/**
 * Copyright 2013, Landz and its contributors. All rights reserved.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */

package z.znr.invoke.linux.x64;

import z.znr.invoke.types.SignatureType;

/**
 *
 */
class LocalVariableAllocator {
    private int nextIndex;

    LocalVariableAllocator(SignatureType[] parameterTypes) {
        this.nextIndex = AsmUtil.calculateLocalVariableSpace(parameterTypes) + 1;
    }

    LocalVariableAllocator(Class... parameterTypes) {
        this.nextIndex = AsmUtil.calculateLocalVariableSpace(parameterTypes) + 1;
    }

    LocalVariableAllocator(int nextIndex) {
        this.nextIndex = nextIndex;
    }

    LocalVariable allocate(Class type) {
        LocalVariable var = new LocalVariable(type, nextIndex);
        this.nextIndex += AsmUtil.calculateLocalVariableSpace(type);
        return var;
    }

    int getSpaceUsed() {
        return nextIndex;
    }
}