StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space : String Format « Data Types « C# / C Sharp

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2. Data Types
3. String Format

StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space

        

//Copyright (c) Microsoft Corporation.  All rights reserved.

using System;
using System.Collections.Generic;
using System.Text;

namespace Xml.Schema.Linq
{
    internal static class XmlComplianceUtil
    {


        // StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space
        public static string StripSpaces( string value ) {
            int len = value.Length;
            if ( len <= 0 ) {
               return string.Empty;
            }

            int startPos = 0;
            StringBuilder norValue = null;

            while ( value[startPos] == 0x20 ) {
                startPos++;
                if ( startPos == len ) {
                    return " ";
                }
            }

            int i;
            for ( i = startPos; i < len; i++ ) {
                if ( value[i] == 0x20 ) {
                    int j = i + 1;
                    while ( j < len && value[j] == 0x20 ) {
                        j++;
                    }
                    if ( j == len ) {
                        if ( norValue == null ) {
                            return value.Substring( startPos, i - startPos );
                        }
                        else {
                            norValue.Append( value, startPos, i - startPos );
                            return norValue.ToString();
                        }
                   }
                   if ( j > i + 1 ) {
                        if ( norValue == null ) {
                            norValue = new StringBuilder( len );
                        }
                        norValue.Append( value, startPos, i - startPos + 1 );
                        startPos = j;
                        i = j - 1;
                    }
                }
            }
            if ( norValue == null ) {
                return ( startPos == 0 ) ? value : value.Substring( startPos, len - startPos );
            }
            else {
                if ( i > startPos ) {
                   norValue.Append( value, startPos, i - startPos );
               }
                return norValue.ToString();
            }

            
        }

        // StripSpaces removes spaces at the beginning and at the end of the value and replaces sequences of spaces with a single space
        public static void StripSpaces( char[] value, int index, ref int len ) {
            if ( len <= 0 ) {
               return;
            }

            int startPos = index;
            int endPos = index + len;

            while ( value[startPos] == 0x20 ) {
                startPos++;
                if ( startPos == endPos ) {
                    len = 1;
                    return;
                }
            }

            int offset = startPos - index;
            int i;
            for ( i = startPos; i < endPos; i++ ) {
                char ch;
                if ( ( ch = value[i] ) == 0x20 ) {
                    int j = i + 1;
                    while ( j < endPos && value[j] == 0x20 ) {
                        j++;
                    }
                    if ( j == endPos ) {
                        offset += ( j - i );
                        break;
                    }
                    if ( j > i+1 ) {
                        offset += ( j - i - 1 );
                        i = j - 1;
                    }
                }
                value[i-offset] = ch;
            }
            len -= offset;

            return;
        }
    }
}

   
    
    
    
    
    
    
    
  

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