prelude.h

//     Copyright 2025, Kay Hayen, mailto:kay.hayen@gmail.com find license text at end of file
 
#ifndef __NUITKA_PRELUDE_H__
#define __NUITKA_PRELUDE_H__
 
#ifdef __NUITKA_NO_ASSERT__
#undef NDEBUG
#define NDEBUG
#endif
 
#include "nuitka/debug_settings.h"
 
#if defined(_WIN32)
// Note: Keep this separate line, must be included before other Windows headers.
#include <windows.h>
#endif
 
/* Include the CPython version numbers, and define our own take of what version
 * numbers should be.
 */
#include <patchlevel.h>
 
/* Use a hex version of our own to compare for versions. We do not care about pre-releases */
#if PY_MICRO_VERSION < 16
#define PYTHON_VERSION (PY_MAJOR_VERSION * 256 + PY_MINOR_VERSION * 16 + PY_MICRO_VERSION)
#else
#define PYTHON_VERSION (PY_MAJOR_VERSION * 256 + PY_MINOR_VERSION * 16 + 15)
#endif
 
/* This is needed or else we can't create modules name "proc" or "func". For
 * Python3, the name collision can't happen, so we can limit it to Python2.
   spell-checker: ignore initproc,initfunc
 */
#define initproc python_init_proc
#define initfunc python_init_func
#define initstate python_initstate
 
// Python 3.11 headers give these warnings
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable : 4200)
#pragma warning(disable : 4244)
#endif
 
/* Include the relevant Python C-API header files. */
#include <Python.h>
#include <frameobject.h>
#include <marshal.h>
#include <methodobject.h>
#include <osdefs.h>
#include <structseq.h>
 
#if PYTHON_VERSION < 0x3a0
#include <pydebug.h>
#endif
 
/* A way to not give warnings about things that are declared, but might not
 * be used like in-line helper functions in headers or static per module
 * variables from headers.
 */
#ifdef __GNUC__
#define NUITKA_MAY_BE_UNUSED __attribute__((__unused__))
#else
#define NUITKA_MAY_BE_UNUSED
#endif
 
// We are not following the 3.10 change to an inline function. At least
// not immediately.
#if PYTHON_VERSION >= 0x3a0 && PYTHON_VERSION < 0x3c0
#undef Py_REFCNT
#define Py_REFCNT(ob) (_PyObject_CAST(ob)->ob_refcnt)
#endif
 
// We are using this new macro on old code too.
#ifndef Py_SET_REFCNT
#define Py_SET_REFCNT(ob, refcnt) Py_REFCNT(ob) = refcnt
#endif
 
#if defined(_WIN32)
// Windows is too difficult for API redefines.
#define MIN_PYCORE_PYTHON_VERSION 0x380
#else
#define MIN_PYCORE_PYTHON_VERSION 0x371
#endif
 
#if PYTHON_VERSION >= MIN_PYCORE_PYTHON_VERSION
#define NUITKA_USE_PYCORE_THREAD_STATE
#endif
 
#ifdef NUITKA_USE_PYCORE_THREAD_STATE
#undef Py_BUILD_CORE
#define Py_BUILD_CORE
#undef _PyGC_FINALIZED
 
#if PYTHON_VERSION < 0x380
#undef Py_ATOMIC_H
#include <pyatomic.h>
#undef Py_INTERNAL_PYSTATE_H
#include <internal/pystate.h>
#undef Py_STATE_H
#include <pystate.h>
 
extern _PyRuntimeState _PyRuntime;
#else
 
#if PYTHON_VERSION >= 0x3c0
#include <internal/pycore_runtime.h>
#include <internal/pycore_typevarobject.h>
 
static inline size_t Nuitka_static_builtin_index_get(PyTypeObject *self) { return (size_t)self->tp_subclasses - 1; }
 
// Changed internal type access for Python3.13
#if PYTHON_VERSION < 0x3d0
#define managed_static_type_state static_builtin_state
 
static inline managed_static_type_state *Nuitka_static_builtin_state_get(PyInterpreterState *interp,
                                                                         PyTypeObject *self) {
    return &(interp->types.builtins[Nuitka_static_builtin_index_get(self)]);
}
#else
static inline managed_static_type_state *Nuitka_static_builtin_state_get(PyInterpreterState *interp,
                                                                         PyTypeObject *self) {
    return &(interp->types.builtins.initialized[Nuitka_static_builtin_index_get(self)]);
}
#endif
 
NUITKA_MAY_BE_UNUSED static inline managed_static_type_state *Nuitka_PyStaticType_GetState(PyInterpreterState *interp,
                                                                                           PyTypeObject *self) {
    assert(self->tp_flags & _Py_TPFLAGS_STATIC_BUILTIN);
    return Nuitka_static_builtin_state_get(interp, self);
}
 
#define _PyStaticType_GetState(interp, self) Nuitka_PyStaticType_GetState(interp, self)
#endif
 
#include <internal/pycore_pystate.h>
#endif
 
#if PYTHON_VERSION >= 0x390
#include <internal/pycore_ceval.h>
#include <internal/pycore_interp.h>
#include <internal/pycore_runtime.h>
#endif
 
#if PYTHON_VERSION >= 0x380
#include <cpython/initconfig.h>
#include <internal/pycore_initconfig.h>
#include <internal/pycore_pathconfig.h>
#include <internal/pycore_pyerrors.h>
#endif
 
#if PYTHON_VERSION >= 0x3a0
#include <internal/pycore_long.h>
#include <internal/pycore_unionobject.h>
#endif
 
#if PYTHON_VERSION >= 0x3b0
#include <internal/pycore_dict.h>
#include <internal/pycore_frame.h>
#include <internal/pycore_gc.h>
#endif
 
// Uncompiled generator integration requires these.
#if PYTHON_VERSION >= 0x3b0
#if PYTHON_VERSION >= 0x3d0
#include <internal/pycore_opcode_utils.h>
#include <opcode_ids.h>
#else
#include <internal/pycore_opcode.h>
#endif
// Clashes with our helper names.
#undef CALL_FUNCTION
#endif
 
#if PYTHON_VERSION >= 0x3c0
#include <cpython/code.h>
#endif
 
#if PYTHON_VERSION < 0x3c0
// Make sure we go the really fast variant, spell-checker: ignore gilstate
#undef PyThreadState_GET
#define _PyThreadState_Current _PyRuntime.gilstate.tstate_current
#define PyThreadState_GET() ((PyThreadState *)_Py_atomic_load_relaxed(&_PyThreadState_Current))
#endif
 
#if PYTHON_VERSION >= 0x380
#undef _PyObject_LookupSpecial
#include <internal/pycore_object.h>
#else
#include <objimpl.h>
#endif
 
#if PYTHON_VERSION >= 0x3d0
#include <internal/pycore_critical_section.h>
#include <internal/pycore_freelist.h>
#include <internal/pycore_intrinsics.h>
#include <internal/pycore_modsupport.h>
#include <internal/pycore_parking_lot.h>
#include <internal/pycore_pyatomic_ft_wrappers.h>
#include <internal/pycore_setobject.h>
#include <internal/pycore_time.h>
#endif
 
#if PYTHON_VERSION >= 0x3e0
#include <internal/pycore_interpframe.h>
#include <internal/pycore_tuple.h>
#include <internal/pycore_typedefs.h>
#include <internal/pycore_unicodeobject.h>
#endif
 
#undef Py_BUILD_CORE
 
#endif
 
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
 
/* See above. */
#if PYTHON_VERSION < 0x300
#undef initproc
#undef initfunc
#undef initstate
#endif
 
/* Type bool */
#ifndef __cplusplus
#include <stdbool.h>
#endif
 
/* Include the C header files most often used. */
#include <stdio.h>
 
#include "hedley.h"
 
/* Use annotations for branch prediction. They still make sense as the L1
 * cache space is saved.
 */
 
#define likely(x) HEDLEY_LIKELY(x)
#define unlikely(x) HEDLEY_UNLIKELY(x)
 
/* A way to indicate that a specific function won't return, so the C compiler
 * can create better code.
 */
 
#define NUITKA_NO_RETURN HEDLEY_NO_RETURN
 
/* This is used to indicate code control flows we know cannot happen. */
#ifndef __NUITKA_NO_ASSERT__
#define NUITKA_CANNOT_GET_HERE(NAME)                                                                                   \
    PRINT_FORMAT("%s : %s\n", __FUNCTION__, #NAME);                                                                    \
    abort();
#else
#define NUITKA_CANNOT_GET_HERE(NAME) abort();
#endif
 
#define NUITKA_ERROR_EXIT(NAME)                                                                                        \
    PRINT_FORMAT("%s : %s\n", __FUNCTION__, #NAME);                                                                    \
    abort();
 
#if defined(_MSC_VER)
/* Using "_alloca" extension due to MSVC restrictions for array variables
 * on the local stack.
 */
#include <malloc.h>
#define NUITKA_DYNAMIC_ARRAY_DECL(VARIABLE_NAME, ELEMENT_TYPE, COUNT)                                                  \
    ELEMENT_TYPE *VARIABLE_NAME = (ELEMENT_TYPE *)_alloca(sizeof(ELEMENT_TYPE) * (COUNT));
#else
#define NUITKA_DYNAMIC_ARRAY_DECL(VARIABLE_NAME, ELEMENT_TYPE, COUNT) ELEMENT_TYPE VARIABLE_NAME[COUNT];
#endif
 
/* Python3 removed PyInt instead of renaming PyLong, and PyObject_Str instead
 * of renaming PyObject_Unicode. Define this to be easily portable.
 */
#if PYTHON_VERSION >= 0x300
#define PyInt_AsLong PyLong_AsLong
#define PyInt_FromSsize_t PyLong_FromSsize_t
 
#define PyNumber_Int PyNumber_Long
 
#define PyObject_Unicode PyObject_Str
 
#endif
 
/* String handling that uses the proper version of strings for Python3 or not,
 * which makes it easier to write portable code.
 */
#if PYTHON_VERSION < 0x300
#define PyUnicode_GET_LENGTH(x) (PyUnicode_GET_SIZE(x))
#define Nuitka_String_AsString PyString_AsString
#define Nuitka_String_AsString_Unchecked PyString_AS_STRING
#define Nuitka_String_Check PyString_Check
#define Nuitka_String_CheckExact PyString_CheckExact
NUITKA_MAY_BE_UNUSED static inline bool Nuitka_StringOrUnicode_CheckExact(PyObject *value) {
    return PyString_CheckExact(value) || PyUnicode_CheckExact(value);
}
#define Nuitka_StringObject PyStringObject
#define Nuitka_String_FromString PyString_FromString
#define Nuitka_String_FromStringAndSize PyString_FromStringAndSize
#define Nuitka_String_FromFormat PyString_FromFormat
#define PyUnicode_CHECK_INTERNED (0)
NUITKA_MAY_BE_UNUSED static Py_UNICODE *Nuitka_UnicodeAsWideString(PyObject *str, Py_ssize_t *size) {
    PyObject *unicode;
 
    if (!PyUnicode_Check(str)) {
        // Leaking memory, but for usages its acceptable to
        // achieve that the pointer remains valid.
        unicode = PyObject_Unicode(str);
    } else {
        unicode = str;
    }
 
    if (size != NULL) {
        *size = (Py_ssize_t)PyUnicode_GET_LENGTH(unicode);
    }
 
    return PyUnicode_AsUnicode(unicode);
}
#else
#define Nuitka_String_AsString _PyUnicode_AsString
 
// Note: This private stuff from file "Objects/unicodeobject.c"
// spell-checker: ignore unicodeobject
#define _PyUnicode_UTF8(op) (((PyCompactUnicodeObject *)(op))->utf8)
#define PyUnicode_UTF8(op)                                                                                             \
    (assert(PyUnicode_IS_READY(op)),                                                                                   \
     PyUnicode_IS_COMPACT_ASCII(op) ? ((char *)((PyASCIIObject *)(op) + 1)) : _PyUnicode_UTF8(op))
#ifdef __NUITKA_NO_ASSERT__
#define Nuitka_String_AsString_Unchecked PyUnicode_UTF8
#else
NUITKA_MAY_BE_UNUSED static char const *Nuitka_String_AsString_Unchecked(PyObject *object) {
    char const *result = PyUnicode_UTF8(object);
    assert(result != NULL);
    return result;
}
#endif
#define Nuitka_String_Check PyUnicode_Check
#define Nuitka_String_CheckExact PyUnicode_CheckExact
#define Nuitka_StringOrUnicode_CheckExact PyUnicode_CheckExact
#define Nuitka_StringObject PyUnicodeObject
#define Nuitka_String_FromString PyUnicode_FromString
#define Nuitka_String_FromStringAndSize PyUnicode_FromStringAndSize
#define Nuitka_String_FromFormat PyUnicode_FromFormat
#define Nuitka_UnicodeAsWideString PyUnicode_AsWideCharString
#endif
 
// Wrap the type lookup for debug mode, to identify errors, and potentially
// to make our own enhancement later on. For now only verify it is not being
// called with an error set, which 3.9 asserts against in core code.
#ifdef __NUITKA_NO_ASSERT__
#define Nuitka_TypeLookup(x, y) _PyType_Lookup(x, y)
#else
NUITKA_MAY_BE_UNUSED static PyObject *Nuitka_TypeLookup(PyTypeObject *type, PyObject *name) {
    return _PyType_Lookup(type, name);
}
 
#endif
 
/* With the idea to reduce the amount of exported symbols in the DLLs, make it
 * clear that the module "init" function should of course be exported, but not
 * for executable, where we call it ourselves from the main code.
 */
 
#if PYTHON_VERSION < 0x300
#define NUITKA_MODULE_ENTRY_FUNCTION void
#else
#define NUITKA_MODULE_ENTRY_FUNCTION PyObject *
#endif
 
#if PYTHON_VERSION < 0x300
typedef long Py_hash_t;
#endif
 
/* These two express if a directly called function should be exported (C level)
 * or if it can be local to the file.
 */
#define NUITKA_CROSS_MODULE
#define NUITKA_LOCAL_MODULE static
 
/* Due to ABI issues, it seems that on Windows the symbols used by
 * "_PyObject_GC_TRACK" were not exported before 3.8 and we need to use a
 * function that does it instead.
 *
 * The Python 3.7.0 release on at Linux doesn't work this way either, was
 * a bad CPython release apparently and between 3.7.3 and 3.7.4 these have
 * become runtime incompatible.
 */
#if (defined(_WIN32) || defined(__MSYS__)) && PYTHON_VERSION < 0x380
#define Nuitka_GC_Track PyObject_GC_Track
#define Nuitka_GC_UnTrack PyObject_GC_UnTrack
#undef _PyObject_GC_TRACK
#undef _PyObject_GC_UNTRACK
#elif PYTHON_VERSION == 0x370
#define Nuitka_GC_Track PyObject_GC_Track
#define Nuitka_GC_UnTrack PyObject_GC_UnTrack
#undef _PyObject_GC_TRACK
#undef _PyObject_GC_UNTRACK
#elif _NUITKA_MODULE_MODE && PYTHON_VERSION >= 0x370 && PYTHON_VERSION < 0x380
#define Nuitka_GC_Track PyObject_GC_Track
#define Nuitka_GC_UnTrack PyObject_GC_UnTrack
#undef _PyObject_GC_TRACK
#undef _PyObject_GC_UNTRACK
#undef PyThreadState_GET
#define PyThreadState_GET PyThreadState_Get
#else
#define Nuitka_GC_Track _PyObject_GC_TRACK
#define Nuitka_GC_UnTrack _PyObject_GC_UNTRACK
#endif
 
#if _NUITKA_EXPERIMENTAL_FAST_THREAD_GET && PYTHON_VERSION >= 0x300 && PYTHON_VERSION < 0x370
// We are careful, access without locking under the assumption that we hold
// the GIL over uses of this or the same thread continues to execute code of
// ours.
#undef PyThreadState_GET
extern PyThreadState *_PyThreadState_Current;
#define PyThreadState_GET() (_PyThreadState_Current)
#endif
 
#ifndef _NUITKA_FULL_COMPAT
// Remove useless recursion control guards, except for testing mode, we do not
// want them and we have no need for them as we are achieving deeper recursion
// anyway.
#undef Py_EnterRecursiveCall
#define Py_EnterRecursiveCall(arg) (0)
#undef Py_LeaveRecursiveCall
#define Py_LeaveRecursiveCall()
#endif
 
#if PYTHON_VERSION < 0x300
#define TP_RICHCOMPARE(t) (PyType_HasFeature((t), Py_TPFLAGS_HAVE_RICHCOMPARE) ? (t)->tp_richcompare : NULL)
#else
#define TP_RICHCOMPARE(t) ((t)->tp_richcompare)
#endif
 
// For older Python we need to define this ourselves.
#ifndef Py_ABS
#define Py_ABS(x) ((x) < 0 ? -(x) : (x))
#endif
 
#ifndef Py_MIN
#define Py_MIN(x, y) (((x) > (y)) ? (y) : (x))
#endif
 
#ifndef Py_MAX
#define Py_MAX(x, y) (((x) > (y)) ? (x) : (y))
#endif
 
#ifndef Py_SET_SIZE
#define Py_SET_SIZE(op, size) ((PyVarObject *)(op))->ob_size = size
#endif
 
#ifndef PyFloat_SET_DOUBLE
#define PyFloat_SET_DOUBLE(op, value) ((PyFloatObject *)(op))->ob_fval = value
#endif
 
#ifndef Py_NewRef
static inline PyObject *_Py_NewRef(PyObject *obj) {
    Py_INCREF(obj);
    return obj;
}
 
static inline PyObject *_Py_XNewRef(PyObject *obj) {
    Py_XINCREF(obj);
    return obj;
}
 
#define Py_NewRef(obj) _Py_NewRef((PyObject *)(obj))
#define Py_XNewRef(obj) _Py_XNewRef((PyObject *)(obj))
#endif
 
// For older Python, we don't have a feature "CLASS" anymore, that's implied now.
#if PYTHON_VERSION < 0x300
#define NuitkaType_HasFeatureClass(descr) (PyType_HasFeature(Py_TYPE(descr), Py_TPFLAGS_HAVE_CLASS))
#else
#define NuitkaType_HasFeatureClass(descr) (1)
#endif
 
// For pre-3.13, lets allow ourselves to use them as well, these do play
// nice with no-GIL Python.
#if PYTHON_VERSION < 0x3d0
#define FT_ATOMIC_LOAD_PTR(value) value
#define FT_ATOMIC_STORE_PTR(value, new_value) value = new_value
#define FT_ATOMIC_LOAD_SSIZE(value) value
#define FT_ATOMIC_LOAD_SSIZE_ACQUIRE(value) value
#define FT_ATOMIC_LOAD_SSIZE_RELAXED(value) value
#define FT_ATOMIC_STORE_PTR(value, new_value) value = new_value
#define FT_ATOMIC_LOAD_PTR_ACQUIRE(value) value
#define FT_ATOMIC_LOAD_UINTPTR_ACQUIRE(value) value
#define FT_ATOMIC_LOAD_PTR_RELAXED(value) value
#define FT_ATOMIC_LOAD_UINT8(value) value
#define FT_ATOMIC_STORE_UINT8(value, new_value) value = new_value
#define FT_ATOMIC_LOAD_UINT8_RELAXED(value) value
#define FT_ATOMIC_LOAD_UINT16_RELAXED(value) value
#define FT_ATOMIC_LOAD_UINT32_RELAXED(value) value
#define FT_ATOMIC_LOAD_ULONG_RELAXED(value) value
#define FT_ATOMIC_STORE_PTR_RELAXED(value, new_value) value = new_value
#define FT_ATOMIC_STORE_PTR_RELEASE(value, new_value) value = new_value
#define FT_ATOMIC_STORE_UINTPTR_RELEASE(value, new_value) value = new_value
#define FT_ATOMIC_STORE_SSIZE_RELAXED(value, new_value) value = new_value
#define FT_ATOMIC_STORE_UINT8_RELAXED(value, new_value) value = new_value
#define FT_ATOMIC_STORE_UINT16_RELAXED(value, new_value) value = new_value
#define FT_ATOMIC_STORE_UINT32_RELAXED(value, new_value) value = new_value
 
#define Py_BEGIN_CRITICAL_SECTION(mut) {
#define Py_BEGIN_CRITICAL_SECTION2(m1, m2) {
#define Py_BEGIN_CRITICAL_SECTION_MUT(mut) {
#define Py_BEGIN_CRITICAL_SECTION2_MUT(m1, m2) {
#define Py_END_CRITICAL_SECTION() }
 
#define Py_BEGIN_CRITICAL_SECTION_SEQUENCE_FAST(original) {
#define Py_END_CRITICAL_SECTION_SEQUENCE_FAST() }
#define _Py_CRITICAL_SECTION_ASSERT_MUTEX_LOCKED(mutex)
#define _Py_CRITICAL_SECTION_ASSERT_OBJECT_LOCKED(op)
 
#endif
 
// Our replacement for "PyType_IsSubtype"
extern bool Nuitka_Type_IsSubtype(PyTypeObject *a, PyTypeObject *b);
 
#include "nuitka/allocator.h"
#include "nuitka/exceptions.h"
 
// The digit types
#if PYTHON_VERSION < 0x300
#include <longintrepr.h>
 
#if PYTHON_VERSION < 0x270
// Not present in Python2.6 yet, spell-checker: ignore sdigit
typedef signed int sdigit;
#endif
#endif
 
// A long value that represents a signed digit on the helper interface.
typedef long nuitka_digit;
 
#include "nuitka/helpers.h"
 
#include "nuitka/compiled_frame.h"
 
#include "nuitka/compiled_cell.h"
 
#include "nuitka/compiled_function.h"
 
/* Sentinel PyObject to be used for all our call iterator endings. */
extern PyObject *Nuitka_sentinel_value;
 
/* Value to use for __compiled__ value of all modules. */
extern PyObject *Nuitka_dunder_compiled_value;
 
#include "nuitka/compiled_generator.h"
 
#include "nuitka/compiled_method.h"
 
#if PYTHON_VERSION >= 0x350
#include "nuitka/compiled_coroutine.h"
#endif
 
#if PYTHON_VERSION >= 0x360
#include "nuitka/compiled_asyncgen.h"
#endif
 
#include "nuitka/filesystem_paths.h"
#include "nuitka/safe_string_ops.h"
 
#include "nuitka/jit_sources.h"
 
#if _NUITKA_EXPERIMENTAL_WRITEABLE_CONSTANTS
#include "nuitka_data_decoder.h"
#else
#define DECODE(x) assert(x)
#define UN_TRANSLATE(x) (x)
#endif
 
#if _NUITKA_EXPERIMENTAL_FILE_TRACING
#include "nuitka_file_tracer.h"
#else
#if PYTHON_VERSION < 0x300
#define TRACE_FILE_OPEN(tstate, x, y, z, r) (false)
#else
#define TRACE_FILE_OPEN(tstate, x, y, z, a, b, c, d, e, r) (false)
#endif
#define TRACE_FILE_READ(tstate, x, y) (false)
 
#define TRACE_FILE_EXISTS(tstate, x, y) (false)
#define TRACE_FILE_ISFILE(tstate, x, y) (false)
#define TRACE_FILE_ISDIR(tstate, x, y) (false)
 
#define TRACE_FILE_LISTDIR(tstate, x, y) (false)
 
#define TRACE_FILE_STAT(tstate, x, y, z, r) (false)
 
#endif
 
#if _NUITKA_EXPERIMENTAL_INIT_PROGRAM
#include "nuitka_init_program.h"
#else
#define NUITKA_INIT_PROGRAM_EARLY(argc, argv)
#define NUITKA_INIT_PROGRAM_LATE(module_name)
#endif
 
#if _NUITKA_EXPERIMENTAL_EXIT_PROGRAM
#include "nuitka_exit_program.h"
#else
#define NUITKA_FINALIZE_PROGRAM(tstate)
#endif
 
// Only Python3.9+ has a more precise check, while making the old one slow.
#ifndef PyCFunction_CheckExact
#define PyCFunction_CheckExact PyCFunction_Check
#endif
 
#ifdef _NUITKA_EXPERIMENTAL_DUMP_C_TRACEBACKS
extern void INIT_C_BACKTRACES(void);
extern void DUMP_C_BACKTRACE(void);
#endif
 
#if _NUITKA_PLUGIN_THEMIDA_ENABLED
#include "nuitka_themida.h"
#endif
 
#endif
 
//     Part of "Nuitka", an optimizing Python compiler that is compatible and
//     integrates with CPython, but also works on its own.
//
//     Licensed under the Apache License, Version 2.0 (the "License");
//     you may not use this file except in compliance with the License.
//     You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//     Unless required by applicable law or agreed to in writing, software
//     distributed under the License is distributed on an "AS IS" BASIS,
//     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//     See the License for the specific language governing permissions and
//     limitations under the License.