#[repr(transparent)]pub struct DataView { /* private fields */ }
Expand description
Implementations
The DataView
view provides a low-level interface for reading and
writing multiple number types in an ArrayBuffer
irrespective of the
platform’s endianness.
The ArrayBuffer referenced by this view. Fixed at construction time and thus read only.
The length (in bytes) of this view from the start of its ArrayBuffer. Fixed at construction time and thus read only.
The offset (in bytes) of this view from the start of its ArrayBuffer. Fixed at construction time and thus read only.
The getInt8()
method gets a signed 8-bit integer (byte) at the
specified byte offset from the start of the DataView.
The getUint8()
method gets a unsigned 8-bit integer (byte) at the specified
byte offset from the start of the DataView.
The getInt16()
method gets a signed 16-bit integer (short) at the specified
byte offset from the start of the DataView.
The getInt16()
method gets a signed 16-bit integer (short) at the specified
byte offset from the start of the DataView.
The getUint16()
method gets an unsigned 16-bit integer (unsigned short) at the specified
byte offset from the start of the view.
The getUint16()
method gets an unsigned 16-bit integer (unsigned short) at the specified
byte offset from the start of the view.
The getInt32()
method gets a signed 32-bit integer (long) at the specified
byte offset from the start of the DataView.
The getInt32()
method gets a signed 32-bit integer (long) at the specified
byte offset from the start of the DataView.
The getUint32()
method gets an unsigned 32-bit integer (unsigned long) at the specified
byte offset from the start of the view.
The getUint32()
method gets an unsigned 32-bit integer (unsigned long) at the specified
byte offset from the start of the view.
The getFloat32()
method gets a signed 32-bit float (float) at the specified
byte offset from the start of the DataView.
The getFloat32()
method gets a signed 32-bit float (float) at the specified
byte offset from the start of the DataView.
The getFloat64()
method gets a signed 64-bit float (double) at the specified
byte offset from the start of the DataView.
The getFloat64()
method gets a signed 64-bit float (double) at the specified
byte offset from the start of the DataView.
The setInt8()
method stores a signed 8-bit integer (byte) value at the
specified byte offset from the start of the DataView.
The setUint8()
method stores an unsigned 8-bit integer (byte) value at the
specified byte offset from the start of the DataView.
The setInt16()
method stores a signed 16-bit integer (short) value at the
specified byte offset from the start of the DataView.
The setInt16()
method stores a signed 16-bit integer (short) value at the
specified byte offset from the start of the DataView.
The setUint16()
method stores an unsigned 16-bit integer (unsigned short) value at the
specified byte offset from the start of the DataView.
The setUint16()
method stores an unsigned 16-bit integer (unsigned short) value at the
specified byte offset from the start of the DataView.
The setInt32()
method stores a signed 32-bit integer (long) value at the
specified byte offset from the start of the DataView.
The setInt32()
method stores a signed 32-bit integer (long) value at the
specified byte offset from the start of the DataView.
The setUint32()
method stores an unsigned 32-bit integer (unsigned long) value at the
specified byte offset from the start of the DataView.
The setUint32()
method stores an unsigned 32-bit integer (unsigned long) value at the
specified byte offset from the start of the DataView.
The setFloat32()
method stores a signed 32-bit float (float) value at the
specified byte offset from the start of the DataView.
The setFloat32()
method stores a signed 32-bit float (float) value at the
specified byte offset from the start of the DataView.
The setFloat64()
method stores a signed 64-bit float (double) value at the
specified byte offset from the start of the DataView.
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>
The constructor property returns a reference to the Object
constructor
function that created the instance object.
The hasOwnProperty()
method returns a boolean indicating whether the
object has the specified property as its own property (as opposed to
inheriting it).
The isPrototypeOf()
method checks if an object exists in another
object’s prototype chain.
The propertyIsEnumerable()
method returns a Boolean indicating
whether the specified property is enumerable.
The toLocaleString()
method returns a string representing the object.
This method is meant to be overridden by derived objects for
locale-specific purposes.
The toString()
method returns a string representing the object.
The valueOf()
method returns the primitive value of the
specified object.
Methods from Deref<Target = JsValue>
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
.
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.
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
.
Tests whether this JS value is undefined
Tests whether the type of this JS value is function
.
Applies the unary typeof
JS operator on a JsValue
.
Applies the binary in
JS operator on the two JsValue
s.
Compare two JsValue
s for equality, using the ==
operator in JS.
Applies the unary ~
JS operator on a JsValue
.
Applies the binary >>>
JS operator on the two JsValue
s.
Applies the binary /
JS operator on two JsValue
s, catching and returning any RangeError
thrown.
Applies the binary **
JS operator on the two JsValue
s.
Applies the binary <
JS operator on the two JsValue
s.
Applies the binary <=
JS operator on the two JsValue
s.
Applies the binary >=
JS operator on the two JsValue
s.
Applies the binary >
JS operator on the two JsValue
s.
Applies the unary +
JS operator on a JsValue
. Can throw.
Trait Implementations
Performs a dynamic instanceof
check to see whether the JsValue
provided is an instance of this type. Read more
Performs a zero-cost unchecked conversion from a JsValue
into an
instance of Self
Read more
Performs a zero-cost unchecked conversion from a &JsValue
into an
instance of &Self
. Read more
Test whether this JS value has a type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the
target type T
. Read more
Performs a dynamic cast (checked at runtime) of this value into the
target type T
. Read more
Performs a zero-cost unchecked cast into the specified type. Read more
Performs a zero-cost unchecked cast into a reference to the specified type. Read more
Test whether this JS value is an instance of the type T
. Read more
Performs a dynamic check to see whether the JsValue
provided
is a value of this type. Read more
type Abi = <JsValue as RefFromWasmAbi>::Abi
type Abi = <JsValue as RefFromWasmAbi>::Abi
The wasm ABI type references to Self
are recovered from.
type Anchor = ManuallyDrop<DataView>
type Anchor = ManuallyDrop<DataView>
The type that holds the reference to 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. Read more
Recover a Self::Anchor
from Self::Abi
. Read more
Auto Trait Implementations
impl RefUnwindSafe for DataView
impl UnwindSafe for DataView
Blanket Implementations
Mutably borrows from an owned value. Read more
type Abi = <T as IntoWasmAbi>::Abi
type Abi = <T as IntoWasmAbi>::Abi
Same as IntoWasmAbi::Abi
Same as IntoWasmAbi::into_abi
, except that it may throw and never
return in the case of Err
. Read more