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Use TypedArray

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deror1869107 2017-01-23 08:11:44 +08:00 • committed by Josh Matthews
parent aea6797a94
commit 6c4ce7247f
2 changed files with 37 additions and 92 deletions
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55
components/script/dom/bindings/conversions.rs
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@ -47,7 +47,7 @@ use js::glue::{GetProxyPrivate, IsWrapper};
use js::glue::{RUST_JSID_IS_INT, RUST_JSID_TO_INT};
use js::glue::{RUST_JSID_IS_STRING, RUST_JSID_TO_STRING, UnwrapObject};
use js::jsapi::{HandleId, HandleObject, HandleValue, JSContext};
use js::jsapi::{JSObject, JSString, JS_GetArrayBufferViewType};
use js::jsapi::{JSObject, JSString};
use js::jsapi::{JS_GetLatin1StringCharsAndLength, JS_GetObjectAsArrayBuffer, JS_GetObjectAsArrayBufferView};
use js::jsapi::{JS_GetReservedSlot, JS_GetTwoByteStringCharsAndLength};
use js::jsapi::{JS_IsArrayObject, JS_NewStringCopyN, JS_StringHasLatin1Chars};
@ -572,59 +572,6 @@ pub unsafe fn array_buffer_view_data<'a, T>(abv: *mut JSObject) -> Option<&'a mu
Some(slice::from_raw_parts_mut(ptr as *mut T, byte_length as usize / mem::size_of::<T>()))
}
/// Returns a copy of the ArrayBufferView data, viewed as T, without checking
/// the real type of it.
pub unsafe fn array_buffer_view_to_vec<T>(abv: *mut JSObject) -> Option<Vec<T>>
where T: ArrayBufferViewContents
{
array_buffer_view_data(abv).map(|data| data.to_vec())
}
/// Returns a mutable slice of the Array Buffer View data, viewed as T, checking
/// that the real type of it is ty.
pub unsafe fn array_buffer_view_data_checked<'a, T>(abv: *mut JSObject) -> Option<&'a mut [T]>
where T: ArrayBufferViewContents
{
array_buffer_view_data::<T>(abv).and_then(|data| {
if T::is_type_compatible(JS_GetArrayBufferViewType(abv)) {
Some(data)
} else {
None
}
})
}
/// Returns a copy of the ArrayBufferView data, viewed as T, checking that the
/// real type of it is ty.
pub unsafe fn array_buffer_view_to_vec_checked<T>(abv: *mut JSObject) -> Option<Vec<T>>
where T: ArrayBufferViewContents
{
array_buffer_view_data_checked(abv).map(|data| data.to_vec())
}
/// Similar API as the array_buffer_view_xxx functions, but for ArrayBuffer
/// objects.
pub unsafe fn array_buffer_data<'a, T>(ab: *mut JSObject) -> Option<&'a mut [T]>
where T: ArrayBufferViewContents
{
assert!(!ab.is_null());
let mut byte_length = 0;
let mut ptr = ptr::null_mut();
let ret = JS_GetObjectAsArrayBuffer(ab, &mut byte_length, &mut ptr);
if ret.is_null() {
return None;
}
Some(slice::from_raw_parts_mut(ptr as *mut T, byte_length as usize / mem::size_of::<T>()))
}
/// Similar API to array_buffer_view_to_vec, but for ArrayBuffer objects.
pub unsafe fn array_buffer_to_vec<T>(ab: *mut JSObject) -> Option<Vec<T>>
where T: ArrayBufferViewContents
{
array_buffer_data(ab).map(|data| data.to_vec())
}
/// Returns whether `value` is an array-like object.
/// Note: Currently only Arrays are supported.
/// TODO: Expand this to support sequences and other array-like objects