mirror of
https://github.com/denoland/rusty_v8.git
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92f7d41a4c
Co-authored-by: Luca Casonato <hello@lcas.dev> Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
101 lines
2.6 KiB
Rust
101 lines
2.6 KiB
Rust
// Copyright 2019-2021 the Deno authors. All rights reserved. MIT license.
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use crate::support::size_t;
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use crate::ArrayBuffer;
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use crate::HandleScope;
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use crate::Local;
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use crate::TypedArray;
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extern "C" {
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fn v8__TypedArray__kMaxByteLength() -> size_t;
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fn v8__TypedArray__Length(this: *const TypedArray) -> size_t;
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}
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impl TypedArray {
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/// The largest supported typed array byte size. Each subclass defines a
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/// type-specific max_length for the maximum length that can be passed to new.
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#[inline(always)]
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pub fn max_byte_length() -> usize {
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unsafe { v8__TypedArray__kMaxByteLength() }
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}
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/// Number of elements in this typed array
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/// (e.g. for Int16Array, |ByteLength|/2).
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#[inline(always)]
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pub fn length(&self) -> usize {
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unsafe { v8__TypedArray__Length(self) }
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}
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}
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macro_rules! typed_array {
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($name:ident, $new_func:ident, $max_length_func:ident) => {
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use crate::$name;
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impl $name {
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#[inline(always)]
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pub fn new<'s>(
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scope: &mut HandleScope<'s>,
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buf: Local<ArrayBuffer>,
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byte_offset: usize,
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length: usize,
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) -> Option<Local<'s, $name>> {
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extern "C" {
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fn $new_func(
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buf_ptr: *const ArrayBuffer,
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byte_offset: usize,
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length: usize,
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) -> *const $name;
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}
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unsafe { scope.cast_local(|_| $new_func(&*buf, byte_offset, length)) }
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}
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#[doc = concat!("The largest ", stringify!($name), " size that can be constructed using `new`.")]
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#[inline(always)]
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pub fn max_length() -> usize {
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extern "C" {
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fn $max_length_func() -> usize;
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}
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unsafe { $max_length_func() }
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}
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}
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};
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}
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typed_array!(Uint8Array, v8__Uint8Array__New, v8__Uint8Array__kMaxLength);
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typed_array!(
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Uint8ClampedArray,
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v8__Uint8ClampedArray__New,
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v8__Uint8ClampedArray__kMaxLength
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);
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typed_array!(Int8Array, v8__Int8Array__New, v8__Int8Array__kMaxLength);
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typed_array!(
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Uint16Array,
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v8__Uint16Array__New,
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v8__Uint16Array__kMaxLength
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);
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typed_array!(Int16Array, v8__Int16Array__New, v8__Int16Array__kMaxLength);
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typed_array!(
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Uint32Array,
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v8__Uint32Array__New,
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v8__Uint32Array__kMaxLength
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);
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typed_array!(Int32Array, v8__Int32Array__New, v8__Int32Array__kMaxLength);
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typed_array!(
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Float32Array,
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v8__Float32Array__New,
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v8__Float32Array__kMaxLength
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);
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typed_array!(
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Float64Array,
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v8__Float64Array__New,
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v8__Float64Array__kMaxLength
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);
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typed_array!(
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BigUint64Array,
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v8__BigUint64Array__New,
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v8__BigUint64Array__kMaxLength
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);
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typed_array!(
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BigInt64Array,
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v8__BigInt64Array__New,
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v8__BigInt64Array__kMaxLength
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);
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