From patchwork Mon Jun 23 13:20:25 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 1662 Received: (qmail 11771 invoked by alias); 23 Jun 2014 13:20:36 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 11634 invoked by uid 89); 23 Jun 2014 13:20:35 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.6 required=5.0 tests=AWL, BAYES_00, T_RP_MATCHES_RCVD autolearn=ham version=3.3.2 X-HELO: e24smtp05.br.ibm.com Message-ID: <53A82999.3040108@linux.vnet.ibm.com> Date: Mon, 23 Jun 2014 10:20:25 -0300 From: Adhemerval Zanella User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 MIME-Version: 1.0 To: "GNU C. Library" Subject: [PATCH 2/3] libio: Update tst-fmemopen2.c X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14062313-1798-0000-0000-000002F45A8A This patch updates tst-fmemopen2 to check for fmemopen with NULL buffer inputs and also refactor the code a bit. --- * stdio-common/tst-fmemopen2.c (do_test): Add test for NULL and zero length buffers. --- diff --git a/stdio-common/tst-fmemopen2.c b/stdio-common/tst-fmemopen2.c index c2a4baa..652c412 100644 --- a/stdio-common/tst-fmemopen2.c +++ b/stdio-common/tst-fmemopen2.c @@ -5,64 +5,196 @@ 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); + + FILE *fp = fmemopen (buf, nbuf, "w"); if (fp == NULL) { - puts ("fmemopen failed"); - return 0; + printf ("%s: fmemopen failed\n", __FUNCTION__); + return 1; } + 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 %ld, expected %zu\n", o, nstr); + printf ("%s: first ftello returned %ld, expected %zu\n", + __FUNCTION__, o, nstr); result = 1; } + rewind (fp); o = ftello (fp); if (o != 0) { - printf ("second ftello returned %ld, expected 0\n", o); + printf ("%s: second ftello returned %ld, expected 0\n", + __FUNCTION__, o); result = 1; } if (fseeko (fp, 0, SEEK_END) != 0) { - puts ("fseeko failed"); - return 1; + printf ("%s: fseeko failed\n", __FUNCTION__); + result = 1; } o = ftello (fp); if (o != nstr) { - printf ("third ftello returned %ld, expected %zu\n", o, nstr); + printf ("%s: third ftello returned %ld, expected %zu\n", + __FUNCTION__, o, nbuf); result = 1; } + 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 %ld, expected %zu\n", o, nstr2); + printf ("%s: fourth ftello returned %ld, expected %zu\n", + __FUNCTION__, o, nstr2); result = 1; } fclose (fp); + static const char str3[] = "just hellod"; if (strcmp (buf, str3) != 0) { - printf ("final string is \"%s\", expected \"%s\"\n", - buf, str3); + printf ("%s: final string is \"%s\", expected \"%s\"\n", + __FUNCTION__, buf, str3); result = 1; } return result; } +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 ("%s: fmemopen failed\n", __FUNCTION__); + return 1; + } + + 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 ("%s: first ftello returned %ld, expected %zu\n", + __FUNCTION__, o, nstr); + result = 1; + } + if (fseeko (fp, 0, SEEK_END) != 0) + { + printf ("%s: fseeko failed\n", __FUNCTION__); + result = 1; + } + o = ftello (fp); + if (o != nstr) + { + printf ("%s: second ftello returned %ld, expected %zu\n", + __FUNCTION__, o, nbuf); + result = 1; + } + 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 ("%s: third ftello returned %ld, expected %zu\n", + __FUNCTION__, o, nstr2); + result = 1; + } + fclose (fp); + + return result; +} + +static int +do_test_length_zero (void) +{ + int result = 0; + FILE *fp; + char buf[] = ""; + const size_t nbuf = 0; + int r; + + fp = fmemopen (buf, nbuf, "r"); + if (fp == NULL) + { + printf ("%s: fmemopen failed\n", __FUNCTION__); + return 1; + } + + /* Reading any data on a zero-length buffer should return EOF */ + if ((r = fgetc (fp)) != EOF) + { + printf ("%s: fgetc on a zero-lenght returned: %d\n", + __FUNCTION__, r); + result = 1; + } + off_t o = ftello (fp); + if (o != 0) + { + printf ("%s: first ftello returned %ld, expected 0\n", + __FUNCTION__, 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 ("%s: second fmemopen failed\n", __FUNCTION__); + return 1; + } + + static const char str[] = "hello world"; + /* Because of buffering, fputs call itself don't fail, however the final + buffer should be not changed because of lenght 0 passed in fmemopen + call. */ + fputs (str, fp); + fclose (fp); + + if (strcmp (buf, "") != 0) + { + printf ("%s: strcmp (%s, "") failed\n", __FUNCTION__, 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"