public void visitFrame()

in org.eclipse.sisu.inject/src/org/eclipse/sisu/space/asm/MethodWriter.java [611:711]
97 lines of code
24 McCabe index (conditional complexity)

    public void visitFrame(final int type, final int nLocal,
            final Object[] local, final int nStack, final Object[] stack) {
        if (!ClassReader.FRAMES || compute == FRAMES) {
            return;
        }

        if (type == Opcodes.F_NEW) {
            if (previousFrame == null) {
                visitImplicitFirstFrame();
            }
            currentLocals = nLocal;
            int frameIndex = startFrame(code.length, nLocal, nStack);
            for (int i = 0; i < nLocal; ++i) {
                if (local[i] instanceof String) {
                    frame[frameIndex++] = Frame.OBJECT
                            | cw.addType((String) local[i]);
                } else if (local[i] instanceof Integer) {
                    frame[frameIndex++] = ((Integer) local[i]).intValue();
                } else {
                    frame[frameIndex++] = Frame.UNINITIALIZED
                            | cw.addUninitializedType("",
                                    ((Label) local[i]).position);
                }
            }
            for (int i = 0; i < nStack; ++i) {
                if (stack[i] instanceof String) {
                    frame[frameIndex++] = Frame.OBJECT
                            | cw.addType((String) stack[i]);
                } else if (stack[i] instanceof Integer) {
                    frame[frameIndex++] = ((Integer) stack[i]).intValue();
                } else {
                    frame[frameIndex++] = Frame.UNINITIALIZED
                            | cw.addUninitializedType("",
                                    ((Label) stack[i]).position);
                }
            }
            endFrame();
        } else {
            int delta;
            if (stackMap == null) {
                stackMap = new ByteVector();
                delta = code.length;
            } else {
                delta = code.length - previousFrameOffset - 1;
                if (delta < 0) {
                    if (type == Opcodes.F_SAME) {
                        return;
                    } else {
                        throw new IllegalStateException();
                    }
                }
            }

            switch (type) {
            case Opcodes.F_FULL:
                currentLocals = nLocal;
                stackMap.putByte(FULL_FRAME).putShort(delta).putShort(nLocal);
                for (int i = 0; i < nLocal; ++i) {
                    writeFrameType(local[i]);
                }
                stackMap.putShort(nStack);
                for (int i = 0; i < nStack; ++i) {
                    writeFrameType(stack[i]);
                }
                break;
            case Opcodes.F_APPEND:
                currentLocals += nLocal;
                stackMap.putByte(SAME_FRAME_EXTENDED + nLocal).putShort(delta);
                for (int i = 0; i < nLocal; ++i) {
                    writeFrameType(local[i]);
                }
                break;
            case Opcodes.F_CHOP:
                currentLocals -= nLocal;
                stackMap.putByte(SAME_FRAME_EXTENDED - nLocal).putShort(delta);
                break;
            case Opcodes.F_SAME:
                if (delta < 64) {
                    stackMap.putByte(delta);
                } else {
                    stackMap.putByte(SAME_FRAME_EXTENDED).putShort(delta);
                }
                break;
            case Opcodes.F_SAME1:
                if (delta < 64) {
                    stackMap.putByte(SAME_LOCALS_1_STACK_ITEM_FRAME + delta);
                } else {
                    stackMap.putByte(SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED)
                            .putShort(delta);
                }
                writeFrameType(stack[0]);
                break;
            }

            previousFrameOffset = code.length;
            ++frameCount;
        }

        maxStack = Math.max(maxStack, nStack);
        maxLocals = Math.max(maxLocals, currentLocals);
    }