fix ya.make

1 files changed, 0 insertions, 2470 deletions

diff --git a/contrib/tools/python3/src/Modules/_struct.c b/contrib/tools/python3/src/Modules/_struct.c
deleted file mode 100644
index 30ad9f2b79d..00000000000
--- a/contrib/tools/python3/src/Modules/_struct.c
+++ /dev/null
@@ -1,2470 +0,0 @@
-/* struct module -- pack values into and (out of) bytes objects */
-
-/* New version supporting byte order, alignment and size options,
-   character strings, and unsigned numbers */
-
-#define PY_SSIZE_T_CLEAN
-
-#include "Python.h"
-#include "pycore_moduleobject.h"  // _PyModule_GetState()
-#include "structmember.h"         // PyMemberDef
-#include <ctype.h>
-
-/*[clinic input]
-class Struct "PyStructObject *" "&PyStructType"
-[clinic start generated code]*/
-/*[clinic end generated code: output=da39a3ee5e6b4b0d input=9b032058a83ed7c3]*/
-
-typedef struct {
-    PyObject *cache;
-    PyObject *PyStructType;
-    PyObject *unpackiter_type;
-    PyObject *StructError;
-} _structmodulestate;
-
-static inline _structmodulestate*
-get_struct_state(PyObject *module)
-{
-    void *state = _PyModule_GetState(module);
-    assert(state != NULL);
-    return (_structmodulestate *)state;
-}
-
-static struct PyModuleDef _structmodule;
-
-#define get_struct_state_structinst(self) \
-    (get_struct_state(_PyType_GetModuleByDef(Py_TYPE(self), &_structmodule)))
-#define get_struct_state_iterinst(self) \
-    (get_struct_state(PyType_GetModule(Py_TYPE(self))))
-
-/* The translation function for each format character is table driven */
-typedef struct _formatdef {
-    char format;
-    Py_ssize_t size;
-    Py_ssize_t alignment;
-    PyObject* (*unpack)(_structmodulestate *, const char *,
-                        const struct _formatdef *);
-    int (*pack)(_structmodulestate *, char *, PyObject *,
-                const struct _formatdef *);
-} formatdef;
-
-typedef struct _formatcode {
-    const struct _formatdef *fmtdef;
-    Py_ssize_t offset;
-    Py_ssize_t size;
-    Py_ssize_t repeat;
-} formatcode;
-
-/* Struct object interface */
-
-typedef struct {
-    PyObject_HEAD
-    Py_ssize_t s_size;
-    Py_ssize_t s_len;
-    formatcode *s_codes;
-    PyObject *s_format;
-    PyObject *weakreflist; /* List of weak references */
-} PyStructObject;
-
-#define PyStruct_Check(op, state) PyObject_TypeCheck(op, (PyTypeObject *)(state)->PyStructType)
-
-/* Define various structs to figure out the alignments of types */
-
-
-typedef struct { char c; short x; } st_short;
-typedef struct { char c; int x; } st_int;
-typedef struct { char c; long x; } st_long;
-typedef struct { char c; float x; } st_float;
-typedef struct { char c; double x; } st_double;
-typedef struct { char c; void *x; } st_void_p;
-typedef struct { char c; size_t x; } st_size_t;
-typedef struct { char c; _Bool x; } st_bool;
-
-#define SHORT_ALIGN (sizeof(st_short) - sizeof(short))
-#define INT_ALIGN (sizeof(st_int) - sizeof(int))
-#define LONG_ALIGN (sizeof(st_long) - sizeof(long))
-#define FLOAT_ALIGN (sizeof(st_float) - sizeof(float))
-#define DOUBLE_ALIGN (sizeof(st_double) - sizeof(double))
-#define VOID_P_ALIGN (sizeof(st_void_p) - sizeof(void *))
-#define SIZE_T_ALIGN (sizeof(st_size_t) - sizeof(size_t))
-#define BOOL_ALIGN (sizeof(st_bool) - sizeof(_Bool))
-
-/* We can't support q and Q in native mode unless the compiler does;
-   in std mode, they're 8 bytes on all platforms. */
-typedef struct { char c; long long x; } s_long_long;
-#define LONG_LONG_ALIGN (sizeof(s_long_long) - sizeof(long long))
-
-#ifdef __powerc
-#pragma options align=reset
-#endif
-
-/*[python input]
-class cache_struct_converter(CConverter):
-    type = 'PyStructObject *'
-    converter = 'cache_struct_converter'
-    c_default = "NULL"
-
-    def parse_arg(self, argname, displayname):
-        return """
-            if (!{converter}(module, {argname}, &{paramname})) {{{{
-                goto exit;
-            }}}}
-            """.format(argname=argname, paramname=self.name,
-                       converter=self.converter)
-
-    def cleanup(self):
-        return "Py_XDECREF(%s);\n" % self.name
-[python start generated code]*/
-/*[python end generated code: output=da39a3ee5e6b4b0d input=d6746621c2fb1a7d]*/
-
-static int cache_struct_converter(PyObject *, PyObject *, PyStructObject **);
-
-#include "clinic/_struct.c.h"
-
-/* Helper for integer format codes: converts an arbitrary Python object to a
-   PyLongObject if possible, otherwise fails.  Caller should decref. */
-
-static PyObject *
-get_pylong(_structmodulestate *state, PyObject *v)
-{
-    assert(v != NULL);
-    if (!PyLong_Check(v)) {
-        /* Not an integer;  try to use __index__ to convert. */
-        if (PyIndex_Check(v)) {
-            v = _PyNumber_Index(v);
-            if (v == NULL)
-                return NULL;
-        }
-        else {
-            PyErr_SetString(state->StructError,
-                            "required argument is not an integer");
-            return NULL;
-        }
-    }
-    else
-        Py_INCREF(v);
-
-    assert(PyLong_Check(v));
-    return v;
-}
-
-/* Helper routine to get a C long and raise the appropriate error if it isn't
-   one */
-
-static int
-get_long(_structmodulestate *state, PyObject *v, long *p)
-{
-    long x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsLong(v);
-    Py_DECREF(v);
-    if (x == (long)-1 && PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_OverflowError))
-            PyErr_SetString(state->StructError,
-                            "argument out of range");
-        return -1;
-    }
-    *p = x;
-    return 0;
-}
-
-
-/* Same, but handling unsigned long */
-
-static int
-get_ulong(_structmodulestate *state, PyObject *v, unsigned long *p)
-{
-    unsigned long x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsUnsignedLong(v);
-    Py_DECREF(v);
-    if (x == (unsigned long)-1 && PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_OverflowError))
-            PyErr_SetString(state->StructError,
-                            "argument out of range");
-        return -1;
-    }
-    *p = x;
-    return 0;
-}
-
-/* Same, but handling native long long. */
-
-static int
-get_longlong(_structmodulestate *state, PyObject *v, long long *p)
-{
-    long long x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsLongLong(v);
-    Py_DECREF(v);
-    if (x == (long long)-1 && PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_OverflowError))
-            PyErr_SetString(state->StructError,
-                            "argument out of range");
-        return -1;
-    }
-    *p = x;
-    return 0;
-}
-
-/* Same, but handling native unsigned long long. */
-
-static int
-get_ulonglong(_structmodulestate *state, PyObject *v, unsigned long long *p)
-{
-    unsigned long long x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsUnsignedLongLong(v);
-    Py_DECREF(v);
-    if (x == (unsigned long long)-1 && PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_OverflowError))
-            PyErr_SetString(state->StructError,
-                            "argument out of range");
-        return -1;
-    }
-    *p = x;
-    return 0;
-}
-
-/* Same, but handling Py_ssize_t */
-
-static int
-get_ssize_t(_structmodulestate *state, PyObject *v, Py_ssize_t *p)
-{
-    Py_ssize_t x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsSsize_t(v);
-    Py_DECREF(v);
-    if (x == (Py_ssize_t)-1 && PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_OverflowError))
-            PyErr_SetString(state->StructError,
-                            "argument out of range");
-        return -1;
-    }
-    *p = x;
-    return 0;
-}
-
-/* Same, but handling size_t */
-
-static int
-get_size_t(_structmodulestate *state, PyObject *v, size_t *p)
-{
-    size_t x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsSize_t(v);
-    Py_DECREF(v);
-    if (x == (size_t)-1 && PyErr_Occurred()) {
-        if (PyErr_ExceptionMatches(PyExc_OverflowError))
-            PyErr_SetString(state->StructError,
-                            "argument out of range");
-        return -1;
-    }
-    *p = x;
-    return 0;
-}
-
-
-#define RANGE_ERROR(state, x, f, flag, mask) return _range_error(state, f, flag)
-
-
-/* Floating point helpers */
-
-static PyObject *
-unpack_halffloat(const char *p,  /* start of 2-byte string */
-                 int le)         /* true for little-endian, false for big-endian */
-{
-    double x;
-
-    x = _PyFloat_Unpack2((unsigned char *)p, le);
-    if (x == -1.0 && PyErr_Occurred()) {
-        return NULL;
-    }
-    return PyFloat_FromDouble(x);
-}
-
-static int
-pack_halffloat(_structmodulestate *state,
-               char *p,      /* start of 2-byte string */
-               PyObject *v,  /* value to pack */
-               int le)       /* true for little-endian, false for big-endian */
-{
-    double x = PyFloat_AsDouble(v);
-    if (x == -1.0 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    return _PyFloat_Pack2(x, (unsigned char *)p, le);
-}
-
-static PyObject *
-unpack_float(const char *p,  /* start of 4-byte string */
-         int le)             /* true for little-endian, false for big-endian */
-{
-    double x;
-
-    x = _PyFloat_Unpack4((unsigned char *)p, le);
-    if (x == -1.0 && PyErr_Occurred())
-        return NULL;
-    return PyFloat_FromDouble(x);
-}
-
-static PyObject *
-unpack_double(const char *p,  /* start of 8-byte string */
-          int le)         /* true for little-endian, false for big-endian */
-{
-    double x;
-
-    x = _PyFloat_Unpack8((unsigned char *)p, le);
-    if (x == -1.0 && PyErr_Occurred())
-        return NULL;
-    return PyFloat_FromDouble(x);
-}
-
-/* Helper to format the range error exceptions */
-static int
-_range_error(_structmodulestate *state, const formatdef *f, int is_unsigned)
-{
-    /* ulargest is the largest unsigned value with f->size bytes.
-     * Note that the simpler:
-     *     ((size_t)1 << (f->size * 8)) - 1
-     * doesn't work when f->size == sizeof(size_t) because C doesn't
-     * define what happens when a left shift count is >= the number of
-     * bits in the integer being shifted; e.g., on some boxes it doesn't
-     * shift at all when they're equal.
-     */
-    const size_t ulargest = (size_t)-1 >> ((SIZEOF_SIZE_T - f->size)*8);
-    assert(f->size >= 1 && f->size <= SIZEOF_SIZE_T);
-    if (is_unsigned)
-        PyErr_Format(state->StructError,
-            "'%c' format requires 0 <= number <= %zu",
-            f->format,
-            ulargest);
-    else {
-        const Py_ssize_t largest = (Py_ssize_t)(ulargest >> 1);
-        PyErr_Format(state->StructError,
-            "'%c' format requires %zd <= number <= %zd",
-            f->format,
-            ~ largest,
-            largest);
-    }
-
-    return -1;
-}
-
-
-
-/* A large number of small routines follow, with names of the form
-
-   [bln][up]_TYPE
-
-   [bln] distinguishes among big-endian, little-endian and native.
-   [pu] distinguishes between pack (to struct) and unpack (from struct).
-   TYPE is one of char, byte, ubyte, etc.
-*/
-
-/* Native mode routines. ****************************************************/
-/* NOTE:
-   In all n[up]_<type> routines handling types larger than 1 byte, there is
-   *no* guarantee that the p pointer is properly aligned for each type,
-   therefore memcpy is called.  An intermediate variable is used to
-   compensate for big-endian architectures.
-   Normally both the intermediate variable and the memcpy call will be
-   skipped by C optimisation in little-endian architectures (gcc >= 2.91
-   does this). */
-
-static PyObject *
-nu_char(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return PyBytes_FromStringAndSize(p, 1);
-}
-
-static PyObject *
-nu_byte(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return PyLong_FromLong((long) *(signed char *)p);
-}
-
-static PyObject *
-nu_ubyte(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return PyLong_FromLong((long) *(unsigned char *)p);
-}
-
-static PyObject *
-nu_short(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    short x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromLong((long)x);
-}
-
-static PyObject *
-nu_ushort(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned short x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromLong((long)x);
-}
-
-static PyObject *
-nu_int(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    int x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromLong((long)x);
-}
-
-static PyObject *
-nu_uint(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned int x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromUnsignedLong((unsigned long)x);
-}
-
-static PyObject *
-nu_long(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    long x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromLong(x);
-}
-
-static PyObject *
-nu_ulong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned long x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromUnsignedLong(x);
-}
-
-static PyObject *
-nu_ssize_t(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    Py_ssize_t x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromSsize_t(x);
-}
-
-static PyObject *
-nu_size_t(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    size_t x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromSize_t(x);
-}
-
-static PyObject *
-nu_longlong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    long long x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromLongLong(x);
-}
-
-static PyObject *
-nu_ulonglong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned long long x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromUnsignedLongLong(x);
-}
-
-static PyObject *
-nu_bool(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    _Bool x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyBool_FromLong(x != 0);
-}
-
-
-static PyObject *
-nu_halffloat(_structmodulestate *state, const char *p, const formatdef *f)
-{
-#if PY_LITTLE_ENDIAN
-    return unpack_halffloat(p, 1);
-#else
-    return unpack_halffloat(p, 0);
-#endif
-}
-
-static PyObject *
-nu_float(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    float x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyFloat_FromDouble((double)x);
-}
-
-static PyObject *
-nu_double(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    double x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyFloat_FromDouble(x);
-}
-
-static PyObject *
-nu_void_p(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    void *x;
-    memcpy((char *)&x, p, sizeof x);
-    return PyLong_FromVoidPtr(x);
-}
-
-static int
-np_byte(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    if (x < -128 || x > 127) {
-        PyErr_SetString(state->StructError,
-                        "byte format requires -128 <= number <= 127");
-        return -1;
-    }
-    *p = (char)x;
-    return 0;
-}
-
-static int
-np_ubyte(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    if (x < 0 || x > 255) {
-        PyErr_SetString(state->StructError,
-                        "ubyte format requires 0 <= number <= 255");
-        return -1;
-    }
-    *(unsigned char *)p = (unsigned char)x;
-    return 0;
-}
-
-static int
-np_char(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    if (!PyBytes_Check(v) || PyBytes_Size(v) != 1) {
-        PyErr_SetString(state->StructError,
-                        "char format requires a bytes object of length 1");
-        return -1;
-    }
-    *p = *PyBytes_AS_STRING(v);
-    return 0;
-}
-
-static int
-np_short(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    short y;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    if (x < SHRT_MIN || x > SHRT_MAX) {
-        PyErr_SetString(state->StructError,
-                        "short format requires " Py_STRINGIFY(SHRT_MIN)
-                        " <= number <= " Py_STRINGIFY(SHRT_MAX));
-        return -1;
-    }
-    y = (short)x;
-    memcpy(p, (char *)&y, sizeof y);
-    return 0;
-}
-
-static int
-np_ushort(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    unsigned short y;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    if (x < 0 || x > USHRT_MAX) {
-        PyErr_SetString(state->StructError,
-                        "ushort format requires 0 <= number <= "
-                        Py_STRINGIFY(USHRT_MAX));
-        return -1;
-    }
-    y = (unsigned short)x;
-    memcpy(p, (char *)&y, sizeof y);
-    return 0;
-}
-
-static int
-np_int(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    int y;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-#if (SIZEOF_LONG > SIZEOF_INT)
-    if ((x < ((long)INT_MIN)) || (x > ((long)INT_MAX)))
-        RANGE_ERROR(state, x, f, 0, -1);
-#endif
-    y = (int)x;
-    memcpy(p, (char *)&y, sizeof y);
-    return 0;
-}
-
-static int
-np_uint(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    unsigned long x;
-    unsigned int y;
-    if (get_ulong(state, v, &x) < 0)
-        return -1;
-    y = (unsigned int)x;
-#if (SIZEOF_LONG > SIZEOF_INT)
-    if (x > ((unsigned long)UINT_MAX))
-        RANGE_ERROR(state, y, f, 1, -1);
-#endif
-    memcpy(p, (char *)&y, sizeof y);
-    return 0;
-}
-
-static int
-np_long(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_ulong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    unsigned long x;
-    if (get_ulong(state, v, &x) < 0)
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_ssize_t(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    Py_ssize_t x;
-    if (get_ssize_t(state, v, &x) < 0)
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_size_t(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    size_t x;
-    if (get_size_t(state, v, &x) < 0)
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_longlong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long long x;
-    if (get_longlong(state, v, &x) < 0)
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_ulonglong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    unsigned long long x;
-    if (get_ulonglong(state, v, &x) < 0)
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-
-static int
-np_bool(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    int y;
-    _Bool x;
-    y = PyObject_IsTrue(v);
-    if (y < 0)
-        return -1;
-    x = y;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_halffloat(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-#if PY_LITTLE_ENDIAN
-    return pack_halffloat(state, p, v, 1);
-#else
-    return pack_halffloat(state, p, v, 0);
-#endif
-}
-
-static int
-np_float(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    float x = (float)PyFloat_AsDouble(v);
-    if (x == -1 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static int
-np_double(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    double x = PyFloat_AsDouble(v);
-    if (x == -1 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    memcpy(p, (char *)&x, sizeof(double));
-    return 0;
-}
-
-static int
-np_void_p(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    void *x;
-
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    assert(PyLong_Check(v));
-    x = PyLong_AsVoidPtr(v);
-    Py_DECREF(v);
-    if (x == NULL && PyErr_Occurred())
-        return -1;
-    memcpy(p, (char *)&x, sizeof x);
-    return 0;
-}
-
-static const formatdef native_table[] = {
-    {'x',       sizeof(char),   0,              NULL},
-    {'b',       sizeof(char),   0,              nu_byte,        np_byte},
-    {'B',       sizeof(char),   0,              nu_ubyte,       np_ubyte},
-    {'c',       sizeof(char),   0,              nu_char,        np_char},
-    {'s',       sizeof(char),   0,              NULL},
-    {'p',       sizeof(char),   0,              NULL},
-    {'h',       sizeof(short),  SHORT_ALIGN,    nu_short,       np_short},
-    {'H',       sizeof(short),  SHORT_ALIGN,    nu_ushort,      np_ushort},
-    {'i',       sizeof(int),    INT_ALIGN,      nu_int,         np_int},
-    {'I',       sizeof(int),    INT_ALIGN,      nu_uint,        np_uint},
-    {'l',       sizeof(long),   LONG_ALIGN,     nu_long,        np_long},
-    {'L',       sizeof(long),   LONG_ALIGN,     nu_ulong,       np_ulong},
-    {'n',       sizeof(size_t), SIZE_T_ALIGN,   nu_ssize_t,     np_ssize_t},
-    {'N',       sizeof(size_t), SIZE_T_ALIGN,   nu_size_t,      np_size_t},
-    {'q',       sizeof(long long), LONG_LONG_ALIGN, nu_longlong, np_longlong},
-    {'Q',       sizeof(long long), LONG_LONG_ALIGN, nu_ulonglong,np_ulonglong},
-    {'?',       sizeof(_Bool),      BOOL_ALIGN,     nu_bool,        np_bool},
-    {'e',       sizeof(short),  SHORT_ALIGN,    nu_halffloat,   np_halffloat},
-    {'f',       sizeof(float),  FLOAT_ALIGN,    nu_float,       np_float},
-    {'d',       sizeof(double), DOUBLE_ALIGN,   nu_double,      np_double},
-    {'P',       sizeof(void *), VOID_P_ALIGN,   nu_void_p,      np_void_p},
-    {0}
-};
-
-/* Big-endian routines. *****************************************************/
-
-static PyObject *
-bu_int(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | *bytes++;
-    } while (--i > 0);
-    /* Extend the sign bit. */
-    if (SIZEOF_LONG > f->size)
-        x |= -(x & (1L << ((8 * f->size) - 1)));
-    return PyLong_FromLong(x);
-}
-
-static PyObject *
-bu_uint(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | *bytes++;
-    } while (--i > 0);
-    return PyLong_FromUnsignedLong(x);
-}
-
-static PyObject *
-bu_longlong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    long long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | *bytes++;
-    } while (--i > 0);
-    /* Extend the sign bit. */
-    if (SIZEOF_LONG_LONG > f->size)
-        x |= -(x & ((long long)1 << ((8 * f->size) - 1)));
-    return PyLong_FromLongLong(x);
-}
-
-static PyObject *
-bu_ulonglong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned long long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | *bytes++;
-    } while (--i > 0);
-    return PyLong_FromUnsignedLongLong(x);
-}
-
-static PyObject *
-bu_halffloat(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return unpack_halffloat(p, 0);
-}
-
-static PyObject *
-bu_float(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return unpack_float(p, 0);
-}
-
-static PyObject *
-bu_double(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return unpack_double(p, 0);
-}
-
-static PyObject *
-bu_bool(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return PyBool_FromLong(*p != 0);
-}
-
-static int
-bp_int(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    Py_ssize_t i;
-    unsigned char *q = (unsigned char *)p;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    i = f->size;
-    if (i != SIZEOF_LONG) {
-        if ((i == 2) && (x < -32768 || x > 32767))
-            RANGE_ERROR(state, x, f, 0, 0xffffL);
-#if (SIZEOF_LONG != 4)
-        else if ((i == 4) && (x < -2147483648L || x > 2147483647L))
-            RANGE_ERROR(state, x, f, 0, 0xffffffffL);
-#endif
-    }
-    do {
-        q[--i] = (unsigned char)(x & 0xffL);
-        x >>= 8;
-    } while (i > 0);
-    return 0;
-}
-
-static int
-bp_uint(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    unsigned long x;
-    Py_ssize_t i;
-    unsigned char *q = (unsigned char *)p;
-    if (get_ulong(state, v, &x) < 0)
-        return -1;
-    i = f->size;
-    if (i != SIZEOF_LONG) {
-        unsigned long maxint = 1;
-        maxint <<= (unsigned long)(i * 8);
-        if (x >= maxint)
-            RANGE_ERROR(state, x, f, 1, maxint - 1);
-    }
-    do {
-        q[--i] = (unsigned char)(x & 0xffUL);
-        x >>= 8;
-    } while (i > 0);
-    return 0;
-}
-
-static int
-bp_longlong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    int res;
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    res = _PyLong_AsByteArray((PyLongObject *)v,
-                              (unsigned char *)p,
-                              8,
-                              0, /* little_endian */
-                              1  /* signed */);
-    Py_DECREF(v);
-    return res;
-}
-
-static int
-bp_ulonglong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    int res;
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    res = _PyLong_AsByteArray((PyLongObject *)v,
-                              (unsigned char *)p,
-                              8,
-                              0, /* little_endian */
-                              0  /* signed */);
-    Py_DECREF(v);
-    return res;
-}
-
-static int
-bp_halffloat(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    return pack_halffloat(state, p, v, 0);
-}
-
-static int
-bp_float(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    double x = PyFloat_AsDouble(v);
-    if (x == -1 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    return _PyFloat_Pack4(x, (unsigned char *)p, 0);
-}
-
-static int
-bp_double(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    double x = PyFloat_AsDouble(v);
-    if (x == -1 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    return _PyFloat_Pack8(x, (unsigned char *)p, 0);
-}
-
-static int
-bp_bool(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    int y;
-    y = PyObject_IsTrue(v);
-    if (y < 0)
-        return -1;
-    *p = (char)y;
-    return 0;
-}
-
-static formatdef bigendian_table[] = {
-    {'x',       1,              0,              NULL},
-    {'b',       1,              0,              nu_byte,        np_byte},
-    {'B',       1,              0,              nu_ubyte,       np_ubyte},
-    {'c',       1,              0,              nu_char,        np_char},
-    {'s',       1,              0,              NULL},
-    {'p',       1,              0,              NULL},
-    {'h',       2,              0,              bu_int,         bp_int},
-    {'H',       2,              0,              bu_uint,        bp_uint},
-    {'i',       4,              0,              bu_int,         bp_int},
-    {'I',       4,              0,              bu_uint,        bp_uint},
-    {'l',       4,              0,              bu_int,         bp_int},
-    {'L',       4,              0,              bu_uint,        bp_uint},
-    {'q',       8,              0,              bu_longlong,    bp_longlong},
-    {'Q',       8,              0,              bu_ulonglong,   bp_ulonglong},
-    {'?',       1,              0,              bu_bool,        bp_bool},
-    {'e',       2,              0,              bu_halffloat,   bp_halffloat},
-    {'f',       4,              0,              bu_float,       bp_float},
-    {'d',       8,              0,              bu_double,      bp_double},
-    {0}
-};
-
-/* Little-endian routines. *****************************************************/
-
-static PyObject *
-lu_int(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | bytes[--i];
-    } while (i > 0);
-    /* Extend the sign bit. */
-    if (SIZEOF_LONG > f->size)
-        x |= -(x & (1L << ((8 * f->size) - 1)));
-    return PyLong_FromLong(x);
-}
-
-static PyObject *
-lu_uint(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | bytes[--i];
-    } while (i > 0);
-    return PyLong_FromUnsignedLong(x);
-}
-
-static PyObject *
-lu_longlong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    long long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | bytes[--i];
-    } while (i > 0);
-    /* Extend the sign bit. */
-    if (SIZEOF_LONG_LONG > f->size)
-        x |= -(x & ((long long)1 << ((8 * f->size) - 1)));
-    return PyLong_FromLongLong(x);
-}
-
-static PyObject *
-lu_ulonglong(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    unsigned long long x = 0;
-    Py_ssize_t i = f->size;
-    const unsigned char *bytes = (const unsigned char *)p;
-    do {
-        x = (x<<8) | bytes[--i];
-    } while (i > 0);
-    return PyLong_FromUnsignedLongLong(x);
-}
-
-static PyObject *
-lu_halffloat(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return unpack_halffloat(p, 1);
-}
-
-static PyObject *
-lu_float(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return unpack_float(p, 1);
-}
-
-static PyObject *
-lu_double(_structmodulestate *state, const char *p, const formatdef *f)
-{
-    return unpack_double(p, 1);
-}
-
-static int
-lp_int(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    long x;
-    Py_ssize_t i;
-    unsigned char *q = (unsigned char *)p;
-    if (get_long(state, v, &x) < 0)
-        return -1;
-    i = f->size;
-    if (i != SIZEOF_LONG) {
-        if ((i == 2) && (x < -32768 || x > 32767))
-            RANGE_ERROR(state, x, f, 0, 0xffffL);
-#if (SIZEOF_LONG != 4)
-        else if ((i == 4) && (x < -2147483648L || x > 2147483647L))
-            RANGE_ERROR(state, x, f, 0, 0xffffffffL);
-#endif
-    }
-    do {
-        *q++ = (unsigned char)(x & 0xffL);
-        x >>= 8;
-    } while (--i > 0);
-    return 0;
-}
-
-static int
-lp_uint(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    unsigned long x;
-    Py_ssize_t i;
-    unsigned char *q = (unsigned char *)p;
-    if (get_ulong(state, v, &x) < 0)
-        return -1;
-    i = f->size;
-    if (i != SIZEOF_LONG) {
-        unsigned long maxint = 1;
-        maxint <<= (unsigned long)(i * 8);
-        if (x >= maxint)
-            RANGE_ERROR(state, x, f, 1, maxint - 1);
-    }
-    do {
-        *q++ = (unsigned char)(x & 0xffUL);
-        x >>= 8;
-    } while (--i > 0);
-    return 0;
-}
-
-static int
-lp_longlong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    int res;
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    res = _PyLong_AsByteArray((PyLongObject*)v,
-                              (unsigned char *)p,
-                              8,
-                              1, /* little_endian */
-                              1  /* signed */);
-    Py_DECREF(v);
-    return res;
-}
-
-static int
-lp_ulonglong(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    int res;
-    v = get_pylong(state, v);
-    if (v == NULL)
-        return -1;
-    res = _PyLong_AsByteArray((PyLongObject*)v,
-                              (unsigned char *)p,
-                              8,
-                              1, /* little_endian */
-                              0  /* signed */);
-    Py_DECREF(v);
-    return res;
-}
-
-static int
-lp_halffloat(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    return pack_halffloat(state, p, v, 1);
-}
-
-static int
-lp_float(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    double x = PyFloat_AsDouble(v);
-    if (x == -1 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    return _PyFloat_Pack4(x, (unsigned char *)p, 1);
-}
-
-static int
-lp_double(_structmodulestate *state, char *p, PyObject *v, const formatdef *f)
-{
-    double x = PyFloat_AsDouble(v);
-    if (x == -1 && PyErr_Occurred()) {
-        PyErr_SetString(state->StructError,
-                        "required argument is not a float");
-        return -1;
-    }
-    return _PyFloat_Pack8(x, (unsigned char *)p, 1);
-}
-
-static formatdef lilendian_table[] = {
-    {'x',       1,              0,              NULL},
-    {'b',       1,              0,              nu_byte,        np_byte},
-    {'B',       1,              0,              nu_ubyte,       np_ubyte},
-    {'c',       1,              0,              nu_char,        np_char},
-    {'s',       1,              0,              NULL},
-    {'p',       1,              0,              NULL},
-    {'h',       2,              0,              lu_int,         lp_int},
-    {'H',       2,              0,              lu_uint,        lp_uint},
-    {'i',       4,              0,              lu_int,         lp_int},
-    {'I',       4,              0,              lu_uint,        lp_uint},
-    {'l',       4,              0,              lu_int,         lp_int},
-    {'L',       4,              0,              lu_uint,        lp_uint},
-    {'q',       8,              0,              lu_longlong,    lp_longlong},
-    {'Q',       8,              0,              lu_ulonglong,   lp_ulonglong},
-    {'?',       1,              0,              bu_bool,        bp_bool}, /* Std rep not endian dep,
-        but potentially different from native rep -- reuse bx_bool funcs. */
-    {'e',       2,              0,              lu_halffloat,   lp_halffloat},
-    {'f',       4,              0,              lu_float,       lp_float},
-    {'d',       8,              0,              lu_double,      lp_double},
-    {0}
-};
-
-
-static const formatdef *
-whichtable(const char **pfmt)
-{
-    const char *fmt = (*pfmt)++; /* May be backed out of later */
-    switch (*fmt) {
-    case '<':
-        return lilendian_table;
-    case '>':
-    case '!': /* Network byte order is big-endian */
-        return bigendian_table;
-    case '=': { /* Host byte order -- different from native in alignment! */
-#if PY_LITTLE_ENDIAN
-        return lilendian_table;
-#else
-        return bigendian_table;
-#endif
-    }
-    default:
-        --*pfmt; /* Back out of pointer increment */
-        /* Fall through */
-    case '@':
-        return native_table;
-    }
-}
-
-
-/* Get the table entry for a format code */
-
-static const formatdef *
-getentry(_structmodulestate *state, int c, const formatdef *f)
-{
-    for (; f->format != '\0'; f++) {
-        if (f->format == c) {
-            return f;
-        }
-    }
-    PyErr_SetString(state->StructError, "bad char in struct format");
-    return NULL;
-}
-
-
-/* Align a size according to a format code.  Return -1 on overflow. */
-
-static Py_ssize_t
-align(Py_ssize_t size, char c, const formatdef *e)
-{
-    Py_ssize_t extra;
-
-    if (e->format == c) {
-        if (e->alignment && size > 0) {
-            extra = (e->alignment - 1) - (size - 1) % (e->alignment);
-            if (extra > PY_SSIZE_T_MAX - size)
-                return -1;
-            size += extra;
-        }
-    }
-    return size;
-}
-
-/*
- * Struct object implementation.
- */
-
-/* calculate the size of a format string */
-
-static int
-prepare_s(PyStructObject *self)
-{
-    const formatdef *f;
-    const formatdef *e;
-    formatcode *codes;
-
-    const char *s;
-    const char *fmt;
-    char c;
-    Py_ssize_t size, len, num, itemsize;
-    size_t ncodes;
-
-    _structmodulestate *state = get_struct_state_structinst(self);
-
-    fmt = PyBytes_AS_STRING(self->s_format);
-    if (strlen(fmt) != (size_t)PyBytes_GET_SIZE(self->s_format)) {
-        PyErr_SetString(state->StructError,
-                        "embedded null character");
-        return -1;
-    }
-
-    f = whichtable(&fmt);
-
-    s = fmt;
-    size = 0;
-    len = 0;
-    ncodes = 0;
-    while ((c = *s++) != '\0') {
-        if (Py_ISSPACE(c))
-            continue;
-        if ('0' <= c && c <= '9') {
-            num = c - '0';
-            while ('0' <= (c = *s++) && c <= '9') {
-                /* overflow-safe version of
-                   if (num*10 + (c - '0') > PY_SSIZE_T_MAX) { ... } */
-                if (num >= PY_SSIZE_T_MAX / 10 && (
-                        num > PY_SSIZE_T_MAX / 10 ||
-                        (c - '0') > PY_SSIZE_T_MAX % 10))
-                    goto overflow;
-                num = num*10 + (c - '0');
-            }
-            if (c == '\0') {
-                PyErr_SetString(state->StructError,
-                                "repeat count given without format specifier");
-                return -1;
-            }
-        }
-        else
-            num = 1;
-
-        e = getentry(state, c, f);
-        if (e == NULL)
-            return -1;
-
-        switch (c) {
-            case 's': /* fall through */
-            case 'p': len++; ncodes++; break;
-            case 'x': break;
-            default: len += num; if (num) ncodes++; break;
-        }
-
-        itemsize = e->size;
-        size = align(size, c, e);
-        if (size == -1)
-            goto overflow;
-
-        /* if (size + num * itemsize > PY_SSIZE_T_MAX) { ... } */
-        if (num > (PY_SSIZE_T_MAX - size) / itemsize)
-            goto overflow;
-        size += num * itemsize;
-    }
-
-    /* check for overflow */
-    if ((ncodes + 1) > ((size_t)PY_SSIZE_T_MAX / sizeof(formatcode))) {
-        PyErr_NoMemory();
-        return -1;
-    }
-
-    self->s_size = size;
-    self->s_len = len;
-    codes = PyMem_Malloc((ncodes + 1) * sizeof(formatcode));
-    if (codes == NULL) {
-        PyErr_NoMemory();
-        return -1;
-    }
-    /* Free any s_codes value left over from a previous initialization. */
-    if (self->s_codes != NULL)
-        PyMem_Free(self->s_codes);
-    self->s_codes = codes;
-
-    s = fmt;
-    size = 0;
-    while ((c = *s++) != '\0') {
-        if (Py_ISSPACE(c))
-            continue;
-        if ('0' <= c && c <= '9') {
-            num = c - '0';
-            while ('0' <= (c = *s++) && c <= '9')
-                num = num*10 + (c - '0');
-        }
-        else
-            num = 1;
-
-        e = getentry(state, c, f);
-
-        size = align(size, c, e);
-        if (c == 's' || c == 'p') {
-            codes->offset = size;
-            codes->size = num;
-            codes->fmtdef = e;
-            codes->repeat = 1;
-            codes++;
-            size += num;
-        } else if (c == 'x') {
-            size += num;
-        } else if (num) {
-            codes->offset = size;
-            codes->size = e->size;
-            codes->fmtdef = e;
-            codes->repeat = num;
-            codes++;
-            size += e->size * num;
-        }
-    }
-    codes->fmtdef = NULL;
-    codes->offset = size;
-    codes->size = 0;
-    codes->repeat = 0;
-
-    return 0;
-
-  overflow:
-    PyErr_SetString(state->StructError,
-                    "total struct size too long");
-    return -1;
-}
-
-static PyObject *
-s_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
-{
-    PyObject *self;
-
-    assert(type != NULL);
-    allocfunc alloc_func = PyType_GetSlot(type, Py_tp_alloc);
-    assert(alloc_func != NULL);
-
-    self = alloc_func(type, 0);
-    if (self != NULL) {
-        PyStructObject *s = (PyStructObject*)self;
-        s->s_format = Py_NewRef(Py_None);
-        s->s_codes = NULL;
-        s->s_size = -1;
-        s->s_len = -1;
-    }
-    return self;
-}
-
-/*[clinic input]
-Struct.__init__
-
-    format: object
-
-Create a compiled struct object.
-
-Return a new Struct object which writes and reads binary data according to
-the format string.
-
-See help(struct) for more on format strings.
-[clinic start generated code]*/
-
-static int
-Struct___init___impl(PyStructObject *self, PyObject *format)
-/*[clinic end generated code: output=b8e80862444e92d0 input=192a4575a3dde802]*/
-{
-    int ret = 0;
-
-    if (PyUnicode_Check(format)) {
-        format = PyUnicode_AsASCIIString(format);
-        if (format == NULL)
-            return -1;
-    }
-    /* XXX support buffer interface, too */
-    else {
-        Py_INCREF(format);
-    }
-
-    if (!PyBytes_Check(format)) {
-        Py_DECREF(format);
-        PyErr_Format(PyExc_TypeError,
-                     "Struct() argument 1 must be a str or bytes object, "
-                     "not %.200s",
-                     _PyType_Name(Py_TYPE(format)));
-        return -1;
-    }
-
-    Py_SETREF(self->s_format, format);
-
-    ret = prepare_s(self);
-    return ret;
-}
-
-static void
-s_dealloc(PyStructObject *s)
-{
-    PyTypeObject *tp = Py_TYPE(s);
-    if (s->weakreflist != NULL)
-        PyObject_ClearWeakRefs((PyObject *)s);
-    if (s->s_codes != NULL) {
-        PyMem_Free(s->s_codes);
-    }
-    Py_XDECREF(s->s_format);
-    freefunc free_func = PyType_GetSlot(Py_TYPE(s), Py_tp_free);
-    free_func(s);
-    Py_DECREF(tp);
-}
-
-static PyObject *
-s_unpack_internal(PyStructObject *soself, const char *startfrom,
-                  _structmodulestate *state) {
-    formatcode *code;
-    Py_ssize_t i = 0;
-    PyObject *result = PyTuple_New(soself->s_len);
-    if (result == NULL)
-        return NULL;
-
-    for (code = soself->s_codes; code->fmtdef != NULL; code++) {
-        const formatdef *e = code->fmtdef;
-        const char *res = startfrom + code->offset;
-        Py_ssize_t j = code->repeat;
-        while (j--) {
-            PyObject *v;
-            if (e->format == 's') {
-                v = PyBytes_FromStringAndSize(res, code->size);
-            } else if (e->format == 'p') {
-                Py_ssize_t n = *(unsigned char*)res;
-                if (n >= code->size)
-                    n = code->size - 1;
-                v = PyBytes_FromStringAndSize(res + 1, n);
-            } else {
-                v = e->unpack(state, res, e);
-            }
-            if (v == NULL)
-                goto fail;
-            PyTuple_SET_ITEM(result, i++, v);
-            res += code->size;
-        }
-    }
-
-    return result;
-fail:
-    Py_DECREF(result);
-    return NULL;
-}
-
-
-/*[clinic input]
-Struct.unpack
-
-    buffer: Py_buffer
-    /
-
-Return a tuple containing unpacked values.
-
-Unpack according to the format string Struct.format. The buffer's size
-in bytes must be Struct.size.
-
-See help(struct) for more on format strings.
-[clinic start generated code]*/
-
-static PyObject *
-Struct_unpack_impl(PyStructObject *self, Py_buffer *buffer)
-/*[clinic end generated code: output=873a24faf02e848a input=3113f8e7038b2f6c]*/
-{
-    _structmodulestate *state = get_struct_state_structinst(self);
-    assert(self->s_codes != NULL);
-    if (buffer->len != self->s_size) {
-        PyErr_Format(state->StructError,
-                     "unpack requires a buffer of %zd bytes",
-                     self->s_size);
-        return NULL;
-    }
-    return s_unpack_internal(self, buffer->buf, state);
-}
-
-/*[clinic input]
-Struct.unpack_from
-
-    buffer: Py_buffer
-    offset: Py_ssize_t = 0
-
-Return a tuple containing unpacked values.
-
-Values are unpacked according to the format string Struct.format.
-
-The buffer's size in bytes, starting at position offset, must be
-at least Struct.size.
-
-See help(struct) for more on format strings.
-[clinic start generated code]*/
-
-static PyObject *
-Struct_unpack_from_impl(PyStructObject *self, Py_buffer *buffer,
-                        Py_ssize_t offset)
-/*[clinic end generated code: output=57fac875e0977316 input=cafd4851d473c894]*/
-{
-    _structmodulestate *state = get_struct_state_structinst(self);
-    assert(self->s_codes != NULL);
-
-    if (offset < 0) {
-        if (offset + self->s_size > 0) {
-            PyErr_Format(state->StructError,
-                         "not enough data to unpack %zd bytes at offset %zd",
-                         self->s_size,
-                         offset);
-            return NULL;
-        }
-
-        if (offset + buffer->len < 0) {
-            PyErr_Format(state->StructError,
-                         "offset %zd out of range for %zd-byte buffer",
-                         offset,
-                         buffer->len);
-            return NULL;
-        }
-        offset += buffer->len;
-    }
-
-    if ((buffer->len - offset) < self->s_size) {
-        PyErr_Format(state->StructError,
-                     "unpack_from requires a buffer of at least %zu bytes for "
-                     "unpacking %zd bytes at offset %zd "
-                     "(actual buffer size is %zd)",
-                     (size_t)self->s_size + (size_t)offset,
-                     self->s_size,
-                     offset,
-                     buffer->len);
-        return NULL;
-    }
-    return s_unpack_internal(self, (char*)buffer->buf + offset, state);
-}
-
-
-
-/* Unpack iterator type */
-
-typedef struct {
-    PyObject_HEAD
-    PyStructObject *so;
-    Py_buffer buf;
-    Py_ssize_t index;
-} unpackiterobject;
-
-static void
-unpackiter_dealloc(unpackiterobject *self)
-{
-    /* bpo-31095: UnTrack is needed before calling any callbacks */
-    PyTypeObject *tp = Py_TYPE(self);
-    PyObject_GC_UnTrack(self);
-    Py_XDECREF(self->so);
-    PyBuffer_Release(&self->buf);
-    PyObject_GC_Del(self);
-    Py_DECREF(tp);
-}
-
-static int
-unpackiter_traverse(unpackiterobject *self, visitproc visit, void *arg)
-{
-    Py_VISIT(Py_TYPE(self));
-    Py_VISIT(self->so);
-    Py_VISIT(self->buf.obj);
-    return 0;
-}
-
-static PyObject *
-unpackiter_len(unpackiterobject *self, PyObject *Py_UNUSED(ignored))
-{
-    Py_ssize_t len;
-    if (self->so == NULL)
-        len = 0;
-    else
-        len = (self->buf.len - self->index) / self->so->s_size;
-    return PyLong_FromSsize_t(len);
-}
-
-static PyMethodDef unpackiter_methods[] = {
-    {"__length_hint__", (PyCFunction) unpackiter_len, METH_NOARGS, NULL},
-    {NULL,              NULL}           /* sentinel */
-};
-
-static PyObject *
-unpackiter_iternext(unpackiterobject *self)
-{
-    _structmodulestate *state = get_struct_state_iterinst(self);
-    PyObject *result;
-    if (self->so == NULL)
-        return NULL;
-    if (self->index >= self->buf.len) {
-        /* Iterator exhausted */
-        Py_CLEAR(self->so);
-        PyBuffer_Release(&self->buf);
-        return NULL;
-    }
-    assert(self->index + self->so->s_size <= self->buf.len);
-    result = s_unpack_internal(self->so,
-                               (char*) self->buf.buf + self->index,
-                               state);
-    self->index += self->so->s_size;
-    return result;
-}
-
-PyObject *unpackiter_new(PyTypeObject *type, PyObject *args, PyObject *kwds) {
-    PyErr_Format(PyExc_TypeError, "Cannot create '%.200s objects", _PyType_Name(type));
-    return NULL;
-}
-
-static PyType_Slot unpackiter_type_slots[] = {
-    {Py_tp_dealloc, unpackiter_dealloc},
-    {Py_tp_getattro, PyObject_GenericGetAttr},
-    {Py_tp_traverse, unpackiter_traverse},
-    {Py_tp_iter, PyObject_SelfIter},
-    {Py_tp_iternext, unpackiter_iternext},
-    {Py_tp_methods, unpackiter_methods},
-    {Py_tp_new, unpackiter_new},
-    {0, 0},
-};
-
-static PyType_Spec unpackiter_type_spec = {
-    "_struct.unpack_iterator",
-    sizeof(unpackiterobject),
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,
-    unpackiter_type_slots
-};
-
-/*[clinic input]
-Struct.iter_unpack
-
-    buffer: object
-    /
-
-Return an iterator yielding tuples.
-
-Tuples are unpacked from the given bytes source, like a repeated
-invocation of unpack_from().
-
-Requires that the bytes length be a multiple of the struct size.
-[clinic start generated code]*/
-
-static PyObject *
-Struct_iter_unpack(PyStructObject *self, PyObject *buffer)
-/*[clinic end generated code: output=172d83d0cd15dbab input=6d65b3f3107dbc99]*/
-{
-    _structmodulestate *state = get_struct_state_structinst(self);
-    unpackiterobject *iter;
-
-    assert(self->s_codes != NULL);
-
-    if (self->s_size == 0) {
-        PyErr_Format(state->StructError,
-                     "cannot iteratively unpack with a struct of length 0");
-        return NULL;
-    }
-
-    iter = (unpackiterobject *) PyType_GenericAlloc((PyTypeObject *)state->unpackiter_type, 0);
-    if (iter == NULL)
-        return NULL;
-
-    if (PyObject_GetBuffer(buffer, &iter->buf, PyBUF_SIMPLE) < 0) {
-        Py_DECREF(iter);
-        return NULL;
-    }
-    if (iter->buf.len % self->s_size != 0) {
-        PyErr_Format(state->StructError,
-                     "iterative unpacking requires a buffer of "
-                     "a multiple of %zd bytes",
-                     self->s_size);
-        Py_DECREF(iter);
-        return NULL;
-    }
-    Py_INCREF(self);
-    iter->so = self;
-    iter->index = 0;
-    return (PyObject *)iter;
-}
-
-
-/*
- * Guts of the pack function.
- *
- * Takes a struct object, a tuple of arguments, and offset in that tuple of
- * argument for where to start processing the arguments for packing, and a
- * character buffer for writing the packed string.  The caller must insure
- * that the buffer may contain the required length for packing the arguments.
- * 0 is returned on success, 1 is returned if there is an error.
- *
- */
-static int
-s_pack_internal(PyStructObject *soself, PyObject *const *args, int offset,
-                char* buf, _structmodulestate *state)
-{
-    formatcode *code;
-    /* XXX(nnorwitz): why does i need to be a local?  can we use
-       the offset parameter or do we need the wider width? */
-    Py_ssize_t i;
-
-    memset(buf, '\0', soself->s_size);
-    i = offset;
-    for (code = soself->s_codes; code->fmtdef != NULL; code++) {
-        const formatdef *e = code->fmtdef;
-        char *res = buf + code->offset;
-        Py_ssize_t j = code->repeat;
-        while (j--) {
-            PyObject *v = args[i++];
-            if (e->format == 's') {
-                Py_ssize_t n;
-                int isstring;
-                const void *p;
-                isstring = PyBytes_Check(v);
-                if (!isstring && !PyByteArray_Check(v)) {
-                    PyErr_SetString(state->StructError,
-                                    "argument for 's' must be a bytes object");
-                    return -1;
-                }
-                if (isstring) {
-                    n = PyBytes_GET_SIZE(v);
-                    p = PyBytes_AS_STRING(v);
-                }
-                else {
-                    n = PyByteArray_GET_SIZE(v);
-                    p = PyByteArray_AS_STRING(v);
-                }
-                if (n > code->size)
-                    n = code->size;
-                if (n > 0)
-                    memcpy(res, p, n);
-            } else if (e->format == 'p') {
-                Py_ssize_t n;
-                int isstring;
-                const void *p;
-                isstring = PyBytes_Check(v);
-                if (!isstring && !PyByteArray_Check(v)) {
-                    PyErr_SetString(state->StructError,
-                                    "argument for 'p' must be a bytes object");
-                    return -1;
-                }
-                if (isstring) {
-                    n = PyBytes_GET_SIZE(v);
-                    p = PyBytes_AS_STRING(v);
-                }
-                else {
-                    n = PyByteArray_GET_SIZE(v);
-                    p = PyByteArray_AS_STRING(v);
-                }
-                if (n > (code->size - 1))
-                    n = code->size - 1;
-                if (n > 0)
-                    memcpy(res + 1, p, n);
-                if (n > 255)
-                    n = 255;
-                *res = Py_SAFE_DOWNCAST(n, Py_ssize_t, unsigned char);
-            } else {
-                if (e->pack(state, res, v, e) < 0) {
-                    if (PyLong_Check(v) && PyErr_ExceptionMatches(PyExc_OverflowError))
-                        PyErr_SetString(state->StructError,
-                                        "int too large to convert");
-                    return -1;
-                }
-            }
-            res += code->size;
-        }
-    }
-
-    /* Success */
-    return 0;
-}
-
-
-PyDoc_STRVAR(s_pack__doc__,
-"S.pack(v1, v2, ...) -> bytes\n\
-\n\
-Return a bytes object containing values v1, v2, ... packed according\n\
-to the format string S.format.  See help(struct) for more on format\n\
-strings.");
-
-static PyObject *
-s_pack(PyObject *self, PyObject *const *args, Py_ssize_t nargs)
-{
-    char *buf;
-    PyStructObject *soself;
-    _structmodulestate *state = get_struct_state_structinst(self);
-
-    /* Validate arguments. */
-    soself = (PyStructObject *)self;
-    assert(PyStruct_Check(self, state));
-    assert(soself->s_codes != NULL);
-    if (nargs != soself->s_len)
-    {
-        PyErr_Format(state->StructError,
-            "pack expected %zd items for packing (got %zd)", soself->s_len, nargs);
-        return NULL;
-    }
-
-    /* Allocate a new string */
-    _PyBytesWriter writer;
-    _PyBytesWriter_Init(&writer);
-    buf = _PyBytesWriter_Alloc(&writer, soself->s_size);
-    if (buf == NULL) {
-        _PyBytesWriter_Dealloc(&writer);
-        return NULL;
-    }
-
-    /* Call the guts */
-    if ( s_pack_internal(soself, args, 0, buf, state) != 0 ) {
-        _PyBytesWriter_Dealloc(&writer);
-        return NULL;
-    }
-
-    return _PyBytesWriter_Finish(&writer, buf + soself->s_size);
-}
-
-PyDoc_STRVAR(s_pack_into__doc__,
-"S.pack_into(buffer, offset, v1, v2, ...)\n\
-\n\
-Pack the values v1, v2, ... according to the format string S.format\n\
-and write the packed bytes into the writable buffer buf starting at\n\
-offset.  Note that the offset is a required argument.  See\n\
-help(struct) for more on format strings.");
-
-static PyObject *
-s_pack_into(PyObject *self, PyObject *const *args, Py_ssize_t nargs)
-{
-    PyStructObject *soself;
-    Py_buffer buffer;
-    Py_ssize_t offset;
-    _structmodulestate *state = get_struct_state_structinst(self);
-
-    /* Validate arguments.  +1 is for the first arg as buffer. */
-    soself = (PyStructObject *)self;
-    assert(PyStruct_Check(self, state));
-    assert(soself->s_codes != NULL);
-    if (nargs != (soself->s_len + 2))
-    {
-        if (nargs == 0) {
-            PyErr_Format(state->StructError,
-                        "pack_into expected buffer argument");
-        }
-        else if (nargs == 1) {
-            PyErr_Format(state->StructError,
-                        "pack_into expected offset argument");
-        }
-        else {
-            PyErr_Format(state->StructError,
-                        "pack_into expected %zd items for packing (got %zd)",
-                        soself->s_len, (nargs - 2));
-        }
-        return NULL;
-    }
-
-    /* Extract a writable memory buffer from the first argument */
-    if (!PyArg_Parse(args[0], "w*", &buffer))
-        return NULL;
-    assert(buffer.len >= 0);
-
-    /* Extract the offset from the first argument */
-    offset = PyNumber_AsSsize_t(args[1], PyExc_IndexError);
-    if (offset == -1 && PyErr_Occurred()) {
-        PyBuffer_Release(&buffer);
-        return NULL;
-    }
-
-    /* Support negative offsets. */
-    if (offset < 0) {
-         /* Check that negative offset is low enough to fit data */
-        if (offset + soself->s_size > 0) {
-            PyErr_Format(state->StructError,
-                         "no space to pack %zd bytes at offset %zd",
-                         soself->s_size,
-                         offset);
-            PyBuffer_Release(&buffer);
-            return NULL;
-        }
-
-        /* Check that negative offset is not crossing buffer boundary */
-        if (offset + buffer.len < 0) {
-            PyErr_Format(state->StructError,
-                         "offset %zd out of range for %zd-byte buffer",
-                         offset,
-                         buffer.len);
-            PyBuffer_Release(&buffer);
-            return NULL;
-        }
-
-        offset += buffer.len;
-    }
-
-    /* Check boundaries */
-    if ((buffer.len - offset) < soself->s_size) {
-        assert(offset >= 0);
-        assert(soself->s_size >= 0);
-
-        PyErr_Format(state->StructError,
-                     "pack_into requires a buffer of at least %zu bytes for "
-                     "packing %zd bytes at offset %zd "
-                     "(actual buffer size is %zd)",
-                     (size_t)soself->s_size + (size_t)offset,
-                     soself->s_size,
-                     offset,
-                     buffer.len);
-        PyBuffer_Release(&buffer);
-        return NULL;
-    }
-
-    /* Call the guts */
-    if (s_pack_internal(soself, args, 2, (char*)buffer.buf + offset, state) != 0) {
-        PyBuffer_Release(&buffer);
-        return NULL;
-    }
-
-    PyBuffer_Release(&buffer);
-    Py_RETURN_NONE;
-}
-
-static PyObject *
-s_get_format(PyStructObject *self, void *unused)
-{
-    return PyUnicode_FromStringAndSize(PyBytes_AS_STRING(self->s_format),
-                                       PyBytes_GET_SIZE(self->s_format));
-}
-
-static PyObject *
-s_get_size(PyStructObject *self, void *unused)
-{
-    return PyLong_FromSsize_t(self->s_size);
-}
-
-PyDoc_STRVAR(s_sizeof__doc__,
-"S.__sizeof__() -> size of S in memory, in bytes");
-
-static PyObject *
-s_sizeof(PyStructObject *self, void *unused)
-{
-    Py_ssize_t size;
-    formatcode *code;
-
-    size = _PyObject_SIZE(Py_TYPE(self)) + sizeof(formatcode);
-    for (code = self->s_codes; code->fmtdef != NULL; code++)
-        size += sizeof(formatcode);
-    return PyLong_FromSsize_t(size);
-}
-
-/* List of functions */
-
-static struct PyMethodDef s_methods[] = {
-    STRUCT_ITER_UNPACK_METHODDEF
-    {"pack",            (PyCFunction)(void(*)(void))s_pack, METH_FASTCALL, s_pack__doc__},
-    {"pack_into",       (PyCFunction)(void(*)(void))s_pack_into, METH_FASTCALL, s_pack_into__doc__},
-    STRUCT_UNPACK_METHODDEF
-    STRUCT_UNPACK_FROM_METHODDEF
-    {"__sizeof__",      (PyCFunction)s_sizeof, METH_NOARGS, s_sizeof__doc__},
-    {NULL,       NULL}          /* sentinel */
-};
-
-static PyMemberDef s_members[] = {
-    {"__weaklistoffset__", T_PYSSIZET, offsetof(PyStructObject, weakreflist), READONLY},
-    {NULL}  /* sentinel */
-};
-
-#define OFF(x) offsetof(PyStructObject, x)
-
-static PyGetSetDef s_getsetlist[] = {
-    {"format", (getter)s_get_format, (setter)NULL, "struct format string", NULL},
-    {"size", (getter)s_get_size, (setter)NULL, "struct size in bytes", NULL},
-    {NULL} /* sentinel */
-};
-
-PyDoc_STRVAR(s__doc__,
-"Struct(fmt) --> compiled struct object\n"
-"\n"
-);
-
-static PyType_Slot PyStructType_slots[] = {
-    {Py_tp_dealloc, s_dealloc},
-    {Py_tp_getattro, PyObject_GenericGetAttr},
-    {Py_tp_setattro, PyObject_GenericSetAttr},
-    {Py_tp_doc, (void*)s__doc__},
-    {Py_tp_methods, s_methods},
-    {Py_tp_members, s_members},
-    {Py_tp_getset, s_getsetlist},
-    {Py_tp_init, Struct___init__},
-    {Py_tp_alloc, PyType_GenericAlloc},
-    {Py_tp_new, s_new},
-    {Py_tp_free, PyObject_Del},
-    {0, 0},
-};
-
-static PyType_Spec PyStructType_spec = {
-    "_struct.Struct",
-    sizeof(PyStructObject),
-    0,
-    Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
-    PyStructType_slots
-};
-
-
-/* ---- Standalone functions  ---- */
-
-#define MAXCACHE 100
-
-static int
-cache_struct_converter(PyObject *module, PyObject *fmt, PyStructObject **ptr)
-{
-    PyObject * s_object;
-    _structmodulestate *state = get_struct_state(module);
-
-    if (fmt == NULL) {
-        Py_DECREF(*ptr);
-        *ptr = NULL;
-        return 1;
-    }
-
-    if (state->cache == NULL) {
-        state->cache = PyDict_New();
-        if (state->cache == NULL)
-            return 0;
-    }
-
-    s_object = PyDict_GetItemWithError(state->cache, fmt);
-    if (s_object != NULL) {
-        Py_INCREF(s_object);
-        *ptr = (PyStructObject *)s_object;
-        return Py_CLEANUP_SUPPORTED;
-    }
-    else if (PyErr_Occurred()) {
-        return 0;
-    }
-
-    s_object = PyObject_CallOneArg(state->PyStructType, fmt);
-    if (s_object != NULL) {
-        if (PyDict_GET_SIZE(state->cache) >= MAXCACHE)
-            PyDict_Clear(state->cache);
-        /* Attempt to cache the result */
-        if (PyDict_SetItem(state->cache, fmt, s_object) == -1)
-            PyErr_Clear();
-        *ptr = (PyStructObject *)s_object;
-        return Py_CLEANUP_SUPPORTED;
-    }
-    return 0;
-}
-
-/*[clinic input]
-_clearcache
-
-Clear the internal cache.
-[clinic start generated code]*/
-
-static PyObject *
-_clearcache_impl(PyObject *module)
-/*[clinic end generated code: output=ce4fb8a7bf7cb523 input=463eaae04bab3211]*/
-{
-    Py_CLEAR(get_struct_state(module)->cache);
-    Py_RETURN_NONE;
-}
-
-
-/*[clinic input]
-calcsize -> Py_ssize_t
-
-    format as s_object: cache_struct
-    /
-
-Return size in bytes of the struct described by the format string.
-[clinic start generated code]*/
-
-static Py_ssize_t
-calcsize_impl(PyObject *module, PyStructObject *s_object)
-/*[clinic end generated code: output=db7d23d09c6932c4 input=96a6a590c7717ecd]*/
-{
-    return s_object->s_size;
-}
-
-PyDoc_STRVAR(pack_doc,
-"pack(format, v1, v2, ...) -> bytes\n\
-\n\
-Return a bytes object containing the values v1, v2, ... packed according\n\
-to the format string.  See help(struct) for more on format strings.");
-
-static PyObject *
-pack(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
-{
-    PyObject *s_object = NULL;
-    PyObject *format, *result;
-
-    if (nargs == 0) {
-        PyErr_SetString(PyExc_TypeError, "missing format argument");
-        return NULL;
-    }
-    format = args[0];
-
-    if (!cache_struct_converter(module, format, (PyStructObject **)&s_object)) {
-        return NULL;
-    }
-    result = s_pack(s_object, args + 1, nargs - 1);
-    Py_DECREF(s_object);
-    return result;
-}
-
-PyDoc_STRVAR(pack_into_doc,
-"pack_into(format, buffer, offset, v1, v2, ...)\n\
-\n\
-Pack the values v1, v2, ... according to the format string and write\n\
-the packed bytes into the writable buffer buf starting at offset.  Note\n\
-that the offset is a required argument.  See help(struct) for more\n\
-on format strings.");
-
-static PyObject *
-pack_into(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
-{
-    PyObject *s_object = NULL;
-    PyObject *format, *result;
-
-    if (nargs == 0) {
-        PyErr_SetString(PyExc_TypeError, "missing format argument");
-        return NULL;
-    }
-    format = args[0];
-
-    if (!cache_struct_converter(module, format, (PyStructObject **)&s_object)) {
-        return NULL;
-    }
-    result = s_pack_into(s_object, args + 1, nargs - 1);
-    Py_DECREF(s_object);
-    return result;
-}
-
-/*[clinic input]
-unpack
-
-    format as s_object: cache_struct
-    buffer: Py_buffer
-    /
-
-Return a tuple containing values unpacked according to the format string.
-
-The buffer's size in bytes must be calcsize(format).
-
-See help(struct) for more on format strings.
-[clinic start generated code]*/
-
-static PyObject *
-unpack_impl(PyObject *module, PyStructObject *s_object, Py_buffer *buffer)
-/*[clinic end generated code: output=48ddd4d88eca8551 input=05fa3b91678da727]*/
-{
-    return Struct_unpack_impl(s_object, buffer);
-}
-
-/*[clinic input]
-unpack_from
-
-    format as s_object: cache_struct
-    /
-    buffer: Py_buffer
-    offset: Py_ssize_t = 0
-
-Return a tuple containing values unpacked according to the format string.
-
-The buffer's size, minus offset, must be at least calcsize(format).
-
-See help(struct) for more on format strings.
-[clinic start generated code]*/
-
-static PyObject *
-unpack_from_impl(PyObject *module, PyStructObject *s_object,
-                 Py_buffer *buffer, Py_ssize_t offset)
-/*[clinic end generated code: output=1042631674c6e0d3 input=6e80a5398e985025]*/
-{
-    return Struct_unpack_from_impl(s_object, buffer, offset);
-}
-
-/*[clinic input]
-iter_unpack
-
-    format as s_object: cache_struct
-    buffer: object
-    /
-
-Return an iterator yielding tuples unpacked from the given bytes.
-
-The bytes are unpacked according to the format string, like
-a repeated invocation of unpack_from().
-
-Requires that the bytes length be a multiple of the format struct size.
-[clinic start generated code]*/
-
-static PyObject *
-iter_unpack_impl(PyObject *module, PyStructObject *s_object,
-                 PyObject *buffer)
-/*[clinic end generated code: output=0ae50e250d20e74d input=b214a58869a3c98d]*/
-{
-    return Struct_iter_unpack(s_object, buffer);
-}
-
-static struct PyMethodDef module_functions[] = {
-    _CLEARCACHE_METHODDEF
-    CALCSIZE_METHODDEF
-    ITER_UNPACK_METHODDEF
-    {"pack",            (PyCFunction)(void(*)(void))pack, METH_FASTCALL,   pack_doc},
-    {"pack_into",       (PyCFunction)(void(*)(void))pack_into, METH_FASTCALL,   pack_into_doc},
-    UNPACK_METHODDEF
-    UNPACK_FROM_METHODDEF
-    {NULL,       NULL}          /* sentinel */
-};
-
-
-/* Module initialization */
-
-PyDoc_STRVAR(module_doc,
-"Functions to convert between Python values and C structs.\n\
-Python bytes objects are used to hold the data representing the C struct\n\
-and also as format strings (explained below) to describe the layout of data\n\
-in the C struct.\n\
-\n\
-The optional first format char indicates byte order, size and alignment:\n\
-  @: native order, size & alignment (default)\n\
-  =: native order, std. size & alignment\n\
-  <: little-endian, std. size & alignment\n\
-  >: big-endian, std. size & alignment\n\
-  !: same as >\n\
-\n\
-The remaining chars indicate types of args and must match exactly;\n\
-these can be preceded by a decimal repeat count:\n\
-  x: pad byte (no data); c:char; b:signed byte; B:unsigned byte;\n\
-  ?: _Bool (requires C99; if not available, char is used instead)\n\
-  h:short; H:unsigned short; i:int; I:unsigned int;\n\
-  l:long; L:unsigned long; f:float; d:double; e:half-float.\n\
-Special cases (preceding decimal count indicates length):\n\
-  s:string (array of char); p: pascal string (with count byte).\n\
-Special cases (only available in native format):\n\
-  n:ssize_t; N:size_t;\n\
-  P:an integer type that is wide enough to hold a pointer.\n\
-Special case (not in native mode unless 'long long' in platform C):\n\
-  q:long long; Q:unsigned long long\n\
-Whitespace between formats is ignored.\n\
-\n\
-The variable struct.error is an exception raised on errors.\n");
-
-
-static int
-_structmodule_traverse(PyObject *module, visitproc visit, void *arg)
-{
-    _structmodulestate *state = get_struct_state(module);
-    if (state) {
-        Py_VISIT(state->cache);
-        Py_VISIT(state->PyStructType);
-        Py_VISIT(state->unpackiter_type);
-        Py_VISIT(state->StructError);
-    }
-    return 0;
-}
-
-static int
-_structmodule_clear(PyObject *module)
-{
-    _structmodulestate *state = get_struct_state(module);
-    if (state) {
-        Py_CLEAR(state->cache);
-        Py_CLEAR(state->PyStructType);
-        Py_CLEAR(state->unpackiter_type);
-        Py_CLEAR(state->StructError);
-    }
-    return 0;
-}
-
-static void
-_structmodule_free(void *module)
-{
-    _structmodule_clear((PyObject *)module);
-}
-
-static int
-_structmodule_exec(PyObject *m)
-{
-    _structmodulestate *state = get_struct_state(m);
-
-    state->PyStructType = PyType_FromModuleAndSpec(
-        m, &PyStructType_spec, NULL);
-    if (state->PyStructType == NULL) {
-        return -1;
-    }
-    if (PyModule_AddType(m, (PyTypeObject *)state->PyStructType) < 0) {
-        return -1;
-    }
-
-    state->unpackiter_type = PyType_FromModuleAndSpec(
-        m, &unpackiter_type_spec, NULL);
-    if (state->unpackiter_type == NULL) {
-        return -1;
-    }
-
-    /* Check endian and swap in faster functions */
-    {
-        const formatdef *native = native_table;
-        formatdef *other, *ptr;
-#if PY_LITTLE_ENDIAN
-        other = lilendian_table;
-#else
-        other = bigendian_table;
-#endif
-        /* Scan through the native table, find a matching
-           entry in the endian table and swap in the
-           native implementations whenever possible
-           (64-bit platforms may not have "standard" sizes) */
-        while (native->format != '\0' && other->format != '\0') {
-            ptr = other;
-            while (ptr->format != '\0') {
-                if (ptr->format == native->format) {
-                    /* Match faster when formats are
-                       listed in the same order */
-                    if (ptr == other)
-                        other++;
-                    /* Only use the trick if the
-                       size matches */
-                    if (ptr->size != native->size)
-                        break;
-                    /* Skip float and double, could be
-                       "unknown" float format */
-                    if (ptr->format == 'd' || ptr->format == 'f')
-                        break;
-                    /* Skip _Bool, semantics are different for standard size */
-                    if (ptr->format == '?')
-                        break;
-                    ptr->pack = native->pack;
-                    ptr->unpack = native->unpack;
-                    break;
-                }
-                ptr++;
-            }
-            native++;
-        }
-    }
-
-    /* Add some symbolic constants to the module */
-    state->StructError = PyErr_NewException("struct.error", NULL, NULL);
-    if (state->StructError == NULL) {
-        return -1;
-    }
-    if (PyModule_AddObjectRef(m, "error", state->StructError) < 0) {
-        return -1;
-    }
-
-    return 0;
-}
-
-static PyModuleDef_Slot _structmodule_slots[] = {
-    {Py_mod_exec, _structmodule_exec},
-    {0, NULL}
-};
-
-static struct PyModuleDef _structmodule = {
-    PyModuleDef_HEAD_INIT,
-    .m_name = "_struct",
-    .m_doc = module_doc,
-    .m_size = sizeof(_structmodulestate),
-    .m_methods = module_functions,
-    .m_slots = _structmodule_slots,
-    .m_traverse = _structmodule_traverse,
-    .m_clear = _structmodule_clear,
-    .m_free = _structmodule_free,
-};
-
-PyMODINIT_FUNC
-PyInit__struct(void)
-{
-    return PyModuleDef_Init(&_structmodule);
-}