feat: add local test executable and improve JSON string escaping - Added option to build a local test executable for value assignments. - Enhanced JSON string formatting by escaping special characters. - Updated README with build instructions and prerequisites. - Modified .gitignore to include .vscode directory. - Added file read/write tests in format_test.cpp. - Refactored value assignment logic to reduce code duplication.

Signed-off-by: YongDo-Hyun <froster12@naver.com>

1 files changed, 28 insertions, 1 deletions

diff --git a/src/text/json_formatter.cpp b/src/text/json_formatter.cpp
index efa807f58c..bd882c15d2 100644
--- a/src/text/json_formatter.cpp
+++ b/src/text/json_formatter.cpp
@@ -71,7 +71,11 @@ namespace //anonymous
         { os << "[" << ba.size() << " bytes]"; }
 
         void visit(const tag_string& s) override
-        { os << '"' << s.get() << '"'; } //TODO: escape special characters
+        {
+            os << '"';
+            write_escaped_string(s.get());
+            os << '"';
+        }
 
         void visit(const tag_list& l) override
         {
@@ -198,6 +202,29 @@ namespace //anonymous
         {
             os << "null";
         }
+
+        void write_escaped_string(const std::string& str)
+        {
+            for (char c : str) {
+                switch (c) {
+                    case '"': os << "\\\""; break;
+                    case '\\': os << "\\\\"; break;
+                    case '\b': os << "\\b"; break;
+                    case '\f': os << "\\f"; break;
+                    case '\n': os << "\\n"; break;
+                    case '\r': os << "\\r"; break;
+                    case '\t': os << "\\t"; break;
+                    default:
+                        if (static_cast<unsigned char>(c) < 32 || c == 127) {
+                            // Control characters, escape as \u00XX
+                            os << "\\u00" << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>(static_cast<unsigned char>(c));
+                        } else {
+                            os << c;
+                        }
+                        break;
+                }
+            }
+        }
     };
 }