public static bool Read(PeepingTomStream stream, UnmanagedJsonParser parser, JsonParserState state, JsonOperationContext.ManagedPinnedBuffer buffer)
{
while (parser.Read() == false)
{
var read = stream.Read(buffer.Buffer.Array, buffer.Buffer.Offset, buffer.Length);
if (read == 0)
{
if (state.CurrentTokenType != JsonParserToken.EndObject)
{
throw new EndOfStreamException("Stream ended without reaching end of json content");
}
return(false);
}
parser.SetBuffer(buffer, 0, read);
}
return(true);
}
private bool ParseNumberUnlikely(byte b, ref uint pos, ref long value, JsonParserState state)
{
switch (b)
{
case (byte)'.':
{
if (!_isFractionedDouble)
{
_zeroPrefix = false; // 0.5, frex
_isFractionedDouble = true;
break;
}
ThrowWhenMalformed("Already got '.' in this number value");
break;
}
case (byte)'+':
break; // just record, appears in 1.4e+3
case (byte)'e':
case (byte)'E':
{
if (_isExponent)
{
ThrowWhenMalformed("Already got 'e' in this number value");
}
_isExponent = true;
_isFractionedDouble = true;
break;
}
case (byte)'-':
{
if (!_isNegative || _isExponent != false)
{
_isNegative = true;
break;
}
ThrowWhenMalformed("Already got '-' in this number value");
break;
}
case (byte)'\r':
case (byte)'\n':
{
_line++;
_charPos = 1;
if (!_zeroPrefix || _unmanagedWriteBuffer.SizeInBytes == 1)
{
if (_isNegative)
{
value *= -1;
}
state.CurrentTokenType = (_isFractionedDouble || _isOverflow) ? JsonParserToken.Float : JsonParserToken.Integer;
pos--;
_charPos--; // need to re-read this char
return(true);
}
ThrowWhenMalformed("Invalid number with zero prefix");
break;
}
}
return(false);
}
private bool ParseNumber(ref long value, ref uint pos)
{
JsonParserState state = _state;
uint bufferSize = _bufSize;
byte *inputBuffer = _inputBuffer;
while (true)
{
if (pos >= bufferSize)
{
goto NotANumber;
}
byte b = inputBuffer[pos];
byte digit = (byte)(b - (byte)'0');
_charPos++;
pos++;
if (digit <= 9) // PERF: Simplified the check to get rid of 1 comparison
{
// PERF: This is a fast loop for the most common characters found on numbers.
var next = (value * 10) + digit;
if (next < value) //overflow
{
_isOverflow = true;
}
value = next;
_unmanagedWriteBuffer.WriteByte(b);
continue;
}
if (b == ' ' || b == ',' || b == '}' || b == ']' || ParseNumberTable[b] == ParseNumberAction.ParseEnd)
{
if (!_zeroPrefix || _unmanagedWriteBuffer.SizeInBytes == 1)
{
if (_isNegative)
{
value *= -1;
}
state.CurrentTokenType = (_isFractionedDouble || _isOverflow) ? JsonParserToken.Float : JsonParserToken.Integer;
pos--;
_charPos--;// need to re-read this char
goto IsANumber;
}
ThrowWhenMalformed("Invalid number with zero prefix");
break;
}
if (ParseNumberTable[b] == ParseNumberAction.ParseUnlikely)
{
if (ParseNumberUnlikely(b, ref pos, ref value, state))
{
goto IsANumber;
}
_unmanagedWriteBuffer.WriteByte(b);
continue;
}
// No hit, we are done.
ThrowWhenMalformed("Number cannot end with char with: '" + (char)b + "' (" + b + ")");
}
IsANumber:
return(true);
NotANumber:
return(false); // Will never execute.
}
public static unsafe string ReadString(JsonOperationContext context, PeepingTomStream peepingTomStream, UnmanagedJsonParser parser, JsonParserState state, JsonOperationContext.ManagedPinnedBuffer buffer)
{
if (Read(peepingTomStream, parser, state, buffer) == false)
{
ThrowInvalidJson(peepingTomStream);
}
if (state.CurrentTokenType == JsonParserToken.Null)
{
return(null);
}
if (state.CurrentTokenType != JsonParserToken.String)
{
ThrowInvalidJson(peepingTomStream);
}
return(context.AllocateStringValue(null, state.StringBuffer, state.StringSize).ToString());
}
public static async Task <bool> ReadAsync(PeepingTomStream peepingTomStream, UnmanagedJsonParser parser, JsonParserState state, JsonOperationContext.ManagedPinnedBuffer buffer)
{
if (parser.Read())
{
return(true);
}
var read = await peepingTomStream.ReadAsync(buffer.Buffer.Array, buffer.Buffer.Offset, buffer.Length).ConfigureAwait(false);
if (read == 0)
{
if (state.CurrentTokenType != JsonParserToken.EndObject)
{
throw new EndOfStreamException("Stream ended without reaching end of json content");
}
return(false);
}
parser.SetBuffer(buffer, 0, read);
return(parser.Read());
}
public static IEnumerable <BlittableJsonReaderObject> ReadArrayToMemory(JsonOperationContext context, PeepingTomStream peepingTomStream, UnmanagedJsonParser parser, JsonParserState state, JsonOperationContext.ManagedPinnedBuffer buffer)
{
if (Read(peepingTomStream, parser, state, buffer) == false)
{
ThrowInvalidJson(peepingTomStream);
}
if (state.CurrentTokenType != JsonParserToken.StartArray)
{
ThrowInvalidJson(peepingTomStream);
}
while (true)
{
if (Read(peepingTomStream, parser, state, buffer) == false)
{
ThrowInvalidJson(peepingTomStream);
}
if (state.CurrentTokenType == JsonParserToken.EndArray)
{
break;
}
using (var builder = new BlittableJsonDocumentBuilder(context, BlittableJsonDocumentBuilder.UsageMode.None, "readArray/singleResult", parser, state))
{
ReadObject(builder, peepingTomStream, parser, buffer);
yield return(builder.CreateReader());
}
}
}
public static long ReadLong(JsonOperationContext context, PeepingTomStream peepingTomStream, UnmanagedJsonParser parser, JsonParserState state, JsonOperationContext.ManagedPinnedBuffer buffer)
{
if (Read(peepingTomStream, parser, state, buffer) == false)
{
ThrowInvalidJson(peepingTomStream);
}
if (state.CurrentTokenType != JsonParserToken.Integer)
{
ThrowInvalidJson(peepingTomStream);
}
return(state.Long);
}