| 1 | /* |
| 2 | * Babeltrace - CTF Utils |
| 3 | * |
| 4 | * Copyright (c) 2017 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 22 | * SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #define BT_LOG_TAG "PLUGIN-CTF-UTILS" |
| 26 | #include "logging.h" |
| 27 | |
| 28 | #include "utils.h" |
| 29 | |
| 30 | struct bt_stream_class *ctf_utils_borrow_stream_class_from_packet_header( |
| 31 | struct bt_trace *trace, |
| 32 | struct bt_field *packet_header_field) |
| 33 | { |
| 34 | struct bt_field *stream_id_field = NULL; |
| 35 | struct bt_stream_class *stream_class = NULL; |
| 36 | uint64_t stream_id = -1ULL; |
| 37 | int ret; |
| 38 | |
| 39 | if (!packet_header_field) { |
| 40 | goto single_stream_class; |
| 41 | } |
| 42 | |
| 43 | stream_id_field = bt_field_structure_borrow_field_by_name( |
| 44 | packet_header_field, "stream_id"); |
| 45 | if (!stream_id_field) { |
| 46 | goto single_stream_class; |
| 47 | } |
| 48 | |
| 49 | ret = bt_field_integer_unsigned_get_value(stream_id_field, |
| 50 | &stream_id); |
| 51 | if (ret) { |
| 52 | stream_id = -1ULL; |
| 53 | } |
| 54 | |
| 55 | if (stream_id == -1ULL) { |
| 56 | single_stream_class: |
| 57 | /* Single stream class */ |
| 58 | if (bt_trace_get_stream_class_count(trace) == 0) { |
| 59 | goto end; |
| 60 | } |
| 61 | |
| 62 | stream_class = bt_trace_borrow_stream_class_by_index(trace, 0); |
| 63 | } else { |
| 64 | stream_class = bt_trace_borrow_stream_class_by_id(trace, |
| 65 | stream_id); |
| 66 | } |
| 67 | |
| 68 | end: |
| 69 | return stream_class; |
| 70 | } |