Examples with BigInteger java.math.BigInteger used on opensource projects

Example 6 with BigInteger

use of java.math.BigInteger in project groovy by apache.

the class ObjectRangeTest method testSize.

public void testSize() {
    Range r = createRange(0, 10);
    assertEquals("Size of " + r, 11, r.size());
    r = createRange(0, 1);
    assertEquals("Size of " + r, 2, r.size());
    r = createRange(1, 0);
    assertEquals("Size of " + r, 2, r.size());
    r = createRange(0, 0);
    assertEquals("Size of " + r, 1, r.size());
    r = createRange(new BigDecimal("2.1"), new BigDecimal("10.0"));
    assertEquals("Size of " + r, 8, r.size());
    r = createRange(new BigDecimal("10"), new BigDecimal("2.1"));
    assertEquals("Size of " + r, 8, r.size());
    r = createRange("a", "d");
    assertEquals("Size of " + r, 4, r.size());
    r = createRange("d", "a");
    assertEquals("Size of " + r, 4, r.size());
    r = createRange("aa1", "aa4");
    assertEquals("Size of " + r, 4, r.size());
    r = createRange("aa4", "aa1");
    assertEquals("Size of " + r, 4, r.size());
    r = createRange('7', ';');
    assertEquals(5, r.size());
    // '7', '8', '9', ':', ';'
    Range mixed = createRange('7', ';');
    assertEquals(5, mixed.size());
    mixed = createRange('7', 59.5);
    assertEquals(5, mixed.size());
    mixed = createRange('7', 59);
    assertEquals(5, mixed.size());
    mixed = createRange('7', new BigInteger("59"));
    assertEquals(5, mixed.size());
    mixed = createRange('7', new BigDecimal("59.5"));
    assertEquals(5, mixed.size());
    // integer overflow cases
    assertEquals(Integer.MAX_VALUE, new ObjectRange(0L, Integer.MAX_VALUE).size());
    assertEquals(Integer.MAX_VALUE, new ObjectRange(Long.MIN_VALUE, Long.MAX_VALUE).size());
    assertEquals(Integer.MAX_VALUE, new ObjectRange(new BigInteger("-10"), new BigInteger(Long.toString((long) Integer.MAX_VALUE) + 1L)).size());
}

Example 7 with BigInteger

use of java.math.BigInteger in project hadoop by apache.

the class TestCryptoCodec method calculateRef.

private static BigInteger calculateRef(byte[] initIV, long counter) {
    byte[] cb = Longs.toByteArray(counter);
    BigInteger bi = new BigInteger(1, initIV);
    return bi.add(new BigInteger(1, cb));
}

Example 8 with BigInteger

use of java.math.BigInteger in project groovy by apache.

the class NumberRange method calcSize.

void calcSize(Comparable from, Comparable to, Number stepSize) {
    int tempsize = 0;
    boolean shortcut = false;
    if (isIntegral(stepSize)) {
        if ((from instanceof Integer || from instanceof Long) && (to instanceof Integer || to instanceof Long)) {
            // let's fast calculate the size
            final BigInteger fromNum = new BigInteger(from.toString());
            final BigInteger toTemp = new BigInteger(to.toString());
            final BigInteger toNum = inclusive ? toTemp : toTemp.subtract(BigInteger.ONE);
            final BigInteger sizeNum = new BigDecimal(toNum.subtract(fromNum)).divide(new BigDecimal(stepSize.longValue()), BigDecimal.ROUND_DOWN).toBigInteger().add(BigInteger.ONE);
            tempsize = sizeNum.compareTo(BigInteger.valueOf(Integer.MAX_VALUE)) == -1 ? sizeNum.intValue() : Integer.MAX_VALUE;
            shortcut = true;
        } else if (((from instanceof BigDecimal || from instanceof BigInteger) && to instanceof Number) || ((to instanceof BigDecimal || to instanceof BigInteger) && from instanceof Number)) {
            // let's fast calculate the size
            final BigDecimal fromNum = new BigDecimal(from.toString());
            final BigDecimal toTemp = new BigDecimal(to.toString());
            final BigDecimal toNum = inclusive ? toTemp : toTemp.subtract(new BigDecimal("1.0"));
            final BigInteger sizeNum = toNum.subtract(fromNum).divide(new BigDecimal(stepSize.longValue()), BigDecimal.ROUND_DOWN).toBigInteger().add(BigInteger.ONE);
            tempsize = sizeNum.compareTo(BigInteger.valueOf(Integer.MAX_VALUE)) == -1 ? sizeNum.intValue() : Integer.MAX_VALUE;
            shortcut = true;
        }
    }
    if (!shortcut) {
        // let's brute-force calculate the size by iterating start to end
        final Iterator iter = new StepIterator(this, stepSize);
        while (iter.hasNext()) {
            tempsize++;
            // integer overflow
            if (tempsize < 0) {
                break;
            }
            iter.next();
        }
        // integer overflow
        if (tempsize < 0) {
            tempsize = Integer.MAX_VALUE;
        }
    }
    size = tempsize;
}

Example 9 with BigInteger

use of java.math.BigInteger in project groovy by apache.

the class Transformation method extract.

public int extract(int j) {
    BigInteger bigj = BigInteger.valueOf(j);
    BigInteger numerator = (q.multiply(bigj)).add(r);
    BigInteger denominator = (s.multiply(bigj)).add(t);
    return (numerator.divide(denominator)).intValue();
}

Example 10 with BigInteger

use of java.math.BigInteger in project groovy by apache.

the class Numbers method parseInteger.

/**
    *  Builds a Number from the given integer descriptor.  Creates the narrowest
    *  type possible, or a specific type, if specified.
    *
    *  @param  reportNode at node for error reporting in the parser
    *  @param  text literal text to parse
    *  @return instantiated Number object
    *  @throws NumberFormatException if the number does not fit within the type
    *          requested by the type specifier suffix (invalid numbers don't make
    *          it here)
    */
public static Number parseInteger(AST reportNode, String text) {
    // remove place holder underscore before starting
    text = text.replace("_", "");
    char c = ' ';
    int length = text.length();
    //
    // Strip off the sign, if present
    boolean negative = false;
    if ((c = text.charAt(0)) == '-' || c == '+') {
        negative = (c == '-');
        text = text.substring(1, length);
        length -= 1;
    }
    //
    // Determine radix (default is 10).
    int radix = 10;
    if (text.charAt(0) == '0' && length > 1) {
        c = text.charAt(1);
        if (c == 'X' || c == 'x') {
            radix = 16;
            text = text.substring(2, length);
            length -= 2;
        } else if (c == 'B' || c == 'b') {
            radix = 2;
            text = text.substring(2, length);
            length -= 2;
        } else {
            radix = 8;
        }
    }
    //
    // Strip off any type specifier and convert it to lower
    // case, if present.
    // pick best fit
    char type = 'x';
    if (isNumericTypeSpecifier(text.charAt(length - 1), false)) {
        type = Character.toLowerCase(text.charAt(length - 1));
        text = text.substring(0, length - 1);
        length -= 1;
    }
    if (negative) {
        text = "-" + text;
    }
    //
    // Build the specified type or, if no type was specified, the
    // smallest type in which the number will fit.
    BigInteger value = new BigInteger(text, radix);
    switch(type) {
        case 'i':
            if (radix == 10 && reportNode != null && (value.compareTo(MAX_INTEGER) > 0 || value.compareTo(MIN_INTEGER) < 0)) {
                throw new ASTRuntimeException(reportNode, "Number of value " + value + " does not fit in the range of int, but int was enforced.");
            } else {
                return Integer.valueOf(value.intValue());
            }
        case 'l':
            if (radix == 10 && reportNode != null && (value.compareTo(MAX_LONG) > 0 || value.compareTo(MIN_LONG) < 0)) {
                throw new ASTRuntimeException(reportNode, "Number of value " + value + " does not fit in the range of long, but long was enforced.");
            } else {
                return new Long(value.longValue());
            }
        case 'g':
            return value;
        default:
            // of Integer, Long, and BigInteger.
            if (value.compareTo(MAX_INTEGER) <= 0 && value.compareTo(MIN_INTEGER) >= 0) {
                return Integer.valueOf(value.intValue());
            } else if (value.compareTo(MAX_LONG) <= 0 && value.compareTo(MIN_LONG) >= 0) {
                return new Long(value.longValue());
            }
            return value;
    }
}