tinyUSB/tinyusb/common/common.h

/*
 * common.h
 *
 *  Created on: Nov 26, 2012
 *      Author: hathach
 */

/*
 * Software License Agreement (BSD License)
 * Copyright (c) 2013, hathach (tinyusb.org)
 * All rights reserved.
 *
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 THE AUTHOR 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.
 *
 * This file is part of the tinyUSB stack.
 */

/** \file
 *  \brief Common Header File
 *
 *  \note TBD
 */

/** \defgroup Group_Common Common Files
 * @{
 *
 *  \defgroup Group_CommonH common.h
 *
 *  @{
 */

#ifndef _TUSB_COMMON_H_
#define _TUSB_COMMON_H_

#ifdef __cplusplus
 extern "C" {
#endif

//--------------------------------------------------------------------+
// INCLUDES
//--------------------------------------------------------------------+

//------------- Standard Header -------------//
#include "primitive_types.h"
#include <stddef.h>
#include <string.h>
#include <stdio.h>

//------------- TUSB Option Header -------------//
#include "tusb_option.h"

//------------- General Header -------------//
#include "compiler/compiler.h"
#include "assertion.h"
#include "binary.h"
#include "errors.h"

//------------- TUSB Header -------------//
#include "core/tusb_types.h"
#include "core/std_descriptors.h"
#include "core/std_request.h"

//--------------------------------------------------------------------+
// MACROS
//--------------------------------------------------------------------+
#define STRING_(x)  #x                             // stringify without expand
#define XSTRING_(x) STRING_(x)                     // expand then stringify
#define STRING_CONCAT_(a, b) a##b                  // concat without expand
#define XSTRING_CONCAT_(a, b) STRING_CONCAT_(a, b) // expand then concat

#define U16_HIGH_U8(u16) ((uint8_t) (((u16) > 8) & 0x00ff))
#define U16_LOW_U8(u16)  ((uint8_t) ((u16)       & 0x00ff))
#define U16_TO_U8S_BE(u16)  U16_HIGH_U8(u16), U16_LOW_U8(u16)
#define U16_TO_U8S_LE(u16)  U16_LOW_U8(u16), U16_HIGH_U8(u16)

#define U32_B1_U8(u32) ((uint8_t) (((u32) > 24) & 0x000000ff)) // MSB
#define U32_B2_U8(u32) ((uint8_t) (((u32) > 16) & 0x000000ff))
#define U32_B3_U8(u32) ((uint8_t) (((u32) >  8) & 0x000000ff))
#define U32_B4_U8(u32) ((uint8_t) ((u32)        & 0x000000ff)) // LSB

#define U32_TO_U8S_BE(u32) U32_B1_U8(u32), U32_B2_U8(u32), U32_B3_U8(u32), U32_B4_U8(u32)
#define U32_TO_U8S_LE(u32) U32_B4_U8(u32), U32_B3_U8(u32), U32_B2_U8(u32), U32_B1_U8(u32)

//--------------------------------------------------------------------+
// INLINE FUNCTION
//--------------------------------------------------------------------+
#define memclr_(buffer, size)  memset(buffer, 0, size)

//------------- Conversion -------------//
/// form an uint32_t from 4 x uint8_t
static inline uint32_t u32_from_u8(uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t u32_from_u8(uint8_t b1, uint8_t b2, uint8_t b3, uint8_t b4)
{
  return (b1 << 24) + (b2 << 16) + (b3 << 8) + b4;
}

//------------- Min -------------//
static inline uint8_t min8_of(uint8_t x, uint8_t y) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint8_t min8_of(uint8_t x, uint8_t y)
{
  return (x < y) ? x : y;
}

static inline uint32_t min32_of(uint32_t x, uint32_t y) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t min32_of(uint32_t x, uint32_t y)
{
  return (x < y) ? x : y;
}

//------------- Max -------------//
static inline uint32_t max32_of(uint32_t x, uint32_t y) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t max32_of(uint32_t x, uint32_t y)
{
  return (x > y) ? x : y;
}

//------------- Align -------------//
static inline uint32_t align32 (uint32_t value) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t align32 (uint32_t value)
{
	return (value & 0xFFFFFFE0UL);
}

static inline uint32_t align16 (uint32_t value) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t align16 (uint32_t value)
{
	return (value & 0xFFFFFFF0UL);
}

static inline uint32_t align_n (uint32_t alignment, uint32_t value) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t align_n (uint32_t alignment, uint32_t value)
{
	return value & (~(alignment-1));
}

static inline uint32_t align4k (uint32_t value) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t align4k (uint32_t value)
{
	return (value & 0xFFFFF000UL);
}

static inline uint32_t offset4k(uint32_t value) ATTR_ALWAYS_INLINE ATTR_CONST;
static inline uint32_t offset4k(uint32_t value)
{
	return (value & 0xFFFUL);
}

#ifdef __cplusplus
 }
#endif

#endif /* _TUSB_COMMON_H_ */

/**  @} */
/**  @} */