added files

Cargo.toml

@@ -0,0 +1,17 @@
+[package]
+name = "rust_json_parser"
+version = "0.1.0"
+edition = "2021"
+
+
+[lib]
+name = "mylib"
+crate-type = ["cdylib"]
+
+
+[dependencies]
+serde_json = "1.0"
+
+[profile.release]
+lto = true
+codegen-units = 1

src/lib.rs

@@ -0,0 +1,26 @@
+use serde_json::Value;
+use std::ffi::{CStr, CString};
+use std::os::raw::c_char;
+
+#[no_mangle]
+pub extern "C" fn parse_json(input: *const c_char) -> *mut c_char {
+    let c_str = unsafe {
+        assert!(!input.is_null());
+
+        CStr::from_ptr(input)
+    };
+
+    let input_str = match c_str.to_str() {
+        Ok(str) => str,
+        Err(_) => return CString::new("").unwrap().into_raw(),
+    };
+
+    let result = serde_json::from_str::<Value>(input_str);
+
+    match result {
+        Ok(data) => CString::new(format!("{:?}", data)).unwrap().into_raw(),
+        Err(err) => CString::new(format!("Failed to parse JSON: {}", err))
+            .unwrap()
+            .into_raw(),
+    }
+}