203 lines
4.1 KiB
C++
203 lines
4.1 KiB
C++
#if !defined(ENDIAN_HPP)
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#define ENDIAN_HPP
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//______________________________________________________________________________
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//
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// endian.hpp
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// Facilitate endian conversions.
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//namespace xxx
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//{
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//--------------------------------------
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inline
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bool big_endian()
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{
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long lTest = 1;
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return (reinterpret_cast<char*>(&lTest)[0] == 0);
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}
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//--------------------------------------
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inline
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short swap_endian(short i16)
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{
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return i16 << 8 & 0xff00
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| i16 >> 8 & 0x00ff;
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}
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//--------------------------------------
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inline
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unsigned short swap_endian(unsigned short ui16)
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{
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return ui16 << 8 & 0xff00
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| ui16 >> 8 & 0x00ff;
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}
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//--------------------------------------
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inline
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unsigned int swap_endian(unsigned int i32)
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{
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return i32 << 24 & 0xff000000
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| i32 << 8 & 0x00ff0000
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| i32 >> 8 & 0x0000ff00
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| i32 >> 24 & 0x000000ff;
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}
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//--------------------------------------
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inline
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int swap_endian(int ui32)
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{
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return ui32 << 24 & 0xff000000
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| ui32 << 8 & 0x00ff0000
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| ui32 >> 8 & 0x0000ff00
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| ui32 >> 24 & 0x000000ff;
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}
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//--------------------------------------
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inline
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short big_endian(short i16Native)
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{
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if (big_endian())
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{
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return i16Native;
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}
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return swap_endian(i16Native);
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}
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//--------------------------------------
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inline
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unsigned short big_endian(unsigned short ui16Native)
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{
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if (big_endian())
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{
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return ui16Native;
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}
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return swap_endian(ui16Native);
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}
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//--------------------------------------
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inline
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unsigned int big_endian(unsigned int i32Native)
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{
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if (big_endian())
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{
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return i32Native;
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}
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return swap_endian(i32Native);
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}
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//--------------------------------------
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inline
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int big_endian(int ui32Native)
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{
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if (big_endian())
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{
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return ui32Native;
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}
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return swap_endian(ui32Native);
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}
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//--------------------------------------
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inline
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short little_endian(short i16Native)
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{
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if (!big_endian())
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{
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return i16Native;
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}
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return swap_endian(i16Native);
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}
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//--------------------------------------
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inline
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unsigned short little_endian(unsigned short ui16Native)
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{
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if (!big_endian())
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{
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return ui16Native;
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}
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return swap_endian(ui16Native);
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}
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//--------------------------------------
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inline
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unsigned int little_endian(unsigned int i32Native)
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{
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if (!big_endian())
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{
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return i32Native;
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}
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return swap_endian(i32Native);
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}
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//--------------------------------------
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inline
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int little_endian(int ui32Native)
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{
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if (!big_endian())
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{
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return ui32Native;
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}
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return swap_endian(ui32Native);
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}
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//--------------------------------------
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inline
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short native_endian(short i16, bool bBigEndian)
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{
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if (big_endian() != bBigEndian)
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{
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return swap_endian(i16);
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}
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return i16;
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}
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//--------------------------------------
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inline
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unsigned short native_endian(unsigned short ui16, bool bBigEndian)
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{
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if (big_endian() != bBigEndian)
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{
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return swap_endian(ui16);
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}
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return ui16;
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}
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//--------------------------------------
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inline
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unsigned int native_endian(unsigned int i32, bool bBigEndian)
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{
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if (big_endian() != bBigEndian)
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{
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return swap_endian(i32);
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}
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return i32;
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}
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//--------------------------------------
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inline
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int native_endian(int ui32, bool bBigEndian)
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{
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if (big_endian() != bBigEndian)
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{
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return swap_endian(ui32);
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}
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return ui32;
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}
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//} // namespace xxx
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#endif // ENDIAN_HPP
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