# Copyright 2015 Facebook, Inc.

# All rights reserved.

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are met:

#

#  * Redistributions of source code must retain the above copyright notice,

#    this list of conditions and the following disclaimer.

#

#  * Redistributions in binary form must reproduce the above copyright notice,

#    this list of conditions and the following disclaimer in the documentation

#    and/or other materials provided with the distribution.

#

#  * Neither the name Facebook nor the names of its contributors may be used to

#    endorse or promote products derived from this software without specific

#    prior written permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# no unicode literals

import binascii

import collections

import ctypes

import struct

import sys

if compat.PYTHON3:

    STRING_TYPES = (str, bytes)

    unicode = str

    def tobytes(i):

    long = int

else:

    STRING_TYPES = (unicode, str)

    tobytes = bytes

# Leave room for the serialization header, which includes

# our overall length.  To make things simpler, we'll use an

# int32 for the header

EMPTY_HEADER = b"\x00\x01\x05\x00\x00\x00\x00"

EMPTY_HEADER_V2 = b"\x00\x02\x00\x00\x00\x00\x05\x00\x00\x00\x00"

def _int_size(x):

    """Return the smallest size int that can store the value"""

    if -0x80 <= x <= 0x7F:

        return 1

    elif -0x8000 <= x <= 0x7FFF:

        return 2

    elif -0x80000000 <= x <= 0x7FFFFFFF:

        return 4

    elif long(-0x8000000000000000) <= x <= long(0x7FFFFFFFFFFFFFFF):

        return 8

    else:

def _buf_pos(buf, pos):

    ret = buf[pos]

        ret = bytes((ret,))

    return ret

class _bser_buffer(object):

    def __init__(self, version):

        self.bser_version = version

        self.buf = ctypes.create_string_buffer(8192)

        if self.bser_version == 1:

            self.wpos = len(EMPTY_HEADER)

        else:

            assert self.bser_version == 2

            self.wpos = len(EMPTY_HEADER_V2)

    def ensure_size(self, size):

        while ctypes.sizeof(self.buf) - self.wpos < size:

            ctypes.resize(self.buf, ctypes.sizeof(self.buf) * 2)

    def append_long(self, val):

        size = _int_size(val)

        to_write = size + 1

        self.ensure_size(to_write)

        if size == 1:

        elif size == 2:

        elif size == 4:

        elif size == 8:

        else:

        self.wpos += to_write

    def append_string(self, s):

        if isinstance(s, unicode):

        s_len = len(s)

        size = _int_size(s_len)

        to_write = 2 + size + s_len

        self.ensure_size(to_write)

        if size == 1:

        elif size == 2:

        elif size == 4:

        elif size == 8:

        else:

        self.wpos += to_write

    def append_recursive(self, val):

        if isinstance(val, bool):

            needed = 1

            self.ensure_size(needed)

            if val:

                to_encode = BSER_TRUE

            else:

                to_encode = BSER_FALSE

            self.wpos += needed

        elif val is None:

            needed = 1

            self.ensure_size(needed)

            self.wpos += needed

        elif isinstance(val, (int, long)):

            self.append_long(val)

        elif isinstance(val, STRING_TYPES):

            self.append_string(val)

        elif isinstance(val, float):

            needed = 9

            self.ensure_size(needed)

            self.wpos += needed

            val_len = len(val)

            size = _int_size(val_len)

            needed = 2 + size

            self.ensure_size(needed)

            if size == 1:

            elif size == 2:

            elif size == 4:

            elif size == 8:

            else:

            self.wpos += needed

            if compat.PYTHON3:

                iteritems = val.items()

            else:

            for k, v in iteritems:

                self.append_string(k)

                self.append_recursive(v)

            val_len = len(val)

            size = _int_size(val_len)

            needed = 2 + size

            self.ensure_size(needed)

            if size == 1:

            elif size == 2:

            elif size == 4:

            elif size == 8:

            else:

            self.wpos += needed

            for v in val:

                self.append_recursive(v)

        else:

def dumps(obj, version=1, capabilities=0):

    bser_buf = _bser_buffer(version=version)

    bser_buf.append_recursive(obj)

    # Now fill in the overall length

    if version == 1:

        obj_len = bser_buf.wpos - len(EMPTY_HEADER)

    else:

        obj_len = bser_buf.wpos - len(EMPTY_HEADER_V2)

# This is a quack-alike with the bserObjectType in bser.c

# It provides by getattr accessors and getitem for both index

# and name.

class _BunserDict(object):

    def __init__(self, keys, values):

        self._keys = keys

        self._values = values

    def __getattr__(self, name):

        return self.__getitem__(name)

    def __getitem__(self, key):

        if isinstance(key, (int, long)):

            return self._values[key]

            # hack^Wfeature to allow mercurial to use "st_size" to

            # reference "size"

            key = key[3:]

        try:

            return self._values[self._keys.index(key)]

        except ValueError:

    def __len__(self):

        return len(self._keys)

class Bunser(object):

    def __init__(self, mutable=True, value_encoding=None, value_errors=None):

        self.mutable = mutable

        self.value_encoding = value_encoding

        if value_encoding is None:

            self.value_errors = None

        elif value_errors is None:

        else:

            self.value_errors = value_errors

    @staticmethod

    def unser_int(buf, pos):

        try:

            int_type = _buf_pos(buf, pos)

        except IndexError:

        if int_type == BSER_INT8:

            needed = 2

        elif int_type == BSER_INT16:

            needed = 3

        elif int_type == BSER_INT32:

            needed = 5

        elif int_type == BSER_INT64:

            needed = 9

        else:

        int_val = struct.unpack_from(fmt, buf, pos + 1)[0]