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-rw-r--r--gnulib-tests/test-ftell3.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/gnulib-tests/test-ftell3.c b/gnulib-tests/test-ftell3.c
new file mode 100644
index 0000000..695e5b2
--- /dev/null
+++ b/gnulib-tests/test-ftell3.c
@@ -0,0 +1,78 @@
+/* Test of ftell() function.
+ Copyright (C) 2007-2016 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 <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* None of the files accessed by this test are large, so disable the
+ fseek link warning if we are not using the gnulib fseek module. */
+#define _GL_NO_LARGE_FILES
+#include <stdio.h>
+
+#include <string.h>
+
+#include "macros.h"
+
+#define TESTFILE "t-ftell3.tmp"
+
+int
+main (void)
+{
+ FILE *fp;
+
+ /* Create a file with some contents. */
+ fp = fopen (TESTFILE, "w");
+ if (fp == NULL)
+ goto skip;
+ if (fwrite ("foogarsh", 1, 8, fp) < 8)
+ goto skip;
+ if (fclose (fp))
+ goto skip;
+
+ /* The file's contents is now "foogarsh". */
+
+ /* Try writing after reading to EOF. */
+ fp = fopen (TESTFILE, "r+");
+ if (fp == NULL)
+ goto skip;
+ if (fseek (fp, -1, SEEK_END))
+ goto skip;
+ ASSERT (getc (fp) == 'h');
+ ASSERT (getc (fp) == EOF);
+ ASSERT (ftell (fp) == 8);
+ ASSERT (ftell (fp) == 8);
+ ASSERT (putc ('!', fp) == '!');
+ ASSERT (ftell (fp) == 9);
+ ASSERT (fclose (fp) == 0);
+ fp = fopen (TESTFILE, "r");
+ if (fp == NULL)
+ goto skip;
+ {
+ char buf[10];
+ ASSERT (fread (buf, 1, 10, fp) == 9);
+ ASSERT (memcmp (buf, "foogarsh!", 9) == 0);
+ }
+ ASSERT (fclose (fp) == 0);
+
+ /* The file's contents is now "foogarsh!". */
+
+ remove (TESTFILE);
+ return 0;
+
+ skip:
+ fprintf (stderr, "Skipping test: prerequisite file operations failed.\n");
+ remove (TESTFILE);
+ return 77;
+}