hare

commit a2e9cfc788855bb1fb636e90b9ddbf19a87564f9
parent 6391a5c245f57ff59eae1e4538076601e853916b
Author: Kirill Primak <vyivel@eclair.cafe>
Date:   Sat, 17 Sep 2022 19:04:34 +0300

encoding::utf8: validate rune in encoderune()

Signed-off-by: Kirill Primak <vyivel@eclair.cafe>

Diffstat:
M
encoding/utf8/encode.ha
 | 
3
+++

1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/encoding/utf8/encode.ha b/encoding/utf8/encode.ha
@@ -6,6 +6,9 @@
 // encoderune.
 export fn encoderune(r: rune) []u8 = {
 	let ch = r: u32, n = 0z, first = 0u8;
+	assert((ch < 0xD800 || ch > 0xDFFF) && ch <= 0x10FFFF,
+		"the rune is not a valid Unicode codepoint");
+
 	if (ch < 0x80) {
 		first = 0;
 		n = 1;