1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include <stdio_ext.h>
17 #include "functionalext.h"
18
19 /**
20 * @tc.name : __fbufsize_0100
21 * @tc.desc : Returns the size of the buffer currently used by the given stream
22 * @tc.level : Level 0
23 */
__fbufsize_0100(void)24 void __fbufsize_0100(void)
25 {
26 char buf[1024];
27 FILE *fp = fopen("/proc/version", "r");
28 EXPECT_PTRNE("__fbufsize_0100", fp, NULL);
29
30 int ret = setvbuf(fp, buf, _IOFBF, sizeof buf);
31 EXPECT_NE("__fbufsize_0100", ret, EOF);
32
33 size_t result = __fbufsize(fp);
34 EXPECT_TRUE("__fbufsize_0100", result <= sizeof buf);
35
36 fclose(fp);
37 }
38
39 /**
40 * @tc.name : __fbufsize_0200
41 * @tc.desc : Returns the size of the buffer currently used by the given stream when the file size is 0
42 * @tc.level : Level 0
43 */
__fbufsize_0200(void)44 void __fbufsize_0200(void)
45 {
46 FILE *fp = fopen("/proc/version", "r");
47 EXPECT_PTRNE("__fbufsize_0200", fp, NULL);
48
49 int ret = setvbuf(fp, NULL, _IONBF, 0);
50 EXPECT_NE("__fbufsize_0100", ret, EOF);
51
52 size_t result = __fbufsize(fp);
53 EXPECT_EQ("__fbufsize_0200", result, 0U);
54
55 fclose(fp);
56 }
57
main(int argc,char * argv[])58 int main(int argc, char *argv[])
59 {
60 __fbufsize_0100();
61 __fbufsize_0200();
62 return t_status;
63 }