public bool TryReadObject(out JsonObjectReader reader, ref JsonObjectFileInfo fileInfo)
{
fileInfo.StartLine = fileInfo.EndLine;
int status;
var length = ReadObject(out status, ref fileInfo);
if (status == KResultInvalidJson)
{
throw new Exception($"JsonStreamReader.TryReadObject expected '{{' as the next character. Line=[{fileInfo.EndLine}]");
}
if (status != KResultSuccess)
{
reader = new JsonObjectReader
{
Line = fileInfo.StartLine
};
return(false);
}
reader = new JsonObjectReader(m_ObjectBuffer, 0, length)
{
Line = fileInfo.StartLine
};
return(true);
}
public static void Accept(Stream input, Stream output)
{
var jsonStreamReader = new JsonStreamReader(input);
using (var binaryStream = new MemoryStream())
using (var binaryWriter = new BinaryWriter(binaryStream))
{
var commandStreamWriter = new BinaryWriter(output);
var c = jsonStreamReader.ReadChar(); // '['
Assert.IsTrue(c == '[', $"FlatJson.FrontEnd.Accept expected '[' but found '{c}' as the first character of the stream. Line=[1]");
var fileInfo = new JsonObjectFileInfo();
// Read the next full json object from '{' to '}
JsonObjectReader objectReader;
while (jsonStreamReader.TryReadObject(out objectReader, ref fileInfo))
{
objectReader.ReadBeginObject();
// Unpack the typeId
var property = objectReader.ReadPropertyNameSegment();
Assert.IsTrue(property.Array[property.Offset] == '$');
var typeId = (UTinyTypeId)objectReader.ReadUInt16();
objectReader.Position = 0;
commandStreamWriter.Write(CommandType.GetCreateCommandType(typeId));
// Translate the json object to binary
BinaryTranslator.TranslateObject(ref objectReader, binaryWriter);
// Write the command payload as binary
commandStreamWriter.Write((uint)binaryStream.Position);
commandStreamWriter.Write(binaryStream.GetBuffer(), 0, (int)binaryStream.Position);
binaryStream.Position = 0;
c = jsonStreamReader.ReadChar(); // ',' or ']'
if (!(c == ',' || c == ']'))
{
throw new Exception($"FlatJson.FrontEnd.Accept expected ',' or ']' but found '{Escape(c)}' as the next character in the stream. Line=[{objectReader.Line}]");
}
}
}
}
/// <summary>
/// Reads a json object from '{' to '}'
/// </summary>
/// <param name="result">Read result</param>
/// <returns>Number of characters read</returns>
private int ReadObject(out int result, ref JsonObjectFileInfo fileInfo)
{
unsafe
{
fixed(char *p = m_CharBuffer)
{
result = KResultError;
char c;
var count = 0;
var index = 0;
var buffer = m_ObjectBuffer;
var length = m_ObjectBuffer.Length;
// Read until we hit the first '{' brace
var found = false;
do
{
if (m_Position >= m_Count)
{
// Refill the underlying buffer
if (!FillBuffer())
{
result = KResultEndOfStream;
return(0);
}
}
for (; m_Position < m_Count; m_Position++)
{
c = *(p + m_Position);
if (c == '{')
{
found = true;
break;
}
switch (c)
{
case '\n':
fileInfo.StartLine++;
fileInfo.EndLine++;
continue;
case ' ':
case '\t':
case '\r':
continue;
}
result = KResultInvalidJson;
return(count);
}
} while (!found);
var begin = m_Position;
var depth = 1;
m_Position++;
// Read until we hit the matching '}' brace
found = false;
do
{
// Output buffer bounds check
if (index + m_Position - begin >= length - 1)
{
// realloc
length *= 2;
m_ObjectBuffer = new char[length];
Array.Copy(buffer, m_ObjectBuffer, index);
buffer = m_ObjectBuffer;
}
if (m_Position >= m_Count)
{
// Copy to the output buffer
var len = m_Count - begin;
Array.Copy(m_CharBuffer, begin, buffer, index, len);
index += len;
count += len;
// Refill the underlying buffer
if (!FillBuffer())
{
result = KResultEndOfStream;
return(count);
}
begin = m_Position;
}
var end = m_Position + Math.Min(length - (index + m_Position - begin), m_Count - m_Position);
for (; m_Position < end; m_Position++)
{
c = *(p + m_Position);
if (c == '{')
{
depth++;
}
else if (c == '}')
{
depth--;
if (depth != 0)
{
continue;
}
result = KResultSuccess;
found = true;
m_Position++;
break;
}
else if (c == '\n')
{
fileInfo.EndLine++;
}
}
} while (!found);
// Flush to the output buffer
Array.Copy(m_CharBuffer, begin, buffer, index, m_Position - begin);
count += m_Position - begin;
return(count);
}
}
}
