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authorUlrich Drepper <drepper@redhat.com>2004-12-06 22:33:26 +0000
committerUlrich Drepper <drepper@redhat.com>2004-12-06 22:33:26 +0000
commite9a37a8390f6eb6e7ee34a1de8791ad9c16e3cef (patch)
tree6a43006626eb03a87c772e68cc1dfc0a692d241e /libio/bug-ungetc4.c
parent60fce589e8c4b177ee5025269987476826ab6b0f (diff)
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Test for ungetc bug.
Diffstat (limited to 'libio/bug-ungetc4.c')
-rw-r--r--libio/bug-ungetc4.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/libio/bug-ungetc4.c b/libio/bug-ungetc4.c
new file mode 100644
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--- /dev/null
+++ b/libio/bug-ungetc4.c
@@ -0,0 +1,116 @@
+/* Test program for ungetc/fseekpos interaction.
+ Copyright (C) 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <stdio.h>
+
+static void do_prepare (void);
+#define PREPARE(argc, argv) do_prepare ()
+static int do_test (void);
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"
+
+static const char pattern[] = "abcdefghijklmnopqrstuvwxyz";
+static char *temp_file;
+
+static void
+do_prepare (void)
+{
+ int fd = create_temp_file ("bug-ungetc.", &temp_file);
+ if (fd == -1)
+ {
+ printf ("cannot create temporary file: %m\n");
+ exit (1);
+ }
+ write (fd, pattern, sizeof (pattern) - 1);
+ close (fd);
+}
+
+#define TEST_POS 5
+
+static int
+do_one_test (int mode)
+{
+ FILE *f = fopen (temp_file, "r");
+ if (f == NULL)
+ {
+ printf ("%d: could not open temporary file: %m\n", mode);
+ return 1;
+ }
+
+ int i;
+ for (i = 0; i < TEST_POS; ++i)
+ getc (f);
+
+ fpos_t p;
+ if (fgetpos (f, &p) != 0)
+ {
+ printf ("%d: fgetpos failed: %m\n", mode);
+ return 1;
+ }
+
+ if (mode)
+ {
+ if (fseek (f, 0, SEEK_SET) != 0)
+ {
+ printf ("%d: fseek failed: %m\n", mode);
+ return 1;
+ }
+
+ for (i = 0; i < TEST_POS - (mode >= 2); ++i)
+ getc (f);
+ }
+
+ if (mode != 2 && ungetc ('X', f) != 'X')
+ {
+ printf ("%d: ungetc failed\n", mode);
+ return 1;
+ }
+
+ if (mode == 3 && getc (f) != 'X')
+ {
+ printf ("%d: getc after ungetc did not return X\n", mode);
+ return 1;
+ }
+
+ if (fsetpos (f, &p) != 0)
+ {
+ printf ("%d: fsetpos failed: %m\n", mode);
+ return 1;
+ }
+
+ if (getc (f) != pattern[TEST_POS])
+ {
+ printf ("%d: getc did not return %c\n", mode, pattern[TEST_POS]);
+ return 1;
+ }
+
+ fclose (f);
+
+ return 0;
+}
+
+static int
+do_test (void)
+{
+ int mode, ret = 0;
+ for (mode = 0; mode <= 4; mode++)
+ ret |= do_one_test (mode);
+ return ret;
+}