mirror of
https://https.git.savannah.gnu.org/git/gnulib.git
synced 2026-04-28 06:33:36 +00:00
b2a583ead5
Done through
sed -e 's/memcmp \([(][^()]*[)]\) == 0/memeq \1/g' \
-e 's/memcmp \([(][^()]*[(][^()]*[)][^()]*[)]\) == 0/memeq \1/g'
* tests/**/*.[hc]: Use memeq instead of memcmp ... == 0.
* modules/*-tests (Dependencies): Add memeq.
87 lines
2.3 KiB
C
87 lines
2.3 KiB
C
/* Test of fseeko() function on large files.
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Copyright (C) 2024-2026 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2024. */
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#include <config.h>
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/* Specification. */
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <unistd.h>
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#include "macros.h"
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#define TESTFILE "test-fseeko.data"
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#define TESTFILE_ZEROES 3000000000LL
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#define TESTFILE_DATA "GNU"
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#define TESTFILE_DATA_LEN 3
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int
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main (void)
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{
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remove (TESTFILE);
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if (sizeof (off_t) <= 4)
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{
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fprintf (stderr, "off_t is only 32 bits.\n");
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return 77;
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}
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/* off_t is larger than 32-bit. */
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/* Create a file that is larger than 2 GiB.
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On file systems such as ext2, the file will have "holes" and thus
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not consume much disk space. */
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{
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int fd = open (TESTFILE, O_CREAT | O_TRUNC | O_RDWR, 0600);
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ASSERT (fd >= 0);
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if (ftruncate (fd, TESTFILE_ZEROES) < 0
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|| lseek (fd, TESTFILE_ZEROES, SEEK_SET) < 0
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|| write (fd, TESTFILE_DATA, TESTFILE_DATA_LEN) < 0
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|| fsync (fd) < 0)
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{
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close (fd);
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remove (TESTFILE);
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fprintf (stderr, "Could not create 3 GB large file.\n");
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return 77;
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}
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close (fd);
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}
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/* Check that fseeko() works. */
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{
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FILE *fp = fopen (TESTFILE, "r");
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ASSERT (fp != NULL);
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int ret;
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ret = fseeko (fp, TESTFILE_ZEROES, SEEK_SET);
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ASSERT (ret == 0);
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char buf[TESTFILE_DATA_LEN];
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ASSERT (fread (buf, 1, TESTFILE_DATA_LEN, fp) == TESTFILE_DATA_LEN);
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ASSERT (memeq (buf, TESTFILE_DATA, TESTFILE_DATA_LEN));
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ret = fclose (fp);
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ASSERT (ret == 0);
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}
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remove (TESTFILE);
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return test_exit_status;
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}
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