/// <summary>
/// Parses an array from the current parsing position.
/// The prerequisite for calling this method is, that an array begin token has been read.
/// </summary>
/// <returns>The array found at the parsing position.</returns>
NSArray ParseArray()
{
//Skip begin token
int startPosition = this.index;
Skip();
SkipWhitespacesAndComments();
List <NSObject> objects = new List <NSObject>();
while (!Accept(ARRAY_END_TOKEN))
{
objects.Add(ParseObject());
SkipWhitespacesAndComments();
if (Accept(ARRAY_ITEM_DELIMITER_TOKEN))
{
Skip();
}
else
{
break; //must have reached end of array
}
SkipWhitespacesAndComments();
}
//parse end token
Read(ARRAY_END_TOKEN);
return(new NSArray(objects.ToArray(), BinaryOrigin.FromRange(startPosition, this.index)));
}
/// <summary>
/// Parses the NSObject found at the current position in the property list
/// data stream.
/// </summary>
/// <returns>The parsed NSObject.</returns>
/// <seealso cref="ASCIIPropertyListParser.index"/>
NSObject ParseObject()
{
switch (data[index])
{
case ARRAY_BEGIN_TOKEN:
{
return(ParseArray());
}
case DICTIONARY_BEGIN_TOKEN:
{
return(ParseDictionary());
}
case DATA_BEGIN_TOKEN:
{
return(ParseData());
}
case QUOTEDSTRING_BEGIN_TOKEN:
{
int startIndex = this.index;
string quotedString = ParseQuotedString();
//apple dates are quoted strings of length 20 and after the 4 year digits a dash is found
if (quotedString.Length == 20 && quotedString[4] == DATE_DATE_FIELD_DELIMITER)
{
try
{
return(new NSDate(quotedString, BinaryOrigin.FromRange(startIndex, this.index)));
}
catch (Exception)
{
//not a date? --> return string
return(new NSString(quotedString, BinaryOrigin.FromRange(startIndex, this.index)));
}
}
return(new NSString(quotedString, BinaryOrigin.FromRange(startIndex, this.index)));
}
default:
{
//0-9
if (data[index] > 0x2F && data[index] < 0x3A)
{
//could be a date or just a string
return(ParseDateString());
}
else
{
//non-numerical -> string or boolean
var startIndex = this.index;
string parsedString = ParseString();
return(new NSString(parsedString, BinaryOrigin.FromRange(startIndex, this.index)));
}
}
}
}
/// <summary>
/// Attempts to parse a plain string as a date if possible.
/// </summary>
/// <returns>A NSDate if the string represents such an object. Otherwise a NSString is returned.</returns>
NSObject ParseDateString()
{
var startIndex = this.index;
string numericalString = ParseString();
if (numericalString.Length > 4 && numericalString[4] == DATE_DATE_FIELD_DELIMITER)
{
try
{
return(new NSDate(numericalString, BinaryOrigin.FromRange(startIndex, this.index)));
}
catch (Exception)
{
//An exception occurs if the string is not a date but just a string
}
}
return(new NSString(numericalString, BinaryOrigin.FromRange(startIndex, this.index)));
}