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Code Issues Packages 1 Wiki Activity

internal: reorder Buffer's copyBytes arguments (#5021)

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Marcos Casagrande 2020-04-30 21:46:44 +02:00 committed by GitHub
parent 3e72d63205
commit 4297b865f9
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1 changed files with 5 additions and 5 deletions
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10
cli/js/buffer.ts
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@ -17,7 +17,7 @@ const MAX_SIZE = 2 ** 32 - 2;
// `off` is the offset into `dst` where it will at which to begin writing values
// from `src`.
// Returns the number of bytes copied.
function copyBytes(dst: Uint8Array, src: Uint8Array, off = 0): number {
function copyBytes(src: Uint8Array, dst: Uint8Array, off = 0): number {
const r = dst.byteLength - off;
if (src.byteLength > r) {
src = src.subarray(0, r);
@ -95,7 +95,7 @@ export class Buffer implements Reader, ReaderSync, Writer, WriterSync {
}
return null;
}
const nread = copyBytes(p, this.#buf.subarray(this.#off));
const nread = copyBytes(this.#buf.subarray(this.#off), p);
this.#off += nread;
return nread;
}
@ -107,7 +107,7 @@ export class Buffer implements Reader, ReaderSync, Writer, WriterSync {
writeSync(p: Uint8Array): number {
const m = this.#grow(p.byteLength);
return copyBytes(this.#buf, p, m);
return copyBytes(p, this.#buf, m);
}
write(p: Uint8Array): Promise<number> {
@ -132,13 +132,13 @@ export class Buffer implements Reader, ReaderSync, Writer, WriterSync {
// ArrayBuffer. We only need m+n <= c to slide, but
// we instead let capacity get twice as large so we
// don't spend all our time copying.
copyBytes(this.#buf, this.#buf.subarray(this.#off));
copyBytes(this.#buf.subarray(this.#off), this.#buf);
} else if (c > MAX_SIZE - c - n) {
throw new Error("The buffer cannot be grown beyond the maximum size.");
} else {
// Not enough space anywhere, we need to allocate.
const buf = new Uint8Array(2 * c + n);
copyBytes(buf, this.#buf.subarray(this.#off));
copyBytes(this.#buf.subarray(this.#off), buf);
this.#buf = buf;
}
// Restore this.#off and len(this.#buf).