| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 1991-2015 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. |
| 3 | |
| 4 | The GNU C Library is free software; you can redistribute it and/or |
| 5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either |
| 7 | version 2.1 of the License, or (at your option) any later version. |
| 8 | |
| 9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | Lesser General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, see |
| 16 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <stdio.h> |
| 19 | |
| 20 | #define TESTFILE "/tmp/test.dat" |
| 21 | |
| 22 | static int |
| 23 | do_test (void) |
| 24 | { |
| 25 | FILE *fp; |
| 26 | int i, j; |
| 27 | |
| 28 | puts ("\nFile seek test"); |
| 29 | fp = fopen (TESTFILE, "w"); |
| 30 | if (fp == NULL) |
| 31 | { |
| 32 | perror (TESTFILE); |
| 33 | return 1; |
| 34 | } |
| 35 | |
| 36 | for (i = 0; i < 256; i++) |
| 37 | putc (i, fp); |
| 38 | if (freopen (TESTFILE, "r", fp) != fp) |
| 39 | { |
| 40 | perror ("Cannot open file for reading"); |
| 41 | return 1; |
| 42 | } |
| 43 | |
| 44 | for (i = 1; i <= 255; i++) |
| 45 | { |
| 46 | printf ("%3d\n", i); |
| 47 | fseek (fp, (long) -i, SEEK_END); |
| 48 | if ((j = getc (fp)) != 256 - i) |
| 49 | { |
| 50 | printf ("SEEK_END failed %d\n", j); |
| 51 | break; |
| 52 | } |
| 53 | if (fseek (fp, (long) i, SEEK_SET)) |
| 54 | { |
| 55 | puts ("Cannot SEEK_SET"); |
| 56 | break; |
| 57 | } |
| 58 | if ((j = getc (fp)) != i) |
| 59 | { |
| 60 | printf ("SEEK_SET failed %d\n", j); |
| 61 | break; |
| 62 | } |
| 63 | if (fseek (fp, (long) i, SEEK_SET)) |
| 64 | { |
| 65 | puts ("Cannot SEEK_SET"); |
| 66 | break; |
| 67 | } |
| 68 | if (fseek (fp, (long) (i >= 128 ? -128 : 128), SEEK_CUR)) |
| 69 | { |
| 70 | puts ("Cannot SEEK_CUR"); |
| 71 | break; |
| 72 | } |
| 73 | if ((j = getc (fp)) != (i >= 128 ? i - 128 : i + 128)) |
| 74 | { |
| 75 | printf ("SEEK_CUR failed %d\n", j); |
| 76 | break; |
| 77 | } |
| 78 | } |
| 79 | fclose (fp); |
| 80 | remove (TESTFILE); |
| 81 | |
| 82 | puts ((i > 255) ? "Test succeeded." : "Test FAILED!"); |
| 83 | return (i > 255) ? 0 : 1; |
| 84 | } |
| 85 | |
| 86 | #define TEST_FUNCTION do_test () |
| 87 | #include "../test-skeleton.c" |