FM / flatbuffers

/srv/osrm/osrm-backend/third_party/flatbuffers/java/com/google/flatbuffers/

/srv/osrm/osrm-backend/third_party/flatbuffers/java/com/google/flatbuffers

Name	Size	Mode	Actions
ByteBufferUtil.java	1611	0644	edit dl rm
Constants.java	1967	0644	edit dl rm
FlatBufferBuilder.java	38133	0644	edit dl rm
Struct.java	1865	0644	edit dl rm
Table.java	10272	0644	edit dl rm
Utf8.java	7136	0644	edit dl rm
Utf8Old.java	3232	0644	edit dl rm
Utf8Safe.java	17907	0644	edit dl rm

Edit: /srv/osrm/osrm-backend/third_party/flatbuffers/java/com/google/flatbuffers/Utf8.java (7136B)

/*
 * Copyright 2014 Google Inc. All rights reserved.
 *
 * 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 com.google.flatbuffers;

import java.nio.ByteBuffer;

import static java.lang.Character.MIN_HIGH_SURROGATE;
import static java.lang.Character.MIN_LOW_SURROGATE;
import static java.lang.Character.MIN_SUPPLEMENTARY_CODE_POINT;

public abstract class Utf8 {

/**
   * Returns the number of bytes in the UTF-8-encoded form of {@code sequence}. For a string,
   * this method is equivalent to {@code string.getBytes(UTF_8).length}, but is more efficient in
   * both time and space.
   *
   * @throws IllegalArgumentException if {@code sequence} contains ill-formed UTF-16 (unpaired
   *     surrogates)
   */
  public abstract int encodedLength(CharSequence sequence);

/**
   * Encodes the given characters to the target {@link ByteBuffer} using UTF-8 encoding.
   *
   * <p>Selects an optimal algorithm based on the type of {@link ByteBuffer} (i.e. heap or direct)
   * and the capabilities of the platform.
   *
   * @param in the source string to be encoded
   * @param out the target buffer to receive the encoded string.
   */
  public abstract void encodeUtf8(CharSequence in, ByteBuffer out);

/**
   * Decodes the given UTF-8 portion of the {@link ByteBuffer} into a {@link String}.
   *
   * @throws IllegalArgumentException if the input is not valid UTF-8.
   */
  public abstract String decodeUtf8(ByteBuffer buffer, int offset, int length);

private static Utf8 DEFAULT;

/**
   * Get the default UTF-8 processor.
   * @return the default processor
   */
  public static Utf8 getDefault() {
    if (DEFAULT == null) {
      DEFAULT = new Utf8Safe();
    }
    return DEFAULT;
  }

/**
   * Set the default instance of the UTF-8 processor.
   * @param instance the new instance to use
   */
  public static void setDefault(Utf8 instance) {
    DEFAULT = instance;
  }

/**
   * Utility methods for decoding bytes into {@link String}. Callers are responsible for extracting
   * bytes (possibly using Unsafe methods), and checking remaining bytes. All other UTF-8 validity
   * checks and codepoint conversion happen in this class.
   */
  static class DecodeUtil {

/**
     * Returns whether this is a single-byte codepoint (i.e., ASCII) with the form '0XXXXXXX'.
     */
    static boolean isOneByte(byte b) {
      return b >= 0;
    }

/**
     * Returns whether this is a two-byte codepoint with the form '10XXXXXX'.
     */
    static boolean isTwoBytes(byte b) {
      return b < (byte) 0xE0;
    }

/**
     * Returns whether this is a three-byte codepoint with the form '110XXXXX'.
     */
    static boolean isThreeBytes(byte b) {
      return b < (byte) 0xF0;
    }

static void handleOneByte(byte byte1, char[] resultArr, int resultPos) {
      resultArr[resultPos] = (char) byte1;
    }

static void handleTwoBytes(
        byte byte1, byte byte2, char[] resultArr, int resultPos)
        throws IllegalArgumentException {
      // Simultaneously checks for illegal trailing-byte in leading position (<= '11000000') and
      // overlong 2-byte, '11000001'.
      if (byte1 < (byte) 0xC2) {
        throw new IllegalArgumentException("Invalid UTF-8: Illegal leading byte in 2 bytes utf");
      }
      if (isNotTrailingByte(byte2)) {
        throw new IllegalArgumentException("Invalid UTF-8: Illegal trailing byte in 2 bytes utf");
      }
      resultArr[resultPos] = (char) (((byte1 & 0x1F) << 6) | trailingByteValue(byte2));
    }

static void handleThreeBytes(
        byte byte1, byte byte2, byte byte3, char[] resultArr, int resultPos)
        throws IllegalArgumentException {
      if (isNotTrailingByte(byte2)
              // overlong? 5 most significant bits must not all be zero
              || (byte1 == (byte) 0xE0 && byte2 < (byte) 0xA0)
              // check for illegal surrogate codepoints
              || (byte1 == (byte) 0xED && byte2 >= (byte) 0xA0)
              || isNotTrailingByte(byte3)) {
        throw new IllegalArgumentException("Invalid UTF-8");
      }
      resultArr[resultPos] = (char)
                                 (((byte1 & 0x0F) << 12) | (trailingByteValue(byte2) << 6) | trailingByteValue(byte3));
    }

static void handleFourBytes(
        byte byte1, byte byte2, byte byte3, byte byte4, char[] resultArr, int resultPos)
        throws IllegalArgumentException{
      if (isNotTrailingByte(byte2)
              // Check that 1 <= plane <= 16.  Tricky optimized form of:
              //   valid 4-byte leading byte?
              // if (byte1 > (byte) 0xF4 ||
              //   overlong? 4 most significant bits must not all be zero
              //     byte1 == (byte) 0xF0 && byte2 < (byte) 0x90 ||
              //   codepoint larger than the highest code point (U+10FFFF)?
              //     byte1 == (byte) 0xF4 && byte2 > (byte) 0x8F)
              || (((byte1 << 28) + (byte2 - (byte) 0x90)) >> 30) != 0
              || isNotTrailingByte(byte3)
              || isNotTrailingByte(byte4)) {
        throw new IllegalArgumentException("Invalid UTF-8");
      }
      int codepoint = ((byte1 & 0x07) << 18)
                          | (trailingByteValue(byte2) << 12)
                          | (trailingByteValue(byte3) << 6)
                          | trailingByteValue(byte4);
      resultArr[resultPos] = DecodeUtil.highSurrogate(codepoint);
      resultArr[resultPos + 1] = DecodeUtil.lowSurrogate(codepoint);
    }

/**
     * Returns whether the byte is not a valid continuation of the form '10XXXXXX'.
     */
    private static boolean isNotTrailingByte(byte b) {
      return b > (byte) 0xBF;
    }

/**
     * Returns the actual value of the trailing byte (removes the prefix '10') for composition.
     */
    private static int trailingByteValue(byte b) {
      return b & 0x3F;
    }

private static char highSurrogate(int codePoint) {
      return (char) ((MIN_HIGH_SURROGATE - (MIN_SUPPLEMENTARY_CODE_POINT >>> 10))
                         + (codePoint >>> 10));
    }

private static char lowSurrogate(int codePoint) {
      return (char) (MIN_LOW_SURROGATE + (codePoint & 0x3ff));
    }
  }

// These UTF-8 handling methods are copied from Guava's Utf8Unsafe class with a modification to throw
  // a protocol buffer local exception. This exception is then caught in CodedOutputStream so it can
  // fallback to more lenient behavior.
  static class UnpairedSurrogateException extends IllegalArgumentException {
    UnpairedSurrogateException(int index, int length) {
      super("Unpaired surrogate at index " + index + " of " + length);
    }
  }
}

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