Add Buffer; go to core v0.1.5

libs/microbit/buffer.cpp

@@ -0,0 +1,72 @@
+#include "ksbit.h"
+
+//% indexerGet=BufferMethods::getByte indexerSet=BufferMethods::setByte
+namespace BufferMethods {
+    //%
+    int getByte(Buffer buf, int off) {
+        return max(ManagedBuffer(buf).getByte(off), 0);
+    }
+
+    //%
+    void setByte(Buffer buf, int off, int v) {
+        ManagedBuffer(buf).setByte(off, v);
+    }
+
+    /** Returns the length of a Buffer object. */
+    //% property
+    int length(Buffer s) {
+        return s->length;
+    }
+
+    /**
+     * Fill (a fragment) of the buffer with given value.
+     */
+    //%
+    void fill(Buffer buf, int value, int offset = 0, int length = -1)
+    {
+        ManagedBuffer(buf).fill(value, offset, length);
+    }
+
+    /**
+     * Return a copy of a fragment of a buffer.
+     */
+    //%
+    Buffer slice(Buffer buf, int offset = 0, int length = -1)
+    {
+        return ManagedBuffer(buf).slice(offset, length).leakData();
+    }
+
+    /**
+     * Shift buffer left in place, with zero padding.
+     * @param offset number of bytes to shift; use negative value to shift right
+     */
+    //%
+    void shift(Buffer buf, int offset)
+    {
+        ManagedBuffer(buf).shift(offset);
+    }
+
+    /**
+     * Rotate buffer left in place.
+     * @param offset number of bytes to shift; use negative value to shift right
+     */
+    //%
+    void rotate(Buffer buf, int offset)
+    {
+        ManagedBuffer(buf).rotate(offset);
+    }
+
+    // int readBytes(uint8_t *dst, int offset, int length, bool swapBytes = false) const;
+    // int writeBytes(int dstOffset, uint8_t *src, int length, bool swapBytes = false);
+
+    /**
+     * Write contents of `src` at `dstOffset` in current buffer.
+     */
+    //%
+    void write(Buffer buf, int dstOffset, Buffer src)
+    {
+        //Not supported, we only do up to 4 args :/
+        //void write(Buffer buf, int dstOffset, Buffer src, int srcOffset = 0, int length = -1)
+        ManagedBuffer(buf).writeBuffer(dstOffset, ManagedBuffer(src), 0, -1);
+    }
+}