66 lines
2.6 KiB
C
66 lines
2.6 KiB
C
/* nutlogtest - some trivial usage for upslog*() and upsdebug*() related
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* routines to sanity-check their code (compiler does not warn, test runs
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* do not crash).
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*
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* Copyright (C)
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* 2020 Jim Klimov <jimklimov@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "common.h"
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int main(void) {
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const char *s1 = "!NULL";
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const char *s2 = NULL;
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#if (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_PUSH_POP) && (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_IGNORED_FORMAT_OVERFLOW)
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# pragma GCC diagnostic push
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# pragma GCC diagnostic ignored "-Wformat-overflow"
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#endif
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upsdebugx(0, "D: checking with libc handling of NULL: '%s' vs '%s'", s1, s2);
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/* This explicitly does not work with -Wformat, due to verbatim NULL without a var:
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* nutlogtest.c:20:5: error: reading through null pointer (argument 4) [-Werror=format=]
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* and also due to (void*) vs (char*) in naive case:
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* upsdebugx(0, "D: '%s' vs '%s'", NUT_STRARG(NULL), NULL);
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* but with casting the explicit NULL remains:
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* upsdebugx(0, "D: '%s' vs '%s'", NUT_STRARG((char *)NULL), (char *)NULL);
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*/
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upsdebugx(0, "D: checking with NUT_STRARG macro: '%s' vs '%s'", NUT_STRARG(s2), s2);
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#ifdef NUT_STRARG
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#undef NUT_STRARG
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#endif
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#define NUT_STRARG(x) (x?x:"<N/A>")
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/* This explicitly does not work with -Wformat, due to a NULL in the '%s'
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* format string expansion (e.g. due to NUT PR #675 conversion to macros):
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* ../include/common.h:155:41: warning: '%s' directive argument is null [-Wformat-overflow=]
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* <...snip...>
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* nutlogtest.c:45:63: note: format string is defined here
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* 45 | upsdebugx(0, "D: checking with NUT_STRARG macro: '%s' vs '%s'", NUT_STRARG(s2), s2);
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* | ^~
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*/
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upsdebugx(0, "D: checking that macro wrap trick works: '%s' vs '%s'", NUT_STRARG(s2), s2);
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#if (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_PUSH_POP) && (defined HAVE_PRAGMA_GCC_DIAGNOSTIC_IGNORED_FORMAT_OVERFLOW)
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# pragma GCC diagnostic pop
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#endif
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return 0;
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}
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