> Sint64>, pub read: Option<unsafe extern "C" fn(context: *mut SDL_RWops, ptr: *mut c_void, size: usize, maxnum: usize) -> usize>, pub write: Option<unsafe extern "C" fn(context: *mut SDL_RWops, ptr: *const c_void, size: usize, num: usize) -> usize>, pub close: Option<unsafe extern "C" fn(context: *mut SDL_RWops) -> c_int>, pub type_: Uint32, pub hidden: SDL_RWops__bindgen_ty_1, }
Expand description

This is the read/write operation structure – very basic.

Fields§

§size: Option<unsafe extern "C" fn(context: *mut SDL_RWops) -> Sint64>

Return the size of the file in this rwops, or -1 if unknown

§seek: Option<unsafe extern "C" fn(context: *mut SDL_RWops, offset: Sint64, whence: c_int) -> Sint64>

Seek to \c offset relative to \c whence, one of stdio’s whence values: RW_SEEK_SET, RW_SEEK_CUR, RW_SEEK_END

\return the final offset in the data stream, or -1 on error.

§read: Option<unsafe extern "C" fn(context: *mut SDL_RWops, ptr: *mut c_void, size: usize, maxnum: usize) -> usize>

Read up to \c maxnum objects each of size \c size from the data stream to the area pointed at by \c ptr.

\return the number of objects read, or 0 at error or end of file.

§write: Option<unsafe extern "C" fn(context: *mut SDL_RWops, ptr: *const c_void, size: usize, num: usize) -> usize>

Write exactly \c num objects each of size \c size from the area pointed at by \c ptr to data stream.

\return the number of objects written, or 0 at error or end of file.

§close: Option<unsafe extern "C" fn(context: *mut SDL_RWops) -> c_int>

Close and free an allocated SDL_RWops structure.

\return 0 if successful or -1 on write error when flushing data.

§type_: Uint32§hidden: SDL_RWops__bindgen_ty_1

Trait Implementations§

source§

impl Clone for SDL_RWops

source§

fn clone(&self) -> SDL_RWops

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
source§

impl Copy for SDL_RWops

Auto Trait Implementations§

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.