Struct xpcom::interfaces::nsISeekableStream

#[repr(C)]
pub struct nsISeekableStream { /* fields omitted */ }

interface nsISeekableStream : nsISupports

Methods

impl nsISeekableStream

pub fn coerce<T: nsISeekableStreamCoerce>(&self) -> &T

Cast this nsISeekableStream to one of its base interfaces.

impl nsISeekableStream

pub const NS_SEEK_SET: i64

NS_SEEK_SET: i64 = 0

pub const NS_SEEK_CUR: i64

NS_SEEK_CUR: i64 = 1

pub const NS_SEEK_END: i64

NS_SEEK_END: i64 = 2

pub unsafe fn Seek(&self, whence: int32_t, offset: int64_t) -> nsresult

/**
     *  seek
     *
     *  This method moves the stream offset of the steam implementing this
     *  interface.
     *
     *   @param whence specifies how to interpret the 'offset' parameter in
     *                 setting the stream offset associated with the implementing
     *                 stream.
     *
     *   @param offset specifies a value, in bytes, that is used in conjunction
     *                 with the 'whence' parameter to set the stream offset of the
     *                 implementing stream.  A negative value causes seeking in
     *                 the reverse direction.
     *
     *   @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
     */

void seek (in long whence, in long long offset);

pub unsafe fn Tell(&self, _retval: *mut int64_t) -> nsresult

/**
     *  tell
     *
     *  This method reports the current offset, in bytes, from the start of the
     *  stream.
     *
     *   @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
     */

long long tell ();

pub unsafe fn SetEOF(&self) -> nsresult

/**
     *  setEOF
     *
     *  This method truncates the stream at the current offset.
     *
     *   @throws NS_BASE_STREAM_CLOSED if called on a closed stream.
     */

void setEOF ();

Methods from Deref<Target = nsISupports>

pub fn coerce<T: nsISupportsCoerce>(&self) -> &T

Cast this nsISupports to one of its base interfaces.

pub unsafe fn QueryInterface(
    &self,
    uuid: &nsIID,
    result: *mut *mut c_void
) -> nsresult

void QueryInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result);

pub unsafe fn AddRef(&self) -> nsrefcnt

[noscript,notxpcom] nsrefcnt AddRef ();

pub unsafe fn Release(&self) -> nsrefcnt

[noscript,notxpcom] nsrefcnt Release ();

Trait Implementations

impl XpCom for nsISeekableStream

const IID: nsIID

IID: nsIID = nsID(2217333584, 4160, 18017, [139, 113, 242, 166, 186, 69, 89, 128])

fn query_interface<T: XpCom>(&self) -> Option<RefPtr<T>>

Perform a QueryInterface call on this object, attempting to dynamically cast it to the requested interface type. Returns Some(RefPtr) if the cast succeeded, and None otherwise.

impl RefCounted for nsISeekableStream

unsafe fn addref(&self)

Increment the reference count.

unsafe fn release(&self)

Decrement the reference count, potentially freeing backing memory.

impl Deref for nsISeekableStream

type Target = nsISupports

The resulting type after dereferencing.

fn deref(&self) -> &nsISupports

Dereferences the value.