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# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
from __future__ import absolute_import
import cffi
c_source = """
struct ArrowSchema {
// Array type description
const char* format;
const char* name;
const char* metadata;
int64_t flags;
int64_t n_children;
struct ArrowSchema** children;
struct ArrowSchema* dictionary;
// Release callback
void (*release)(struct ArrowSchema*);
// Opaque producer-specific data
void* private_data;
};
struct ArrowArray {
// Array data description
int64_t length;
int64_t null_count;
int64_t offset;
int64_t n_buffers;
int64_t n_children;
const void** buffers;
struct ArrowArray** children;
struct ArrowArray* dictionary;
// Release callback
void (*release)(struct ArrowArray*);
// Opaque producer-specific data
void* private_data;
};
struct ArrowArrayStream {
int (*get_schema)(struct ArrowArrayStream*, struct ArrowSchema* out);
int (*get_next)(struct ArrowArrayStream*, struct ArrowArray* out);
const char* (*get_last_error)(struct ArrowArrayStream*);
// Release callback
void (*release)(struct ArrowArrayStream*);
// Opaque producer-specific data
void* private_data;
};
"""
# TODO use out-of-line mode for faster import and avoid C parsing
ffi = cffi.FFI()
ffi.cdef(c_source)
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