FFLiSwapEndian.h

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#ifndef FFLI_SWAP_ENDIAN_H_
#define FFLI_SWAP_ENDIAN_H_
 
#include <nn/ffl/types.h>
 
#include <algorithm>
 
enum FFLiSwapEndianType
{
    FFLI_SWAP_ENDIAN_TYPE_U8    = 0,
    FFLI_SWAP_ENDIAN_TYPE_U16   = 1,
    FFLI_SWAP_ENDIAN_TYPE_U32   = 2
};
 
struct FFLiSwapEndianDesc
{
    FFLiSwapEndianType  type;
    u32                 size;
};
NN_STATIC_ASSERT(sizeof(FFLiSwapEndianDesc) == 8);
 
u32 FFLiSwapEndianGroup(void* ptr, const FFLiSwapEndianDesc* pDesc, u32 num);
 
#ifdef __ghs__
#pragma ghs nowarning 186
#endif
 
template <typename T>
T FFLiSwapEndianImpl(T value)
{
    const u32 count = sizeof(T);
    NN_STATIC_ASSERT(count == 1 || count % 2 == 0);
    const u32 count_2 = count / 2;
 
    union {
        T   value;
        u8  data[count];
    } value_ = { .value = value };
 
    for (u32 i = 0; i < count_2; i++)
        std::swap(value_.data[i], value_.data[count - 1 - i]);
 
    return value_.value;
}
 
#ifdef __ghs__
#pragma ghs endnowarning
#endif
 
template <typename T>
void FFLiSwapEndianArrayImpl(T* pArray, u32 size)
{
    for (u32 i = 0; i < size; i++)
        pArray[i] = FFLiSwapEndianImpl<T>(pArray[i]);
}
 
#endif // FFLI_SWAP_ENDIAN_H_