kc3-lang/brotli/java/dec/Transform.java

• Show log

  Commit

• Hash : 5025365d
  Author :
  Date : 2016-10-17T14:04:59
  

  Add Java port of Brotli decoder.
  

Download

• java/dec/Transform.java

• /* Copyright 2015 Google Inc. All Rights Reserved.
  
     Distributed under MIT license.
     See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
  */
  
  package org.brotli.dec;
  
  import static org.brotli.dec.WordTransformType.IDENTITY;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_1;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_2;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_3;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_4;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_5;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_6;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_7;
  import static org.brotli.dec.WordTransformType.OMIT_FIRST_9;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_1;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_2;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_3;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_4;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_5;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_6;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_7;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_8;
  import static org.brotli.dec.WordTransformType.OMIT_LAST_9;
  import static org.brotli.dec.WordTransformType.UPPERCASE_ALL;
  import static org.brotli.dec.WordTransformType.UPPERCASE_FIRST;
  
  /**
   * Transformations on dictionary words.
   */
  final class Transform {
  
    private final byte[] prefix;
    private final WordTransformType type;
    private final byte[] suffix;
  
    Transform(String prefix, WordTransformType type, String suffix) {
      this.prefix = readUniBytes(prefix);
      this.type = type;
      this.suffix = readUniBytes(suffix);
    }
  
    static byte[] readUniBytes(String uniBytes) {
      byte[] result = new byte[uniBytes.length()];
      for (int i = 0; i < result.length; ++i) {
        result[i] = (byte) uniBytes.charAt(i);
      }
      return result;
    }
  
    static final Transform[] TRANSFORMS = {
        new Transform("", IDENTITY, ""),
        new Transform("", IDENTITY, " "),
        new Transform(" ", IDENTITY, " "),
        new Transform("", OMIT_FIRST_1, ""),
        new Transform("", UPPERCASE_FIRST, " "),
        new Transform("", IDENTITY, " the "),
        new Transform(" ", IDENTITY, ""),
        new Transform("s ", IDENTITY, " "),
        new Transform("", IDENTITY, " of "),
        new Transform("", UPPERCASE_FIRST, ""),
        new Transform("", IDENTITY, " and "),
        new Transform("", OMIT_FIRST_2, ""),
        new Transform("", OMIT_LAST_1, ""),
        new Transform(", ", IDENTITY, " "),
        new Transform("", IDENTITY, ", "),
        new Transform(" ", UPPERCASE_FIRST, " "),
        new Transform("", IDENTITY, " in "),
        new Transform("", IDENTITY, " to "),
        new Transform("e ", IDENTITY, " "),
        new Transform("", IDENTITY, "\""),
        new Transform("", IDENTITY, "."),
        new Transform("", IDENTITY, "\">"),
        new Transform("", IDENTITY, "\n"),
        new Transform("", OMIT_LAST_3, ""),
        new Transform("", IDENTITY, "]"),
        new Transform("", IDENTITY, " for "),
        new Transform("", OMIT_FIRST_3, ""),
        new Transform("", OMIT_LAST_2, ""),
        new Transform("", IDENTITY, " a "),
        new Transform("", IDENTITY, " that "),
        new Transform(" ", UPPERCASE_FIRST, ""),
        new Transform("", IDENTITY, ". "),
        new Transform(".", IDENTITY, ""),
        new Transform(" ", IDENTITY, ", "),
        new Transform("", OMIT_FIRST_4, ""),
        new Transform("", IDENTITY, " with "),
        new Transform("", IDENTITY, "'"),
        new Transform("", IDENTITY, " from "),
        new Transform("", IDENTITY, " by "),
        new Transform("", OMIT_FIRST_5, ""),
        new Transform("", OMIT_FIRST_6, ""),
        new Transform(" the ", IDENTITY, ""),
        new Transform("", OMIT_LAST_4, ""),
        new Transform("", IDENTITY, ". The "),
        new Transform("", UPPERCASE_ALL, ""),
        new Transform("", IDENTITY, " on "),
        new Transform("", IDENTITY, " as "),
        new Transform("", IDENTITY, " is "),
        new Transform("", OMIT_LAST_7, ""),
        new Transform("", OMIT_LAST_1, "ing "),
        new Transform("", IDENTITY, "\n\t"),
        new Transform("", IDENTITY, ":"),
        new Transform(" ", IDENTITY, ". "),
        new Transform("", IDENTITY, "ed "),
        new Transform("", OMIT_FIRST_9, ""),
        new Transform("", OMIT_FIRST_7, ""),
        new Transform("", OMIT_LAST_6, ""),
        new Transform("", IDENTITY, "("),
        new Transform("", UPPERCASE_FIRST, ", "),
        new Transform("", OMIT_LAST_8, ""),
        new Transform("", IDENTITY, " at "),
        new Transform("", IDENTITY, "ly "),
        new Transform(" the ", IDENTITY, " of "),
        new Transform("", OMIT_LAST_5, ""),
        new Transform("", OMIT_LAST_9, ""),
        new Transform(" ", UPPERCASE_FIRST, ", "),
        new Transform("", UPPERCASE_FIRST, "\""),
        new Transform(".", IDENTITY, "("),
        new Transform("", UPPERCASE_ALL, " "),
        new Transform("", UPPERCASE_FIRST, "\">"),
        new Transform("", IDENTITY, "=\""),
        new Transform(" ", IDENTITY, "."),
        new Transform(".com/", IDENTITY, ""),
        new Transform(" the ", IDENTITY, " of the "),
        new Transform("", UPPERCASE_FIRST, "'"),
        new Transform("", IDENTITY, ". This "),
        new Transform("", IDENTITY, ","),
        new Transform(".", IDENTITY, " "),
        new Transform("", UPPERCASE_FIRST, "("),
        new Transform("", UPPERCASE_FIRST, "."),
        new Transform("", IDENTITY, " not "),
        new Transform(" ", IDENTITY, "=\""),
        new Transform("", IDENTITY, "er "),
        new Transform(" ", UPPERCASE_ALL, " "),
        new Transform("", IDENTITY, "al "),
        new Transform(" ", UPPERCASE_ALL, ""),
        new Transform("", IDENTITY, "='"),
        new Transform("", UPPERCASE_ALL, "\""),
        new Transform("", UPPERCASE_FIRST, ". "),
        new Transform(" ", IDENTITY, "("),
        new Transform("", IDENTITY, "ful "),
        new Transform(" ", UPPERCASE_FIRST, ". "),
        new Transform("", IDENTITY, "ive "),
        new Transform("", IDENTITY, "less "),
        new Transform("", UPPERCASE_ALL, "'"),
        new Transform("", IDENTITY, "est "),
        new Transform(" ", UPPERCASE_FIRST, "."),
        new Transform("", UPPERCASE_ALL, "\">"),
        new Transform(" ", IDENTITY, "='"),
        new Transform("", UPPERCASE_FIRST, ","),
        new Transform("", IDENTITY, "ize "),
        new Transform("", UPPERCASE_ALL, "."),
        new Transform("\u00c2\u00a0", IDENTITY, ""),
        new Transform(" ", IDENTITY, ","),
        new Transform("", UPPERCASE_FIRST, "=\""),
        new Transform("", UPPERCASE_ALL, "=\""),
        new Transform("", IDENTITY, "ous "),
        new Transform("", UPPERCASE_ALL, ", "),
        new Transform("", UPPERCASE_FIRST, "='"),
        new Transform(" ", UPPERCASE_FIRST, ","),
        new Transform(" ", UPPERCASE_ALL, "=\""),
        new Transform(" ", UPPERCASE_ALL, ", "),
        new Transform("", UPPERCASE_ALL, ","),
        new Transform("", UPPERCASE_ALL, "("),
        new Transform("", UPPERCASE_ALL, ". "),
        new Transform(" ", UPPERCASE_ALL, "."),
        new Transform("", UPPERCASE_ALL, "='"),
        new Transform(" ", UPPERCASE_ALL, ". "),
        new Transform(" ", UPPERCASE_FIRST, "=\""),
        new Transform(" ", UPPERCASE_ALL, "='"),
        new Transform(" ", UPPERCASE_FIRST, "='")
    };
  
    static int transformDictionaryWord(byte[] dst, int dstOffset, byte[] word, int wordOffset,
        int len, Transform transform) {
      int offset = dstOffset;
  
      // Copy prefix.
      byte[] string = transform.prefix;
      int tmp = string.length;
      int i = 0;
      // In most cases tmp < 10 -> no benefits from System.arrayCopy
      while (i < tmp) {
        dst[offset++] = string[i++];
      }
  
      // Copy trimmed word.
      WordTransformType op = transform.type;
      tmp = op.omitFirst;
      if (tmp > len) {
        tmp = len;
      }
      wordOffset += tmp;
      len -= tmp;
      len -= op.omitLast;
      i = len;
      while (i > 0) {
        dst[offset++] = word[wordOffset++];
        i--;
      }
  
      if (op == UPPERCASE_ALL || op == UPPERCASE_FIRST) {
        int uppercaseOffset = offset - len;
        if (op == UPPERCASE_FIRST) {
          len = 1;
        }
        while (len > 0) {
          tmp = dst[uppercaseOffset] & 0xFF;
          if (tmp < 0xc0) {
            if (tmp >= 'a' && tmp <= 'z') {
              dst[uppercaseOffset] ^= (byte) 32;
            }
            uppercaseOffset += 1;
            len -= 1;
          } else if (tmp < 0xe0) {
            dst[uppercaseOffset + 1] ^= (byte) 32;
            uppercaseOffset += 2;
            len -= 2;
          } else {
            dst[uppercaseOffset + 2] ^= (byte) 5;
            uppercaseOffset += 3;
            len -= 3;
          }
        }
      }
  
      // Copy suffix.
      string = transform.suffix;
      tmp = string.length;
      i = 0;
      while (i < tmp) {
        dst[offset++] = string[i++];
      }
  
      return offset - dstOffset;
    }
  }
  

Download