Float parse from string - CSharp System

CSharp examples for System:Single

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Description

Float parse from string

Demo Code


using System.Collections;
using UnityEngine;

public class Main{
        //   fast alterantive to parse.Floats
   //   needs more error checking
   static public float   Float(string FloatStr)
   {/*  w  w w. j a v  a 2s  . c om*/
      float Major = 0;
      float Minor = 0;
      int Pos = 0;
      float Modifier = 1.0f;

      if (FloatStr [0] == '-') {
         Modifier = -1.0f;
         Pos++;
      }

      //   parse major
      while (Pos < FloatStr.Length) {
         if (FloatStr [Pos] == '.')
         {
            Pos++;
            break;
         }

         //   throw if non-number
         var CharNumber = FloatStr [Pos] - '0';
         if (CharNumber < 0 || CharNumber > 9)
            throw new System.Exception ("Nan string");

         Major *= 10;
         Major += CharNumber;
         Pos++;
      }
      
      //   parse minor
      float MinorScale = 1.0f / 10.0f;
      while (Pos < FloatStr.Length) {
         if ( FloatStr[Pos] == 'f' )
         {
            Pos++;
            continue;
         }

         //   throw if non-number
         var CharNumber = FloatStr [Pos] - '0';
         if (CharNumber < 0 || CharNumber > 9)
            throw new System.Exception ("Nan string");
         
         Minor += CharNumber * MinorScale;
         MinorScale /= 10.0f;
         Pos++;
      }
      
      return Modifier * (Major + Minor);
   }
}

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