1 package com.tapina.robe.swi.clib.string;
2
3 import com.tapina.robe.runtime.ByteArray;
4 import com.tapina.robe.runtime.Environment;
5 import com.tapina.robe.runtime.MemoryMap;
6 import com.tapina.robe.swi.clib.Stub;
7
8 /***
9 * This function copies a3 characters from a2 to a1.
10 * The areas to be copied may overlap, because it first of all copies from a2 to a temporary buffer and then
11 * copies from there to a1. This makes it slower than memcpy.
12 * Returns: a1
13 */
14 public class MemMove extends Stub {
15 public void executeStub(Environment environment) {
16 final MemoryMap memoryMap = environment.getMemoryMap();
17 final int[] R = environment.getCpu().R;
18 final int count = R[2];
19 final byte[] data = memoryMap.getBytes(R[1], count);
20 final ByteArray ptr1 = memoryMap.getByteArray(R[0], count, true);
21 System.arraycopy(data, 0, ptr1.getArray(), ptr1.getOffset(), count);
22 }
23 }