fix(src): move get version function on C side

Author: Gioee

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "mcp-ffi"
-version = "0.1.0"
+version = "0.1.4"
 edition = "2021"
 
 [dependencies]

src/lib.rs

@@ -40,17 +40,6 @@ pub extern "C" fn mcp_init() -> i32 {
     0
 }
 
-/// Get the version string of the MCP library
-/// Returns a null-terminated string that must be freed with mcp_free_string
-#[no_mangle]
-pub extern "C" fn mcp_get_version() -> *mut c_char {
-    let version = env!("CARGO_PKG_VERSION");
-    match CString::new(version) {
-        Ok(c_str) => c_str.into_raw(),
-        Err(_) => ptr::null_mut(),
-    }
-}
-
 /// Free a string allocated by the MCP library
 #[no_mangle]
 pub extern "C" fn mcp_free_string(s: *mut c_char) {

src/mcp_ffi.h

@@ -23,12 +23,6 @@ typedef struct McpClient McpClient;
  */
 int32_t mcp_init(void);
 
-/**
- * Get the version string of the MCP library
- * Returns a null-terminated string that must be freed with mcp_free_string
- */
-char* mcp_get_version(void);
-
 /**
  * Free a string allocated by the MCP library
  */

src/sqlite-mcp.c

@@ -39,13 +39,7 @@ static void mcp_version_func(
   int argc,
   sqlite3_value **argv
 ){
-  char *version = mcp_get_version();
-  if (version) {
-    sqlite3_result_text(context, version, -1, SQLITE_TRANSIENT);
-    mcp_free_string(version);
-  } else {
-    sqlite3_result_error(context, "Failed to get MCP version", -1);
-  }
+  sqlite3_result_text(context, SQLITE_MCP_VERSION, -1, NULL);
 }
 
 /*