public static string NonCDataNormalize( string value ) {
int len = value.Length;
if ( len <= 0 ) {
return string.Empty;
}
int startPos = 0;
StringBuilder norValue = null;
XmlCharType xmlCharType = XmlCharType.Instance;
while ( xmlCharType.IsWhiteSpace( value[startPos] ) ) {
startPos++;
if ( startPos == len ) {
return " ";
}
}
int i = startPos;
while ( i < len ) {
if ( !xmlCharType.IsWhiteSpace( value[i] ) ) {
i++;
continue;
}
int j = i + 1;
while ( j < len && xmlCharType.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;
}
}
}