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util: extract out encoding validation functions #18421

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util: extract out encoding validation functions #18421

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f06ac13
Extract out encoding validation functions
timotew Jan 28, 2018
8f4a276
splitting out validateEncoder() and validateDecoder()
timotew Jan 29, 2018
b83472d
remove check for isArrayBufferView
timotew Jan 31, 2018
9ee5f96
split the buffer validation
timotew Jan 31, 2018
077c258
revert validate buffer
timotew Jan 31, 2018
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42 changes: 21 additions & 21 deletions lib/internal/encoding.js
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Original file line number Diff line number Diff line change
Expand Up @@ -42,9 +42,15 @@ function validateDecoder(obj) {
throw new errors.TypeError('ERR_INVALID_THIS', 'TextDecoder');
}

function validateArgument(prop, expected, propName) {
if (typeof prop !== expected.toLowerCase())
throw new errors.Error('ERR_INVALID_ARG_TYPE', propName, expected);
function validateArgument(prop, expected, propName, expectedName) {
if (typeof prop !== expected)
throw new errors.Error('ERR_INVALID_ARG_TYPE', propName, expectedName);
}

function validateArgumentBuffer(prop, propName) {
if (!isArrayBuffer(prop) || !isArrayBufferView(prop))
throw new errors.Error('ERR_INVALID_ARG_TYPE', propName,
['ArrayBuffer', 'ArrayBufferView']);
}

const CONVERTER_FLAGS_FLUSH = 0x1;
Expand Down Expand Up @@ -341,7 +347,7 @@ const { hasConverter, TextDecoder } =
makeTextDecoderJS();

function hasTextDecoder(encoding = 'utf-8') {
validateArgument(encoding, 'string', 'encoding');
validateArgument(encoding, 'string', 'encoding', 'string');
return hasConverter(getEncodingFromLabel(encoding));
}

Expand All @@ -355,7 +361,7 @@ function makeTextDecoderICU() {
class TextDecoder {
constructor(encoding = 'utf-8', options = {}) {
encoding = `${encoding}`;
validateArgument(options, 'Object', 'options');
validateArgument(options, 'object', 'options', 'Object');

const enc = getEncodingFromLabel(encoding);
if (enc === undefined)
Expand All @@ -380,13 +386,12 @@ function makeTextDecoderICU() {

decode(input = empty, options = {}) {
validateDecoder(this);
if (isArrayBuffer(input)) {
validateArgumentBuffer(input, 'input');

if (isArrayBuffer(input))
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This results in a second isArrayBuffer check and is definitely not desirable. Please keep that check as it was before (as in: remove validateArgumentBuffer again).

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ok.

input = lazyBuffer().from(input);
} else if (!isArrayBufferView(input)) {
throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'input',
['ArrayBuffer', 'ArrayBufferView']);
}
validateArgument(options, 'Object', 'options');

validateArgument(options, 'object', 'options', 'Object');

var flags = 0;
if (options !== null)
Expand Down Expand Up @@ -423,7 +428,7 @@ function makeTextDecoderJS() {
class TextDecoder {
constructor(encoding = 'utf-8', options = {}) {
encoding = `${encoding}`;
validateArgument(options, 'Object', 'options');
validateArgument(options, 'object', 'options', 'Object');

const enc = getEncodingFromLabel(encoding);
if (enc === undefined || !hasConverter(enc))
Expand All @@ -447,16 +452,11 @@ function makeTextDecoderJS() {

decode(input = empty, options = {}) {
validateDecoder(this);
if (isArrayBuffer(input)) {
validateArgumentBuffer(input, 'input');

if (isArrayBuffer(input))
input = lazyBuffer().from(input);
} else if (isArrayBufferView(input)) {
input = lazyBuffer().from(input.buffer, input.byteOffset,
input.byteLength);
} else {
throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'input',
['ArrayBuffer', 'ArrayBufferView']);
}
validateArgument(options, 'Object', 'options');
validateArgument(options, 'object', 'options', 'Object');

if (this[kFlags] & CONVERTER_FLAGS_FLUSH) {
this[kBOMSeen] = false;
Expand Down