#ifndef _H_MEMUTILS
#define _H_MEMUTILS
#include <security_utilities/utilities.h>
#include <sys/types.h>
#include <stdlib.h>
#include <algorithm>
namespace Security {
namespace LowLevelMemoryUtilities {
static const size_t systemAlignment = 4;
template <class T>
inline int alignof_template() { struct { char c; T t; } s; return sizeof(s) - sizeof(T); }
template <class Type, class Field>
inline size_t fieldOffsetOf(Field (Type::*field))
{
Type *object = 0; return uintptr_t(&(object->*field)) - uintptr_t(object);
}
inline size_t alignUp(size_t size, size_t alignment = systemAlignment)
{
return ((size - 1) & ~(alignment - 1)) + alignment;
}
inline void *alignUp(void *p, size_t alignment = systemAlignment)
{
return reinterpret_cast<void *>(alignUp(uintptr_t(p), alignment));
}
inline const void *alignUp(const void *p, size_t alignment = systemAlignment)
{
return reinterpret_cast<const void *>(alignUp(uintptr_t(p), alignment));
}
template <class T>
inline const T *increment(const void *p, ptrdiff_t offset)
{ return reinterpret_cast<const T *>(uintptr_t(p) + offset); }
template <class T>
inline T *increment(void *p, ptrdiff_t offset)
{ return reinterpret_cast<T *>(uintptr_t(p) + offset); }
inline const void *increment(const void *p, ptrdiff_t offset)
{ return increment<const void>(p, offset); }
inline void *increment(void *p, ptrdiff_t offset)
{ return increment<void>(p, offset); }
template <class T>
inline const T *increment(const void *p, ptrdiff_t offset, size_t alignment)
{ return increment<const T>(alignUp(p, alignment), offset); }
template <class T>
inline T *increment(void *p, ptrdiff_t offset, size_t alignment)
{ return increment<T>(alignUp(p, alignment), offset); }
inline const void *increment(const void *p, ptrdiff_t offset, size_t alignment)
{ return increment<const void>(p, offset, alignment); }
inline void *increment(void *p, ptrdiff_t offset, size_t alignment)
{ return increment<void>(p, offset, alignment); }
inline ptrdiff_t difference(const void *p1, const void *p2)
{ return uintptr_t(p1) - uintptr_t(p2); }
} }
#endif //_H_MEMUTILS