58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
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#ifndef __JAVA_PARSER_BIG_ENDIAN_H
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#define __JAVA_PARSER_BIG_ENDIAN_H
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#include <Types.h>
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#include <cstddef>
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template <typename T>
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class BigEndian
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{
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public:
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ALWAYS_INLINE BigEndian(T val)
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{
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_val = val;
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}
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ALWAYS_INLINE BigEndian()
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{
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}
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ALWAYS_INLINE T ToHostFormat()
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{
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return ToHostFormat(_val);
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}
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ALWAYS_INLINE T ToHostFormat(T val)
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{
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switch (sizeof(T))
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{
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case 1:
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return val;
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case 2:
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return __builtin_bswap16(val);
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case 4:
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return __builtin_bswap32(val);
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case 8:
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return __builtin_bswap64(val);
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// Clang doesn't support __builtin_bswap128, so we fall back to a generic byte-order swap implementation
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#ifndef __clang__
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case 16:
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return __builtin_bswap128(val);
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#endif
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default:
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char *p = reinterpret_cast<char*>(val);
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size_t lo, hi;
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for(lo = 0, hi = sizeof(T) - 1; hi > lo; lo++, hi--)
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{
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char tmp = p[lo];
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p[lo] = p[hi];
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p[hi] = tmp;
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}
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return (T)(*p);
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}
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}
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private:
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T _val;
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};
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#endif
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