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| /* Copyright 2015 Google Inc. All Rights Reserved.
|
| Distributed under MIT license.
| See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
| */
| namespace Org.Brotli.Dec
| {
| /// <summary>Transformations on dictionary words.</summary>
| internal sealed class Transform
| {
| private readonly byte[] prefix;
|
| private readonly int type;
|
| private readonly byte[] suffix;
|
| internal Transform(string prefix, int type, string suffix)
| {
| this.prefix = ReadUniBytes(prefix);
| this.type = type;
| this.suffix = ReadUniBytes(suffix);
| }
|
| internal static byte[] ReadUniBytes(string uniBytes)
| {
| byte[] result = new byte[uniBytes.Length];
| for (int i = 0; i < result.Length; ++i)
| {
| result[i] = unchecked((byte)uniBytes[i]);
| }
| return result;
| }
|
| internal static readonly Org.Brotli.Dec.Transform[] Transforms = new Org.Brotli.Dec.Transform[] { new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, string.Empty), new Org.Brotli.Dec.Transform(string.Empty,
| Org.Brotli.Dec.WordTransformType.Identity, " "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst1, string.Empty), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " the "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity
| , string.Empty), new Org.Brotli.Dec.Transform("s ", Org.Brotli.Dec.WordTransformType.Identity, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " of "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .UppercaseFirst, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " and "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst2, string.Empty), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast1, string.Empty), new Org.Brotli.Dec.Transform(", ", Org.Brotli.Dec.WordTransformType.Identity, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity
| , ", "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseFirst, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " in "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .Identity, " to "), new Org.Brotli.Dec.Transform("e ", Org.Brotli.Dec.WordTransformType.Identity, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "\""), new Org.Brotli.Dec.Transform(string.Empty,
| Org.Brotli.Dec.WordTransformType.Identity, "."), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "\">"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "\n"), new
| Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast3, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "]"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .Identity, " for "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst3, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast2, string.Empty), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " a "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " that "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseFirst
| , string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, ". "), new Org.Brotli.Dec.Transform(".", Org.Brotli.Dec.WordTransformType.Identity, string.Empty), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType
| .Identity, ", "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst4, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " with "), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "'"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " from "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity
| , " by "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst5, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst6, string.Empty), new Org.Brotli.Dec.Transform
| (" the ", Org.Brotli.Dec.WordTransformType.Identity, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast4, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .Identity, ". The "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " on "), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " as "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " is "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast7
| , string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast1, "ing "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "\n\t"), new Org.Brotli.Dec.Transform(string.Empty
| , Org.Brotli.Dec.WordTransformType.Identity, ":"), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, ". "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "ed "), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst9, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitFirst7, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .OmitLast6, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "("), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, ", "), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast8, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " at "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .Identity, "ly "), new Org.Brotli.Dec.Transform(" the ", Org.Brotli.Dec.WordTransformType.Identity, " of "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast5, string.Empty), new Org.Brotli.Dec.Transform(
| string.Empty, Org.Brotli.Dec.WordTransformType.OmitLast9, string.Empty), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseFirst, ", "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst
| , "\""), new Org.Brotli.Dec.Transform(".", Org.Brotli.Dec.WordTransformType.Identity, "("), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .UppercaseFirst, "\">"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "=\""), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, "."), new Org.Brotli.Dec.Transform(".com/",
| Org.Brotli.Dec.WordTransformType.Identity, string.Empty), new Org.Brotli.Dec.Transform(" the ", Org.Brotli.Dec.WordTransformType.Identity, " of the "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst
| , "'"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, ". This "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, ","), new Org.Brotli.Dec.Transform(".", Org.Brotli.Dec.WordTransformType
| .Identity, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, "("), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, "."), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.Identity, " not "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, "=\""), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "er "
| ), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseAll, " "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "al "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType
| .UppercaseAll, string.Empty), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "='"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, "\""), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, ". "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, "("), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity,
| "ful "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseFirst, ". "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "ive "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .Identity, "less "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, "'"), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "est "), new Org.Brotli.Dec.Transform
| (" ", Org.Brotli.Dec.WordTransformType.UppercaseFirst, "."), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, "\">"), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, "='"
| ), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, ","), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity, "ize "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType
| .UppercaseAll, "."), new Org.Brotli.Dec.Transform("\u00c2\u00a0", Org.Brotli.Dec.WordTransformType.Identity, string.Empty), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.Identity, ","), new Org.Brotli.Dec.Transform(string.Empty
| , Org.Brotli.Dec.WordTransformType.UppercaseFirst, "=\""), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, "=\""), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.Identity
| , "ous "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, ", "), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseFirst, "='"), new Org.Brotli.Dec.Transform(" ",
| Org.Brotli.Dec.WordTransformType.UppercaseFirst, ","), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseAll, "=\""), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseAll, ", "), new Org.Brotli.Dec.Transform
| (string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, ","), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, "("), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.
| UppercaseAll, ". "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseAll, "."), new Org.Brotli.Dec.Transform(string.Empty, Org.Brotli.Dec.WordTransformType.UppercaseAll, "='"), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType
| .UppercaseAll, ". "), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseFirst, "=\""), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType.UppercaseAll, "='"), new Org.Brotli.Dec.Transform(" ", Org.Brotli.Dec.WordTransformType
| .UppercaseFirst, "='") };
|
| internal static int TransformDictionaryWord(byte[] dst, int dstOffset, byte[] word, int wordOffset, int len, Org.Brotli.Dec.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.
| int op = transform.type;
| tmp = Org.Brotli.Dec.WordTransformType.GetOmitFirst(op);
| if (tmp > len)
| {
| tmp = len;
| }
| wordOffset += tmp;
| len -= tmp;
| len -= Org.Brotli.Dec.WordTransformType.GetOmitLast(op);
| i = len;
| while (i > 0)
| {
| dst[offset++] = word[wordOffset++];
| i--;
| }
| if (op == Org.Brotli.Dec.WordTransformType.UppercaseAll || op == Org.Brotli.Dec.WordTransformType.UppercaseFirst)
| {
| int uppercaseOffset = offset - len;
| if (op == Org.Brotli.Dec.WordTransformType.UppercaseFirst)
| {
| len = 1;
| }
| while (len > 0)
| {
| tmp = dst[uppercaseOffset] & unchecked((int)(0xFF));
| if (tmp < unchecked((int)(0xc0)))
| {
| if (tmp >= 'a' && tmp <= 'z')
| {
| dst[uppercaseOffset] ^= unchecked((byte)32);
| }
| uppercaseOffset += 1;
| len -= 1;
| }
| else if (tmp < unchecked((int)(0xe0)))
| {
| dst[uppercaseOffset + 1] ^= unchecked((byte)32);
| uppercaseOffset += 2;
| len -= 2;
| }
| else
| {
| dst[uppercaseOffset + 2] ^= unchecked((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;
| }
| }
| }
|
|
