48 lines
1.3 KiB
Cython
48 lines
1.3 KiB
Cython
# distutils: sources = mdevaluate/gromacs/compression.c
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from cython cimport view
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from array import array
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import numpy as np
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cimport numpy as np
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cdef extern from "compression.h":
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int xdrfile_decompress_coord_float(float *coordinates,
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int size,
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float precision,
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int minint[3],
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int maxint[3],
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int smallidx,
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char * compressed_blob,
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size_t blob_len,
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size_t * readed_len)
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def decompress(int size, float precision, minint, maxint, int smallidx, bytes blob):
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assert len(minint) == 3
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assert len(maxint) == 3
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cdef int minints[3]
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cdef int maxints[3]
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for i in range(3):
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minints[i] = minint[i]
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maxints[i] = maxint[i]
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cdef np.ndarray[float, ndim=2] coordinates = np.empty((size,3), dtype=np.float32)
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cdef size_t readed
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xdrfile_decompress_coord_float(
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<float *>coordinates.data,
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size,
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precision,
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maxints,
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minints,
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smallidx,
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blob,
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len(blob),
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&readed)
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return coordinates
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