First draft of storage APIs (#122)

* First draft of storage APIs

* bumped pxt-core

* using fixed instances to seprate temp from permanent

* send console to storage

* sim support

* missing sim stubs

* adding storage blocks

* more sim support

* remove storage from default package

* fix rendering of ms

* render raw ms

* slize at better place

* duplicate bundled dir

* refactor limit

* simplify limit logic

libs/core/_locales/core-jsdoc-strings.json

@@ -10,10 +10,12 @@
   "MMap.getNumber": "Read a number in specified format from the buffer.",
   "MMap.ioctl": "Perform ioctl(2) on the underlaying file",
   "MMap.length": "Returns the length of a Buffer object.",
+  "MMap.lseek": "Set pointer on the underlaying file.",
   "MMap.read": "Perform read(2) on the underlaying file",
   "MMap.setNumber": "Write a number in specified format in the buffer.",
   "MMap.slice": "Read a range of bytes into a buffer.",
   "MMap.write": "Perform write(2) on the underlaying file",
+  "SeekWhence": "Mode for lseek()",
   "brick.Button": "Generic button class, for device buttons and sensors.",
   "brick.Button.isPressed": "Check if button is currently pressed or not.",
   "brick.Button.onEvent": "Do something when a button or sensor is clicked, up or down.",

libs/core/enums.d.ts

@@ -1,6 +1,17 @@
 // Auto-generated. Do not edit.
 
 
+    /**
+     * Mode for lseek()
+     */
+
+    declare const enum SeekWhence {
+    Set = 0,
+    Current = 1,
+    End = 2,
+    }
+
+
     /**
      * Drawing modes
      */

libs/core/mmap.cpp

@@ -7,6 +7,16 @@
 #include <fcntl.h>
 #include <sys/ioctl.h>
 
+/**
+* Mode for lseek()
+*/
+enum class SeekWhence {
+    Set = 0,
+    Current = 1,
+    End = 2,
+};
+
+
 namespace pxt {
 PXT_VTABLE_CTOR(MMap) {
     length = 0;
@@ -111,4 +121,10 @@ int read(MMap *mmap, Buffer data) {
     return ::read(mmap->fd, data->data, data->length);
 }
 
+/** Set pointer on the underlaying file. */
+//%
+int lseek(MMap *mmap, int offset, SeekWhence whence) {
+    return ::lseek(mmap->fd, offset, (int)whence);
+}
+
 }

libs/core/shims.d.ts

@@ -41,6 +41,10 @@ declare interface MMap {
     /** Perform read(2) on the underlaying file */
     //% shim=MMapMethods::read
     read(data: Buffer): int32;
+
+    /** Set pointer on the underlaying file. */
+    //% shim=MMapMethods::lseek
+    lseek(offset: int32, whence: SeekWhence): int32;
 }
 declare namespace control {