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Documentation for Endiannes 

Former-commit-id: e45c5026b84aa8b354e29d760eff56d13f2dc745
This commit is contained in:
Gawaboumga 2016-02-21 14:41:41 +01:00
parent 0a4381a95b
commit 61542b59d6
2 changed files with 17 additions and 3 deletions
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4
include/Nazara/Core/Endianness.hpp
View File

@ -11,12 +11,12 @@
#include <Nazara/Core/Enums.hpp> #include <Nazara/Core/Enums.hpp>
#if !defined(NAZARA_BIG_ENDIAN) && !defined(NAZARA_LITTLE_ENDIAN) #if !defined(NAZARA_BIG_ENDIAN) && !defined(NAZARA_LITTLE_ENDIAN)
// Détection automatique selon les macros du compilateur // Automatic detection following macroes of compiler
#if defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || (defined(__MIPS__) && defined(__MISPEB__)) || \ #if defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || (defined(__MIPS__) && defined(__MISPEB__)) || \
defined(__ppc__) || defined(__POWERPC__) || defined(_M_PPC) || defined(__sparc__) || defined(__hppa__) defined(__ppc__) || defined(__POWERPC__) || defined(_M_PPC) || defined(__sparc__) || defined(__hppa__)
#define NAZARA_BIG_ENDIAN #define NAZARA_BIG_ENDIAN
#elif defined(__i386__) || defined(__i386) || defined(__X86__) || defined (__x86_64) || defined(_M_I86) || \ #elif defined(__i386__) || defined(__i386) || defined(__X86__) || defined (__x86_64) || defined(_M_I86) || \
defined(_M_IX86) || defined(_M_X64) defined(_M_IX86) || defined(_M_X64)
#define NAZARA_LITTLE_ENDIAN #define NAZARA_LITTLE_ENDIAN
#else #else
#error Failed to identify endianness, you must define either NAZARA_BIG_ENDIAN or NAZARA_LITTLE_ENDIAN #error Failed to identify endianness, you must define either NAZARA_BIG_ENDIAN or NAZARA_LITTLE_ENDIAN

16
include/Nazara/Core/Endianness.inl
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@ -7,6 +7,11 @@
namespace Nz namespace Nz
{ {
/*!
* \brief Gets the platform endianness
* \return Type of the endianness
*/
inline constexpr Endianness GetPlatformEndianness() inline constexpr Endianness GetPlatformEndianness()
{ {
#if defined(NAZARA_BIG_ENDIAN) #if defined(NAZARA_BIG_ENDIAN)
@ -16,11 +21,20 @@ namespace Nz
#endif #endif
} }
/*!
* \brief Swaps the byte for endianness operations
*
* \param buffer Raw memory
* \param size Size to change endianness
*
* \remark If size is greather than the preallocated buffer, the behaviour is undefined
*/
inline void SwapBytes(void* buffer, unsigned int size) inline void SwapBytes(void* buffer, unsigned int size)
{ {
UInt8* bytes = reinterpret_cast<UInt8*>(buffer); UInt8* bytes = reinterpret_cast<UInt8*>(buffer);
unsigned int i = 0; unsigned int i = 0;
unsigned int j = size-1; unsigned int j = size - 1;
while (i < j) while (i < j)
std::swap(bytes[i++], bytes[j--]); std::swap(bytes[i++], bytes[j--]);