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30 lines
647 B
C++
30 lines
647 B
C++
// Read bits from a bit stream. See BitWriter for writing.
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#ifndef BITSTREAM_HH
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#define BITSTREAM_HH
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#include <cstddef>
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class BitStream
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{
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public:
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BitStream(unsigned char const* p, size_t nbytes);
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void reset();
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unsigned long long getBits(size_t nbits);
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long long getBitsSigned(size_t nbits);
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// Only call getBitsInt when requesting a number of bits that will
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// definitely fit in an int.
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int getBitsInt(size_t nbits);
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void skipToNextByte();
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private:
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unsigned char const* start;
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size_t nbytes;
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unsigned char const* p;
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size_t bit_offset;
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size_t bits_available;
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};
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#endif // BITSTREAM_HH
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