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/* require.h -- useful error-handling macros
* Copyright (C) 2013, 2014 Galois, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither Galois's name nor the names of other contributors may be used to
* endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY GALOIS AND OTHER CONTRIBUTORS "AS IS" AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL GALOIS OR OTHER CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
#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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