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js_printer utf16 fix

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pfg
2025-07-23 20:35:41 -07:00
parent 9b61830918
commit 5a36d29b29
1 changed files with 3 additions and 8 deletions
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11
src/js_printer.zig
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@@ -159,10 +159,10 @@ pub fn writePreQuotedString(comptime encoding: strings.Encoding, text: []const e
const width = switch (comptime encoding) {
.latin1, .ascii => 1,
.utf8 => strings.wtf8ByteSequenceLengthWithInvalid(text[i]),
.utf16 => 1,
.utf16 => strings.utf16CodepointWithFFFD([]const u16, text[i..]).len,
};
const clamped_width = @min(@as(usize, width), n -| i);
const c = switch (encoding) {
const c: i32 = switch (encoding) {
.utf8 => strings.decodeWTF8RuneT(
&switch (clamped_width) {
// 0 is not returned by `wtf8ByteSequenceLengthWithInvalid`
@@ -177,12 +177,7 @@ pub fn writePreQuotedString(comptime encoding: strings.Encoding, text: []const e
0,
),
.ascii, .latin1 => text[i],
.utf16 => brk: {
// TODO: if this is a part of a surrogate pair, we could parse the whole codepoint in order
// to emit it as a single \u{result} rather than two paired \uLOW\uHIGH.
// eg: "\u{10334}" will convert to "\uD800\uDF34" without this.
break :brk @as(i32, text[i]);
},
.utf16 => @bitCast(strings.utf16CodepointWithFFFD([]const u16, text[i..]).code_point),
};
if (canPrintWithoutEscape(i32, c, ascii_only)) {
const remain = text[i + clamped_width ..];