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C# Match.Fix方法代码示例

本文整理汇总了C#中Match.Fix方法的典型用法代码示例。如果您正苦于以下问题:C# Match.Fix方法的具体用法?C# Match.Fix怎么用?C# Match.Fix使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Match的用法示例。


在下文中一共展示了Match.Fix方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: CompressHC

        /// <summary>
        /// Compress <code>bytes[off:off+len]</code> into <code>out</code>. Compared to
        /// <seealso cref="LZ4#compress(byte[], int, int, DataOutput, HashTable)"/>, this method
        /// is slower and uses more memory (~ 256KB per thread) but should provide
        /// better compression ratios (especially on large inputs) because it chooses
        /// the best match among up to 256 candidates and then performs trade-offs to
        /// fix overlapping matches. <code>ht</code> shouldn't be shared across threads
        /// but can safely be reused.
        /// </summary>
        public static void CompressHC(sbyte[] src, int srcOff, int srcLen, DataOutput @out, HCHashTable ht)
        {
            int srcEnd = srcOff + srcLen;
            int matchLimit = srcEnd - LAST_LITERALS;
            int mfLimit = matchLimit - MIN_MATCH;

            int sOff = srcOff;
            int anchor = sOff++;

            ht.Reset(srcOff);
            Match match0 = new Match();
            Match match1 = new Match();
            Match match2 = new Match();
            Match match3 = new Match();

            while (sOff <= mfLimit)
            {
                if (!ht.InsertAndFindBestMatch(src, sOff, matchLimit, match1))
                {
                    ++sOff;
                    continue;
                }

                // saved, in case we would skip too much
                CopyTo(match1, match0);

                while (true)
                {
                    Debug.Assert(match1.Start >= anchor);
                    if (match1.End() >= mfLimit || !ht.InsertAndFindWiderMatch(src, match1.End() - 2, match1.Start + 1, matchLimit, match1.Len, match2))
                    {
                        // no better match
                        EncodeSequence(src, anchor, [email protected], match1.Start, match1.Len, @out);
                        anchor = sOff = match1.End();
                        goto mainContinue;
                    }

                    if (match0.Start < match1.Start)
                    {
                        if (match2.Start < match1.Start + match0.Len) // empirical
                        {
                            CopyTo(match0, match1);
                        }
                    }
                    Debug.Assert(match2.Start > match1.Start);

                    if (match2.Start - match1.Start < 3) // First Match too small : removed
                    {
                        CopyTo(match2, match1);
                        goto search2Continue;
                    }

                    while (true)
                    {
                        if (match2.Start - match1.Start < OPTIMAL_ML)
                        {
                            int newMatchLen = match1.Len;
                            if (newMatchLen > OPTIMAL_ML)
                            {
                                newMatchLen = OPTIMAL_ML;
                            }
                            if (match1.Start + newMatchLen > match2.End() - MIN_MATCH)
                            {
                                newMatchLen = match2.Start - match1.Start + match2.Len - MIN_MATCH;
                            }
                            int correction = newMatchLen - (match2.Start - match1.Start);
                            if (correction > 0)
                            {
                                match2.Fix(correction);
                            }
                        }

                        if (match2.Start + match2.Len >= mfLimit || !ht.InsertAndFindWiderMatch(src, match2.End() - 3, match2.Start, matchLimit, match2.Len, match3))
                        {
                            // no better match -> 2 sequences to encode
                            if (match2.Start < match1.End())
                            {
                                match1.Len = match2.Start - match1.Start;
                            }
                            // encode seq 1
                            EncodeSequence(src, anchor, [email protected], match1.Start, match1.Len, @out);
                            anchor = sOff = match1.End();
                            // encode seq 2
                            EncodeSequence(src, anchor, [email protected], match2.Start, match2.Len, @out);
                            anchor = sOff = match2.End();
                            goto mainContinue;
                        }

                        if (match3.Start < match1.End() + 3) // Not enough space for match 2 : remove it
                        {
                            if (match3.Start >= match1.End()) // // can write Seq1 immediately ==> Seq2 is removed, so Seq3 becomes Seq1
//.........这里部分代码省略.........
开发者ID:joyanta,项目名称:lucene.net,代码行数:101,代码来源:LZ4.cs


注:本文中的Match.Fix方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。