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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,136 @@ | ||
| package appeng.util.calculators; | ||
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| public class ArithHelper { | ||
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| private static final int DEF_DIV_SCALE = 16; | ||
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| private ArithHelper() { | ||
| } | ||
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| /** | ||
| * addition | ||
| * | ||
| * @param v1 p1 | ||
| * @param v2 p2 | ||
| * @return sum | ||
| */ | ||
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| public static double add(double v1, double v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1)); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2)); | ||
| return b1.add(b2).doubleValue(); | ||
| } | ||
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| public static double add(String v1, String v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(v1); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(v2); | ||
| return b1.add(b2).doubleValue(); | ||
| } | ||
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| /** | ||
| * subtraction | ||
| * | ||
| * @param v1 p1 | ||
| * @param v2 p2 | ||
| * @return sub | ||
| */ | ||
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| public static double sub(double v1, double v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1)); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2)); | ||
| return b1.subtract(b2).doubleValue(); | ||
| } | ||
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| public static double sub(String v1, String v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(v1); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(v2); | ||
| return b1.subtract(b2).doubleValue(); | ||
| } | ||
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| /** | ||
| * multiplication | ||
| * | ||
| * @param v1 | ||
| * p1 | ||
| * @param v2 | ||
| * p2 | ||
| * @return mul | ||
| */ | ||
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| public static double mul(double v1, double v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1)); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2)); | ||
| return b1.multiply(b2).doubleValue(); | ||
| } | ||
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| public static double mul(String v1, String v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(v1); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(v2); | ||
| return b1.multiply(b2).doubleValue(); | ||
| } | ||
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| /** | ||
| * division. e = 10^-10 | ||
| * | ||
| * @param v1 | ||
| * p1 | ||
| * @param v2 | ||
| * p2 | ||
| * @return div | ||
| */ | ||
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| public static double div(double v1, double v2) { | ||
| return div(v1, v2, DEF_DIV_SCALE); | ||
| } | ||
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| public static double div(String v1, String v2) { | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(v1); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(v2); | ||
| return b1.divide(b2, DEF_DIV_SCALE, java.math.BigDecimal.ROUND_HALF_UP).doubleValue(); | ||
| } | ||
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| /** | ||
| * division. e = 10^-scale | ||
| * | ||
| * @param v1 p1 | ||
| * @param v2 p2 | ||
| * @param scale scale | ||
| * @return div | ||
| */ | ||
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| public static double div(double v1, double v2, int scale) { | ||
| if (scale < 0) { | ||
| throw new IllegalArgumentException("The scale must be a positive integer or zero"); | ||
| } | ||
| java.math.BigDecimal b1 = new java.math.BigDecimal(Double.toString(v1)); | ||
| java.math.BigDecimal b2 = new java.math.BigDecimal(Double.toString(v2)); | ||
| return b1.divide(b2, scale, java.math.BigDecimal.ROUND_HALF_UP).doubleValue(); | ||
| } | ||
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| /** | ||
| * rounding | ||
| * | ||
| * @param v p | ||
| * @param scale scale | ||
| * @return result | ||
| */ | ||
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| public static double round(double v, int scale) { | ||
| if (scale < 0) { | ||
| throw new IllegalArgumentException("The scale must be a positive integer or zero"); | ||
| } | ||
| java.math.BigDecimal b = new java.math.BigDecimal(Double.toString(v)); | ||
| java.math.BigDecimal one = new java.math.BigDecimal("1"); | ||
| return b.divide(one, scale, java.math.BigDecimal.ROUND_HALF_UP).doubleValue(); | ||
| } | ||
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| public static double round(String v, int scale) { | ||
| if (scale < 0) { | ||
| throw new IllegalArgumentException("The scale must be a positive integer or zero"); | ||
| } | ||
| java.math.BigDecimal b = new java.math.BigDecimal(v); | ||
| java.math.BigDecimal one = new java.math.BigDecimal("1"); | ||
| return b.divide(one, scale, java.math.BigDecimal.ROUND_HALF_UP).doubleValue(); | ||
| } | ||
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| } |
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