Struct sdl2_sys::SDL_RWops

#[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,
}

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

impl Clone for SDL_RWops

fn clone(&self) -> SDL_RWops

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for SDL_RWops