static unsafe void Main(string[] args)
{
string helloWorldJson = @"{ ""answer"": 42, ""name"": ""Egor"" }";
ReadOnlySpan <byte> bytes = Encoding.UTF8.GetBytes(helloWorldJson);
// SimdJson is UTF8 only
fixed(byte *ptr = bytes)
{
// SimdJsonN -- N stands for Native, it means we are using Bindings for simdjson native lib
// SimdJson -- fully managed .NET Core 3.0 port
using (ParsedJsonN doc = SimdJsonN.ParseJson(ptr, bytes.Length))
{
Console.WriteLine($"Is json valid:{doc.IsValid}\n");
// open iterator:
using (var iterator = new ParsedJsonIteratorN(doc))
{
while (iterator.MoveForward())
{
if (iterator.IsInteger)
{
Console.WriteLine("integer: " + iterator.GetInteger());
}
if (iterator.IsString)
{
Console.WriteLine("string: " + iterator.GetUtf16String());
}
}
}
}
}
}
unsafe protected override BookShelf Deserialize(Stream stream)
{
// A small Json like {"Books":[{"Title":"Book 1","Id":1}]}
// will be translated to the following JsonTokenTypes by the iterator:
// String = "Books"
// StartArray [
// StartObject {
// String "Title"
// String "Book 1"
// String "Id"
// Number 1
// EndObject }
// EndArray ]
// EndObject }
BookShelf lret = new BookShelf()
{
Books = new List <Book>()
};
ReadOnlySpan <byte> booksPropertySpan = BooksProperty;
if (stream is MemoryStream mem)
{
byte[] buffer = mem.GetBuffer();
fixed(byte *ptr = buffer)
{
using (ParsedJsonN doc = SimdJsonN.ParseJson(ptr, (int)stream.Length))
{
// open iterator:
myIterator = new ParsedJsonIteratorN(doc);
try
{
while (myIterator.MoveForward() && myIterator.IsString)
{
if (new Span <byte>(myIterator.GetUtf8String(), (int)myIterator.GetUtf8StringLength()).SequenceEqual(booksPropertySpan))
{
if (myIterator.MoveForward() && myIterator.IsObjectOrArray && myIterator.Down())
{
ReadBooks(lret.Books);
}
}
}
}
finally
{
myIterator.Dispose();
}
}
}
}
return(lret);
}
public unsafe ulong _SimdJsonN(byte[] data, string fileName, string fileSize)
{
ulong numbersCount = 0;
fixed(byte *dataPtr = data)
{
using (ParsedJsonN doc = SimdJsonN.ParseJson(dataPtr, data.Length))
using (var iterator = new ParsedJsonIteratorN(doc))
{
while (iterator.MoveForward())
{
//if (iterator.IsDouble || iterator.IsInteger)
numbersCount++;
}
}
}
return(numbersCount);
}
public unsafe ulong SimdJsonNUtf8(byte[] data, string fileName, string fileSize)
{
ulong wordsCount = 0;
fixed(byte *dataPtr = data)
{
using (ParsedJsonN doc = SimdJsonN.ParseJson(dataPtr, data.Length))
using (var iterator = new ParsedJsonIteratorN(doc))
{
while (iterator.MoveForward())
{
if (iterator.IsString)
{
if (*iterator.GetUtf8String() == (byte)'a')
{
wordsCount++;
}
}
}
}
}
return(wordsCount);
}
public unsafe ulong SimdJsonNUtf16(byte[] data, string fileName, string fileSize)
{
ulong wordsCount = 0;
fixed(byte *dataPtr = data)
{
using (ParsedJsonN doc = SimdJsonN.ParseJson(dataPtr, data.Length))
using (var iterator = new ParsedJsonIteratorN(doc))
{
while (iterator.MoveForward())
{
if (iterator.IsString)
{
if (iterator.GetUtf16String().StartsWith('a')) // UTF16 in SimdJsonN is expected to be slow for now (see https://github.com/lemire/simdjson/pull/101)
{
wordsCount++;
}
}
}
}
}
return(wordsCount);
}
