/*

 * Copyright (c) 2011, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package jdk.vm.ci.hotspot;

import static java.util.FormattableFlags.ALTERNATE;

import static java.util.FormattableFlags.LEFT_JUSTIFY;

import static java.util.FormattableFlags.UPPERCASE;

import java.util.Formattable;

import java.util.Formatter;

import jdk.vm.ci.meta.JavaMethod;

import jdk.vm.ci.meta.ResolvedJavaMethod;

abstract class HotSpotMethod implements JavaMethod, Formattable {

    public static String applyFormattingFlagsAndWidth(String s, int flags, int width) {

        if (flags == 0 && width < 0) {

            return s;

        }

        StringBuilder sb = new StringBuilder(s);

        // apply width and justification

        int len = sb.length();

        if (len < width) {

            for (int i = 0; i < width - len; i++) {

                if ((flags & LEFT_JUSTIFY) == LEFT_JUSTIFY) {

                    sb.append(' ');

                } else {

                    sb.insert(0, ' ');

                }

            }

        }

        String res = sb.toString();

        if ((flags & UPPERCASE) == UPPERCASE) {

            res = res.toUpperCase();

        }

        return res;

    }

    /**

     * Controls whether {@link #toString()} includes the qualified or simple name of the class in

     * which the method is declared.

     */

    public static final boolean FULLY_QUALIFIED_METHOD_NAME = false;

    @Override

    public final String toString() {

        char h = FULLY_QUALIFIED_METHOD_NAME ? 'H' : 'h';

        String suffix = this instanceof ResolvedJavaMethod ? "" : ", unresolved";

        String fmt = String.format("HotSpotMethod<%%%c.%%n(%%p)%s>", h, suffix);

        return format(fmt);

    }

    @Override

    public void formatTo(Formatter formatter, int flags, int width, int precision) {

        String base = (flags & ALTERNATE) == ALTERNATE ? getName() : toString();

        formatter.format(applyFormattingFlagsAndWidth(base, flags & ~ALTERNATE, width));

    }

}