libcruft-util/debug.hpp

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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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*
* Copyright 2010-2015 Danny Robson <danny@nerdcruft.net>
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*/
#ifndef __DEBUG_HPP
#define __DEBUG_HPP
//#include "maths.hpp" // XXX: See notes at the end of file for maths.hpp inclusion
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#include <iostream>
#include <sstream>
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#include <stdexcept>
#include <string>
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///////////////////////////////////////////////////////////////////////////////
#ifdef ENABLE_DEBUGGING
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#define DEBUG_ONLY(X) do { \
X \
} while (0)
#else
#define DEBUG_ONLY(X)
#endif
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///////////////////////////////////////////////////////////////////////////////
#define EXIT_XSUCCESS 0
#define EXIT_XSKIP 77
#define EXIT_XHARD_ERROR 99
///////////////////////////////////////////////////////////////////////////////
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#define TRACE { \
DEBUG_ONLY( \
std::cerr << __FILE__ << ":" << __func__ << ":" << __LINE__ << std::endl; \
); \
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}
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#define WARN(C) do { \
DEBUG_ONLY( \
if (C) { \
std::cerr << __FILE__ << ":" << __func__ << ":" << __LINE__ << ", " << #C << std::endl; \
} \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define _CHECK_META(C, SUCCESS, FAILURE) do { \
const auto __DEBUG_value = (C); \
if (!__DEBUG_value) { \
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std::cerr << PACKAGE << ": " \
<< __FILE__ << ":" \
<< __LINE__ << ": " \
<< __FUNCTION__ \
<< ". Assertion '" << #C \
<< "' failed: " << __DEBUG_value << std::endl; \
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\
{ FAILURE } \
} else { \
{ SUCCESS } \
} \
} while (0)
///////////////////////////////////////////////////////////////////////////////
#define CHECK(C) do { DEBUG_ONLY(_CHECK_META((C), { ; }, { panic (); });); } while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_EQ(A,B) do { \
DEBUG_ONLY( \
const auto __a = (A); \
const auto __b = (B); \
_CHECK_META (almost_equal (__a, __b), \
{ ; }, \
{ \
std::ostringstream __debug_os; \
__debug_os.precision (15); \
__debug_os \
<< "expected equality.\n" \
<< "__a: " << #A << " is " << __a << ")" \
<< "\n != \n" \
<< "__b: " << #B << " is " << __b << ")"; \
panic (__debug_os.str ()); \
}); \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_LT(A,B) do { \
DEBUG_ONLY( \
const auto __a = (A); \
const auto __b = (B); \
_CHECK_META (__a < __b, \
{ ; }, \
{ \
std::ostringstream __debug_check_lt_os; \
__debug_check_lt_os \
<< "expected less than.\n" \
<< "__a: " << #A << " is " << __a << ")" \
<< "\n >= \n" \
<< "__b: " << #B << " is " << __b << ")"; \
panic (__debug_check_lt_os.str ()); \
}); \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_LE(A,B) do { \
DEBUG_ONLY( \
const auto __a = (A); \
const auto __b = (B); \
_CHECK_META (__a <= __b, \
{ ; }, \
{ \
std::ostringstream __debug_check_lt_os; \
__debug_check_lt_os \
<< "expected less or equal to\n" \
<< "__a: " << #A << " is " << __a << ")" \
<< "\n > \n" \
<< "__b: " << #B << " is " << __b << ")"; \
panic (__debug_check_lt_os.str ()); \
}); \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_GT(A,B) do { \
DEBUG_ONLY( \
const auto __a = (A); \
const auto __b = (B); \
_CHECK_META (__a > __b, \
{ ; }, \
{ \
std::ostringstream __debug_check_gt_os; \
__debug_check_gt_os \
<< "expected greater than.\n" \
<< "__a: " << #A << " is " << __a << ")" \
<< "\n <= \n" \
<< "__b: " << #B << " is " << __b << ")"; \
panic (__debug_check_gt_os.str ()); \
}); \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_GE(A,B) do { \
DEBUG_ONLY( \
const auto __a = (A); \
const auto __b = (B); \
_CHECK_META (__a >= __b, \
{ ; }, \
{ \
std::ostringstream __debug_check_gt_os; \
__debug_check_gt_os \
<< "expected greater or equal to.\n" \
<< "__a: " << #A << " is " << __a << ")" \
<< "\n < \n" \
<< "__b: " << #B << " is " << __b << ")"; \
panic (__debug_check_gt_os.str ()); \
}); \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
#define CHECK_LIMIT(VAL,LO,HI) do { \
DEBUG_ONLY( \
const auto __val = (VAL); \
const auto __hi = (HI); \
const auto __lo = (LO); \
\
_CHECK_META (__val >= __lo && __val <= __hi, \
{ ; }, \
{ \
std::ostringstream __os; \
__os << "expected satisifies limit\n" \
<< "__val: " << #VAL << " = " << __val << '\n' \
<< "__lo: " << #LO << " = " << __lo << '\n' \
<< "__hi: " << #HI << " = " << __hi << '\n'; \
panic (__os.str ()); \
}); \
); \
} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_NEQ(A,B) do { \
DEBUG_ONLY( \
const auto __a = (A); \
const auto __b = (B); \
_CHECK_META (!almost_equal (__a, __b), \
{ ; }, \
{ \
std::ostringstream __debug_neq_os; \
__debug_neq_os << "unexpected equality.\n" \
<< "__a: " << #A << " is " << __a << ")" \
<< "\n == \n" \
<< "__b: " << #B << " is " << __b << ")"; \
panic (__debug_neq_os.str ()); \
}); \
); \
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} while (0)
///////////////////////////////////////////////////////////////////////////////
#define CHECK_ZERO(A) do { \
DEBUG_ONLY( \
const auto __a = (A); \
_CHECK_META (almost_zero (__a), \
{ ; }, \
{ \
std::ostringstream __debug_nez_os; \
__debug_nez_os << "expected zero.\n" \
<< "__a: " << #A << " is " << __a << ")"; \
panic (__debug_nez_os.str ()); \
}); \
); \
} while (0)
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///////////////////////////////////////////////////////////////////////////////
#define CHECK_NEZ(A) do { \
DEBUG_ONLY( \
const auto __a = (A); \
_CHECK_META (!almost_zero (__a), \
{ ; }, \
{ \
std::ostringstream __debug_nez_os; \
__debug_nez_os << "unexpected zero.\n" \
<< "__a: " << #A << " is " << __a << ")"; \
panic (__debug_nez_os.str ()); \
}); \
); \
} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_THROWS(E,C) do { \
DEBUG_ONLY( \
bool caught = false; \
\
try \
{ C; } \
catch (E) \
{ caught = true; } \
\
if (!caught) \
panic ("expected exception: " #E); \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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#define CHECK_NOTHROW(C) do { \
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DEBUG_ONLY( \
try { \
C; \
} catch (...) { \
panic ("unexpected exception"); \
} \
); \
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} while (0)
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///////////////////////////////////////////////////////////////////////////////
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class panic_error {
protected:
std::string m_what;
public:
explicit panic_error (const std::string &_what):
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m_what (_what)
{ ; }
};
///////////////////////////////////////////////////////////////////////////////
void panic [[noreturn]] (const std::string&);
constexpr void panic [[noreturn]] (const char*);
constexpr void panic [[noreturn]] (void);
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///////////////////////////////////////////////////////////////////////////////
constexpr void not_implemented [[noreturn]] (void);
constexpr void not_implemented [[noreturn]] (const char *msg);
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///////////////////////////////////////////////////////////////////////////////
constexpr void unreachable [[noreturn]] (void);
constexpr void unreachable [[noreturn]] (const char*);
void unusual (void);
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///////////////////////////////////////////////////////////////////////////////
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void breakpoint (void);
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///////////////////////////////////////////////////////////////////////////////
void enable_fpe (void);
void disable_fpe (void);
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///////////////////////////////////////////////////////////////////////////////
namespace util { namespace debug {
void init (void);
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template <typename T>
bool valid (const T&);
template <
template<size_t, typename...> class T,
size_t S,
typename ...Args
>
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struct validator {
static bool is_valid (const T<S,Args...>&);
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};
template <
template<size_t,typename...> class T,
size_t S,
typename ...Args
>
bool valid (const T<S,Args...> &v)
{ return validator<T,S,Args...>::is_valid (v); }
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template <typename T>
void sanity (const T &t)
{
(void)t;
CHECK (valid (t));
}
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template <
template<typename...> class T,
typename ...Args
>
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void sanity (const T<Args...> &t)
{
(void)t;
CHECK (valid (t));
}
} }
///////////////////////////////////////////////////////////////////////////////
// XXX: maths needs to be included so that CHECK_EQ/NEQ can call almost_equal,
// but maths.hpp might be using CHECK_ macros so we must include maths.hpp
// after we define the CHECK_ macros so the preprocessor can resolve them.
#include "./maths.hpp"
#include "./debug.ipp"
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#endif // __DEBUG_HPP