From 84de66e6147d2fb50f84001a297cf941083849f9 Mon Sep 17 00:00:00 2001
From: "Claudius \"keldu\" Holeksa" <mail@keldu.de>
Date: Thu, 29 Jun 2023 20:20:15 +0200
Subject: c++,codec-json: Fixed unicode and control sequence handling

---
 src/codec-json/json.tmpl.h | 24 +++++++++++++++++++-----
 1 file changed, 19 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/codec-json/json.tmpl.h b/src/codec-json/json.tmpl.h
index 3d3ad91..9a28fe9 100644
--- a/src/codec-json/json.tmpl.h
+++ b/src/codec-json/json.tmpl.h
@@ -445,11 +445,25 @@ struct json_decode<schema::String, RootSchema, ToDecode> {
 					}
 				} break;
 			case '"':
-				  string_done = true;
-				  break;
-			default:
-				  iss<<buff.read();
-				  break;
+					string_done = true;
+					break;
+			default:{
+					// Avoids Control sequences
+					if(buff.read() >= ' ' && buff.read() <= '~'){
+						iss<<buff.read();
+					}
+					// Avoid Unicode
+					else if (buff.read() < 0) {
+						do {
+							buff.read_advance(1);
+							if(buff.read_composite_length() == 0){
+								return make_error<err::buffer_exhausted>();
+							}
+						} while( buff.read() < 0 );
+						iss<<'?';
+					}
+					break;
+				}
 			}
 			buff.read_advance(1);
 		}
-- 
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