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/* require.h -- useful error-handling macros
* Copyright (C) 2013 Galois, Inc.
*
* This library 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 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 General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this library. If not, see <http://www.gnu.org/licenses/>.
*
* To contact Galois, complete the Web form at
* <http://corp.galois.com/contact/> or write to Galois, Inc., 421 Southwest
* 6th Avenue, Suite 300, Portland, Oregon, 97204-1622. */
#ifndef REQUIRE_H
#define REQUIRE_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#define require_not(var, val, ret_val) \
do { \
if ((var) != val) { \
r = ret_val; \
goto done; \
} \
} while (0)
#define require_zero(var, ret_val) require_not(var, 0, ret_val)
#define require_one(var, ret_val) require_not(var, 1, ret_val)
#define require_nonnull(ptr, ret_val) \
do { \
if ((ptr) == NULL) { \
r = ret_val; \
goto done; \
} \
} while (0)
#endif
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