/*
 *  Copyright 2014 Alexey Andreev.
 *
 *  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 org.teavm.classlib.java.lang;

import java.io.IOException;
import org.teavm.backend.javascript.codegen.SourceWriter;
import org.teavm.backend.javascript.spi.Generator;
import org.teavm.backend.javascript.spi.GeneratorContext;
import org.teavm.model.MethodReference;

public class MathNativeGenerator implements Generator {
    @Override
    public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) throws IOException {
        String name = methodRef.getName();
        if (name.equals("randomImpl")) {
            name = "random";
        }
        function(context, writer, "Math." + name, methodRef.parameterCount());
    }

    private void function(GeneratorContext context, SourceWriter writer, String name, int paramCount)
            throws IOException {
        writer.append("return ").append(name).append("(");
        for (int i = 0; i < paramCount; ++i) {
            if (i > 0) {
                writer.append(",").ws();
            }
            writer.append(context.getParameterName(i + 1));
        }
        writer.append(");").softNewLine();
    }
}

/*
 *  Copyright 2014 Alexey Andreev.
 *
 *  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 org.teavm.classlib.java.lang;

import java.io.IOException;
import org.teavm.backend.javascript.codegen.SourceWriter;
import org.teavm.backend.javascript.spi.Generator;
import org.teavm.backend.javascript.spi.GeneratorContext;
import org.teavm.model.MethodReference;

public class MathNativeGenerator implements Generator {
    @Override
    public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) throws IOException {
        String name = methodRef.getName();
        if (name.endsWith("Impl")) {
            name = name.substring(0, name.length() - 4);
        }
        function(context, writer, "Math." + name, methodRef.parameterCount());
    }

    private void function(GeneratorContext context, SourceWriter writer, String name, int paramCount)
            throws IOException {
        writer.append("return ").append(name).append("(");
        for (int i = 0; i < paramCount; ++i) {
            if (i > 0) {
                writer.append(",").ws();
            }
            writer.append(context.getParameterName(i + 1));
        }
        writer.append(");").softNewLine();
    }
}

Fix Math.pow implementation in JS