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first working attempt

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jan 2025-04-12 12:06:36 -07:00
commit e2ba1390c6
8 changed files with 165 additions and 55 deletions
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test.py Normal file
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import ctypes
import pyarrow
from pyarrow.cffi import ffi
#c_schema = ffi.new('struct ArrowSchema*')
#c_array = ffi.new('struct ArrowArray*')
#ptr_schema = int(ffi.cast('uintptr_t', c_schema))
#ptr_array = int(ffi.cast('uintptr_t', c_array))
path = '/home/jan/projects/masque/test.gds'
#clib = ctypes.CDLL('./libklamath_rs_ext.so')
clib = ffi.dlopen('./libklamath_rs_ext.so')
ret_ptr_array = ffi.new('struct ArrowArray[]', 1)
ret_ptr_schema = ffi.new('struct ArrowSchema[]', 1)
ffi.cdef('void read_path(char* path, struct ArrowArray* array, struct ArrowSchema* schema);')
print(f'{ret_ptr_array[0]=}, {ret_ptr_schema[0]=}')
clib.read_path(path.encode(), ret_ptr_array, ret_ptr_schema)
ptr_schema = int(ffi.cast('uintptr_t', ret_ptr_schema))
ptr_array = int(ffi.cast('uintptr_t', ret_ptr_array))
print(f'{ret_ptr_array[0]=}, {ret_ptr_schema[0]=}')
print(f'python {ptr_array=:x} {ptr_schema=:x}')
#print(f'{ret_ptr_array[0].buffers=} {ret_ptr_schema[0][0]=}')
arr_new = pyarrow.Array._import_from_c(ptr_array, ptr_schema)