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Statistical sampling library for use in virtdata libraries, based on apache commons math 4

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.csv;

import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import java.nio.CharBuffer;

/** Copied from Apache Commons IO. */
class IOUtils {

    /**
     * 

* Copied from Apache Commons IO. *

* The default buffer size ({@value}). */ static final int DEFAULT_BUFFER_SIZE = 1024 * 4; /** *

* Copied from Apache Commons IO. *

* Represents the end-of-file (or stream). * @since 2.5 (made public) */ private static final int EOF = -1; /** * Copies chars from a large (over 2GB) {@code Reader} to an {@code Appendable}. *

* This method buffers the input internally, so there is no need to use a * {@code BufferedReader}. *

* The buffer size is given by {@link #DEFAULT_BUFFER_SIZE}. * * @param input the {@code Reader} to read from * @param output the {@code Appendable} to append to * @return the number of characters copied * @throws NullPointerException if the input or output is null * @throws IOException if an I/O error occurs * @since 2.7 */ static long copy(final Reader input, final Appendable output) throws IOException { return copy(input, output, CharBuffer.allocate(DEFAULT_BUFFER_SIZE)); } /** * Copies chars from a large (over 2GB) {@code Reader} to an {@code Appendable}. *

* This method uses the provided buffer, so there is no need to use a * {@code BufferedReader}. *

* * @param input the {@code Reader} to read from * @param output the {@code Appendable} to write to * @param buffer the buffer to be used for the copy * @return the number of characters copied * @throws NullPointerException if the input or output is null * @throws IOException if an I/O error occurs * @since 2.7 */ static long copy(final Reader input, final Appendable output, final CharBuffer buffer) throws IOException { long count = 0; int n; while (EOF != (n = input.read(buffer))) { buffer.flip(); output.append(buffer, 0, n); count += n; } return count; } /** *

* Copied from Apache Commons IO. *

* Copies chars from a large (over 2GB) {@code Reader} to a {@code Writer}. *

* This method buffers the input internally, so there is no need to use a * {@code BufferedReader}. *

* The buffer size is given by {@link #DEFAULT_BUFFER_SIZE}. * * @param input the {@code Reader} to read from * @param output the {@code Writer} to write to * @return the number of characters copied * @throws NullPointerException if the input or output is null * @throws IOException if an I/O error occurs * @since 1.3 */ static long copyLarge(final Reader input, final Writer output) throws IOException { return copyLarge(input, output, new char[DEFAULT_BUFFER_SIZE]); } /** *

* Copied from Apache Commons IO. *

* Copies chars from a large (over 2GB) {@code Reader} to a {@code Writer}. *

* This method uses the provided buffer, so there is no need to use a * {@code BufferedReader}. *

* * @param input the {@code Reader} to read from * @param output the {@code Writer} to write to * @param buffer the buffer to be used for the copy * @return the number of characters copied * @throws NullPointerException if the input or output is null * @throws IOException if an I/O error occurs * @since 2.2 */ static long copyLarge(final Reader input, final Writer output, final char[] buffer) throws IOException { long count = 0; int n; while (EOF != (n = input.read(buffer))) { output.write(buffer, 0, n); count += n; } return count; } }





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