47 lines
946 B
C++
47 lines
946 B
C++
#include "endian.h"
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using namespace base;
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//----------------------------------------------------------------
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bool
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base::test_bit_le(void const *bits, unsigned b)
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{
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__le64 const *w = reinterpret_cast<__le64 const *>(bits);
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w += b / 64;
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uint64_t v = to_cpu<uint64_t>(*w);
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uint64_t mask = 1;
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mask = mask << (b % 64);
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return (v & mask) ? true : false;
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}
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void
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base::set_bit_le(void *bits, unsigned b)
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{
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__le64 *w = reinterpret_cast<__le64 *>(bits);
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w += b / 64;
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uint64_t v = to_cpu<uint64_t>(*w);
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uint64_t mask = 1;
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mask = mask << (b % 64);
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v |= mask;
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*w = to_disk<__le64>(v);
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}
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void
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base::clear_bit_le(void *bits, unsigned b)
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{
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__le64 *w = reinterpret_cast<__le64 *>(bits);
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w += b / 64;
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uint64_t v = to_cpu<uint64_t>(*w);
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uint64_t mask = 1;
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mask = mask << (b % 64);
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mask = ~mask;
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v &= mask;
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*w = to_disk<__le64>(v);
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}
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//----------------------------------------------------------------
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