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draft: implement bufferToString #45562

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kiliczsh wants to merge 9 commits into from
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draft: implement bufferToString #45562

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7106dc3
src: implement bufferToString
kiliczsh Nov 21, 2022
ab2c5b4
src: update bufferToString
kiliczsh Nov 21, 2022
48798ef
src: bufferToString argument checks
kiliczsh Nov 21, 2022
698f5e2
src: add string case for bufferToString
kiliczsh Nov 21, 2022
0be4196
src: fix errors for bufferToString
kiliczsh Nov 21, 2022
d84a7d4
src: add string case
kiliczsh Nov 21, 2022
bb557ae
src: fix check error and add string case
kiliczsh Nov 22, 2022
778ec39
src: add IsSharedArrayBuffer
kiliczsh Nov 22, 2022
b8cd296
src: fix for string
kiliczsh Nov 24, 2022
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33 changes: 18 additions & 15 deletions src/node_buffer.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -523,6 +523,8 @@ namespace {
// TODO: Buffer.from(buf, fromEnc).toString(buf, toEnc)
void BufferToString(const FunctionCallbackInfo<Value>& args) {
CHECK_GE(args.Length(), 3);

// TODO: btoa('a') is throwing error: assertion failed
CHECK(args[0]->IsArrayBuffer() || args[0]->IsSharedArrayBuffer() ||
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args[0]->IsArrayBufferView());
CHECK(args[1]->IsString());
Expand All @@ -534,30 +536,31 @@ void BufferToString(const FunctionCallbackInfo<Value>& args) {
enum encoding from_encoding = ParseEncoding(isolate, args[1], UTF8);
enum encoding to_encoding = ParseEncoding(isolate, args[2], UTF8);

Local<Value> error;
MaybeLocal<Value> maybe_ret;

if (args[0]->IsArrayBuffer() || args[0]->IsSharedArrayBuffer() ||
args[0]->IsArrayBufferView()) {
ArrayBufferViewContents<char> buffer(args[0]);

if (buffer.length() == 0) {
return args.GetReturnValue().SetEmptyString();
}
Local<Value> error;
MaybeLocal<Value> maybe_ret = StringBytes::Encode(
maybe_ret = StringBytes::Encode(
isolate, buffer.data(), buffer.length(), from_encoding, &error);

Local<Value> ret;
if (!maybe_ret.ToLocal(&ret)) {
CHECK(!error.IsEmpty());
isolate->ThrowException(error);
return;
}
args.GetReturnValue().Set(ret);
} else if (args[0]->IsString()) {
Local<Object> buf;
if (New(isolate, args[0].As<String>(), from_encoding).ToLocal(&buf)) {
args.GetReturnValue().Set(buf);
}
ArrayBufferViewContents<char> buffer(args[0]);
size_t length = buffer.length();
const char* data = buffer.data();
maybe_ret = StringBytes::Encode(
isolate, data, length, to_encoding, &error);
}
Local<Value> ret;
if (!maybe_ret.ToLocal(&ret)) {
CHECK(!error.IsEmpty());
isolate->ThrowException(error);
return;
}
args.GetReturnValue().Set(ret);
}

void CreateFromString(const FunctionCallbackInfo<Value>& args) {
Expand Down