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Add missing SVN eol-style property to files where it was missing.

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Dean Camera 2011-07-15 08:46:08 +00:00
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168
LUFA/Common/Architectures.h
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@ -1,84 +1,84 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Supported library architecture defines.
*
* \copydetails Group_Architectures
*
* \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
* functionality.
*/
/** \ingroup Group_Common
* \defgroup Group_Architectures Hardware Architectures
* \brief Supported library architecture defines.
*
* Architecture macros for selecting the desired target microcontroller architecture. One of these values should be
* defined as the value of \c ARCH in the user project makefile via the \c -D compiler switch to GCC, to select the
* target architecture.
*
* The selected architecture should remain consistent with the makefile \c ARCH value, which is used to select the
* underlying driver source files for each architecture.
*
* @{
*/
#ifndef __LUFA_ARCHITECTURES_H__
#define __LUFA_ARCHITECTURES_H__
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_COMMON_H)
#error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** Selects the Atmel 8-bit AVR (AT90USB* and ATMEGA*U* chips) architecture. */
#define ARCH_AVR8 0
/** Selects the Atmel 32-bit UC3 AVR (AT32UC3* chips) architecture. */
#define ARCH_UC3 1
/** Selects the Atmel XMEGA AVR (ATXMEGA*U chips) architecture. */
#define ARCH_XMEGA 2
#if !defined(__DOXYGEN__)
#define ARCH_ ARCH_AVR8
#if !defined(ARCH)
#define ARCH ARCH_AVR8
#endif
#endif
#endif
/** @} */
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Supported library architecture defines.
*
* \copydetails Group_Architectures
*
* \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
* functionality.
*/
/** \ingroup Group_Common
* \defgroup Group_Architectures Hardware Architectures
* \brief Supported library architecture defines.
*
* Architecture macros for selecting the desired target microcontroller architecture. One of these values should be
* defined as the value of \c ARCH in the user project makefile via the \c -D compiler switch to GCC, to select the
* target architecture.
*
* The selected architecture should remain consistent with the makefile \c ARCH value, which is used to select the
* underlying driver source files for each architecture.
*
* @{
*/
#ifndef __LUFA_ARCHITECTURES_H__
#define __LUFA_ARCHITECTURES_H__
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_COMMON_H)
#error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** Selects the Atmel 8-bit AVR (AT90USB* and ATMEGA*U* chips) architecture. */
#define ARCH_AVR8 0
/** Selects the Atmel 32-bit UC3 AVR (AT32UC3* chips) architecture. */
#define ARCH_UC3 1
/** Selects the Atmel XMEGA AVR (ATXMEGA*U chips) architecture. */
#define ARCH_XMEGA 2
#if !defined(__DOXYGEN__)
#define ARCH_ ARCH_AVR8
#if !defined(ARCH)
#define ARCH ARCH_AVR8
#endif
#endif
#endif
/** @} */

196
LUFA/Common/CompilerSpecific.h
View file

@ -1,98 +1,98 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Compiler specific macros for code optimization and correctness.
*
* \copydetails Group_CompilerSpecific
*
* \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
* functionality.
*/
/** \ingroup Group_Common
* \defgroup Group_CompilerSpecific Compiler Specific Macros
* \brief Compiler specific macros for code optimization and correctness.
*
* Compiler specific macros to expose certain compiler features which may increase the level of code optimization
* for a specific compiler, or correct certain issues that may be present such as memory barriers for use in conjunction
* with atomic variable access.
*
* Where possible, on alternative compilers, these macros will either have no effect, or default to returning a sane value
* so that they can be used in existing code without the need for extra compiler checks in the user application code.
*
* @{
*/
#ifndef __LUFA_COMPILERSPEC_H__
#define __LUFA_COMPILERSPEC_H__
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_COMMON_H)
#error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
#if defined(__GNUC__) || defined(__DOXYGEN__)
/** Forces GCC to use pointer indirection (via the device's pointer register pairs) when accessing the given
* struct pointer. In some cases GCC will emit non-optimal assembly code when accessing a structure through
* a pointer, resulting in a larger binary. When this macro is used on a (non \c const) structure pointer before
* use, it will force GCC to use pointer indirection on the elements rather than direct store and load
* instructions.
*
* \param[in, out] StructPtr Pointer to a structure which is to be forced into indirect access mode.
*/
#define GCC_FORCE_POINTER_ACCESS(StructPtr) __asm__ __volatile__("" : "=b" (StructPtr) : "0" (StructPtr))
/** Forces GCC to create a memory barrier, ensuring that memory accesses are not reordered past the barrier point.
* This can be used before ordering-critical operations, to ensure that the compiler does not re-order the resulting
* assembly output in an unexpected manner on sections of code that are ordering-specific.
*/
#define GCC_MEMORY_BARRIER() __asm__ __volatile__("" ::: "memory");
/** Evaluates to boolean true if the specified value can be determined at compile time to be a constant value
* when compiling under GCC.
*
* \param[in] x Value to check compile time constantness of.
*
* \return Boolean true if the given value is known to be a compile time constant.
*/
#define GCC_IS_COMPILE_CONST(x) __builtin_constant_p(x)
#else
#define GCC_FORCE_POINTER_ACCESS(StructPtr)
#define GCC_MEMORY_BARRIER()
#define GCC_IS_COMPILE_CONST(x) 0
#endif
#endif
/** @} */
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Compiler specific macros for code optimization and correctness.
*
* \copydetails Group_CompilerSpecific
*
* \note Do not include this file directly, rather include the Common.h header file instead to gain this file's
* functionality.
*/
/** \ingroup Group_Common
* \defgroup Group_CompilerSpecific Compiler Specific Macros
* \brief Compiler specific macros for code optimization and correctness.
*
* Compiler specific macros to expose certain compiler features which may increase the level of code optimization
* for a specific compiler, or correct certain issues that may be present such as memory barriers for use in conjunction
* with atomic variable access.
*
* Where possible, on alternative compilers, these macros will either have no effect, or default to returning a sane value
* so that they can be used in existing code without the need for extra compiler checks in the user application code.
*
* @{
*/
#ifndef __LUFA_COMPILERSPEC_H__
#define __LUFA_COMPILERSPEC_H__
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_COMMON_H)
#error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
#if defined(__GNUC__) || defined(__DOXYGEN__)
/** Forces GCC to use pointer indirection (via the device's pointer register pairs) when accessing the given
* struct pointer. In some cases GCC will emit non-optimal assembly code when accessing a structure through
* a pointer, resulting in a larger binary. When this macro is used on a (non \c const) structure pointer before
* use, it will force GCC to use pointer indirection on the elements rather than direct store and load
* instructions.
*
* \param[in, out] StructPtr Pointer to a structure which is to be forced into indirect access mode.
*/
#define GCC_FORCE_POINTER_ACCESS(StructPtr) __asm__ __volatile__("" : "=b" (StructPtr) : "0" (StructPtr))
/** Forces GCC to create a memory barrier, ensuring that memory accesses are not reordered past the barrier point.
* This can be used before ordering-critical operations, to ensure that the compiler does not re-order the resulting
* assembly output in an unexpected manner on sections of code that are ordering-specific.
*/
#define GCC_MEMORY_BARRIER() __asm__ __volatile__("" ::: "memory");
/** Evaluates to boolean true if the specified value can be determined at compile time to be a constant value
* when compiling under GCC.
*
* \param[in] x Value to check compile time constantness of.
*
* \return Boolean true if the given value is known to be a compile time constant.
*/
#define GCC_IS_COMPILE_CONST(x) __builtin_constant_p(x)
#else
#define GCC_FORCE_POINTER_ACCESS(StructPtr)
#define GCC_MEMORY_BARRIER()
#define GCC_IS_COMPILE_CONST(x) 0
#endif
#endif
/** @} */

952
LUFA/Common/Endianness.h
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@ -1,476 +1,476 @@
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Endianness and Byte Ordering macros and functions.
*
* \copydetails Group_Endianness
*/
/** \ingroup Group_Endianness
* \defgroup Group_ByteSwapping Byte Reordering
* \brief Macros and functions for forced byte reordering.
*/
/** \ingroup Group_Endianness
* \defgroup Group_EndianConversion Endianness Conversion
* \brief Macros and functions for automatic endianness conversion.
*/
/** \ingroup Group_Common
* \defgroup Group_Endianness Endianness and Byte Ordering
* \brief Convenience macros and functions relating to byte (re-)ordering
*
* Common library convenience macros and functions relating to byte (re-)ordering.
*
* @{
*/
#ifndef __LUFA_ENDIANNESS_H__
#define __LUFA_ENDIANNESS_H__
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_COMMON_H)
#error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
#endif
#if !(defined(ARCH_BIG_ENDIAN) || defined(ARCH_LITTLE_ENDIAN))
#error ARCH_BIG_ENDIAN or ARCH_LITTLE_ENDIAN not set for the specified architecture.
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** Swaps the byte ordering of a 16-bit value at compile-time. Do not use this macro for swapping byte orderings
* of dynamic values computed at runtime, use \ref SwapEndian_16() instead. The result of this macro can be used
* inside struct or other variable initializers outside of a function, something that is not possible with the
* inline function variant.
*
* \ingroup Group_ByteSwapping
*
* \param[in] x 16-bit value whose byte ordering is to be swapped.
*
* \return Input value with the byte ordering reversed.
*/
#define SWAPENDIAN_16(x) (uint16_t)((((x) & 0xFF00) >> 8) | (((x) & 0x00FF) << 8))
/** Swaps the byte ordering of a 32-bit value at compile-time. Do not use this macro for swapping byte orderings
* of dynamic values computed at runtime- use \ref SwapEndian_32() instead. The result of this macro can be used
* inside struct or other variable initializers outside of a function, something that is not possible with the
* inline function variant.
*
* \ingroup Group_ByteSwapping
*
* \param[in] x 32-bit value whose byte ordering is to be swapped.
*
* \return Input value with the byte ordering reversed.
*/
#define SWAPENDIAN_32(x) (uint32_t)((((x) & 0xFF000000UL) >> 24UL) | (((x) & 0x00FF0000UL) >> 8UL) | \
(((x) & 0x0000FF00UL) << 8UL) | (((x) & 0x000000FFUL) << 24UL))
#if defined(ARCH_BIG_ENDIAN) && !defined(le16_to_cpu)
#define le16_to_cpu(x) SwapEndian_16(x)
#define le32_to_cpu(x) SwapEndian_32(x)
#define be16_to_cpu(x) x
#define be32_to_cpu(x) x
#define cpu_to_le16(x) SwapEndian_16(x)
#define cpu_to_le32(x) SwapEndian_32(x)
#define cpu_to_be16(x) x
#define cpu_to_be32(x) x
#define LE16_TO_CPU(x) SWAPENDIAN_16(x)
#define LE32_TO_CPU(x) SWAPENDIAN_32(x)
#define BE16_TO_CPU(x) x
#define BE32_TO_CPU(x) x
#define CPU_TO_LE16(x) SWAPENDIAN_16(x)
#define CPU_TO_LE32(x) SWAPENDIAN_32(x)
#define CPU_TO_BE16(x) x
#define CPU_TO_BE32(x) x
#elif !defined(le16_to_cpu)
/** \name Run-time endianness conversion */
//@{
/** Performs a conversion between a Little Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref LE16_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define le16_to_cpu(x) x
/** Performs a conversion between a Little Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref LE32_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define le32_to_cpu(x) x
/** Performs a conversion between a Big Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref BE16_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define be16_to_cpu(x) SwapEndian_16(x)
/** Performs a conversion between a Big Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref BE32_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define be32_to_cpu(x) SwapEndian_32(x)
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_LE16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_le16(x) x
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_LE32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_le32(x) x
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_BE16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_be16(x) SwapEndian_16(x)
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_BE32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_be32(x) SwapEndian_32(x)
//@}
/** \name Compile-time endianness conversion */
//@{
/** Performs a conversion between a Little Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run time endianness
* conversion, use \ref le16_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define LE16_TO_CPU(x) x
/** Performs a conversion between a Little Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run time endianness
* conversion, use \ref le32_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define LE32_TO_CPU(x) x
/** Performs a conversion between a Big Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref be16_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define BE16_TO_CPU(x) SWAPENDIAN_16(x)
/** Performs a conversion between a Big Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref be32_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define BE32_TO_CPU(x) SWAPENDIAN_32(x)
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_le16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_LE16(x) x
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_le32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_LE32(x) x
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_be16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_BE16(x) SWAPENDIAN_16(x)
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_be32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_BE32(x) SWAPENDIAN_32(x)
//! @}
#endif
/* Inline Functions: */
/** Function to reverse the byte ordering of the individual bytes in a 16 bit value.
*
* \ingroup Group_ByteSwapping
*
* \param[in] Word Word of data whose bytes are to be swapped.
*/
static inline uint16_t SwapEndian_16(const uint16_t Word) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
static inline uint16_t SwapEndian_16(const uint16_t Word)
{
uint8_t Temp;
union
{
uint16_t Word;
uint8_t Bytes[2];
} Data;
Data.Word = Word;
Temp = Data.Bytes[0];
Data.Bytes[0] = Data.Bytes[1];
Data.Bytes[1] = Temp;
return Data.Word;
}
/** Function to reverse the byte ordering of the individual bytes in a 32 bit value.
*
* \ingroup Group_ByteSwapping
*
* \param[in] DWord Double word of data whose bytes are to be swapped.
*/
static inline uint32_t SwapEndian_32(const uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
static inline uint32_t SwapEndian_32(const uint32_t DWord)
{
uint8_t Temp;
union
{
uint32_t DWord;
uint8_t Bytes[4];
} Data;
Data.DWord = DWord;
Temp = Data.Bytes[0];
Data.Bytes[0] = Data.Bytes[3];
Data.Bytes[3] = Temp;
Temp = Data.Bytes[1];
Data.Bytes[1] = Data.Bytes[2];
Data.Bytes[2] = Temp;
return Data.DWord;
}
/** Function to reverse the byte ordering of the individual bytes in a n byte value.
*
* \ingroup Group_ByteSwapping
*
* \param[in,out] Data Pointer to a number containing an even number of bytes to be reversed.
* \param[in] Length Length of the data in bytes.
*/
static inline void SwapEndian_n(void* const Data,
uint8_t Length) ATTR_NON_NULL_PTR_ARG(1);
static inline void SwapEndian_n(void* const Data,
uint8_t Length)
{
uint8_t* CurrDataPos = (uint8_t*)Data;
while (Length > 1)
{
uint8_t Temp = *CurrDataPos;
*CurrDataPos = *(CurrDataPos + Length - 1);
*(CurrDataPos + Length - 1) = Temp;
CurrDataPos++;
Length -= 2;
}
}
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, distribute, and sell this
software and its documentation for any purpose is hereby granted
without fee, provided that the above copyright notice appear in
all copies and that both that the copyright notice and this
permission notice and warranty disclaimer appear in supporting
documentation, and that the name of the author not be used in
advertising or publicity pertaining to distribution of the
software without specific, written prior permission.
The author disclaim all warranties with regard to this
software, including all implied warranties of merchantability
and fitness. In no event shall the author be liable for any
special, indirect or consequential damages or any damages
whatsoever resulting from loss of use, data or profits, whether
in an action of contract, negligence or other tortious action,
arising out of or in connection with the use or performance of
this software.
*/
/** \file
* \brief Endianness and Byte Ordering macros and functions.
*
* \copydetails Group_Endianness
*/
/** \ingroup Group_Endianness
* \defgroup Group_ByteSwapping Byte Reordering
* \brief Macros and functions for forced byte reordering.
*/
/** \ingroup Group_Endianness
* \defgroup Group_EndianConversion Endianness Conversion
* \brief Macros and functions for automatic endianness conversion.
*/
/** \ingroup Group_Common
* \defgroup Group_Endianness Endianness and Byte Ordering
* \brief Convenience macros and functions relating to byte (re-)ordering
*
* Common library convenience macros and functions relating to byte (re-)ordering.
*
* @{
*/
#ifndef __LUFA_ENDIANNESS_H__
#define __LUFA_ENDIANNESS_H__
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_COMMON_H)
#error Do not include this file directly. Include LUFA/Common/Common.h instead to gain this functionality.
#endif
#if !(defined(ARCH_BIG_ENDIAN) || defined(ARCH_LITTLE_ENDIAN))
#error ARCH_BIG_ENDIAN or ARCH_LITTLE_ENDIAN not set for the specified architecture.
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** Swaps the byte ordering of a 16-bit value at compile-time. Do not use this macro for swapping byte orderings
* of dynamic values computed at runtime, use \ref SwapEndian_16() instead. The result of this macro can be used
* inside struct or other variable initializers outside of a function, something that is not possible with the
* inline function variant.
*
* \ingroup Group_ByteSwapping
*
* \param[in] x 16-bit value whose byte ordering is to be swapped.
*
* \return Input value with the byte ordering reversed.
*/
#define SWAPENDIAN_16(x) (uint16_t)((((x) & 0xFF00) >> 8) | (((x) & 0x00FF) << 8))
/** Swaps the byte ordering of a 32-bit value at compile-time. Do not use this macro for swapping byte orderings
* of dynamic values computed at runtime- use \ref SwapEndian_32() instead. The result of this macro can be used
* inside struct or other variable initializers outside of a function, something that is not possible with the
* inline function variant.
*
* \ingroup Group_ByteSwapping
*
* \param[in] x 32-bit value whose byte ordering is to be swapped.
*
* \return Input value with the byte ordering reversed.
*/
#define SWAPENDIAN_32(x) (uint32_t)((((x) & 0xFF000000UL) >> 24UL) | (((x) & 0x00FF0000UL) >> 8UL) | \
(((x) & 0x0000FF00UL) << 8UL) | (((x) & 0x000000FFUL) << 24UL))
#if defined(ARCH_BIG_ENDIAN) && !defined(le16_to_cpu)
#define le16_to_cpu(x) SwapEndian_16(x)
#define le32_to_cpu(x) SwapEndian_32(x)
#define be16_to_cpu(x) x
#define be32_to_cpu(x) x
#define cpu_to_le16(x) SwapEndian_16(x)
#define cpu_to_le32(x) SwapEndian_32(x)
#define cpu_to_be16(x) x
#define cpu_to_be32(x) x
#define LE16_TO_CPU(x) SWAPENDIAN_16(x)
#define LE32_TO_CPU(x) SWAPENDIAN_32(x)
#define BE16_TO_CPU(x) x
#define BE32_TO_CPU(x) x
#define CPU_TO_LE16(x) SWAPENDIAN_16(x)
#define CPU_TO_LE32(x) SWAPENDIAN_32(x)
#define CPU_TO_BE16(x) x
#define CPU_TO_BE32(x) x
#elif !defined(le16_to_cpu)
/** \name Run-time endianness conversion */
//@{
/** Performs a conversion between a Little Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref LE16_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define le16_to_cpu(x) x
/** Performs a conversion between a Little Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref LE32_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define le32_to_cpu(x) x
/** Performs a conversion between a Big Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref BE16_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define be16_to_cpu(x) SwapEndian_16(x)
/** Performs a conversion between a Big Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref BE32_TO_CPU instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define be32_to_cpu(x) SwapEndian_32(x)
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_LE16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_le16(x) x
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_LE32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_le32(x) x
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_BE16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_be16(x) SwapEndian_16(x)
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for run-time conversion of data - for compile-time endianness
* conversion, use \ref CPU_TO_BE32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define cpu_to_be32(x) SwapEndian_32(x)
//@}
/** \name Compile-time endianness conversion */
//@{
/** Performs a conversion between a Little Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run time endianness
* conversion, use \ref le16_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define LE16_TO_CPU(x) x
/** Performs a conversion between a Little Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run time endianness
* conversion, use \ref le32_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define LE32_TO_CPU(x) x
/** Performs a conversion between a Big Endian encoded 16-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref be16_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define BE16_TO_CPU(x) SWAPENDIAN_16(x)
/** Performs a conversion between a Big Endian encoded 32-bit piece of data and the
* Endianness of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref be32_to_cpu instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define BE32_TO_CPU(x) SWAPENDIAN_32(x)
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_le16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_LE16(x) x
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Little Endian format regardless of the currently selected CPU architecture.
*
* On little endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_le32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_LE32(x) x
/** Performs a conversion on a natively encoded 16-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_be16 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_BE16(x) SWAPENDIAN_16(x)
/** Performs a conversion on a natively encoded 32-bit piece of data to ensure that it
* is in Big Endian format regardless of the currently selected CPU architecture.
*
* On big endian architectures, this macro does nothing.
*
* \note This macro is designed for compile-time conversion of data - for run-time endianness
* conversion, use \ref cpu_to_be32 instead.
*
* \ingroup Group_EndianConversion
*
* \param[in] x Data to perform the endianness conversion on.
*
* \return Endian corrected version of the input value.
*/
#define CPU_TO_BE32(x) SWAPENDIAN_32(x)
//! @}
#endif
/* Inline Functions: */
/** Function to reverse the byte ordering of the individual bytes in a 16 bit value.
*
* \ingroup Group_ByteSwapping
*
* \param[in] Word Word of data whose bytes are to be swapped.
*/
static inline uint16_t SwapEndian_16(const uint16_t Word) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
static inline uint16_t SwapEndian_16(const uint16_t Word)
{
uint8_t Temp;
union
{
uint16_t Word;
uint8_t Bytes[2];
} Data;
Data.Word = Word;
Temp = Data.Bytes[0];
Data.Bytes[0] = Data.Bytes[1];
Data.Bytes[1] = Temp;
return Data.Word;
}
/** Function to reverse the byte ordering of the individual bytes in a 32 bit value.
*
* \ingroup Group_ByteSwapping
*
* \param[in] DWord Double word of data whose bytes are to be swapped.
*/
static inline uint32_t SwapEndian_32(const uint32_t DWord) ATTR_WARN_UNUSED_RESULT ATTR_CONST;
static inline uint32_t SwapEndian_32(const uint32_t DWord)
{
uint8_t Temp;
union
{
uint32_t DWord;
uint8_t Bytes[4];
} Data;
Data.DWord = DWord;
Temp = Data.Bytes[0];
Data.Bytes[0] = Data.Bytes[3];
Data.Bytes[3] = Temp;
Temp = Data.Bytes[1];
Data.Bytes[1] = Data.Bytes[2];
Data.Bytes[2] = Temp;
return Data.DWord;
}
/** Function to reverse the byte ordering of the individual bytes in a n byte value.
*
* \ingroup Group_ByteSwapping
*
* \param[in,out] Data Pointer to a number containing an even number of bytes to be reversed.
* \param[in] Length Length of the data in bytes.
*/
static inline void SwapEndian_n(void* const Data,
uint8_t Length) ATTR_NON_NULL_PTR_ARG(1);
static inline void SwapEndian_n(void* const Data,
uint8_t Length)
{
uint8_t* CurrDataPos = (uint8_t*)Data;
while (Length > 1)
{
uint8_t Temp = *CurrDataPos;
*CurrDataPos = *(CurrDataPos + Length - 1);
*(CurrDataPos + Length - 1) = Temp;
CurrDataPos++;
Length -= 2;
}
}
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */