26 lines
1.2 KiB
Java
26 lines
1.2 KiB
Java
package jxl.biff;
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public class DoubleHelper {
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public static double getIEEEDouble(byte[] data, int pos) {
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int num1 = IntegerHelper.getInt(data[pos], data[pos + 1], data[pos + 2], data[pos + 3]);
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int num2 = IntegerHelper.getInt(data[pos + 4], data[pos + 5], data[pos + 6], data[pos + 7]);
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boolean negative = ((num2 & Integer.MIN_VALUE) != 0);
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long val = (long)(num2 & Integer.MAX_VALUE) * 4294967296L + ((num1 < 0) ? (4294967296L + (long)num1) : (long)num1);
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double value = Double.longBitsToDouble(val);
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if (negative)
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value = -value;
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return value;
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}
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public static void getIEEEBytes(double d, byte[] target, int pos) {
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long val = Double.doubleToLongBits(d);
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target[pos] = (byte)(int)(val & 0xFFL);
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target[pos + 1] = (byte)(int)((val & 0xFF00L) >> 8L);
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target[pos + 2] = (byte)(int)((val & 0xFF0000L) >> 16L);
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target[pos + 3] = (byte)(int)((val & 0xFFFFFFFFFF000000L) >> 24L);
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target[pos + 4] = (byte)(int)((val & 0xFF00000000L) >> 32L);
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target[pos + 5] = (byte)(int)((val & 0xFF0000000000L) >> 40L);
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target[pos + 6] = (byte)(int)((val & 0xFF000000000000L) >> 48L);
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target[pos + 7] = (byte)(int)((val & 0xFF00000000000000L) >> 56L);
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}
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}
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