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60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
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#ifndef __BYTE_ORDER_H__
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#define __BYTE_ORDER_H__
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// FROM sha2.h:
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/*
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* BYTE_ORDER NOTE:
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*
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* Please make sure that your system defines BYTE_ORDER. If your
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* architecture is little-endian, make sure it also defines
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* LITTLE_ENDIAN and that the two (BYTE_ORDER and LITTLE_ENDIAN) are
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* equivalent.
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*
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* If your system does not define the above, then you can do so by
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* hand like this:
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*
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* #define LITTLE_ENDIAN 1234
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* #define BIG_ENDIAN 4321
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*
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* And for little-endian machines, add:
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*
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* #define BYTE_ORDER LITTLE_ENDIAN
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*
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* Or for big-endian machines:
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*
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* #define BYTE_ORDER BIG_ENDIAN
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*
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* The FreeBSD machine this was written on defines BYTE_ORDER
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* appropriately by including <sys/types.h> (which in turn includes
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* <machine/endian.h> where the appropriate definitions are actually
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* made).
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*/
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#ifndef LITTLE_ENDIAN
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#define LITTLE_ENDIAN 1234
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#define BIG_ENDIAN 4321
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#endif
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#ifndef BYTE_ORDER
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#define BYTE_ORDER LITTLE_ENDIAN
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#endif
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#define REVERSE32(w, x) \
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{ \
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uint32_t tmp = (w); \
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tmp = (tmp >> 16) | (tmp << 16); \
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(x) = ((tmp & 0xff00ff00UL) >> 8) | ((tmp & 0x00ff00ffUL) << 8); \
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}
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#define REVERSE64(w, x) \
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{ \
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uint64_t tmp = (w); \
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tmp = (tmp >> 32) | (tmp << 32); \
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tmp = ((tmp & 0xff00ff00ff00ff00ULL) >> 8) | \
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((tmp & 0x00ff00ff00ff00ffULL) << 8); \
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(x) = ((tmp & 0xffff0000ffff0000ULL) >> 16) | \
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((tmp & 0x0000ffff0000ffffULL) << 16); \
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}
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#endif
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