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prorper escaping of null character

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This commit is contained in:
Karl Seguin
2026-02-20 18:44:54 +08:00
parent dec051a6e0
commit 2cb3f2d03d
2 changed files with 15 additions and 7 deletions
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8
src/browser/tests/css.html
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@@ -69,3 +69,11 @@
testing.expectEqual(true, CSS.supports('z-index', '10'));
}
</script>
<script id="escape_null_character">
{
testing.expectEqual('\uFFFD', CSS.escape('\x00'));
testing.expectEqual('test\uFFFDvalue', CSS.escape('test\x00value'));
testing.expectEqual('\uFFFDabc', CSS.escape('\x00abc'));
}
</script>

14
src/browser/webapi/CSS.zig
View File

@@ -141,16 +141,16 @@ fn hexDigitsNeeded(c: u8) usize {
}
fn writeEscape(comptime is_first: bool, buf: []u8, c: u8) usize {
if (c == 0) {
// NULL character becomes replacement character (no backslash)
const replacement = "\u{FFFD}";
@memcpy(buf[0..replacement.len], replacement);
return replacement.len;
}
buf[0] = '\\';
var data = buf[1..];
if (c == 0) {
// NULL character becomes replacement character
const replacement = "\u{FFFD}";
@memcpy(data[0..replacement.len], replacement);
return 1 + replacement.len;
}
if (isHexEscape(c) or ((comptime is_first) and c >= '0' and c <= '9')) {
const hex_str = std.fmt.bufPrint(data, "{x} ", .{c}) catch unreachable;
return 1 + hex_str.len;