135 lines
4.9 KiB
C
135 lines
4.9 KiB
C
/**************************************************************************/
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/*!
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@file binary.h
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@author hathach (tinyusb.org)
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@section LICENSE
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Software License Agreement (BSD License)
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Copyright (c) 2013, hathach (tinyusb.org)
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the copyright holders nor the
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names of its contributors may be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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INCLUDING NEGLIGENCE OR OTHERWISE ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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This file is part of the tinyusb stack.
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*/
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/**************************************************************************/
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/** \addtogroup Group_Common Common Files
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* @{
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* \defgroup Group_Binary binary.h
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* @{ */
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#ifndef _TUSB_BINARY_H_
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#define _TUSB_BINARY_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "primitive_types.h"
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#include "compiler/compiler.h"
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//------------- Bit manipulation -------------//
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#define BIT_(n) (1U << (n)) ///< n-th Bit
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#define BIT_SET_(x, n) ( (x) | BIT_(n) ) ///< set n-th bit of x to 1
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#define BIT_CLR_(x, n) ( (x) & (~BIT_(n)) ) ///< clear n-th bit of x
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#define BIT_TEST_(x, n) ( ((x) & BIT_(n)) ? true : false ) ///< check if n-th bit of x is 1
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static inline uint32_t bit_set(uint32_t value, uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
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static inline uint32_t bit_set(uint32_t value, uint8_t n)
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{
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return value | BIT_(n);
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}
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static inline uint32_t bit_clear(uint32_t value, uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
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static inline uint32_t bit_clear(uint32_t value, uint8_t n)
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{
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return value & (~BIT_(n));
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}
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static inline bool bit_test(uint32_t value, uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
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static inline bool bit_test(uint32_t value, uint8_t n)
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{
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return (value & BIT_(n)) ? true : false;
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}
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///< create a mask with n-bit lsb set to 1
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static inline uint32_t bit_mask(uint8_t n) ATTR_CONST ATTR_ALWAYS_INLINE;
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static inline uint32_t bit_mask(uint8_t n)
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{
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return (n < 32) ? ( BIT_(n) - 1 ) : UINT32_MAX;
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}
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static inline uint32_t bit_mask_range(uint8_t start, uint32_t end) ATTR_CONST ATTR_ALWAYS_INLINE;
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static inline uint32_t bit_mask_range(uint8_t start, uint32_t end)
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{
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return bit_mask(end+1) & ~ bit_mask(start);
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}
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static inline uint32_t bit_set_range(uint32_t value, uint8_t start, uint8_t end, uint32_t pattern) ATTR_CONST ATTR_ALWAYS_INLINE;
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static inline uint32_t bit_set_range(uint32_t value, uint8_t start, uint8_t end, uint32_t pattern)
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{
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return ( value & ~bit_mask_range(start, end) ) | (pattern << start);
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}
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//------------- Binary Constant -------------//
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#if defined(__GNUC__) && !defined(__CC_ARM)
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#define BIN8(x) ((uint8_t) (0b##x))
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#define BIN16(b1, b2) ((uint16_t) (0b##b1##b2))
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#define BIN32(b1, b2, b3, b4) ((uint32_t) (0b##b1##b2##b3##b4))
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#else
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// internal macro of B8, B16, B32
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#define _B8__(x) (((x&0x0000000FUL)?1:0) \
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+((x&0x000000F0UL)?2:0) \
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+((x&0x00000F00UL)?4:0) \
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+((x&0x0000F000UL)?8:0) \
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+((x&0x000F0000UL)?16:0) \
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+((x&0x00F00000UL)?32:0) \
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+((x&0x0F000000UL)?64:0) \
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+((x&0xF0000000UL)?128:0))
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#define BIN8(d) ((uint8_t) _B8__(0x##d##UL))
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#define BIN16(dmsb,dlsb) (((uint16_t)BIN8(dmsb)<<8) + BIN8(dlsb))
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#define BIN32(dmsb,db2,db3,dlsb) \
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(((uint32_t)BIN8(dmsb)<<24) \
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+ ((uint32_t)BIN8(db2)<<16) \
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+ ((uint32_t)BIN8(db3)<<8) \
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+ BIN8(dlsb))
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif /* _TUSB_BINARY_H_ */
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/** @} */
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/** @} */
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