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/**********************************************************************
* Copyright (c) 2018 Pieter Wuille, Greg Maxwell, Gleb Naumenko *
* Distributed under the MIT software license, see the accompanying *
* file LICENSE or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/
#ifndef _MINISKETCH_UTIL_H_
#define _MINISKETCH_UTIL_H_
#ifdef MINISKETCH_VERIFY
#include <stdio.h>
#endif
#if !defined(__GNUC_PREREQ)
# if defined(__GNUC__)&&defined(__GNUC_MINOR__)
# define __GNUC_PREREQ(_maj,_min) \
((__GNUC__<<16)+__GNUC_MINOR__>=((_maj)<<16)+(_min))
# else
# define __GNUC_PREREQ(_maj,_min) 0
# endif
#endif
#if __GNUC_PREREQ(3, 0)
#define EXPECT(x,c) __builtin_expect((x),(c))
#else
#define EXPECT(x,c) (x)
#endif
/* Assertion macros */
/**
* Unconditional failure on condition failure.
* Primarily used in testing harnesses.
*/
#define CHECK(cond) do { \
if (EXPECT(!(cond), 0)) { \
fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, "Check condition failed: " #cond); \
abort(); \
} \
} while(0)
/**
* Check macro that does nothing in normal non-verify builds but crashes in verify builds.
* This is used to test conditions at runtime that should always be true, but are either
* expensive to test or in locations where returning on failure would be messy.
*/
#ifdef MINISKETCH_VERIFY
#define CHECK_SAFE(cond) CHECK(cond)
#else
#define CHECK_SAFE(cond)
#endif
/**
* Check a condition and return on failure in non-verify builds, crash in verify builds.
* Used for inexpensive conditions which believed to be always true in locations where
* a graceful exit is possible.
*/
#ifdef MINISKETCH_VERIFY
#define CHECK_RETURN(cond, rvar) do { \
if (EXPECT(!(cond), 0)) { \
fprintf(stderr, "%s:%d: %s\n", __FILE__, __LINE__, "Check condition failed: " #cond); \
abort(); \
return rvar; /* Does nothing, but causes compile to warn on incorrect return types. */ \
} \
} while(0)
#else
#define CHECK_RETURN(cond, rvar) do { \
if (EXPECT(!(cond), 0)) { \
return rvar; \
} \
} while(0)
#endif
#endif
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