From 43edd6bba4a059524e390b6b0c38188218439e49 Mon Sep 17 00:00:00 2001
From: Luiz Peres <luiz_peres10@hotmail.com>
Date: Fri, 17 Apr 2020 00:51:12 -0700
Subject: [PATCH] Trying different approaches, such as exposing tapes (#34)

---
 simdjson/bindings.cpp | 32 ++++++++++++++++++++++++++++++--
 simdjson/bindings.h   |  2 ++
 2 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/simdjson/bindings.cpp b/simdjson/bindings.cpp
index 5795739..9039cfc 100644
--- a/simdjson/bindings.cpp
+++ b/simdjson/bindings.cpp
@@ -112,10 +112,8 @@ Napi::Value simdjsonnode::ParseWrapped(const Napi::CallbackInfo& info) {
   Napi::Env env = info.Env();
   std::string json = info[0].As<Napi::String>();
   try {
-
     dom::parser parser;
     return makeJSONObject(env, parser.parse(json));
-
   } catch (simdjson_error &error) {
     Napi::Error::New(env, error_message(error.error())).ThrowAsJavaScriptException();
     return env.Null();
@@ -141,9 +139,39 @@ Napi::Object simdjsonnode::LazyParseWrapped(const Napi::CallbackInfo& info) {
   return result;  
 }
 
+Napi::Object simdjsonnode::BuffersWithParseWrapped(const Napi::CallbackInfo& info) {
+  Napi::Env env = info.Env();
+  std::string json = info[0].As<Napi::String>();
+  dom::parser parser;
+  error_code error = parser.parse(json).error();
+  if (error) {
+    Napi::Error::New(env, error_message(error)).ThrowAsJavaScriptException();
+    return Napi::Object::New(env);
+  }
+  uint64_t *tapebuf = std::move(parser.doc.tape).release();
+  uint8_t *stringbuf = std::move(parser.doc.string_buf).release();
+  size_t tapebufsize = parser.current_loc;
+  size_t stringbufsize = parser.current_string_buf_loc - stringbuf;
+  Napi::ArrayBuffer tapebufobj = Napi::ArrayBuffer::New(env, static_cast<void *>(tapebuf), tapebufsize,
+    [](Napi::Env /*env*/, void * obj) {
+      uint64_t *o = static_cast<uint64_t *>(obj);
+      delete o;
+    });
+  Napi::ArrayBuffer stringbufobj = Napi::ArrayBuffer::New(env, static_cast<void *>(stringbuf), stringbufsize,
+    [](Napi::Env /*env*/, void * obj) {
+      uint8_t *o = static_cast<uint8_t *>(obj);
+      delete o;
+    });
+  Napi::Object result = Napi::Object::New(env);
+  result.Set("tapeBuffer", tapebufobj);
+  result.Set("stringBuffer", stringbufobj);
+  return result;
+}
+
 Napi::Object simdjsonnode::Init(Napi::Env env, Napi::Object exports) {
   exports.Set("isValid", Napi::Function::New(env, simdjsonnode::IsValidWrapped));
   exports.Set("parse", Napi::Function::New(env, simdjsonnode::ParseWrapped));
   exports.Set("lazyParse", Napi::Function::New(env, simdjsonnode::LazyParseWrapped));
+  exports.Set("buffersWith", Napi::Function::New(env, simdjsonnode::BuffersWithParseWrapped));
   return exports;
 }
diff --git a/simdjson/bindings.h b/simdjson/bindings.h
index 368c59d..f8ec1a7 100644
--- a/simdjson/bindings.h
+++ b/simdjson/bindings.h
@@ -15,5 +15,7 @@ namespace simdjsonnode {
   Napi::Value ValueForKeyPathWrapped(const Napi::CallbackInfo& info);
   Napi::Value findKeyPath(Napi::Env env, std::vector<std::string> subpaths, dom::element pjh);
 
+  Napi::Object BuffersWithParseWrapped(const Napi::CallbackInfo& info);
+
   Napi::Object Init(Napi::Env env, Napi::Object exports);
 }