mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 20:39:01 +00:00
a277900369
- Fixed typos on DoubleTest - Restored GetNumberString() as it was on my commit of the end of August
494 lines
16 KiB
C#
494 lines
16 KiB
C#
//#define COSMOSDEBUG
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using System;
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using Cosmos.Debug.Kernel;
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namespace Cosmos.Common
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{
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public static class StringHelper
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{
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private static Debugger mDebugger = new Debugger("Common", "StringHelper");
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internal enum StringComparisonResultEnum
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{
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Less = -1,
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Equal = 0,
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Greater = 1
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}
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public static string GetNumberString(uint aValue)
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{
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mDebugger.SendInternal("StringHelper.GetNumberString(uint)");
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string[] xChars = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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string xResult = string.Empty;
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if (aValue == 0)
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{
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xResult = "0";
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}
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else
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{
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uint xValue = aValue;
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while (xValue > 0)
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{
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uint xValue2 = xValue % 10;
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xResult = string.Concat(xChars[xValue2], xResult);
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xValue /= 10;
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}
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}
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return xResult;
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}
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public static string GetNumberString(int aValue)
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{
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mDebugger.SendInternal("StringHelper.GetNumberString(int)");
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string[] xChars = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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string xResult = string.Empty;
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if (aValue == 0)
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{
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xResult = "0";
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}
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else
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{
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int xValue = aValue;
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if (aValue < 0)
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{
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xValue *= -1;
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}
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while (xValue > 0)
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{
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int xValue2 = xValue % 10;
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xResult = string.Concat(xChars[xValue2], xResult);
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xValue /= 10;
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}
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}
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if (aValue < 0)
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{
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xResult = string.Concat("-", xResult);
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}
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return xResult;
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}
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public static string GetNumberString(ulong aValue)
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{
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mDebugger.SendInternal("StringHelper.GetNumberString(ulong)");
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string[] xChars = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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string xResult = string.Empty;
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if (aValue == 0)
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{
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xResult = "0";
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mDebugger.SendInternal("xResult =");
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mDebugger.SendInternal(xResult);
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}
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else
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{
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ulong xValue = aValue;
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mDebugger.SendInternal("xValue =");
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mDebugger.SendInternal(xValue);
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while (xValue > 0)
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{
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ulong xValue2 = xValue % 10;
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mDebugger.SendInternal("xValue2 =");
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mDebugger.SendInternal(xValue2);
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xResult = string.Concat(xChars[xValue2], xResult);
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mDebugger.SendInternal("xResult =");
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mDebugger.SendInternal(xResult);
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xValue /= 10;
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mDebugger.SendInternal("xValue =");
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mDebugger.SendInternal(xValue);
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}
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}
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mDebugger.SendInternal("xResult =");
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mDebugger.SendInternal(xResult);
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return xResult;
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}
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public static string GetNumberString(long aValue)
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{
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mDebugger.SendInternal("StringHelper.GetNumberString(long)");
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string[] xChars = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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string xResult = string.Empty;
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long xValue = aValue;
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if (aValue == 0)
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{
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xResult = "0";
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mDebugger.SendInternal("xResult =");
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mDebugger.SendInternal(xResult);
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}
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else
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{
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if (aValue < 0)
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{
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xValue *= -1;
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}
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mDebugger.SendInternal("xValue =");
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mDebugger.SendInternal(xValue);
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while (xValue > 0)
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{
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long xValue2 = xValue % 10;
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mDebugger.SendInternal("xValue2 =");
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mDebugger.SendInternal(xValue2);
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xResult = string.Concat(xChars[xValue2], xResult);
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mDebugger.SendInternal("xResult =");
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mDebugger.SendInternal(xResult);
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xValue /= 10;
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mDebugger.SendInternal("xValue =");
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mDebugger.SendInternal(xValue);
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}
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}
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if (aValue < 0)
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{
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xResult = string.Concat("-", xResult);
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}
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mDebugger.SendInternal("xResult =");
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mDebugger.SendInternal(xResult);
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return xResult;
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}
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/*
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* This implementation could only print values which integer part is < ULONG_MAX, the only solution would have been to use BigInteger but then
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* I'd have an analogous problem: to plug BigInteger.ToString() and I don't know how many other things.
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* We will retain this code for now it is OK for debug purposes and big value should be printed in scientific notation to be readable anyway...
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*/
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public static string GetNumberString(float aValue)
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{
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mDebugger.SendInternal("StringHelper.GetNumberString(float)");
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var singleBytes = BitConverter.GetBytes(aValue);
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int hexVal = BitConverter.ToInt32(singleBytes, 0);
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/* Let's extract the parts that compose our single: sign, exponent and mantissa */
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bool isNeg = (hexVal >> 31) != 0;
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int exp = ((hexVal >> 23) & 0xFF);
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ulong mantissa = (ulong)(hexVal & 0x7FFFFF);
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ulong intPart = 0, fracPart = 0;
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/* First we handle the special cases INF, NaN, 0 and denormalized float */
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switch (exp)
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{
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/*
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* INF or NaN?
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*/
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case 0xFF:
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if (mantissa == 0)
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{
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if (isNeg)
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return "-∞";
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else
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return "∞";
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}
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else
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/* It could exist -NaN but this is always printed as NaN */
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return "NaN";
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/* 0 or denormalized float? */
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case 0x00:
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if (mantissa == 0)
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return "0";
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/* Denormalized float have always exp -126 */
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else
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exp = -126;
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break;
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/* Normalized float the exponent is unbiased and the implicit leading one is placed in the mantissa */
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default:
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exp -= 127;
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mantissa |= 0x800000;
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break;
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}
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if (exp >= 23)
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{
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intPart = mantissa << (exp - 23);
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}
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else if (exp >= 0)
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{
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intPart = mantissa >> (23 - exp);
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fracPart = (mantissa << (exp + 1)) & 0xFFFFFF;
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}
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else
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{
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fracPart = (mantissa & 0xFFFFFF) >> (-(exp + 1));
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}
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string result = "";
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if (isNeg)
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{
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result += "-";
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}
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result += intPart.ToString();
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int usedDigits = intPart.ToString().Length;
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if (fracPart == 0)
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{
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return result;
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}
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result += ".";
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if (usedDigits >= 7)
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{
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usedDigits = 6;
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}
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for (int m = usedDigits; m < 7; m++)
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{
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fracPart = (fracPart << 3) + (fracPart << 1);
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char p = (char)((fracPart >> 24) + '0');
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result += p;
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fracPart &= 0xFFFFFF;
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}
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fracPart = (fracPart << 3) + (fracPart << 1);
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char remain = (char)((fracPart >> 24) + '0');
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if ((remain > '5') && (result[result.Length - 1] > '0'))
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{
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char[] answer = result.ToCharArray();
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int digitPos = answer.Length - 1;
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char digit = result[digitPos];
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answer[digitPos] = (char)(digit + 1);
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while (answer[digitPos] > '9')
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{
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answer[digitPos] = '0';
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digitPos--;
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digit = result[digitPos];
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if (digit == '.')
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{
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digitPos--;
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digit = result[digitPos];
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}
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answer[digitPos] = (char)(digit + 1);
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}
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result = new string(answer);
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}
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while (result[result.Length - 1] == '0')
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{
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result = result.Substring(0, result.Length - 1);
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}
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return result;
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}
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/*
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* This implementation could only print values which integer part is < ULONG_MAX, the only solution would have been to use BigInteger but then
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* I'd have an analogous problem: to plug BigInteger.ToString() and I don't know how many other things.
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* We will retain this code for now it is OK for debug purposes and big value should be printed in scientific notation to be readable anyway...
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*/
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public static string GetNumberString(double aValue)
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{
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mDebugger.SendInternal("StringHelper.GetNumberString(double)");
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mDebugger.SendInternal("aValue = ");
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mDebugger.SendInternal(aValue);
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long hexVal = BitConverter.DoubleToInt64Bits(aValue);
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mDebugger.SendInternal("hexVal = ");
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mDebugger.SendInternal(hexVal);
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/* Let's extract the parts that compose our double: sign, exponent and mantissa */
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bool isNeg = (hexVal >> 63) != 0;
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int exp = (int)((hexVal >> 52) & 0x07FF);
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ulong mantissa = (ulong)(hexVal & 0x0FFFFFFFFFFFFF);
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mDebugger.SendInternal("isNeg = ");
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mDebugger.SendInternal(isNeg.ToString());
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mDebugger.SendInternal("exp = ");
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mDebugger.SendInternal(exp);
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mDebugger.SendInternal("mantissa = ");
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mDebugger.SendInternal(mantissa);
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ulong intPart = 0, fracPart = 0;
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/* First we handle the special cases INF, NaN, 0 and denormalized float */
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switch (exp)
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{
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case 0x07ff:
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if (mantissa == 0)
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{
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if (isNeg)
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return "-∞";
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else
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return "∞";
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}
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else
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/* It could exist -NaN but this is always printed as NaN */
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return "NaN";
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/* 0 or denormalized double? */
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case 0x0000:
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if (mantissa == 0)
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return "0";
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/* Denormalized float have always exp -1022 */
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else
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exp = -1022;
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break;
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/* Normalized double the exponent is unbiased and the implicit leading one is placed in the mantissa */
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default:
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exp -= 1023;
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mantissa |= 0x10000000000000;
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break;
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}
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if (exp >= 52)
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{
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intPart = mantissa << (exp - 52);
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}
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else if (exp >= 0)
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{
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intPart = mantissa >> (52 - exp);
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fracPart = (mantissa << (exp + 1)) & 0x1FFFFFFFFFFFFF;
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}
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else
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{
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fracPart = (mantissa & 0x1FFFFFFFFFFFFF) >> (-(exp + 1));
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}
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string result = "";
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if (isNeg)
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{
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result += "-";
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}
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result += intPart.ToString();
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int usedDigits = result.Length;
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if (fracPart == 0)
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{
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return result;
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}
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result += ".";
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if (usedDigits >= 15)
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{
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usedDigits = 14;
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}
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for (int m = usedDigits; m < 15; m++)
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{
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fracPart = (fracPart << 3) + (fracPart << 1);
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char p = (char)(((fracPart >> 53) & 0xFF) + '0');
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result += p;
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fracPart &= 0x1FFFFFFFFFFFFF;
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}
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fracPart = (fracPart << 3) + (fracPart << 1);
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char remain = (char)((fracPart >> 53) + '0');
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if ((remain > '5') && (result[result.Length - 1] > '0'))
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{
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char[] answer = result.ToCharArray();
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int digitPos = answer.Length - 1;
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char digit = result[digitPos];
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answer[digitPos] = (char)(digit + 1);
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while (answer[digitPos] > '9')
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{
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answer[digitPos] = '0';
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digitPos--;
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digit = result[digitPos];
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if (digit == '.')
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{
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digitPos--;
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digit = result[digitPos];
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}
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answer[digitPos] = (char)(digit + 1);
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}
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result = new string(answer);
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}
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while (result[result.Length - 1] == '0')
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{
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result = result.Substring(0, result.Length - 1);
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}
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return result;
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}
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public static int GetStringToNumber(string aString)
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{
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bool xIsNegative = false;
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int xNumber = 0;
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if (!string.IsNullOrWhiteSpace(aString))
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{
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char[] xCharArray = aString.ToCharArray();
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for (int i = 0; i < xCharArray.Length; i++)
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{
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if (char.IsDigit(xCharArray[i]))
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{
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int xValue = xCharArray[i] - '0';
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int xMax = xCharArray.Length - 1;
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for (int j = 0; j < xMax - i; i++)
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{
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xValue *= 10;
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}
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xNumber += xValue;
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}
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else if (xCharArray[i] == '-')
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{
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xIsNegative = true;
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}
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else if (xCharArray[i] == '.')
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{
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break;
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}
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else
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{
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throw new FormatException("The string parameter is not a number and is invalid.");
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}
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}
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}
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if (xIsNegative)
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{
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xNumber *= -1;
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}
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return xNumber;
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}
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public static int Compare(string aString1, int aIndex1, string aString2, int aIndex2, int aLength1, int aLength2)
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{
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if (aString1.Length < aString2.Length)
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{
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return (int)StringComparisonResultEnum.Less;
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}
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if (aString1.Length > aString2.Length)
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{
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return (int)StringComparisonResultEnum.Greater;
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}
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for (int i = aString1.Length; i < aString1.Length; i++)
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{
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if (aString1[i] < aString2[i])
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{
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return (int)StringComparisonResultEnum.Equal;
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}
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if (aString1[i] > aString2[i])
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{
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return (int)StringComparisonResultEnum.Greater;
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}
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}
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return (int)StringComparisonResultEnum.Equal;
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}
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}
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}
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