1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Author: Sven Gothel <sgothel@jausoft.com>
* Copyright (c) 2020 Gothel Software e.K.
* Copyright (c) 2020 ZAFENA AB
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "org_tinyb_BluetoothUtils.h"
#include <cstdint>
#include <cinttypes>
#include <time.h>
#include <jau/dfa_utf8_decode.hpp>
#include "helper_base.hpp"
static const int64_t NanoPerMilli = 1000000L;
static const int64_t MilliPerOne = 1000L;
/**
* See <http://man7.org/linux/man-pages/man2/clock_gettime.2.html>
* <p>
* Regarding avoiding kernel via VDSO,
* see <http://man7.org/linux/man-pages/man7/vdso.7.html>,
* clock_gettime seems to be well supported at least on kernel >= 4.4.
* Only bfin and sh are missing, while ia64 seems to be complicated.
*/
jlong Java_org_tinyb_BluetoothUtils_getCurrentMilliseconds(JNIEnv *env, jclass clazz) {
(void)env;
(void)clazz;
struct timespec t;
clock_gettime(CLOCK_MONOTONIC, &t);
int64_t res = t.tv_sec * MilliPerOne + t.tv_nsec / NanoPerMilli;
return (jlong)res;
}
jstring Java_org_tinyb_BluetoothUtils_decodeUTF8String(JNIEnv *env, jclass clazz, jbyteArray jbuffer, jint offset, jint size) {
(void)clazz;
const int buffer_size = env->GetArrayLength(jbuffer);
if( 0 == buffer_size ) {
return env->NewStringUTF("");
}
if( buffer_size < offset+size ) {
std::string msg("buffer.length "+std::to_string(buffer_size)+
" < offset "+std::to_string(offset)+
" + size "+std::to_string(size));
throw std::invalid_argument(msg.c_str());
}
std::string sres;
{
JNICriticalArray<uint8_t, jbyteArray> criticalArray(env); // RAII - release
uint8_t * buffer_ptr = criticalArray.get(jbuffer, criticalArray.Mode::NO_UPDATE_AND_RELEASE);
if( NULL == buffer_ptr ) {
throw std::invalid_argument("GetPrimitiveArrayCritical(byte array) is null");
}
sres = jau::dfa_utf8_decode(buffer_ptr+offset, static_cast<size_t>(size));
}
return jau::from_string_to_jstring(env, sres);
}
|
