Package com.google.code.yanf4j.buffer

Examples of com.google.code.yanf4j.buffer.IoBuffer.position()

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    public void testPutPrefixedStringWithPadding() throws Exception {
        CharsetEncoder encoder = Charset.forName("ISO-8859-1").newEncoder();
        IoBuffer buf = IoBuffer.allocate(16).sweep().setAutoExpand(true);

        buf.putPrefixedString("A", 1, 2, (byte) 32, encoder);
        assertEquals(3, buf.position());
        assertEquals(2, buf.get(0));
        assertEquals('A', buf.get(1));
        assertEquals(' ', buf.get(2));

        buf.sweep();
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        assertEquals('A', buf.get(1));
        assertEquals(' ', buf.get(2));

        buf.sweep();
        buf.putPrefixedString("A", 1, 4, (byte) 32, encoder);
        assertEquals(5, buf.position());
        assertEquals(4, buf.get(0));
        assertEquals('A', buf.get(1));
        assertEquals(' ', buf.get(2));
        assertEquals(' ', buf.get(3));
        assertEquals(' ', buf.get(4));
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    public void testSweepWithZeros() throws Exception {
        IoBuffer buf = IoBuffer.allocate(4);
        buf.putInt(0xdeadbeef);
        buf.clear();
        assertEquals(0xdeadbeef, buf.getInt());
        assertEquals(4, buf.position());
        assertEquals(4, buf.limit());

        buf.sweep();
        assertEquals(0, buf.position());
        assertEquals(4, buf.limit());
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        assertEquals(0xdeadbeef, buf.getInt());
        assertEquals(4, buf.position());
        assertEquals(4, buf.limit());

        buf.sweep();
        assertEquals(0, buf.position());
        assertEquals(4, buf.limit());
        assertEquals(0x0, buf.getInt());
    }

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    public void testSweepNonZeros() throws Exception {
        IoBuffer buf = IoBuffer.allocate(4);
        buf.putInt(0xdeadbeef);
        buf.clear();
        assertEquals(0xdeadbeef, buf.getInt());
        assertEquals(4, buf.position());
        assertEquals(4, buf.limit());

        buf.sweep((byte) 0x45);
        assertEquals(0, buf.position());
        assertEquals(4, buf.limit());
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        assertEquals(0xdeadbeef, buf.getInt());
        assertEquals(4, buf.position());
        assertEquals(4, buf.limit());

        buf.sweep((byte) 0x45);
        assertEquals(0, buf.position());
        assertEquals(4, buf.limit());
        assertEquals(0x45454545, buf.getInt());
    }

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        ByteBuffer nioBuf = ByteBuffer.allocate(10);
        nioBuf.position(3);
        nioBuf.limit(7);

        IoBuffer buf = IoBuffer.wrap(nioBuf);
        assertEquals(3, buf.position());
        assertEquals(7, buf.limit());
        assertEquals(10, buf.capacity());
    }

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    @Test
    public void testWrapSubArray() throws Exception {
        byte[] array = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };

        IoBuffer buf = IoBuffer.wrap(array, 3, 4);
        assertEquals(3, buf.position());
        assertEquals(7, buf.limit());
        assertEquals(10, buf.capacity());

        buf.clear();
        assertEquals(0, buf.position());
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        assertEquals(3, buf.position());
        assertEquals(7, buf.limit());
        assertEquals(10, buf.capacity());

        buf.clear();
        assertEquals(0, buf.position());
        assertEquals(10, buf.limit());
        assertEquals(10, buf.capacity());
    }

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        original = IoBuffer.allocate(16).sweep();
        original.position(4);
        original.limit(10);
        duplicate = original.duplicate();
        original.put(4, (byte) 127);
        assertEquals(4, duplicate.position());
        assertEquals(10, duplicate.limit());
        assertEquals(16, duplicate.capacity());
        assertNotSame(original.buf(), duplicate.buf());
        assertSame(original.buf().array(), duplicate.buf().array());
        assertEquals(127, duplicate.get(4));
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