nut-debian/tests/nutlogtest.c

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2022-07-10 10:23:45 +03:00
/* nutlogtest - some trivial usage for upslog*() and upsdebug*() related
* routines to sanity-check their code (compiler does not warn, test runs
* do not crash).
*
* Copyright (C)
* 2020 Jim Klimov <jimklimov@gmail.com>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "common.h"
int main(void) {
const char *s1 = "!NULL";
const char *s2 = NULL;
#if (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_PUSH_POP) && (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_IGNORED_FORMAT_OVERFLOW)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wformat-overflow"
#endif
upsdebugx(0, "D: checking with libc handling of NULL: '%s' vs '%s'", s1, s2);
/* This explicitly does not work with -Wformat, due to verbatim NULL without a var:
* nutlogtest.c:20:5: error: reading through null pointer (argument 4) [-Werror=format=]
* and also due to (void*) vs (char*) in naive case:
* upsdebugx(0, "D: '%s' vs '%s'", NUT_STRARG(NULL), NULL);
* but with casting the explicit NULL remains:
* upsdebugx(0, "D: '%s' vs '%s'", NUT_STRARG((char *)NULL), (char *)NULL);
*/
upsdebugx(0, "D: checking with NUT_STRARG macro: '%s' vs '%s'", NUT_STRARG(s2), s2);
#ifdef NUT_STRARG
#undef NUT_STRARG
#endif
#define NUT_STRARG(x) (x?x:"<N/A>")
/* This explicitly does not work with -Wformat, due to a NULL in the '%s'
* format string expansion (e.g. due to NUT PR #675 conversion to macros):
* ../include/common.h:155:41: warning: '%s' directive argument is null [-Wformat-overflow=]
* <...snip...>
* nutlogtest.c:45:63: note: format string is defined here
* 45 | upsdebugx(0, "D: checking with NUT_STRARG macro: '%s' vs '%s'", NUT_STRARG(s2), s2);
* | ^~
*/
upsdebugx(0, "D: checking that macro wrap trick works: '%s' vs '%s'", NUT_STRARG(s2), s2);
#if (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_PUSH_POP) && (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_IGNORED_FORMAT_OVERFLOW)
# pragma GCC diagnostic pop
#endif
return 0;
}