a i‚j ã@shdZddlmZddlZddlmZdZdd„ZeƒZe dkrdd Z e e e ƒee ƒee ƒe e ƒfƒdS) a£Run-time calculation of offset into Python string structure Does a scan to find the digits of pi in a string structure in order to produce an offset that can be used to produce data-pointers from Python strings. Porting note: Currently this uses id( str a ) to get the base address of the Python string. Python implementations where id( a ) is *not* the memory address of the string will not work! é)Úprint_functionN)ÚbytesZ31415926535897931c sšd‰t}t|ƒ}t tj¡}tdƒD]J}t |||¡}d}t|ƒD]\}}|||krDd}qbqD|r$|‰qpq$ˆdurŽ‡fdd„}ˆ|_|St dƒ‚dS)a/Calculates the data-pointer offset for strings This does a sequential scan for 100 bytes from the id of a string to find special data-value stored in the string (the digits of PI). It produces a dataPointer function which adds that offset to the id of the passed strings. NédTFcs(t|tƒstdt|ƒfƒ‚t|ƒˆS)zÞReturn the data-pointer from the array using calculated offset data -- a Python string Returns the raw data-pointer to the internal buffer of the passed string z5This function can only handle Python strings! Got %s)Ú isinstancerÚ TypeErrorÚtypeÚid)Údata©Z finalOffset©úT/home/ghrups/robot-bench/.venv/lib/python3.9/site-packages/OpenGL/arrays/_strings.pyÚ dataPointer+s ÿÿz$calculateOffset..dataPointerz3Unable to determine dataPointer offset for strings!) Ú PI_DIGITSrÚctypesZPOINTERZc_charÚrangeÚcastÚ enumerateÚoffsetÚ RuntimeError) ÚaÚinitialZ targetTyperZvectorZ allMatchedÚindexÚdigitr r r r ÚcalculateOffsets*     ÿrÚ__main__Úthis) Ú__doc__Ú __future__rrZ OpenGL._bytesrrrr Ú__name__rÚprintrr r r r Ús  .