Non CData Normalize : XmlDocument « XML « C# / C Sharp

1. C# / C Sharp
2. XML
3. XmlDocument

Non CData Normalize

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

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

namespace Xml.Schema.Linq
{
    internal static class XmlComplianceUtil
    {
        // Replaces \r\n, \n, \r and \t with single space (0x20) and then removes spaces
        // at the beggining and and the end of the string and replaces sequences of spaces
        // with a single space.
        public static string NonCDataNormalize( string value ) {
            int len = value.Length;
            if ( len <= 0 ) {
               return string.Empty;
            }

            int startPos = 0;
            StringBuilder norValue = null;
            while (IsWhiteSpace( value[startPos] ) ) {
                startPos++;
                if ( startPos == len ) {
                    return " ";
                }
            }

            int i = startPos;
            while ( i < len ) {
                if ( !IsWhiteSpace( value[i] ) ) {
                    i++;
                    continue;
                }

                int j = i + 1;
                while ( j < len && IsWhiteSpace( value[j] ) ) {
                    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 || value[i] != 0x20 ) {
                    if ( norValue == null ) {
                        norValue = new StringBuilder( len );
                    }
                    norValue.Append( value, startPos, i - startPos );
                    norValue.Append( (char)0x20 );
                    startPos = j;
                    i = j;
                }
                else {
                    i++;
                }
            }

            if ( norValue != null ) {
                if ( startPos < i ) {
                    norValue.Append( value, startPos, i - startPos );
                }
                return norValue.ToString();
            }
            else {
                if ( startPos > 0 ) {
                    return value.Substring( startPos, len - startPos );
                }
                else {
                    return value;
                }
            }
            
        }

        // Replaces \r\n, \n, \r and \t with single space (0x20) 
        public static string CDataNormalize( string value ) {
            int len = value.Length;

            if ( len <= 0 ) {
               return string.Empty;
            }

            int i = 0;
            int startPos = 0;
            StringBuilder norValue = null;

            while ( i < len ) {
                char ch = value[i];
                if ( ch >= 0x20 || ( ch != 0x9 && ch != 0xA && ch != 0xD ) ) {
                    i++;
                    continue;
                }

                if ( norValue == null ) {
                    norValue = new StringBuilder( len );
                }
                if ( startPos < i ) {
                    norValue.Append( value, startPos, i - startPos );
                }
                norValue.Append( (char)0x20 );

                if ( ch == 0xD && ( i+1 < len && value[i+1] == 0xA ) ) {
                    i += 2;
                }
                else {
                    i++;
                }
                startPos = i;
            }

            if ( norValue == null ) {
                return value;
            }
            else {
               if ( i > startPos ) {
                   norValue.Append(value, startPos, i-startPos);
               }
               return norValue.ToString();
            }

            
        }


       internal static bool IsWhiteSpace(char c) {

            switch(c) {
                case (char)0x9:
                case (char)0xA:
                case (char)0xD:
                case (char)0x20: return true;
                default: return false;
            }

        }
    }
}

   
    
    
    
    
    
    
    
  

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