findHCSequencesWithDict

private fn

Lz4Sequence[] findHCSequencesWithDict(
       const(ubyte)[]  src,
       uint  hashBits,
       const(ubyte)[]  dict
)

Find sequences using a lazy matching algorithm (HC mode) with dictionary support.

This implements the LZ4 High Compression (HC) strategy used for levels 7-9, extended to support dictionary-based compression. Unlike greedy matching, lazy matching defers the decision to emit a match: after finding a match at position P, it checks if position P+1 has a longer match. If so, the byte at P is emitted as a literal and the better match at P+1 is used instead.

When a dictionary is provided, it is treated as data that precedes the source. Matches can reference positions in the dictionary.

Parameters

`src`	Input data to compress.
`hashBits`	Number of hash bits for the table (determines table size).
`dict`	Optional dictionary data (may be null or empty).

Returns

An array of Lz4Sequence structs describing the compressed

representation. The final sequence will have matchLen == 0.