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/pypy/module/_rawffi/buffer.py

https://bitbucket.org/pypy/pypy/
Python | 27 lines | 18 code | 8 blank | 1 comment | 0 complexity | ec2233fdb3c2aada08ab0f2709c33172 MD5 | raw file
Possible License(s): AGPL-3.0, BSD-3-Clause, Apache-2.0 
    

  1. from rpython.rlib.buffer import Buffer
    2. 

  2. from rpython.rtyper.lltypesystem import rffi
    3. 

  3. 

  4. # XXX not the most efficient implementation
    5. 

  5. 

  6. 

  7. class RawFFIBuffer(Buffer):
    8. 

  8.     _immutable_ = True
    9. 

  9. 

  10.     def __init__(self, datainstance):
    11. 

  11.         self.datainstance = datainstance
    12. 

  12.         self.readonly = False
    13. 

  13. 

  14.     def getlength(self):
    15. 

  15.         return self.datainstance.getrawsize()
    16. 

  16. 

  17.     def getitem(self, index):
    18. 

  18.         ll_buffer = self.datainstance.ll_buffer
    19. 

  19.         return ll_buffer[index]
    20. 

  20. 

  21.     def setitem(self, index, char):
    22. 

  22.         ll_buffer = self.datainstance.ll_buffer
    23. 

  23.         ll_buffer[index] = char
    24. 

  24. 

  25.     def get_raw_address(self):
    26. 

  26.         ll_buffer = self.datainstance.ll_buffer
    27. 

  27.         return rffi.cast(rffi.CCHARP, ll_buffer)
    28. 

  28.