import os
import ctypes
from ctypes.util import find_library


class RTreeError(Exception):
    "RTree exception, indicates a RTree-related error."
    pass


def check_return(result, func, cargs):
    "Error checking for Error calls"
    if result != 0:
        s = rt.Error_GetLastErrorMsg().decode()
        msg = 'LASError in "%s": %s' % \
            (func.__name__, s)
        rt.Error_Reset()
        raise RTreeError(msg)
    return True


def check_void(result, func, cargs):
    "Error checking for void* returns"
    if not bool(result):
        s = rt.Error_GetLastErrorMsg().decode()
        msg = 'Error in "%s": %s' % (func.__name__, s)
        rt.Error_Reset()
        raise RTreeError(msg)
    return result


def check_void_done(result, func, cargs):
    "Error checking for void* returns that might be empty with no error"
    if rt.Error_GetErrorCount():
        s = rt.Error_GetLastErrorMsg().decode()
        msg = 'Error in "%s": %s' % (func.__name__, s)
        rt.Error_Reset()
        raise RTreeError(msg)
    return result


def check_value(result, func, cargs):
    "Error checking proper value returns"
    count = rt.Error_GetErrorCount()
    if count != 0:
        s = rt.Error_GetLastErrorMsg().decode()
        msg = 'Error in "%s": %s' % (func.__name__, s)
        rt.Error_Reset()
        raise RTreeError(msg)
    return result


def check_value_free(result, func, cargs):
    "Error checking proper value returns"
    count = rt.Error_GetErrorCount()
    if count != 0:
        s = rt.Error_GetLastErrorMsg().decode()
        msg = 'Error in "%s": %s' % (func.__name__, s)
        rt.Error_Reset()
        raise RTreeError(msg)
    return result


def free_returned_char_p(result, func, cargs):
    retvalue = ctypes.string_at(result)
    p = ctypes.cast(result, ctypes.POINTER(ctypes.c_void_p))
    rt.Index_Free(p)
    return retvalue


def free_error_msg_ptr(result, func, cargs):
    retvalue = ctypes.string_at(result)
    p = ctypes.cast(result, ctypes.POINTER(ctypes.c_void_p))
    rt.Index_Free(p)
    return retvalue


if os.name == 'nt':

    def _load_library(dllname, loadfunction, dllpaths=('', )):
        """Load a DLL via ctypes load function. Return None on failure.

        Try loading the DLL from the current package directory first,
        then from the Windows DLL search path.

        """
        try:
            dllpaths = (os.path.abspath(os.path.dirname(__file__)),
                        ) + dllpaths
        except NameError:
            pass  # no __file__ attribute on PyPy and some frozen distributions
        for path in dllpaths:
            if path:
                # temporarily add the path to the PATH environment variable
                # so Windows can find additional DLL dependencies.
                try:
                    oldenv = os.environ['PATH']
                    os.environ['PATH'] = path + ';' + oldenv
                except KeyError:
                    oldenv = None
            try:
                return loadfunction(os.path.join(path, dllname))
            except (WindowsError, OSError):
                pass
            finally:
                if path and oldenv is not None:
                    os.environ['PATH'] = oldenv
        return None

    if 'SPATIALINDEX_C_LIBRARY' in os.environ:
        lib_path, lib_name = os.path.split(os.environ['SPATIALINDEX_C_LIBRARY'])
        rt = _load_library(lib_name, ctypes.cdll.LoadLibrary, (lib_path,))
    else:
        rt = _load_library('spatialindex_c.dll', ctypes.cdll.LoadLibrary)
    if not rt:
        raise OSError("could not find or load spatialindex_c.dll")

elif os.name == 'posix':
    if 'SPATIALINDEX_C_LIBRARY' in os.environ:
        lib_name = os.environ['SPATIALINDEX_C_LIBRARY']
    else:
        lib_name = find_library('spatialindex_c')

    if lib_name is None:
        raise OSError("Could not find libspatialindex_c library file")

    rt = ctypes.CDLL(lib_name)
else:
    raise RTreeError('Unsupported OS "%s"' % os.name)

rt.Error_GetLastErrorNum.restype = ctypes.c_int

rt.Error_GetLastErrorMsg.argtypes = []
rt.Error_GetLastErrorMsg.restype = ctypes.POINTER(ctypes.c_char)
rt.Error_GetLastErrorMsg.errcheck = free_error_msg_ptr

rt.Error_GetLastErrorMethod.restype = ctypes.POINTER(ctypes.c_char)
rt.Error_GetLastErrorMethod.errcheck = free_returned_char_p

rt.Error_GetErrorCount.argtypes = []
rt.Error_GetErrorCount.restype = ctypes.c_int

rt.Error_Reset.argtypes = []
rt.Error_Reset.restype = None

rt.Index_Create.argtypes = [ctypes.c_void_p]
rt.Index_Create.restype = ctypes.c_void_p
rt.Index_Create.errcheck = check_void

NEXTFUNC = ctypes.CFUNCTYPE(ctypes.c_int,
                            ctypes.POINTER(ctypes.c_int64),
                            ctypes.POINTER(ctypes.POINTER(ctypes.c_double)),
                            ctypes.POINTER(ctypes.POINTER(ctypes.c_double)),
                            ctypes.POINTER(ctypes.c_uint32),
                            ctypes.POINTER(ctypes.POINTER(ctypes.c_ubyte)),
                            ctypes.POINTER(ctypes.c_uint32))

rt.Index_CreateWithStream.argtypes = [ctypes.c_void_p, NEXTFUNC]
rt.Index_CreateWithStream.restype = ctypes.c_void_p
rt.Index_CreateWithStream.errcheck = check_void

rt.Index_Destroy.argtypes = [ctypes.c_void_p]
rt.Index_Destroy.restype = None
rt.Index_Destroy.errcheck = check_void_done

rt.Index_GetProperties.argtypes = [ctypes.c_void_p]
rt.Index_GetProperties.restype = ctypes.c_void_p
rt.Index_GetProperties.errcheck = check_void

rt.Index_DeleteData.argtypes = [ctypes.c_void_p,
                                ctypes.c_int64,
                                ctypes.POINTER(ctypes.c_double),
                                ctypes.POINTER(ctypes.c_double),
                                ctypes.c_uint32]
rt.Index_DeleteData.restype = ctypes.c_int
rt.Index_DeleteData.errcheck = check_return

rt.Index_InsertData.argtypes = [ctypes.c_void_p,
                                ctypes.c_int64,
                                ctypes.POINTER(ctypes.c_double),
                                ctypes.POINTER(ctypes.c_double),
                                ctypes.c_uint32,
                                ctypes.POINTER(ctypes.c_ubyte),
                                ctypes.c_uint32]
rt.Index_InsertData.restype = ctypes.c_int
rt.Index_InsertData.errcheck = check_return

rt.Index_GetBounds.argtypes = [ctypes.c_void_p,
                               ctypes.POINTER(ctypes.POINTER(ctypes.c_double)),
                               ctypes.POINTER(ctypes.POINTER(ctypes.c_double)),
                               ctypes.POINTER(ctypes.c_uint32)]
rt.Index_GetBounds.restype = ctypes.c_int
rt.Index_GetBounds.errcheck = check_value

rt.Index_IsValid.argtypes = [ctypes.c_void_p]
rt.Index_IsValid.restype = ctypes.c_int
rt.Index_IsValid.errcheck = check_value

rt.Index_Intersects_obj.argtypes = [ctypes.c_void_p,
                                    ctypes.POINTER(ctypes.c_double),
                                    ctypes.POINTER(ctypes.c_double),
                                    ctypes.c_uint32,
                                    ctypes.POINTER(
                                        ctypes.POINTER(ctypes.c_void_p)),
                                    ctypes.POINTER(ctypes.c_uint64)]
rt.Index_Intersects_obj.restype = ctypes.c_int
rt.Index_Intersects_obj.errcheck = check_return

rt.Index_Intersects_id.argtypes = [ctypes.c_void_p,
                                   ctypes.POINTER(ctypes.c_double),
                                   ctypes.POINTER(ctypes.c_double),
                                   ctypes.c_uint32,
                                   ctypes.POINTER(
                                       ctypes.POINTER(ctypes.c_int64)),
                                   ctypes.POINTER(ctypes.c_uint64)]
rt.Index_Intersects_id.restype = ctypes.c_int
rt.Index_Intersects_id.errcheck = check_return

rt.Index_Intersects_count.argtypes = [ctypes.c_void_p,
                                      ctypes.POINTER(ctypes.c_double),
                                      ctypes.POINTER(ctypes.c_double),
                                      ctypes.c_uint32,
                                      ctypes.POINTER(ctypes.c_uint64)]

rt.Index_NearestNeighbors_obj.argtypes = [ctypes.c_void_p,
                                          ctypes.POINTER(ctypes.c_double),
                                          ctypes.POINTER(ctypes.c_double),
                                          ctypes.c_uint32,
                                          ctypes.POINTER(
                                              ctypes.POINTER(ctypes.c_void_p)),
                                          ctypes.POINTER(ctypes.c_uint64)]
rt.Index_NearestNeighbors_obj.restype = ctypes.c_int
rt.Index_NearestNeighbors_obj.errcheck = check_return

rt.Index_NearestNeighbors_id.argtypes = [ctypes.c_void_p,
                                         ctypes.POINTER(ctypes.c_double),
                                         ctypes.POINTER(ctypes.c_double),
                                         ctypes.c_uint32,
                                         ctypes.POINTER(
                                             ctypes.POINTER(ctypes.c_int64)),
                                         ctypes.POINTER(ctypes.c_uint64)]
rt.Index_NearestNeighbors_id.restype = ctypes.c_int
rt.Index_NearestNeighbors_id.errcheck = check_return

rt.Index_GetLeaves.argtypes = [ctypes.c_void_p,
                               ctypes.POINTER(ctypes.c_uint32),
                               ctypes.POINTER(ctypes.POINTER(ctypes.c_uint32)),
                               ctypes.POINTER(ctypes.POINTER(ctypes.c_int64)),
                               ctypes.POINTER(ctypes.POINTER(
                                   ctypes.POINTER(ctypes.c_int64))),
                               ctypes.POINTER(ctypes.POINTER(
                                   ctypes.POINTER(ctypes.c_double))),
                               ctypes.POINTER(ctypes.POINTER(
                                   ctypes.POINTER(ctypes.c_double))),
                               ctypes.POINTER(ctypes.c_uint32)]
rt.Index_GetLeaves.restype = ctypes.c_int
rt.Index_GetLeaves.errcheck = check_return

rt.Index_DestroyObjResults.argtypes = \
    [ctypes.POINTER(ctypes.POINTER(ctypes.c_void_p)), ctypes.c_uint32]
rt.Index_DestroyObjResults.restype = None
rt.Index_DestroyObjResults.errcheck = check_void_done

rt.Index_ClearBuffer.argtypes = [ctypes.c_void_p]
rt.Index_ClearBuffer.restype = None
rt.Index_ClearBuffer.errcheck = check_void_done

rt.Index_Free.argtypes = [ctypes.POINTER(ctypes.c_void_p)]
rt.Index_Free.restype = None

rt.IndexItem_Destroy.argtypes = [ctypes.c_void_p]
rt.IndexItem_Destroy.restype = None
rt.IndexItem_Destroy.errcheck = check_void_done

rt.IndexItem_GetData.argtypes = [ctypes.c_void_p,
                                 ctypes.POINTER(
                                     ctypes.POINTER(ctypes.c_ubyte)),
                                 ctypes.POINTER(ctypes.c_uint64)]
rt.IndexItem_GetData.restype = ctypes.c_int
rt.IndexItem_GetData.errcheck = check_value

rt.IndexItem_GetBounds.argtypes = [ctypes.c_void_p,
                                   ctypes.POINTER(
                                       ctypes.POINTER(ctypes.c_double)),
                                   ctypes.POINTER(
                                       ctypes.POINTER(ctypes.c_double)),
                                   ctypes.POINTER(ctypes.c_uint32)]
rt.IndexItem_GetBounds.restype = ctypes.c_int
rt.IndexItem_GetBounds.errcheck = check_value

rt.IndexItem_GetID.argtypes = [ctypes.c_void_p]
rt.IndexItem_GetID.restype = ctypes.c_int64
rt.IndexItem_GetID.errcheck = check_value

rt.IndexProperty_Create.argtypes = []
rt.IndexProperty_Create.restype = ctypes.c_void_p
rt.IndexProperty_Create.errcheck = check_void

rt.IndexProperty_Destroy.argtypes = [ctypes.c_void_p]
rt.IndexProperty_Destroy.restype = None
rt.IndexProperty_Destroy.errcheck = check_void_done

rt.IndexProperty_SetIndexType.argtypes = [ctypes.c_void_p, ctypes.c_int32]
rt.IndexProperty_SetIndexType.restype = ctypes.c_int
rt.IndexProperty_SetIndexType.errcheck = check_return

rt.IndexProperty_GetIndexType.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetIndexType.restype = ctypes.c_int
rt.IndexProperty_GetIndexType.errcheck = check_value

rt.IndexProperty_SetDimension.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetDimension.restype = ctypes.c_int
rt.IndexProperty_SetDimension.errcheck = check_return

rt.IndexProperty_GetDimension.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetDimension.restype = ctypes.c_int
rt.IndexProperty_GetDimension.errcheck = check_value

rt.IndexProperty_SetIndexVariant.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetIndexVariant.restype = ctypes.c_int
rt.IndexProperty_SetIndexVariant.errcheck = check_return

rt.IndexProperty_GetIndexVariant.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetIndexVariant.restype = ctypes.c_int
rt.IndexProperty_GetIndexVariant.errcheck = check_value

rt.IndexProperty_SetIndexStorage.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetIndexStorage.restype = ctypes.c_int
rt.IndexProperty_SetIndexStorage.errcheck = check_return

rt.IndexProperty_GetIndexStorage.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetIndexStorage.restype = ctypes.c_int
rt.IndexProperty_GetIndexStorage.errcheck = check_value

rt.IndexProperty_SetIndexCapacity.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetIndexCapacity.restype = ctypes.c_int
rt.IndexProperty_SetIndexCapacity.errcheck = check_return

rt.IndexProperty_GetIndexCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetIndexCapacity.restype = ctypes.c_int
rt.IndexProperty_GetIndexCapacity.errcheck = check_value

rt.IndexProperty_SetLeafCapacity.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetLeafCapacity.restype = ctypes.c_int
rt.IndexProperty_SetLeafCapacity.errcheck = check_return

rt.IndexProperty_GetLeafCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetLeafCapacity.restype = ctypes.c_int
rt.IndexProperty_GetLeafCapacity.errcheck = check_value

rt.IndexProperty_SetPagesize.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetPagesize.restype = ctypes.c_int
rt.IndexProperty_SetPagesize.errcheck = check_return

rt.IndexProperty_GetPagesize.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetPagesize.restype = ctypes.c_int
rt.IndexProperty_GetPagesize.errcheck = check_value

rt.IndexProperty_SetLeafPoolCapacity.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetLeafPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_SetLeafPoolCapacity.errcheck = check_return

rt.IndexProperty_GetLeafPoolCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetLeafPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_GetLeafPoolCapacity.errcheck = check_value

rt.IndexProperty_SetIndexPoolCapacity.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetIndexPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_SetIndexPoolCapacity.errcheck = check_return

rt.IndexProperty_GetIndexPoolCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetIndexPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_GetIndexPoolCapacity.errcheck = check_value

rt.IndexProperty_SetRegionPoolCapacity.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetRegionPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_SetRegionPoolCapacity.errcheck = check_return

rt.IndexProperty_GetRegionPoolCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetRegionPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_GetRegionPoolCapacity.errcheck = check_value

rt.IndexProperty_SetPointPoolCapacity.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetPointPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_SetPointPoolCapacity.errcheck = check_return

rt.IndexProperty_GetPointPoolCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetPointPoolCapacity.restype = ctypes.c_int
rt.IndexProperty_GetPointPoolCapacity.errcheck = check_value

rt.IndexProperty_SetBufferingCapacity.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetBufferingCapacity.restype = ctypes.c_int
rt.IndexProperty_SetBufferingCapacity.errcheck = check_return

rt.IndexProperty_GetBufferingCapacity.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetBufferingCapacity.restype = ctypes.c_int
rt.IndexProperty_GetBufferingCapacity.errcheck = check_value

rt.IndexProperty_SetEnsureTightMBRs.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetEnsureTightMBRs.restype = ctypes.c_int
rt.IndexProperty_SetEnsureTightMBRs.errcheck = check_return

rt.IndexProperty_GetEnsureTightMBRs.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetEnsureTightMBRs.restype = ctypes.c_int
rt.IndexProperty_GetEnsureTightMBRs.errcheck = check_value

rt.IndexProperty_SetOverwrite.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetOverwrite.restype = ctypes.c_int
rt.IndexProperty_SetOverwrite.errcheck = check_return

rt.IndexProperty_GetOverwrite.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetOverwrite.restype = ctypes.c_int
rt.IndexProperty_GetOverwrite.errcheck = check_value

rt.IndexProperty_SetNearMinimumOverlapFactor.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetNearMinimumOverlapFactor.restype = ctypes.c_int
rt.IndexProperty_SetNearMinimumOverlapFactor.errcheck = check_return

rt.IndexProperty_GetNearMinimumOverlapFactor.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetNearMinimumOverlapFactor.restype = ctypes.c_int
rt.IndexProperty_GetNearMinimumOverlapFactor.errcheck = check_value

rt.IndexProperty_SetWriteThrough.argtypes = [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetWriteThrough.restype = ctypes.c_int
rt.IndexProperty_SetWriteThrough.errcheck = check_return

rt.IndexProperty_GetWriteThrough.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetWriteThrough.restype = ctypes.c_int
rt.IndexProperty_GetWriteThrough.errcheck = check_value

rt.IndexProperty_SetFillFactor.argtypes = [ctypes.c_void_p, ctypes.c_double]
rt.IndexProperty_SetFillFactor.restype = ctypes.c_int
rt.IndexProperty_SetFillFactor.errcheck = check_return

rt.IndexProperty_GetFillFactor.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetFillFactor.restype = ctypes.c_double
rt.IndexProperty_GetFillFactor.errcheck = check_value

rt.IndexProperty_SetSplitDistributionFactor.argtypes = \
    [ctypes.c_void_p, ctypes.c_double]
rt.IndexProperty_SetSplitDistributionFactor.restype = ctypes.c_int
rt.IndexProperty_SetSplitDistributionFactor.errcheck = check_return

rt.IndexProperty_GetSplitDistributionFactor.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetSplitDistributionFactor.restype = ctypes.c_double
rt.IndexProperty_GetSplitDistributionFactor.errcheck = check_value

rt.IndexProperty_SetTPRHorizon.argtypes = [ctypes.c_void_p, ctypes.c_double]
rt.IndexProperty_SetTPRHorizon.restype = ctypes.c_int
rt.IndexProperty_SetTPRHorizon.errcheck = check_return

rt.IndexProperty_GetTPRHorizon.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetTPRHorizon.restype = ctypes.c_double
rt.IndexProperty_GetTPRHorizon.errcheck = check_value

rt.IndexProperty_SetReinsertFactor.argtypes = \
    [ctypes.c_void_p, ctypes.c_double]
rt.IndexProperty_SetReinsertFactor.restype = ctypes.c_int
rt.IndexProperty_SetReinsertFactor.errcheck = check_return

rt.IndexProperty_GetReinsertFactor.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetReinsertFactor.restype = ctypes.c_double
rt.IndexProperty_GetReinsertFactor.errcheck = check_value

rt.IndexProperty_SetFileName.argtypes = [ctypes.c_void_p, ctypes.c_char_p]
rt.IndexProperty_SetFileName.restype = ctypes.c_int
rt.IndexProperty_SetFileName.errcheck = check_return

rt.IndexProperty_GetFileName.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetFileName.errcheck = free_returned_char_p
rt.IndexProperty_GetFileName.restype = ctypes.POINTER(ctypes.c_char)

rt.IndexProperty_SetFileNameExtensionDat.argtypes = \
    [ctypes.c_void_p, ctypes.c_char_p]
rt.IndexProperty_SetFileNameExtensionDat.restype = ctypes.c_int
rt.IndexProperty_SetFileNameExtensionDat.errcheck = check_return

rt.IndexProperty_GetFileNameExtensionDat.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetFileNameExtensionDat.errcheck = free_returned_char_p
rt.IndexProperty_GetFileNameExtensionDat.restype = \
    ctypes.POINTER(ctypes.c_char)

rt.IndexProperty_SetFileNameExtensionIdx.argtypes = \
    [ctypes.c_void_p, ctypes.c_char_p]
rt.IndexProperty_SetFileNameExtensionIdx.restype = ctypes.c_int
rt.IndexProperty_SetFileNameExtensionIdx.errcheck = check_return

rt.IndexProperty_GetFileNameExtensionIdx.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetFileNameExtensionIdx.errcheck = free_returned_char_p
rt.IndexProperty_GetFileNameExtensionIdx.restype = \
    ctypes.POINTER(ctypes.c_char)

rt.IndexProperty_SetCustomStorageCallbacksSize.argtypes = \
    [ctypes.c_void_p, ctypes.c_uint32]
rt.IndexProperty_SetCustomStorageCallbacksSize.restype = ctypes.c_int
rt.IndexProperty_SetCustomStorageCallbacksSize.errcheck = check_return

rt.IndexProperty_GetCustomStorageCallbacksSize.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetCustomStorageCallbacksSize.restype = ctypes.c_uint32
rt.IndexProperty_GetCustomStorageCallbacksSize.errcheck = check_value

rt.IndexProperty_SetCustomStorageCallbacks.argtypes = \
    [ctypes.c_void_p, ctypes.c_void_p]
rt.IndexProperty_SetCustomStorageCallbacks.restype = ctypes.c_int
rt.IndexProperty_SetCustomStorageCallbacks.errcheck = check_return

rt.IndexProperty_GetCustomStorageCallbacks.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetCustomStorageCallbacks.restype = ctypes.c_void_p
rt.IndexProperty_GetCustomStorageCallbacks.errcheck = check_value

rt.IndexProperty_SetIndexID.argtypes = [ctypes.c_void_p, ctypes.c_int64]
rt.IndexProperty_SetIndexID.restype = ctypes.c_int
rt.IndexProperty_SetIndexID.errcheck = check_return

rt.IndexProperty_GetIndexID.argtypes = [ctypes.c_void_p]
rt.IndexProperty_GetIndexID.restype = ctypes.c_int64
rt.IndexProperty_GetIndexID.errcheck = check_value

rt.SIDX_NewBuffer.argtypes = [ctypes.c_uint]
rt.SIDX_NewBuffer.restype = ctypes.c_void_p
rt.SIDX_NewBuffer.errcheck = check_void

rt.SIDX_DeleteBuffer.argtypes = [ctypes.c_void_p]
rt.SIDX_DeleteBuffer.restype = None

rt.SIDX_Version.argtypes = []
rt.SIDX_Version.restype = ctypes.POINTER(ctypes.c_char)
rt.SIDX_Version.errcheck = free_returned_char_p