lib/sqlite3: use only NativeString in the native layer

[nit.git] / lib / sqlite3 / native_sqlite3.nit

diff --git a/lib/sqlite3/native_sqlite3.nit b/lib/sqlite3/native_sqlite3.nit
index f441545..f9ea7e4 100644 (file)
--- a/lib/sqlite3/native_sqlite3.nit
+++ b/lib/sqlite3/native_sqlite3.nit
@@ -75,11 +75,10 @@ extern class Sqlite3Code `{int`}
 
        private fun native_to_s: NativeString `{
 #if SQLITE_VERSION_NUMBER >= 3007015
-               char *err = (char *)sqlite3_errstr(self);
+               return (char *)sqlite3_errstr(self);
 #else
-               char *err = "sqlite3_errstr supported only by version >= 3.7.15";
+               return "sqlite3_errstr is not supported in version < 3.7.15";
 #endif
-               return err;
        `}
 end
 
@@ -91,13 +90,8 @@ extern class NativeStatement `{sqlite3_stmt*`}
                return sqlite3_step(self);
        `}
 
-       fun column_name(i: Int) : String import NativeString.to_s `{
-               const char * name = (sqlite3_column_name(self, i));
-               if(name == NULL){
-                       name = "";
-               }
-               char * ret = (char *) name;
-               return NativeString_to_s(ret);
+       fun column_name(i: Int): NativeString `{
+               return (char *)sqlite3_column_name(self, i);
        `}
 
        # Number of bytes in the blob or string at row `i`
@@ -171,18 +165,18 @@ extern class NativeSqlite3 `{sqlite3 *`}
        `}
 
        # Execute a SQL statement
-       fun exec(sql: String): Sqlite3Code import String.to_cstring `{
-               return sqlite3_exec(self, String_to_cstring(sql), 0, 0, 0);
+       fun exec(sql: NativeString): Sqlite3Code `{
+               return sqlite3_exec(self, sql, NULL, NULL, NULL);
        `}
 
        # Prepare a SQL statement
-       fun prepare(sql: String): nullable NativeStatement import String.to_cstring, NativeStatement.as nullable `{
+       fun prepare(sql: NativeString): NativeStatement `{
                sqlite3_stmt *stmt;
-               int res = sqlite3_prepare_v2(self, String_to_cstring(sql), -1, &stmt, 0);
+               int res = sqlite3_prepare_v2(self, sql, -1, &stmt, 0);
                if (res == SQLITE_OK)
-                       return NativeStatement_as_nullable(stmt);
+                       return stmt;
                else
-                       return null_NativeStatement();
+                       return NULL;
        `}
 
        fun last_insert_rowid: Int `{