ok.
Can i see any demo code about hashlib-pypy ??
------------------ ???????? ------------------
??????: "Maciej Fijalkowski";<fij...@gmail.com>;
????????: 2013??11??8??(??????) ????4:51
??????: "KaShining"<mail2sh...@qq.com>;
????: "pypy-dev"<pypy-dev@python.org>;
????: Re: ?????? [pypy-dev] fail about resumable hashlib code under pypy
this can work, but these days we have implemented hashlib differently., why?
On Fri, Nov 8, 2013 at 10:49 AM, KaShining <mail2sh...@qq.com> wrote:
> Maybe this way can work:
> https://bitbucket.org/pypy/pypy/src/cli-jit/pypy/lib/_hashlib.py?at=cli-jit
>
>
> ------------------ ???????? ------------------
> ??????: "Maciej Fijalkowski";<fij...@gmail.com>;
> ????????: 2013??11??8??(??????) ????4:47
> ??????: "KaShining"<mail2sh...@qq.com>;
> ????: "pypy-dev"<pypy-dev@python.org>;
> ????: Re: [pypy-dev] fail about resumable hashlib code under pypy
>
> PyPy objects are not implemented like this. This is an evil and
> atrocious hack to get the refcount and pyobjects stuff from python
> level using ctypes. works only on cpython.
>
> On Fri, Nov 8, 2013 at 10:02 AM, KaShining <mail2sh...@qq.com> wrote:
>> Here is my test.py about resumable-hashlib:
>>
>> from ctypes import *
>> import hashlib
>>
>> PyObject_HEAD = [
>> ('ob_refcnt', c_size_t),
>> ('ob_type', c_void_p),
>> ]
>>
>> class EVP_MD(Structure):
>> _fields_ = [
>> ('type', c_int),
>> ('pkey_type', c_int),
>> ('md_size', c_int),
>> ('flags', c_ulong),
>> ('init', c_void_p),
>> ('update', c_void_p),
>> ('final', c_void_p),
>> ('copy', c_void_p),
>> ('cleanup', c_void_p),
>> ('sign', c_void_p),
>> ('verify', c_void_p),
>> ('required_pkey_type', c_int*5),
>> ('block_size', c_int),
>> ('ctx_size', c_int),
>> ]
>>
>> class EVP_MD_CTX(Structure):
>> _fields_ = [
>> ('digest', POINTER(EVP_MD)),
>> ('engine', c_void_p),
>> ('flags', c_ulong),
>> ('md_data', POINTER(c_char)),
>> ]
>>
>> class EVPobject(Structure):
>> _fields_ = PyObject_HEAD + [
>> ('name', py_object),
>> ('ctx', EVP_MD_CTX),
>> ]
>>
>> #import string
>>
>> # str4096 = random_str(4096)
>> str4096 = 'sssss'
>>
>> hash2 = hashlib.sha1()
>> c_evp_obj = cast(c_void_p(id(hash2)), POINTER(EVPobject)).contents
>> ctx = c_evp_obj.ctx
>> digest = ctx.digest.contents
>> state = ctx.md_data[:digest.ctx_size]
>> #print digest.ctx_size
>>
>> Pass in cpython while fail in pypy:
>>
>> Traceback (most recent call last):
>> File "app_main.py", line 72, in run_toplevel
>> File "t.py", line 49, in <module>
>> digest = ctx.digest.contents
>> File "/opt/pypy2.1/lib_pypy/_ctypes/pointer.py", line 83, in getcontents
>> raise ValueError("NULL pointer access")
>> ValueError: NULL pointer access
>>
>>
>>
>>
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