Mercurial > gnulib
view tests/test-ftello3.c @ 40214:452ab00796c7
Fix undefined behaviour.
* lib/bitrotate.h (rotl16, rotr16, rotl8, rotr8): Case x to
'unsigned int', to avoid shift operations on 'int'.
* lib/xmemdup0.c (xmemdup0): Don't invoke memcpy with a zero size.
* tests/test-count-leading-zeros.c (main): Use a random number that has
as many bits as TYPE, not only 2*15 or 2*31 bits.
* tests/test-count-trailing-zeros.c (main): Likewise.
* tests/test-count-one-bits.c (main): Likewise.
* tests/test-memmem.c: Don't include "null-ptr.h".
(main): Use zerosize_ptr() instead of null_ptr().
* modules/memmem-tests (Files): Remove tests/null-ptr.h.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 20:32:25 +0100 |
parents | b06060465f09 |
children |
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/* Test of ftello() function. Copyright (C) 2007-2019 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 <https://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-ftello3.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 (ftello (fp) == 8); ASSERT (ftello (fp) == 8); ASSERT (putc ('!', fp) == '!'); ASSERT (ftello (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; }