Examples of org.axsl.ps.PsInput

org.axsl.ps.PsInput
Interface for objects that wish to be used as input to the PostScript interpreter. This interface is needed because a variety of file types may be used as input to a PostScript interpreter. For example, Type 1 font files are frequently packaged in operating-system-specific wrapper files that must be unwrapped (and sometimes decoded) before they can be consumed by the PostScript interpreter. This interface allows other classes to do that work and pass the results through to the interpreter. Please note that the implementing class is responsible for any buffering of the data for i/o efficiency purposes.

     * @throws PsInterpreterException4a For PostScript errors.
     * @throws PsOperatorException For PostScript operator errors.
     */
    @Test
    public void testFalseOperator01() throws PsInterpreterException4a, PsOperatorException {
        final PsInput input = new PsStringInput("false");
        final PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        assertEquals(1, interpreter.getOperandStack().size());
        final PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsBoolean);

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     * @throws PsOperatorException For PostScript operator errors.
     */
    @Test
    public void testNeg01() throws PsInterpreterException4a, PsOperatorException {
        /* First example from the PSLRM, 2nd Ed. */
        PsInput input = new PsStringInput("4.5 neg");
        PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsReal);
        assertEquals(new BigDecimal("-4.5"), ((PsReal) object).getValue());

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        /* Second example from the PSLRM, 2nd Ed. */
        generalBooleanTest("false not", true);


        /* Third example from the PSLRM, 2nd Ed. */
        final PsInput input = new PsStringInput("52 not");
        final PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        final PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsInteger);
        assertEquals(new BigDecimal(-53), ((PsInteger) object).getValue());

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        /* Fourth example from the PSLRM, 2nd Ed. */
        generalBooleanTest("false false or", false);


        /* Fifth example from the PSLRM, 2nd Ed. */
        final PsInput input = new PsStringInput("17 5 or");
        final PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        final PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsInteger);
        assertEquals(new BigDecimal(21), ((PsInteger) object).getValue());

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        /* Fourth example from the PSLRM, 2nd Ed. */
        generalBooleanTest("false false xor", false);


        /* Fifth example from the PSLRM, 2nd Ed. */
        PsInput input = new PsStringInput("7 3 xor");
        PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsInteger);
        assertEquals(new BigDecimal(4), ((PsInteger) object).getValue());

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        /* Fourth example from the PSLRM, 2nd Ed. */
        generalBooleanTest("false false and", false);


        /* Fifth example from the PSLRM, 2nd Ed. */
        PsInput input = new PsStringInput("99 1 and");
        PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsInteger);
        assertEquals(new BigDecimal(1), ((PsInteger) object).getValue());

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     * @throws PsOperatorException For PostScript operator errors.
     */
    @Test
    public void testCvx01() throws PsInterpreterException4a, PsOperatorException {
        /* First create a name and make sure it is not executable. */
        PsInput input = new PsStringInput("/literal");
        PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsName);
        PsName psName = (PsName) object;

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     * @throws PsInterpreterException4a For PostScript errors.
     * @throws PsOperatorException For PostScript operator errors.
     */
    @Test
    public void testExec01() throws PsInterpreterException4a, PsOperatorException {
        final PsInput input = new PsStringInput("(3 2 add) cvx exec");
        final PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        final PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsInteger);
        final PsInteger psInteger = (PsInteger) object;

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     * @throws PsInterpreterException4a For PostScript errors.
     * @throws PsOperatorException For PostScript operator errors.
     */
    @Test
    public void testExec02() throws PsInterpreterException4a, PsOperatorException {
        final PsInput input = new PsStringInput("3 2 /add exec");
        final PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        assertEquals(3, interpreter.getOperandStack().size());
        /* Test top operand on stack. */
        PsObject object = interpreter.getOperandStack().pop();

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     * @throws PsInterpreterException4a For PostScript errors.
     * @throws PsOperatorException For PostScript operator errors.
     */
    @Test
    public void testExec03() throws PsInterpreterException4a, PsOperatorException {
        final PsInput input = new PsStringInput("3 2 /add cvx exec");
        final PsInterpreter4a interpreter = new PsInterpreter4a(input, null);
        interpreter.process();
        final PsObject object = interpreter.getOperandStack().pop();
        assertTrue(object instanceof PsInteger);
        final PsInteger psInteger = (PsInteger) object;

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