/* Generated by Cython 0.29.13 */

/* BEGIN: Cython Metadata
{
    "distutils": {
        "depends": [],
        "name": "skimage.graph.heap",
        "sources": [
            "/home/emma/code/scikit-image/skimage/graph/heap.pyx"
        ]
    },
    "module_name": "skimage.graph.heap"
}
END: Cython Metadata */

#define PY_SSIZE_T_CLEAN
#include "Python.h"
#ifndef Py_PYTHON_H
    #error Python headers needed to compile C extensions, please install development version of Python.
#elif PY_VERSION_HEX < 0x02060000 || (0x03000000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x03030000)
    #error Cython requires Python 2.6+ or Python 3.3+.
#else
#define CYTHON_ABI "0_29_13"
#define CYTHON_HEX_VERSION 0x001D0DF0
#define CYTHON_FUTURE_DIVISION 1
#include <stddef.h>
#ifndef offsetof
  #define offsetof(type, member) ( (size_t) & ((type*)0) -> member )
#endif
#if !defined(WIN32) && !defined(MS_WINDOWS)
  #ifndef __stdcall
    #define __stdcall
  #endif
  #ifndef __cdecl
    #define __cdecl
  #endif
  #ifndef __fastcall
    #define __fastcall
  #endif
#endif
#ifndef DL_IMPORT
  #define DL_IMPORT(t) t
#endif
#ifndef DL_EXPORT
  #define DL_EXPORT(t) t
#endif
#define __PYX_COMMA ,
#ifndef HAVE_LONG_LONG
  #if PY_VERSION_HEX >= 0x02070000
    #define HAVE_LONG_LONG
  #endif
#endif
#ifndef PY_LONG_LONG
  #define PY_LONG_LONG LONG_LONG
#endif
#ifndef Py_HUGE_VAL
  #define Py_HUGE_VAL HUGE_VAL
#endif
#ifdef PYPY_VERSION
  #define CYTHON_COMPILING_IN_PYPY 1
  #define CYTHON_COMPILING_IN_PYSTON 0
  #define CYTHON_COMPILING_IN_CPYTHON 0
  #undef CYTHON_USE_TYPE_SLOTS
  #define CYTHON_USE_TYPE_SLOTS 0
  #undef CYTHON_USE_PYTYPE_LOOKUP
  #define CYTHON_USE_PYTYPE_LOOKUP 0
  #if PY_VERSION_HEX < 0x03050000
    #undef CYTHON_USE_ASYNC_SLOTS
    #define CYTHON_USE_ASYNC_SLOTS 0
  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
    #define CYTHON_USE_ASYNC_SLOTS 1
  #endif
  #undef CYTHON_USE_PYLIST_INTERNALS
  #define CYTHON_USE_PYLIST_INTERNALS 0
  #undef CYTHON_USE_UNICODE_INTERNALS
  #define CYTHON_USE_UNICODE_INTERNALS 0
  #undef CYTHON_USE_UNICODE_WRITER
  #define CYTHON_USE_UNICODE_WRITER 0
  #undef CYTHON_USE_PYLONG_INTERNALS
  #define CYTHON_USE_PYLONG_INTERNALS 0
  #undef CYTHON_AVOID_BORROWED_REFS
  #define CYTHON_AVOID_BORROWED_REFS 1
  #undef CYTHON_ASSUME_SAFE_MACROS
  #define CYTHON_ASSUME_SAFE_MACROS 0
  #undef CYTHON_UNPACK_METHODS
  #define CYTHON_UNPACK_METHODS 0
  #undef CYTHON_FAST_THREAD_STATE
  #define CYTHON_FAST_THREAD_STATE 0
  #undef CYTHON_FAST_PYCALL
  #define CYTHON_FAST_PYCALL 0
  #undef CYTHON_PEP489_MULTI_PHASE_INIT
  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
  #undef CYTHON_USE_TP_FINALIZE
  #define CYTHON_USE_TP_FINALIZE 0
  #undef CYTHON_USE_DICT_VERSIONS
  #define CYTHON_USE_DICT_VERSIONS 0
  #undef CYTHON_USE_EXC_INFO_STACK
  #define CYTHON_USE_EXC_INFO_STACK 0
#elif defined(PYSTON_VERSION)
  #define CYTHON_COMPILING_IN_PYPY 0
  #define CYTHON_COMPILING_IN_PYSTON 1
  #define CYTHON_COMPILING_IN_CPYTHON 0
  #ifndef CYTHON_USE_TYPE_SLOTS
    #define CYTHON_USE_TYPE_SLOTS 1
  #endif
  #undef CYTHON_USE_PYTYPE_LOOKUP
  #define CYTHON_USE_PYTYPE_LOOKUP 0
  #undef CYTHON_USE_ASYNC_SLOTS
  #define CYTHON_USE_ASYNC_SLOTS 0
  #undef CYTHON_USE_PYLIST_INTERNALS
  #define CYTHON_USE_PYLIST_INTERNALS 0
  #ifndef CYTHON_USE_UNICODE_INTERNALS
    #define CYTHON_USE_UNICODE_INTERNALS 1
  #endif
  #undef CYTHON_USE_UNICODE_WRITER
  #define CYTHON_USE_UNICODE_WRITER 0
  #undef CYTHON_USE_PYLONG_INTERNALS
  #define CYTHON_USE_PYLONG_INTERNALS 0
  #ifndef CYTHON_AVOID_BORROWED_REFS
    #define CYTHON_AVOID_BORROWED_REFS 0
  #endif
  #ifndef CYTHON_ASSUME_SAFE_MACROS
    #define CYTHON_ASSUME_SAFE_MACROS 1
  #endif
  #ifndef CYTHON_UNPACK_METHODS
    #define CYTHON_UNPACK_METHODS 1
  #endif
  #undef CYTHON_FAST_THREAD_STATE
  #define CYTHON_FAST_THREAD_STATE 0
  #undef CYTHON_FAST_PYCALL
  #define CYTHON_FAST_PYCALL 0
  #undef CYTHON_PEP489_MULTI_PHASE_INIT
  #define CYTHON_PEP489_MULTI_PHASE_INIT 0
  #undef CYTHON_USE_TP_FINALIZE
  #define CYTHON_USE_TP_FINALIZE 0
  #undef CYTHON_USE_DICT_VERSIONS
  #define CYTHON_USE_DICT_VERSIONS 0
  #undef CYTHON_USE_EXC_INFO_STACK
  #define CYTHON_USE_EXC_INFO_STACK 0
#else
  #define CYTHON_COMPILING_IN_PYPY 0
  #define CYTHON_COMPILING_IN_PYSTON 0
  #define CYTHON_COMPILING_IN_CPYTHON 1
  #ifndef CYTHON_USE_TYPE_SLOTS
    #define CYTHON_USE_TYPE_SLOTS 1
  #endif
  #if PY_VERSION_HEX < 0x02070000
    #undef CYTHON_USE_PYTYPE_LOOKUP
    #define CYTHON_USE_PYTYPE_LOOKUP 0
  #elif !defined(CYTHON_USE_PYTYPE_LOOKUP)
    #define CYTHON_USE_PYTYPE_LOOKUP 1
  #endif
  #if PY_MAJOR_VERSION < 3
    #undef CYTHON_USE_ASYNC_SLOTS
    #define CYTHON_USE_ASYNC_SLOTS 0
  #elif !defined(CYTHON_USE_ASYNC_SLOTS)
    #define CYTHON_USE_ASYNC_SLOTS 1
  #endif
  #if PY_VERSION_HEX < 0x02070000
    #undef CYTHON_USE_PYLONG_INTERNALS
    #define CYTHON_USE_PYLONG_INTERNALS 0
  #elif !defined(CYTHON_USE_PYLONG_INTERNALS)
    #define CYTHON_USE_PYLONG_INTERNALS 1
  #endif
  #ifndef CYTHON_USE_PYLIST_INTERNALS
    #define CYTHON_USE_PYLIST_INTERNALS 1
  #endif
  #ifndef CYTHON_USE_UNICODE_INTERNALS
    #define CYTHON_USE_UNICODE_INTERNALS 1
  #endif
  #if PY_VERSION_HEX < 0x030300F0
    #undef CYTHON_USE_UNICODE_WRITER
    #define CYTHON_USE_UNICODE_WRITER 0
  #elif !defined(CYTHON_USE_UNICODE_WRITER)
    #define CYTHON_USE_UNICODE_WRITER 1
  #endif
  #ifndef CYTHON_AVOID_BORROWED_REFS
    #define CYTHON_AVOID_BORROWED_REFS 0
  #endif
  #ifndef CYTHON_ASSUME_SAFE_MACROS
    #define CYTHON_ASSUME_SAFE_MACROS 1
  #endif
  #ifndef CYTHON_UNPACK_METHODS
    #define CYTHON_UNPACK_METHODS 1
  #endif
  #ifndef CYTHON_FAST_THREAD_STATE
    #define CYTHON_FAST_THREAD_STATE 1
  #endif
  #ifndef CYTHON_FAST_PYCALL
    #define CYTHON_FAST_PYCALL 1
  #endif
  #ifndef CYTHON_PEP489_MULTI_PHASE_INIT
    #define CYTHON_PEP489_MULTI_PHASE_INIT (PY_VERSION_HEX >= 0x03050000)
  #endif
  #ifndef CYTHON_USE_TP_FINALIZE
    #define CYTHON_USE_TP_FINALIZE (PY_VERSION_HEX >= 0x030400a1)
  #endif
  #ifndef CYTHON_USE_DICT_VERSIONS
    #define CYTHON_USE_DICT_VERSIONS (PY_VERSION_HEX >= 0x030600B1)
  #endif
  #ifndef CYTHON_USE_EXC_INFO_STACK
    #define CYTHON_USE_EXC_INFO_STACK (PY_VERSION_HEX >= 0x030700A3)
  #endif
#endif
#if !defined(CYTHON_FAST_PYCCALL)
#define CYTHON_FAST_PYCCALL  (CYTHON_FAST_PYCALL && PY_VERSION_HEX >= 0x030600B1)
#endif
#if CYTHON_USE_PYLONG_INTERNALS
  #include "longintrepr.h"
  #undef SHIFT
  #undef BASE
  #undef MASK
  #ifdef SIZEOF_VOID_P
    enum { __pyx_check_sizeof_voidp = 1 / (int)(SIZEOF_VOID_P == sizeof(void*)) };
  #endif
#endif
#ifndef __has_attribute
  #define __has_attribute(x) 0
#endif
#ifndef __has_cpp_attribute
  #define __has_cpp_attribute(x) 0
#endif
#ifndef CYTHON_RESTRICT
  #if defined(__GNUC__)
    #define CYTHON_RESTRICT __restrict__
  #elif defined(_MSC_VER) && _MSC_VER >= 1400
    #define CYTHON_RESTRICT __restrict
  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
    #define CYTHON_RESTRICT restrict
  #else
    #define CYTHON_RESTRICT
  #endif
#endif
#ifndef CYTHON_UNUSED
# if defined(__GNUC__)
#   if !(defined(__cplusplus)) || (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
#     define CYTHON_UNUSED __attribute__ ((__unused__))
#   else
#     define CYTHON_UNUSED
#   endif
# elif defined(__ICC) || (defined(__INTEL_COMPILER) && !defined(_MSC_VER))
#   define CYTHON_UNUSED __attribute__ ((__unused__))
# else
#   define CYTHON_UNUSED
# endif
#endif
#ifndef CYTHON_MAYBE_UNUSED_VAR
#  if defined(__cplusplus)
     template<class T> void CYTHON_MAYBE_UNUSED_VAR( const T& ) { }
#  else
#    define CYTHON_MAYBE_UNUSED_VAR(x) (void)(x)
#  endif
#endif
#ifndef CYTHON_NCP_UNUSED
# if CYTHON_COMPILING_IN_CPYTHON
#  define CYTHON_NCP_UNUSED
# else
#  define CYTHON_NCP_UNUSED CYTHON_UNUSED
# endif
#endif
#define __Pyx_void_to_None(void_result) ((void)(void_result), Py_INCREF(Py_None), Py_None)
#ifdef _MSC_VER
    #ifndef _MSC_STDINT_H_
        #if _MSC_VER < 1300
           typedef unsigned char     uint8_t;
           typedef unsigned int      uint32_t;
        #else
           typedef unsigned __int8   uint8_t;
           typedef unsigned __int32  uint32_t;
        #endif
    #endif
#else
   #include <stdint.h>
#endif
#ifndef CYTHON_FALLTHROUGH
  #if defined(__cplusplus) && __cplusplus >= 201103L
    #if __has_cpp_attribute(fallthrough)
      #define CYTHON_FALLTHROUGH [[fallthrough]]
    #elif __has_cpp_attribute(clang::fallthrough)
      #define CYTHON_FALLTHROUGH [[clang::fallthrough]]
    #elif __has_cpp_attribute(gnu::fallthrough)
      #define CYTHON_FALLTHROUGH [[gnu::fallthrough]]
    #endif
  #endif
  #ifndef CYTHON_FALLTHROUGH
    #if __has_attribute(fallthrough)
      #define CYTHON_FALLTHROUGH __attribute__((fallthrough))
    #else
      #define CYTHON_FALLTHROUGH
    #endif
  #endif
  #if defined(__clang__ ) && defined(__apple_build_version__)
    #if __apple_build_version__ < 7000000
      #undef  CYTHON_FALLTHROUGH
      #define CYTHON_FALLTHROUGH
    #endif
  #endif
#endif

#ifndef CYTHON_INLINE
  #if defined(__clang__)
    #define CYTHON_INLINE __inline__ __attribute__ ((__unused__))
  #elif defined(__GNUC__)
    #define CYTHON_INLINE __inline__
  #elif defined(_MSC_VER)
    #define CYTHON_INLINE __inline
  #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
    #define CYTHON_INLINE inline
  #else
    #define CYTHON_INLINE
  #endif
#endif

#if CYTHON_COMPILING_IN_PYPY && PY_VERSION_HEX < 0x02070600 && !defined(Py_OptimizeFlag)
  #define Py_OptimizeFlag 0
#endif
#define __PYX_BUILD_PY_SSIZE_T "n"
#define CYTHON_FORMAT_SSIZE_T "z"
#if PY_MAJOR_VERSION < 3
  #define __Pyx_BUILTIN_MODULE_NAME "__builtin__"
  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
          PyCode_New(a+k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
  #define __Pyx_DefaultClassType PyClass_Type
#else
  #define __Pyx_BUILTIN_MODULE_NAME "builtins"
#if PY_VERSION_HEX >= 0x030800A4 && PY_VERSION_HEX < 0x030800B2
  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
          PyCode_New(a, 0, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
#else
  #define __Pyx_PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)\
          PyCode_New(a, k, l, s, f, code, c, n, v, fv, cell, fn, name, fline, lnos)
#endif
  #define __Pyx_DefaultClassType PyType_Type
#endif
#ifndef Py_TPFLAGS_CHECKTYPES
  #define Py_TPFLAGS_CHECKTYPES 0
#endif
#ifndef Py_TPFLAGS_HAVE_INDEX
  #define Py_TPFLAGS_HAVE_INDEX 0
#endif
#ifndef Py_TPFLAGS_HAVE_NEWBUFFER
  #define Py_TPFLAGS_HAVE_NEWBUFFER 0
#endif
#ifndef Py_TPFLAGS_HAVE_FINALIZE
  #define Py_TPFLAGS_HAVE_FINALIZE 0
#endif
#ifndef METH_STACKLESS
  #define METH_STACKLESS 0
#endif
#if PY_VERSION_HEX <= 0x030700A3 || !defined(METH_FASTCALL)
  #ifndef METH_FASTCALL
     #define METH_FASTCALL 0x80
  #endif
  typedef PyObject *(*__Pyx_PyCFunctionFast) (PyObject *self, PyObject *const *args, Py_ssize_t nargs);
  typedef PyObject *(*__Pyx_PyCFunctionFastWithKeywords) (PyObject *self, PyObject *const *args,
                                                          Py_ssize_t nargs, PyObject *kwnames);
#else
  #define __Pyx_PyCFunctionFast _PyCFunctionFast
  #define __Pyx_PyCFunctionFastWithKeywords _PyCFunctionFastWithKeywords
#endif
#if CYTHON_FAST_PYCCALL
#define __Pyx_PyFastCFunction_Check(func)\
    ((PyCFunction_Check(func) && (METH_FASTCALL == (PyCFunction_GET_FLAGS(func) & ~(METH_CLASS | METH_STATIC | METH_COEXIST | METH_KEYWORDS | METH_STACKLESS)))))
#else
#define __Pyx_PyFastCFunction_Check(func) 0
#endif
#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Malloc)
  #define PyObject_Malloc(s)   PyMem_Malloc(s)
  #define PyObject_Free(p)     PyMem_Free(p)
  #define PyObject_Realloc(p)  PyMem_Realloc(p)
#endif
#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX < 0x030400A1
  #define PyMem_RawMalloc(n)           PyMem_Malloc(n)
  #define PyMem_RawRealloc(p, n)       PyMem_Realloc(p, n)
  #define PyMem_RawFree(p)             PyMem_Free(p)
#endif
#if CYTHON_COMPILING_IN_PYSTON
  #define __Pyx_PyCode_HasFreeVars(co)  PyCode_HasFreeVars(co)
  #define __Pyx_PyFrame_SetLineNumber(frame, lineno) PyFrame_SetLineNumber(frame, lineno)
#else
  #define __Pyx_PyCode_HasFreeVars(co)  (PyCode_GetNumFree(co) > 0)
  #define __Pyx_PyFrame_SetLineNumber(frame, lineno)  (frame)->f_lineno = (lineno)
#endif
#if !CYTHON_FAST_THREAD_STATE || PY_VERSION_HEX < 0x02070000
  #define __Pyx_PyThreadState_Current PyThreadState_GET()
#elif PY_VERSION_HEX >= 0x03060000
  #define __Pyx_PyThreadState_Current _PyThreadState_UncheckedGet()
#elif PY_VERSION_HEX >= 0x03000000
  #define __Pyx_PyThreadState_Current PyThreadState_GET()
#else
  #define __Pyx_PyThreadState_Current _PyThreadState_Current
#endif
#if PY_VERSION_HEX < 0x030700A2 && !defined(PyThread_tss_create) && !defined(Py_tss_NEEDS_INIT)
#include "pythread.h"
#define Py_tss_NEEDS_INIT 0
typedef int Py_tss_t;
static CYTHON_INLINE int PyThread_tss_create(Py_tss_t *key) {
  *key = PyThread_create_key();
  return 0;
}
static CYTHON_INLINE Py_tss_t * PyThread_tss_alloc(void) {
  Py_tss_t *key = (Py_tss_t *)PyObject_Malloc(sizeof(Py_tss_t));
  *key = Py_tss_NEEDS_INIT;
  return key;
}
static CYTHON_INLINE void PyThread_tss_free(Py_tss_t *key) {
  PyObject_Free(key);
}
static CYTHON_INLINE int PyThread_tss_is_created(Py_tss_t *key) {
  return *key != Py_tss_NEEDS_INIT;
}
static CYTHON_INLINE void PyThread_tss_delete(Py_tss_t *key) {
  PyThread_delete_key(*key);
  *key = Py_tss_NEEDS_INIT;
}
static CYTHON_INLINE int PyThread_tss_set(Py_tss_t *key, void *value) {
  return PyThread_set_key_value(*key, value);
}
static CYTHON_INLINE void * PyThread_tss_get(Py_tss_t *key) {
  return PyThread_get_key_value(*key);
}
#endif
#if CYTHON_COMPILING_IN_CPYTHON || defined(_PyDict_NewPresized)
#define __Pyx_PyDict_NewPresized(n)  ((n <= 8) ? PyDict_New() : _PyDict_NewPresized(n))
#else
#define __Pyx_PyDict_NewPresized(n)  PyDict_New()
#endif
#if PY_MAJOR_VERSION >= 3 || CYTHON_FUTURE_DIVISION
  #define __Pyx_PyNumber_Divide(x,y)         PyNumber_TrueDivide(x,y)
  #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceTrueDivide(x,y)
#else
  #define __Pyx_PyNumber_Divide(x,y)         PyNumber_Divide(x,y)
  #define __Pyx_PyNumber_InPlaceDivide(x,y)  PyNumber_InPlaceDivide(x,y)
#endif
#if CYTHON_COMPILING_IN_CPYTHON && PY_VERSION_HEX >= 0x030500A1 && CYTHON_USE_UNICODE_INTERNALS
#define __Pyx_PyDict_GetItemStr(dict, name)  _PyDict_GetItem_KnownHash(dict, name, ((PyASCIIObject *) name)->hash)
#else
#define __Pyx_PyDict_GetItemStr(dict, name)  PyDict_GetItem(dict, name)
#endif
#if PY_VERSION_HEX > 0x03030000 && defined(PyUnicode_KIND)
  #define CYTHON_PEP393_ENABLED 1
  #define __Pyx_PyUnicode_READY(op)       (likely(PyUnicode_IS_READY(op)) ?\
                                              0 : _PyUnicode_Ready((PyObject *)(op)))
  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_LENGTH(u)
  #define __Pyx_PyUnicode_READ_CHAR(u, i) PyUnicode_READ_CHAR(u, i)
  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   PyUnicode_MAX_CHAR_VALUE(u)
  #define __Pyx_PyUnicode_KIND(u)         PyUnicode_KIND(u)
  #define __Pyx_PyUnicode_DATA(u)         PyUnicode_DATA(u)
  #define __Pyx_PyUnicode_READ(k, d, i)   PyUnicode_READ(k, d, i)
  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  PyUnicode_WRITE(k, d, i, ch)
  #define __Pyx_PyUnicode_IS_TRUE(u)      (0 != (likely(PyUnicode_IS_READY(u)) ? PyUnicode_GET_LENGTH(u) : PyUnicode_GET_SIZE(u)))
#else
  #define CYTHON_PEP393_ENABLED 0
  #define PyUnicode_1BYTE_KIND  1
  #define PyUnicode_2BYTE_KIND  2
  #define PyUnicode_4BYTE_KIND  4
  #define __Pyx_PyUnicode_READY(op)       (0)
  #define __Pyx_PyUnicode_GET_LENGTH(u)   PyUnicode_GET_SIZE(u)
  #define __Pyx_PyUnicode_READ_CHAR(u, i) ((Py_UCS4)(PyUnicode_AS_UNICODE(u)[i]))
  #define __Pyx_PyUnicode_MAX_CHAR_VALUE(u)   ((sizeof(Py_UNICODE) == 2) ? 65535 : 1114111)
  #define __Pyx_PyUnicode_KIND(u)         (sizeof(Py_UNICODE))
  #define __Pyx_PyUnicode_DATA(u)         ((void*)PyUnicode_AS_UNICODE(u))
  #define __Pyx_PyUnicode_READ(k, d, i)   ((void)(k), (Py_UCS4)(((Py_UNICODE*)d)[i]))
  #define __Pyx_PyUnicode_WRITE(k, d, i, ch)  (((void)(k)), ((Py_UNICODE*)d)[i] = ch)
  #define __Pyx_PyUnicode_IS_TRUE(u)      (0 != PyUnicode_GET_SIZE(u))
#endif
#if CYTHON_COMPILING_IN_PYPY
  #define __Pyx_PyUnicode_Concat(a, b)      PyNumber_Add(a, b)
  #define __Pyx_PyUnicode_ConcatSafe(a, b)  PyNumber_Add(a, b)
#else
  #define __Pyx_PyUnicode_Concat(a, b)      PyUnicode_Concat(a, b)
  #define __Pyx_PyUnicode_ConcatSafe(a, b)  ((unlikely((a) == Py_None) || unlikely((b) == Py_None)) ?\
      PyNumber_Add(a, b) : __Pyx_PyUnicode_Concat(a, b))
#endif
#if CYTHON_COMPILING_IN_PYPY && !defined(PyUnicode_Contains)
  #define PyUnicode_Contains(u, s)  PySequence_Contains(u, s)
#endif
#if CYTHON_COMPILING_IN_PYPY && !defined(PyByteArray_Check)
  #define PyByteArray_Check(obj)  PyObject_TypeCheck(obj, &PyByteArray_Type)
#endif
#if CYTHON_COMPILING_IN_PYPY && !defined(PyObject_Format)
  #define PyObject_Format(obj, fmt)  PyObject_CallMethod(obj, "__format__", "O", fmt)
#endif
#define __Pyx_PyString_FormatSafe(a, b)   ((unlikely((a) == Py_None || (PyString_Check(b) && !PyString_CheckExact(b)))) ? PyNumber_Remainder(a, b) : __Pyx_PyString_Format(a, b))
#define __Pyx_PyUnicode_FormatSafe(a, b)  ((unlikely((a) == Py_None || (PyUnicode_Check(b) && !PyUnicode_CheckExact(b)))) ? PyNumber_Remainder(a, b) : PyUnicode_Format(a, b))
#if PY_MAJOR_VERSION >= 3
  #define __Pyx_PyString_Format(a, b)  PyUnicode_Format(a, b)
#else
  #define __Pyx_PyString_Format(a, b)  PyString_Format(a, b)
#endif
#if PY_MAJOR_VERSION < 3 && !defined(PyObject_ASCII)
  #define PyObject_ASCII(o)            PyObject_Repr(o)
#endif
#if PY_MAJOR_VERSION >= 3
  #define PyBaseString_Type            PyUnicode_Type
  #define PyStringObject               PyUnicodeObject
  #define PyString_Type                PyUnicode_Type
  #define PyString_Check               PyUnicode_Check
  #define PyString_CheckExact          PyUnicode_CheckExact
  #define PyObject_Unicode             PyObject_Str
#endif
#if PY_MAJOR_VERSION >= 3
  #define __Pyx_PyBaseString_Check(obj) PyUnicode_Check(obj)
  #define __Pyx_PyBaseString_CheckExact(obj) PyUnicode_CheckExact(obj)
#else
  #define __Pyx_PyBaseString_Check(obj) (PyString_Check(obj) || PyUnicode_Check(obj))
  #define __Pyx_PyBaseString_CheckExact(obj) (PyString_CheckExact(obj) || PyUnicode_CheckExact(obj))
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#ifndef PySet_CheckExact
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#if CYTHON_ASSUME_SAFE_MACROS
  #define __Pyx_PySequence_SIZE(seq)  Py_SIZE(seq)
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  #define __Pyx_PySequence_SIZE(seq)  PySequence_Size(seq)
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#if PY_MAJOR_VERSION >= 3
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  #define PyInt_Type                   PyLong_Type
  #define PyInt_Check(op)              PyLong_Check(op)
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  #define PyInt_FromString             PyLong_FromString
  #define PyInt_FromUnicode            PyLong_FromUnicode
  #define PyInt_FromLong               PyLong_FromLong
  #define PyInt_FromSize_t             PyLong_FromSize_t
  #define PyInt_FromSsize_t            PyLong_FromSsize_t
  #define PyInt_AsLong                 PyLong_AsLong
  #define PyInt_AS_LONG                PyLong_AS_LONG
  #define PyInt_AsSsize_t              PyLong_AsSsize_t
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#if PY_MAJOR_VERSION >= 3
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#if PY_MAJOR_VERSION >= 3 && CYTHON_COMPILING_IN_PYPY
  #ifndef PyUnicode_InternFromString
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#if PY_VERSION_HEX < 0x030200A4
  typedef long Py_hash_t;
  #define __Pyx_PyInt_FromHash_t PyInt_FromLong
  #define __Pyx_PyInt_AsHash_t   PyInt_AsLong
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  #define __Pyx_PyInt_FromHash_t PyInt_FromSsize_t
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#if PY_MAJOR_VERSION >= 3
  #define __Pyx_PyMethod_New(func, self, klass) ((self) ? PyMethod_New(func, self) : (Py_INCREF(func), func))
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  #if PY_VERSION_HEX >= 0x030500B1
    #define __Pyx_PyAsyncMethodsStruct PyAsyncMethods
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  #define __Pyx_PyType_AsAsync(obj) NULL
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#ifndef __Pyx_PyAsyncMethodsStruct
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#if defined(WIN32) || defined(MS_WINDOWS)
  #define _USE_MATH_DEFINES
#endif
#include <math.h>
#ifdef NAN
#define __PYX_NAN() ((float) NAN)
#else
static CYTHON_INLINE float __PYX_NAN() {
  float value;
  memset(&value, 0xFF, sizeof(value));
  return value;
}
#endif
#if defined(__CYGWIN__) && defined(_LDBL_EQ_DBL)
#define __Pyx_truncl trunc
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#define __Pyx_truncl truncl
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#define __PYX_ERR(f_index, lineno, Ln_error) \
{ \
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}

#ifndef __PYX_EXTERN_C
  #ifdef __cplusplus
    #define __PYX_EXTERN_C extern "C"
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    #define __PYX_EXTERN_C extern
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#define __PYX_HAVE__skimage__graph__heap
#define __PYX_HAVE_API__skimage__graph__heap
/* Early includes */
#include <string.h>
#include <stdlib.h>
#include "pyport.h"
#ifdef _OPENMP
#include <omp.h>
#endif /* _OPENMP */

#if defined(PYREX_WITHOUT_ASSERTIONS) && !defined(CYTHON_WITHOUT_ASSERTIONS)
#define CYTHON_WITHOUT_ASSERTIONS
#endif

typedef struct {PyObject **p; const char *s; const Py_ssize_t n; const char* encoding;
                const char is_unicode; const char is_str; const char intern; } __Pyx_StringTabEntry;

#define __PYX_DEFAULT_STRING_ENCODING_IS_ASCII 0
#define __PYX_DEFAULT_STRING_ENCODING_IS_UTF8 0
#define __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT (PY_MAJOR_VERSION >= 3 && __PYX_DEFAULT_STRING_ENCODING_IS_UTF8)
#define __PYX_DEFAULT_STRING_ENCODING ""
#define __Pyx_PyObject_FromString __Pyx_PyBytes_FromString
#define __Pyx_PyObject_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
#define __Pyx_uchar_cast(c) ((unsigned char)c)
#define __Pyx_long_cast(x) ((long)x)
#define __Pyx_fits_Py_ssize_t(v, type, is_signed)  (\
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    (sizeof(type) == sizeof(Py_ssize_t) &&\
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                               v == (type)PY_SSIZE_T_MAX)))  )
static CYTHON_INLINE int __Pyx_is_valid_index(Py_ssize_t i, Py_ssize_t limit) {
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}
#if defined (__cplusplus) && __cplusplus >= 201103L
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    #define __Pyx_sst_abs(value) std::abs(value)
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#elif SIZEOF_LONG >= SIZEOF_SIZE_T
    #define __Pyx_sst_abs(value) labs(value)
#elif defined (_MSC_VER)
    #define __Pyx_sst_abs(value) ((Py_ssize_t)_abs64(value))
#elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
    #define __Pyx_sst_abs(value) llabs(value)
#elif defined (__GNUC__)
    #define __Pyx_sst_abs(value) __builtin_llabs(value)
#else
    #define __Pyx_sst_abs(value) ((value<0) ? -value : value)
#endif
static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject*);
static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject*, Py_ssize_t* length);
#define __Pyx_PyByteArray_FromString(s) PyByteArray_FromStringAndSize((const char*)s, strlen((const char*)s))
#define __Pyx_PyByteArray_FromStringAndSize(s, l) PyByteArray_FromStringAndSize((const char*)s, l)
#define __Pyx_PyBytes_FromString        PyBytes_FromString
#define __Pyx_PyBytes_FromStringAndSize PyBytes_FromStringAndSize
static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char*);
#if PY_MAJOR_VERSION < 3
    #define __Pyx_PyStr_FromString        __Pyx_PyBytes_FromString
    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyBytes_FromStringAndSize
#else
    #define __Pyx_PyStr_FromString        __Pyx_PyUnicode_FromString
    #define __Pyx_PyStr_FromStringAndSize __Pyx_PyUnicode_FromStringAndSize
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#define __Pyx_PyBytes_AsWritableString(s)     ((char*) PyBytes_AS_STRING(s))
#define __Pyx_PyBytes_AsWritableSString(s)    ((signed char*) PyBytes_AS_STRING(s))
#define __Pyx_PyBytes_AsWritableUString(s)    ((unsigned char*) PyBytes_AS_STRING(s))
#define __Pyx_PyBytes_AsString(s)     ((const char*) PyBytes_AS_STRING(s))
#define __Pyx_PyBytes_AsSString(s)    ((const signed char*) PyBytes_AS_STRING(s))
#define __Pyx_PyBytes_AsUString(s)    ((const unsigned char*) PyBytes_AS_STRING(s))
#define __Pyx_PyObject_AsWritableString(s)    ((char*) __Pyx_PyObject_AsString(s))
#define __Pyx_PyObject_AsWritableSString(s)    ((signed char*) __Pyx_PyObject_AsString(s))
#define __Pyx_PyObject_AsWritableUString(s)    ((unsigned char*) __Pyx_PyObject_AsString(s))
#define __Pyx_PyObject_AsSString(s)    ((const signed char*) __Pyx_PyObject_AsString(s))
#define __Pyx_PyObject_AsUString(s)    ((const unsigned char*) __Pyx_PyObject_AsString(s))
#define __Pyx_PyObject_FromCString(s)  __Pyx_PyObject_FromString((const char*)s)
#define __Pyx_PyBytes_FromCString(s)   __Pyx_PyBytes_FromString((const char*)s)
#define __Pyx_PyByteArray_FromCString(s)   __Pyx_PyByteArray_FromString((const char*)s)
#define __Pyx_PyStr_FromCString(s)     __Pyx_PyStr_FromString((const char*)s)
#define __Pyx_PyUnicode_FromCString(s) __Pyx_PyUnicode_FromString((const char*)s)
static CYTHON_INLINE size_t __Pyx_Py_UNICODE_strlen(const Py_UNICODE *u) {
    const Py_UNICODE *u_end = u;
    while (*u_end++) ;
    return (size_t)(u_end - u - 1);
}
#define __Pyx_PyUnicode_FromUnicode(u)       PyUnicode_FromUnicode(u, __Pyx_Py_UNICODE_strlen(u))
#define __Pyx_PyUnicode_FromUnicodeAndLength PyUnicode_FromUnicode
#define __Pyx_PyUnicode_AsUnicode            PyUnicode_AsUnicode
#define __Pyx_NewRef(obj) (Py_INCREF(obj), obj)
#define __Pyx_Owned_Py_None(b) __Pyx_NewRef(Py_None)
static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b);
static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject*);
static CYTHON_INLINE int __Pyx_PyObject_IsTrueAndDecref(PyObject*);
static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x);
#define __Pyx_PySequence_Tuple(obj)\
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static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject*);
static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t);
#if CYTHON_ASSUME_SAFE_MACROS
#define __pyx_PyFloat_AsDouble(x) (PyFloat_CheckExact(x) ? PyFloat_AS_DOUBLE(x) : PyFloat_AsDouble(x))
#else
#define __pyx_PyFloat_AsDouble(x) PyFloat_AsDouble(x)
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#define __pyx_PyFloat_AsFloat(x) ((float) __pyx_PyFloat_AsDouble(x))
#if PY_MAJOR_VERSION >= 3
#define __Pyx_PyNumber_Int(x) (PyLong_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Long(x))
#else
#define __Pyx_PyNumber_Int(x) (PyInt_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Int(x))
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#define __Pyx_PyNumber_Float(x) (PyFloat_CheckExact(x) ? __Pyx_NewRef(x) : PyNumber_Float(x))
#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
static int __Pyx_sys_getdefaultencoding_not_ascii;
static int __Pyx_init_sys_getdefaultencoding_params(void) {
    PyObject* sys;
    PyObject* default_encoding = NULL;
    PyObject* ascii_chars_u = NULL;
    PyObject* ascii_chars_b = NULL;
    const char* default_encoding_c;
    sys = PyImport_ImportModule("sys");
    if (!sys) goto bad;
    default_encoding = PyObject_CallMethod(sys, (char*) "getdefaultencoding", NULL);
    Py_DECREF(sys);
    if (!default_encoding) goto bad;
    default_encoding_c = PyBytes_AsString(default_encoding);
    if (!default_encoding_c) goto bad;
    if (strcmp(default_encoding_c, "ascii") == 0) {
        __Pyx_sys_getdefaultencoding_not_ascii = 0;
    } else {
        char ascii_chars[128];
        int c;
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            ascii_chars[c] = c;
        }
        __Pyx_sys_getdefaultencoding_not_ascii = 1;
        ascii_chars_u = PyUnicode_DecodeASCII(ascii_chars, 128, NULL);
        if (!ascii_chars_u) goto bad;
        ascii_chars_b = PyUnicode_AsEncodedString(ascii_chars_u, default_encoding_c, NULL);
        if (!ascii_chars_b || !PyBytes_Check(ascii_chars_b) || memcmp(ascii_chars, PyBytes_AS_STRING(ascii_chars_b), 128) != 0) {
            PyErr_Format(
                PyExc_ValueError,
                "This module compiled with c_string_encoding=ascii, but default encoding '%.200s' is not a superset of ascii.",
                default_encoding_c);
            goto bad;
        }
        Py_DECREF(ascii_chars_u);
        Py_DECREF(ascii_chars_b);
    }
    Py_DECREF(default_encoding);
    return 0;
bad:
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    Py_XDECREF(ascii_chars_u);
    Py_XDECREF(ascii_chars_b);
    return -1;
}
#endif
#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT && PY_MAJOR_VERSION >= 3
#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_DecodeUTF8(c_str, size, NULL)
#else
#define __Pyx_PyUnicode_FromStringAndSize(c_str, size) PyUnicode_Decode(c_str, size, __PYX_DEFAULT_STRING_ENCODING, NULL)
#if __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
static char* __PYX_DEFAULT_STRING_ENCODING;
static int __Pyx_init_sys_getdefaultencoding_params(void) {
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    if (!sys) goto bad;
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    Py_DECREF(sys);
    if (!default_encoding) goto bad;
    default_encoding_c = PyBytes_AsString(default_encoding);
    if (!default_encoding_c) goto bad;
    __PYX_DEFAULT_STRING_ENCODING = (char*) malloc(strlen(default_encoding_c) + 1);
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bad:
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/* Test for GCC > 2.95 */
#if defined(__GNUC__)     && (__GNUC__ > 2 || (__GNUC__ == 2 && (__GNUC_MINOR__ > 95)))
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#else /* !__GNUC__ or GCC < 2.95 */
  #define likely(x)   (x)
  #define unlikely(x) (x)
#endif /* __GNUC__ */
static CYTHON_INLINE void __Pyx_pretend_to_initialize(void* ptr) { (void)ptr; }

static PyObject *__pyx_m = NULL;
static PyObject *__pyx_d;
static PyObject *__pyx_b;
static PyObject *__pyx_cython_runtime = NULL;
static PyObject *__pyx_empty_tuple;
static PyObject *__pyx_empty_bytes;
static PyObject *__pyx_empty_unicode;
static int __pyx_lineno;
static int __pyx_clineno = 0;
static const char * __pyx_cfilenm= __FILE__;
static const char *__pyx_filename;


static const char *__pyx_f[] = {
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};
/* ForceInitThreads.proto */
#ifndef __PYX_FORCE_INIT_THREADS
  #define __PYX_FORCE_INIT_THREADS 0
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/* NoFastGil.proto */
#define __Pyx_PyGILState_Ensure PyGILState_Ensure
#define __Pyx_PyGILState_Release PyGILState_Release
#define __Pyx_FastGIL_Remember()
#define __Pyx_FastGIL_Forget()
#define __Pyx_FastGilFuncInit()


/* "skimage/graph/heap.pxd":9
 * 
 * # determine datatypes for heap
 * ctypedef double VALUE_T             # <<<<<<<<<<<<<<
 * ctypedef Py_ssize_t REFERENCE_T
 * ctypedef REFERENCE_T INDEX_T
 */
typedef double __pyx_t_7skimage_5graph_4heap_VALUE_T;

/* "skimage/graph/heap.pxd":10
 * # determine datatypes for heap
 * ctypedef double VALUE_T
 * ctypedef Py_ssize_t REFERENCE_T             # <<<<<<<<<<<<<<
 * ctypedef REFERENCE_T INDEX_T
 * ctypedef unsigned char BOOL_T
 */
typedef Py_ssize_t __pyx_t_7skimage_5graph_4heap_REFERENCE_T;

/* "skimage/graph/heap.pxd":11
 * ctypedef double VALUE_T
 * ctypedef Py_ssize_t REFERENCE_T
 * ctypedef REFERENCE_T INDEX_T             # <<<<<<<<<<<<<<
 * ctypedef unsigned char BOOL_T
 * ctypedef unsigned char LEVELS_T
 */
typedef __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_t_7skimage_5graph_4heap_INDEX_T;

/* "skimage/graph/heap.pxd":12
 * ctypedef Py_ssize_t REFERENCE_T
 * ctypedef REFERENCE_T INDEX_T
 * ctypedef unsigned char BOOL_T             # <<<<<<<<<<<<<<
 * ctypedef unsigned char LEVELS_T
 * 
 */
typedef unsigned char __pyx_t_7skimage_5graph_4heap_BOOL_T;

/* "skimage/graph/heap.pxd":13
 * ctypedef REFERENCE_T INDEX_T
 * ctypedef unsigned char BOOL_T
 * ctypedef unsigned char LEVELS_T             # <<<<<<<<<<<<<<
 * 
 * cdef class BinaryHeap:
 */
typedef unsigned char __pyx_t_7skimage_5graph_4heap_LEVELS_T;

/*--- Type declarations ---*/
struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap;
struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap;

/* "skimage/graph/heap.pxd":15
 * ctypedef unsigned char LEVELS_T
 * 
 * cdef class BinaryHeap:             # <<<<<<<<<<<<<<
 *     cdef readonly INDEX_T count
 *     cdef readonly LEVELS_T levels, min_levels
 */
struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap {
  PyObject_HEAD
  struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *__pyx_vtab;
  __pyx_t_7skimage_5graph_4heap_INDEX_T count;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T levels;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T min_levels;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *_values;
  __pyx_t_7skimage_5graph_4heap_REFERENCE_T *_references;
  __pyx_t_7skimage_5graph_4heap_REFERENCE_T _popped_ref;
};


/* "skimage/graph/heap.pxd":30
 *     cdef VALUE_T pop_fast(self) nogil
 * 
 * cdef class FastUpdateBinaryHeap(BinaryHeap):             # <<<<<<<<<<<<<<
 *     cdef readonly REFERENCE_T max_reference
 *     cdef INDEX_T *_crossref
 */
struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap {
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  __pyx_t_7skimage_5graph_4heap_REFERENCE_T max_reference;
  __pyx_t_7skimage_5graph_4heap_INDEX_T *_crossref;
  __pyx_t_7skimage_5graph_4heap_BOOL_T _invalid_ref;
  __pyx_t_7skimage_5graph_4heap_BOOL_T _pushed;
};



/* "skimage/graph/heap.pyx":48
 * 
 * 
 * cdef class BinaryHeap:             # <<<<<<<<<<<<<<
 *     """BinaryHeap(initial_capacity=128)
 * 
 */

struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap {
  void (*_add_or_remove_level)(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *, __pyx_t_7skimage_5graph_4heap_LEVELS_T);
  void (*_update)(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *);
  void (*_update_one)(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *, __pyx_t_7skimage_5graph_4heap_INDEX_T);
  void (*_remove)(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *, __pyx_t_7skimage_5graph_4heap_INDEX_T);
  __pyx_t_7skimage_5graph_4heap_INDEX_T (*push_fast)(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *, __pyx_t_7skimage_5graph_4heap_VALUE_T, __pyx_t_7skimage_5graph_4heap_REFERENCE_T);
  __pyx_t_7skimage_5graph_4heap_VALUE_T (*pop_fast)(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *);
};
static struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *__pyx_vtabptr_7skimage_5graph_4heap_BinaryHeap;


/* "skimage/graph/heap.pyx":457
 * 
 * 
 * cdef class FastUpdateBinaryHeap(BinaryHeap):             # <<<<<<<<<<<<<<
 *     """FastUpdateBinaryHeap(initial_capacity=128, max_reference=None)
 * 
 */

struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap {
  struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap __pyx_base;
  __pyx_t_7skimage_5graph_4heap_VALUE_T (*value_of_fast)(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *, __pyx_t_7skimage_5graph_4heap_REFERENCE_T);
  __pyx_t_7skimage_5graph_4heap_INDEX_T (*push_if_lower_fast)(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *, __pyx_t_7skimage_5graph_4heap_VALUE_T, __pyx_t_7skimage_5graph_4heap_REFERENCE_T);
};
static struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_vtabptr_7skimage_5graph_4heap_FastUpdateBinaryHeap;

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#define __Pyx_PyNumber_PowerOf2(a, b, c) __Pyx__PyNumber_PowerOf2(a, b, c, 0)
static PyObject* __Pyx__PyNumber_PowerOf2(PyObject *two, PyObject *exp, PyObject *none, int inplace);

/* PyUnicode_Substring.proto */
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#define __Pyx_PyThreadState_declare  PyThreadState *__pyx_tstate;
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#define __Pyx_PyErr_Occurred()  __pyx_tstate->curexc_type
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#define __Pyx_PyThreadState_declare
#define __Pyx_PyThreadState_assign
#define __Pyx_PyErr_Occurred()  PyErr_Occurred()
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#define __Pyx_PyErr_Clear() __Pyx_ErrRestore(NULL, NULL, NULL)
#define __Pyx_ErrRestoreWithState(type, value, tb)  __Pyx_ErrRestoreInState(PyThreadState_GET(), type, value, tb)
#define __Pyx_ErrFetchWithState(type, value, tb)    __Pyx_ErrFetchInState(PyThreadState_GET(), type, value, tb)
#define __Pyx_ErrRestore(type, value, tb)  __Pyx_ErrRestoreInState(__pyx_tstate, type, value, tb)
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static CYTHON_INLINE void __Pyx_ErrRestoreInState(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb);
static CYTHON_INLINE void __Pyx_ErrFetchInState(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb);
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#define __Pyx_PyErr_SetNone(exc) (Py_INCREF(exc), __Pyx_ErrRestore((exc), NULL, NULL))
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#define __Pyx_PyErr_SetNone(exc) PyErr_SetNone(exc)
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#define __Pyx_PyErr_Clear() PyErr_Clear()
#define __Pyx_PyErr_SetNone(exc) PyErr_SetNone(exc)
#define __Pyx_ErrRestoreWithState(type, value, tb)  PyErr_Restore(type, value, tb)
#define __Pyx_ErrFetchWithState(type, value, tb)  PyErr_Fetch(type, value, tb)
#define __Pyx_ErrRestoreInState(tstate, type, value, tb)  PyErr_Restore(type, value, tb)
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static void __Pyx_WriteUnraisable(const char *name, int clineno,
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static CYTHON_INLINE __pyx_t_7skimage_5graph_4heap_INDEX_T __Pyx_div___pyx_t_7skimage_5graph_4heap_INDEX_T(__pyx_t_7skimage_5graph_4heap_INDEX_T, __pyx_t_7skimage_5graph_4heap_INDEX_T);

/* None.proto */
static CYTHON_INLINE __pyx_t_7skimage_5graph_4heap_INDEX_T __Pyx_mod___pyx_t_7skimage_5graph_4heap_INDEX_T(__pyx_t_7skimage_5graph_4heap_INDEX_T, __pyx_t_7skimage_5graph_4heap_INDEX_T);

/* ListCompAppend.proto */
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static CYTHON_INLINE int __Pyx_ListComp_Append(PyObject* list, PyObject* x) {
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    Py_ssize_t len = Py_SIZE(list);
    if (likely(L->allocated > len)) {
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}
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#define __Pyx_ListComp_Append(L,x) PyList_Append(L,x)
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/* RaiseException.proto */
static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause);

/* PyObjectCall2Args.proto */
static CYTHON_UNUSED PyObject* __Pyx_PyObject_Call2Args(PyObject* function, PyObject* arg1, PyObject* arg2);

/* PyObject_GenericGetAttrNoDict.proto */
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static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name);
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#define __Pyx_PyObject_GenericGetAttrNoDict PyObject_GenericGetAttr
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/* PyObject_GenericGetAttr.proto */
#if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
static PyObject* __Pyx_PyObject_GenericGetAttr(PyObject* obj, PyObject* attr_name);
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#define __Pyx_PyObject_GenericGetAttr PyObject_GenericGetAttr
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static int __Pyx_SetVtable(PyObject *dict, void *vtable);

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static int __Pyx_setup_reduce(PyObject* type_obj);

/* PyDictVersioning.proto */
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#define __PYX_DICT_VERSION_INIT  ((PY_UINT64_T) -1)
#define __PYX_GET_DICT_VERSION(dict)  (((PyDictObject*)(dict))->ma_version_tag)
#define __PYX_UPDATE_DICT_CACHE(dict, value, cache_var, version_var)\
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static CYTHON_INLINE PY_UINT64_T __Pyx_get_tp_dict_version(PyObject *obj);
static CYTHON_INLINE PY_UINT64_T __Pyx_get_object_dict_version(PyObject *obj);
static CYTHON_INLINE int __Pyx_object_dict_version_matches(PyObject* obj, PY_UINT64_T tp_dict_version, PY_UINT64_T obj_dict_version);
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#define __PYX_UPDATE_DICT_CACHE(dict, value, cache_var, version_var)
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#define __Pyx_CLineForTraceback(tstate, c_line)  (((CYTHON_CLINE_IN_TRACEBACK)) ? c_line : 0)
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static int __Pyx_CLineForTraceback(PyThreadState *tstate, int c_line);
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static PyCodeObject *__pyx_find_code_object(int code_line);
static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object);

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static void __Pyx_AddTraceback(const char *funcname, int c_line,
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static CYTHON_INLINE long __Pyx_pow_long(long, long);

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static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value);

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static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_char(unsigned char value);

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static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *);

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static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *);

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#define __Pyx_TypeCheck(obj, type) __Pyx_IsSubtype(Py_TYPE(obj), (PyTypeObject *)type)
static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b);
static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject *type);
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static void __pyx_f_7skimage_5graph_4heap_10BinaryHeap__add_or_remove_level(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_add_or_remove); /* proto*/
static void __pyx_f_7skimage_5graph_4heap_10BinaryHeap__update(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self); /* proto*/
static void __pyx_f_7skimage_5graph_4heap_10BinaryHeap__update_one(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i); /* proto*/
static void __pyx_f_7skimage_5graph_4heap_10BinaryHeap__remove(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i1); /* proto*/
static __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_10BinaryHeap_push_fast(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference); /* proto*/
static __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_f_7skimage_5graph_4heap_10BinaryHeap_pop_fast(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self); /* proto*/
static void __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap__remove(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i1); /* proto*/
static __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap_push_fast(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference); /* proto*/
static __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap_push_if_lower_fast(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference); /* proto*/
static __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap_value_of_fast(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference); /* proto*/

/* Module declarations from 'cython' */

/* Module declarations from 'libc.string' */

/* Module declarations from 'libc.stdlib' */

/* Module declarations from 'skimage.graph.heap' */
static PyTypeObject *__pyx_ptype_7skimage_5graph_4heap_BinaryHeap = 0;
static PyTypeObject *__pyx_ptype_7skimage_5graph_4heap_FastUpdateBinaryHeap = 0;
static __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_7skimage_5graph_4heap_inf;
static CYTHON_INLINE __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_index_min(__pyx_t_7skimage_5graph_4heap_INDEX_T, __pyx_t_7skimage_5graph_4heap_INDEX_T); /*proto*/
#define __Pyx_MODULE_NAME "skimage.graph.heap"
extern int __pyx_module_is_main_skimage__graph__heap;
int __pyx_module_is_main_skimage__graph__heap = 0;

/* Implementation of 'skimage.graph.heap' */
static PyObject *__pyx_builtin_MemoryError;
static PyObject *__pyx_builtin_range;
static PyObject *__pyx_builtin_IndexError;
static PyObject *__pyx_builtin_TypeError;
static PyObject *__pyx_builtin_ValueError;
static const char __pyx_k_[] = "";
static const char __pyx_k_g[] = "%g, ";
static const char __pyx_k__2[] = "\n";
static const char __pyx_k_init[] = "__init__";
static const char __pyx_k_main[] = "__main__";
static const char __pyx_k_name[] = "__name__";
static const char __pyx_k_test[] = "__test__";
static const char __pyx_k_range[] = "range";
static const char __pyx_k_reset[] = "reset";
static const char __pyx_k_value[] = "value";
static const char __pyx_k_reduce[] = "__reduce__";
static const char __pyx_k_level_i[] = "level %i: ";
static const char __pyx_k_getstate[] = "__getstate__";
static const char __pyx_k_setstate[] = "__setstate__";
static const char __pyx_k_TypeError[] = "TypeError";
static const char __pyx_k_reduce_ex[] = "__reduce_ex__";
static const char __pyx_k_reference[] = "reference";
static const char __pyx_k_BinaryHeap[] = "BinaryHeap";
static const char __pyx_k_IndexError[] = "IndexError";
static const char __pyx_k_ValueError[] = "ValueError";
static const char __pyx_k_pyx_vtable[] = "__pyx_vtable__";
static const char __pyx_k_MemoryError[] = "MemoryError";
static const char __pyx_k_max_reference[] = "max_reference";
static const char __pyx_k_reduce_cython[] = "__reduce_cython__";
static const char __pyx_k_setstate_cython[] = "__setstate_cython__";
static const char __pyx_k_initial_capacity[] = "initial_capacity";
static const char __pyx_k_invalid_reference[] = "invalid reference";
static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
static const char __pyx_k_FastUpdateBinaryHeap[] = "FastUpdateBinaryHeap";
static const char __pyx_k_pop_from_an_empty_heap[] = "pop from an empty heap";
static const char __pyx_k_Cython_implementation_of_a_binar[] = "Cython implementation of a binary min heap.\n\nOriginal author: Almar Klein\nModified by: Zachary Pincus\n\nLicense: BSD\n\nCopyright 2009 Almar Klein\n\nRedistribution and use in source and binary forms, with or without\nmodification, are permitted provided that the following conditions\nare met:\n\n1. Redistributions of source code must retain the above copyright\n   notice, this list of conditions and the following disclaimer.\n2. Redistributions in binary form must reproduce the above copyright\n   notice, this list of conditions and the following disclaimer in the\n   documentation and/or other materials provided with the distribution.\n\nTHIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\nIMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\nOF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\nIN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\nINCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT\nNOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\nDATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\nTHEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF\nTHIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n";
static const char __pyx_k_no_default___reduce___due_to_non[] = "no default __reduce__ due to non-trivial __cinit__";
static const char __pyx_k_reference_outside_of_range_0_max[] = "reference outside of range [0, max_reference]";
static PyObject *__pyx_kp_u_;
static PyObject *__pyx_n_s_BinaryHeap;
static PyObject *__pyx_n_s_FastUpdateBinaryHeap;
static PyObject *__pyx_n_s_IndexError;
static PyObject *__pyx_n_s_MemoryError;
static PyObject *__pyx_n_s_TypeError;
static PyObject *__pyx_n_s_ValueError;
static PyObject *__pyx_kp_u__2;
static PyObject *__pyx_n_s_cline_in_traceback;
static PyObject *__pyx_kp_u_g;
static PyObject *__pyx_n_s_getstate;
static PyObject *__pyx_n_s_init;
static PyObject *__pyx_n_s_initial_capacity;
static PyObject *__pyx_kp_u_invalid_reference;
static PyObject *__pyx_kp_u_level_i;
static PyObject *__pyx_n_s_main;
static PyObject *__pyx_n_s_max_reference;
static PyObject *__pyx_n_s_name;
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static PyObject *__pyx_kp_u_pop_from_an_empty_heap;
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 *             for i in range(i0, i0+n, 2):
 *                 ii = (i-1) // 2  # CalcPrevAbs
 *                 if values[i] < values[i+1]:             # <<<<<<<<<<<<<<
 *                     values[ii] = values[i]
 *                 else:
 */
      __pyx_t_6 = (((__pyx_v_values[__pyx_v_i]) < (__pyx_v_values[(__pyx_v_i + 1)])) != 0);
      if (__pyx_t_6) {

        /* "skimage/graph/heap.pyx":255
 *                 ii = (i-1) // 2  # CalcPrevAbs
 *                 if values[i] < values[i+1]:
 *                     values[ii] = values[i]             # <<<<<<<<<<<<<<
 *                 else:
 *                     values[ii] = values[i+1]
 */
        (__pyx_v_values[__pyx_v_ii]) = (__pyx_v_values[__pyx_v_i]);

        /* "skimage/graph/heap.pyx":254
 *             for i in range(i0, i0+n, 2):
 *                 ii = (i-1) // 2  # CalcPrevAbs
 *                 if values[i] < values[i+1]:             # <<<<<<<<<<<<<<
 *                     values[ii] = values[i]
 *                 else:
 */
        goto __pyx_L7;
      }

      /* "skimage/graph/heap.pyx":257
 *                     values[ii] = values[i]
 *                 else:
 *                     values[ii] = values[i+1]             # <<<<<<<<<<<<<<
 * 
 *     cdef void _update_one(self, INDEX_T i) nogil:
 */
      /*else*/ {
        (__pyx_v_values[__pyx_v_ii]) = (__pyx_v_values[(__pyx_v_i + 1)]);
      }
      __pyx_L7:;
    }
  }

  /* "skimage/graph/heap.pyx":235
 *         self._update()
 * 
 *     cdef void _update(self) nogil:             # <<<<<<<<<<<<<<
 *         """Update the full tree from the bottom up.
 * 
 */

  /* function exit code */
}

/* "skimage/graph/heap.pyx":259
 *                     values[ii] = values[i+1]
 * 
 *     cdef void _update_one(self, INDEX_T i) nogil:             # <<<<<<<<<<<<<<
 *         """Update the tree for one value."""
 *         # shorter name for values
 */

static void __pyx_f_7skimage_5graph_4heap_10BinaryHeap__update_one(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i) {
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_v_values;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_ii;
  CYTHON_UNUSED __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_level;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_t_1;
  int __pyx_t_2;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_t_3;

  /* "skimage/graph/heap.pyx":262
 *         """Update the tree for one value."""
 *         # shorter name for values
 *         cdef VALUE_T *values = self._values             # <<<<<<<<<<<<<<
 * 
 *         # make index uneven
 */
  __pyx_t_1 = __pyx_v_self->_values;
  __pyx_v_values = __pyx_t_1;

  /* "skimage/graph/heap.pyx":265
 * 
 *         # make index uneven
 *         if i % 2 == 0:             # <<<<<<<<<<<<<<
 *             i -= 1
 * 
 */
  __pyx_t_2 = ((__Pyx_mod___pyx_t_7skimage_5graph_4heap_INDEX_T(__pyx_v_i, 2) == 0) != 0);
  if (__pyx_t_2) {

    /* "skimage/graph/heap.pyx":266
 *         # make index uneven
 *         if i % 2 == 0:
 *             i -= 1             # <<<<<<<<<<<<<<
 * 
 *         # track tree
 */
    __pyx_v_i = (__pyx_v_i - 1);

    /* "skimage/graph/heap.pyx":265
 * 
 *         # make index uneven
 *         if i % 2 == 0:             # <<<<<<<<<<<<<<
 *             i -= 1
 * 
 */
  }

  /* "skimage/graph/heap.pyx":271
 *         cdef INDEX_T ii
 *         cdef LEVELS_T level
 *         for level in range(self.levels, 1, -1):             # <<<<<<<<<<<<<<
 *             ii = (i-1) // 2  # CalcPrevAbs
 * 
 */
  for (__pyx_t_3 = __pyx_v_self->levels + 1; __pyx_t_3 > 1 + 1; ) { __pyx_t_3-=1;
    __pyx_v_level = __pyx_t_3;

    /* "skimage/graph/heap.pyx":272
 *         cdef LEVELS_T level
 *         for level in range(self.levels, 1, -1):
 *             ii = (i-1) // 2  # CalcPrevAbs             # <<<<<<<<<<<<<<
 * 
 *             # test
 */
    __pyx_v_ii = __Pyx_div___pyx_t_7skimage_5graph_4heap_INDEX_T((__pyx_v_i - 1), 2);

    /* "skimage/graph/heap.pyx":275
 * 
 *             # test
 *             if values[i] < values[i+1]:             # <<<<<<<<<<<<<<
 *                 values[ii] = values[i]
 *             else:
 */
    __pyx_t_2 = (((__pyx_v_values[__pyx_v_i]) < (__pyx_v_values[(__pyx_v_i + 1)])) != 0);
    if (__pyx_t_2) {

      /* "skimage/graph/heap.pyx":276
 *             # test
 *             if values[i] < values[i+1]:
 *                 values[ii] = values[i]             # <<<<<<<<<<<<<<
 *             else:
 *                 values[ii] = values[i+1]
 */
      (__pyx_v_values[__pyx_v_ii]) = (__pyx_v_values[__pyx_v_i]);

      /* "skimage/graph/heap.pyx":275
 * 
 *             # test
 *             if values[i] < values[i+1]:             # <<<<<<<<<<<<<<
 *                 values[ii] = values[i]
 *             else:
 */
      goto __pyx_L6;
    }

    /* "skimage/graph/heap.pyx":278
 *                 values[ii] = values[i]
 *             else:
 *                 values[ii] = values[i+1]             # <<<<<<<<<<<<<<
 *             # next
 *             if ii % 2:
 */
    /*else*/ {
      (__pyx_v_values[__pyx_v_ii]) = (__pyx_v_values[(__pyx_v_i + 1)]);
    }
    __pyx_L6:;

    /* "skimage/graph/heap.pyx":280
 *                 values[ii] = values[i+1]
 *             # next
 *             if ii % 2:             # <<<<<<<<<<<<<<
 *                 i = ii
 *             else:
 */
    __pyx_t_2 = (__Pyx_mod___pyx_t_7skimage_5graph_4heap_INDEX_T(__pyx_v_ii, 2) != 0);
    if (__pyx_t_2) {

      /* "skimage/graph/heap.pyx":281
 *             # next
 *             if ii % 2:
 *                 i = ii             # <<<<<<<<<<<<<<
 *             else:
 *                 i = ii - 1
 */
      __pyx_v_i = __pyx_v_ii;

      /* "skimage/graph/heap.pyx":280
 *                 values[ii] = values[i+1]
 *             # next
 *             if ii % 2:             # <<<<<<<<<<<<<<
 *                 i = ii
 *             else:
 */
      goto __pyx_L7;
    }

    /* "skimage/graph/heap.pyx":283
 *                 i = ii
 *             else:
 *                 i = ii - 1             # <<<<<<<<<<<<<<
 * 
 *     cdef void _remove(self, INDEX_T i1) nogil:
 */
    /*else*/ {
      __pyx_v_i = (__pyx_v_ii - 1);
    }
    __pyx_L7:;
  }

  /* "skimage/graph/heap.pyx":259
 *                     values[ii] = values[i+1]
 * 
 *     cdef void _update_one(self, INDEX_T i) nogil:             # <<<<<<<<<<<<<<
 *         """Update the tree for one value."""
 *         # shorter name for values
 */

  /* function exit code */
}

/* "skimage/graph/heap.pyx":285
 *                 i = ii - 1
 * 
 *     cdef void _remove(self, INDEX_T i1) nogil:             # <<<<<<<<<<<<<<
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels
 */

static void __pyx_f_7skimage_5graph_4heap_10BinaryHeap__remove(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i1) {
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_levels;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_count;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i0;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i2;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_r1;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_r2;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_v_values;
  __pyx_t_7skimage_5graph_4heap_REFERENCE_T *__pyx_v_references;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_t_1;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_t_2;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_t_3;
  __pyx_t_7skimage_5graph_4heap_REFERENCE_T *__pyx_t_4;
  int __pyx_t_5;
  int __pyx_t_6;

  /* "skimage/graph/heap.pyx":287
 *     cdef void _remove(self, INDEX_T i1) nogil:
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels             # <<<<<<<<<<<<<<
 *         cdef INDEX_T count = self.count
 *         # get indices
 */
  __pyx_t_1 = __pyx_v_self->levels;
  __pyx_v_levels = __pyx_t_1;

  /* "skimage/graph/heap.pyx":288
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels
 *         cdef INDEX_T count = self.count             # <<<<<<<<<<<<<<
 *         # get indices
 *         cdef INDEX_T i0 = (1 << levels) - 1  # 2**self.levels - 1 # LevelStart
 */
  __pyx_t_2 = __pyx_v_self->count;
  __pyx_v_count = __pyx_t_2;

  /* "skimage/graph/heap.pyx":290
 *         cdef INDEX_T count = self.count
 *         # get indices
 *         cdef INDEX_T i0 = (1 << levels) - 1  # 2**self.levels - 1 # LevelStart             # <<<<<<<<<<<<<<
 *         cdef INDEX_T i2 = i0 + count - 1
 * 
 */
  __pyx_v_i0 = ((1 << __pyx_v_levels) - 1);

  /* "skimage/graph/heap.pyx":291
 *         # get indices
 *         cdef INDEX_T i0 = (1 << levels) - 1  # 2**self.levels - 1 # LevelStart
 *         cdef INDEX_T i2 = i0 + count - 1             # <<<<<<<<<<<<<<
 * 
 *         # get relative indices
 */
  __pyx_v_i2 = ((__pyx_v_i0 + __pyx_v_count) - 1);

  /* "skimage/graph/heap.pyx":294
 * 
 *         # get relative indices
 *         cdef INDEX_T r1 = i1 - i0             # <<<<<<<<<<<<<<
 *         cdef INDEX_T r2 = count - 1
 * 
 */
  __pyx_v_r1 = (__pyx_v_i1 - __pyx_v_i0);

  /* "skimage/graph/heap.pyx":295
 *         # get relative indices
 *         cdef INDEX_T r1 = i1 - i0
 *         cdef INDEX_T r2 = count - 1             # <<<<<<<<<<<<<<
 * 
 *         cdef VALUE_T *values = self._values
 */
  __pyx_v_r2 = (__pyx_v_count - 1);

  /* "skimage/graph/heap.pyx":297
 *         cdef INDEX_T r2 = count - 1
 * 
 *         cdef VALUE_T *values = self._values             # <<<<<<<<<<<<<<
 *         cdef REFERENCE_T *references = self._references
 * 
 */
  __pyx_t_3 = __pyx_v_self->_values;
  __pyx_v_values = __pyx_t_3;

  /* "skimage/graph/heap.pyx":298
 * 
 *         cdef VALUE_T *values = self._values
 *         cdef REFERENCE_T *references = self._references             # <<<<<<<<<<<<<<
 * 
 *         # swap with last
 */
  __pyx_t_4 = __pyx_v_self->_references;
  __pyx_v_references = __pyx_t_4;

  /* "skimage/graph/heap.pyx":301
 * 
 *         # swap with last
 *         values[i1] = values[i2]             # <<<<<<<<<<<<<<
 *         references[r1] = references[r2]
 * 
 */
  (__pyx_v_values[__pyx_v_i1]) = (__pyx_v_values[__pyx_v_i2]);

  /* "skimage/graph/heap.pyx":302
 *         # swap with last
 *         values[i1] = values[i2]
 *         references[r1] = references[r2]             # <<<<<<<<<<<<<<
 * 
 *         # make last Null
 */
  (__pyx_v_references[__pyx_v_r1]) = (__pyx_v_references[__pyx_v_r2]);

  /* "skimage/graph/heap.pyx":305
 * 
 *         # make last Null
 *         values[i2] = inf             # <<<<<<<<<<<<<<
 * 
 *         # update
 */
  (__pyx_v_values[__pyx_v_i2]) = __pyx_v_7skimage_5graph_4heap_inf;

  /* "skimage/graph/heap.pyx":308
 * 
 *         # update
 *         self.count -= 1             # <<<<<<<<<<<<<<
 *         count -= 1
 *         if (levels > self.min_levels) and (count < (1 << (levels-2))):
 */
  __pyx_v_self->count = (__pyx_v_self->count - 1);

  /* "skimage/graph/heap.pyx":309
 *         # update
 *         self.count -= 1
 *         count -= 1             # <<<<<<<<<<<<<<
 *         if (levels > self.min_levels) and (count < (1 << (levels-2))):
 *             self._add_or_remove_level(-1)
 */
  __pyx_v_count = (__pyx_v_count - 1);

  /* "skimage/graph/heap.pyx":310
 *         self.count -= 1
 *         count -= 1
 *         if (levels > self.min_levels) and (count < (1 << (levels-2))):             # <<<<<<<<<<<<<<
 *             self._add_or_remove_level(-1)
 *         else:
 */
  __pyx_t_6 = ((__pyx_v_levels > __pyx_v_self->min_levels) != 0);
  if (__pyx_t_6) {
  } else {
    __pyx_t_5 = __pyx_t_6;
    goto __pyx_L4_bool_binop_done;
  }
  __pyx_t_6 = ((__pyx_v_count < (1 << (__pyx_v_levels - 2))) != 0);
  __pyx_t_5 = __pyx_t_6;
  __pyx_L4_bool_binop_done:;
  if (__pyx_t_5) {

    /* "skimage/graph/heap.pyx":311
 *         count -= 1
 *         if (levels > self.min_levels) and (count < (1 << (levels-2))):
 *             self._add_or_remove_level(-1)             # <<<<<<<<<<<<<<
 *         else:
 *             self._update_one(i1)
 */
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self->__pyx_vtab)->_add_or_remove_level(__pyx_v_self, -1);

    /* "skimage/graph/heap.pyx":310
 *         self.count -= 1
 *         count -= 1
 *         if (levels > self.min_levels) and (count < (1 << (levels-2))):             # <<<<<<<<<<<<<<
 *             self._add_or_remove_level(-1)
 *         else:
 */
    goto __pyx_L3;
  }

  /* "skimage/graph/heap.pyx":313
 *             self._add_or_remove_level(-1)
 *         else:
 *             self._update_one(i1)             # <<<<<<<<<<<<<<
 *             self._update_one(i2)
 * 
 */
  /*else*/ {
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self->__pyx_vtab)->_update_one(__pyx_v_self, __pyx_v_i1);

    /* "skimage/graph/heap.pyx":314
 *         else:
 *             self._update_one(i1)
 *             self._update_one(i2)             # <<<<<<<<<<<<<<
 * 
 *     ## C Public methods
 */
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self->__pyx_vtab)->_update_one(__pyx_v_self, __pyx_v_i2);
  }
  __pyx_L3:;

  /* "skimage/graph/heap.pyx":285
 *                 i = ii - 1
 * 
 *     cdef void _remove(self, INDEX_T i1) nogil:             # <<<<<<<<<<<<<<
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels
 */

  /* function exit code */
}

/* "skimage/graph/heap.pyx":318
 *     ## C Public methods
 * 
 *     cdef INDEX_T push_fast(self, VALUE_T value, REFERENCE_T reference) nogil:             # <<<<<<<<<<<<<<
 *         """The c-method for fast pushing.
 * 
 */

static __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_10BinaryHeap_push_fast(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference) {
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_levels;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_count;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_r;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_t_1;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_t_2;
  int __pyx_t_3;

  /* "skimage/graph/heap.pyx":325
 *         """
 *         # We need to resize if currently it just fits.
 *         cdef LEVELS_T levels = self.levels             # <<<<<<<<<<<<<<
 *         cdef INDEX_T count = self.count
 *         if count >= (1 << levels):  # 2**self.levels:
 */
  __pyx_t_1 = __pyx_v_self->levels;
  __pyx_v_levels = __pyx_t_1;

  /* "skimage/graph/heap.pyx":326
 *         # We need to resize if currently it just fits.
 *         cdef LEVELS_T levels = self.levels
 *         cdef INDEX_T count = self.count             # <<<<<<<<<<<<<<
 *         if count >= (1 << levels):  # 2**self.levels:
 *             self._add_or_remove_level(1)
 */
  __pyx_t_2 = __pyx_v_self->count;
  __pyx_v_count = __pyx_t_2;

  /* "skimage/graph/heap.pyx":327
 *         cdef LEVELS_T levels = self.levels
 *         cdef INDEX_T count = self.count
 *         if count >= (1 << levels):  # 2**self.levels:             # <<<<<<<<<<<<<<
 *             self._add_or_remove_level(1)
 *             levels += 1
 */
  __pyx_t_3 = ((__pyx_v_count >= (1 << __pyx_v_levels)) != 0);
  if (__pyx_t_3) {

    /* "skimage/graph/heap.pyx":328
 *         cdef INDEX_T count = self.count
 *         if count >= (1 << levels):  # 2**self.levels:
 *             self._add_or_remove_level(1)             # <<<<<<<<<<<<<<
 *             levels += 1
 * 
 */
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self->__pyx_vtab)->_add_or_remove_level(__pyx_v_self, 1);

    /* "skimage/graph/heap.pyx":329
 *         if count >= (1 << levels):  # 2**self.levels:
 *             self._add_or_remove_level(1)
 *             levels += 1             # <<<<<<<<<<<<<<
 * 
 *         # insert new value
 */
    __pyx_v_levels = (__pyx_v_levels + 1);

    /* "skimage/graph/heap.pyx":327
 *         cdef LEVELS_T levels = self.levels
 *         cdef INDEX_T count = self.count
 *         if count >= (1 << levels):  # 2**self.levels:             # <<<<<<<<<<<<<<
 *             self._add_or_remove_level(1)
 *             levels += 1
 */
  }

  /* "skimage/graph/heap.pyx":332
 * 
 *         # insert new value
 *         cdef INDEX_T i = ((1 << levels) - 1) + count  # LevelStart + n             # <<<<<<<<<<<<<<
 *         self._values[i] = value
 *         self._references[count] = reference
 */
  __pyx_v_i = (((1 << __pyx_v_levels) - 1) + __pyx_v_count);

  /* "skimage/graph/heap.pyx":333
 *         # insert new value
 *         cdef INDEX_T i = ((1 << levels) - 1) + count  # LevelStart + n
 *         self._values[i] = value             # <<<<<<<<<<<<<<
 *         self._references[count] = reference
 * 
 */
  (__pyx_v_self->_values[__pyx_v_i]) = __pyx_v_value;

  /* "skimage/graph/heap.pyx":334
 *         cdef INDEX_T i = ((1 << levels) - 1) + count  # LevelStart + n
 *         self._values[i] = value
 *         self._references[count] = reference             # <<<<<<<<<<<<<<
 * 
 *         # update
 */
  (__pyx_v_self->_references[__pyx_v_count]) = __pyx_v_reference;

  /* "skimage/graph/heap.pyx":337
 * 
 *         # update
 *         self.count += 1             # <<<<<<<<<<<<<<
 *         self._update_one(i)
 * 
 */
  __pyx_v_self->count = (__pyx_v_self->count + 1);

  /* "skimage/graph/heap.pyx":338
 *         # update
 *         self.count += 1
 *         self._update_one(i)             # <<<<<<<<<<<<<<
 * 
 *         # return
 */
  ((struct __pyx_vtabstruct_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self->__pyx_vtab)->_update_one(__pyx_v_self, __pyx_v_i);

  /* "skimage/graph/heap.pyx":341
 * 
 *         # return
 *         return count             # <<<<<<<<<<<<<<
 * 
 *     cdef VALUE_T pop_fast(self) nogil:
 */
  __pyx_r = __pyx_v_count;
  goto __pyx_L0;

  /* "skimage/graph/heap.pyx":318
 *     ## C Public methods
 * 
 *     cdef INDEX_T push_fast(self, VALUE_T value, REFERENCE_T reference) nogil:             # <<<<<<<<<<<<<<
 *         """The c-method for fast pushing.
 * 
 */

  /* function exit code */
  __pyx_L0:;
  return __pyx_r;
}

/* "skimage/graph/heap.pyx":343
 *         return count
 * 
 *     cdef VALUE_T pop_fast(self) nogil:             # <<<<<<<<<<<<<<
 *         """The c-method for fast popping.
 * 
 */

static __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_f_7skimage_5graph_4heap_10BinaryHeap_pop_fast(struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *__pyx_v_self) {
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_v_values;
  CYTHON_UNUSED __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_level;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_levels;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_ir;
  __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value;
  __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_r;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_t_1;
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 *             self._crossref[i] = -1
 * 
 *     cdef void _remove(self, INDEX_T i1) nogil:             # <<<<<<<<<<<<<<
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels
 */

static void __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap__remove(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i1) {
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_v_levels;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_count;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i0;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i2;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_r1;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_r2;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_v_values;
  __pyx_t_7skimage_5graph_4heap_REFERENCE_T *__pyx_v_references;
  __pyx_t_7skimage_5graph_4heap_INDEX_T *__pyx_v_crossref;
  __pyx_t_7skimage_5graph_4heap_LEVELS_T __pyx_t_1;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_t_2;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_t_3;
  __pyx_t_7skimage_5graph_4heap_REFERENCE_T *__pyx_t_4;
  __pyx_t_7skimage_5graph_4heap_INDEX_T *__pyx_t_5;
  int __pyx_t_6;

  /* "skimage/graph/heap.pyx":546
 *     cdef void _remove(self, INDEX_T i1) nogil:
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels             # <<<<<<<<<<<<<<
 *         cdef INDEX_T count = self.count
 * 
 */
  __pyx_t_1 = __pyx_v_self->__pyx_base.levels;
  __pyx_v_levels = __pyx_t_1;

  /* "skimage/graph/heap.pyx":547
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels
 *         cdef INDEX_T count = self.count             # <<<<<<<<<<<<<<
 * 
 *         # get indices
 */
  __pyx_t_2 = __pyx_v_self->__pyx_base.count;
  __pyx_v_count = __pyx_t_2;

  /* "skimage/graph/heap.pyx":550
 * 
 *         # get indices
 *         cdef INDEX_T i0 = (1 << levels) - 1  # 2**self.levels - 1 # LevelStart             # <<<<<<<<<<<<<<
 *         cdef INDEX_T i2 = i0 + count - 1
 * 
 */
  __pyx_v_i0 = ((1 << __pyx_v_levels) - 1);

  /* "skimage/graph/heap.pyx":551
 *         # get indices
 *         cdef INDEX_T i0 = (1 << levels) - 1  # 2**self.levels - 1 # LevelStart
 *         cdef INDEX_T i2 = i0 + count - 1             # <<<<<<<<<<<<<<
 * 
 *         # get relative indices
 */
  __pyx_v_i2 = ((__pyx_v_i0 + __pyx_v_count) - 1);

  /* "skimage/graph/heap.pyx":554
 * 
 *         # get relative indices
 *         cdef INDEX_T r1 = i1 - i0             # <<<<<<<<<<<<<<
 *         cdef INDEX_T r2 = count - 1
 * 
 */
  __pyx_v_r1 = (__pyx_v_i1 - __pyx_v_i0);

  /* "skimage/graph/heap.pyx":555
 *         # get relative indices
 *         cdef INDEX_T r1 = i1 - i0
 *         cdef INDEX_T r2 = count - 1             # <<<<<<<<<<<<<<
 * 
 *         cdef VALUE_T *values = self._values
 */
  __pyx_v_r2 = (__pyx_v_count - 1);

  /* "skimage/graph/heap.pyx":557
 *         cdef INDEX_T r2 = count - 1
 * 
 *         cdef VALUE_T *values = self._values             # <<<<<<<<<<<<<<
 *         cdef REFERENCE_T *references = self._references
 *         cdef INDEX_T *crossref = self._crossref
 */
  __pyx_t_3 = __pyx_v_self->__pyx_base._values;
  __pyx_v_values = __pyx_t_3;

  /* "skimage/graph/heap.pyx":558
 * 
 *         cdef VALUE_T *values = self._values
 *         cdef REFERENCE_T *references = self._references             # <<<<<<<<<<<<<<
 *         cdef INDEX_T *crossref = self._crossref
 * 
 */
  __pyx_t_4 = __pyx_v_self->__pyx_base._references;
  __pyx_v_references = __pyx_t_4;

  /* "skimage/graph/heap.pyx":559
 *         cdef VALUE_T *values = self._values
 *         cdef REFERENCE_T *references = self._references
 *         cdef INDEX_T *crossref = self._crossref             # <<<<<<<<<<<<<<
 * 
 *         # update cross reference
 */
  __pyx_t_5 = __pyx_v_self->_crossref;
  __pyx_v_crossref = __pyx_t_5;

  /* "skimage/graph/heap.pyx":562
 * 
 *         # update cross reference
 *         crossref[references[r2]] = r1             # <<<<<<<<<<<<<<
 *         crossref[references[r1]] = -1  # disable removed item
 * 
 */
  (__pyx_v_crossref[(__pyx_v_references[__pyx_v_r2])]) = __pyx_v_r1;

  /* "skimage/graph/heap.pyx":563
 *         # update cross reference
 *         crossref[references[r2]] = r1
 *         crossref[references[r1]] = -1  # disable removed item             # <<<<<<<<<<<<<<
 * 
 *         # swap with last
 */
  (__pyx_v_crossref[(__pyx_v_references[__pyx_v_r1])]) = -1L;

  /* "skimage/graph/heap.pyx":566
 * 
 *         # swap with last
 *         values[i1] = values[i2]             # <<<<<<<<<<<<<<
 *         references[r1] = references[r2]
 * 
 */
  (__pyx_v_values[__pyx_v_i1]) = (__pyx_v_values[__pyx_v_i2]);

  /* "skimage/graph/heap.pyx":567
 *         # swap with last
 *         values[i1] = values[i2]
 *         references[r1] = references[r2]             # <<<<<<<<<<<<<<
 * 
 *         # make last Null
 */
  (__pyx_v_references[__pyx_v_r1]) = (__pyx_v_references[__pyx_v_r2]);

  /* "skimage/graph/heap.pyx":570
 * 
 *         # make last Null
 *         values[i2] = inf             # <<<<<<<<<<<<<<
 * 
 *         # update
 */
  (__pyx_v_values[__pyx_v_i2]) = __pyx_v_7skimage_5graph_4heap_inf;

  /* "skimage/graph/heap.pyx":573
 * 
 *         # update
 *         self.count -= 1             # <<<<<<<<<<<<<<
 *         count -= 1
 *         if (levels > self.min_levels) & (count < (1 << (levels-2))):
 */
  __pyx_v_self->__pyx_base.count = (__pyx_v_self->__pyx_base.count - 1);

  /* "skimage/graph/heap.pyx":574
 *         # update
 *         self.count -= 1
 *         count -= 1             # <<<<<<<<<<<<<<
 *         if (levels > self.min_levels) & (count < (1 << (levels-2))):
 *             self._add_or_remove_level(-1)
 */
  __pyx_v_count = (__pyx_v_count - 1);

  /* "skimage/graph/heap.pyx":575
 *         self.count -= 1
 *         count -= 1
 *         if (levels > self.min_levels) & (count < (1 << (levels-2))):             # <<<<<<<<<<<<<<
 *             self._add_or_remove_level(-1)
 *         else:
 */
  __pyx_t_6 = (((__pyx_v_levels > __pyx_v_self->__pyx_base.min_levels) & (__pyx_v_count < (1 << (__pyx_v_levels - 2)))) != 0);
  if (__pyx_t_6) {

    /* "skimage/graph/heap.pyx":576
 *         count -= 1
 *         if (levels > self.min_levels) & (count < (1 << (levels-2))):
 *             self._add_or_remove_level(-1)             # <<<<<<<<<<<<<<
 *         else:
 *             self._update_one(i1)
 */
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._add_or_remove_level(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), -1);

    /* "skimage/graph/heap.pyx":575
 *         self.count -= 1
 *         count -= 1
 *         if (levels > self.min_levels) & (count < (1 << (levels-2))):             # <<<<<<<<<<<<<<
 *             self._add_or_remove_level(-1)
 *         else:
 */
    goto __pyx_L3;
  }

  /* "skimage/graph/heap.pyx":578
 *             self._add_or_remove_level(-1)
 *         else:
 *             self._update_one(i1)             # <<<<<<<<<<<<<<
 *             self._update_one(i2)
 * 
 */
  /*else*/ {
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._update_one(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), __pyx_v_i1);

    /* "skimage/graph/heap.pyx":579
 *         else:
 *             self._update_one(i1)
 *             self._update_one(i2)             # <<<<<<<<<<<<<<
 * 
 *     cdef INDEX_T push_fast(self, VALUE_T value, REFERENCE_T reference) nogil:
 */
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._update_one(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), __pyx_v_i2);
  }
  __pyx_L3:;

  /* "skimage/graph/heap.pyx":544
 *             self._crossref[i] = -1
 * 
 *     cdef void _remove(self, INDEX_T i1) nogil:             # <<<<<<<<<<<<<<
 *         """Remove a value from the heap. By index."""
 *         cdef LEVELS_T levels = self.levels
 */

  /* function exit code */
}

/* "skimage/graph/heap.pyx":581
 *             self._update_one(i2)
 * 
 *     cdef INDEX_T push_fast(self, VALUE_T value, REFERENCE_T reference) nogil:             # <<<<<<<<<<<<<<
 *         """The c method for fast pushing.
 * 
 */

static __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap_push_fast(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference) {
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_ir;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_r;
  int __pyx_t_1;
  int __pyx_t_2;

  /* "skimage/graph/heap.pyx":591
 * 
 *         """
 *         if not (0 <= reference <= self.max_reference):             # <<<<<<<<<<<<<<
 *             return -1
 * 
 */
  __pyx_t_1 = (0 <= __pyx_v_reference);
  if (__pyx_t_1) {
    __pyx_t_1 = (__pyx_v_reference <= __pyx_v_self->max_reference);
  }
  __pyx_t_2 = ((!(__pyx_t_1 != 0)) != 0);
  if (__pyx_t_2) {

    /* "skimage/graph/heap.pyx":592
 *         """
 *         if not (0 <= reference <= self.max_reference):
 *             return -1             # <<<<<<<<<<<<<<
 * 
 *         # init variable to store the index-in-the-heap
 */
    __pyx_r = -1L;
    goto __pyx_L0;

    /* "skimage/graph/heap.pyx":591
 * 
 *         """
 *         if not (0 <= reference <= self.max_reference):             # <<<<<<<<<<<<<<
 *             return -1
 * 
 */
  }

  /* "skimage/graph/heap.pyx":599
 *         # Reference is the index in the array where MCP is applied to.
 *         # Find the index-in-the-heap using the crossref array.
 *         cdef INDEX_T ir = self._crossref[reference]             # <<<<<<<<<<<<<<
 * 
 *         if ir != -1:
 */
  __pyx_v_ir = (__pyx_v_self->_crossref[__pyx_v_reference]);

  /* "skimage/graph/heap.pyx":601
 *         cdef INDEX_T ir = self._crossref[reference]
 * 
 *         if ir != -1:             # <<<<<<<<<<<<<<
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 */
  __pyx_t_2 = ((__pyx_v_ir != -1L) != 0);
  if (__pyx_t_2) {

    /* "skimage/graph/heap.pyx":603
 *         if ir != -1:
 *             # update
 *             i = (1 << self.levels) - 1 + ir             # <<<<<<<<<<<<<<
 *             self._values[i] = value
 *             self._update_one(i)
 */
    __pyx_v_i = (((1 << __pyx_v_self->__pyx_base.levels) - 1) + __pyx_v_ir);

    /* "skimage/graph/heap.pyx":604
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 *             self._values[i] = value             # <<<<<<<<<<<<<<
 *             self._update_one(i)
 *             return ir
 */
    (__pyx_v_self->__pyx_base._values[__pyx_v_i]) = __pyx_v_value;

    /* "skimage/graph/heap.pyx":605
 *             i = (1 << self.levels) - 1 + ir
 *             self._values[i] = value
 *             self._update_one(i)             # <<<<<<<<<<<<<<
 *             return ir
 * 
 */
    ((struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._update_one(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), __pyx_v_i);

    /* "skimage/graph/heap.pyx":606
 *             self._values[i] = value
 *             self._update_one(i)
 *             return ir             # <<<<<<<<<<<<<<
 * 
 *         # if not updated: append normally and store reference
 */
    __pyx_r = __pyx_v_ir;
    goto __pyx_L0;

    /* "skimage/graph/heap.pyx":601
 *         cdef INDEX_T ir = self._crossref[reference]
 * 
 *         if ir != -1:             # <<<<<<<<<<<<<<
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 */
  }

  /* "skimage/graph/heap.pyx":609
 * 
 *         # if not updated: append normally and store reference
 *         ir = BinaryHeap.push_fast(self, value, reference)             # <<<<<<<<<<<<<<
 *         self._crossref[reference] = ir
 *         return ir
 */
  __pyx_v_ir = __pyx_f_7skimage_5graph_4heap_10BinaryHeap_push_fast(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), __pyx_v_value, __pyx_v_reference);

  /* "skimage/graph/heap.pyx":610
 *         # if not updated: append normally and store reference
 *         ir = BinaryHeap.push_fast(self, value, reference)
 *         self._crossref[reference] = ir             # <<<<<<<<<<<<<<
 *         return ir
 * 
 */
  (__pyx_v_self->_crossref[__pyx_v_reference]) = __pyx_v_ir;

  /* "skimage/graph/heap.pyx":611
 *         ir = BinaryHeap.push_fast(self, value, reference)
 *         self._crossref[reference] = ir
 *         return ir             # <<<<<<<<<<<<<<
 * 
 *     cdef INDEX_T push_if_lower_fast(self, VALUE_T value,
 */
  __pyx_r = __pyx_v_ir;
  goto __pyx_L0;

  /* "skimage/graph/heap.pyx":581
 *             self._update_one(i2)
 * 
 *     cdef INDEX_T push_fast(self, VALUE_T value, REFERENCE_T reference) nogil:             # <<<<<<<<<<<<<<
 *         """The c method for fast pushing.
 * 
 */

  /* function exit code */
  __pyx_L0:;
  return __pyx_r;
}

/* "skimage/graph/heap.pyx":613
 *         return ir
 * 
 *     cdef INDEX_T push_if_lower_fast(self, VALUE_T value,             # <<<<<<<<<<<<<<
 *                                     REFERENCE_T reference) nogil:
 *         """If the reference is already present, will update its value ONLY if
 */

static __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_f_7skimage_5graph_4heap_20FastUpdateBinaryHeap_push_if_lower_fast(struct __pyx_obj_7skimage_5graph_4heap_FastUpdateBinaryHeap *__pyx_v_self, __pyx_t_7skimage_5graph_4heap_VALUE_T __pyx_v_value, __pyx_t_7skimage_5graph_4heap_REFERENCE_T __pyx_v_reference) {
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_i;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_v_ir;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_v_values;
  __pyx_t_7skimage_5graph_4heap_INDEX_T __pyx_r;
  int __pyx_t_1;
  int __pyx_t_2;
  __pyx_t_7skimage_5graph_4heap_VALUE_T *__pyx_t_3;

  /* "skimage/graph/heap.pyx":624
 * 
 *         """
 *         if not (0 <= reference <= self.max_reference):             # <<<<<<<<<<<<<<
 *             return -1
 * 
 */
  __pyx_t_1 = (0 <= __pyx_v_reference);
  if (__pyx_t_1) {
    __pyx_t_1 = (__pyx_v_reference <= __pyx_v_self->max_reference);
  }
  __pyx_t_2 = ((!(__pyx_t_1 != 0)) != 0);
  if (__pyx_t_2) {

    /* "skimage/graph/heap.pyx":625
 *         """
 *         if not (0 <= reference <= self.max_reference):
 *             return -1             # <<<<<<<<<<<<<<
 * 
 *         # init variable to store the index-in-the-heap
 */
    __pyx_r = -1L;
    goto __pyx_L0;

    /* "skimage/graph/heap.pyx":624
 * 
 *         """
 *         if not (0 <= reference <= self.max_reference):             # <<<<<<<<<<<<<<
 *             return -1
 * 
 */
  }

  /* "skimage/graph/heap.pyx":632
 *         # Reference is the index in the array where MCP is applied to.
 *         # Find the index-in-the-heap using the crossref array.
 *         cdef INDEX_T ir = self._crossref[reference]             # <<<<<<<<<<<<<<
 *         cdef VALUE_T *values = self._values
 *         self._pushed = 1
 */
  __pyx_v_ir = (__pyx_v_self->_crossref[__pyx_v_reference]);

  /* "skimage/graph/heap.pyx":633
 *         # Find the index-in-the-heap using the crossref array.
 *         cdef INDEX_T ir = self._crossref[reference]
 *         cdef VALUE_T *values = self._values             # <<<<<<<<<<<<<<
 *         self._pushed = 1
 *         if ir != -1:
 */
  __pyx_t_3 = __pyx_v_self->__pyx_base._values;
  __pyx_v_values = __pyx_t_3;

  /* "skimage/graph/heap.pyx":634
 *         cdef INDEX_T ir = self._crossref[reference]
 *         cdef VALUE_T *values = self._values
 *         self._pushed = 1             # <<<<<<<<<<<<<<
 *         if ir != -1:
 *             # update
 */
  __pyx_v_self->_pushed = 1;

  /* "skimage/graph/heap.pyx":635
 *         cdef VALUE_T *values = self._values
 *         self._pushed = 1
 *         if ir != -1:             # <<<<<<<<<<<<<<
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 */
  __pyx_t_2 = ((__pyx_v_ir != -1L) != 0);
  if (__pyx_t_2) {

    /* "skimage/graph/heap.pyx":637
 *         if ir != -1:
 *             # update
 *             i = (1 << self.levels) - 1 + ir             # <<<<<<<<<<<<<<
 *             if values[i] > value:
 *                 values[i] = value
 */
    __pyx_v_i = (((1 << __pyx_v_self->__pyx_base.levels) - 1) + __pyx_v_ir);

    /* "skimage/graph/heap.pyx":638
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 *             if values[i] > value:             # <<<<<<<<<<<<<<
 *                 values[i] = value
 *                 self._update_one(i)
 */
    __pyx_t_2 = (((__pyx_v_values[__pyx_v_i]) > __pyx_v_value) != 0);
    if (__pyx_t_2) {

      /* "skimage/graph/heap.pyx":639
 *             i = (1 << self.levels) - 1 + ir
 *             if values[i] > value:
 *                 values[i] = value             # <<<<<<<<<<<<<<
 *                 self._update_one(i)
 *             else:
 */
      (__pyx_v_values[__pyx_v_i]) = __pyx_v_value;

      /* "skimage/graph/heap.pyx":640
 *             if values[i] > value:
 *                 values[i] = value
 *                 self._update_one(i)             # <<<<<<<<<<<<<<
 *             else:
 *                 self._pushed = 0
 */
      ((struct __pyx_vtabstruct_7skimage_5graph_4heap_FastUpdateBinaryHeap *)__pyx_v_self->__pyx_base.__pyx_vtab)->__pyx_base._update_one(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), __pyx_v_i);

      /* "skimage/graph/heap.pyx":638
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 *             if values[i] > value:             # <<<<<<<<<<<<<<
 *                 values[i] = value
 *                 self._update_one(i)
 */
      goto __pyx_L5;
    }

    /* "skimage/graph/heap.pyx":642
 *                 self._update_one(i)
 *             else:
 *                 self._pushed = 0             # <<<<<<<<<<<<<<
 *             return ir
 * 
 */
    /*else*/ {
      __pyx_v_self->_pushed = 0;
    }
    __pyx_L5:;

    /* "skimage/graph/heap.pyx":643
 *             else:
 *                 self._pushed = 0
 *             return ir             # <<<<<<<<<<<<<<
 * 
 *         # if not updated: append normally and store reference
 */
    __pyx_r = __pyx_v_ir;
    goto __pyx_L0;

    /* "skimage/graph/heap.pyx":635
 *         cdef VALUE_T *values = self._values
 *         self._pushed = 1
 *         if ir != -1:             # <<<<<<<<<<<<<<
 *             # update
 *             i = (1 << self.levels) - 1 + ir
 */
  }

  /* "skimage/graph/heap.pyx":646
 * 
 *         # if not updated: append normally and store reference
 *         ir = BinaryHeap.push_fast(self, value, reference)             # <<<<<<<<<<<<<<
 *         self._crossref[reference] = ir
 *         return ir
 */
  __pyx_v_ir = __pyx_f_7skimage_5graph_4heap_10BinaryHeap_push_fast(((struct __pyx_obj_7skimage_5graph_4heap_BinaryHeap *)__pyx_v_self), __pyx_v_value, __pyx_v_reference);

  /* "skimage/graph/heap.pyx":647
 *         # if not updated: append normally and store reference
 *         ir = BinaryHeap.push_fast(self, value, reference)
 *         self._crossref[reference] = ir             # <<<<<<<<<<<<<<
 *         return ir
 * 
 */
  (__pyx_v_self->_crossref[__pyx_v_reference]) = __pyx_v_ir;

  /* "skimage/graph/heap.pyx":648
 *         ir = BinaryHeap.push_fast(self, value, reference)
 *         self._crossref[reference] = ir
 *         return ir             # <<<<<<<<<<<<<<
 * 
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static void __pyx_tp_dealloc_7skimage_5graph_4heap_FastUpdateBinaryHeap(PyObject *o) {
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  "FastUpdateBinaryHeap(initial_capacity=128, max_reference=None)\n\n    Binary heap that allows the value of a reference to be updated quickly.\n\n    This heap class keeps cross-references so that the value associated with a\n    given reference can be quickly queried (O(1) time) or updated (O(log2(N))\n    time). This is ideal for pathfinding algorithms that implement some\n    variant of Dijkstra's algorithm.\n\n    Parameters\n    ----------\n    initial_capacity : int\n        Estimate of the size of the heap, if known in advance. (In any case,\n        the heap will dynamically grow and shrink as required, though never\n        below the `initial_capacity`.)\n\n    max_reference : int, optional\n        Largest reference value that might be pushed to the heap. (Pushing a\n        larger value will result in an error.) If no value is provided,\n        `1-initial_capacity` will be used. For the cross-reference index to\n        work, all references must be in the range [0, max_reference];\n        references pushed outside of that range will not be added to the heap.\n        The cross-references are kept as a 1-d array of length\n        `max_reference+1', so memory use of this heap is effectively\n        O(max_reference)\n\n    Attributes\n    ----------\n    count : int\n        The number of values in the heap\n    levels : int\n        The number of levels in the binary heap (see Notes below). The values\n        are stored in the last level, so 2**levels is the capacity of the\n        heap before another resize is required.\n    min_levels : int\n        The minimum number of levels in the heap (relates to the\n        `initial_capacity` parameter.)\n    max_reference : int\n        The provided or calculated maximum allowed reference value.\n\n    Notes\n    -----\n    The cross-references map data[reference]->internalindex, such that the\n    value corresponding to a given reference can be found efficiently. This\n    can be queried with the value_of() ""method.\n\n    A special method, push_if_lower() is provided that will update the heap if\n    the given reference is not in the heap, or if it is and the provided value\n    is lower than the current value in the heap. This is again useful for\n    pathfinding algorithms.\n\n    ", /*tp_doc*/
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/* PyObjectGetAttrStr */
#if CYTHON_USE_TYPE_SLOTS
static CYTHON_INLINE PyObject* __Pyx_PyObject_GetAttrStr(PyObject* obj, PyObject* attr_name) {
    PyTypeObject* tp = Py_TYPE(obj);
    if (likely(tp->tp_getattro))
        return tp->tp_getattro(obj, attr_name);
#if PY_MAJOR_VERSION < 3
    if (likely(tp->tp_getattr))
        return tp->tp_getattr(obj, PyString_AS_STRING(attr_name));
#endif
    return PyObject_GetAttr(obj, attr_name);
}
#endif

/* GetBuiltinName */
static PyObject *__Pyx_GetBuiltinName(PyObject *name) {
    PyObject* result = __Pyx_PyObject_GetAttrStr(__pyx_b, name);
    if (unlikely(!result)) {
        PyErr_Format(PyExc_NameError,
#if PY_MAJOR_VERSION >= 3
            "name '%U' is not defined", name);
#else
            "name '%.200s' is not defined", PyString_AS_STRING(name));
#endif
    }
    return result;
}

/* RaiseDoubleKeywords */
static void __Pyx_RaiseDoubleKeywordsError(
    const char* func_name,
    PyObject* kw_name)
{
    PyErr_Format(PyExc_TypeError,
        #if PY_MAJOR_VERSION >= 3
        "%s() got multiple values for keyword argument '%U'", func_name, kw_name);
        #else
        "%s() got multiple values for keyword argument '%s'", func_name,
        PyString_AsString(kw_name));
        #endif
}

/* ParseKeywords */
static int __Pyx_ParseOptionalKeywords(
    PyObject *kwds,
    PyObject **argnames[],
    PyObject *kwds2,
    PyObject *values[],
    Py_ssize_t num_pos_args,
    const char* function_name)
{
    PyObject *key = 0, *value = 0;
    Py_ssize_t pos = 0;
    PyObject*** name;
    PyObject*** first_kw_arg = argnames + num_pos_args;
    while (PyDict_Next(kwds, &pos, &key, &value)) {
        name = first_kw_arg;
        while (*name && (**name != key)) name++;
        if (*name) {
            values[name-argnames] = value;
            continue;
        }
        name = first_kw_arg;
        #if PY_MAJOR_VERSION < 3
        if (likely(PyString_CheckExact(key)) || likely(PyString_Check(key))) {
            while (*name) {
                if ((CYTHON_COMPILING_IN_PYPY || PyString_GET_SIZE(**name) == PyString_GET_SIZE(key))
                        && _PyString_Eq(**name, key)) {
                    values[name-argnames] = value;
                    break;
                }
                name++;
            }
            if (*name) continue;
            else {
                PyObject*** argname = argnames;
                while (argname != first_kw_arg) {
                    if ((**argname == key) || (
                            (CYTHON_COMPILING_IN_PYPY || PyString_GET_SIZE(**argname) == PyString_GET_SIZE(key))
                             && _PyString_Eq(**argname, key))) {
                        goto arg_passed_twice;
                    }
                    argname++;
                }
            }
        } else
        #endif
        if (likely(PyUnicode_Check(key))) {
            while (*name) {
                int cmp = (**name == key) ? 0 :
                #if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION >= 3
                    (PyUnicode_GET_SIZE(**name) != PyUnicode_GET_SIZE(key)) ? 1 :
                #endif
                    PyUnicode_Compare(**name, key);
                if (cmp < 0 && unlikely(PyErr_Occurred())) goto bad;
                if (cmp == 0) {
                    values[name-argnames] = value;
                    break;
                }
                name++;
            }
            if (*name) continue;
            else {
                PyObject*** argname = argnames;
                while (argname != first_kw_arg) {
                    int cmp = (**argname == key) ? 0 :
                    #if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION >= 3
                        (PyUnicode_GET_SIZE(**argname) != PyUnicode_GET_SIZE(key)) ? 1 :
                    #endif
                        PyUnicode_Compare(**argname, key);
                    if (cmp < 0 && unlikely(PyErr_Occurred())) goto bad;
                    if (cmp == 0) goto arg_passed_twice;
                    argname++;
                }
            }
        } else
            goto invalid_keyword_type;
        if (kwds2) {
            if (unlikely(PyDict_SetItem(kwds2, key, value))) goto bad;
        } else {
            goto invalid_keyword;
        }
    }
    return 0;
arg_passed_twice:
    __Pyx_RaiseDoubleKeywordsError(function_name, key);
    goto bad;
invalid_keyword_type:
    PyErr_Format(PyExc_TypeError,
        "%.200s() keywords must be strings", function_name);
    goto bad;
invalid_keyword:
    PyErr_Format(PyExc_TypeError,
    #if PY_MAJOR_VERSION < 3
        "%.200s() got an unexpected keyword argument '%.200s'",
        function_name, PyString_AsString(key));
    #else
        "%s() got an unexpected keyword argument '%U'",
        function_name, key);
    #endif
bad:
    return -1;
}

/* RaiseArgTupleInvalid */
static void __Pyx_RaiseArgtupleInvalid(
    const char* func_name,
    int exact,
    Py_ssize_t num_min,
    Py_ssize_t num_max,
    Py_ssize_t num_found)
{
    Py_ssize_t num_expected;
    const char *more_or_less;
    if (num_found < num_min) {
        num_expected = num_min;
        more_or_less = "at least";
    } else {
        num_expected = num_max;
        more_or_less = "at most";
    }
    if (exact) {
        more_or_less = "exactly";
    }
    PyErr_Format(PyExc_TypeError,
                 "%.200s() takes %.8s %" CYTHON_FORMAT_SSIZE_T "d positional argument%.1s (%" CYTHON_FORMAT_SSIZE_T "d given)",
                 func_name, more_or_less, num_expected,
                 (num_expected == 1) ? "" : "s", num_found);
}

/* PyFunctionFastCall */
#if CYTHON_FAST_PYCALL
static PyObject* __Pyx_PyFunction_FastCallNoKw(PyCodeObject *co, PyObject **args, Py_ssize_t na,
                                               PyObject *globals) {
    PyFrameObject *f;
    PyThreadState *tstate = __Pyx_PyThreadState_Current;
    PyObject **fastlocals;
    Py_ssize_t i;
    PyObject *result;
    assert(globals != NULL);
    /* XXX Perhaps we should create a specialized
       PyFrame_New() that doesn't take locals, but does
       take builtins without sanity checking them.
       */
    assert(tstate != NULL);
    f = PyFrame_New(tstate, co, globals, NULL);
    if (f == NULL) {
        return NULL;
    }
    fastlocals = __Pyx_PyFrame_GetLocalsplus(f);
    for (i = 0; i < na; i++) {
        Py_INCREF(*args);
        fastlocals[i] = *args++;
    }
    result = PyEval_EvalFrameEx(f,0);
    ++tstate->recursion_depth;
    Py_DECREF(f);
    --tstate->recursion_depth;
    return result;
}
#if 1 || PY_VERSION_HEX < 0x030600B1
static PyObject *__Pyx_PyFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs, PyObject *kwargs) {
    PyCodeObject *co = (PyCodeObject *)PyFunction_GET_CODE(func);
    PyObject *globals = PyFunction_GET_GLOBALS(func);
    PyObject *argdefs = PyFunction_GET_DEFAULTS(func);
    PyObject *closure;
#if PY_MAJOR_VERSION >= 3
    PyObject *kwdefs;
#endif
    PyObject *kwtuple, **k;
    PyObject **d;
    Py_ssize_t nd;
    Py_ssize_t nk;
    PyObject *result;
    assert(kwargs == NULL || PyDict_Check(kwargs));
    nk = kwargs ? PyDict_Size(kwargs) : 0;
    if (Py_EnterRecursiveCall((char*)" while calling a Python object")) {
        return NULL;
    }
    if (
#if PY_MAJOR_VERSION >= 3
            co->co_kwonlyargcount == 0 &&
#endif
            likely(kwargs == NULL || nk == 0) &&
            co->co_flags == (CO_OPTIMIZED | CO_NEWLOCALS | CO_NOFREE)) {
        if (argdefs == NULL && co->co_argcount == nargs) {
            result = __Pyx_PyFunction_FastCallNoKw(co, args, nargs, globals);
            goto done;
        }
        else if (nargs == 0 && argdefs != NULL
                 && co->co_argcount == Py_SIZE(argdefs)) {
            /* function called with no arguments, but all parameters have
               a default value: use default values as arguments .*/
            args = &PyTuple_GET_ITEM(argdefs, 0);
            result =__Pyx_PyFunction_FastCallNoKw(co, args, Py_SIZE(argdefs), globals);
            goto done;
        }
    }
    if (kwargs != NULL) {
        Py_ssize_t pos, i;
        kwtuple = PyTuple_New(2 * nk);
        if (kwtuple == NULL) {
            result = NULL;
            goto done;
        }
        k = &PyTuple_GET_ITEM(kwtuple, 0);
        pos = i = 0;
        while (PyDict_Next(kwargs, &pos, &k[i], &k[i+1])) {
            Py_INCREF(k[i]);
            Py_INCREF(k[i+1]);
            i += 2;
        }
        nk = i / 2;
    }
    else {
        kwtuple = NULL;
        k = NULL;
    }
    closure = PyFunction_GET_CLOSURE(func);
#if PY_MAJOR_VERSION >= 3
    kwdefs = PyFunction_GET_KW_DEFAULTS(func);
#endif
    if (argdefs != NULL) {
        d = &PyTuple_GET_ITEM(argdefs, 0);
        nd = Py_SIZE(argdefs);
    }
    else {
        d = NULL;
        nd = 0;
    }
#if PY_MAJOR_VERSION >= 3
    result = PyEval_EvalCodeEx((PyObject*)co, globals, (PyObject *)NULL,
                               args, (int)nargs,
                               k, (int)nk,
                               d, (int)nd, kwdefs, closure);
#else
    result = PyEval_EvalCodeEx(co, globals, (PyObject *)NULL,
                               args, (int)nargs,
                               k, (int)nk,
                               d, (int)nd, closure);
#endif
    Py_XDECREF(kwtuple);
done:
    Py_LeaveRecursiveCall();
    return result;
}
#endif
#endif

/* PyObjectCall */
#if CYTHON_COMPILING_IN_CPYTHON
static CYTHON_INLINE PyObject* __Pyx_PyObject_Call(PyObject *func, PyObject *arg, PyObject *kw) {
    PyObject *result;
    ternaryfunc call = func->ob_type->tp_call;
    if (unlikely(!call))
        return PyObject_Call(func, arg, kw);
    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
        return NULL;
    result = (*call)(func, arg, kw);
    Py_LeaveRecursiveCall();
    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
        PyErr_SetString(
            PyExc_SystemError,
            "NULL result without error in PyObject_Call");
    }
    return result;
}
#endif

/* PyObjectCallMethO */
#if CYTHON_COMPILING_IN_CPYTHON
static CYTHON_INLINE PyObject* __Pyx_PyObject_CallMethO(PyObject *func, PyObject *arg) {
    PyObject *self, *result;
    PyCFunction cfunc;
    cfunc = PyCFunction_GET_FUNCTION(func);
    self = PyCFunction_GET_SELF(func);
    if (unlikely(Py_EnterRecursiveCall((char*)" while calling a Python object")))
        return NULL;
    result = cfunc(self, arg);
    Py_LeaveRecursiveCall();
    if (unlikely(!result) && unlikely(!PyErr_Occurred())) {
        PyErr_SetString(
            PyExc_SystemError,
            "NULL result without error in PyObject_Call");
    }
    return result;
}
#endif

/* PyObjectCallNoArg */
#if CYTHON_COMPILING_IN_CPYTHON
static CYTHON_INLINE PyObject* __Pyx_PyObject_CallNoArg(PyObject *func) {
#if CYTHON_FAST_PYCALL
    if (PyFunction_Check(func)) {
        return __Pyx_PyFunction_FastCall(func, NULL, 0);
    }
#endif
#ifdef __Pyx_CyFunction_USED
    if (likely(PyCFunction_Check(func) || __Pyx_CyFunction_Check(func)))
#else
    if (likely(PyCFunction_Check(func)))
#endif
    {
        if (likely(PyCFunction_GET_FLAGS(func) & METH_NOARGS)) {
            return __Pyx_PyObject_CallMethO(func, NULL);
        }
    }
    return __Pyx_PyObject_Call(func, __pyx_empty_tuple, NULL);
}
#endif

/* PyCFunctionFastCall */
#if CYTHON_FAST_PYCCALL
static CYTHON_INLINE PyObject * __Pyx_PyCFunction_FastCall(PyObject *func_obj, PyObject **args, Py_ssize_t nargs) {
    PyCFunctionObject *func = (PyCFunctionObject*)func_obj;
    PyCFunction meth = PyCFunction_GET_FUNCTION(func);
    PyObject *self = PyCFunction_GET_SELF(func);
    int flags = PyCFunction_GET_FLAGS(func);
    assert(PyCFunction_Check(func));
    assert(METH_FASTCALL == (flags & ~(METH_CLASS | METH_STATIC | METH_COEXIST | METH_KEYWORDS | METH_STACKLESS)));
    assert(nargs >= 0);
    assert(nargs == 0 || args != NULL);
    /* _PyCFunction_FastCallDict() must not be called with an exception set,
       because it may clear it (directly or indirectly) and so the
       caller loses its exception */
    assert(!PyErr_Occurred());
    if ((PY_VERSION_HEX < 0x030700A0) || unlikely(flags & METH_KEYWORDS)) {
        return (*((__Pyx_PyCFunctionFastWithKeywords)(void*)meth)) (self, args, nargs, NULL);
    } else {
        return (*((__Pyx_PyCFunctionFast)(void*)meth)) (self, args, nargs);
    }
}
#endif

/* PyObjectCallOneArg */
#if CYTHON_COMPILING_IN_CPYTHON
static PyObject* __Pyx__PyObject_CallOneArg(PyObject *func, PyObject *arg) {
    PyObject *result;
    PyObject *args = PyTuple_New(1);
    if (unlikely(!args)) return NULL;
    Py_INCREF(arg);
    PyTuple_SET_ITEM(args, 0, arg);
    result = __Pyx_PyObject_Call(func, args, NULL);
    Py_DECREF(args);
    return result;
}
static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
#if CYTHON_FAST_PYCALL
    if (PyFunction_Check(func)) {
        return __Pyx_PyFunction_FastCall(func, &arg, 1);
    }
#endif
    if (likely(PyCFunction_Check(func))) {
        if (likely(PyCFunction_GET_FLAGS(func) & METH_O)) {
            return __Pyx_PyObject_CallMethO(func, arg);
#if CYTHON_FAST_PYCCALL
        } else if (PyCFunction_GET_FLAGS(func) & METH_FASTCALL) {
            return __Pyx_PyCFunction_FastCall(func, &arg, 1);
#endif
        }
    }
    return __Pyx__PyObject_CallOneArg(func, arg);
}
#else
static CYTHON_INLINE PyObject* __Pyx_PyObject_CallOneArg(PyObject *func, PyObject *arg) {
    PyObject *result;
    PyObject *args = PyTuple_Pack(1, arg);
    if (unlikely(!args)) return NULL;
    result = __Pyx_PyObject_Call(func, args, NULL);
    Py_DECREF(args);
    return result;
}
#endif

/* PyIntBinop */
#if !CYTHON_COMPILING_IN_PYPY
static PyObject* __Pyx_PyInt_SubtractObjC(PyObject *op1, PyObject *op2, CYTHON_UNUSED long intval, int inplace, int zerodivision_check) {
    (void)inplace;
    (void)zerodivision_check;
    #if PY_MAJOR_VERSION < 3
    if (likely(PyInt_CheckExact(op1))) {
        const long b = intval;
        long x;
        long a = PyInt_AS_LONG(op1);
            x = (long)((unsigned long)a - b);
            if (likely((x^a) >= 0 || (x^~b) >= 0))
                return PyInt_FromLong(x);
            return PyLong_Type.tp_as_number->nb_subtract(op1, op2);
    }
    #endif
    #if CYTHON_USE_PYLONG_INTERNALS
    if (likely(PyLong_CheckExact(op1))) {
        const long b = intval;
        long a, x;
#ifdef HAVE_LONG_LONG
        const PY_LONG_LONG llb = intval;
        PY_LONG_LONG lla, llx;
#endif
        const digit* digits = ((PyLongObject*)op1)->ob_digit;
        const Py_ssize_t size = Py_SIZE(op1);
        if (likely(__Pyx_sst_abs(size) <= 1)) {
            a = likely(size) ? digits[0] : 0;
            if (size == -1) a = -a;
        } else {
            switch (size) {
                case -2:
                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
                        a = -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
                        break;
#ifdef HAVE_LONG_LONG
                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 2 * PyLong_SHIFT) {
                        lla = -(PY_LONG_LONG) (((((unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
                        goto long_long;
#endif
                    }
                    CYTHON_FALLTHROUGH;
                case 2:
                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
                        a = (long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
                        break;
#ifdef HAVE_LONG_LONG
                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 2 * PyLong_SHIFT) {
                        lla = (PY_LONG_LONG) (((((unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
                        goto long_long;
#endif
                    }
                    CYTHON_FALLTHROUGH;
                case -3:
                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
                        a = -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
                        break;
#ifdef HAVE_LONG_LONG
                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 3 * PyLong_SHIFT) {
                        lla = -(PY_LONG_LONG) (((((((unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
                        goto long_long;
#endif
                    }
                    CYTHON_FALLTHROUGH;
                case 3:
                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
                        a = (long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
                        break;
#ifdef HAVE_LONG_LONG
                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 3 * PyLong_SHIFT) {
                        lla = (PY_LONG_LONG) (((((((unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
                        goto long_long;
#endif
                    }
                    CYTHON_FALLTHROUGH;
                case -4:
                    if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
                        a = -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
                        break;
#ifdef HAVE_LONG_LONG
                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 4 * PyLong_SHIFT) {
                        lla = -(PY_LONG_LONG) (((((((((unsigned PY_LONG_LONG)digits[3]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
                        goto long_long;
#endif
                    }
                    CYTHON_FALLTHROUGH;
                case 4:
                    if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
                        a = (long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0]));
                        break;
#ifdef HAVE_LONG_LONG
                    } else if (8 * sizeof(PY_LONG_LONG) - 1 > 4 * PyLong_SHIFT) {
                        lla = (PY_LONG_LONG) (((((((((unsigned PY_LONG_LONG)digits[3]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[2]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[1]) << PyLong_SHIFT) | (unsigned PY_LONG_LONG)digits[0]));
                        goto long_long;
#endif
                    }
                    CYTHON_FALLTHROUGH;
                default: return PyLong_Type.tp_as_number->nb_subtract(op1, op2);
            }
        }
                x = a - b;
            return PyLong_FromLong(x);
#ifdef HAVE_LONG_LONG
        long_long:
                llx = lla - llb;
            return PyLong_FromLongLong(llx);
#endif
        
        
    }
    #endif
    if (PyFloat_CheckExact(op1)) {
        const long b = intval;
        double a = PyFloat_AS_DOUBLE(op1);
            double result;
            PyFPE_START_PROTECT("subtract", return NULL)
            result = ((double)a) - (double)b;
            PyFPE_END_PROTECT(result)
            return PyFloat_FromDouble(result);
    }
    return (inplace ? PyNumber_InPlaceSubtract : PyNumber_Subtract)(op1, op2);
}
#endif

/* PyNumberPow2 */
static PyObject* __Pyx__PyNumber_PowerOf2(PyObject *two, PyObject *exp, PyObject *none, int inplace) {
#if !CYTHON_COMPILING_IN_PYPY
    Py_ssize_t shiftby;
#if PY_MAJOR_VERSION < 3
    if (likely(PyInt_CheckExact(exp))) {
        shiftby = PyInt_AS_LONG(exp);
    } else
#endif
    if (likely(PyLong_CheckExact(exp))) {
        #if CYTHON_USE_PYLONG_INTERNALS
        const Py_ssize_t size = Py_SIZE(exp);
        if (likely(size == 1)) {
            shiftby = ((PyLongObject*)exp)->ob_digit[0];
        } else if (size == 0) {
            return PyInt_FromLong(1L);
        } else if (unlikely(size < 0)) {
            goto fallback;
        } else {
            shiftby = PyLong_AsSsize_t(exp);
        }
        #else
        shiftby = PyLong_AsSsize_t(exp);
        #endif
    } else {
        goto fallback;
    }
    if (likely(shiftby >= 0)) {
        if ((size_t)shiftby <= sizeof(long) * 8 - 2) {
            long value = 1L << shiftby;
            return PyInt_FromLong(value);
#ifdef HAVE_LONG_LONG
        } else if ((size_t)shiftby <= sizeof(unsigned PY_LONG_LONG) * 8 - 1) {
            unsigned PY_LONG_LONG value = ((unsigned PY_LONG_LONG)1) << shiftby;
            return PyLong_FromUnsignedLongLong(value);
#endif
        } else {
            PyObject *result, *one = PyInt_FromLong(1L);
            if (unlikely(!one)) return NULL;
            result = PyNumber_Lshift(one, exp);
            Py_DECREF(one);
            return result;
        }
    } else if (shiftby == -1 && PyErr_Occurred()) {
        PyErr_Clear();
    }
fallback:
#endif
    return (inplace ? PyNumber_InPlacePower : PyNumber_Power)(two, exp, none);
}

/* PyUnicode_Substring */
static CYTHON_INLINE PyObject* __Pyx_PyUnicode_Substring(
            PyObject* text, Py_ssize_t start, Py_ssize_t stop) {
    Py_ssize_t length;
    if (unlikely(__Pyx_PyUnicode_READY(text) == -1)) return NULL;
    length = __Pyx_PyUnicode_GET_LENGTH(text);
    if (start < 0) {
        start += length;
        if (start < 0)
            start = 0;
    }
    if (stop < 0)
        stop += length;
    else if (stop > length)
        stop = length;
    length = stop - start;
    if (length <= 0)
        return PyUnicode_FromUnicode(NULL, 0);
#if CYTHON_PEP393_ENABLED
    return PyUnicode_FromKindAndData(PyUnicode_KIND(text),
        PyUnicode_1BYTE_DATA(text) + start*PyUnicode_KIND(text), stop-start);
#else
    return PyUnicode_FromUnicode(PyUnicode_AS_UNICODE(text)+start, stop-start);
#endif
}

/* PyErrFetchRestore */
#if CYTHON_FAST_THREAD_STATE
static CYTHON_INLINE void __Pyx_ErrRestoreInState(PyThreadState *tstate, PyObject *type, PyObject *value, PyObject *tb) {
    PyObject *tmp_type, *tmp_value, *tmp_tb;
    tmp_type = tstate->curexc_type;
    tmp_value = tstate->curexc_value;
    tmp_tb = tstate->curexc_traceback;
    tstate->curexc_type = type;
    tstate->curexc_value = value;
    tstate->curexc_traceback = tb;
    Py_XDECREF(tmp_type);
    Py_XDECREF(tmp_value);
    Py_XDECREF(tmp_tb);
}
static CYTHON_INLINE void __Pyx_ErrFetchInState(PyThreadState *tstate, PyObject **type, PyObject **value, PyObject **tb) {
    *type = tstate->curexc_type;
    *value = tstate->curexc_value;
    *tb = tstate->curexc_traceback;
    tstate->curexc_type = 0;
    tstate->curexc_value = 0;
    tstate->curexc_traceback = 0;
}
#endif

/* WriteUnraisableException */
static void __Pyx_WriteUnraisable(const char *name, CYTHON_UNUSED int clineno,
                                  CYTHON_UNUSED int lineno, CYTHON_UNUSED const char *filename,
                                  int full_traceback, CYTHON_UNUSED int nogil) {
    PyObject *old_exc, *old_val, *old_tb;
    PyObject *ctx;
    __Pyx_PyThreadState_declare
#ifdef WITH_THREAD
    PyGILState_STATE state;
    if (nogil)
        state = PyGILState_Ensure();
#ifdef _MSC_VER
    else state = (PyGILState_STATE)-1;
#endif
#endif
    __Pyx_PyThreadState_assign
    __Pyx_ErrFetch(&old_exc, &old_val, &old_tb);
    if (full_traceback) {
        Py_XINCREF(old_exc);
        Py_XINCREF(old_val);
        Py_XINCREF(old_tb);
        __Pyx_ErrRestore(old_exc, old_val, old_tb);
        PyErr_PrintEx(1);
    }
    #if PY_MAJOR_VERSION < 3
    ctx = PyString_FromString(name);
    #else
    ctx = PyUnicode_FromString(name);
    #endif
    __Pyx_ErrRestore(old_exc, old_val, old_tb);
    if (!ctx) {
        PyErr_WriteUnraisable(Py_None);
    } else {
        PyErr_WriteUnraisable(ctx);
        Py_DECREF(ctx);
    }
#ifdef WITH_THREAD
    if (nogil)
        PyGILState_Release(state);
#endif
}

/* None */
static CYTHON_INLINE __pyx_t_7skimage_5graph_4heap_INDEX_T __Pyx_div___pyx_t_7skimage_5graph_4heap_INDEX_T(__pyx_t_7skimage_5graph_4heap_INDEX_T a, __pyx_t_7skimage_5graph_4heap_INDEX_T b) {
    __pyx_t_7skimage_5graph_4heap_INDEX_T q = a / b;
    __pyx_t_7skimage_5graph_4heap_INDEX_T r = a - q*b;
    q -= ((r != 0) & ((r ^ b) < 0));
    return q;
}

/* None */
static CYTHON_INLINE __pyx_t_7skimage_5graph_4heap_INDEX_T __Pyx_mod___pyx_t_7skimage_5graph_4heap_INDEX_T(__pyx_t_7skimage_5graph_4heap_INDEX_T a, __pyx_t_7skimage_5graph_4heap_INDEX_T b) {
    __pyx_t_7skimage_5graph_4heap_INDEX_T r = a % b;
    r += ((r != 0) & ((r ^ b) < 0)) * b;
    return r;
}

/* RaiseException */
#if PY_MAJOR_VERSION < 3
static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb,
                        CYTHON_UNUSED PyObject *cause) {
    __Pyx_PyThreadState_declare
    Py_XINCREF(type);
    if (!value || value == Py_None)
        value = NULL;
    else
        Py_INCREF(value);
    if (!tb || tb == Py_None)
        tb = NULL;
    else {
        Py_INCREF(tb);
        if (!PyTraceBack_Check(tb)) {
            PyErr_SetString(PyExc_TypeError,
                "raise: arg 3 must be a traceback or None");
            goto raise_error;
        }
    }
    if (PyType_Check(type)) {
#if CYTHON_COMPILING_IN_PYPY
        if (!value) {
            Py_INCREF(Py_None);
            value = Py_None;
        }
#endif
        PyErr_NormalizeException(&type, &value, &tb);
    } else {
        if (value) {
            PyErr_SetString(PyExc_TypeError,
                "instance exception may not have a separate value");
            goto raise_error;
        }
        value = type;
        type = (PyObject*) Py_TYPE(type);
        Py_INCREF(type);
        if (!PyType_IsSubtype((PyTypeObject *)type, (PyTypeObject *)PyExc_BaseException)) {
            PyErr_SetString(PyExc_TypeError,
                "raise: exception class must be a subclass of BaseException");
            goto raise_error;
        }
    }
    __Pyx_PyThreadState_assign
    __Pyx_ErrRestore(type, value, tb);
    return;
raise_error:
    Py_XDECREF(value);
    Py_XDECREF(type);
    Py_XDECREF(tb);
    return;
}
#else
static void __Pyx_Raise(PyObject *type, PyObject *value, PyObject *tb, PyObject *cause) {
    PyObject* owned_instance = NULL;
    if (tb == Py_None) {
        tb = 0;
    } else if (tb && !PyTraceBack_Check(tb)) {
        PyErr_SetString(PyExc_TypeError,
            "raise: arg 3 must be a traceback or None");
        goto bad;
    }
    if (value == Py_None)
        value = 0;
    if (PyExceptionInstance_Check(type)) {
        if (value) {
            PyErr_SetString(PyExc_TypeError,
                "instance exception may not have a separate value");
            goto bad;
        }
        value = type;
        type = (PyObject*) Py_TYPE(value);
    } else if (PyExceptionClass_Check(type)) {
        PyObject *instance_class = NULL;
        if (value && PyExceptionInstance_Check(value)) {
            instance_class = (PyObject*) Py_TYPE(value);
            if (instance_class != type) {
                int is_subclass = PyObject_IsSubclass(instance_class, type);
                if (!is_subclass) {
                    instance_class = NULL;
                } else if (unlikely(is_subclass == -1)) {
                    goto bad;
                } else {
                    type = instance_class;
                }
            }
        }
        if (!instance_class) {
            PyObject *args;
            if (!value)
                args = PyTuple_New(0);
            else if (PyTuple_Check(value)) {
                Py_INCREF(value);
                args = value;
            } else
                args = PyTuple_Pack(1, value);
            if (!args)
                goto bad;
            owned_instance = PyObject_Call(type, args, NULL);
            Py_DECREF(args);
            if (!owned_instance)
                goto bad;
            value = owned_instance;
            if (!PyExceptionInstance_Check(value)) {
                PyErr_Format(PyExc_TypeError,
                             "calling %R should have returned an instance of "
                             "BaseException, not %R",
                             type, Py_TYPE(value));
                goto bad;
            }
        }
    } else {
        PyErr_SetString(PyExc_TypeError,
            "raise: exception class must be a subclass of BaseException");
        goto bad;
    }
    if (cause) {
        PyObject *fixed_cause;
        if (cause == Py_None) {
            fixed_cause = NULL;
        } else if (PyExceptionClass_Check(cause)) {
            fixed_cause = PyObject_CallObject(cause, NULL);
            if (fixed_cause == NULL)
                goto bad;
        } else if (PyExceptionInstance_Check(cause)) {
            fixed_cause = cause;
            Py_INCREF(fixed_cause);
        } else {
            PyErr_SetString(PyExc_TypeError,
                            "exception causes must derive from "
                            "BaseException");
            goto bad;
        }
        PyException_SetCause(value, fixed_cause);
    }
    PyErr_SetObject(type, value);
    if (tb) {
#if CYTHON_COMPILING_IN_PYPY
        PyObject *tmp_type, *tmp_value, *tmp_tb;
        PyErr_Fetch(&tmp_type, &tmp_value, &tmp_tb);
        Py_INCREF(tb);
        PyErr_Restore(tmp_type, tmp_value, tb);
        Py_XDECREF(tmp_tb);
#else
        PyThreadState *tstate = __Pyx_PyThreadState_Current;
        PyObject* tmp_tb = tstate->curexc_traceback;
        if (tb != tmp_tb) {
            Py_INCREF(tb);
            tstate->curexc_traceback = tb;
            Py_XDECREF(tmp_tb);
        }
#endif
    }
bad:
    Py_XDECREF(owned_instance);
    return;
}
#endif

/* PyObjectCall2Args */
static CYTHON_UNUSED PyObject* __Pyx_PyObject_Call2Args(PyObject* function, PyObject* arg1, PyObject* arg2) {
    PyObject *args, *result = NULL;
    #if CYTHON_FAST_PYCALL
    if (PyFunction_Check(function)) {
        PyObject *args[2] = {arg1, arg2};
        return __Pyx_PyFunction_FastCall(function, args, 2);
    }
    #endif
    #if CYTHON_FAST_PYCCALL
    if (__Pyx_PyFastCFunction_Check(function)) {
        PyObject *args[2] = {arg1, arg2};
        return __Pyx_PyCFunction_FastCall(function, args, 2);
    }
    #endif
    args = PyTuple_New(2);
    if (unlikely(!args)) goto done;
    Py_INCREF(arg1);
    PyTuple_SET_ITEM(args, 0, arg1);
    Py_INCREF(arg2);
    PyTuple_SET_ITEM(args, 1, arg2);
    Py_INCREF(function);
    result = __Pyx_PyObject_Call(function, args, NULL);
    Py_DECREF(args);
    Py_DECREF(function);
done:
    return result;
}

/* PyObject_GenericGetAttrNoDict */
#if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
static PyObject *__Pyx_RaiseGenericGetAttributeError(PyTypeObject *tp, PyObject *attr_name) {
    PyErr_Format(PyExc_AttributeError,
#if PY_MAJOR_VERSION >= 3
                 "'%.50s' object has no attribute '%U'",
                 tp->tp_name, attr_name);
#else
                 "'%.50s' object has no attribute '%.400s'",
                 tp->tp_name, PyString_AS_STRING(attr_name));
#endif
    return NULL;
}
static CYTHON_INLINE PyObject* __Pyx_PyObject_GenericGetAttrNoDict(PyObject* obj, PyObject* attr_name) {
    PyObject *descr;
    PyTypeObject *tp = Py_TYPE(obj);
    if (unlikely(!PyString_Check(attr_name))) {
        return PyObject_GenericGetAttr(obj, attr_name);
    }
    assert(!tp->tp_dictoffset);
    descr = _PyType_Lookup(tp, attr_name);
    if (unlikely(!descr)) {
        return __Pyx_RaiseGenericGetAttributeError(tp, attr_name);
    }
    Py_INCREF(descr);
    #if PY_MAJOR_VERSION < 3
    if (likely(PyType_HasFeature(Py_TYPE(descr), Py_TPFLAGS_HAVE_CLASS)))
    #endif
    {
        descrgetfunc f = Py_TYPE(descr)->tp_descr_get;
        if (unlikely(f)) {
            PyObject *res = f(descr, obj, (PyObject *)tp);
            Py_DECREF(descr);
            return res;
        }
    }
    return descr;
}
#endif

/* PyObject_GenericGetAttr */
#if CYTHON_USE_TYPE_SLOTS && CYTHON_USE_PYTYPE_LOOKUP && PY_VERSION_HEX < 0x03070000
static PyObject* __Pyx_PyObject_GenericGetAttr(PyObject* obj, PyObject* attr_name) {
    if (unlikely(Py_TYPE(obj)->tp_dictoffset)) {
        return PyObject_GenericGetAttr(obj, attr_name);
    }
    return __Pyx_PyObject_GenericGetAttrNoDict(obj, attr_name);
}
#endif

/* SetVTable */
static int __Pyx_SetVtable(PyObject *dict, void *vtable) {
#if PY_VERSION_HEX >= 0x02070000
    PyObject *ob = PyCapsule_New(vtable, 0, 0);
#else
    PyObject *ob = PyCObject_FromVoidPtr(vtable, 0);
#endif
    if (!ob)
        goto bad;
    if (PyDict_SetItem(dict, __pyx_n_s_pyx_vtable, ob) < 0)
        goto bad;
    Py_DECREF(ob);
    return 0;
bad:
    Py_XDECREF(ob);
    return -1;
}

/* SetupReduce */
static int __Pyx_setup_reduce_is_named(PyObject* meth, PyObject* name) {
  int ret;
  PyObject *name_attr;
  name_attr = __Pyx_PyObject_GetAttrStr(meth, __pyx_n_s_name);
  if (likely(name_attr)) {
      ret = PyObject_RichCompareBool(name_attr, name, Py_EQ);
  } else {
      ret = -1;
  }
  if (unlikely(ret < 0)) {
      PyErr_Clear();
      ret = 0;
  }
  Py_XDECREF(name_attr);
  return ret;
}
static int __Pyx_setup_reduce(PyObject* type_obj) {
    int ret = 0;
    PyObject *object_reduce = NULL;
    PyObject *object_reduce_ex = NULL;
    PyObject *reduce = NULL;
    PyObject *reduce_ex = NULL;
    PyObject *reduce_cython = NULL;
    PyObject *setstate = NULL;
    PyObject *setstate_cython = NULL;
#if CYTHON_USE_PYTYPE_LOOKUP
    if (_PyType_Lookup((PyTypeObject*)type_obj, __pyx_n_s_getstate)) goto GOOD;
#else
    if (PyObject_HasAttr(type_obj, __pyx_n_s_getstate)) goto GOOD;
#endif
#if CYTHON_USE_PYTYPE_LOOKUP
    object_reduce_ex = _PyType_Lookup(&PyBaseObject_Type, __pyx_n_s_reduce_ex); if (!object_reduce_ex) goto BAD;
#else
    object_reduce_ex = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, __pyx_n_s_reduce_ex); if (!object_reduce_ex) goto BAD;
#endif
    reduce_ex = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce_ex); if (unlikely(!reduce_ex)) goto BAD;
    if (reduce_ex == object_reduce_ex) {
#if CYTHON_USE_PYTYPE_LOOKUP
        object_reduce = _PyType_Lookup(&PyBaseObject_Type, __pyx_n_s_reduce); if (!object_reduce) goto BAD;
#else
        object_reduce = __Pyx_PyObject_GetAttrStr((PyObject*)&PyBaseObject_Type, __pyx_n_s_reduce); if (!object_reduce) goto BAD;
#endif
        reduce = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce); if (unlikely(!reduce)) goto BAD;
        if (reduce == object_reduce || __Pyx_setup_reduce_is_named(reduce, __pyx_n_s_reduce_cython)) {
            reduce_cython = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_reduce_cython); if (unlikely(!reduce_cython)) goto BAD;
            ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_reduce, reduce_cython); if (unlikely(ret < 0)) goto BAD;
            ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_reduce_cython); if (unlikely(ret < 0)) goto BAD;
            setstate = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_setstate);
            if (!setstate) PyErr_Clear();
            if (!setstate || __Pyx_setup_reduce_is_named(setstate, __pyx_n_s_setstate_cython)) {
                setstate_cython = __Pyx_PyObject_GetAttrStr(type_obj, __pyx_n_s_setstate_cython); if (unlikely(!setstate_cython)) goto BAD;
                ret = PyDict_SetItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_setstate, setstate_cython); if (unlikely(ret < 0)) goto BAD;
                ret = PyDict_DelItem(((PyTypeObject*)type_obj)->tp_dict, __pyx_n_s_setstate_cython); if (unlikely(ret < 0)) goto BAD;
            }
            PyType_Modified((PyTypeObject*)type_obj);
        }
    }
    goto GOOD;
BAD:
    if (!PyErr_Occurred())
        PyErr_Format(PyExc_RuntimeError, "Unable to initialize pickling for %s", ((PyTypeObject*)type_obj)->tp_name);
    ret = -1;
GOOD:
#if !CYTHON_USE_PYTYPE_LOOKUP
    Py_XDECREF(object_reduce);
    Py_XDECREF(object_reduce_ex);
#endif
    Py_XDECREF(reduce);
    Py_XDECREF(reduce_ex);
    Py_XDECREF(reduce_cython);
    Py_XDECREF(setstate);
    Py_XDECREF(setstate_cython);
    return ret;
}

/* PyDictVersioning */
#if CYTHON_USE_DICT_VERSIONS && CYTHON_USE_TYPE_SLOTS
static CYTHON_INLINE PY_UINT64_T __Pyx_get_tp_dict_version(PyObject *obj) {
    PyObject *dict = Py_TYPE(obj)->tp_dict;
    return likely(dict) ? __PYX_GET_DICT_VERSION(dict) : 0;
}
static CYTHON_INLINE PY_UINT64_T __Pyx_get_object_dict_version(PyObject *obj) {
    PyObject **dictptr = NULL;
    Py_ssize_t offset = Py_TYPE(obj)->tp_dictoffset;
    if (offset) {
#if CYTHON_COMPILING_IN_CPYTHON
        dictptr = (likely(offset > 0)) ? (PyObject **) ((char *)obj + offset) : _PyObject_GetDictPtr(obj);
#else
        dictptr = _PyObject_GetDictPtr(obj);
#endif
    }
    return (dictptr && *dictptr) ? __PYX_GET_DICT_VERSION(*dictptr) : 0;
}
static CYTHON_INLINE int __Pyx_object_dict_version_matches(PyObject* obj, PY_UINT64_T tp_dict_version, PY_UINT64_T obj_dict_version) {
    PyObject *dict = Py_TYPE(obj)->tp_dict;
    if (unlikely(!dict) || unlikely(tp_dict_version != __PYX_GET_DICT_VERSION(dict)))
        return 0;
    return obj_dict_version == __Pyx_get_object_dict_version(obj);
}
#endif

/* CLineInTraceback */
#ifndef CYTHON_CLINE_IN_TRACEBACK
static int __Pyx_CLineForTraceback(PyThreadState *tstate, int c_line) {
    PyObject *use_cline;
    PyObject *ptype, *pvalue, *ptraceback;
#if CYTHON_COMPILING_IN_CPYTHON
    PyObject **cython_runtime_dict;
#endif
    if (unlikely(!__pyx_cython_runtime)) {
        return c_line;
    }
    __Pyx_ErrFetchInState(tstate, &ptype, &pvalue, &ptraceback);
#if CYTHON_COMPILING_IN_CPYTHON
    cython_runtime_dict = _PyObject_GetDictPtr(__pyx_cython_runtime);
    if (likely(cython_runtime_dict)) {
        __PYX_PY_DICT_LOOKUP_IF_MODIFIED(
            use_cline, *cython_runtime_dict,
            __Pyx_PyDict_GetItemStr(*cython_runtime_dict, __pyx_n_s_cline_in_traceback))
    } else
#endif
    {
      PyObject *use_cline_obj = __Pyx_PyObject_GetAttrStr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback);
      if (use_cline_obj) {
        use_cline = PyObject_Not(use_cline_obj) ? Py_False : Py_True;
        Py_DECREF(use_cline_obj);
      } else {
        PyErr_Clear();
        use_cline = NULL;
      }
    }
    if (!use_cline) {
        c_line = 0;
        PyObject_SetAttr(__pyx_cython_runtime, __pyx_n_s_cline_in_traceback, Py_False);
    }
    else if (use_cline == Py_False || (use_cline != Py_True && PyObject_Not(use_cline) != 0)) {
        c_line = 0;
    }
    __Pyx_ErrRestoreInState(tstate, ptype, pvalue, ptraceback);
    return c_line;
}
#endif

/* CodeObjectCache */
static int __pyx_bisect_code_objects(__Pyx_CodeObjectCacheEntry* entries, int count, int code_line) {
    int start = 0, mid = 0, end = count - 1;
    if (end >= 0 && code_line > entries[end].code_line) {
        return count;
    }
    while (start < end) {
        mid = start + (end - start) / 2;
        if (code_line < entries[mid].code_line) {
            end = mid;
        } else if (code_line > entries[mid].code_line) {
             start = mid + 1;
        } else {
            return mid;
        }
    }
    if (code_line <= entries[mid].code_line) {
        return mid;
    } else {
        return mid + 1;
    }
}
static PyCodeObject *__pyx_find_code_object(int code_line) {
    PyCodeObject* code_object;
    int pos;
    if (unlikely(!code_line) || unlikely(!__pyx_code_cache.entries)) {
        return NULL;
    }
    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
    if (unlikely(pos >= __pyx_code_cache.count) || unlikely(__pyx_code_cache.entries[pos].code_line != code_line)) {
        return NULL;
    }
    code_object = __pyx_code_cache.entries[pos].code_object;
    Py_INCREF(code_object);
    return code_object;
}
static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object) {
    int pos, i;
    __Pyx_CodeObjectCacheEntry* entries = __pyx_code_cache.entries;
    if (unlikely(!code_line)) {
        return;
    }
    if (unlikely(!entries)) {
        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Malloc(64*sizeof(__Pyx_CodeObjectCacheEntry));
        if (likely(entries)) {
            __pyx_code_cache.entries = entries;
            __pyx_code_cache.max_count = 64;
            __pyx_code_cache.count = 1;
            entries[0].code_line = code_line;
            entries[0].code_object = code_object;
            Py_INCREF(code_object);
        }
        return;
    }
    pos = __pyx_bisect_code_objects(__pyx_code_cache.entries, __pyx_code_cache.count, code_line);
    if ((pos < __pyx_code_cache.count) && unlikely(__pyx_code_cache.entries[pos].code_line == code_line)) {
        PyCodeObject* tmp = entries[pos].code_object;
        entries[pos].code_object = code_object;
        Py_DECREF(tmp);
        return;
    }
    if (__pyx_code_cache.count == __pyx_code_cache.max_count) {
        int new_max = __pyx_code_cache.max_count + 64;
        entries = (__Pyx_CodeObjectCacheEntry*)PyMem_Realloc(
            __pyx_code_cache.entries, (size_t)new_max*sizeof(__Pyx_CodeObjectCacheEntry));
        if (unlikely(!entries)) {
            return;
        }
        __pyx_code_cache.entries = entries;
        __pyx_code_cache.max_count = new_max;
    }
    for (i=__pyx_code_cache.count; i>pos; i--) {
        entries[i] = entries[i-1];
    }
    entries[pos].code_line = code_line;
    entries[pos].code_object = code_object;
    __pyx_code_cache.count++;
    Py_INCREF(code_object);
}

/* AddTraceback */
#include "compile.h"
#include "frameobject.h"
#include "traceback.h"
static PyCodeObject* __Pyx_CreateCodeObjectForTraceback(
            const char *funcname, int c_line,
            int py_line, const char *filename) {
    PyCodeObject *py_code = 0;
    PyObject *py_srcfile = 0;
    PyObject *py_funcname = 0;
    #if PY_MAJOR_VERSION < 3
    py_srcfile = PyString_FromString(filename);
    #else
    py_srcfile = PyUnicode_FromString(filename);
    #endif
    if (!py_srcfile) goto bad;
    if (c_line) {
        #if PY_MAJOR_VERSION < 3
        py_funcname = PyString_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
        #else
        py_funcname = PyUnicode_FromFormat( "%s (%s:%d)", funcname, __pyx_cfilenm, c_line);
        #endif
    }
    else {
        #if PY_MAJOR_VERSION < 3
        py_funcname = PyString_FromString(funcname);
        #else
        py_funcname = PyUnicode_FromString(funcname);
        #endif
    }
    if (!py_funcname) goto bad;
    py_code = __Pyx_PyCode_New(
        0,
        0,
        0,
        0,
        0,
        __pyx_empty_bytes, /*PyObject *code,*/
        __pyx_empty_tuple, /*PyObject *consts,*/
        __pyx_empty_tuple, /*PyObject *names,*/
        __pyx_empty_tuple, /*PyObject *varnames,*/
        __pyx_empty_tuple, /*PyObject *freevars,*/
        __pyx_empty_tuple, /*PyObject *cellvars,*/
        py_srcfile,   /*PyObject *filename,*/
        py_funcname,  /*PyObject *name,*/
        py_line,
        __pyx_empty_bytes  /*PyObject *lnotab*/
    );
    Py_DECREF(py_srcfile);
    Py_DECREF(py_funcname);
    return py_code;
bad:
    Py_XDECREF(py_srcfile);
    Py_XDECREF(py_funcname);
    return NULL;
}
static void __Pyx_AddTraceback(const char *funcname, int c_line,
                               int py_line, const char *filename) {
    PyCodeObject *py_code = 0;
    PyFrameObject *py_frame = 0;
    PyThreadState *tstate = __Pyx_PyThreadState_Current;
    if (c_line) {
        c_line = __Pyx_CLineForTraceback(tstate, c_line);
    }
    py_code = __pyx_find_code_object(c_line ? -c_line : py_line);
    if (!py_code) {
        py_code = __Pyx_CreateCodeObjectForTraceback(
            funcname, c_line, py_line, filename);
        if (!py_code) goto bad;
        __pyx_insert_code_object(c_line ? -c_line : py_line, py_code);
    }
    py_frame = PyFrame_New(
        tstate,            /*PyThreadState *tstate,*/
        py_code,           /*PyCodeObject *code,*/
        __pyx_d,    /*PyObject *globals,*/
        0                  /*PyObject *locals*/
    );
    if (!py_frame) goto bad;
    __Pyx_PyFrame_SetLineNumber(py_frame, py_line);
    PyTraceBack_Here(py_frame);
bad:
    Py_XDECREF(py_code);
    Py_XDECREF(py_frame);
}

/* CIntFromPyVerify */
#define __PYX_VERIFY_RETURN_INT(target_type, func_type, func_value)\
    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 0)
#define __PYX_VERIFY_RETURN_INT_EXC(target_type, func_type, func_value)\
    __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, 1)
#define __PYX__VERIFY_RETURN_INT(target_type, func_type, func_value, exc)\
    {\
        func_type value = func_value;\
        if (sizeof(target_type) < sizeof(func_type)) {\
            if (unlikely(value != (func_type) (target_type) value)) {\
                func_type zero = 0;\
                if (exc && unlikely(value == (func_type)-1 && PyErr_Occurred()))\
                    return (target_type) -1;\
                if (is_unsigned && unlikely(value < zero))\
                    goto raise_neg_overflow;\
                else\
                    goto raise_overflow;\
            }\
        }\
        return (target_type) value;\
    }

/* None */
static CYTHON_INLINE long __Pyx_pow_long(long b, long e) {
    long t = b;
    switch (e) {
        case 3:
            t *= b;
        CYTHON_FALLTHROUGH;
        case 2:
            t *= b;
        CYTHON_FALLTHROUGH;
        case 1:
            return t;
        case 0:
            return 1;
    }
    #if 1
    if (unlikely(e<0)) return 0;
    #endif
    t = 1;
    while (likely(e)) {
        t *= (b * (e&1)) | ((~e)&1);
        b *= b;
        e >>= 1;
    }
    return t;
}

/* CIntToPy */
static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
    const long neg_one = (long) ((long) 0 - (long) 1), const_zero = (long) 0;
    const int is_unsigned = neg_one > const_zero;
    if (is_unsigned) {
        if (sizeof(long) < sizeof(long)) {
            return PyInt_FromLong((long) value);
        } else if (sizeof(long) <= sizeof(unsigned long)) {
            return PyLong_FromUnsignedLong((unsigned long) value);
#ifdef HAVE_LONG_LONG
        } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
#endif
        }
    } else {
        if (sizeof(long) <= sizeof(long)) {
            return PyInt_FromLong((long) value);
#ifdef HAVE_LONG_LONG
        } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
            return PyLong_FromLongLong((PY_LONG_LONG) value);
#endif
        }
    }
    {
        int one = 1; int little = (int)*(unsigned char *)&one;
        unsigned char *bytes = (unsigned char *)&value;
        return _PyLong_FromByteArray(bytes, sizeof(long),
                                     little, !is_unsigned);
    }
}

/* CIntToPy */
static CYTHON_INLINE PyObject* __Pyx_PyInt_From_unsigned_char(unsigned char value) {
    const unsigned char neg_one = (unsigned char) ((unsigned char) 0 - (unsigned char) 1), const_zero = (unsigned char) 0;
    const int is_unsigned = neg_one > const_zero;
    if (is_unsigned) {
        if (sizeof(unsigned char) < sizeof(long)) {
            return PyInt_FromLong((long) value);
        } else if (sizeof(unsigned char) <= sizeof(unsigned long)) {
            return PyLong_FromUnsignedLong((unsigned long) value);
#ifdef HAVE_LONG_LONG
        } else if (sizeof(unsigned char) <= sizeof(unsigned PY_LONG_LONG)) {
            return PyLong_FromUnsignedLongLong((unsigned PY_LONG_LONG) value);
#endif
        }
    } else {
        if (sizeof(unsigned char) <= sizeof(long)) {
            return PyInt_FromLong((long) value);
#ifdef HAVE_LONG_LONG
        } else if (sizeof(unsigned char) <= sizeof(PY_LONG_LONG)) {
            return PyLong_FromLongLong((PY_LONG_LONG) value);
#endif
        }
    }
    {
        int one = 1; int little = (int)*(unsigned char *)&one;
        unsigned char *bytes = (unsigned char *)&value;
        return _PyLong_FromByteArray(bytes, sizeof(unsigned char),
                                     little, !is_unsigned);
    }
}

/* CIntFromPy */
static CYTHON_INLINE int __Pyx_PyInt_As_int(PyObject *x) {
    const int neg_one = (int) ((int) 0 - (int) 1), const_zero = (int) 0;
    const int is_unsigned = neg_one > const_zero;
#if PY_MAJOR_VERSION < 3
    if (likely(PyInt_Check(x))) {
        if (sizeof(int) < sizeof(long)) {
            __PYX_VERIFY_RETURN_INT(int, long, PyInt_AS_LONG(x))
        } else {
            long val = PyInt_AS_LONG(x);
            if (is_unsigned && unlikely(val < 0)) {
                goto raise_neg_overflow;
            }
            return (int) val;
        }
    } else
#endif
    if (likely(PyLong_Check(x))) {
        if (is_unsigned) {
#if CYTHON_USE_PYLONG_INTERNALS
            const digit* digits = ((PyLongObject*)x)->ob_digit;
            switch (Py_SIZE(x)) {
                case  0: return (int) 0;
                case  1: __PYX_VERIFY_RETURN_INT(int, digit, digits[0])
                case 2:
                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) >= 2 * PyLong_SHIFT) {
                            return (int) (((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
                        }
                    }
                    break;
                case 3:
                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) >= 3 * PyLong_SHIFT) {
                            return (int) (((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
                        }
                    }
                    break;
                case 4:
                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) >= 4 * PyLong_SHIFT) {
                            return (int) (((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0]));
                        }
                    }
                    break;
            }
#endif
#if CYTHON_COMPILING_IN_CPYTHON
            if (unlikely(Py_SIZE(x) < 0)) {
                goto raise_neg_overflow;
            }
#else
            {
                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
                if (unlikely(result < 0))
                    return (int) -1;
                if (unlikely(result == 1))
                    goto raise_neg_overflow;
            }
#endif
            if (sizeof(int) <= sizeof(unsigned long)) {
                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned long, PyLong_AsUnsignedLong(x))
#ifdef HAVE_LONG_LONG
            } else if (sizeof(int) <= sizeof(unsigned PY_LONG_LONG)) {
                __PYX_VERIFY_RETURN_INT_EXC(int, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
#endif
            }
        } else {
#if CYTHON_USE_PYLONG_INTERNALS
            const digit* digits = ((PyLongObject*)x)->ob_digit;
            switch (Py_SIZE(x)) {
                case  0: return (int) 0;
                case -1: __PYX_VERIFY_RETURN_INT(int, sdigit, (sdigit) (-(sdigit)digits[0]))
                case  1: __PYX_VERIFY_RETURN_INT(int,  digit, +digits[0])
                case -2:
                    if (8 * sizeof(int) - 1 > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
                            return (int) (((int)-1)*(((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
                        }
                    }
                    break;
                case 2:
                    if (8 * sizeof(int) > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
                            return (int) ((((((int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
                        }
                    }
                    break;
                case -3:
                    if (8 * sizeof(int) - 1 > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
                            return (int) (((int)-1)*(((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
                        }
                    }
                    break;
                case 3:
                    if (8 * sizeof(int) > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
                            return (int) ((((((((int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
                        }
                    }
                    break;
                case -4:
                    if (8 * sizeof(int) - 1 > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
                            return (int) (((int)-1)*(((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
                        }
                    }
                    break;
                case 4:
                    if (8 * sizeof(int) > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(int, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(int) - 1 > 4 * PyLong_SHIFT) {
                            return (int) ((((((((((int)digits[3]) << PyLong_SHIFT) | (int)digits[2]) << PyLong_SHIFT) | (int)digits[1]) << PyLong_SHIFT) | (int)digits[0])));
                        }
                    }
                    break;
            }
#endif
            if (sizeof(int) <= sizeof(long)) {
                __PYX_VERIFY_RETURN_INT_EXC(int, long, PyLong_AsLong(x))
#ifdef HAVE_LONG_LONG
            } else if (sizeof(int) <= sizeof(PY_LONG_LONG)) {
                __PYX_VERIFY_RETURN_INT_EXC(int, PY_LONG_LONG, PyLong_AsLongLong(x))
#endif
            }
        }
        {
#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
            PyErr_SetString(PyExc_RuntimeError,
                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
#else
            int val;
            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
 #if PY_MAJOR_VERSION < 3
            if (likely(v) && !PyLong_Check(v)) {
                PyObject *tmp = v;
                v = PyNumber_Long(tmp);
                Py_DECREF(tmp);
            }
 #endif
            if (likely(v)) {
                int one = 1; int is_little = (int)*(unsigned char *)&one;
                unsigned char *bytes = (unsigned char *)&val;
                int ret = _PyLong_AsByteArray((PyLongObject *)v,
                                              bytes, sizeof(val),
                                              is_little, !is_unsigned);
                Py_DECREF(v);
                if (likely(!ret))
                    return val;
            }
#endif
            return (int) -1;
        }
    } else {
        int val;
        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
        if (!tmp) return (int) -1;
        val = __Pyx_PyInt_As_int(tmp);
        Py_DECREF(tmp);
        return val;
    }
raise_overflow:
    PyErr_SetString(PyExc_OverflowError,
        "value too large to convert to int");
    return (int) -1;
raise_neg_overflow:
    PyErr_SetString(PyExc_OverflowError,
        "can't convert negative value to int");
    return (int) -1;
}

/* CIntFromPy */
static CYTHON_INLINE unsigned char __Pyx_PyInt_As_unsigned_char(PyObject *x) {
    const unsigned char neg_one = (unsigned char) ((unsigned char) 0 - (unsigned char) 1), const_zero = (unsigned char) 0;
    const int is_unsigned = neg_one > const_zero;
#if PY_MAJOR_VERSION < 3
    if (likely(PyInt_Check(x))) {
        if (sizeof(unsigned char) < sizeof(long)) {
            __PYX_VERIFY_RETURN_INT(unsigned char, long, PyInt_AS_LONG(x))
        } else {
            long val = PyInt_AS_LONG(x);
            if (is_unsigned && unlikely(val < 0)) {
                goto raise_neg_overflow;
            }
            return (unsigned char) val;
        }
    } else
#endif
    if (likely(PyLong_Check(x))) {
        if (is_unsigned) {
#if CYTHON_USE_PYLONG_INTERNALS
            const digit* digits = ((PyLongObject*)x)->ob_digit;
            switch (Py_SIZE(x)) {
                case  0: return (unsigned char) 0;
                case  1: __PYX_VERIFY_RETURN_INT(unsigned char, digit, digits[0])
                case 2:
                    if (8 * sizeof(unsigned char) > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) >= 2 * PyLong_SHIFT) {
                            return (unsigned char) (((((unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0]));
                        }
                    }
                    break;
                case 3:
                    if (8 * sizeof(unsigned char) > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) >= 3 * PyLong_SHIFT) {
                            return (unsigned char) (((((((unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0]));
                        }
                    }
                    break;
                case 4:
                    if (8 * sizeof(unsigned char) > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) >= 4 * PyLong_SHIFT) {
                            return (unsigned char) (((((((((unsigned char)digits[3]) << PyLong_SHIFT) | (unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0]));
                        }
                    }
                    break;
            }
#endif
#if CYTHON_COMPILING_IN_CPYTHON
            if (unlikely(Py_SIZE(x) < 0)) {
                goto raise_neg_overflow;
            }
#else
            {
                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
                if (unlikely(result < 0))
                    return (unsigned char) -1;
                if (unlikely(result == 1))
                    goto raise_neg_overflow;
            }
#endif
            if (sizeof(unsigned char) <= sizeof(unsigned long)) {
                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, unsigned long, PyLong_AsUnsignedLong(x))
#ifdef HAVE_LONG_LONG
            } else if (sizeof(unsigned char) <= sizeof(unsigned PY_LONG_LONG)) {
                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
#endif
            }
        } else {
#if CYTHON_USE_PYLONG_INTERNALS
            const digit* digits = ((PyLongObject*)x)->ob_digit;
            switch (Py_SIZE(x)) {
                case  0: return (unsigned char) 0;
                case -1: __PYX_VERIFY_RETURN_INT(unsigned char, sdigit, (sdigit) (-(sdigit)digits[0]))
                case  1: __PYX_VERIFY_RETURN_INT(unsigned char,  digit, +digits[0])
                case -2:
                    if (8 * sizeof(unsigned char) - 1 > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) - 1 > 2 * PyLong_SHIFT) {
                            return (unsigned char) (((unsigned char)-1)*(((((unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
                        }
                    }
                    break;
                case 2:
                    if (8 * sizeof(unsigned char) > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) - 1 > 2 * PyLong_SHIFT) {
                            return (unsigned char) ((((((unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
                        }
                    }
                    break;
                case -3:
                    if (8 * sizeof(unsigned char) - 1 > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) - 1 > 3 * PyLong_SHIFT) {
                            return (unsigned char) (((unsigned char)-1)*(((((((unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
                        }
                    }
                    break;
                case 3:
                    if (8 * sizeof(unsigned char) > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) - 1 > 3 * PyLong_SHIFT) {
                            return (unsigned char) ((((((((unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
                        }
                    }
                    break;
                case -4:
                    if (8 * sizeof(unsigned char) - 1 > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) - 1 > 4 * PyLong_SHIFT) {
                            return (unsigned char) (((unsigned char)-1)*(((((((((unsigned char)digits[3]) << PyLong_SHIFT) | (unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
                        }
                    }
                    break;
                case 4:
                    if (8 * sizeof(unsigned char) > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(unsigned char, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(unsigned char) - 1 > 4 * PyLong_SHIFT) {
                            return (unsigned char) ((((((((((unsigned char)digits[3]) << PyLong_SHIFT) | (unsigned char)digits[2]) << PyLong_SHIFT) | (unsigned char)digits[1]) << PyLong_SHIFT) | (unsigned char)digits[0])));
                        }
                    }
                    break;
            }
#endif
            if (sizeof(unsigned char) <= sizeof(long)) {
                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, long, PyLong_AsLong(x))
#ifdef HAVE_LONG_LONG
            } else if (sizeof(unsigned char) <= sizeof(PY_LONG_LONG)) {
                __PYX_VERIFY_RETURN_INT_EXC(unsigned char, PY_LONG_LONG, PyLong_AsLongLong(x))
#endif
            }
        }
        {
#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
            PyErr_SetString(PyExc_RuntimeError,
                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
#else
            unsigned char val;
            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
 #if PY_MAJOR_VERSION < 3
            if (likely(v) && !PyLong_Check(v)) {
                PyObject *tmp = v;
                v = PyNumber_Long(tmp);
                Py_DECREF(tmp);
            }
 #endif
            if (likely(v)) {
                int one = 1; int is_little = (int)*(unsigned char *)&one;
                unsigned char *bytes = (unsigned char *)&val;
                int ret = _PyLong_AsByteArray((PyLongObject *)v,
                                              bytes, sizeof(val),
                                              is_little, !is_unsigned);
                Py_DECREF(v);
                if (likely(!ret))
                    return val;
            }
#endif
            return (unsigned char) -1;
        }
    } else {
        unsigned char val;
        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
        if (!tmp) return (unsigned char) -1;
        val = __Pyx_PyInt_As_unsigned_char(tmp);
        Py_DECREF(tmp);
        return val;
    }
raise_overflow:
    PyErr_SetString(PyExc_OverflowError,
        "value too large to convert to unsigned char");
    return (unsigned char) -1;
raise_neg_overflow:
    PyErr_SetString(PyExc_OverflowError,
        "can't convert negative value to unsigned char");
    return (unsigned char) -1;
}

/* CIntFromPy */
static CYTHON_INLINE long __Pyx_PyInt_As_long(PyObject *x) {
    const long neg_one = (long) ((long) 0 - (long) 1), const_zero = (long) 0;
    const int is_unsigned = neg_one > const_zero;
#if PY_MAJOR_VERSION < 3
    if (likely(PyInt_Check(x))) {
        if (sizeof(long) < sizeof(long)) {
            __PYX_VERIFY_RETURN_INT(long, long, PyInt_AS_LONG(x))
        } else {
            long val = PyInt_AS_LONG(x);
            if (is_unsigned && unlikely(val < 0)) {
                goto raise_neg_overflow;
            }
            return (long) val;
        }
    } else
#endif
    if (likely(PyLong_Check(x))) {
        if (is_unsigned) {
#if CYTHON_USE_PYLONG_INTERNALS
            const digit* digits = ((PyLongObject*)x)->ob_digit;
            switch (Py_SIZE(x)) {
                case  0: return (long) 0;
                case  1: __PYX_VERIFY_RETURN_INT(long, digit, digits[0])
                case 2:
                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) >= 2 * PyLong_SHIFT) {
                            return (long) (((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
                        }
                    }
                    break;
                case 3:
                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) >= 3 * PyLong_SHIFT) {
                            return (long) (((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
                        }
                    }
                    break;
                case 4:
                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) >= 4 * PyLong_SHIFT) {
                            return (long) (((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0]));
                        }
                    }
                    break;
            }
#endif
#if CYTHON_COMPILING_IN_CPYTHON
            if (unlikely(Py_SIZE(x) < 0)) {
                goto raise_neg_overflow;
            }
#else
            {
                int result = PyObject_RichCompareBool(x, Py_False, Py_LT);
                if (unlikely(result < 0))
                    return (long) -1;
                if (unlikely(result == 1))
                    goto raise_neg_overflow;
            }
#endif
            if (sizeof(long) <= sizeof(unsigned long)) {
                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned long, PyLong_AsUnsignedLong(x))
#ifdef HAVE_LONG_LONG
            } else if (sizeof(long) <= sizeof(unsigned PY_LONG_LONG)) {
                __PYX_VERIFY_RETURN_INT_EXC(long, unsigned PY_LONG_LONG, PyLong_AsUnsignedLongLong(x))
#endif
            }
        } else {
#if CYTHON_USE_PYLONG_INTERNALS
            const digit* digits = ((PyLongObject*)x)->ob_digit;
            switch (Py_SIZE(x)) {
                case  0: return (long) 0;
                case -1: __PYX_VERIFY_RETURN_INT(long, sdigit, (sdigit) (-(sdigit)digits[0]))
                case  1: __PYX_VERIFY_RETURN_INT(long,  digit, +digits[0])
                case -2:
                    if (8 * sizeof(long) - 1 > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
                            return (long) (((long)-1)*(((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
                        }
                    }
                    break;
                case 2:
                    if (8 * sizeof(long) > 1 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 2 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
                            return (long) ((((((long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
                        }
                    }
                    break;
                case -3:
                    if (8 * sizeof(long) - 1 > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
                            return (long) (((long)-1)*(((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
                        }
                    }
                    break;
                case 3:
                    if (8 * sizeof(long) > 2 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 3 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
                            return (long) ((((((((long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
                        }
                    }
                    break;
                case -4:
                    if (8 * sizeof(long) - 1 > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, long, -(long) (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
                            return (long) (((long)-1)*(((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
                        }
                    }
                    break;
                case 4:
                    if (8 * sizeof(long) > 3 * PyLong_SHIFT) {
                        if (8 * sizeof(unsigned long) > 4 * PyLong_SHIFT) {
                            __PYX_VERIFY_RETURN_INT(long, unsigned long, (((((((((unsigned long)digits[3]) << PyLong_SHIFT) | (unsigned long)digits[2]) << PyLong_SHIFT) | (unsigned long)digits[1]) << PyLong_SHIFT) | (unsigned long)digits[0])))
                        } else if (8 * sizeof(long) - 1 > 4 * PyLong_SHIFT) {
                            return (long) ((((((((((long)digits[3]) << PyLong_SHIFT) | (long)digits[2]) << PyLong_SHIFT) | (long)digits[1]) << PyLong_SHIFT) | (long)digits[0])));
                        }
                    }
                    break;
            }
#endif
            if (sizeof(long) <= sizeof(long)) {
                __PYX_VERIFY_RETURN_INT_EXC(long, long, PyLong_AsLong(x))
#ifdef HAVE_LONG_LONG
            } else if (sizeof(long) <= sizeof(PY_LONG_LONG)) {
                __PYX_VERIFY_RETURN_INT_EXC(long, PY_LONG_LONG, PyLong_AsLongLong(x))
#endif
            }
        }
        {
#if CYTHON_COMPILING_IN_PYPY && !defined(_PyLong_AsByteArray)
            PyErr_SetString(PyExc_RuntimeError,
                            "_PyLong_AsByteArray() not available in PyPy, cannot convert large numbers");
#else
            long val;
            PyObject *v = __Pyx_PyNumber_IntOrLong(x);
 #if PY_MAJOR_VERSION < 3
            if (likely(v) && !PyLong_Check(v)) {
                PyObject *tmp = v;
                v = PyNumber_Long(tmp);
                Py_DECREF(tmp);
            }
 #endif
            if (likely(v)) {
                int one = 1; int is_little = (int)*(unsigned char *)&one;
                unsigned char *bytes = (unsigned char *)&val;
                int ret = _PyLong_AsByteArray((PyLongObject *)v,
                                              bytes, sizeof(val),
                                              is_little, !is_unsigned);
                Py_DECREF(v);
                if (likely(!ret))
                    return val;
            }
#endif
            return (long) -1;
        }
    } else {
        long val;
        PyObject *tmp = __Pyx_PyNumber_IntOrLong(x);
        if (!tmp) return (long) -1;
        val = __Pyx_PyInt_As_long(tmp);
        Py_DECREF(tmp);
        return val;
    }
raise_overflow:
    PyErr_SetString(PyExc_OverflowError,
        "value too large to convert to long");
    return (long) -1;
raise_neg_overflow:
    PyErr_SetString(PyExc_OverflowError,
        "can't convert negative value to long");
    return (long) -1;
}

/* FastTypeChecks */
#if CYTHON_COMPILING_IN_CPYTHON
static int __Pyx_InBases(PyTypeObject *a, PyTypeObject *b) {
    while (a) {
        a = a->tp_base;
        if (a == b)
            return 1;
    }
    return b == &PyBaseObject_Type;
}
static CYTHON_INLINE int __Pyx_IsSubtype(PyTypeObject *a, PyTypeObject *b) {
    PyObject *mro;
    if (a == b) return 1;
    mro = a->tp_mro;
    if (likely(mro)) {
        Py_ssize_t i, n;
        n = PyTuple_GET_SIZE(mro);
        for (i = 0; i < n; i++) {
            if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b)
                return 1;
        }
        return 0;
    }
    return __Pyx_InBases(a, b);
}
#if PY_MAJOR_VERSION == 2
static int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject* exc_type2) {
    PyObject *exception, *value, *tb;
    int res;
    __Pyx_PyThreadState_declare
    __Pyx_PyThreadState_assign
    __Pyx_ErrFetch(&exception, &value, &tb);
    res = exc_type1 ? PyObject_IsSubclass(err, exc_type1) : 0;
    if (unlikely(res == -1)) {
        PyErr_WriteUnraisable(err);
        res = 0;
    }
    if (!res) {
        res = PyObject_IsSubclass(err, exc_type2);
        if (unlikely(res == -1)) {
            PyErr_WriteUnraisable(err);
            res = 0;
        }
    }
    __Pyx_ErrRestore(exception, value, tb);
    return res;
}
#else
static CYTHON_INLINE int __Pyx_inner_PyErr_GivenExceptionMatches2(PyObject *err, PyObject* exc_type1, PyObject *exc_type2) {
    int res = exc_type1 ? __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type1) : 0;
    if (!res) {
        res = __Pyx_IsSubtype((PyTypeObject*)err, (PyTypeObject*)exc_type2);
    }
    return res;
}
#endif
static int __Pyx_PyErr_GivenExceptionMatchesTuple(PyObject *exc_type, PyObject *tuple) {
    Py_ssize_t i, n;
    assert(PyExceptionClass_Check(exc_type));
    n = PyTuple_GET_SIZE(tuple);
#if PY_MAJOR_VERSION >= 3
    for (i=0; i<n; i++) {
        if (exc_type == PyTuple_GET_ITEM(tuple, i)) return 1;
    }
#endif
    for (i=0; i<n; i++) {
        PyObject *t = PyTuple_GET_ITEM(tuple, i);
        #if PY_MAJOR_VERSION < 3
        if (likely(exc_type == t)) return 1;
        #endif
        if (likely(PyExceptionClass_Check(t))) {
            if (__Pyx_inner_PyErr_GivenExceptionMatches2(exc_type, NULL, t)) return 1;
        } else {
        }
    }
    return 0;
}
static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches(PyObject *err, PyObject* exc_type) {
    if (likely(err == exc_type)) return 1;
    if (likely(PyExceptionClass_Check(err))) {
        if (likely(PyExceptionClass_Check(exc_type))) {
            return __Pyx_inner_PyErr_GivenExceptionMatches2(err, NULL, exc_type);
        } else if (likely(PyTuple_Check(exc_type))) {
            return __Pyx_PyErr_GivenExceptionMatchesTuple(err, exc_type);
        } else {
        }
    }
    return PyErr_GivenExceptionMatches(err, exc_type);
}
static CYTHON_INLINE int __Pyx_PyErr_GivenExceptionMatches2(PyObject *err, PyObject *exc_type1, PyObject *exc_type2) {
    assert(PyExceptionClass_Check(exc_type1));
    assert(PyExceptionClass_Check(exc_type2));
    if (likely(err == exc_type1 || err == exc_type2)) return 1;
    if (likely(PyExceptionClass_Check(err))) {
        return __Pyx_inner_PyErr_GivenExceptionMatches2(err, exc_type1, exc_type2);
    }
    return (PyErr_GivenExceptionMatches(err, exc_type1) || PyErr_GivenExceptionMatches(err, exc_type2));
}
#endif

/* CheckBinaryVersion */
static int __Pyx_check_binary_version(void) {
    char ctversion[4], rtversion[4];
    PyOS_snprintf(ctversion, 4, "%d.%d", PY_MAJOR_VERSION, PY_MINOR_VERSION);
    PyOS_snprintf(rtversion, 4, "%s", Py_GetVersion());
    if (ctversion[0] != rtversion[0] || ctversion[2] != rtversion[2]) {
        char message[200];
        PyOS_snprintf(message, sizeof(message),
                      "compiletime version %s of module '%.100s' "
                      "does not match runtime version %s",
                      ctversion, __Pyx_MODULE_NAME, rtversion);
        return PyErr_WarnEx(NULL, message, 1);
    }
    return 0;
}

/* InitStrings */
static int __Pyx_InitStrings(__Pyx_StringTabEntry *t) {
    while (t->p) {
        #if PY_MAJOR_VERSION < 3
        if (t->is_unicode) {
            *t->p = PyUnicode_DecodeUTF8(t->s, t->n - 1, NULL);
        } else if (t->intern) {
            *t->p = PyString_InternFromString(t->s);
        } else {
            *t->p = PyString_FromStringAndSize(t->s, t->n - 1);
        }
        #else
        if (t->is_unicode | t->is_str) {
            if (t->intern) {
                *t->p = PyUnicode_InternFromString(t->s);
            } else if (t->encoding) {
                *t->p = PyUnicode_Decode(t->s, t->n - 1, t->encoding, NULL);
            } else {
                *t->p = PyUnicode_FromStringAndSize(t->s, t->n - 1);
            }
        } else {
            *t->p = PyBytes_FromStringAndSize(t->s, t->n - 1);
        }
        #endif
        if (!*t->p)
            return -1;
        if (PyObject_Hash(*t->p) == -1)
            return -1;
        ++t;
    }
    return 0;
}

static CYTHON_INLINE PyObject* __Pyx_PyUnicode_FromString(const char* c_str) {
    return __Pyx_PyUnicode_FromStringAndSize(c_str, (Py_ssize_t)strlen(c_str));
}
static CYTHON_INLINE const char* __Pyx_PyObject_AsString(PyObject* o) {
    Py_ssize_t ignore;
    return __Pyx_PyObject_AsStringAndSize(o, &ignore);
}
#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
#if !CYTHON_PEP393_ENABLED
static const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
    char* defenc_c;
    PyObject* defenc = _PyUnicode_AsDefaultEncodedString(o, NULL);
    if (!defenc) return NULL;
    defenc_c = PyBytes_AS_STRING(defenc);
#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
    {
        char* end = defenc_c + PyBytes_GET_SIZE(defenc);
        char* c;
        for (c = defenc_c; c < end; c++) {
            if ((unsigned char) (*c) >= 128) {
                PyUnicode_AsASCIIString(o);
                return NULL;
            }
        }
    }
#endif
    *length = PyBytes_GET_SIZE(defenc);
    return defenc_c;
}
#else
static CYTHON_INLINE const char* __Pyx_PyUnicode_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
    if (unlikely(__Pyx_PyUnicode_READY(o) == -1)) return NULL;
#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
    if (likely(PyUnicode_IS_ASCII(o))) {
        *length = PyUnicode_GET_LENGTH(o);
        return PyUnicode_AsUTF8(o);
    } else {
        PyUnicode_AsASCIIString(o);
        return NULL;
    }
#else
    return PyUnicode_AsUTF8AndSize(o, length);
#endif
}
#endif
#endif
static CYTHON_INLINE const char* __Pyx_PyObject_AsStringAndSize(PyObject* o, Py_ssize_t *length) {
#if __PYX_DEFAULT_STRING_ENCODING_IS_ASCII || __PYX_DEFAULT_STRING_ENCODING_IS_DEFAULT
    if (
#if PY_MAJOR_VERSION < 3 && __PYX_DEFAULT_STRING_ENCODING_IS_ASCII
            __Pyx_sys_getdefaultencoding_not_ascii &&
#endif
            PyUnicode_Check(o)) {
        return __Pyx_PyUnicode_AsStringAndSize(o, length);
    } else
#endif
#if (!CYTHON_COMPILING_IN_PYPY) || (defined(PyByteArray_AS_STRING) && defined(PyByteArray_GET_SIZE))
    if (PyByteArray_Check(o)) {
        *length = PyByteArray_GET_SIZE(o);
        return PyByteArray_AS_STRING(o);
    } else
#endif
    {
        char* result;
        int r = PyBytes_AsStringAndSize(o, &result, length);
        if (unlikely(r < 0)) {
            return NULL;
        } else {
            return result;
        }
    }
}
static CYTHON_INLINE int __Pyx_PyObject_IsTrue(PyObject* x) {
   int is_true = x == Py_True;
   if (is_true | (x == Py_False) | (x == Py_None)) return is_true;
   else return PyObject_IsTrue(x);
}
static CYTHON_INLINE int __Pyx_PyObject_IsTrueAndDecref(PyObject* x) {
    int retval;
    if (unlikely(!x)) return -1;
    retval = __Pyx_PyObject_IsTrue(x);
    Py_DECREF(x);
    return retval;
}
static PyObject* __Pyx_PyNumber_IntOrLongWrongResultType(PyObject* result, const char* type_name) {
#if PY_MAJOR_VERSION >= 3
    if (PyLong_Check(result)) {
        if (PyErr_WarnFormat(PyExc_DeprecationWarning, 1,
                "__int__ returned non-int (type %.200s).  "
                "The ability to return an instance of a strict subclass of int "
                "is deprecated, and may be removed in a future version of Python.",
                Py_TYPE(result)->tp_name)) {
            Py_DECREF(result);
            return NULL;
        }
        return result;
    }
#endif
    PyErr_Format(PyExc_TypeError,
                 "__%.4s__ returned non-%.4s (type %.200s)",
                 type_name, type_name, Py_TYPE(result)->tp_name);
    Py_DECREF(result);
    return NULL;
}
static CYTHON_INLINE PyObject* __Pyx_PyNumber_IntOrLong(PyObject* x) {
#if CYTHON_USE_TYPE_SLOTS
  PyNumberMethods *m;
#endif
  const char *name = NULL;
  PyObject *res = NULL;
#if PY_MAJOR_VERSION < 3
  if (likely(PyInt_Check(x) || PyLong_Check(x)))
#else
  if (likely(PyLong_Check(x)))
#endif
    return __Pyx_NewRef(x);
#if CYTHON_USE_TYPE_SLOTS
  m = Py_TYPE(x)->tp_as_number;
  #if PY_MAJOR_VERSION < 3
  if (m && m->nb_int) {
    name = "int";
    res = m->nb_int(x);
  }
  else if (m && m->nb_long) {
    name = "long";
    res = m->nb_long(x);
  }
  #else
  if (likely(m && m->nb_int)) {
    name = "int";
    res = m->nb_int(x);
  }
  #endif
#else
  if (!PyBytes_CheckExact(x) && !PyUnicode_CheckExact(x)) {
    res = PyNumber_Int(x);
  }
#endif
  if (likely(res)) {
#if PY_MAJOR_VERSION < 3
    if (unlikely(!PyInt_Check(res) && !PyLong_Check(res))) {
#else
    if (unlikely(!PyLong_CheckExact(res))) {
#endif
        return __Pyx_PyNumber_IntOrLongWrongResultType(res, name);
    }
  }
  else if (!PyErr_Occurred()) {
    PyErr_SetString(PyExc_TypeError,
                    "an integer is required");
  }
  return res;
}
static CYTHON_INLINE Py_ssize_t __Pyx_PyIndex_AsSsize_t(PyObject* b) {
  Py_ssize_t ival;
  PyObject *x;
#if PY_MAJOR_VERSION < 3
  if (likely(PyInt_CheckExact(b))) {
    if (sizeof(Py_ssize_t) >= sizeof(long))
        return PyInt_AS_LONG(b);
    else
        return PyInt_AsSsize_t(b);
  }
#endif
  if (likely(PyLong_CheckExact(b))) {
    #if CYTHON_USE_PYLONG_INTERNALS
    const digit* digits = ((PyLongObject*)b)->ob_digit;
    const Py_ssize_t size = Py_SIZE(b);
    if (likely(__Pyx_sst_abs(size) <= 1)) {
        ival = likely(size) ? digits[0] : 0;
        if (size == -1) ival = -ival;
        return ival;
    } else {
      switch (size) {
         case 2:
           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
             return (Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
           }
           break;
         case -2:
           if (8 * sizeof(Py_ssize_t) > 2 * PyLong_SHIFT) {
             return -(Py_ssize_t) (((((size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
           }
           break;
         case 3:
           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
             return (Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
           }
           break;
         case -3:
           if (8 * sizeof(Py_ssize_t) > 3 * PyLong_SHIFT) {
             return -(Py_ssize_t) (((((((size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
           }
           break;
         case 4:
           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
             return (Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
           }
           break;
         case -4:
           if (8 * sizeof(Py_ssize_t) > 4 * PyLong_SHIFT) {
             return -(Py_ssize_t) (((((((((size_t)digits[3]) << PyLong_SHIFT) | (size_t)digits[2]) << PyLong_SHIFT) | (size_t)digits[1]) << PyLong_SHIFT) | (size_t)digits[0]));
           }
           break;
      }
    }
    #endif
    return PyLong_AsSsize_t(b);
  }
  x = PyNumber_Index(b);
  if (!x) return -1;
  ival = PyInt_AsSsize_t(x);
  Py_DECREF(x);
  return ival;
}
static CYTHON_INLINE PyObject * __Pyx_PyBool_FromLong(long b) {
  return b ? __Pyx_NewRef(Py_True) : __Pyx_NewRef(Py_False);
}
static CYTHON_INLINE PyObject * __Pyx_PyInt_FromSize_t(size_t ival) {
    return PyInt_FromSize_t(ival);
}


#endif /* Py_PYTHON_H */
