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android_calculator-10: i^3

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This commit is contained in:
serso 2011-11-13 13:05:49 +04:00
parent 8e0f3dfd9a
commit 02a075768d
2 changed files with 60 additions and 20 deletions
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55
src/main/java/org/solovyev/android/calculator/jscl/FromJsclNumericTextProcessor.java
View File

@ -12,6 +12,7 @@ import org.solovyev.android.calculator.math.MathType;
import org.solovyev.android.calculator.model.CalculatorEngine;
import org.solovyev.android.calculator.model.ParseException;
import org.solovyev.android.calculator.model.TextProcessor;
import org.solovyev.common.utils.StringUtils;
/**
* User: serso
@ -47,40 +48,54 @@ class FromJsclNumericTextProcessor implements TextProcessor<String> {
return result;
}
private String format(@NotNull String value) {
private String format(@NotNull String value) throws java.lang.NumberFormatException {
return CalculatorEngine.instance.format(Double.valueOf(value));
}
protected String createResultForComplexNumber(@NotNull final String s) {
final Complex complex = new Complex();
String result = "";
// may be it's just complex number
int plusIndex = s.lastIndexOf("+");
if (plusIndex >= 0) {
complex.setReal(format(s.substring(0, plusIndex)));
result += complex.getReal();
result += "+";
} else {
plusIndex = s.lastIndexOf("-");
if (plusIndex >= 0) {
complex.setReal(format(s.substring(0, plusIndex)));
result += complex.getReal();
result += "-";
}
}
final StringBuilder result = new StringBuilder();
// may be it's just complex number
int signIndex = tryRealPart(s, complex, result, "+");
if (signIndex < 0) {
signIndex = tryRealPart(s, complex, result, "-");
}
int multiplyIndex = s.indexOf("*");
if (multiplyIndex >= 0) {
complex.setImaginary(format(s.substring(plusIndex >= 0 ? plusIndex + 1 : 0, multiplyIndex)));
result += complex.getImaginary();
complex.setImaginary(format(s.substring(signIndex >= 0 ? signIndex + 1 : 0, multiplyIndex)));
result.append(complex.getImaginary());
}
result += MathType.IMAGINARY_NUMBER;
result.append(MathType.IMAGINARY_NUMBER);
return result;
return result.toString();
}
private int tryRealPart(@NotNull String s,
@NotNull Complex complex,
@NotNull StringBuilder result,
@NotNull String sign) {
int index = s.lastIndexOf(sign);
if (index >= 0) {
final String substring = s.substring(0, index);
if (!StringUtils.isEmpty(substring)) {
try {
complex.setReal(format(substring));
result.append(complex.getReal());
} catch (NumberFormatException e) {
// do nothing
}
}
result.append(sign);
}
return index;
}
private class Complex {

25
src/test/java/org/solovyev/android/calculator/model/CalculatorEngineTest.java
View File

@ -178,6 +178,31 @@ public class CalculatorEngineTest {
}
@Test
public void testI() throws ParseException {
final CalculatorEngine cm = CalculatorEngine.instance;
Assert.assertEquals("-i", cm.evaluate(JsclOperation.numeric, "i^3").getResult());
for (int i = 0; i < 1000; i++) {
double real = (Math.random()-0.5) * 1000;
double imag = (Math.random()-0.5) * 1000;
int exp = (int)(Math.random() * 10);
final StringBuilder sb = new StringBuilder();
sb.append(real);
if ( imag > 0 ) {
sb.append("+");
}
sb.append(imag);
sb.append("^").append(exp);
try {
cm.evaluate(JsclOperation.numeric, sb.toString()).getResult();
} catch (Throwable e) {
fail(sb.toString());
}
}
}
@Test
public void testEmptyFunction() throws Exception {
final CalculatorEngine cm = CalculatorEngine.instance;