compressBlockFast

private fn

size_t compressBlockFast(const(ubyte) *  src,  size_t srcLen,
       ubyte *  outBuf,  size_t outCap,
       int  level,
       uint *  ht =  null,
       size_t htSize =  0,
       uint  htBits =  0)

@trusted @nogc nothrow

Compress a single block using the fast pointer-based path.

This function performs LZO1X-style compression entirely with raw pointers and malloc/free, avoiding all GC allocations. It is marked @trusted @nogc nothrow so it can be called from performance-sensitive contexts.

The caller is responsible for providing a sufficiently large output buffer. A safe upper bound is srcLen + srcLen / 16 + 64.

When ht is supplied the caller owns the hash table and it is

not freed by this function; it is only reset with memset.

When ht is null the function allocates and frees a hash table internally.

Parameters

`src`	Pointer to the uncompressed source data.
`srcLen`	Number of bytes at `src`.
`outBuf`	Pointer to the output buffer.
`outCap`	Capacity of `outBuf` in bytes.
`level`	Compression level (0-9).
`ht`	Optional externally-owned hash table. If `null`, one is allocated and freed internally.
`htSize`	Number of entries in the externally-owned hash table. Ignored when `ht` is `null`.
`htBits`	Number of hash bits for the external table. Ignored when `ht` is `null`.

Returns

The number of bytes written to outBuf.

compressBlockFast

Parameters

Returns

See Also