diff -r 2e484bdea8c4 -r b86a448a2965 contrib/python-zstandard/c-ext/compressionparams.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/python-zstandard/c-ext/compressionparams.c	Thu Nov 10 22:15:58 2016 -0800
@@ -0,0 +1,226 @@
+/**
+* Copyright (c) 2016-present, Gregory Szorc
+* All rights reserved.
+*
+* This software may be modified and distributed under the terms
+* of the BSD license. See the LICENSE file for details.
+*/
+
+#include "python-zstandard.h"
+
+void ztopy_compression_parameters(CompressionParametersObject* params, ZSTD_compressionParameters* zparams) {
+	zparams->windowLog = params->windowLog;
+	zparams->chainLog = params->chainLog;
+	zparams->hashLog = params->hashLog;
+	zparams->searchLog = params->searchLog;
+	zparams->searchLength = params->searchLength;
+	zparams->targetLength = params->targetLength;
+	zparams->strategy = params->strategy;
+}
+
+CompressionParametersObject* get_compression_parameters(PyObject* self, PyObject* args) {
+	int compressionLevel;
+	unsigned PY_LONG_LONG sourceSize = 0;
+	Py_ssize_t dictSize = 0;
+	ZSTD_compressionParameters params;
+	CompressionParametersObject* result;
+
+	if (!PyArg_ParseTuple(args, "i|Kn", &compressionLevel, &sourceSize, &dictSize)) {
+		return NULL;
+	}
+
+	params = ZSTD_getCParams(compressionLevel, sourceSize, dictSize);
+
+	result = PyObject_New(CompressionParametersObject, &CompressionParametersType);
+	if (!result) {
+		return NULL;
+	}
+
+	result->windowLog = params.windowLog;
+	result->chainLog = params.chainLog;
+	result->hashLog = params.hashLog;
+	result->searchLog = params.searchLog;
+	result->searchLength = params.searchLength;
+	result->targetLength = params.targetLength;
+	result->strategy = params.strategy;
+
+	return result;
+}
+
+PyObject* estimate_compression_context_size(PyObject* self, PyObject* args) {
+	CompressionParametersObject* params;
+	ZSTD_compressionParameters zparams;
+	PyObject* result;
+
+	if (!PyArg_ParseTuple(args, "O!", &CompressionParametersType, &params)) {
+		return NULL;
+	}
+
+	ztopy_compression_parameters(params, &zparams);
+	result = PyLong_FromSize_t(ZSTD_estimateCCtxSize(zparams));
+	return result;
+}
+
+PyDoc_STRVAR(CompressionParameters__doc__,
+"CompressionParameters: low-level control over zstd compression");
+
+static PyObject* CompressionParameters_new(PyTypeObject* subtype, PyObject* args, PyObject* kwargs) {
+	CompressionParametersObject* self;
+	unsigned windowLog;
+	unsigned chainLog;
+	unsigned hashLog;
+	unsigned searchLog;
+	unsigned searchLength;
+	unsigned targetLength;
+	unsigned strategy;
+
+	if (!PyArg_ParseTuple(args, "IIIIIII", &windowLog, &chainLog, &hashLog, &searchLog,
+		&searchLength, &targetLength, &strategy)) {
+		return NULL;
+	}
+
+	if (windowLog < ZSTD_WINDOWLOG_MIN || windowLog > ZSTD_WINDOWLOG_MAX) {
+		PyErr_SetString(PyExc_ValueError, "invalid window log value");
+		return NULL;
+	}
+
+	if (chainLog < ZSTD_CHAINLOG_MIN || chainLog > ZSTD_CHAINLOG_MAX) {
+		PyErr_SetString(PyExc_ValueError, "invalid chain log value");
+		return NULL;
+	}
+
+	if (hashLog < ZSTD_HASHLOG_MIN || hashLog > ZSTD_HASHLOG_MAX) {
+		PyErr_SetString(PyExc_ValueError, "invalid hash log value");
+		return NULL;
+	}
+
+	if (searchLog < ZSTD_SEARCHLOG_MIN || searchLog > ZSTD_SEARCHLOG_MAX) {
+		PyErr_SetString(PyExc_ValueError, "invalid search log value");
+		return NULL;
+	}
+
+	if (searchLength < ZSTD_SEARCHLENGTH_MIN || searchLength > ZSTD_SEARCHLENGTH_MAX) {
+		PyErr_SetString(PyExc_ValueError, "invalid search length value");
+		return NULL;
+	}
+
+	if (targetLength < ZSTD_TARGETLENGTH_MIN || targetLength > ZSTD_TARGETLENGTH_MAX) {
+		PyErr_SetString(PyExc_ValueError, "invalid target length value");
+		return NULL;
+	}
+
+	if (strategy < ZSTD_fast || strategy > ZSTD_btopt) {
+		PyErr_SetString(PyExc_ValueError, "invalid strategy value");
+		return NULL;
+	}
+
+	self = (CompressionParametersObject*)subtype->tp_alloc(subtype, 1);
+	if (!self) {
+		return NULL;
+	}
+
+	self->windowLog = windowLog;
+	self->chainLog = chainLog;
+	self->hashLog = hashLog;
+	self->searchLog = searchLog;
+	self->searchLength = searchLength;
+	self->targetLength = targetLength;
+	self->strategy = strategy;
+
+	return (PyObject*)self;
+}
+
+static void CompressionParameters_dealloc(PyObject* self) {
+	PyObject_Del(self);
+}
+
+static Py_ssize_t CompressionParameters_length(PyObject* self) {
+	return 7;
+};
+
+static PyObject* CompressionParameters_item(PyObject* o, Py_ssize_t i) {
+	CompressionParametersObject* self = (CompressionParametersObject*)o;
+
+	switch (i) {
+	case 0:
+		return PyLong_FromLong(self->windowLog);
+	case 1:
+		return PyLong_FromLong(self->chainLog);
+	case 2:
+		return PyLong_FromLong(self->hashLog);
+	case 3:
+		return PyLong_FromLong(self->searchLog);
+	case 4:
+		return PyLong_FromLong(self->searchLength);
+	case 5:
+		return PyLong_FromLong(self->targetLength);
+	case 6:
+		return PyLong_FromLong(self->strategy);
+	default:
+		PyErr_SetString(PyExc_IndexError, "index out of range");
+		return NULL;
+	}
+}
+
+static PySequenceMethods CompressionParameters_sq = {
+	CompressionParameters_length, /* sq_length */
+	0,							  /* sq_concat */
+	0,                            /* sq_repeat */
+	CompressionParameters_item,   /* sq_item */
+	0,                            /* sq_ass_item */
+	0,                            /* sq_contains */
+	0,                            /* sq_inplace_concat */
+	0                             /* sq_inplace_repeat */
+};
+
+PyTypeObject CompressionParametersType = {
+	PyVarObject_HEAD_INIT(NULL, 0)
+	"CompressionParameters", /* tp_name */
+	sizeof(CompressionParametersObject), /* tp_basicsize */
+	0,                         /* tp_itemsize */
+	(destructor)CompressionParameters_dealloc, /* tp_dealloc */
+	0,                         /* tp_print */
+	0,                         /* tp_getattr */
+	0,                         /* tp_setattr */
+	0,                         /* tp_compare */
+	0,                         /* tp_repr */
+	0,                         /* tp_as_number */
+	&CompressionParameters_sq, /* tp_as_sequence */
+	0,                         /* tp_as_mapping */
+	0,                         /* tp_hash  */
+	0,                         /* tp_call */
+	0,                         /* tp_str */
+	0,                         /* tp_getattro */
+	0,                         /* tp_setattro */
+	0,                         /* tp_as_buffer */
+	Py_TPFLAGS_DEFAULT,        /* tp_flags */
+	CompressionParameters__doc__, /* tp_doc */
+	0,                         /* tp_traverse */
+	0,                         /* tp_clear */
+	0,                         /* tp_richcompare */
+	0,                         /* tp_weaklistoffset */
+	0,                         /* tp_iter */
+	0,                         /* tp_iternext */
+	0,                         /* tp_methods */
+	0,                         /* tp_members */
+	0,                         /* tp_getset */
+	0,                         /* tp_base */
+	0,                         /* tp_dict */
+	0,                         /* tp_descr_get */
+	0,                         /* tp_descr_set */
+	0,                         /* tp_dictoffset */
+	0,                         /* tp_init */
+	0,                         /* tp_alloc */
+	CompressionParameters_new, /* tp_new */
+};
+
+void compressionparams_module_init(PyObject* mod) {
+	Py_TYPE(&CompressionParametersType) = &PyType_Type;
+	if (PyType_Ready(&CompressionParametersType) < 0) {
+		return;
+	}
+
+	Py_IncRef((PyObject*)&CompressionParametersType);
+	PyModule_AddObject(mod, "CompressionParameters",
+		(PyObject*)&CompressionParametersType);
+}