| /* Test of ftello() function. |
| Copyright (C) 2007-2020 Free Software Foundation, Inc. |
| |
| This program is free software: you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <https://www.gnu.org/licenses/>. */ |
| |
| /* Written by Bruno Haible <bruno@clisp.org>, 2007. */ |
| |
| #include <config.h> |
| |
| /* None of the files accessed by this test are large, so disable the |
| fseek link warning if we are not using the gnulib fseek module. */ |
| #define _GL_NO_LARGE_FILES |
| #include <stdio.h> |
| |
| #include "signature.h" |
| SIGNATURE_CHECK (ftello, off_t, (FILE *)); |
| |
| #include "binary-io.h" |
| #include "macros.h" |
| |
| #ifndef FUNC_UNGETC_BROKEN |
| # define FUNC_UNGETC_BROKEN 0 |
| #endif |
| |
| int |
| main (int argc, char **argv _GL_UNUSED) |
| { |
| int ch; |
| /* Assume stdin is seekable iff argc > 1. */ |
| if (argc == 1) |
| { |
| ASSERT (ftell (stdin) == -1); |
| ASSERT (ftello (stdin) == -1); |
| return 0; |
| } |
| |
| /* mingw ftell is unreliable on text mode input. */ |
| set_binary_mode (0, O_BINARY); |
| |
| /* Simple tests. For each test, make sure ftell and ftello agree. */ |
| ASSERT (ftell (stdin) == 0); |
| ASSERT (ftello (stdin) == 0); |
| |
| ch = fgetc (stdin); |
| ASSERT (ch == '#'); |
| ASSERT (ftell (stdin) == 1); |
| ASSERT (ftello (stdin) == 1); |
| |
| /* Test ftell after ungetc of read input. */ |
| ch = ungetc ('#', stdin); |
| ASSERT (ch == '#'); |
| ASSERT (ftell (stdin) == 0); |
| ASSERT (ftello (stdin) == 0); |
| |
| ch = fgetc (stdin); |
| ASSERT (ch == '#'); |
| ASSERT (ftell (stdin) == 1); |
| ASSERT (ftello (stdin) == 1); |
| |
| /* Test ftell after fseek. */ |
| ASSERT (fseek (stdin, 2, SEEK_SET) == 0); |
| ASSERT (ftell (stdin) == 2); |
| ASSERT (ftello (stdin) == 2); |
| |
| /* Test ftell after random ungetc. */ |
| ch = fgetc (stdin); |
| ASSERT (ch == '/'); |
| ch = ungetc ('@', stdin); |
| ASSERT (ch == '@'); |
| ASSERT (ftell (stdin) == 2); |
| ASSERT (ftello (stdin) == 2); |
| |
| ch = fgetc (stdin); |
| ASSERT (ch == '@'); |
| ASSERT (ftell (stdin) == 3); |
| ASSERT (ftello (stdin) == 3); |
| |
| if (2 < argc) |
| { |
| if (FUNC_UNGETC_BROKEN) |
| { |
| fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n", |
| stderr); |
| return 77; |
| } |
| /* Test ftell after ungetc without read. */ |
| ASSERT (fseek (stdin, 0, SEEK_CUR) == 0); |
| ASSERT (ftell (stdin) == 3); |
| ASSERT (ftello (stdin) == 3); |
| |
| ch = ungetc ('~', stdin); |
| ASSERT (ch == '~'); |
| ASSERT (ftell (stdin) == 2); |
| ASSERT (ftello (stdin) == 2); |
| } |
| |
| #if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */ |
| /* Test ftell beyond end of file. */ |
| ASSERT (fseek (stdin, 0, SEEK_END) == 0); |
| ch = ftello (stdin); |
| ASSERT (fseek (stdin, 10, SEEK_END) == 0); |
| ASSERT (ftell (stdin) == ch + 10); |
| ASSERT (ftello (stdin) == ch + 10); |
| #endif |
| |
| return 0; |
| } |