Stub out iterator methods

binding.js

@@ -0,0 +1 @@
+module.exports = require('node-gyp-build')(__dirname)

iterator.js

@@ -1,11 +1,12 @@
 const util = require('util')
 const AbstractIterator = require('abstract-leveldown').AbstractIterator
 const fastFuture = require('fast-future')
+const binding = require('./binding')
 
 function Iterator (db, options) {
   AbstractIterator.call(this, db)
 
-  this.binding = db.binding.iterator(options)
+  this.context = binding.iterator(db.context, options)
   this.cache = null
   this.finished = false
   this.fastFuture = fastFuture()
@@ -19,7 +20,7 @@ Iterator.prototype._seek = function (target) {
   }
 
   this.cache = null
-  this.binding.seek(target)
+  binding.iterator_seek(this.context, target)
   this.finished = false
 }
 
@@ -40,7 +41,7 @@ Iterator.prototype._next = function (callback) {
       callback()
     })
   } else {
-    this.binding.next(function (err, array, finished) {
+    binding.iterator_next(this.context, function (err, array, finished) {
       if (err) return callback(err)
 
       that.cache = array
@@ -54,7 +55,7 @@ Iterator.prototype._next = function (callback) {
 
 Iterator.prototype._end = function (callback) {
   delete this.cache
-  this.binding.end(callback)
+  binding.iterator_end(this.context, callback)
 }
 
 module.exports = Iterator

leveldown.js

@@ -1,6 +1,6 @@
 const util = require('util')
 const AbstractLevelDOWN = require('abstract-leveldown').AbstractLevelDOWN
-const binding = require('node-gyp-build')(__dirname)
+const binding = require('./binding')
 const ChainedBatch = require('./chained-batch')
 const Iterator = require('./iterator')
 

napi/leveldown.cc

@@ -382,8 +382,57 @@ NAPI_METHOD(db_put) {
   NAPI_RETURN_UNDEFINED();
 }
 
+/**
+ * Creates an iterator.
+ */
+NAPI_METHOD(iterator) {
+  NAPI_ARGV(2);
+  NAPI_DB_CONTEXT();
+
+  // TODO assume options object is always passed in! it will
+  // make the code simpler
+
+  // TODO return an external for IteratorContext
+  NAPI_RETURN_UNDEFINED();
+}
+
+/**
+ * Seeks an iterator.
+ */
+NAPI_METHOD(iterator_seek) {
+  NAPI_ARGV(2);
+  // NAPI_ITERATOR_CONTEXT();
+
+  NAPI_RETURN_UNDEFINED();
+}
+
+/**
+ * Moves an iterator to next element.
+ */
+NAPI_METHOD(iterator_next) {
+  NAPI_ARGV(2);
+  // NAPI_ITERATOR_CONTEXT();
+
+  NAPI_RETURN_UNDEFINED();
+}
+
+/**
+ * Ends an iterator.
+ */
+NAPI_METHOD(iterator_end) {
+  NAPI_ARGV(2);
+  // NAPI_ITERATOR_CONTEXT();
+
+  NAPI_RETURN_UNDEFINED();
+}
+
 NAPI_INIT() {
   NAPI_EXPORT_FUNCTION(db);
   NAPI_EXPORT_FUNCTION(db_open);
   NAPI_EXPORT_FUNCTION(db_put);
+
+  NAPI_EXPORT_FUNCTION(iterator);
+  NAPI_EXPORT_FUNCTION(iterator_seek);
+  NAPI_EXPORT_FUNCTION(iterator_next);
+  NAPI_EXPORT_FUNCTION(iterator_end);
 }