70 lines
1.3 KiB
Text
70 lines
1.3 KiB
Text
T BitWriter
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File out
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accumulator = 0
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bcount = 0
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F (fname)
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.out = File(fname, ‘w’)
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F _writebit(bit)
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I .bcount == 8
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.flush()
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I bit > 0
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.accumulator [|]= 1 << (7 - .bcount)
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.bcount++
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F writebits(bits, =n)
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L n > 0
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._writebit(bits [&] 1 << (n - 1))
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n--
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F flush()
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.out.write_bytes([Byte(.accumulator)])
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.accumulator = 0
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.bcount = 0
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F close()
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.flush()
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.out.close()
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T BitReader
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File input
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accumulator = 0
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bcount = 0
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read = 0
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F (fname)
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.input = File(fname, ‘r’)
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F _readbit()
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I .bcount == 0
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V a = .input.read_bytes(1)
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I !a.empty
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.accumulator = a[0]
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.bcount = 8
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.read = a.len
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V rv = (.accumulator [&] (1 << (.bcount - 1))) >> (.bcount - 1)
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.bcount--
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R rv
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F readbits(=n)
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V v = 0
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L n > 0
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v = (v << 1) [|] ._readbit()
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n--
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R v
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V writer = BitWriter(‘bitio_test.dat’)
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V chars = ‘12345abcde’
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L(ch) chars
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writer.writebits(ch.code, 7)
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writer.close()
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V reader = BitReader(‘bitio_test.dat’)
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[Char] charsa
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L
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V x = reader.readbits(7)
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I reader.read == 0
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L.break
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charsa.append(Char(code' x))
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print(charsa.join(‘’))
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