feat: add libsql_connection_info

libsql.h

@@ -113,6 +113,12 @@ typedef struct {
     libsql_error_t *err;
 } libsql_execute_t;
 
+typedef struct {
+    int64_t last_inserted_rowid;
+    uint64_t total_changes;
+    libsql_error_t *err;
+} libsql_connection_info_t;
+
 /**
  * Database description.
  */
@@ -161,6 +167,10 @@ libsql_transaction_t libsql_connection_transaction(libsql_connection_t self);
 libsql_batch_t
 libsql_connection_batch(libsql_connection_t self, const char *sql);
 
+/** Send a batch statement in a connection */
+libsql_connection_info_t
+libsql_connection_info(libsql_connection_t self);
+
 /** Send a batch statement in a transaction */
 libsql_batch_t
 libsql_transaction_batch(libsql_transaction_t self, const char *sql);

src/lib.rs

@@ -455,14 +455,39 @@ pub extern "C" fn libsql_connection_batch(
     }
 }
 
+#[no_mangle]
+pub extern "C" fn libsql_connection_info(
+    conn: c::libsql_connection_t,
+) -> c::libsql_connection_info_t {
+    match (move || -> anyhow::Result<(i64, u64)> {
+        if conn.inner.is_null() {
+            bail!("attempted to get info from a null connection")
+        }
+
+        let conn = ManuallyDrop::new(unsafe { Box::from_raw(conn.inner as *mut Connection) });
+
+        Ok((conn.last_insert_rowid(), conn.total_changes()))
+    })() {
+        Ok((last_inserted_rowid, total_changes)) => c::libsql_connection_info_t {
+            last_inserted_rowid,
+            total_changes,
+            ..Default::default()
+        },
+        Err(err) => c::libsql_connection_info_t {
+            err: CString::new(err.to_string()).unwrap().into_raw() as *mut c::libsql_error_t,
+            ..Default::default()
+        },
+    }
+}
+
 #[no_mangle]
 pub extern "C" fn libsql_transaction_batch(
     tx: c::libsql_transaction_t,
     sql: *const c_char,
 ) -> c::libsql_batch_t {
     match (move || -> anyhow::Result<_> {
         if tx.inner.is_null() {
-            bail!("attempted to init a statement with a null connection")
+            bail!("attempted execute batch statements with a null transaction")
         }
 
         if sql.is_null() {