CArray of strings on JVM.

src/vm/jvm/runtime/org/perl6/nqp/runtime/NativeCallOps.java

@@ -129,7 +129,7 @@ private static Class javaType(ThreadContext tc, ArgType target) {
         return null;
     }
 
-    private static Object toJNAType(ThreadContext tc, SixModelObject o, ArgType target) {
+    public static Object toJNAType(ThreadContext tc, SixModelObject o, ArgType target) {
         o = Ops.decont(o, tc);
         switch (target) {
         case CHAR:
@@ -170,7 +170,7 @@ private static Object toJNAType(ThreadContext tc, SixModelObject o, ArgType targ
         return null;
     }
 
-    private static SixModelObject toNQPType(ThreadContext tc, ArgType target, SixModelObject type, Object o) {
+    public static SixModelObject toNQPType(ThreadContext tc, ArgType target, SixModelObject type, Object o) {
         SixModelObject nqpobj = null;
         if (target != ArgType.VOID)
             nqpobj = type.st.REPR.allocate(tc, type.st);

src/vm/jvm/runtime/org/perl6/nqp/sixmodel/reprs/CArray.java

@@ -83,6 +83,10 @@ else if (ss.bits == 64) {
             }
             data.elem_kind = ElemKind.NUMERIC;
         }
+        else if ((ss.can_box & StorageSpec.CAN_BOX_STR) != 0) {
+            data.jna_size = Native.POINTER_SIZE;
+            data.elem_kind = ElemKind.STRING;
+        }
         else {
             /* TODO: Remaining cases. */
             ExceptionHandling.dieInternal(tc, "CArray only handles ints and nums so far.");

src/vm/jvm/runtime/org/perl6/nqp/sixmodel/reprs/CArrayInstance.java

@@ -1,18 +1,24 @@
 package org.perl6.nqp.sixmodel.reprs;
 
+import java.util.Arrays;
+
 import com.sun.jna.Memory;
 import com.sun.jna.Native;
 import com.sun.jna.Pointer;
 
 import org.perl6.nqp.runtime.ExceptionHandling;
+import org.perl6.nqp.runtime.NativeCallOps;
+import org.perl6.nqp.runtime.Ops;
 import org.perl6.nqp.runtime.ThreadContext;
 
 import org.perl6.nqp.sixmodel.SixModelObject;
 
 import org.perl6.nqp.sixmodel.reprs.CArrayREPRData.ElemKind;
+import org.perl6.nqp.sixmodel.reprs.NativeCallBody.ArgType;
 
 public class CArrayInstance extends SixModelObject {
     public Pointer storage;
+    public SixModelObject[] child_objs;
     public boolean managed;
     public long allocated;
     public long elems;
@@ -64,6 +70,45 @@ else if (repr_data.elem_size == 64) {
         }
     }
 
+    public SixModelObject at_pos_boxed(ThreadContext tc, long index) {
+        CArrayREPRData repr_data = (CArrayREPRData) st.REPRData;
+        int intidx = (int) index;
+
+        /* TODO: Die if this is a NUMERIC/INTEGER CArray. */
+
+        if (managed) {
+            if (index >= elems)
+                return repr_data.elem_type;
+
+            if (child_objs[intidx] != null) {
+                return child_objs[intidx];
+            }
+            else {
+                SixModelObject obj = makeObject(tc, storage.getPointer(index*repr_data.jna_size));
+                child_objs[intidx] = obj;
+                return obj;
+            }
+        }
+        else {
+            if (index >= allocated)
+                expand(tc, index+1);
+
+            if (child_objs[intidx] != null)
+                return child_objs[intidx];
+            else {
+                Pointer ptr = storage.getPointer(index*repr_data.jna_size);
+                if (ptr != null) {
+                    SixModelObject obj = makeObject(tc, ptr);
+                    child_objs[intidx] = obj;
+                    return obj;
+                }
+                else {
+                    return repr_data.elem_type;
+                }
+            }
+        }
+    }
+
     public void bind_pos_native(ThreadContext tc, long index) {
         CArrayREPRData repr_data = (CArrayREPRData) st.REPRData;
 
@@ -100,6 +145,31 @@ else if (repr_data.elem_size == 64) {
         }
     }
 
+    public void bind_pos_boxed(ThreadContext tc, long index, SixModelObject value) {
+        CArrayREPRData repr_data = (CArrayREPRData) st.REPRData;
+        int intidx = (int) index;
+
+        /* TODO: Die if this is a NUMERIC/INTEGER CArray. */
+        if (index >= allocated)
+            expand(tc, index+1);
+
+        Pointer ptr = null;
+        if (Ops.isconcrete(value, tc) != 0) {
+            switch (repr_data.elem_kind) {
+            case STRING:
+                byte[] bytes = Native.toByteArray(value.get_str(tc));
+                ptr = new Memory(bytes.length);
+                ptr.write(0, bytes, 0, bytes.length);
+                break;
+            default:
+                ExceptionHandling.dieInternal(tc, "CArray.bind_pos_boxed reached its default case. This should never happen.");
+            }
+        }
+
+        child_objs[intidx] = value;
+        storage.setPointer(index*repr_data.jna_size, ptr);
+    }
+
     private void expand(ThreadContext tc, long new_size) {
         CArrayREPRData repr_data = (CArrayREPRData) st.REPRData;
 
@@ -111,6 +181,33 @@ private void expand(ThreadContext tc, long new_size) {
             }
             storage = new_storage;
         }
+
+        boolean complex = repr_data.elem_kind == ElemKind.CARRAY
+            || repr_data.elem_kind == ElemKind.CPOINTER
+            || repr_data.elem_kind == ElemKind.CSTRUCT
+            || repr_data.elem_kind == ElemKind.STRING;
+
+        if (complex) {
+            child_objs = child_objs == null?
+                new SixModelObject[(int) new_size]:
+                Arrays.copyOf(child_objs, (int) new_size);
+        }
+
         elems = new_size;
+        allocated = new_size;
+    }
+
+    private SixModelObject makeObject(ThreadContext tc, Pointer ptr) {
+        CArrayREPRData repr_data = (CArrayREPRData) st.REPRData;
+
+        switch (repr_data.elem_kind) {
+        case STRING:
+            return NativeCallOps.toNQPType(tc, ArgType.UTF8STR, repr_data.elem_type, ptr.getString(0));
+        default:
+            ExceptionHandling.dieInternal(tc, "CArray can only makeObject strings");
+        }
+
+        /* And a dummy return statement to placate Java's flow analysis. */
+        return null;
     }
 }