projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 1d09f67e TL |
1 | # Licensed to the Apache Software Foundation (ASF) under one |
| 2 | # or more contributor license agreements. See the NOTICE file | |
| 3 | # distributed with this work for additional information | |
| 4 | # regarding copyright ownership. The ASF licenses this file | |
| 5 | # to you under the Apache License, Version 2.0 (the | |
| 6 | # "License"); you may not use this file except in compliance | |
| 7 | # with the License. You may obtain a copy of the License at | |
| 8 | # | |
| 9 | # http://www.apache.org/licenses/LICENSE-2.0 | |
| 10 | # | |
| 11 | # Unless required by applicable law or agreed to in writing, | |
| 12 | # software distributed under the License is distributed on an | |
| 13 | # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 14 | # KIND, either express or implied. See the License for the | |
| 15 | # specific language governing permissions and limitations | |
| 16 | # under the License. | |
| 17 | ||
| 18 | from __future__ import absolute_import | |
| 19 | ||
| 20 | import cffi | |
| 21 | ||
| 22 | c_source = """ | |
| 23 | struct ArrowSchema { | |
| 24 | // Array type description | |
| 25 | const char* format; | |
| 26 | const char* name; | |
| 27 | const char* metadata; | |
| 28 | int64_t flags; | |
| 29 | int64_t n_children; | |
| 30 | struct ArrowSchema** children; | |
| 31 | struct ArrowSchema* dictionary; | |
| 32 | ||
| 33 | // Release callback | |
| 34 | void (*release)(struct ArrowSchema*); | |
| 35 | // Opaque producer-specific data | |
| 36 | void* private_data; | |
| 37 | }; | |
| 38 | ||
| 39 | struct ArrowArray { | |
| 40 | // Array data description | |
| 41 | int64_t length; | |
| 42 | int64_t null_count; | |
| 43 | int64_t offset; | |
| 44 | int64_t n_buffers; | |
| 45 | int64_t n_children; | |
| 46 | const void** buffers; | |
| 47 | struct ArrowArray** children; | |
| 48 | struct ArrowArray* dictionary; | |
| 49 | ||
| 50 | // Release callback | |
| 51 | void (*release)(struct ArrowArray*); | |
| 52 | // Opaque producer-specific data | |
| 53 | void* private_data; | |
| 54 | }; | |
| 55 | ||
| 56 | struct ArrowArrayStream { | |
| 57 | int (*get_schema)(struct ArrowArrayStream*, struct ArrowSchema* out); | |
| 58 | int (*get_next)(struct ArrowArrayStream*, struct ArrowArray* out); | |
| 59 | ||
| 60 | const char* (*get_last_error)(struct ArrowArrayStream*); | |
| 61 | ||
| 62 | // Release callback | |
| 63 | void (*release)(struct ArrowArrayStream*); | |
| 64 | // Opaque producer-specific data | |
| 65 | void* private_data; | |
| 66 | }; | |
| 67 | """ | |
| 68 | ||
| 69 | # TODO use out-of-line mode for faster import and avoid C parsing | |
| 70 | ffi = cffi.FFI() | |
| 71 | ffi.cdef(c_source) |