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Add TypedArray#fill (#274)

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This commit is contained in:
Max Graey
2018-10-26 19:28:31 +03:00
committed by Daniel Wirtz
parent afb8fe7762
commit 83fa12164f
10 changed files with 4816 additions and 2062 deletions
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12
std/assembly/array.ts
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@ -119,11 +119,13 @@ export class Array<T> {
start = start < 0 ? max(len + start, 0) : min(start, len);
end = end < 0 ? max(len + end, 0) : min(end, len);
if (sizeof<T>() == 1) {
memory.fill(
changetype<usize>(buffer) + start + HEADER_SIZE,
<u8>value,
<usize>(end - start)
);
if (start < end) {
memory.fill(
changetype<usize>(buffer) + start + HEADER_SIZE,
<u8>value,
<usize>(end - start)
);
}
} else {
for (; start < end; ++start) {
storeUnsafe<T,T>(buffer, start, value);

24
std/assembly/internal/typedarray.ts
View File

@ -63,8 +63,30 @@ export abstract class TypedArray<T,V> {
// copyWithin(target: i32, start: i32, end: i32 = this.length): this
fill(value: V, start: i32 = 0, end: i32 = i32.MAX_VALUE): this {
var buffer = this.buffer;
var byteOffset = this.byteOffset;
var len = this.length;
start = start < 0 ? max(len + start, 0) : min(start, len);
end = end < 0 ? max(len + end, 0) : min(end, len);
if (sizeof<T>() == 1) {
if (start < end) {
memory.fill(
changetype<usize>(buffer) + start + byteOffset + AB_HEADER_SIZE,
<u8>value,
<usize>(end - start)
);
}
} else {
for (; start < end; ++start) {
storeUnsafeWithOffset<T,V>(buffer, start, value, byteOffset);
}
}
return this;
}
@inline
subarray(begin: i32 = 0, end: i32 = 0x7fffffff): TypedArray<T,V> {
subarray(begin: i32 = 0, end: i32 = i32.MAX_VALUE): TypedArray<T,V> {
var length = this.length;
if (begin < 0) begin = max(length + begin, 0);
else begin = min(begin, length);