hare

commit 46989986af14e7345f85b3f481030f8c7fe07dc4
parent f20f3a7b8ececdd939f47d3bee4ab9449c1e339f
Author: Sebastian <sebastian@sebsite.pw>
Date:   Sat, 14 May 2022 22:46:15 -0400

encoding::json: disallow unescaped control char in string

Signed-off-by: Sebastian <sebastian@sebsite.pw>

Diffstat:
M
encoding/json/lex.ha
 | 
5
+++++

1 file changed, 5 insertions(+), 0 deletions(-)
diff --git a/encoding/json/lex.ha b/encoding/json/lex.ha
@@ -250,6 +250,9 @@ fn scan_str(lex: *lexer) (token | error) = {
 			const rn = scan_escape(lex)?;
 			strio::appendrune(&lex.strbuf, rn)!;
 		case =>
+			if (iscntrl(rn)) {
+				return invalid;
+			};
 			strio::appendrune(&lex.strbuf, rn)!;
 		};
 	};
@@ -346,3 +349,5 @@ fn unget(lex: *lexer, r: rune) void = {
 	assert(lex.rb is void);
 	lex.rb = r;
 };
+
+fn iscntrl(r: rune) bool = r: u32 < 0x20;