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/******************************************************************************
* The MIT License
*
* Copyright (c) 2010 Perry Hung.
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*****************************************************************************/
/**
* @file util.h
* @brief Miscellaneous utility macros and procedures.
*/
#include "libmaple_types.h"
#ifndef _UTIL_H_
#define _UTIL_H_
#ifdef __cplusplus
extern "C"{
#endif
/*
* Bit manipulation
*/
/** 1 << the bit number */
#define BIT(shift) (1UL << (shift))
/** Mask shifted left by 'shift' */
#define BIT_MASK_SHIFT(mask, shift) ((mask) << (shift))
/** Bits m to n of x */
#define GET_BITS(x, m, n) ((((uint32)x) << (31 - (n))) >> ((31 - (n)) + (m)))
/** True if v is a power of two (1, 2, 4, 8, ...) */
#define IS_POWER_OF_TWO(v) ((v) && !((v) & ((v) - 1)))
/*
* Failure routines
*/
void __error(void);
void _fail(const char*, int, const char*);
void throb(void);
/*
* Asserts and debug levels
*/
#define DEBUG_NONE 0
#define DEBUG_FAULT 1
#define DEBUG_ALL 2
/**
* \def DEBUG_LEVEL
*
* Controls the level of assertion checking.
*
* The higher the debug level, the more assertions will be compiled
* in. This increases the amount of debugging information, but slows
* down (and increases the size of) the binary.
*
* The debug levels, from lowest to highest, are DEBUG_NONE,
* DEBUG_FAULT, and DEBUG_ALL. The default level is DEBUG_ALL.
*/
#ifndef DEBUG_LEVEL
#define DEBUG_LEVEL DEBUG_ALL
#endif
#if DEBUG_LEVEL >= DEBUG_ALL
#define ASSERT(exp) \
if (exp) { \
} else { \
_fail(__FILE__, __LINE__, #exp); \
}
#else
#define ASSERT(exp) (void)((0))
#endif
#if DEBUG_LEVEL >= DEBUG_FAULT
#define ASSERT_FAULT(exp) \
if (exp) { \
} else { \
_fail(__FILE__, __LINE__, #exp); \
}
#else
#define ASSERT_FAULT(exp) (void)((0))
#endif
#ifdef __cplusplus
} // extern "C"
#endif
#endif
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