am a1672140: am d3036f7e: am d4805af6: Merge "use BufferedInputStream in...

package android.os;

import java.io.BufferedInputStream;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

     */

    public static String readTextFile(File file, int max, String ellipsis) throws IOException {

        InputStream input = new FileInputStream(file);

        // wrapping a BufferedInputStream around it because when reading /proc with unbuffered

        // input stream, bytes read not equal to buffer size is not necessarily the correct

        // indication for EOF; but it is true for BufferedInputStream due to its implementation.

        BufferedInputStream bis = new BufferedInputStream(input);

        try {

            long size = file.length();

            if (max > 0 || (size > 0 && max == 0)) {  // "head" mode: read the first N bytes

                if (size > 0 && (max == 0 || size < max)) max = (int) size;

                byte[] data = new byte[max + 1];

                int length = input.read(data);

                int length = bis.read(data);

                if (length <= 0) return "";

                if (length <= max) return new String(data, 0, length);

                if (ellipsis == null) return new String(data, 0, max);

                    if (last != null) rolled = true;

                    byte[] tmp = last; last = data; data = tmp;

                    if (data == null) data = new byte[-max];

                    len = input.read(data);

                    len = bis.read(data);

                } while (len == data.length);

                if (last == null && len <= 0) return "";

                int len;

                byte[] data = new byte[1024];

                do {

                    len = input.read(data);

                    len = bis.read(data);

                    if (len > 0) contents.write(data, 0, len);

                } while (len == data.length);

                return contents.toString();

            }

        } finally {

            bis.close();

            input.close();

        }

    }