pub struct DataView { /* private fields */ }
Implementations§
source§impl DataView
impl DataView
source§impl DataView
impl DataView
The DataView
view provides a low-level interface for reading and
writing multiple number types in an ArrayBuffer
irrespective of the
platform’s endianness.
source§impl DataView
impl DataView
sourcepub fn buffer(&self) -> ArrayBuffer
pub fn buffer(&self) -> ArrayBuffer
The ArrayBuffer referenced by this view. Fixed at construction time and thus read only.
source§impl DataView
impl DataView
sourcepub fn byte_length(&self) -> usize
pub fn byte_length(&self) -> usize
The length (in bytes) of this view from the start of its ArrayBuffer. Fixed at construction time and thus read only.
source§impl DataView
impl DataView
sourcepub fn byte_offset(&self) -> usize
pub fn byte_offset(&self) -> usize
The offset (in bytes) of this view from the start of its ArrayBuffer. Fixed at construction time and thus read only.
source§impl DataView
impl DataView
source§impl DataView
impl DataView
source§impl DataView
impl DataView
source§impl DataView
impl DataView
sourcepub fn get_int16_endian(&self, byte_offset: usize, little_endian: bool) -> i16
pub fn get_int16_endian(&self, byte_offset: usize, little_endian: bool) -> i16
The getInt16()
method gets a signed 16-bit integer (short) at the specified
byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn get_uint16(&self, byte_offset: usize) -> u16
pub fn get_uint16(&self, byte_offset: usize) -> u16
The getUint16()
method gets an unsigned 16-bit integer (unsigned short) at the specified
byte offset from the start of the view.
source§impl DataView
impl DataView
sourcepub fn get_uint16_endian(&self, byte_offset: usize, little_endian: bool) -> u16
pub fn get_uint16_endian(&self, byte_offset: usize, little_endian: bool) -> u16
The getUint16()
method gets an unsigned 16-bit integer (unsigned short) at the specified
byte offset from the start of the view.
source§impl DataView
impl DataView
source§impl DataView
impl DataView
sourcepub fn get_int32_endian(&self, byte_offset: usize, little_endian: bool) -> i32
pub fn get_int32_endian(&self, byte_offset: usize, little_endian: bool) -> i32
The getInt32()
method gets a signed 32-bit integer (long) at the specified
byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn get_uint32(&self, byte_offset: usize) -> u32
pub fn get_uint32(&self, byte_offset: usize) -> u32
The getUint32()
method gets an unsigned 32-bit integer (unsigned long) at the specified
byte offset from the start of the view.
source§impl DataView
impl DataView
sourcepub fn get_uint32_endian(&self, byte_offset: usize, little_endian: bool) -> u32
pub fn get_uint32_endian(&self, byte_offset: usize, little_endian: bool) -> u32
The getUint32()
method gets an unsigned 32-bit integer (unsigned long) at the specified
byte offset from the start of the view.
source§impl DataView
impl DataView
sourcepub fn get_float32(&self, byte_offset: usize) -> f32
pub fn get_float32(&self, byte_offset: usize) -> f32
The getFloat32()
method gets a signed 32-bit float (float) at the specified
byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn get_float32_endian(&self, byte_offset: usize, little_endian: bool) -> f32
pub fn get_float32_endian(&self, byte_offset: usize, little_endian: bool) -> f32
The getFloat32()
method gets a signed 32-bit float (float) at the specified
byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn get_float64(&self, byte_offset: usize) -> f64
pub fn get_float64(&self, byte_offset: usize) -> f64
The getFloat64()
method gets a signed 64-bit float (double) at the specified
byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn get_float64_endian(&self, byte_offset: usize, little_endian: bool) -> f64
pub fn get_float64_endian(&self, byte_offset: usize, little_endian: bool) -> f64
The getFloat64()
method gets a signed 64-bit float (double) at the specified
byte offset from the start of the DataView.
source§impl DataView
impl DataView
source§impl DataView
impl DataView
source§impl DataView
impl DataView
source§impl DataView
impl DataView
sourcepub fn set_int16_endian(
&self,
byte_offset: usize,
value: i16,
little_endian: bool,
)
pub fn set_int16_endian( &self, byte_offset: usize, value: i16, little_endian: bool, )
The setInt16()
method stores a signed 16-bit integer (short) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_uint16(&self, byte_offset: usize, value: u16)
pub fn set_uint16(&self, byte_offset: usize, value: u16)
The setUint16()
method stores an unsigned 16-bit integer (unsigned short) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_uint16_endian(
&self,
byte_offset: usize,
value: u16,
little_endian: bool,
)
pub fn set_uint16_endian( &self, byte_offset: usize, value: u16, little_endian: bool, )
The setUint16()
method stores an unsigned 16-bit integer (unsigned short) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
source§impl DataView
impl DataView
sourcepub fn set_int32_endian(
&self,
byte_offset: usize,
value: i32,
little_endian: bool,
)
pub fn set_int32_endian( &self, byte_offset: usize, value: i32, little_endian: bool, )
The setInt32()
method stores a signed 32-bit integer (long) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_uint32(&self, byte_offset: usize, value: u32)
pub fn set_uint32(&self, byte_offset: usize, value: u32)
The setUint32()
method stores an unsigned 32-bit integer (unsigned long) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_uint32_endian(
&self,
byte_offset: usize,
value: u32,
little_endian: bool,
)
pub fn set_uint32_endian( &self, byte_offset: usize, value: u32, little_endian: bool, )
The setUint32()
method stores an unsigned 32-bit integer (unsigned long) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_float32(&self, byte_offset: usize, value: f32)
pub fn set_float32(&self, byte_offset: usize, value: f32)
The setFloat32()
method stores a signed 32-bit float (float) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_float32_endian(
&self,
byte_offset: usize,
value: f32,
little_endian: bool,
)
pub fn set_float32_endian( &self, byte_offset: usize, value: f32, little_endian: bool, )
The setFloat32()
method stores a signed 32-bit float (float) value at the
specified byte offset from the start of the DataView.
source§impl DataView
impl DataView
sourcepub fn set_float64(&self, byte_offset: usize, value: f64)
pub fn set_float64(&self, byte_offset: usize, value: f64)
The setFloat64()
method stores a signed 64-bit float (double) value at the
specified byte offset from the start of the DataView.
Methods from Deref<Target = Object>§
sourcepub fn constructor(&self) -> Function
pub fn constructor(&self) -> Function
The constructor property returns a reference to the Object
constructor
function that created the instance object.
sourcepub fn has_own_property(&self, property: &JsValue) -> bool
pub fn has_own_property(&self, property: &JsValue) -> bool
The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
sourcepub fn is_prototype_of(&self, value: &JsValue) -> bool
pub fn is_prototype_of(&self, value: &JsValue) -> bool
The isPrototypeOf()
method checks if an object exists in another
object’s prototype chain.
sourcepub fn property_is_enumerable(&self, property: &JsValue) -> bool
pub fn property_is_enumerable(&self, property: &JsValue) -> bool
The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
sourcepub fn to_locale_string(&self) -> JsString
pub fn to_locale_string(&self) -> JsString
The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
sourcepub fn to_string(&self) -> JsString
pub fn to_string(&self) -> JsString
The toString()
method returns a string representing the object.
Methods from Deref<Target = JsValue>§
pub const NULL: JsValue = _
pub const UNDEFINED: JsValue = _
pub const TRUE: JsValue = _
pub const FALSE: JsValue = _
sourcepub fn as_f64(&self) -> Option<f64>
pub fn as_f64(&self) -> Option<f64>
Returns the f64
value of this JS value if it’s an instance of a
number.
If this JS value is not an instance of a number then this returns
None
.
sourcepub fn as_string(&self) -> Option<String>
pub fn as_string(&self) -> Option<String>
If this JS value is a string value, this function copies the JS string
value into Wasm linear memory, encoded as UTF-8, and returns it as a
Rust String
.
To avoid the copying and re-encoding, consider the
JsString::try_from()
function from js-sys
instead.
If this JS value is not an instance of a string or if it’s not valid
utf-8 then this returns None
.
§UTF-16 vs UTF-8
JavaScript strings in general are encoded as UTF-16, but Rust strings
are encoded as UTF-8. This can cause the Rust string to look a bit
different than the JS string sometimes. For more details see the
documentation about the str
type which contains a few
caveats about the encodings.
sourcepub fn as_bool(&self) -> Option<bool>
pub fn as_bool(&self) -> Option<bool>
Returns the bool
value of this JS value if it’s an instance of a
boolean.
If this JS value is not an instance of a boolean then this returns
None
.
sourcepub fn is_undefined(&self) -> bool
pub fn is_undefined(&self) -> bool
Tests whether this JS value is undefined
sourcepub fn is_function(&self) -> bool
pub fn is_function(&self) -> bool
Tests whether the type of this JS value is function
.
sourcepub fn js_in(&self, obj: &JsValue) -> bool
pub fn js_in(&self, obj: &JsValue) -> bool
Applies the binary in
JS operator on the two JsValue
s.
sourcepub fn loose_eq(&self, other: &JsValue) -> bool
pub fn loose_eq(&self, other: &JsValue) -> bool
Compare two JsValue
s for equality, using the ==
operator in JS.
sourcepub fn unsigned_shr(&self, rhs: &JsValue) -> u32
pub fn unsigned_shr(&self, rhs: &JsValue) -> u32
Applies the binary >>>
JS operator on the two JsValue
s.
sourcepub fn checked_div(&self, rhs: &JsValue) -> JsValue
pub fn checked_div(&self, rhs: &JsValue) -> JsValue
Applies the binary /
JS operator on two JsValue
s, catching and returning any RangeError
thrown.
sourcepub fn pow(&self, rhs: &JsValue) -> JsValue
pub fn pow(&self, rhs: &JsValue) -> JsValue
Applies the binary **
JS operator on the two JsValue
s.
sourcepub fn lt(&self, other: &JsValue) -> bool
pub fn lt(&self, other: &JsValue) -> bool
Applies the binary <
JS operator on the two JsValue
s.
sourcepub fn le(&self, other: &JsValue) -> bool
pub fn le(&self, other: &JsValue) -> bool
Applies the binary <=
JS operator on the two JsValue
s.
sourcepub fn ge(&self, other: &JsValue) -> bool
pub fn ge(&self, other: &JsValue) -> bool
Applies the binary >=
JS operator on the two JsValue
s.
sourcepub fn gt(&self, other: &JsValue) -> bool
pub fn gt(&self, other: &JsValue) -> bool
Applies the binary >
JS operator on the two JsValue
s.
sourcepub fn unchecked_into_f64(&self) -> f64
pub fn unchecked_into_f64(&self) -> f64
Applies the unary +
JS operator on a JsValue
. Can throw.
Trait Implementations§
source§impl FromWasmAbi for DataView
impl FromWasmAbi for DataView
source§impl<'a> IntoWasmAbi for &'a DataView
impl<'a> IntoWasmAbi for &'a DataView
source§impl IntoWasmAbi for DataView
impl IntoWasmAbi for DataView
source§impl JsCast for DataView
impl JsCast for DataView
source§fn instanceof(val: &JsValue) -> bool
fn instanceof(val: &JsValue) -> bool
instanceof
check to see whether the JsValue
provided is an instance of this type. Read moresource§fn unchecked_from_js(val: JsValue) -> DataView
fn unchecked_from_js(val: JsValue) -> DataView
source§fn unchecked_from_js_ref(val: &JsValue) -> &DataView
fn unchecked_from_js_ref(val: &JsValue) -> &DataView
source§fn has_type<T>(&self) -> boolwhere
T: JsCast,
fn has_type<T>(&self) -> boolwhere
T: JsCast,
T
. Read moresource§fn dyn_into<T>(self) -> Result<T, Self>where
T: JsCast,
fn dyn_into<T>(self) -> Result<T, Self>where
T: JsCast,
T
. Read moresource§fn dyn_ref<T>(&self) -> Option<&T>where
T: JsCast,
fn dyn_ref<T>(&self) -> Option<&T>where
T: JsCast,
T
. Read moresource§fn unchecked_into<T>(self) -> Twhere
T: JsCast,
fn unchecked_into<T>(self) -> Twhere
T: JsCast,
source§fn unchecked_ref<T>(&self) -> &Twhere
T: JsCast,
fn unchecked_ref<T>(&self) -> &Twhere
T: JsCast,
source§impl LongRefFromWasmAbi for DataView
impl LongRefFromWasmAbi for DataView
source§unsafe fn long_ref_from_abi(
js: <DataView as LongRefFromWasmAbi>::Abi,
) -> <DataView as LongRefFromWasmAbi>::Anchor
unsafe fn long_ref_from_abi( js: <DataView as LongRefFromWasmAbi>::Abi, ) -> <DataView as LongRefFromWasmAbi>::Anchor
RefFromWasmAbi::ref_from_abi
source§impl OptionFromWasmAbi for DataView
impl OptionFromWasmAbi for DataView
source§impl<'a> OptionIntoWasmAbi for &'a DataView
impl<'a> OptionIntoWasmAbi for &'a DataView
source§impl OptionIntoWasmAbi for DataView
impl OptionIntoWasmAbi for DataView
source§impl RefFromWasmAbi for DataView
impl RefFromWasmAbi for DataView
source§type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
Self
are recovered from.source§type Anchor = ManuallyDrop<DataView>
type Anchor = ManuallyDrop<DataView>
Self
for the duration of the
invocation of the function that has an &Self
parameter. This is
required to ensure that the lifetimes don’t persist beyond one function
call, and so that they remain anonymous.source§unsafe fn ref_from_abi(
js: <DataView as RefFromWasmAbi>::Abi,
) -> <DataView as RefFromWasmAbi>::Anchor
unsafe fn ref_from_abi( js: <DataView as RefFromWasmAbi>::Abi, ) -> <DataView as RefFromWasmAbi>::Anchor
impl Eq for DataView
impl StructuralPartialEq for DataView
Auto Trait Implementations§
impl Freeze for DataView
impl RefUnwindSafe for DataView
impl !Send for DataView
impl !Sync for DataView
impl Unpin for DataView
impl UnwindSafe for DataView
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)source§impl<T> ReturnWasmAbi for Twhere
T: IntoWasmAbi,
impl<T> ReturnWasmAbi for Twhere
T: IntoWasmAbi,
source§type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
IntoWasmAbi::Abi
source§fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
fn return_abi(self) -> <T as ReturnWasmAbi>::Abi
IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
.