/
FileUtils.java
1456 lines (1355 loc) · 47.1 KB
/
FileUtils.java
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package com.blankj.utilcode.util;
import android.content.ContentResolver;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.net.Uri;
import android.os.Build;
import android.os.StatFs;
import android.text.TextUtils;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileFilter;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.security.DigestInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.net.ssl.HttpsURLConnection;
/**
* <pre>
* author: Blankj
* blog : http://blankj.com
* time : 2016/05/03
* desc : utils about file
* </pre>
*/
public final class FileUtils {
private static final String LINE_SEP = System.getProperty("line.separator");
private FileUtils() {
throw new UnsupportedOperationException("u can't instantiate me...");
}
/**
* Return the file by path.
*
* @param filePath The path of file.
* @return the file
*/
public static File getFileByPath(final String filePath) {
return UtilsBridge.isSpace(filePath) ? null : new File(filePath);
}
/**
* Return whether the file exists.
*
* @param file The file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isFileExists(final File file) {
if (file == null) return false;
if (file.exists()) {
return true;
}
return isFileExists(file.getAbsolutePath());
}
/**
* Return whether the file exists.
*
* @param filePath The path of file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isFileExists(final String filePath) {
File file = getFileByPath(filePath);
if (file == null) return false;
if (file.exists()) {
return true;
}
return isFileExistsApi29(filePath);
}
private static boolean isFileExistsApi29(String filePath) {
if (Build.VERSION.SDK_INT >= 29) {
try {
Uri uri = Uri.parse(filePath);
ContentResolver cr = Utils.getApp().getContentResolver();
AssetFileDescriptor afd = cr.openAssetFileDescriptor(uri, "r");
if (afd == null) return false;
try {
afd.close();
} catch (IOException ignore) {
}
} catch (FileNotFoundException e) {
return false;
}
return true;
}
return false;
}
/**
* Rename the file.
*
* @param filePath The path of file.
* @param newName The new name of file.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean rename(final String filePath, final String newName) {
return rename(getFileByPath(filePath), newName);
}
/**
* Rename the file.
*
* @param file The file.
* @param newName The new name of file.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean rename(final File file, final String newName) {
// file is null then return false
if (file == null) return false;
// file doesn't exist then return false
if (!file.exists()) return false;
// the new name is space then return false
if (UtilsBridge.isSpace(newName)) return false;
// the new name equals old name then return true
if (newName.equals(file.getName())) return true;
File newFile = new File(file.getParent() + File.separator + newName);
// the new name of file exists then return false
return !newFile.exists()
&& file.renameTo(newFile);
}
/**
* Return whether it is a directory.
*
* @param dirPath The path of directory.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isDir(final String dirPath) {
return isDir(getFileByPath(dirPath));
}
/**
* Return whether it is a directory.
*
* @param file The file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isDir(final File file) {
return file != null && file.exists() && file.isDirectory();
}
/**
* Return whether it is a file.
*
* @param filePath The path of file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isFile(final String filePath) {
return isFile(getFileByPath(filePath));
}
/**
* Return whether it is a file.
*
* @param file The file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isFile(final File file) {
return file != null && file.exists() && file.isFile();
}
/**
* Create a directory if it doesn't exist, otherwise do nothing.
*
* @param dirPath The path of directory.
* @return {@code true}: exists or creates successfully<br>{@code false}: otherwise
*/
public static boolean createOrExistsDir(final String dirPath) {
return createOrExistsDir(getFileByPath(dirPath));
}
/**
* Create a directory if it doesn't exist, otherwise do nothing.
*
* @param file The file.
* @return {@code true}: exists or creates successfully<br>{@code false}: otherwise
*/
public static boolean createOrExistsDir(final File file) {
return file != null && (file.exists() ? file.isDirectory() : file.mkdirs());
}
/**
* Create a file if it doesn't exist, otherwise do nothing.
*
* @param filePath The path of file.
* @return {@code true}: exists or creates successfully<br>{@code false}: otherwise
*/
public static boolean createOrExistsFile(final String filePath) {
return createOrExistsFile(getFileByPath(filePath));
}
/**
* Create a file if it doesn't exist, otherwise do nothing.
*
* @param file The file.
* @return {@code true}: exists or creates successfully<br>{@code false}: otherwise
*/
public static boolean createOrExistsFile(final File file) {
if (file == null) return false;
if (file.exists()) return file.isFile();
if (!createOrExistsDir(file.getParentFile())) return false;
try {
return file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* Create a file if it doesn't exist, otherwise delete old file before creating.
*
* @param filePath The path of file.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean createFileByDeleteOldFile(final String filePath) {
return createFileByDeleteOldFile(getFileByPath(filePath));
}
/**
* Create a file if it doesn't exist, otherwise delete old file before creating.
*
* @param file The file.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean createFileByDeleteOldFile(final File file) {
if (file == null) return false;
// file exists and unsuccessfully delete then return false
if (file.exists() && !file.delete()) return false;
if (!createOrExistsDir(file.getParentFile())) return false;
try {
return file.createNewFile();
} catch (IOException e) {
e.printStackTrace();
return false;
}
}
/**
* Copy the directory or file.
*
* @param srcPath The path of source.
* @param destPath The path of destination.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean copy(final String srcPath,
final String destPath) {
return copy(getFileByPath(srcPath), getFileByPath(destPath), null);
}
/**
* Copy the directory or file.
*
* @param srcPath The path of source.
* @param destPath The path of destination.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean copy(final String srcPath,
final String destPath,
final OnReplaceListener listener) {
return copy(getFileByPath(srcPath), getFileByPath(destPath), listener);
}
/**
* Copy the directory or file.
*
* @param src The source.
* @param dest The destination.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean copy(final File src,
final File dest) {
return copy(src, dest, null);
}
/**
* Copy the directory or file.
*
* @param src The source.
* @param dest The destination.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean copy(final File src,
final File dest,
final OnReplaceListener listener) {
if (src == null) return false;
if (src.isDirectory()) {
return copyDir(src, dest, listener);
}
return copyFile(src, dest, listener);
}
/**
* Copy the directory.
*
* @param srcDir The source directory.
* @param destDir The destination directory.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
private static boolean copyDir(final File srcDir,
final File destDir,
final OnReplaceListener listener) {
return copyOrMoveDir(srcDir, destDir, listener, false);
}
/**
* Copy the file.
*
* @param srcFile The source file.
* @param destFile The destination file.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
private static boolean copyFile(final File srcFile,
final File destFile,
final OnReplaceListener listener) {
return copyOrMoveFile(srcFile, destFile, listener, false);
}
/**
* Move the directory or file.
*
* @param srcPath The path of source.
* @param destPath The path of destination.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean move(final String srcPath,
final String destPath) {
return move(getFileByPath(srcPath), getFileByPath(destPath), null);
}
/**
* Move the directory or file.
*
* @param srcPath The path of source.
* @param destPath The path of destination.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean move(final String srcPath,
final String destPath,
final OnReplaceListener listener) {
return move(getFileByPath(srcPath), getFileByPath(destPath), listener);
}
/**
* Move the directory or file.
*
* @param src The source.
* @param dest The destination.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean move(final File src,
final File dest) {
return move(src, dest, null);
}
/**
* Move the directory or file.
*
* @param src The source.
* @param dest The destination.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean move(final File src,
final File dest,
final OnReplaceListener listener) {
if (src == null) return false;
if (src.isDirectory()) {
return moveDir(src, dest, listener);
}
return moveFile(src, dest, listener);
}
/**
* Move the directory.
*
* @param srcDir The source directory.
* @param destDir The destination directory.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean moveDir(final File srcDir,
final File destDir,
final OnReplaceListener listener) {
return copyOrMoveDir(srcDir, destDir, listener, true);
}
/**
* Move the file.
*
* @param srcFile The source file.
* @param destFile The destination file.
* @param listener The replace listener.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean moveFile(final File srcFile,
final File destFile,
final OnReplaceListener listener) {
return copyOrMoveFile(srcFile, destFile, listener, true);
}
private static boolean copyOrMoveDir(final File srcDir,
final File destDir,
final OnReplaceListener listener,
final boolean isMove) {
if (srcDir == null || destDir == null) return false;
// destDir's path locate in srcDir's path then return false
String srcPath = srcDir.getPath() + File.separator;
String destPath = destDir.getPath() + File.separator;
if (destPath.contains(srcPath)) return false;
if (!srcDir.exists() || !srcDir.isDirectory()) return false;
if (!createOrExistsDir(destDir)) return false;
File[] files = srcDir.listFiles();
if (files != null && files.length > 0) {
for (File file : files) {
File oneDestFile = new File(destPath + file.getName());
if (file.isFile()) {
if (!copyOrMoveFile(file, oneDestFile, listener, isMove)) return false;
} else if (file.isDirectory()) {
if (!copyOrMoveDir(file, oneDestFile, listener, isMove)) return false;
}
}
}
return !isMove || deleteDir(srcDir);
}
private static boolean copyOrMoveFile(final File srcFile,
final File destFile,
final OnReplaceListener listener,
final boolean isMove) {
if (srcFile == null || destFile == null) return false;
// srcFile equals destFile then return false
if (srcFile.equals(destFile)) return false;
// srcFile doesn't exist or isn't a file then return false
if (!srcFile.exists() || !srcFile.isFile()) return false;
if (destFile.exists()) {
if (listener == null || listener.onReplace(srcFile, destFile)) {// require delete the old file
if (!destFile.delete()) {// unsuccessfully delete then return false
return false;
}
} else {
return true;
}
}
if (!createOrExistsDir(destFile.getParentFile())) return false;
try {
return UtilsBridge.writeFileFromIS(destFile.getAbsolutePath(), new FileInputStream(srcFile))
&& !(isMove && !deleteFile(srcFile));
} catch (FileNotFoundException e) {
e.printStackTrace();
return false;
}
}
/**
* Delete the directory.
*
* @param filePath The path of file.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean delete(final String filePath) {
return delete(getFileByPath(filePath));
}
/**
* Delete the directory.
*
* @param file The file.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean delete(final File file) {
if (file == null) return false;
if (file.isDirectory()) {
return deleteDir(file);
}
return deleteFile(file);
}
/**
* Delete the directory.
*
* @param dir The directory.
* @return {@code true}: success<br>{@code false}: fail
*/
private static boolean deleteDir(final File dir) {
if (dir == null) return false;
// dir doesn't exist then return true
if (!dir.exists()) return true;
// dir isn't a directory then return false
if (!dir.isDirectory()) return false;
File[] files = dir.listFiles();
if (files != null && files.length > 0) {
for (File file : files) {
if (file.isFile()) {
if (!file.delete()) return false;
} else if (file.isDirectory()) {
if (!deleteDir(file)) return false;
}
}
}
return dir.delete();
}
/**
* Delete the file.
*
* @param file The file.
* @return {@code true}: success<br>{@code false}: fail
*/
private static boolean deleteFile(final File file) {
return file != null && (!file.exists() || file.isFile() && file.delete());
}
/**
* Delete the all in directory.
*
* @param dirPath The path of directory.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean deleteAllInDir(final String dirPath) {
return deleteAllInDir(getFileByPath(dirPath));
}
/**
* Delete the all in directory.
*
* @param dir The directory.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean deleteAllInDir(final File dir) {
return deleteFilesInDirWithFilter(dir, new FileFilter() {
@Override
public boolean accept(File pathname) {
return true;
}
});
}
/**
* Delete all files in directory.
*
* @param dirPath The path of directory.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean deleteFilesInDir(final String dirPath) {
return deleteFilesInDir(getFileByPath(dirPath));
}
/**
* Delete all files in directory.
*
* @param dir The directory.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean deleteFilesInDir(final File dir) {
return deleteFilesInDirWithFilter(dir, new FileFilter() {
@Override
public boolean accept(File pathname) {
return pathname.isFile();
}
});
}
/**
* Delete all files that satisfy the filter in directory.
*
* @param dirPath The path of directory.
* @param filter The filter.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean deleteFilesInDirWithFilter(final String dirPath,
final FileFilter filter) {
return deleteFilesInDirWithFilter(getFileByPath(dirPath), filter);
}
/**
* Delete all files that satisfy the filter in directory.
*
* @param dir The directory.
* @param filter The filter.
* @return {@code true}: success<br>{@code false}: fail
*/
public static boolean deleteFilesInDirWithFilter(final File dir, final FileFilter filter) {
if (dir == null || filter == null) return false;
// dir doesn't exist then return true
if (!dir.exists()) return true;
// dir isn't a directory then return false
if (!dir.isDirectory()) return false;
File[] files = dir.listFiles();
if (files != null && files.length != 0) {
for (File file : files) {
if (filter.accept(file)) {
if (file.isFile()) {
if (!file.delete()) return false;
} else if (file.isDirectory()) {
if (!deleteDir(file)) return false;
}
}
}
}
return true;
}
/**
* Return the files in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dirPath The path of directory.
* @return the files in directory
*/
public static List<File> listFilesInDir(final String dirPath) {
return listFilesInDir(dirPath, null);
}
/**
* Return the files in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dir The directory.
* @return the files in directory
*/
public static List<File> listFilesInDir(final File dir) {
return listFilesInDir(dir, null);
}
/**
* Return the files in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dirPath The path of directory.
* @param comparator The comparator to determine the order of the list.
* @return the files in directory
*/
public static List<File> listFilesInDir(final String dirPath, Comparator<File> comparator) {
return listFilesInDir(getFileByPath(dirPath), false, comparator);
}
/**
* Return the files in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dir The directory.
* @param comparator The comparator to determine the order of the list.
* @return the files in directory
*/
public static List<File> listFilesInDir(final File dir, Comparator<File> comparator) {
return listFilesInDir(dir, false, comparator);
}
/**
* Return the files in directory.
*
* @param dirPath The path of directory.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @return the files in directory
*/
public static List<File> listFilesInDir(final String dirPath, final boolean isRecursive) {
return listFilesInDir(getFileByPath(dirPath), isRecursive);
}
/**
* Return the files in directory.
*
* @param dir The directory.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @return the files in directory
*/
public static List<File> listFilesInDir(final File dir, final boolean isRecursive) {
return listFilesInDir(dir, isRecursive, null);
}
/**
* Return the files in directory.
*
* @param dirPath The path of directory.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @param comparator The comparator to determine the order of the list.
* @return the files in directory
*/
public static List<File> listFilesInDir(final String dirPath,
final boolean isRecursive,
final Comparator<File> comparator) {
return listFilesInDir(getFileByPath(dirPath), isRecursive, comparator);
}
/**
* Return the files in directory.
*
* @param dir The directory.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @param comparator The comparator to determine the order of the list.
* @return the files in directory
*/
public static List<File> listFilesInDir(final File dir,
final boolean isRecursive,
final Comparator<File> comparator) {
return listFilesInDirWithFilter(dir, new FileFilter() {
@Override
public boolean accept(File pathname) {
return true;
}
}, isRecursive, comparator);
}
/**
* Return the files that satisfy the filter in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dirPath The path of directory.
* @param filter The filter.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final String dirPath,
final FileFilter filter) {
return listFilesInDirWithFilter(getFileByPath(dirPath), filter);
}
/**
* Return the files that satisfy the filter in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dir The directory.
* @param filter The filter.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final File dir,
final FileFilter filter) {
return listFilesInDirWithFilter(dir, filter, false, null);
}
/**
* Return the files that satisfy the filter in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dirPath The path of directory.
* @param filter The filter.
* @param comparator The comparator to determine the order of the list.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final String dirPath,
final FileFilter filter,
final Comparator<File> comparator) {
return listFilesInDirWithFilter(getFileByPath(dirPath), filter, comparator);
}
/**
* Return the files that satisfy the filter in directory.
* <p>Doesn't traverse subdirectories</p>
*
* @param dir The directory.
* @param filter The filter.
* @param comparator The comparator to determine the order of the list.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final File dir,
final FileFilter filter,
final Comparator<File> comparator) {
return listFilesInDirWithFilter(dir, filter, false, comparator);
}
/**
* Return the files that satisfy the filter in directory.
*
* @param dirPath The path of directory.
* @param filter The filter.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final String dirPath,
final FileFilter filter,
final boolean isRecursive) {
return listFilesInDirWithFilter(getFileByPath(dirPath), filter, isRecursive);
}
/**
* Return the files that satisfy the filter in directory.
*
* @param dir The directory.
* @param filter The filter.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final File dir,
final FileFilter filter,
final boolean isRecursive) {
return listFilesInDirWithFilter(dir, filter, isRecursive, null);
}
/**
* Return the files that satisfy the filter in directory.
*
* @param dirPath The path of directory.
* @param filter The filter.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @param comparator The comparator to determine the order of the list.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final String dirPath,
final FileFilter filter,
final boolean isRecursive,
final Comparator<File> comparator) {
return listFilesInDirWithFilter(getFileByPath(dirPath), filter, isRecursive, comparator);
}
/**
* Return the files that satisfy the filter in directory.
*
* @param dir The directory.
* @param filter The filter.
* @param isRecursive True to traverse subdirectories, false otherwise.
* @param comparator The comparator to determine the order of the list.
* @return the files that satisfy the filter in directory
*/
public static List<File> listFilesInDirWithFilter(final File dir,
final FileFilter filter,
final boolean isRecursive,
final Comparator<File> comparator) {
List<File> files = listFilesInDirWithFilterInner(dir, filter, isRecursive);
if (comparator != null) {
Collections.sort(files, comparator);
}
return files;
}
private static List<File> listFilesInDirWithFilterInner(final File dir,
final FileFilter filter,
final boolean isRecursive) {
List<File> list = new ArrayList<>();
if (!isDir(dir)) return list;
File[] files = dir.listFiles();
if (files != null && files.length > 0) {
for (File file : files) {
if (filter.accept(file)) {
list.add(file);
}
if (isRecursive && file.isDirectory()) {
list.addAll(listFilesInDirWithFilterInner(file, filter, true));
}
}
}
return list;
}
/**
* Return the time that the file was last modified.
*
* @param filePath The path of file.
* @return the time that the file was last modified
*/
public static long getFileLastModified(final String filePath) {
return getFileLastModified(getFileByPath(filePath));
}
/**
* Return the time that the file was last modified.
*
* @param file The file.
* @return the time that the file was last modified
*/
public static long getFileLastModified(final File file) {
if (file == null) return -1;
return file.lastModified();
}
/**
* Return the charset of file simply.
*
* @param filePath The path of file.
* @return the charset of file simply
*/
public static String getFileCharsetSimple(final String filePath) {
return getFileCharsetSimple(getFileByPath(filePath));
}
/**
* Return the charset of file simply.
*
* @param file The file.
* @return the charset of file simply
*/
public static String getFileCharsetSimple(final File file) {
if (file == null) return "";
if (isUtf8(file)) return "UTF-8";
int p = 0;
InputStream is = null;
try {
is = new BufferedInputStream(new FileInputStream(file));
p = (is.read() << 8) + is.read();
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
switch (p) {
case 0xfffe:
return "Unicode";
case 0xfeff:
return "UTF-16BE";
default:
return "GBK";
}
}
/**
* Return whether the charset of file is utf8.
*
* @param filePath The path of file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isUtf8(final String filePath) {
return isUtf8(getFileByPath(filePath));
}
/**
* Return whether the charset of file is utf8.
*
* @param file The file.
* @return {@code true}: yes<br>{@code false}: no
*/
public static boolean isUtf8(final File file) {
if (file == null) return false;
InputStream is = null;
try {
byte[] bytes = new byte[24];
is = new BufferedInputStream(new FileInputStream(file));
int read = is.read(bytes);
if (read != -1) {
byte[] readArr = new byte[read];
System.arraycopy(bytes, 0, readArr, 0, read);
return isUtf8(readArr) == 100;
} else {
return false;
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
return false;
}
/**
* UTF-8编码方式
* ----------------------------------------------
* 0xxxxxxx
* 110xxxxx 10xxxxxx
* 1110xxxx 10xxxxxx 10xxxxxx
* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
*/
private static int isUtf8(byte[] raw) {
int i, len;
int utf8 = 0, ascii = 0;
if (raw.length > 3) {
if ((raw[0] == (byte) 0xEF) && (raw[1] == (byte) 0xBB) && (raw[2] == (byte) 0xBF)) {
return 100;
}
}
len = raw.length;
int child = 0;
for (i = 0; i < len; ) {
// UTF-8 byte shouldn't be FF and FE
if ((raw[i] & (byte) 0xFF) == (byte) 0xFF || (raw[i] & (byte) 0xFE) == (byte) 0xFE) {
return 0;
}
if (child == 0) {
// ASCII format is 0x0*******
if ((raw[i] & (byte) 0x7F) == raw[i] && raw[i] != 0) {