Mercurial > gnulib
view tests/test-fseeko.c @ 40086:d6de7c427079
stdopen: modernize and simplify
* lib/stdopen.c: Update copyright date
Do not include sys/types.h; no longer needed these days.
(stdopen): Use C99-style decl in loop. Return int errno
value, rather than just a bool. Do not worry about fd mismatches,
since the caller cares only if 0, 1, 2 are occupied.
* lib/stdopen.h: No need to include <stdbool.h>.
* m4/stdopen.m4: Remove.
* modules/stdopen: New file.
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Sat, 05 Jan 2019 18:02:32 -0800 |
parents | b06060465f09 |
children |
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/* Test of fseeko() function. Copyright (C) 2007-2019 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 (fseeko, int, (FILE *, off_t, int)); #include "macros.h" #ifndef FUNC_UNGETC_BROKEN # define FUNC_UNGETC_BROKEN 0 #endif int main (int argc, char **argv _GL_UNUSED) { /* Assume stdin is non-empty, seekable, and starts with '#!/bin/sh' iff argc > 1. */ int expected = argc > 1 ? 0 : -1; /* Exit with success only if fseek/fseeko agree. */ int r1 = fseeko (stdin, 0, SEEK_CUR); int r2 = fseek (stdin, 0, SEEK_CUR); ASSERT (r1 == r2 && r1 == expected); if (argc > 1) { /* Test that fseek discards previously read ungetc data. */ int ch = fgetc (stdin); ASSERT (ch == '#'); ASSERT (ungetc (ch, stdin) == ch); ASSERT (fseeko (stdin, 2, SEEK_SET) == 0); ch = fgetc (stdin); ASSERT (ch == '/'); if (2 < argc) { if (FUNC_UNGETC_BROKEN) { fputs ("Skipping test: ungetc cannot handle arbitrary bytes\n", stderr); return 77; } /* Test that fseek discards random ungetc data. */ ASSERT (ungetc (ch ^ 0xff, stdin) == (ch ^ 0xff)); } ASSERT (fseeko (stdin, 0, SEEK_END) == 0); ASSERT (fgetc (stdin) == EOF); /* Test that fseek resets end-of-file marker. */ ASSERT (feof (stdin)); ASSERT (fseeko (stdin, 0, SEEK_END) == 0); ASSERT (!feof (stdin)); } return 0; }