RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 10:38:11 +00:00
Code Issues Activity Actions

LibJS: Add spec comments to quote_json_string

Browse source
This commit is contained in:
Nico Weber 2023-01-22 14:03:01 -05:00 • committed by Linus Groh
parent ba97f471ca
commit 868b358b1a
1 changed files with 15 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

16
Userland/Libraries/LibJS/Runtime/JSONObject.cpp
View file

@ -350,10 +350,15 @@ ThrowCompletionOr<DeprecatedString> JSONObject::serialize_json_array(VM& vm, Str
// 25.5.2.2 QuoteJSONString ( value ), https://tc39.es/ecma262/#sec-quotejsonstring
DeprecatedString JSONObject::quote_json_string(DeprecatedString string)
{
// 1. Let product be the String value consisting solely of the code unit 0x0022 (QUOTATION MARK).
StringBuilder builder;
builder.append('"');
// 2. For each code point C of StringToCodePoints(value), do
auto utf_view = Utf8View(string);
for (auto code_point : utf_view) {
// a. If C is listed in the “Code Point” column of Table 70, then
// i. Set product to the string-concatenation of product and the escape sequence for C as specified in the “Escape Sequence” column of the corresponding row.
switch (code_point) {
case '\b':
builder.append("\\b"sv);
@ -377,14 +382,23 @@ DeprecatedString JSONObject::quote_json_string(DeprecatedString string)
builder.append("\\\\"sv);
break;
default:
// b. Else if C has a numeric value less than 0x0020 (SPACE), or if C has the same numeric value as a leading surrogate or trailing surrogate, then
if (code_point < 0x20 || Utf16View::is_high_surrogate(code_point) || Utf16View::is_low_surrogate(code_point)) {
// i. Let unit be the code unit whose numeric value is that of C.
// ii. Set product to the string-concatenation of product and UnicodeEscape(unit).
builder.appendff("\\u{:04x}", code_point);
} else {
}
// c. Else,
else {
// i. Set product to the string-concatenation of product and UTF16EncodeCodePoint(C).
builder.append_code_point(code_point);
}
}
}
// 3. Set product to the string-concatenation of product and the code unit 0x0022 (QUOTATION MARK).
builder.append('"');
// 4. Return product.
return builder.to_deprecated_string();
}