public KvTextReader(KeyValue kv, Stream input)
: base(input)
{
bool wasQuoted;
bool wasConditional;
var currentKey = kv;
do
{
// bool bAccepted = true;
string s = ReadToken(out wasQuoted, out wasConditional);
if (string.IsNullOrEmpty(s))
break;
if (currentKey == null)
currentKey = new KeyValue(s, null);
else
currentKey.Name = s;
s = ReadToken(out wasQuoted, out wasConditional);
if (wasConditional)
{
// bAccepted = ( s == "[$WIN32]" );
// Now get the '{'
s = ReadToken(out wasQuoted, out wasConditional);
}
if (s.StartsWith("{") && !wasQuoted)
{
// header is valid so load the file
currentKey.RecursiveLoadFromBuffer(this);
}
else
{
throw new Exception("LoadFromBuffer: missing {");
}
currentKey = null;
} while (!EndOfStream);
}
/// <summary>
/// Populate this instance from the given <see cref="Stream"/> as a binary <see cref="KeyValue"/>.
/// </summary>
/// <param name="input">The input <see cref="Stream"/> to read from.</param>
/// <returns><c>true</c> if the read was successful; otherwise, <c>false</c>.</returns>
public bool ReadAsBinary(Stream input)
{
Children = new List<KeyValue>();
while (true)
{
var type = (Type)input.ReadByte();
if (type == Type.End)
{
break;
}
var current = new KeyValue(null, null) {Name = input.ReadNullTermString(Encoding.UTF8)};
try
{
switch (type)
{
case Type.None:
{
current.ReadAsBinary(input);
break;
}
case Type.String:
{
current.Value = input.ReadNullTermString(Encoding.UTF8);
break;
}
case Type.WideString:
{
throw new InvalidDataException("wstring is unsupported");
}
case Type.Int32:
case Type.Color:
case Type.Pointer:
{
current.Value = Convert.ToString(input.ReadInt32());
break;
}
case Type.UInt64:
{
current.Value = Convert.ToString(input.ReadUInt64());
break;
}
case Type.Float32:
{
current.Value = Convert.ToString(input.ReadFloat());
break;
}
default:
{
throw new InvalidDataException("Unknown KV type encountered.");
}
}
}
catch (InvalidDataException ex)
{
throw new InvalidDataException(string.Format("An exception ocurred while reading KV '{0}'", current.Name), ex);
}
Children.Add(current);
}
return input.Position == input.Length;
}
internal void RecursiveLoadFromBuffer(KvTextReader kvr)
{
bool wasQuoted;
bool wasConditional;
while (true)
{
// bool bAccepted = true;
// get the key name
var name = kvr.ReadToken(out wasQuoted, out wasConditional);
if (string.IsNullOrEmpty(name))
{
throw new Exception("RecursiveLoadFromBuffer: got EOF or empty keyname");
}
if (name.StartsWith("}") && !wasQuoted) // top level closed, stop reading
break;
var dat = new KeyValue(name, null) {Children = new List<KeyValue>()};
Children.Add(dat);
// get the value
string value = kvr.ReadToken(out wasQuoted, out wasConditional);
if (wasConditional && value != null)
{
// bAccepted = ( value == "[$WIN32]" );
value = kvr.ReadToken(out wasQuoted, out wasConditional);
}
if (value == null)
throw new Exception("RecursiveLoadFromBuffer: got NULL key");
if (value.StartsWith("}") && !wasQuoted)
throw new Exception("RecursiveLoadFromBuffer: got } in key");
if (value.StartsWith("{") && !wasQuoted)
{
dat.RecursiveLoadFromBuffer(kvr);
}
else
{
if (wasConditional)
{
throw new Exception("RecursiveLoadFromBuffer: got conditional between key and value");
}
dat.Value = value;
// blahconditionalsdontcare
}
}
}
/// <summary>
/// Attempts to create an instance of <see cref="KeyValue"/> from the given input text.
/// </summary>
/// <param name="input">The input text to load.</param>
/// <returns>a <see cref="KeyValue"/> instance if the load was successful, or <c>null</c> on failure.</returns>
/// <remarks>
/// This method will swallow any exceptions that occur when reading, use <see cref="ReadAsText"/> if you wish to handle exceptions.
/// </remarks>
public static KeyValue LoadFromString(string input)
{
byte[] bytes = Encoding.UTF8.GetBytes(input);
using (var stream = new MemoryStream(bytes))
{
var kv = new KeyValue(null, null);
try
{
if (kv.ReadAsText(stream) == false)
return null;
return kv;
}
catch (Exception)
{
return null;
}
}
}
static KeyValue LoadFromFile(string path, bool asBinary)
{
if (File.Exists(path) == false)
{
return null;
}
try
{
using (var input = File.Open(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
var kv = new KeyValue(null, null);
if (asBinary)
{
if (kv.ReadAsBinary(input) == false)
{
return null;
}
}
else
{
if (kv.ReadAsText(input) == false)
{
return null;
}
}
return kv;
}
}
catch (Exception)
{
return null;
}
}
