c: add replicated data for sync

bindings/c/include/libsql.h

@@ -27,6 +27,11 @@ typedef struct libsql_stmt libsql_stmt;
 
 typedef const libsql_database *libsql_database_t;
 
+typedef struct {
+  int frame_no;
+  int frames_synced;
+} replicated;
+
 typedef struct {
   const char *db_path;
   const char *primary_url;
@@ -58,6 +63,8 @@ extern "C" {
 
 int libsql_sync(libsql_database_t db, const char **out_err_msg);
 
+int libsql_sync2(libsql_database_t db, replicated *out_replicated, const char **out_err_msg);
+
 int libsql_open_sync(const char *db_path,
                      const char *primary_url,
                      const char *auth_token,

bindings/c/src/lib.rs

@@ -11,7 +11,7 @@ use tokio::runtime::Runtime;
 use types::{
     blob, libsql_connection, libsql_connection_t, libsql_database, libsql_database_t, libsql_row,
     libsql_row_t, libsql_rows, libsql_rows_future_t, libsql_rows_t, libsql_stmt, libsql_stmt_t,
-    stmt,
+    replicated, stmt,
 };
 
 lazy_static! {
@@ -46,6 +46,26 @@ pub unsafe extern "C" fn libsql_sync(
     }
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn libsql_sync2(
+    db: libsql_database_t,
+    out_replicated: *mut replicated,
+    out_err_msg: *mut *const std::ffi::c_char,
+) -> std::ffi::c_int {
+    let db = db.get_ref();
+    match RT.block_on(db.sync()) {
+        Ok(replicated) => {
+            (*out_replicated).frame_no = replicated.frame_no().unwrap_or(0) as i32;
+            (*out_replicated).frames_synced = replicated.frames_synced() as i32;
+            0
+        }
+        Err(e) => {
+            set_err_msg(format!("Error syncing database: {e}"), out_err_msg);
+            1
+        }
+    }
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn libsql_open_sync(
     db_path: *const std::ffi::c_char,

bindings/c/src/types.rs

@@ -115,6 +115,12 @@ impl From<&mut libsql_connection> for libsql_connection_t {
     }
 }
 
+#[repr(C)]
+pub struct replicated {
+    pub frame_no: std::ffi::c_int,
+    pub frames_synced: std::ffi::c_int,
+}
+
 pub struct stmt {
     pub stmt: libsql::Statement,
     pub params: Vec<libsql::Value>,