countMatchWithDict

private fn

size_t countMatchWithDict(
       const(ubyte)[]  dict,
       const(ubyte)[]  src,
       size_t matchPos,
       size_t srcPos,
       size_t maxLen
)

Count matching bytes when the match candidate may be in the dictionary.

This function handles the case where the match position (matchPos) may reference the dictionary (positions 0..dictLen-1) or the source data (positions dictLen..dictLen+srcLen-1). The current position (srcPos) is always in the source data.

Parameters

`dict`	Dictionary data (may be empty).
`src`	Source data being compressed.
`matchPos`	Position of the match candidate in the combined dict+src space.
`srcPos`	Current position in src (0-based within src, not combined).
`maxLen`	Maximum number of bytes to compare.

Returns

The number of consecutive matching bytes (0 to maxLen).