1570af302Sopenharmony_ci/* 2570af302Sopenharmony_ci * Copyright (c) 2022 Huawei Device Co., Ltd. 3570af302Sopenharmony_ci * Licensed under the Apache License, Version 2.0 (the "License"); 4570af302Sopenharmony_ci * you may not use this file except in compliance with the License. 5570af302Sopenharmony_ci * You may obtain a copy of the License at 6570af302Sopenharmony_ci * 7570af302Sopenharmony_ci * http://www.apache.org/licenses/LICENSE-2.0 8570af302Sopenharmony_ci * 9570af302Sopenharmony_ci * Unless required by applicable law or agreed to in writing, software 10570af302Sopenharmony_ci * distributed under the License is distributed on an "AS IS" BASIS, 11570af302Sopenharmony_ci * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12570af302Sopenharmony_ci * See the License for the specific language governing permissions and 13570af302Sopenharmony_ci * limitations under the License. 14570af302Sopenharmony_ci */ 15570af302Sopenharmony_ci 16570af302Sopenharmony_ci#include <stdio_ext.h> 17570af302Sopenharmony_ci#include "functionalext.h" 18570af302Sopenharmony_ci 19570af302Sopenharmony_ci/** 20570af302Sopenharmony_ci * @tc.name : __fpurge_0100 21570af302Sopenharmony_ci * @tc.desc : Each parameter value is valid and can be used to completely clear the data in the buffer. 22570af302Sopenharmony_ci * @tc.level : Level 0 23570af302Sopenharmony_ci */ 24570af302Sopenharmony_civoid __fpurge_0100() 25570af302Sopenharmony_ci{ 26570af302Sopenharmony_ci char buf[100]; 27570af302Sopenharmony_ci char *str = "This is a test"; 28570af302Sopenharmony_ci FILE *fp = fopen("/data/fpurge.txt", "w"); 29570af302Sopenharmony_ci EXPECT_PTRNE("__fpurge_0100", fp, NULL); 30570af302Sopenharmony_ci 31570af302Sopenharmony_ci fputs(str, fp); 32570af302Sopenharmony_ci size_t ret = __fpurge(fp); 33570af302Sopenharmony_ci fgets(buf, 100, fp); 34570af302Sopenharmony_ci EXPECT_EQ("__fpurge_0100", strstr(buf, str), 0); 35570af302Sopenharmony_ci EXPECT_EQ("__fpurge_0100", ret, 0); 36570af302Sopenharmony_ci 37570af302Sopenharmony_ci fclose(fp); 38570af302Sopenharmony_ci remove("/data/fpurge.txt"); 39570af302Sopenharmony_ci} 40570af302Sopenharmony_ci 41570af302Sopenharmony_ciint main(int argc, char *argv[]) 42570af302Sopenharmony_ci{ 43570af302Sopenharmony_ci __fpurge_0100(); 44570af302Sopenharmony_ci return t_status; 45570af302Sopenharmony_ci}