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authorZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
committerZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
commit5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch)
tree4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/stdio-common/tst-fmemopen2.c
parent199fc19d3aaaf57944ef036e15904febe877fc93 (diff)
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Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage directory, REORG.TODO, except for files that will certainly still exist in their current form at top level when we're done (COPYING, COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which are moved to the new directory OldChangeLogs, instead), and the generated file INSTALL (which is just deleted; in the new order, there will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/stdio-common/tst-fmemopen2.c')
-rw-r--r--REORG.TODO/stdio-common/tst-fmemopen2.c262
1 files changed, 262 insertions, 0 deletions
diff --git a/REORG.TODO/stdio-common/tst-fmemopen2.c b/REORG.TODO/stdio-common/tst-fmemopen2.c
new file mode 100644
index 0000000000..891b7ca111
--- /dev/null
+++ b/REORG.TODO/stdio-common/tst-fmemopen2.c
@@ -0,0 +1,262 @@
+/* fmemopen tests.
+ Copyright (C) 2015-2017 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 <stdint.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"