/**

* 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"

extern PyObject* ZstdError;

static char frame_header[] = {

	'\x28',

	'\xb5',

	'\x2f',

	'\xfd',

};

void constants_module_init(PyObject* mod) {

	PyObject* version;

	PyObject* zstdVersion;

	PyObject* frameHeader;

#if PY_MAJOR_VERSION >= 3

	version = PyUnicode_FromString(PYTHON_ZSTANDARD_VERSION);

#else

	version = PyString_FromString(PYTHON_ZSTANDARD_VERSION);

#endif

	Py_INCREF(version);

	PyModule_AddObject(mod, "__version__", version);

	ZstdError = PyErr_NewException("zstd.ZstdError", NULL, NULL);

	PyModule_AddObject(mod, "ZstdError", ZstdError);

	/* For now, the version is a simple tuple instead of a dedicated type. */

	zstdVersion = PyTuple_New(3);

	PyTuple_SetItem(zstdVersion, 0, PyLong_FromLong(ZSTD_VERSION_MAJOR));

	PyTuple_SetItem(zstdVersion, 1, PyLong_FromLong(ZSTD_VERSION_MINOR));

	PyTuple_SetItem(zstdVersion, 2, PyLong_FromLong(ZSTD_VERSION_RELEASE));

	Py_IncRef(zstdVersion);

	PyModule_AddObject(mod, "ZSTD_VERSION", zstdVersion);

	frameHeader = PyBytes_FromStringAndSize(frame_header, sizeof(frame_header));

	if (frameHeader) {

		PyModule_AddObject(mod, "FRAME_HEADER", frameHeader);

	}

	else {

		PyErr_Format(PyExc_ValueError, "could not create frame header object");

	}

	PyModule_AddIntConstant(mod, "MAX_COMPRESSION_LEVEL", ZSTD_maxCLevel());

	PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_INPUT_SIZE",

		(long)ZSTD_CStreamInSize());

	PyModule_AddIntConstant(mod, "COMPRESSION_RECOMMENDED_OUTPUT_SIZE",

		(long)ZSTD_CStreamOutSize());

	PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_INPUT_SIZE",

		(long)ZSTD_DStreamInSize());

	PyModule_AddIntConstant(mod, "DECOMPRESSION_RECOMMENDED_OUTPUT_SIZE",

		(long)ZSTD_DStreamOutSize());

	PyModule_AddIntConstant(mod, "MAGIC_NUMBER", ZSTD_MAGICNUMBER);

	PyModule_AddIntConstant(mod, "WINDOWLOG_MIN", ZSTD_WINDOWLOG_MIN);

	PyModule_AddIntConstant(mod, "WINDOWLOG_MAX", ZSTD_WINDOWLOG_MAX);

	PyModule_AddIntConstant(mod, "CHAINLOG_MIN", ZSTD_CHAINLOG_MIN);

	PyModule_AddIntConstant(mod, "CHAINLOG_MAX", ZSTD_CHAINLOG_MAX);

	PyModule_AddIntConstant(mod, "HASHLOG_MIN", ZSTD_HASHLOG_MIN);

	PyModule_AddIntConstant(mod, "HASHLOG_MAX", ZSTD_HASHLOG_MAX);

	PyModule_AddIntConstant(mod, "HASHLOG3_MAX", ZSTD_HASHLOG3_MAX);

	PyModule_AddIntConstant(mod, "SEARCHLOG_MIN", ZSTD_SEARCHLOG_MIN);

	PyModule_AddIntConstant(mod, "SEARCHLOG_MAX", ZSTD_SEARCHLOG_MAX);

	PyModule_AddIntConstant(mod, "SEARCHLENGTH_MIN", ZSTD_SEARCHLENGTH_MIN);

	PyModule_AddIntConstant(mod, "SEARCHLENGTH_MAX", ZSTD_SEARCHLENGTH_MAX);

	PyModule_AddIntConstant(mod, "TARGETLENGTH_MIN", ZSTD_TARGETLENGTH_MIN);

	PyModule_AddIntConstant(mod, "TARGETLENGTH_MAX", ZSTD_TARGETLENGTH_MAX);

	PyModule_AddIntConstant(mod, "STRATEGY_FAST", ZSTD_fast);

	PyModule_AddIntConstant(mod, "STRATEGY_DFAST", ZSTD_dfast);

	PyModule_AddIntConstant(mod, "STRATEGY_GREEDY", ZSTD_greedy);

	PyModule_AddIntConstant(mod, "STRATEGY_LAZY", ZSTD_lazy);

	PyModule_AddIntConstant(mod, "STRATEGY_LAZY2", ZSTD_lazy2);

	PyModule_AddIntConstant(mod, "STRATEGY_BTLAZY2", ZSTD_btlazy2);

	PyModule_AddIntConstant(mod, "STRATEGY_BTOPT", ZSTD_btopt);

}