U ?hE@sddlmZddlZeejjdZdaGdddaddZ Gdd d e Z dd d Z d d Z ddZdddZddZdS)) _ccallback_cNc@s eZdZdS)CDataN)__name__ __module__ __qualname__rrG/var/www/html/venv/lib/python3.8/site-packages/scipy/_lib/_ccallback.pyr srcCsDtdk r dSzddl}|atjaWntk r>daYnXdS)NrF)fficffiZFFIr ImportError)r rrr _import_cffi s r c@sneZdZdZdZdddZddZedd Zed d Z ed d Z ddZ e dddZ e dddZdS)LowLevelCallablea Low-level callback function. Parameters ---------- function : {PyCapsule, ctypes function pointer, cffi function pointer} Low-level callback function. user_data : {PyCapsule, ctypes void pointer, cffi void pointer} User data to pass on to the callback function. signature : str, optional Signature of the function. If omitted, determined from *function*, if possible. Attributes ---------- function Callback function given. user_data User data given. signature Signature of the function. Methods ------- from_cython Class method for constructing callables from Cython C-exported functions. Notes ----- The argument ``function`` can be one of: - PyCapsule, whose name contains the C function signature - ctypes function pointer - cffi function pointer The signature of the low-level callback must match one of those expected by the routine it is passed to. If constructing low-level functions from a PyCapsule, the name of the capsule must be the corresponding signature, in the format:: return_type (arg1_type, arg2_type, ...) For example:: "void (double)" "double (double, int *, void *)" The context of a PyCapsule passed in as ``function`` is used as ``user_data``, if an explicit value for ``user_data`` was not given. rNcCs ||||}t||||fSN)_parse_callbacktuple__new__)clsfunction user_data signatureitemrrr rTszLowLevelCallable.__new__cCsd|j|jS)NzLowLevelCallable({!r}, {!r}))formatrrselfrrr __repr__ZszLowLevelCallable.__repr__cCs t|dS)Nrr __getitem__rrrr r]szLowLevelCallable.functioncCs t|dS)Nrrrrr raszLowLevelCallable.user_datacCstt|dS)Nr)rZget_capsule_signaturerrrrrr reszLowLevelCallable.signaturecCs tdSr) ValueError)ridxrrr riszLowLevelCallable.__getitem__c Csxz|j|}Wn\tk r:}ztd|W5d}~XYn2tk rj}ztd||W5d}~XYnX||||S)a Create a low-level callback function from an exported Cython function. Parameters ---------- module : module Cython module where the exported function resides name : str Name of the exported function user_data : {PyCapsule, ctypes void pointer, cffi void pointer}, optional User data to pass on to the callback function. signature : str, optional Signature of the function. If omitted, determined from *function*. z?Given module is not a Cython module with __pyx_capi__ attributeNz4No function {!r} found in __pyx_capi__ of the module)Z __pyx_capi__AttributeErrorrKeyErrorr)rmodulenamerrrerrr from_cythonls"zLowLevelCallable.from_cythoncCstt|trt|d}nLt|tr8t||\}}n2t|trRt||\}}nt |rb|}nt dt|t j rt|}n:t|trt|}n&|dkrd}nt |r|}nt dt |||S)NrzMGiven input is not a callable or a low-level callable (pycapsule/ctypes/cffi)zNGiven user data is not a valid low-level void* pointer (pycapsule/ctypes/cffi))r isinstancerrr PyCFuncPtr_get_ctypes_funcr_get_cffi_funcrZ check_capsulerctypesc_void_p_get_ctypes_data_get_cffi_dataZget_raw_capsule)robjrrfunccontextrrr rs(         z LowLevelCallable._parse_callback)NN)NN)NN)rrr__doc__ __slots__rrpropertyrrrr classmethodr&rrrrr rs7     rcCspt|tjj}|dkrht|jd}t|jD].\}}|dkrN|t|7}q0|dt|7}q0|d7}||fS)Nz (rz, ))r+castr,value_typename_from_ctypesrestype enumerateZargtypes)r0rfunc_ptrjargrrr r)sr)cCsv|dkr dS|tjkrdS|j}d}|drD|d7}|dd}q$|drZ|dd}|dkrr|d d |7}|S) Nvoidzvoid *rZLP_rZc_r *)r+r,r startswith)rr$Z pointer_levelrrr r9s    r9cCst|tjjSr)r+r7r,r8datarrr r-sr-cCs4td|}|dkr,tt|dd}||fS)N uintptr_tz(*)rA)r r7ZgetctypeZtypeofreplace)r0rr<rrr r*s r*cCs td|S)NrF)r r7rDrrr r.sr.)N)N)rr+Z CFUNCTYPEr, __bases__r(r rr rrr)r9r-r*r.rrrr s