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/* Test of freadseek() function.
Copyright (C) 2007-2023 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>, 2008. */
#include <config.h>
#include "freadseek.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "macros.h"
int
main (int argc, char **argv)
{
static const char stdin_contents[] =
"#!/bin/sh\n\n${CHECKER} ./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 < \"$srcdir/test-freadseek.sh\" || exit 1\ncat \"$srcdir/test-freadseek.sh\" | ${CHECKER} ./test-freadseek${EXEEXT} 5 19 6 7 18 9 19 || exit 1\nexit 0\n";
int nbytes1 = atoi (argv[1]);
int nbytes2 = atoi (argv[2]);
int nbytes3 = atoi (argv[3]);
int nbytes4 = atoi (argv[4]);
int nbytes5 = atoi (argv[5]);
int nbytes6 = atoi (argv[6]);
int nbytes7 = atoi (argv[7]);
void *buf1 = malloc (nbytes1);
void *buf3 = malloc (nbytes3);
void *buf5 = malloc (nbytes5);
void *buf7 = malloc (nbytes7);
/* A private variable to keep track of the position. */
size_t position = 0;
ASSERT (fread (buf1, 1, nbytes1, stdin) == nbytes1);
ASSERT (memcmp (buf1, stdin_contents + position, nbytes1) == 0);
position += nbytes1;
/* Test normal behaviour. */
ASSERT (freadseek (stdin, nbytes2) == 0);
position += nbytes2;
ASSERT (fread (buf3, 1, nbytes3, stdin) == nbytes3);
ASSERT (memcmp (buf3, stdin_contents + position, nbytes3) == 0);
position += nbytes3;
/* Test behaviour after normal ungetc. */
ungetc (fgetc (stdin), stdin);
ASSERT (freadseek (stdin, nbytes4) == 0);
position += nbytes4;
ASSERT (fread (buf5, 1, nbytes5, stdin) == nbytes5);
ASSERT (memcmp (buf5, stdin_contents + position, nbytes5) == 0);
position += nbytes5;
/* Test behaviour after arbitrary ungetc. */
fgetc (stdin);
ungetc ('@', stdin);
ASSERT (freadseek (stdin, nbytes6) == 0);
position += nbytes6;
ASSERT (fread (buf7, 1, nbytes7, stdin) == nbytes7);
ASSERT (memcmp (buf7, stdin_contents + position, nbytes7) == 0);
position += nbytes7;
/* Test move to end of file. */
ASSERT (freadseek (stdin, strlen (stdin_contents) - position) == 0);
ASSERT (fgetc (stdin) == EOF);
ASSERT (!ferror (stdin));
#if !defined __MINT__ /* FreeMiNT has problems seeking past end of file */
/* Test move beyond end of file. */
ASSERT (freadseek (stdin, 1000000) == 0);
ASSERT (fgetc (stdin) == EOF);
ASSERT (!ferror (stdin));
#endif
free (buf7);
free (buf5);
free (buf3);
free (buf1);
return 0;
}
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