79 lines
2.0 KiB
C
79 lines
2.0 KiB
C
|
/* Test of ftello() function.
|
||
|
|
Copyright (C) 2007-2021 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/>. */
|
||
|
|
|
||
|
|
#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 <string.h>
|
||
|
|
|
||
|
|
#include "macros.h"
|
||
|
|
|
||
|
|
#define TESTFILE "t-ftello3.tmp"
|
||
|
|
|
||
|
|
int
|
||
|
|
main (void)
|
||
|
|
{
|
||
|
|
FILE *fp;
|
||
|
|
|
||
|
|
/* Create a file with some contents. */
|
||
|
|
fp = fopen (TESTFILE, "w");
|
||
|
|
if (fp == NULL)
|
||
|
|
goto skip;
|
||
|
|
if (fwrite ("foogarsh", 1, 8, fp) < 8)
|
||
|
|
goto skip;
|
||
|
|
if (fclose (fp))
|
||
|
|
goto skip;
|
||
|
|
|
||
|
|
/* The file's contents is now "foogarsh". */
|
||
|
|
|
||
|
|
/* Try writing after reading to EOF. */
|
||
|
|
fp = fopen (TESTFILE, "r+");
|
||
|
|
if (fp == NULL)
|
||
|
|
goto skip;
|
||
|
|
if (fseek (fp, -1, SEEK_END))
|
||
|
|
goto skip;
|
||
|
|
ASSERT (getc (fp) == 'h');
|
||
|
|
ASSERT (getc (fp) == EOF);
|
||
|
|
ASSERT (ftello (fp) == 8);
|
||
|
|
ASSERT (ftello (fp) == 8);
|
||
|
|
ASSERT (putc ('!', fp) == '!');
|
||
|
|
ASSERT (ftello (fp) == 9);
|
||
|
|
ASSERT (fclose (fp) == 0);
|
||
|
|
fp = fopen (TESTFILE, "r");
|
||
|
|
if (fp == NULL)
|
||
|
|
goto skip;
|
||
|
|
{
|
||
|
|
char buf[10];
|
||
|
|
ASSERT (fread (buf, 1, 10, fp) == 9);
|
||
|
|
ASSERT (memcmp (buf, "foogarsh!", 9) == 0);
|
||
|
|
}
|
||
|
|
ASSERT (fclose (fp) == 0);
|
||
|
|
|
||
|
|
/* The file's contents is now "foogarsh!". */
|
||
|
|
|
||
|
|
remove (TESTFILE);
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
skip:
|
||
|
|
fprintf (stderr, "Skipping test: prerequisite file operations failed.\n");
|
||
|
|
remove (TESTFILE);
|
||
|
|
return 77;
|
||
|
|
}
|