msgpack/python/msgpack/_msgpack.pyx at java-0.5.1 · WanderWalker/msgpack · GitHub

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# coding: utf-8

from cpython cimport *

cdef extern from "Python.h":

ctypedef char* const_char_ptr "const char*"

ctypedef char* const_void_ptr "const void*"

ctypedef struct PyObject

cdef int PyObject_AsReadBuffer(object o, const_void_ptr* buff, Py_ssize_t* buf_len) except -1

from libc.stdlib cimport *

from libc.string cimport *

cdef extern from "pack.h":

struct msgpack_packer:

char* buf

size_t length

size_t buf_size

int msgpack_pack_int(msgpack_packer* pk, int d)

int msgpack_pack_nil(msgpack_packer* pk)

int msgpack_pack_true(msgpack_packer* pk)

int msgpack_pack_false(msgpack_packer* pk)

int msgpack_pack_long(msgpack_packer* pk, long d)

int msgpack_pack_long_long(msgpack_packer* pk, long long d)

int msgpack_pack_unsigned_long_long(msgpack_packer* pk, unsigned long long d)

int msgpack_pack_double(msgpack_packer* pk, double d)

int msgpack_pack_array(msgpack_packer* pk, size_t l)

int msgpack_pack_map(msgpack_packer* pk, size_t l)

int msgpack_pack_raw(msgpack_packer* pk, size_t l)

int msgpack_pack_raw_body(msgpack_packer* pk, char* body, size_t l)

cdef int DEFAULT_RECURSE_LIMIT=511

cdef class Packer(object):

"""MessagePack Packer

usage:

packer = Packer()

astream.write(packer.pack(a))

astream.write(packer.pack(b))

"""

cdef msgpack_packer pk

cdef object default

def __cinit__(self):

cdef int buf_size = 1024*1024

self.pk.buf = <char*> malloc(buf_size);

self.pk.buf_size = buf_size

self.pk.length = 0

def __init__(self, default=None):

if default is not None:

if not PyCallable_Check(default):

raise TypeError("default must be a callable.")

self.default = default

def __dealloc__(self):

free(self.pk.buf);

cdef int _pack(self, object o, int nest_limit=DEFAULT_RECURSE_LIMIT,

default=None) except -1:

cdef long long llval

cdef unsigned long long ullval

cdef long longval

cdef double fval

cdef char* rawval

cdef int ret

cdef dict d

if nest_limit < 0:

raise ValueError("Too deep.")

if o is None:

ret = msgpack_pack_nil(&self.pk)

#elif PyBool_Check(o):

elif isinstance(o, bool):

if o:

ret = msgpack_pack_true(&self.pk)

else:

ret = msgpack_pack_false(&self.pk)

elif PyLong_Check(o):

if o > 0:

ullval = o

ret = msgpack_pack_unsigned_long_long(&self.pk, ullval)

else:

llval = o

ret = msgpack_pack_long_long(&self.pk, llval)

elif PyInt_Check(o):

longval = o

ret = msgpack_pack_long(&self.pk, longval)

elif PyFloat_Check(o):

fval = o

ret = msgpack_pack_double(&self.pk, fval)

elif PyBytes_Check(o):

rawval = o

ret = msgpack_pack_raw(&self.pk, len(o))

if ret == 0:

ret = msgpack_pack_raw_body(&self.pk, rawval, len(o))

elif PyUnicode_Check(o):

o = PyUnicode_AsUTF8String(o)

rawval = o

ret = msgpack_pack_raw(&self.pk, len(o))

if ret == 0:

ret = msgpack_pack_raw_body(&self.pk, rawval, len(o))

elif PyDict_Check(o):

d = o

ret = msgpack_pack_map(&self.pk, len(d))

if ret == 0:

for k,v in d.items():

ret = self._pack(k, nest_limit-1, default)

if ret != 0: break

ret = self._pack(v, nest_limit-1, default)

if ret != 0: break

elif PySequence_Check(o):

ret = msgpack_pack_array(&self.pk, len(o))

if ret == 0:

for v in o:

ret = self._pack(v, nest_limit-1, default)

if ret != 0: break

elif default is not None:

o = self.default(o)

ret = self._pack(o, nest_limit)

else:

raise TypeError("can't serialize %r" % (o,))

return ret

def pack(self, object obj):

cdef int ret

ret = self._pack(obj, DEFAULT_RECURSE_LIMIT, self.default)

if ret:

raise TypeError

buf = PyBytes_FromStringAndSize(self.pk.buf, self.pk.length)

self.pk.length = 0

return buf

def pack(object o, object stream, default=None):

"""pack an object `o` and write it to stream)."""

packer = Packer(default=default)

stream.write(packer.pack(o))

def packb(object o, default=None):

"""pack o and return packed bytes."""

packer = Packer(default=default)

return packer.pack(o)

packs = packb

cdef extern from "unpack.h":

ctypedef struct msgpack_user:

int use_list

PyObject* object_hook

PyObject* list_hook

ctypedef struct template_context:

msgpack_user user

PyObject* obj

size_t count

unsigned int ct

PyObject* key

int template_execute(template_context* ctx, const_char_ptr data,

size_t len, size_t* off)

void template_init(template_context* ctx)

object template_data(template_context* ctx)

def unpackb(object packed, object object_hook=None, object list_hook=None):

"""Unpack packed_bytes to object. Returns an unpacked object."""

cdef template_context ctx

cdef size_t off = 0

cdef int ret

cdef char* buf

cdef Py_ssize_t buf_len

PyObject_AsReadBuffer(packed, <const_void_ptr*>&buf, &buf_len)

template_init(&ctx)

ctx.user.use_list = 0

ctx.user.object_hook = ctx.user.list_hook = NULL

if object_hook is not None:

if not PyCallable_Check(object_hook):

raise TypeError("object_hook must be a callable.")

ctx.user.object_hook = <PyObject*>object_hook

if list_hook is not None:

if not PyCallable_Check(list_hook):

raise TypeError("list_hook must be a callable.")

ctx.user.list_hook = <PyObject*>list_hook

ret = template_execute(&ctx, buf, buf_len, &off)

if ret == 1:

return template_data(&ctx)

else:

return None

unpacks = unpackb

def unpack(object stream, object object_hook=None, object list_hook=None):

"""unpack an object from stream."""

return unpackb(stream.read(),

object_hook=object_hook, list_hook=list_hook)

cdef class UnpackIterator(object):

cdef object unpacker

def __init__(self, unpacker):

self.unpacker = unpacker

def __next__(self):

return self.unpacker.unpack()

def __iter__(self):

return self

cdef class Unpacker(object):

"""Unpacker(read_size=1024*1024)

Streaming unpacker.

read_size is used like file_like.read(read_size)

example:

unpacker = Unpacker()

while 1:

buf = astream.read()

unpacker.feed(buf)

for o in unpacker:

do_something(o)

"""

cdef template_context ctx

cdef char* buf

cdef size_t buf_size, buf_head, buf_tail

cdef object file_like

cdef int read_size

cdef bint use_list

cdef object object_hook

def __cinit__(self):

self.buf = NULL

def __dealloc__(self):

free(self.buf);

def __init__(self, file_like=None, int read_size=0, bint use_list=0,

object object_hook=None, object list_hook=None):

if read_size == 0:

read_size = 1024*1024

self.use_list = use_list

self.file_like = file_like

self.read_size = read_size

self.buf = <char*>malloc(read_size)

self.buf_size = read_size

self.buf_head = 0

self.buf_tail = 0

template_init(&self.ctx)

self.ctx.user.use_list = use_list

self.ctx.user.object_hook = self.ctx.user.list_hook = <PyObject*>NULL

if object_hook is not None:

if not PyCallable_Check(object_hook):

raise TypeError("object_hook must be a callable.")

self.ctx.user.object_hook = <PyObject*>object_hook

if list_hook is not None:

if not PyCallable_Check(list_hook):

raise TypeError("object_hook must be a callable.")

self.ctx.user.list_hook = <PyObject*>list_hook

def feed(self, object next_bytes):

cdef char* buf

cdef Py_ssize_t buf_len

PyObject_AsReadBuffer(next_bytes, <const_void_ptr*>&buf, &buf_len)

self.append_buffer(buf, buf_len)

cdef append_buffer(self, void* _buf, Py_ssize_t _buf_len):

cdef:

char* buf = self.buf

size_t head = self.buf_head

size_t tail = self.buf_tail

size_t buf_size = self.buf_size

size_t new_size

if tail + _buf_len > buf_size:

if ((tail - head) + _buf_len)*2 < buf_size:

# move to front.

memmove(buf, buf + head, tail - head)

tail -= head

head = 0

else:

# expand buffer.

new_size = tail + _buf_len

if new_size < buf_size*2:

new_size = buf_size*2

buf = <char*>realloc(buf, new_size)

buf_size = new_size

memcpy(buf + tail, <char*>(_buf), _buf_len)

self.buf_head = head

self.buf_size = buf_size

self.buf_tail = tail + _buf_len

# prepare self.buf from file_like

cdef fill_buffer(self):

if self.file_like is not None:

next_bytes = self.file_like.read(self.read_size)

if next_bytes:

self.append_buffer(PyBytes_AsString(next_bytes),

PyBytes_Size(next_bytes))

else:

self.file_like = None

cpdef unpack(self):

"""unpack one object"""

cdef int ret

self.fill_buffer()

ret = template_execute(&self.ctx, self.buf, self.buf_tail, &self.buf_head)

if ret == 1:

o = template_data(&self.ctx)

template_init(&self.ctx)

return o

elif ret == 0:

if self.file_like is not None:

return self.unpack()

raise StopIteration, "No more unpack data."

else:

raise ValueError, "Unpack failed."

def __iter__(self):

return UnpackIterator(self)

# for debug.

#def _buf(self):

# return PyString_FromStringAndSize(self.buf, self.buf_tail)

#def _off(self):

# return self.buf_head

msgpack/python/msgpack/_msgpack.pyx at java-0.5.1 · WanderWalker/msgpack · GitHub

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