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Utf8JsonWriter.WriteValues.Literal.cs
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Utf8JsonWriter.WriteValues.Literal.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Diagnostics;
namespace System.Text.Json
{
public sealed partial class Utf8JsonWriter
{
/// <summary>
/// Writes the JSON literal "null" as an element of a JSON array.
/// </summary>
/// <exception cref="InvalidOperationException">
/// Thrown if this would result in invalid JSON being written (while validation is enabled).
/// </exception>
public void WriteNullValue()
{
WriteLiteralByOptions(JsonConstants.NullValue);
SetFlagToAddListSeparatorBeforeNextItem();
_tokenType = JsonTokenType.Null;
}
/// <summary>
/// Writes the <see cref="bool"/> value (as a JSON literal "true" or "false") as an element of a JSON array.
/// </summary>
/// <param name="value">The value write.</param>
/// <exception cref="InvalidOperationException">
/// Thrown if this would result in invalid JSON being written (while validation is enabled).
/// </exception>
public void WriteBooleanValue(bool value)
{
if (value)
{
WriteLiteralByOptions(JsonConstants.TrueValue);
_tokenType = JsonTokenType.True;
}
else
{
WriteLiteralByOptions(JsonConstants.FalseValue);
_tokenType = JsonTokenType.False;
}
SetFlagToAddListSeparatorBeforeNextItem();
}
private void WriteLiteralByOptions(ReadOnlySpan<byte> utf8Value)
{
if (!_options.SkipValidation)
{
ValidateWritingValue();
}
if (_options.Indented)
{
WriteLiteralIndented(utf8Value);
}
else
{
WriteLiteralMinimized(utf8Value);
}
}
private void WriteLiteralMinimized(ReadOnlySpan<byte> utf8Value)
{
Debug.Assert(utf8Value.Length <= 5);
int maxRequired = utf8Value.Length + 1; // Optionally, 1 list separator
if (_memory.Length - BytesPending < maxRequired)
{
Grow(maxRequired);
}
Span<byte> output = _memory.Span;
if (_currentDepth < 0)
{
output[BytesPending++] = JsonConstants.ListSeparator;
}
utf8Value.CopyTo(output.Slice(BytesPending));
BytesPending += utf8Value.Length;
}
private void WriteLiteralIndented(ReadOnlySpan<byte> utf8Value)
{
int indent = Indentation;
Debug.Assert(indent <= 2 * _options.MaxDepth);
Debug.Assert(utf8Value.Length <= 5);
int maxRequired = indent + utf8Value.Length + 1 + s_newLineLength; // Optionally, 1 list separator and 1-2 bytes for new line
if (_memory.Length - BytesPending < maxRequired)
{
Grow(maxRequired);
}
Span<byte> output = _memory.Span;
if (_currentDepth < 0)
{
output[BytesPending++] = JsonConstants.ListSeparator;
}
if (_tokenType != JsonTokenType.PropertyName)
{
if (_tokenType != JsonTokenType.None)
{
WriteNewLine(output);
}
JsonWriterHelper.WriteIndentation(output.Slice(BytesPending), indent);
BytesPending += indent;
}
utf8Value.CopyTo(output.Slice(BytesPending));
BytesPending += utf8Value.Length;
}
}
}