Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
glibc/stdio-common/tst-fmemopen2.c
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
261 lines (229 sloc)
6.23 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
/* fmemopen tests. | |
Copyright (C) 2015-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <assert.h> | |
#include <stdio.h> | |
#include <string.h> | |
#include <sys/types.h> | |
#include <errno.h> | |
/* Check fmemopen with user provided buffer open for write. */ | |
static int | |
do_test_with_buffer (void) | |
{ | |
int result = 0; | |
char buf[100]; | |
const size_t nbuf = sizeof (buf); | |
FILE *fp = fmemopen (buf, nbuf, "w"); | |
if (fp == NULL) | |
{ | |
printf ("FAIL: fmemopen failed (%s)\n", __FUNCTION__); | |
return 1; | |
} | |
/* Default write operation, check if file position is correct after it. */ | |
static const char str[] = "hello world"; | |
const size_t nstr = sizeof (str) - 1; | |
fputs (str, fp); | |
off_t o = ftello (fp); | |
if (o != nstr) | |
{ | |
printf ("FAIL: first ftello returned %jd, expected %zu\n", | |
(intmax_t)o, nstr); | |
result = 1; | |
} | |
/* Rewind stream and seek tests, the position size should be equal to | |
buffer size provided in open function. */ | |
rewind (fp); | |
o = ftello (fp); | |
if (o != 0) | |
{ | |
printf ("FAIL: second ftello returned %jd, expected 0\n", | |
(intmax_t)o); | |
result = 1; | |
} | |
if (fseeko (fp, 0, SEEK_END) != 0) | |
{ | |
printf ("FAIL: fseeko failed\n"); | |
result = 1; | |
} | |
o = ftello (fp); | |
if (o != nstr) | |
{ | |
printf ("FAIL: third ftello returned %jd, expected %zu\n", | |
(intmax_t)o, nstr); | |
result = 1; | |
} | |
/* Rewind the stream and recheck by using a shorter string. */ | |
rewind (fp); | |
static const char str2[] = "just hello"; | |
const size_t nstr2 = sizeof (str2) - 1; | |
assert (nstr2 < nstr); | |
fputs (str2, fp); | |
o = ftello (fp); | |
if (o != nstr2) | |
{ | |
printf ("FAIL: fourth ftello returned %jd, expected %zu\n", | |
(intmax_t)o, nstr2); | |
result = 1; | |
} | |
fclose (fp); | |
/* Again, but now with a larger string. */ | |
static const char str3[] = "just hellod"; | |
if (strcmp (buf, str3) != 0) | |
{ | |
printf ("FAIL: final string is \"%s\", expected \"%s\"\n", | |
buf, str3); | |
result = 1; | |
} | |
return result; | |
} | |
/* Check fmemopen without user provided buffer open for write. */ | |
static int | |
do_test_without_buffer (void) | |
{ | |
int result = 0; | |
const size_t nbuf = 100; | |
FILE *fp = fmemopen (NULL, nbuf, "w"); | |
if (fp == NULL) | |
{ | |
printf ("FAIL: fmemopen failed (%s)\n", __FUNCTION__); | |
return 1; | |
} | |
static const char str[] = "hello world"; | |
const size_t nstr = sizeof (str) - 1; | |
/* Default write operation, check if file position is correct after it. */ | |
fputs (str, fp); | |
off_t o = ftello (fp); | |
if (o != nstr) | |
{ | |
printf ("FAIL: first ftello returned %jd, expected %zu\n", | |
(intmax_t) o, nstr); | |
result = 1; | |
} | |
if (fseeko (fp, 0, SEEK_END) != 0) | |
{ | |
printf ("FAIL: fseeko failed\n"); | |
result = 1; | |
} | |
o = ftello (fp); | |
if (o != nstr) | |
{ | |
printf ("FAIL: second ftello returned %jd, expected %zu\n", | |
(intmax_t) o, nbuf); | |
result = 1; | |
} | |
/* Rewind the stream and recheck by using a shorter string. */ | |
rewind (fp); | |
static const char str2[] = "just hello"; | |
const size_t nstr2 = sizeof (str2) - 1; | |
assert (nstr2 < nstr); | |
fputs (str2, fp); | |
o = ftello (fp); | |
if (o != nstr2) | |
{ | |
printf ("FAIL: third ftello returned %jd, expected %zu\n", | |
(intmax_t) o, nstr2); | |
result = 1; | |
} | |
fclose (fp); | |
return result; | |
} | |
/* Check fmemopen with a buffer lenght of zero. */ | |
static int | |
do_test_length_zero (void) | |
{ | |
int result = 0; | |
FILE *fp; | |
#define BUFCONTENTS "testing buffer" | |
char buf[100] = BUFCONTENTS; | |
const size_t nbuf = 0; | |
int r; | |
fp = fmemopen (buf, nbuf, "r"); | |
if (fp == NULL) | |
{ | |
printf ("FAIL: fmemopen failed (%s)\n", __FUNCTION__); | |
return 1; | |
} | |
/* Reading any data on a zero-length buffer should return EOF. */ | |
if ((r = fgetc (fp)) != EOF) | |
{ | |
printf ("FAIL: fgetc on a zero-length returned: %d\n", r); | |
result = 1; | |
} | |
off_t o = ftello (fp); | |
if (o != 0) | |
{ | |
printf ("FAIL: first ftello returned %jd, expected 0\n", | |
(intmax_t) o); | |
result = 1; | |
} | |
fclose (fp); | |
/* Writing any data shall start at current position and shall not pass | |
current buffer size beyond the size in fmemopen call. */ | |
fp = fmemopen (buf, nbuf, "w"); | |
if (fp == NULL) | |
{ | |
printf ("FAIL: second fmemopen failed (%s)\n", __FUNCTION__); | |
return 1; | |
} | |
static const char str[] = "hello world"; | |
/* Because of buffering, the fputs call itself will not fail. However the | |
final buffer should be not changed because length 0 was passed to the | |
fmemopen call. */ | |
fputs (str, fp); | |
r = 0; | |
errno = 0; | |
if (fflush (fp) != EOF) | |
{ | |
printf ("FAIL: fflush did not return EOF\n"); | |
fclose (fp); | |
return 1; | |
} | |
if (errno != ENOSPC) | |
{ | |
printf ("FAIL: errno is %i (expected ENOSPC)\n", errno); | |
fclose (fp); | |
return 1; | |
} | |
fclose (fp); | |
if (strcmp (buf, BUFCONTENTS) != 0) | |
{ | |
printf ("FAIL: strcmp (%s, %s) failed\n", buf, BUFCONTENTS); | |
return 1; | |
} | |
/* Different than 'w' mode, 'w+' truncates the buffer. */ | |
fp = fmemopen (buf, nbuf, "w+"); | |
if (fp == NULL) | |
{ | |
printf ("FAIL: third fmemopen failed (%s)\n", __FUNCTION__); | |
return 1; | |
} | |
fclose (fp); | |
if (strcmp (buf, "") != 0) | |
{ | |
printf ("FAIL: strcmp (%s, \"\") failed\n", buf); | |
return 1; | |
} | |
return result; | |
} | |
static int | |
do_test (void) | |
{ | |
int ret = 0; | |
ret += do_test_with_buffer (); | |
ret += do_test_without_buffer (); | |
ret += do_test_length_zero (); | |
return ret; | |
} | |
#define TEST_FUNCTION do_test () | |
#include "../test-skeleton.c" |