==================================
Missing and Unimplemented Features
==================================

This document attempts to capture features of the zstd C API that are currently
not exposed to Python.

If there is a feature on this page that would be beneficial to you, please
open a GitHub issue requesting its implementation. If an existing GitHub
issue exists, please leave a comment on the issue to amplify the importance of
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Missing Constants
=================

* ``ZSTD_CLEVEL_DEFAULT``
* ``ZSTD_SRCSIZEHINT_MIN``
* ``ZSTD_SRCSIZEHINT_MAX``
* ``ZSTD_BLOCKSIZE_MAX_MIN``
* ``ZSTD_DECOMPRESSION_MARGIN``

Compression and Decompression Parameters
========================================

* ``ZSTD_p_forceAttachDict``
* ``ZSTD_dictForceLoad``
* ``ZSTD_c_targetCBlockSize``
* ``ZSTD_c_literalCompressionMode``
* ``ZSTD_c_srcSizeHint``
* ``ZSTD_d_stableOutBuffer``
* ``ZSTD_c_enableDedicatedDictSearch``
* ``ZSTD_c_stableInBuffer``
* ``ZSTD_c_stableOutBuffer``
* ``ZSTD_c_blockDelimiters``
* ``ZSTD_c_validateSequences``
* ``ZSTD_c_useBlockSplitter``
* ``ZSTD_c_useRowMatchFinder``
* ``ZSTD_d_forceIgnoreChecksum``
* ``ZSTD_d_refMultipleDDicts``
* ``ZSTD_refMultipleDDicts_e``
* ``ZSTD_c_prefetchCDictTables``
* ``ZSTD_c_enableSeqProducerFallback``
* ``ZSTD_c_maxBlockSize``
* ``ZSTD_c_searchForExternalRepcodes``
* ``ZSTD_d_disableHuffmanAssembly``
* ``ZSTD_d_stableOutBuffer``

Missing Functions
=================

* ``ZSTDMT_toFlushNow()``
* ``ZSTD_minCLevel()``
* ``ZSTD_cParam_getBounds()``
* ``ZSTD_dParam_getBounds()``
* ``ZSTD_generateSequences()``
* ``ZSTD_mergeBlockDelimiters()``
* ``ZSTD_compressSequences()``
* ``ZSTD_writeSkippableFrame()``
* ``ZSTD_decompressionMargin()``
* ``ZSTD_sequenceBound()``

Missing Features
================

* ``ZSTD_getFrameProgression()`` isn't exposed everywhere it could be.
* Compression parameters cannot be modified mid operation.
* ``ZSTD_Sequence`` and related ``ZSTD_getSequences()`` not exposed.
* ``ZSTD_threadPool`` not exposed.
* ``ZSTD_sequenceProducer_F`` and ``ZSTD_registerSequenceProducer()`` not
  exposed.
* ``ZSTD_CCtx_getParameter()``, ``ZSTD_CCtxParam_getParameter()``, and
  ``ZSTD_DCtx_getParameter()`` could be leveraged for parameter retrieval.
* ``ZSTD_CCtx_setCParams()`` could potentially be utilized.
* ``ZSTD_error_*`` constants / error codes not exposed.