From f2c43c74acd66e3b63b2b1f8f51592ab868c771e Mon Sep 17 00:00:00 2001
From: Peli de Halleux <jhalleux@microsoft.com>
Date: Thu, 4 Aug 2016 08:42:47 -0700
Subject: [PATCH] support for start/length in buffer methods

---
 libs/microbit/buffer.cpp | 12 ++++++++----
 libs/microbit/shims.d.ts | 12 ++++++++----
 pxtarget.json            |  2 +-
 3 files changed, 17 insertions(+), 9 deletions(-)

diff --git a/libs/microbit/buffer.cpp b/libs/microbit/buffer.cpp
index 41634e0d..b0ea48a2 100644
--- a/libs/microbit/buffer.cpp
+++ b/libs/microbit/buffer.cpp
@@ -123,21 +123,25 @@ namespace BufferMethods {
     /**
      * Shift buffer left in place, with zero padding.
      * @param offset number of bytes to shift; use negative value to shift right
+     * @param start start offset in buffer. Default is 0.
+     * @param length number of elements in buffer. If negative, length is set as the buffer length minus start. eg: -1
      */
     //%
-    void shift(Buffer buf, int offset)
+    void shift(Buffer buf, int offset, int start = 0, int length = -1)
     {
-        ManagedBuffer(buf).shift(offset);
+        ManagedBuffer(buf).shift(offset, start, length);
     }
 
     /**
      * Rotate buffer left in place.
      * @param offset number of bytes to shift; use negative value to shift right
+     * @param start start offset in buffer. Default is 0.
+     * @param length number of elements in buffer. If negative, length is set as the buffer length minus start. eg: -1
      */
     //%
-    void rotate(Buffer buf, int offset)
+    void rotate(Buffer buf, int offset, int start = 0, int length = -1)
     {
-        ManagedBuffer(buf).rotate(offset);
+        ManagedBuffer(buf).rotate(offset, start, length);
     }
 
     // int readBytes(uint8_t *dst, int offset, int length, bool swapBytes = false) const;
diff --git a/libs/microbit/shims.d.ts b/libs/microbit/shims.d.ts
index 4974158a..99102c46 100644
--- a/libs/microbit/shims.d.ts
+++ b/libs/microbit/shims.d.ts
@@ -635,16 +635,20 @@ declare interface Buffer {
     /**
      * Shift buffer left in place, with zero padding.
      * @param offset number of bytes to shift; use negative value to shift right
+     * @param start start offset in buffer. Default is 0.
+     * @param length number of elements in buffer. If negative, length is set as the buffer length minus start. eg: -1
      */
-    //% shim=BufferMethods::shift
-    shift(offset: number): void;
+    //% start.defl=0 length.defl=-1 shim=BufferMethods::shift
+    shift(offset: number, start?: number, length?: number): void;
 
     /**
      * Rotate buffer left in place.
      * @param offset number of bytes to shift; use negative value to shift right
+     * @param start start offset in buffer. Default is 0.
+     * @param length number of elements in buffer. If negative, length is set as the buffer length minus start. eg: -1
      */
-    //% shim=BufferMethods::rotate
-    rotate(offset: number): void;
+    //% start.defl=0 length.defl=-1 shim=BufferMethods::rotate
+    rotate(offset: number, start?: number, length?: number): void;
 
     /**
      * Write contents of `src` at `dstOffset` in current buffer.
diff --git a/pxtarget.json b/pxtarget.json
index cbd3ab2b..d6f47755 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -70,7 +70,7 @@
         "yottaTarget": "bbc-microbit-classic-gcc",
         "yottaCorePackage": "pxt-microbit-core",
         "githubCorePackage": "microsoft/pxt-microbit-core",
-        "gittag": "v0.1.11",
+        "gittag": "v0.2.2",
         "serviceId": "ws"
     },
     "serial": {