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libio: Update tst-fmemopen2.c
This patch updates tst-fmemopen2 to check for fmemopen with NULL buffer inputs and also refactor the code a bit. The test relies on a POSIX compliant fmemopen implementation. * stdio-common/tst-fmemopen2.c (do_test): Add test for NULL and zero length buffers. * stdio-common/tst-fmemopen.c (do_test): Refactor to use test-skeleton.c.
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Adhemerval Zanella
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Adhemerval Zanella
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Jul 8, 2015
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Original file line number | Diff line number | Diff line change |
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/* fmemopen tests. | ||
Copyright (C) 2015 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/>. */ | ||
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#include <assert.h> | ||
#include <stdio.h> | ||
#include <string.h> | ||
#include <sys/types.h> | ||
#include <errno.h> | ||
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/* Check fmemopen with user provided buffer open for write. */ | ||
static int | ||
do_test (void) | ||
do_test_with_buffer (void) | ||
{ | ||
int result = 0; | ||
char buf[100]; | ||
FILE *fp = fmemopen (buf, sizeof (buf), "w"); | ||
const size_t nbuf = sizeof (buf); | ||
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FILE *fp = fmemopen (buf, nbuf, "w"); | ||
if (fp == NULL) | ||
{ | ||
puts ("fmemopen failed"); | ||
return 0; | ||
printf ("FAIL: fmemopen failedi (%s)\n", __FUNCTION__); | ||
return 1; | ||
} | ||
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/* Default write operation, check if file position is correct after it. */ | ||
static const char str[] = "hello world"; | ||
#define nstr (sizeof (str) - 1) | ||
const size_t nstr = sizeof (str) - 1; | ||
fputs (str, fp); | ||
off_t o = ftello (fp); | ||
if (o != nstr) | ||
{ | ||
printf ("first ftello returned %jd, expected %zu\n", | ||
(intmax_t) o, nstr); | ||
printf ("FAIL: first ftello returned %jd, expected %zu\n", | ||
(intmax_t)o, nstr); | ||
result = 1; | ||
} | ||
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/* 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 ("second ftello returned %jd, expected 0\n", (intmax_t) o); | ||
printf ("FAIL: second ftello returned %jd, expected 0\n", | ||
(intmax_t)o); | ||
result = 1; | ||
} | ||
if (fseeko (fp, 0, SEEK_END) != 0) | ||
{ | ||
puts ("fseeko failed"); | ||
return 1; | ||
printf ("FAIL: fseeko failed\n"); | ||
result = 1; | ||
} | ||
o = ftello (fp); | ||
if (o != nstr) | ||
{ | ||
printf ("third ftello returned %jd, expected %zu\n", | ||
(intmax_t) o, nstr); | ||
printf ("FAIL: third ftello returned %jd, expected %zu\n", | ||
(intmax_t)o, nbuf); | ||
result = 1; | ||
} | ||
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/* Rewind the stream and recheck by using a shorter string. */ | ||
rewind (fp); | ||
static const char str2[] = "just hello"; | ||
#define nstr2 (sizeof (str2) - 1) | ||
const size_t nstr2 = sizeof (str2) - 1; | ||
assert (nstr2 < nstr); | ||
fputs (str2, fp); | ||
o = ftello (fp); | ||
if (o != nstr2) | ||
{ | ||
printf ("fourth ftello returned %jd, expected %zu\n", | ||
(intmax_t) o, nstr2); | ||
printf ("FAIL: fourth ftello returned %jd, expected %zu\n", | ||
(intmax_t)o, nstr2); | ||
result = 1; | ||
} | ||
fclose (fp); | ||
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/* Again, but now with a larger string. */ | ||
static const char str3[] = "just hellod"; | ||
if (strcmp (buf, str3) != 0) | ||
{ | ||
printf ("final string is \"%s\", expected \"%s\"\n", | ||
printf ("FAIL: final string is \"%s\", expected \"%s\"\n", | ||
buf, str3); | ||
result = 1; | ||
} | ||
return result; | ||
} | ||
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/* Check fmemopen without user provided buffer open for write. */ | ||
static int | ||
do_test_without_buffer (void) | ||
{ | ||
int result = 0; | ||
const size_t nbuf = 100; | ||
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FILE *fp = fmemopen (NULL, nbuf, "w"); | ||
if (fp == NULL) | ||
{ | ||
printf ("FAIL: fmemopen failed (%s)\n", __FUNCTION__); | ||
return 1; | ||
} | ||
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static const char str[] = "hello world"; | ||
const size_t nstr = sizeof (str) - 1; | ||
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/* 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 %ld, expected %zu\n", 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 %ld, expected %zu\n", o, nbuf); | ||
result = 1; | ||
} | ||
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/* 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 %ld, expected %zu\n", o, nstr2); | ||
result = 1; | ||
} | ||
fclose (fp); | ||
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return result; | ||
} | ||
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/* 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; | ||
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fp = fmemopen (buf, nbuf, "r"); | ||
if (fp == NULL) | ||
{ | ||
printf ("FAIL: fmemopen failed (%s)\n", __FUNCTION__); | ||
return 1; | ||
} | ||
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/* 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 %ld, expected 0\n", o); | ||
result = 1; | ||
} | ||
fclose (fp); | ||
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/* 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; | ||
} | ||
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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; | ||
} | ||
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fclose (fp); | ||
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if (strcmp (buf, BUFCONTENTS) != 0) | ||
{ | ||
printf ("FAIL: strcmp (%s, %s) failed\n", buf, BUFCONTENTS); | ||
return 1; | ||
} | ||
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/* 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; | ||
} | ||
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fclose (fp); | ||
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if (strcmp (buf, "") != 0) | ||
{ | ||
printf ("FAIL: strcmp (%s, \"\") failed\n", buf); | ||
return 1; | ||
} | ||
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return result; | ||
} | ||
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static int | ||
do_test (void) | ||
{ | ||
int ret = 0; | ||
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ret += do_test_with_buffer (); | ||
ret += do_test_without_buffer (); | ||
ret += do_test_length_zero (); | ||
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return ret; | ||
} | ||
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#define TEST_FUNCTION do_test () | ||
#include "../test-skeleton.c" |