33 lines
877 B
Cython
33 lines
877 B
Cython
"""
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Simple buffer data structure that provides a view on existing memory
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(e.g. from a bytes object). This memory must stay alive while the
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buffer is in use.
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"""
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from cpython.bytes cimport PyBytes_AS_STRING
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# char* PyBytes_AS_STRING(object string)
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# Macro form of PyBytes_AsString() but without error
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# checking. Only string objects are supported; no Unicode objects
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# should be passed.
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from cassandra.buffer cimport Buffer
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cdef struct Buffer:
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char *ptr
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Py_ssize_t size
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cdef inline Buffer from_bytes(bytes byts):
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return from_ptr_and_size(PyBytes_AS_STRING(byts), len(byts))
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cdef inline bytes to_bytes(Buffer *buf):
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return buf.ptr[:buf.size]
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cdef inline char *buf_ptr(Buffer *buf):
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return buf.ptr
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cdef inline Buffer from_ptr_and_size(char *ptr, Py_ssize_t size):
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cdef Buffer res
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res.ptr = ptr
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res.size = size
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return res
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