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https://github.com/bulletphysics/bullet3
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60 lines
907 B
C
60 lines
907 B
C
#ifndef B3_SWAP_UTILS_H
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#define B3_SWAP_UTILS_H
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inline void b3Swap16(unsigned char *ptr)
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{
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unsigned char val;
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// Swap 1st and 2nd bytes
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val = *(ptr);
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*(ptr) = *(ptr+1);
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*(ptr+1) = val;
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}
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inline void b3Swap32(unsigned char *ptr)
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{
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unsigned char val;
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// Swap 1st and 4th bytes
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val = *(ptr);
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*(ptr) = *(ptr+3);
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*(ptr+3) = val;
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//Swap 2nd and 3rd bytes
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ptr += 1;
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val = *(ptr);
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*(ptr) = *(ptr+1);
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*(ptr+1) = val;
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}
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inline void b3Swap64(unsigned char *ptr)
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{
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unsigned char val;
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// Swap 1st and 8th bytes
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val = *(ptr);
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*(ptr) = *(ptr + 7);
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*(ptr + 7) = val;
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// Swap 2nd and 7th bytes
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ptr += 1;
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val = *(ptr);
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*(ptr) = *(ptr + 5);
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*(ptr + 5) = val;
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// Swap 3rd and 6th bytes
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ptr += 1;
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val = *(ptr);
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*(ptr) = *(ptr + 3);
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*(ptr + 3) = val;
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// Swap 4th and 5th bytes
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ptr += 1;
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val = *(ptr);
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*(ptr) = *(ptr + 1);
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*(ptr + 1) = val;
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}
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#endif //B3_SWAP_UTILS_H
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