C++ PyUnicode_READY函数代码示例

static int
join_append(WriterObj *self, PyObject *field, int quoted)
{
    unsigned int field_kind = -1;
    void *field_data = NULL;
    Py_ssize_t field_len = 0;
    Py_ssize_t rec_len;

    if (field != NULL) {
        if (PyUnicode_READY(field) == -1)
            return 0;
        field_kind = PyUnicode_KIND(field);
        field_data = PyUnicode_DATA(field);
        field_len = PyUnicode_GET_LENGTH(field);
    }
    rec_len = join_append_data(self, field_kind, field_data, field_len,
                               &quoted, 0);
    if (rec_len < 0)
        return 0;

    /* grow record buffer if necessary */
    if (!join_check_rec_size(self, rec_len))
        return 0;

    self->rec_len = join_append_data(self, field_kind, field_data, field_len,
                                     &quoted, 1);
    self->num_fields++;

    return 1;
}

static PyObject *
csv_register_dialect(PyObject *module, PyObject *args, PyObject *kwargs)
{
    PyObject *name_obj, *dialect_obj = NULL;
    PyObject *dialect;

    if (!PyArg_UnpackTuple(args, "", 1, 2, &name_obj, &dialect_obj))
        return NULL;
    if (!PyUnicode_Check(name_obj)) {
        PyErr_SetString(PyExc_TypeError,
                        "dialect name must be a string");
        return NULL;
    }
    if (PyUnicode_READY(name_obj) == -1)
        return NULL;
    dialect = _call_dialect(dialect_obj, kwargs);
    if (dialect == NULL)
        return NULL;
    if (PyDict_SetItem(_csvstate_global->dialects, name_obj, dialect) < 0) {
        Py_DECREF(dialect);
        return NULL;
    }
    Py_DECREF(dialect);
    Py_RETURN_NONE;
}

static PyObject *
zipimport_zipimporter_get_data_impl(ZipImporter *self, PyObject *path)
/*[clinic end generated code: output=65dc506aaa268436 input=fa6428b74843c4ae]*/
{
    PyObject *key;
    PyObject *toc_entry;
    Py_ssize_t path_start, path_len, len;

    if (self->archive == NULL) {
        PyErr_SetString(PyExc_ValueError,
                        "zipimporter.__init__() wasn't called");
        return NULL;
    }

#ifdef ALTSEP
    path = _PyObject_CallMethodId((PyObject *)&PyUnicode_Type, &PyId_replace,
                                  "OCC", path, ALTSEP, SEP);
    if (!path)
        return NULL;
#else
    Py_INCREF(path);
#endif
    if (PyUnicode_READY(path) == -1)
        goto error;

    path_len = PyUnicode_GET_LENGTH(path);

    len = PyUnicode_GET_LENGTH(self->archive);
    path_start = 0;
    if (PyUnicode_Tailmatch(path, self->archive, 0, len, -1)
        && PyUnicode_READ_CHAR(path, len) == SEP) {
        path_start = len + 1;
    }

    key = PyUnicode_Substring(path, path_start, path_len);
    if (key == NULL)
        goto error;
    toc_entry = PyDict_GetItem(self->files, key);
    if (toc_entry == NULL) {
        PyErr_SetFromErrnoWithFilenameObject(PyExc_OSError, key);
        Py_DECREF(key);
        goto error;
    }
    Py_DECREF(key);
    Py_DECREF(path);
    return get_data(self->archive, toc_entry);
  error:
    Py_DECREF(path);
    return NULL;
}

static PyObject *
zipimporter_get_data(PyObject *obj, PyObject *args)
{
    ZipImporter *self = (ZipImporter *)obj;
    PyObject *path, *key;
#ifdef ALTSEP
    _Py_IDENTIFIER(replace);
#endif
    PyObject *toc_entry;
    Py_ssize_t path_start, path_len, len;

    if (!PyArg_ParseTuple(args, "U:zipimporter.get_data", &path))
        return NULL;

#ifdef ALTSEP
    path = _PyObject_CallMethodId(path, &PyId_replace, "CC", ALTSEP, SEP);
    if (!path)
        return NULL;
#else
    Py_INCREF(path);
#endif
    if (PyUnicode_READY(path) == -1)
        goto error;

    path_len = PyUnicode_GET_LENGTH(path);

    len = PyUnicode_GET_LENGTH(self->archive);
    path_start = 0;
    if (PyUnicode_Tailmatch(path, self->archive, 0, len, -1)
        && PyUnicode_READ_CHAR(path, len) == SEP) {
        path_start = len + 1;
    }

    key = PyUnicode_Substring(path, path_start, path_len);
    if (key == NULL)
        goto error;
    toc_entry = PyDict_GetItem(self->files, key);
    if (toc_entry == NULL) {
        PyErr_SetFromErrnoWithFilenameObject(PyExc_IOError, key);
        Py_DECREF(key);
        goto error;
    }
    Py_DECREF(key);
    Py_DECREF(path);
    return get_data(self->archive, toc_entry);
  error:
    Py_DECREF(path);
    return NULL;
}

/* Intern selected string constants */
static int
intern_string_constants(PyObject *tuple)
{
    int modified = 0;
    Py_ssize_t i;

    for (i = PyTuple_GET_SIZE(tuple); --i >= 0; ) {
        PyObject *v = PyTuple_GET_ITEM(tuple, i);
        if (PyUnicode_CheckExact(v)) {
            if (PyUnicode_READY(v) == -1) {
                PyErr_Clear();
                continue;
            }
            if (all_name_chars(v)) {
                PyObject *w = v;
                PyUnicode_InternInPlace(&v);
                if (w != v) {
                    PyTuple_SET_ITEM(tuple, i, v);
                    modified = 1;
                }
            }
        }
        else if (PyTuple_CheckExact(v)) {
            intern_string_constants(v);
        }
        else if (PyFrozenSet_CheckExact(v)) {
            PyObject *w = v;
            PyObject *tmp = PySequence_Tuple(v);
            if (tmp == NULL) {
                PyErr_Clear();
                continue;
            }
            if (intern_string_constants(tmp)) {
                v = PyFrozenSet_New(tmp);
                if (v == NULL) {
                    PyErr_Clear();
                }
                else {
                    PyTuple_SET_ITEM(tuple, i, v);
                    Py_DECREF(w);
                    modified = 1;
                }
            }
            Py_DECREF(tmp);
        }
    }
    return modified;
}

static int
_set_str(const char *name, PyObject **target, PyObject *src, const char *dflt)
{
    if (src == NULL)
        *target = PyUnicode_DecodeASCII(dflt, strlen(dflt), NULL);
    else {
        if (src == Py_None)
            *target = NULL;
        else if (!PyUnicode_Check(src)) {
            PyErr_Format(PyExc_TypeError,
                         "\"%s\" must be a string", name);
            return -1;
        }
        else {
            if (PyUnicode_READY(src) == -1)
                return -1;
            Py_INCREF(src);
            Py_XSETREF(*target, src);
        }
    }
    return 0;
}

/* Verify that the identifier follows PEP 3131.
   All identifier strings are guaranteed to be "ready" unicode objects.
 */
static int
verify_identifier(struct tok_state *tok)
{
    PyObject *s;
    int result;
    if (tok->decoding_erred)
        return 0;
    s = PyUnicode_DecodeUTF8(tok->start, tok->cur - tok->start, NULL);
    if (s == NULL || PyUnicode_READY(s) == -1) {
        if (PyErr_ExceptionMatches(PyExc_UnicodeDecodeError)) {
            PyErr_Clear();
            tok->done = E_IDENTIFIER;
        } else {
            tok->done = E_ERROR;
        }
        return 0;
    }
    result = PyUnicode_IsIdentifier(s);
    Py_DECREF(s);
    if (result == 0)
        tok->done = E_IDENTIFIER;
    return result;
}

static int
all_name_chars(PyObject *o)
{
    static char ok_name_char[256];
    static unsigned char *name_chars = (unsigned char *)NAME_CHARS;
    PyUnicodeObject *u = (PyUnicodeObject *)o;
    const unsigned char *s;

    if (!PyUnicode_Check(o) || PyUnicode_READY(u) == -1 ||
        PyUnicode_MAX_CHAR_VALUE(u) >= 128)
        return 0;

    if (ok_name_char[*name_chars] == 0) {
        unsigned char *p;
        for (p = name_chars; *p; p++)
            ok_name_char[*p] = 1;
    }
    s = PyUnicode_1BYTE_DATA(u);
    while (*s) {
        if (ok_name_char[*s++] == 0)
            return 0;
    }
    return 1;
}

//.........这里部分代码省略.........
           these are characters that don't get formatted, only copied
           into the output string. We do this for 'c' formatting,
           because the characters are likely to be non-digits. */
        n_remainder = 1;
    }
    else {
        int base;
        int leading_chars_to_skip = 0;  /* Number of characters added by
                                           PyNumber_ToBase that we want to
                                           skip over. */

        /* Compute the base and how many characters will be added by
           PyNumber_ToBase */
        switch (format->type) {
        case 'b':
            base = 2;
            leading_chars_to_skip = 2; /* 0b */
            break;
        case 'o':
            base = 8;
            leading_chars_to_skip = 2; /* 0o */
            break;
        case 'x':
        case 'X':
            base = 16;
            leading_chars_to_skip = 2; /* 0x */
            break;
        default:  /* shouldn't be needed, but stops a compiler warning */
        case 'd':
        case 'n':
            base = 10;
            break;
        }

        if (format->sign != '+' && format->sign != ' '
            && format->width == -1
            && format->type != 'X' && format->type != 'n'
            && !format->thousands_separators
            && PyLong_CheckExact(value))
        {
            /* Fast path */
            return _PyLong_FormatWriter(writer, value, base, format->alternate);
        }

        /* The number of prefix chars is the same as the leading
           chars to skip */
        if (format->alternate)
            n_prefix = leading_chars_to_skip;

        /* Do the hard part, converting to a string in a given base */
        tmp = _PyLong_Format(value, base);
        if (tmp == NULL || PyUnicode_READY(tmp) == -1)
            goto done;

        inumeric_chars = 0;
        n_digits = PyUnicode_GET_LENGTH(tmp);

        prefix = inumeric_chars;

        /* Is a sign character present in the output?  If so, remember it
           and skip it */
        if (PyUnicode_READ_CHAR(tmp, inumeric_chars) == '-') {
            sign_char = '-';
            ++prefix;
            ++leading_chars_to_skip;
        }

        /* Skip over the leading chars (0x, 0b, etc.) */
        n_digits -= leading_chars_to_skip;
        inumeric_chars += leading_chars_to_skip;
    }

    /* Determine the grouping, separator, and decimal point, if any. */
    if (get_locale_info(format->type == 'n' ? LT_CURRENT_LOCALE :
                        (format->thousands_separators ?
                         LT_DEFAULT_LOCALE :
                         LT_NO_LOCALE),
                        &locale) == -1)
        goto done;

    /* Calculate how much memory we'll need. */
    n_total = calc_number_widths(&spec, n_prefix, sign_char, tmp, inumeric_chars,
                                 inumeric_chars + n_digits, n_remainder, 0,
                                 &locale, format, &maxchar);

    /* Allocate the memory. */
    if (_PyUnicodeWriter_Prepare(writer, n_total, maxchar) == -1)
        goto done;

    /* Populate the memory. */
    result = fill_number(writer, &spec,
                         tmp, inumeric_chars, inumeric_chars + n_digits,
                         tmp, prefix, format->fill_char,
                         &locale, format->type == 'X');

done:
    Py_XDECREF(tmp);
    free_locale_info(&locale);
    return result;
}

/* Fill in the digit parts of a numbers's string representation,
   as determined in calc_number_widths().
   Return -1 on error, or 0 on success. */
static int
fill_number(_PyUnicodeWriter *writer, const NumberFieldWidths *spec,
            PyObject *digits, Py_ssize_t d_start, Py_ssize_t d_end,
            PyObject *prefix, Py_ssize_t p_start,
            Py_UCS4 fill_char,
            LocaleInfo *locale, int toupper)
{
    /* Used to keep track of digits, decimal, and remainder. */
    Py_ssize_t d_pos = d_start;
    const unsigned int kind = writer->kind;
    const void *data = writer->data;
    Py_ssize_t r;

    if (spec->n_lpadding) {
        _PyUnicode_FastFill(writer->buffer,
                            writer->pos, spec->n_lpadding, fill_char);
        writer->pos += spec->n_lpadding;
    }
    if (spec->n_sign == 1) {
        PyUnicode_WRITE(kind, data, writer->pos, spec->sign);
        writer->pos++;
    }
    if (spec->n_prefix) {
        _PyUnicode_FastCopyCharacters(writer->buffer, writer->pos,
                                      prefix, p_start,
                                      spec->n_prefix);
        if (toupper) {
            Py_ssize_t t;
            for (t = 0; t < spec->n_prefix; t++) {
                Py_UCS4 c = PyUnicode_READ(kind, data, writer->pos + t);
                c = Py_TOUPPER(c);
                assert (c <= 127);
                PyUnicode_WRITE(kind, data, writer->pos + t, c);
            }
        }
        writer->pos += spec->n_prefix;
    }
    if (spec->n_spadding) {
        _PyUnicode_FastFill(writer->buffer,
                            writer->pos, spec->n_spadding, fill_char);
        writer->pos += spec->n_spadding;
    }

    /* Only for type 'c' special case, it has no digits. */
    if (spec->n_digits != 0) {
        /* Fill the digits with InsertThousandsGrouping. */
        char *pdigits;
        if (PyUnicode_READY(digits))
            return -1;
        pdigits = PyUnicode_DATA(digits);
        if (PyUnicode_KIND(digits) < kind) {
            pdigits = _PyUnicode_AsKind(digits, kind);
            if (pdigits == NULL)
                return -1;
        }
        r = _PyUnicode_InsertThousandsGrouping(
                writer->buffer, writer->pos,
                spec->n_grouped_digits,
                pdigits + kind * d_pos,
                spec->n_digits, spec->n_min_width,
                locale->grouping, locale->thousands_sep, NULL);
        if (r == -1)
            return -1;
        assert(r == spec->n_grouped_digits);
        if (PyUnicode_KIND(digits) < kind)
            PyMem_Free(pdigits);
        d_pos += spec->n_digits;
    }
    if (toupper) {
        Py_ssize_t t;
        for (t = 0; t < spec->n_grouped_digits; t++) {
            Py_UCS4 c = PyUnicode_READ(kind, data, writer->pos + t);
            c = Py_TOUPPER(c);
            if (c > 127) {
                PyErr_SetString(PyExc_SystemError, "non-ascii grouped digit");
                return -1;
            }
            PyUnicode_WRITE(kind, data, writer->pos + t, c);
        }
    }
    writer->pos += spec->n_grouped_digits;

    if (spec->n_decimal) {
        _PyUnicode_FastCopyCharacters(
            writer->buffer, writer->pos,
            locale->decimal_point, 0, spec->n_decimal);
        writer->pos += spec->n_decimal;
        d_pos += 1;
    }

    if (spec->n_remainder) {
        _PyUnicode_FastCopyCharacters(
            writer->buffer, writer->pos,
            digits, d_pos, spec->n_remainder);
        writer->pos += spec->n_remainder;
        /* d_pos += spec->n_remainder; */
    }
//.........这里部分代码省略.........

PyCodeObject *
PyCode_New(int argcount, int kwonlyargcount,
           int nlocals, int stacksize, int flags,
           PyObject *code, PyObject *consts, PyObject *names,
           PyObject *varnames, PyObject *freevars, PyObject *cellvars,
           PyObject *filename, PyObject *name, int firstlineno,
           PyObject *lnotab)
{
    PyCodeObject *co;
    unsigned char *cell2arg = NULL;
    Py_ssize_t i, n_cellvars;

    /* Check argument types */
    if (argcount < 0 || kwonlyargcount < 0 || nlocals < 0 ||
        code == NULL ||
        consts == NULL || !PyTuple_Check(consts) ||
        names == NULL || !PyTuple_Check(names) ||
        varnames == NULL || !PyTuple_Check(varnames) ||
        freevars == NULL || !PyTuple_Check(freevars) ||
        cellvars == NULL || !PyTuple_Check(cellvars) ||
        name == NULL || !PyUnicode_Check(name) ||
        filename == NULL || !PyUnicode_Check(filename) ||
        lnotab == NULL || !PyBytes_Check(lnotab) ||
        !PyObject_CheckReadBuffer(code)) {
        PyErr_BadInternalCall();
        return NULL;
    }

    /* Ensure that the filename is a ready Unicode string */
    if (PyUnicode_READY(filename) < 0)
        return NULL;

    n_cellvars = PyTuple_GET_SIZE(cellvars);
    intern_strings(names);
    intern_strings(varnames);
    intern_strings(freevars);
    intern_strings(cellvars);
    /* Intern selected string constants */
    for (i = PyTuple_GET_SIZE(consts); --i >= 0; ) {
        PyObject *v = PyTuple_GetItem(consts, i);
        if (!all_name_chars(v))
            continue;
        PyUnicode_InternInPlace(&PyTuple_GET_ITEM(consts, i));
    }
    /* Create mapping between cells and arguments if needed. */
    if (n_cellvars) {
        Py_ssize_t total_args = argcount + kwonlyargcount +
            ((flags & CO_VARARGS) != 0) + ((flags & CO_VARKEYWORDS) != 0);
        Py_ssize_t alloc_size = sizeof(unsigned char) * n_cellvars;
        int used_cell2arg = 0;
        cell2arg = PyMem_MALLOC(alloc_size);
        if (cell2arg == NULL)
            return NULL;
        memset(cell2arg, CO_CELL_NOT_AN_ARG, alloc_size);
        /* Find cells which are also arguments. */
        for (i = 0; i < n_cellvars; i++) {
            Py_ssize_t j;
            PyObject *cell = PyTuple_GET_ITEM(cellvars, i);
            for (j = 0; j < total_args; j++) {
                PyObject *arg = PyTuple_GET_ITEM(varnames, j);
                if (!PyUnicode_Compare(cell, arg)) {
                    cell2arg[i] = j;
                    used_cell2arg = 1;
                    break;
                }
            }
        }
        if (!used_cell2arg) {
            PyMem_FREE(cell2arg);
            cell2arg = NULL;
        }
    }
    co = PyObject_NEW(PyCodeObject, &PyCode_Type);
    if (co == NULL) {
        if (cell2arg)
            PyMem_FREE(cell2arg);
        return NULL;
    }
    co->co_argcount = argcount;
    co->co_kwonlyargcount = kwonlyargcount;
    co->co_nlocals = nlocals;
    co->co_stacksize = stacksize;
    co->co_flags = flags;
    Py_INCREF(code);
    co->co_code = code;
    Py_INCREF(consts);
    co->co_consts = consts;
    Py_INCREF(names);
    co->co_names = names;
    Py_INCREF(varnames);
    co->co_varnames = varnames;
    Py_INCREF(freevars);
    co->co_freevars = freevars;
    Py_INCREF(cellvars);
    co->co_cellvars = cellvars;
    co->co_cell2arg = cell2arg;
    Py_INCREF(filename);
    co->co_filename = filename;
    Py_INCREF(name);
    co->co_name = name;
//.........这里部分代码省略.........

static PyObject *
zipimport_zipimporter_load_module_impl(ZipImporter *self, PyObject *fullname)
/*[clinic end generated code: output=7303cebf88d47953 input=c236e2e8621f04ef]*/
{
    PyObject *code = NULL, *mod, *dict;
    PyObject *modpath = NULL;
    int ispackage;

    if (PyUnicode_READY(fullname) == -1)
        return NULL;

    code = get_module_code(self, fullname, &ispackage, &modpath);
    if (code == NULL)
        goto error;

    mod = PyImport_AddModuleObject(fullname);
    if (mod == NULL)
        goto error;
    dict = PyModule_GetDict(mod);

    /* mod.__loader__ = self */
    if (PyDict_SetItemString(dict, "__loader__", (PyObject *)self) != 0)
        goto error;

    if (ispackage) {
        /* add __path__ to the module *before* the code gets
           executed */
        PyObject *pkgpath, *fullpath, *subname;
        int err;

        subname = get_subname(fullname);
        if (subname == NULL)
            goto error;

        fullpath = PyUnicode_FromFormat("%U%c%U%U",
                                self->archive, SEP,
                                self->prefix, subname);
        Py_DECREF(subname);
        if (fullpath == NULL)
            goto error;

        pkgpath = Py_BuildValue("[N]", fullpath);
        if (pkgpath == NULL)
            goto error;
        err = PyDict_SetItemString(dict, "__path__", pkgpath);
        Py_DECREF(pkgpath);
        if (err != 0)
            goto error;
    }
    mod = PyImport_ExecCodeModuleObject(fullname, code, modpath, NULL);
    Py_CLEAR(code);
    if (mod == NULL)
        goto error;

    if (Py_VerboseFlag)
        PySys_FormatStderr("import %U # loaded from Zip %U\n",
                           fullname, modpath);
    Py_DECREF(modpath);
    return mod;
error:
    Py_XDECREF(code);
    Py_XDECREF(modpath);
    return NULL;
}

static PyObject *
Reader_iternext(ReaderObj *self)
{
    PyObject *fields = NULL;
    Py_UCS4 c;
    Py_ssize_t pos, linelen;
    unsigned int kind;
    void *data;
    PyObject *lineobj;

    if (parse_reset(self) < 0)
        return NULL;
    do {
        lineobj = PyIter_Next(self->input_iter);
        if (lineobj == NULL) {
            /* End of input OR exception */
            if (!PyErr_Occurred() && (self->field_len != 0 ||
                                      self->state == IN_QUOTED_FIELD)) {
                if (self->dialect->strict)
                    PyErr_SetString(_csvstate_global->error_obj,
                                    "unexpected end of data");
                else if (parse_save_field(self) >= 0)
                    break;
            }
            return NULL;
        }
        if (!PyUnicode_Check(lineobj)) {
            PyErr_Format(_csvstate_global->error_obj,
                         "iterator should return strings, "
                         "not %.200s "
                         "(did you open the file in text mode?)",
                         lineobj->ob_type->tp_name
                );
            Py_DECREF(lineobj);
            return NULL;
        }
        if (PyUnicode_READY(lineobj) == -1) {
            Py_DECREF(lineobj);
            return NULL;
        }
        ++self->line_num;
        kind = PyUnicode_KIND(lineobj);
        data = PyUnicode_DATA(lineobj);
        pos = 0;
        linelen = PyUnicode_GET_LENGTH(lineobj);
        while (linelen--) {
            c = PyUnicode_READ(kind, data, pos);
            if (c == '\0') {
                Py_DECREF(lineobj);
                PyErr_Format(_csvstate_global->error_obj,
                             "line contains NULL byte");
                goto err;
            }
            if (parse_process_char(self, c) < 0) {
                Py_DECREF(lineobj);
                goto err;
            }
            pos++;
        }
        Py_DECREF(lineobj);
        if (parse_process_char(self, 0) < 0)
            goto err;
    } while (self->state != START_RECORD);

    fields = self->fields;
    self->fields = NULL;
err:
    return fields;
}

static PyObject *
parse(PyObject *self, PyObject *args, PyObject *kwargs)
{
    PyObject *string;

    if (!PyArg_ParseTuple(args, "U", &string))
        return NULL;

    if (PyUnicode_READY(string) == -1)
        return NULL;

    Py_ssize_t string_length = PyUnicode_GET_LENGTH(string);
    int        string_kind   = PyUnicode_KIND(string);
    void      *string_data   = PyUnicode_DATA(string);

    Py_UCS4 c;
    int i;

    Symbol token = {.kind = UNDECIDED, .data=NULL};
    int escape = 0;

    for (i = 0; i < string_length; i++) {
        c = PyUnicode_READ(string_kind, string_data, i);

        switch (c) {
        case 0x22: // "
            if (escape) {

            } else {

            }

            break;

        case 0x27: // '
            if (escape) {

            } else {

            }

            break;

        case 0x30:
        case 0x31:
        case 0x32:
        case 0x33:
        case 0x34:
        case 0x35:
        case 0x36:
        case 0x37:
        case 0x38:
        case 0x39:
            switch (token.kind) {
            case UNDECIDED:
                token.kind = INTEGER;
                token.data = c - 0x30;
                break;

            case INTEGER:
                token.data += (c - 0x30);
                break;

            }

        case 0x5c: // backslash
            if (escape) {
                printf("todo literal backslash\n");
                escape = 0;
            } else {
                escape = 1;
            }

            break;

        CASE__WHITE_SPACE:
            switch (token.kind) {
            case INTEGER:
            case IDENTIFIER:
                printf("whitespace new token\n");
                break;
            }

            break;

        CASE__XID_START:
            switch (token.kind) {
            case UNDECIDED:
                token.kind = IDENTIFIER;
                break;

            case INTEGER:
                printf("todo\n");
                break;
            }

            break;

        CASE__XID_CONTINUE__EXCLUDING__XID_START:
            switch (token.kind) {
//.........这里部分代码省略.........

static int
zipimport_zipimporter___init___impl(ZipImporter *self, PyObject *path)
/*[clinic end generated code: output=141558fefdb46dc8 input=92b9ebeed1f6a704]*/
{
    PyObject *files, *tmp;
    PyObject *filename = NULL;
    Py_ssize_t len, flen;

    if (PyUnicode_READY(path) == -1)
        return -1;

    len = PyUnicode_GET_LENGTH(path);
    if (len == 0) {
        PyErr_SetString(ZipImportError, "archive path is empty");
        goto error;
    }

#ifdef ALTSEP
    tmp = _PyObject_CallMethodId(path, &PyId_replace, "CC", ALTSEP, SEP);
    if (!tmp)
        goto error;
    Py_DECREF(path);
    path = tmp;
#endif

    filename = path;
    Py_INCREF(filename);
    flen = len;
    for (;;) {
        struct stat statbuf;
        int rv;

        rv = _Py_stat(filename, &statbuf);
        if (rv == -2)
            goto error;
        if (rv == 0) {
            /* it exists */
            if (!S_ISREG(statbuf.st_mode))
                /* it's a not file */
                Py_CLEAR(filename);
            break;
        }
        Py_CLEAR(filename);
        /* back up one path element */
        flen = PyUnicode_FindChar(path, SEP, 0, flen, -1);
        if (flen == -1)
            break;
        filename = PyUnicode_Substring(path, 0, flen);
        if (filename == NULL)
            goto error;
    }
    if (filename == NULL) {
        PyErr_SetString(ZipImportError, "not a Zip file");
        goto error;
    }

    if (PyUnicode_READY(filename) < 0)
        goto error;

    files = PyDict_GetItem(zip_directory_cache, filename);
    if (files == NULL) {
        files = read_directory(filename);
        if (files == NULL)
            goto error;
        if (PyDict_SetItem(zip_directory_cache, filename, files) != 0)
            goto error;
    }
    else
        Py_INCREF(files);
    Py_XSETREF(self->files, files);

    /* Transfer reference */
    Py_XSETREF(self->archive, filename);
    filename = NULL;

    /* Check if there is a prefix directory following the filename. */
    if (flen != len) {
        tmp = PyUnicode_Substring(path, flen+1,
                                  PyUnicode_GET_LENGTH(path));
        if (tmp == NULL)
            goto error;
        Py_XSETREF(self->prefix, tmp);
        if (PyUnicode_READ_CHAR(path, len-1) != SEP) {
            /* add trailing SEP */
            tmp = PyUnicode_FromFormat("%U%c", self->prefix, SEP);
            if (tmp == NULL)
                goto error;
            Py_SETREF(self->prefix, tmp);
        }
    }
    else {
        Py_XSETREF(self->prefix, PyUnicode_New(0, 0));
    }
    Py_DECREF(path);
    return 0;

error:
    Py_DECREF(path);
    Py_XDECREF(filename);
    return -1;
//.........这里部分代码省略.........