add Db::set_errpfx. closes #272

git-svn-id: file:///svn/tokudb@1654 c7de825b-a66e-492c-adef-691d508d4ae1

cxx/db.cpp

@@ -167,6 +167,10 @@ int Db::associate(DbTxn *txnid, Db *secondary, int (*callback)(Db *secondary, co
     return the_Env->maybe_throw_error(ret);
 }
 
+void Db::set_errpfx(const char *errpfx) {
+    the_Env->set_errpfx(errpfx);
+}
+
 void Db::set_error_stream(std::ostream *new_error_stream) {
     the_Env->set_error_stream(new_error_stream);
 }

cxx/tests/test_error_stream.cpp

@@ -13,13 +13,15 @@ int test_error_stream(const char *dbfile) {
     r = creat(dbfile, 0777); assert(r >= 0); close(r);
 
     DbEnv env(DB_CXX_NO_EXCEPTIONS);
-    env.set_errpfx("my_test_error_stream");
+    env.set_errpfx("my_env_error_stream");
     env.set_error_stream(&std::cerr);
     
     r = env.open(".", DB_INIT_MPOOL + DB_CREATE + DB_PRIVATE, 0777); assert(r == 0);
     r = env.open(".", DB_INIT_MPOOL + DB_CREATE + DB_PRIVATE, 0777); assert(r == EINVAL);
 
     Db db(&env, 0);
+    db.set_errpfx("my_db_error_stream");
+    db.set_error_stream(&std::cerr);
     r = db.open(0, dbfile, 0, DB_BTREE, DB_CREATE, 0777); assert(r != 0);
     r = db.close(0); assert(r == 0);
     r = db.close(0); assert(r == EINVAL);