xref: /btstack/tool/btstack_event_generator.py (revision c37cd8f3d1350b92a2f66c31b2a5fcd75f8c91a4) 
1#!/usr/bin/env python
2# BlueKitchen GmbH (c) 2014
3
4import glob
5import re
6import sys
7import os
8
9import btstack_parser as parser
10
11meta_events = [
12    'ANCS',
13    'AVDTP',
14    'A2DP',
15    'AVRCP',
16    'GOEP',
17    'HFP',
18    'HSP',
19    'PBAP',
20    'LE',
21    'HID',
22    'HIDS',
23]
24
25supported_event_groups = meta_events + [
26    'BTSTACK',
27    'GAP',
28    'HCI',
29    'SDP',
30    'SM',
31    'L2CAP',
32    'RFCOMM',
33    'GATT',
34    'BNEP',
35    'ATT',
36    'HID',
37]
38
39program_info = '''
40BTstack Event Getter Generator for BTstack
41Copyright 2016, BlueKitchen GmbH
42'''
43
44copyright = """/*
45 * Copyright (C) 2016 BlueKitchen GmbH
46 *
47 * Redistribution and use in source and binary forms, with or without
48 * modification, are permitted provided that the following conditions
49 * are met:
50 *
51 * 1. Redistributions of source code must retain the above copyright
52 *    notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 *    notice, this list of conditions and the following disclaimer in the
55 *    documentation and/or other materials provided with the distribution.
56 * 3. Neither the name of the copyright holders nor the names of
57 *    contributors may be used to endorse or promote products derived
58 *    from this software without specific prior written permission.
59 * 4. Any redistribution, use, or modification is done solely for
60 *    personal benefit and not for any commercial purpose or for
61 *    monetary gain.
62 *
63 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
64 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
65 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
66 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
67 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
68 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
69 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
70 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
71 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
72 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
73 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
74 * SUCH DAMAGE.
75 *
76 * Please inquire about commercial licensing options at
77 * [email protected]
78 *
79 */
80"""
81
82hfile_header_begin = """
83
84/*
85 *  btstack_event.h
86 *
87 *  @brief BTstack event getter/setter
88 *  @note  Don't edit - generated by tool/btstack_event_generator.py
89 *
90 */
91
92#ifndef __BTSTACK_EVENT_H
93#define __BTSTACK_EVENT_H
94
95#if defined __cplusplus
96extern "C" {
97#endif
98
99#include "btstack_util.h"
100#include <stdint.h>
101
102#ifdef ENABLE_BLE
103#include "ble/gatt_client.h"
104#endif
105
106/* API_START */
107
108/**
109 * @brief Get event type
110 * @param event
111 * @return type of event
112 */
113static inline uint8_t hci_event_packet_get_type(const uint8_t * event){
114    return event[0];
115}
116
117"""
118
119hfile_header_end = """
120
121/* API_END */
122
123#if defined __cplusplus
124}
125#endif
126
127#endif // __BTSTACK_EVENT_H
128"""
129
130c_prototoype_simple_return = '''/**
131 * @brief {description}
132 * @param event packet
133 * @return {result_name}
134 * @note: btstack_type {format}
135 */
136static inline {result_type} {fn_name}(const uint8_t * event){{
137    {code}
138}}
139'''
140
141c_prototoype_struct_return = '''/**
142 * @brief {description}
143 * @param event packet
144 * @param Pointer to storage for {result_name}
145 * @note: btstack_type {format}
146 */
147static inline void {fn_name}(const uint8_t * event, {result_type} {result_name}){{
148    {code}
149}}
150'''
151
152c_prototoype_unsupported = '''/**
153 * @brief {description}
154 * @param event packet
155 * @return {result_name}
156 * @note: btstack_type {format}
157 */
158//  static inline {result_type} {fn_name}(const uint8_t * event){{
159//      not implemented yet
160//  }}
161'''
162
163meta_event_template = '''/***
164 * @brief Get subevent code for {meta_event} event
165 * @param event packet
166 * @return subevent_code
167 */
168static inline uint8_t hci_event_{meta_event}_meta_get_subevent_code(const uint8_t * event){{
169    return event[2];
170}}
171'''
172
173# global variables/defines
174# gen_path = '../src/btstack_event.h'
175
176defines = dict()
177defines_used = set()
178
179param_read = {
180    '1' : 'return event[{offset}];',
181    'J' : 'return event[{offset}];',
182    '2' : 'return little_endian_read_16(event, {offset});',
183    'L' : 'return little_endian_read_16(event, {offset});',
184    '3' : 'return little_endian_read_24(event, {offset});',
185    '4' : 'return little_endian_read_32(event, {offset});',
186    'H' : 'return little_endian_read_16(event, {offset});',
187    'B' : 'reverse_bd_addr(&event[{offset}], {result_name});',
188    'R' : 'return &event[{offset}];',
189    'N' : 'return (const char *) &event[{offset}];',
190    'T' : 'return (const char *) &event[{offset}];',
191    'D' : 'return (const uint8_t *) &event[{offset}];',
192    'Q' : 'reverse_bytes(&event[{offset}], {result_name}, 32);',
193    'V' : 'return &event[{offset}];',
194    'X' : 'gatt_client_deserialize_service(event, {offset}, {result_name});',
195    'Y' : 'gatt_client_deserialize_characteristic(event, {offset}, {result_name});',
196    'Z' : 'gatt_client_deserialize_characteristic_descriptor(event, {offset}, {result_name});',
197    'V' : 'return &event[{offset}];',
198}
199
200def c_type_for_btstack_type(type):
201    param_types = { '1' : 'uint8_t', '2' : 'uint16_t', '3' : 'uint32_t', '4' : 'uint32_t', 'H' : 'hci_con_handle_t', 'B' : 'bd_addr_t',
202                    'D' : 'const uint8_t *', 'E' : 'const uint8_t * ', 'N' : 'const char *' , 'P' : 'const uint8_t *', 'A' : 'const uint8_t *',
203                    'R' : 'const uint8_t *', 'S' : 'const uint8_t *',
204                    'J' : 'int', 'L' : 'int', 'V' : 'const uint8_t *', 'U' : 'BT_UUID',
205                    'Q' : 'uint8_t *',
206                    'X' : 'gatt_client_service_t *', 'Y' : 'gatt_client_characteristic_t *', 'Z' : 'gatt_client_characteristic_descriptor_t *',
207                    'T' : 'const char *'}
208    return param_types[type]
209
210def size_for_type(type):
211    param_sizes = { '1' : 1, '2' : 2, '3' : 3, '4' : 4, 'H' : 2, 'B' : 6, 'D' : 8, 'E' : 240, 'N' : 248, 'P' : 16, 'Q':32,
212                    'A' : 31, 'S' : -1, 'V': -1, 'J' : 1, 'L' : 2, 'U' : 16, 'X' : 20, 'Y' : 24, 'Z' : 18, 'T':-1}
213    return param_sizes[type]
214
215def format_function_name(event_name):
216    event_name = event_name.lower()
217    if 'event' in event_name:
218        return event_name;
219    return event_name+'_event'
220
221def template_for_type(field_type):
222    global c_prototoype_simple_return
223    global c_prototoype_struct_return
224    types_with_struct_return = "BQXYZ"
225    if field_type in types_with_struct_return:
226        return c_prototoype_struct_return
227    else:
228        return c_prototoype_simple_return
229
230def all_fields_supported(format):
231    global param_read
232    for f in format:
233        if not f in param_read:
234            return False
235    return True
236
237def create_getter(event_name, field_name, field_type, offset, supported):
238    global c_prototoype_unsupported
239    global param_read
240
241    description = "Get field %s from event %s" % (field_name, event_name.upper())
242    result_name = field_name
243    fn_name     = "%s_get_%s" % (event_name, field_name)
244    result_type = c_type_for_btstack_type(field_type)
245    template = c_prototoype_unsupported
246    code = ''
247    if supported and field_type in param_read:
248        template = template_for_type(field_type)
249        code = param_read[field_type].format(offset=offset, result_name=result_name)
250    return template.format(description=description, fn_name=fn_name, result_name=result_name, result_type=result_type, code=code, format=field_type)
251
252def is_le_event(event_group):
253    return event_group in ['GATT', 'ANCS', 'SM']
254
255def create_events(events):
256    global gen_path
257    global copyright
258    global hfile_header_begin
259    global hfile_header_end
260    global meta_event_template
261
262    with open(gen_path, 'wt') as fout:
263        fout.write(copyright)
264        fout.write(hfile_header_begin)
265
266        for meta_event in meta_events:
267            fout.write(meta_event_template.format(meta_event=meta_event.lower()))
268
269        for event_type, event_name, format, args in events:
270            parts = event_name.split("_")
271            event_group = parts[0]
272            if not event_group in supported_event_groups:
273                print("// %s " % event_name)
274                continue
275            # print(event_name)
276            base_name = format_function_name(event_name)
277            length_name = ''
278            offset = 2
279            offset_is_number = 1
280            offset_unknown = 0
281            supported = all_fields_supported(format)
282            last_variable_length_field_pos = ""
283            if is_le_event(event_group):
284                fout.write("#ifdef ENABLE_BLE\n")
285            if len(format) != len(args):
286                print(event_name.upper())
287                print ("Format %s does not match params %s " % (format, args))
288                print
289            for f, arg in zip(format, args):
290                field_name = arg
291                if field_name.lower() == 'subevent_code':
292                    offset += 1
293                    continue
294                if offset_unknown:
295                    print("Param after variable length field without preceding 'J' lenght field")
296                    break
297                field_type = f
298                text = create_getter(base_name, field_name, field_type, offset, supported)
299                fout.write(text)
300                if field_type in 'RT':
301                    break
302                if field_type in 'J':
303                    if offset_is_number:
304                        last_variable_length_field_pos = '%u' % offset
305                    else:
306                        last_variable_length_field_pos = offset
307                if field_type in 'V':
308                    if last_variable_length_field_pos >= 0:
309                        if offset_is_number:
310                            # convert to string
311                            offset = '%u' % offset
312                            offset_is_number = 0
313                        offset = offset + ' + event[%s]' % last_variable_length_field_pos
314                    else:
315                        offset_unknown = 1
316                else:
317                    if offset_is_number:
318                        offset += size_for_type(field_type)
319                    else:
320                        offset = offset + ' + %u' % size_for_type(field_type)
321            if is_le_event(event_group):
322                fout.write("#endif\n")
323            fout.write("\n")
324
325        fout.write(hfile_header_end)
326
327btstack_root = os.path.abspath(os.path.dirname(sys.argv[0]) + '/..')
328gen_path = btstack_root + '/src/btstack_event.h'
329
330print(program_info)
331
332# parse events
333(events, le_events, event_types) = parser.parse_events()
334
335# create event field accesors
336create_events(events + le_events)
337
338# done
339print('Done!')
340