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author | Ulrich Drepper <drepper@redhat.com> | 2004-12-06 22:33:26 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2004-12-06 22:33:26 +0000 |
commit | e9a37a8390f6eb6e7ee34a1de8791ad9c16e3cef (patch) | |
tree | 6a43006626eb03a87c772e68cc1dfc0a692d241e /libio/bug-ungetc4.c | |
parent | 60fce589e8c4b177ee5025269987476826ab6b0f (diff) | |
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Test for ungetc bug.
Diffstat (limited to 'libio/bug-ungetc4.c')
-rw-r--r-- | libio/bug-ungetc4.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/libio/bug-ungetc4.c b/libio/bug-ungetc4.c new file mode 100644 index 0000000000..0f530efecf --- /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; +} |