From ae49637463e91773f54ba3ecd798082e4d2c7cd8 Mon Sep 17 00:00:00 2001
From: Lam Pham-Sy <lam.pham-sy@scality.com>
Date: Fri, 26 Aug 2016 17:46:03 +0200
Subject: [PATCH] Calculate aligned object size

Export function that calculates aligned object size
---
 node-eclib.js       | 11 ++++++++++-
 src/cpp/libmain.cpp | 19 +++++++++++++++++--
 src/cpp/libmain.h   |  4 ++++
 3 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/node-eclib.js b/node-eclib.js
index c0ab34e..cb9afe5 100644
--- a/node-eclib.js
+++ b/node-eclib.js
@@ -226,7 +226,16 @@ ECLib.prototype = {
             hd: 0,
             ct: 0
         };
-    }
+    },
+
+    /**
+     * Get alignement size corresponding to a size
+     * @param {Number} objSize - object size
+     * @return {Number} aligned size
+     */
+    getAlignedDataSize: function(objSize) {
+        return addon.EclGetAlignedDataSize(this.ins_id, objSize);
+    },
 }
 
 module.exports = ECLib;
diff --git a/src/cpp/libmain.cpp b/src/cpp/libmain.cpp
index 6c23a02..77419e6 100644
--- a/src/cpp/libmain.cpp
+++ b/src/cpp/libmain.cpp
@@ -103,8 +103,23 @@ NAN_METHOD(EclVerifyStripeMetadata) {
 
 NAN_METHOD(EclGetAlignedDataSize) {
     Nan::HandleScope scope;
-    info.GetReturnValue()
-        .Set(Nan::New("C++ GetAlignedDataSize ").ToLocalChecked());
+
+    if (info.Length() != 2) {
+        Nan::ThrowTypeError("Wrong number of arguments EclGetAlignedDataSize");
+        return ;
+    }
+
+    ec_backend_t instance;
+    uint32_t aligned_size;
+
+    int desc = Nan::To<int>(info[0]).FromJust();
+    int64_t obj_size = Nan::To<int64_t>(info[1]).FromJust();
+
+    instance = liberasurecode_backend_instance_get_by_desc(desc);
+
+    aligned_size = get_aligned_data_size(instance, obj_size);
+
+    info.GetReturnValue().Set(aligned_size);
 }
 
 NAN_METHOD(EclGetMinimumEncodeSize) {
diff --git a/src/cpp/libmain.h b/src/cpp/libmain.h
index a8a542e..f82a250 100644
--- a/src/cpp/libmain.h
+++ b/src/cpp/libmain.h
@@ -28,6 +28,10 @@
 #include <nan.h>
 #include <liberasurecode/erasurecode.h>
 #include <liberasurecode/erasurecode_helpers.h>
+extern "C" {
+#include <liberasurecode/erasurecode_helpers_ext.h>
+#include <liberasurecode/erasurecode_postprocessing.h>
+}
 
 NAN_METHOD(EclCreate);
 NAN_METHOD(EclDestroy);