Maxim Integrated / Mbed OS MAXREFDES155#

DeepCover Embedded Security in IoT: Public-key Secured Data Paths

Dependencies:   MaximInterface

The MAXREFDES155# is an internet-of-things (IoT) embedded-security reference design, built to authenticate and control a sensing node using elliptic-curve-based public-key cryptography with control and notification from a web server.

The hardware includes an ARM® mbed™ shield and attached sensor endpoint. The shield contains a DS2476 DeepCover® ECDSA/SHA-2 coprocessor, Wifi communication, LCD push-button controls, and status LEDs. The sensor endpoint is attached to the shield using a 300mm cable and contains a DS28C36 DeepCover ECDSA/SHA-2 authenticator, IR-thermal sensor, and aiming laser for the IR sensor. The MAXREFDES155# is equipped with a standard Arduino® form-factor shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The combination of these two devices represent an IoT device. Communication to the web server is accomplished with the shield Wifi circuitry. Communication from the shield to the attached sensor module is accomplished over I2C . The sensor module represents an IoT endpoint that generates small data with a requirement for message authenticity/integrity and secure on/off operational control.

The design is hierarchical with each mbed platform and shield communicating data from the sensor node to a web server that maintains a centralized log and dispatches notifications as necessary. The simplicity of this design enables rapid integration into any star-topology IoT network to provide security with the low overhead and cost provided by the ECDSA-P256 asymmetric-key and SHA-256 symmetric-key algorithms.

More information about the MAXREFDES155# is available on the Maxim Integrated website.

rapidjson/internal/itoa.h@0:33d4e66780c0, 2017-02-24 (annotated)

Committer:
IanBenzMaxim
Date:
Fri Feb 24 11:23:12 2017 -0600
Revision:
0:33d4e66780c0
Initial commit.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 0:33d4e66780c0 1 // Tencent is pleased to support the open source community by making RapidJSON available.
IanBenzMaxim 0:33d4e66780c0 2 //
IanBenzMaxim 0:33d4e66780c0 3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
IanBenzMaxim 0:33d4e66780c0 4 //
IanBenzMaxim 0:33d4e66780c0 5 // Licensed under the MIT License (the "License"); you may not use this file except
IanBenzMaxim 0:33d4e66780c0 6 // in compliance with the License. You may obtain a copy of the License at
IanBenzMaxim 0:33d4e66780c0 7 //
IanBenzMaxim 0:33d4e66780c0 8 // http://opensource.org/licenses/MIT
IanBenzMaxim 0:33d4e66780c0 9 //
IanBenzMaxim 0:33d4e66780c0 10 // Unless required by applicable law or agreed to in writing, software distributed
IanBenzMaxim 0:33d4e66780c0 11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
IanBenzMaxim 0:33d4e66780c0 12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the
IanBenzMaxim 0:33d4e66780c0 13 // specific language governing permissions and limitations under the License.
IanBenzMaxim 0:33d4e66780c0 14
IanBenzMaxim 0:33d4e66780c0 15 #ifndef RAPIDJSON_ITOA_
IanBenzMaxim 0:33d4e66780c0 16 #define RAPIDJSON_ITOA_
IanBenzMaxim 0:33d4e66780c0 17
IanBenzMaxim 0:33d4e66780c0 18 #include "../rapidjson.h"
IanBenzMaxim 0:33d4e66780c0 19
IanBenzMaxim 0:33d4e66780c0 20 RAPIDJSON_NAMESPACE_BEGIN
IanBenzMaxim 0:33d4e66780c0 21 namespace internal {
IanBenzMaxim 0:33d4e66780c0 22
IanBenzMaxim 0:33d4e66780c0 23 inline const char* GetDigitsLut() {
IanBenzMaxim 0:33d4e66780c0 24 static const char cDigitsLut[200] = {
IanBenzMaxim 0:33d4e66780c0 25 '0','0','0','1','0','2','0','3','0','4','0','5','0','6','0','7','0','8','0','9',
IanBenzMaxim 0:33d4e66780c0 26 '1','0','1','1','1','2','1','3','1','4','1','5','1','6','1','7','1','8','1','9',
IanBenzMaxim 0:33d4e66780c0 27 '2','0','2','1','2','2','2','3','2','4','2','5','2','6','2','7','2','8','2','9',
IanBenzMaxim 0:33d4e66780c0 28 '3','0','3','1','3','2','3','3','3','4','3','5','3','6','3','7','3','8','3','9',
IanBenzMaxim 0:33d4e66780c0 29 '4','0','4','1','4','2','4','3','4','4','4','5','4','6','4','7','4','8','4','9',
IanBenzMaxim 0:33d4e66780c0 30 '5','0','5','1','5','2','5','3','5','4','5','5','5','6','5','7','5','8','5','9',
IanBenzMaxim 0:33d4e66780c0 31 '6','0','6','1','6','2','6','3','6','4','6','5','6','6','6','7','6','8','6','9',
IanBenzMaxim 0:33d4e66780c0 32 '7','0','7','1','7','2','7','3','7','4','7','5','7','6','7','7','7','8','7','9',
IanBenzMaxim 0:33d4e66780c0 33 '8','0','8','1','8','2','8','3','8','4','8','5','8','6','8','7','8','8','8','9',
IanBenzMaxim 0:33d4e66780c0 34 '9','0','9','1','9','2','9','3','9','4','9','5','9','6','9','7','9','8','9','9'
IanBenzMaxim 0:33d4e66780c0 35 };
IanBenzMaxim 0:33d4e66780c0 36 return cDigitsLut;
IanBenzMaxim 0:33d4e66780c0 37 }
IanBenzMaxim 0:33d4e66780c0 38
IanBenzMaxim 0:33d4e66780c0 39 inline char* u32toa(uint32_t value, char* buffer) {
IanBenzMaxim 0:33d4e66780c0 40 const char* cDigitsLut = GetDigitsLut();
IanBenzMaxim 0:33d4e66780c0 41
IanBenzMaxim 0:33d4e66780c0 42 if (value < 10000) {
IanBenzMaxim 0:33d4e66780c0 43 const uint32_t d1 = (value / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 44 const uint32_t d2 = (value % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 45
IanBenzMaxim 0:33d4e66780c0 46 if (value >= 1000)
IanBenzMaxim 0:33d4e66780c0 47 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 48 if (value >= 100)
IanBenzMaxim 0:33d4e66780c0 49 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 50 if (value >= 10)
IanBenzMaxim 0:33d4e66780c0 51 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 52 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 53 }
IanBenzMaxim 0:33d4e66780c0 54 else if (value < 100000000) {
IanBenzMaxim 0:33d4e66780c0 55 // value = bbbbcccc
IanBenzMaxim 0:33d4e66780c0 56 const uint32_t b = value / 10000;
IanBenzMaxim 0:33d4e66780c0 57 const uint32_t c = value % 10000;
IanBenzMaxim 0:33d4e66780c0 58
IanBenzMaxim 0:33d4e66780c0 59 const uint32_t d1 = (b / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 60 const uint32_t d2 = (b % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 61
IanBenzMaxim 0:33d4e66780c0 62 const uint32_t d3 = (c / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 63 const uint32_t d4 = (c % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 64
IanBenzMaxim 0:33d4e66780c0 65 if (value >= 10000000)
IanBenzMaxim 0:33d4e66780c0 66 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 67 if (value >= 1000000)
IanBenzMaxim 0:33d4e66780c0 68 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 69 if (value >= 100000)
IanBenzMaxim 0:33d4e66780c0 70 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 71 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 72
IanBenzMaxim 0:33d4e66780c0 73 *buffer++ = cDigitsLut[d3];
IanBenzMaxim 0:33d4e66780c0 74 *buffer++ = cDigitsLut[d3 + 1];
IanBenzMaxim 0:33d4e66780c0 75 *buffer++ = cDigitsLut[d4];
IanBenzMaxim 0:33d4e66780c0 76 *buffer++ = cDigitsLut[d4 + 1];
IanBenzMaxim 0:33d4e66780c0 77 }
IanBenzMaxim 0:33d4e66780c0 78 else {
IanBenzMaxim 0:33d4e66780c0 79 // value = aabbbbcccc in decimal
IanBenzMaxim 0:33d4e66780c0 80
IanBenzMaxim 0:33d4e66780c0 81 const uint32_t a = value / 100000000; // 1 to 42
IanBenzMaxim 0:33d4e66780c0 82 value %= 100000000;
IanBenzMaxim 0:33d4e66780c0 83
IanBenzMaxim 0:33d4e66780c0 84 if (a >= 10) {
IanBenzMaxim 0:33d4e66780c0 85 const unsigned i = a << 1;
IanBenzMaxim 0:33d4e66780c0 86 *buffer++ = cDigitsLut[i];
IanBenzMaxim 0:33d4e66780c0 87 *buffer++ = cDigitsLut[i + 1];
IanBenzMaxim 0:33d4e66780c0 88 }
IanBenzMaxim 0:33d4e66780c0 89 else
IanBenzMaxim 0:33d4e66780c0 90 *buffer++ = static_cast<char>('0' + static_cast<char>(a));
IanBenzMaxim 0:33d4e66780c0 91
IanBenzMaxim 0:33d4e66780c0 92 const uint32_t b = value / 10000; // 0 to 9999
IanBenzMaxim 0:33d4e66780c0 93 const uint32_t c = value % 10000; // 0 to 9999
IanBenzMaxim 0:33d4e66780c0 94
IanBenzMaxim 0:33d4e66780c0 95 const uint32_t d1 = (b / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 96 const uint32_t d2 = (b % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 97
IanBenzMaxim 0:33d4e66780c0 98 const uint32_t d3 = (c / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 99 const uint32_t d4 = (c % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 100
IanBenzMaxim 0:33d4e66780c0 101 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 102 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 103 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 104 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 105 *buffer++ = cDigitsLut[d3];
IanBenzMaxim 0:33d4e66780c0 106 *buffer++ = cDigitsLut[d3 + 1];
IanBenzMaxim 0:33d4e66780c0 107 *buffer++ = cDigitsLut[d4];
IanBenzMaxim 0:33d4e66780c0 108 *buffer++ = cDigitsLut[d4 + 1];
IanBenzMaxim 0:33d4e66780c0 109 }
IanBenzMaxim 0:33d4e66780c0 110 return buffer;
IanBenzMaxim 0:33d4e66780c0 111 }
IanBenzMaxim 0:33d4e66780c0 112
IanBenzMaxim 0:33d4e66780c0 113 inline char* i32toa(int32_t value, char* buffer) {
IanBenzMaxim 0:33d4e66780c0 114 uint32_t u = static_cast<uint32_t>(value);
IanBenzMaxim 0:33d4e66780c0 115 if (value < 0) {
IanBenzMaxim 0:33d4e66780c0 116 *buffer++ = '-';
IanBenzMaxim 0:33d4e66780c0 117 u = ~u + 1;
IanBenzMaxim 0:33d4e66780c0 118 }
IanBenzMaxim 0:33d4e66780c0 119
IanBenzMaxim 0:33d4e66780c0 120 return u32toa(u, buffer);
IanBenzMaxim 0:33d4e66780c0 121 }
IanBenzMaxim 0:33d4e66780c0 122
IanBenzMaxim 0:33d4e66780c0 123 inline char* u64toa(uint64_t value, char* buffer) {
IanBenzMaxim 0:33d4e66780c0 124 const char* cDigitsLut = GetDigitsLut();
IanBenzMaxim 0:33d4e66780c0 125 const uint64_t kTen8 = 100000000;
IanBenzMaxim 0:33d4e66780c0 126 const uint64_t kTen9 = kTen8 * 10;
IanBenzMaxim 0:33d4e66780c0 127 const uint64_t kTen10 = kTen8 * 100;
IanBenzMaxim 0:33d4e66780c0 128 const uint64_t kTen11 = kTen8 * 1000;
IanBenzMaxim 0:33d4e66780c0 129 const uint64_t kTen12 = kTen8 * 10000;
IanBenzMaxim 0:33d4e66780c0 130 const uint64_t kTen13 = kTen8 * 100000;
IanBenzMaxim 0:33d4e66780c0 131 const uint64_t kTen14 = kTen8 * 1000000;
IanBenzMaxim 0:33d4e66780c0 132 const uint64_t kTen15 = kTen8 * 10000000;
IanBenzMaxim 0:33d4e66780c0 133 const uint64_t kTen16 = kTen8 * kTen8;
IanBenzMaxim 0:33d4e66780c0 134
IanBenzMaxim 0:33d4e66780c0 135 if (value < kTen8) {
IanBenzMaxim 0:33d4e66780c0 136 uint32_t v = static_cast<uint32_t>(value);
IanBenzMaxim 0:33d4e66780c0 137 if (v < 10000) {
IanBenzMaxim 0:33d4e66780c0 138 const uint32_t d1 = (v / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 139 const uint32_t d2 = (v % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 140
IanBenzMaxim 0:33d4e66780c0 141 if (v >= 1000)
IanBenzMaxim 0:33d4e66780c0 142 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 143 if (v >= 100)
IanBenzMaxim 0:33d4e66780c0 144 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 145 if (v >= 10)
IanBenzMaxim 0:33d4e66780c0 146 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 147 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 148 }
IanBenzMaxim 0:33d4e66780c0 149 else {
IanBenzMaxim 0:33d4e66780c0 150 // value = bbbbcccc
IanBenzMaxim 0:33d4e66780c0 151 const uint32_t b = v / 10000;
IanBenzMaxim 0:33d4e66780c0 152 const uint32_t c = v % 10000;
IanBenzMaxim 0:33d4e66780c0 153
IanBenzMaxim 0:33d4e66780c0 154 const uint32_t d1 = (b / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 155 const uint32_t d2 = (b % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 156
IanBenzMaxim 0:33d4e66780c0 157 const uint32_t d3 = (c / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 158 const uint32_t d4 = (c % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 159
IanBenzMaxim 0:33d4e66780c0 160 if (value >= 10000000)
IanBenzMaxim 0:33d4e66780c0 161 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 162 if (value >= 1000000)
IanBenzMaxim 0:33d4e66780c0 163 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 164 if (value >= 100000)
IanBenzMaxim 0:33d4e66780c0 165 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 166 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 167
IanBenzMaxim 0:33d4e66780c0 168 *buffer++ = cDigitsLut[d3];
IanBenzMaxim 0:33d4e66780c0 169 *buffer++ = cDigitsLut[d3 + 1];
IanBenzMaxim 0:33d4e66780c0 170 *buffer++ = cDigitsLut[d4];
IanBenzMaxim 0:33d4e66780c0 171 *buffer++ = cDigitsLut[d4 + 1];
IanBenzMaxim 0:33d4e66780c0 172 }
IanBenzMaxim 0:33d4e66780c0 173 }
IanBenzMaxim 0:33d4e66780c0 174 else if (value < kTen16) {
IanBenzMaxim 0:33d4e66780c0 175 const uint32_t v0 = static_cast<uint32_t>(value / kTen8);
IanBenzMaxim 0:33d4e66780c0 176 const uint32_t v1 = static_cast<uint32_t>(value % kTen8);
IanBenzMaxim 0:33d4e66780c0 177
IanBenzMaxim 0:33d4e66780c0 178 const uint32_t b0 = v0 / 10000;
IanBenzMaxim 0:33d4e66780c0 179 const uint32_t c0 = v0 % 10000;
IanBenzMaxim 0:33d4e66780c0 180
IanBenzMaxim 0:33d4e66780c0 181 const uint32_t d1 = (b0 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 182 const uint32_t d2 = (b0 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 183
IanBenzMaxim 0:33d4e66780c0 184 const uint32_t d3 = (c0 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 185 const uint32_t d4 = (c0 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 186
IanBenzMaxim 0:33d4e66780c0 187 const uint32_t b1 = v1 / 10000;
IanBenzMaxim 0:33d4e66780c0 188 const uint32_t c1 = v1 % 10000;
IanBenzMaxim 0:33d4e66780c0 189
IanBenzMaxim 0:33d4e66780c0 190 const uint32_t d5 = (b1 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 191 const uint32_t d6 = (b1 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 192
IanBenzMaxim 0:33d4e66780c0 193 const uint32_t d7 = (c1 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 194 const uint32_t d8 = (c1 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 195
IanBenzMaxim 0:33d4e66780c0 196 if (value >= kTen15)
IanBenzMaxim 0:33d4e66780c0 197 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 198 if (value >= kTen14)
IanBenzMaxim 0:33d4e66780c0 199 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 200 if (value >= kTen13)
IanBenzMaxim 0:33d4e66780c0 201 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 202 if (value >= kTen12)
IanBenzMaxim 0:33d4e66780c0 203 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 204 if (value >= kTen11)
IanBenzMaxim 0:33d4e66780c0 205 *buffer++ = cDigitsLut[d3];
IanBenzMaxim 0:33d4e66780c0 206 if (value >= kTen10)
IanBenzMaxim 0:33d4e66780c0 207 *buffer++ = cDigitsLut[d3 + 1];
IanBenzMaxim 0:33d4e66780c0 208 if (value >= kTen9)
IanBenzMaxim 0:33d4e66780c0 209 *buffer++ = cDigitsLut[d4];
IanBenzMaxim 0:33d4e66780c0 210 if (value >= kTen8)
IanBenzMaxim 0:33d4e66780c0 211 *buffer++ = cDigitsLut[d4 + 1];
IanBenzMaxim 0:33d4e66780c0 212
IanBenzMaxim 0:33d4e66780c0 213 *buffer++ = cDigitsLut[d5];
IanBenzMaxim 0:33d4e66780c0 214 *buffer++ = cDigitsLut[d5 + 1];
IanBenzMaxim 0:33d4e66780c0 215 *buffer++ = cDigitsLut[d6];
IanBenzMaxim 0:33d4e66780c0 216 *buffer++ = cDigitsLut[d6 + 1];
IanBenzMaxim 0:33d4e66780c0 217 *buffer++ = cDigitsLut[d7];
IanBenzMaxim 0:33d4e66780c0 218 *buffer++ = cDigitsLut[d7 + 1];
IanBenzMaxim 0:33d4e66780c0 219 *buffer++ = cDigitsLut[d8];
IanBenzMaxim 0:33d4e66780c0 220 *buffer++ = cDigitsLut[d8 + 1];
IanBenzMaxim 0:33d4e66780c0 221 }
IanBenzMaxim 0:33d4e66780c0 222 else {
IanBenzMaxim 0:33d4e66780c0 223 const uint32_t a = static_cast<uint32_t>(value / kTen16); // 1 to 1844
IanBenzMaxim 0:33d4e66780c0 224 value %= kTen16;
IanBenzMaxim 0:33d4e66780c0 225
IanBenzMaxim 0:33d4e66780c0 226 if (a < 10)
IanBenzMaxim 0:33d4e66780c0 227 *buffer++ = static_cast<char>('0' + static_cast<char>(a));
IanBenzMaxim 0:33d4e66780c0 228 else if (a < 100) {
IanBenzMaxim 0:33d4e66780c0 229 const uint32_t i = a << 1;
IanBenzMaxim 0:33d4e66780c0 230 *buffer++ = cDigitsLut[i];
IanBenzMaxim 0:33d4e66780c0 231 *buffer++ = cDigitsLut[i + 1];
IanBenzMaxim 0:33d4e66780c0 232 }
IanBenzMaxim 0:33d4e66780c0 233 else if (a < 1000) {
IanBenzMaxim 0:33d4e66780c0 234 *buffer++ = static_cast<char>('0' + static_cast<char>(a / 100));
IanBenzMaxim 0:33d4e66780c0 235
IanBenzMaxim 0:33d4e66780c0 236 const uint32_t i = (a % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 237 *buffer++ = cDigitsLut[i];
IanBenzMaxim 0:33d4e66780c0 238 *buffer++ = cDigitsLut[i + 1];
IanBenzMaxim 0:33d4e66780c0 239 }
IanBenzMaxim 0:33d4e66780c0 240 else {
IanBenzMaxim 0:33d4e66780c0 241 const uint32_t i = (a / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 242 const uint32_t j = (a % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 243 *buffer++ = cDigitsLut[i];
IanBenzMaxim 0:33d4e66780c0 244 *buffer++ = cDigitsLut[i + 1];
IanBenzMaxim 0:33d4e66780c0 245 *buffer++ = cDigitsLut[j];
IanBenzMaxim 0:33d4e66780c0 246 *buffer++ = cDigitsLut[j + 1];
IanBenzMaxim 0:33d4e66780c0 247 }
IanBenzMaxim 0:33d4e66780c0 248
IanBenzMaxim 0:33d4e66780c0 249 const uint32_t v0 = static_cast<uint32_t>(value / kTen8);
IanBenzMaxim 0:33d4e66780c0 250 const uint32_t v1 = static_cast<uint32_t>(value % kTen8);
IanBenzMaxim 0:33d4e66780c0 251
IanBenzMaxim 0:33d4e66780c0 252 const uint32_t b0 = v0 / 10000;
IanBenzMaxim 0:33d4e66780c0 253 const uint32_t c0 = v0 % 10000;
IanBenzMaxim 0:33d4e66780c0 254
IanBenzMaxim 0:33d4e66780c0 255 const uint32_t d1 = (b0 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 256 const uint32_t d2 = (b0 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 257
IanBenzMaxim 0:33d4e66780c0 258 const uint32_t d3 = (c0 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 259 const uint32_t d4 = (c0 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 260
IanBenzMaxim 0:33d4e66780c0 261 const uint32_t b1 = v1 / 10000;
IanBenzMaxim 0:33d4e66780c0 262 const uint32_t c1 = v1 % 10000;
IanBenzMaxim 0:33d4e66780c0 263
IanBenzMaxim 0:33d4e66780c0 264 const uint32_t d5 = (b1 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 265 const uint32_t d6 = (b1 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 266
IanBenzMaxim 0:33d4e66780c0 267 const uint32_t d7 = (c1 / 100) << 1;
IanBenzMaxim 0:33d4e66780c0 268 const uint32_t d8 = (c1 % 100) << 1;
IanBenzMaxim 0:33d4e66780c0 269
IanBenzMaxim 0:33d4e66780c0 270 *buffer++ = cDigitsLut[d1];
IanBenzMaxim 0:33d4e66780c0 271 *buffer++ = cDigitsLut[d1 + 1];
IanBenzMaxim 0:33d4e66780c0 272 *buffer++ = cDigitsLut[d2];
IanBenzMaxim 0:33d4e66780c0 273 *buffer++ = cDigitsLut[d2 + 1];
IanBenzMaxim 0:33d4e66780c0 274 *buffer++ = cDigitsLut[d3];
IanBenzMaxim 0:33d4e66780c0 275 *buffer++ = cDigitsLut[d3 + 1];
IanBenzMaxim 0:33d4e66780c0 276 *buffer++ = cDigitsLut[d4];
IanBenzMaxim 0:33d4e66780c0 277 *buffer++ = cDigitsLut[d4 + 1];
IanBenzMaxim 0:33d4e66780c0 278 *buffer++ = cDigitsLut[d5];
IanBenzMaxim 0:33d4e66780c0 279 *buffer++ = cDigitsLut[d5 + 1];
IanBenzMaxim 0:33d4e66780c0 280 *buffer++ = cDigitsLut[d6];
IanBenzMaxim 0:33d4e66780c0 281 *buffer++ = cDigitsLut[d6 + 1];
IanBenzMaxim 0:33d4e66780c0 282 *buffer++ = cDigitsLut[d7];
IanBenzMaxim 0:33d4e66780c0 283 *buffer++ = cDigitsLut[d7 + 1];
IanBenzMaxim 0:33d4e66780c0 284 *buffer++ = cDigitsLut[d8];
IanBenzMaxim 0:33d4e66780c0 285 *buffer++ = cDigitsLut[d8 + 1];
IanBenzMaxim 0:33d4e66780c0 286 }
IanBenzMaxim 0:33d4e66780c0 287
IanBenzMaxim 0:33d4e66780c0 288 return buffer;
IanBenzMaxim 0:33d4e66780c0 289 }
IanBenzMaxim 0:33d4e66780c0 290
IanBenzMaxim 0:33d4e66780c0 291 inline char* i64toa(int64_t value, char* buffer) {
IanBenzMaxim 0:33d4e66780c0 292 uint64_t u = static_cast<uint64_t>(value);
IanBenzMaxim 0:33d4e66780c0 293 if (value < 0) {
IanBenzMaxim 0:33d4e66780c0 294 *buffer++ = '-';
IanBenzMaxim 0:33d4e66780c0 295 u = ~u + 1;
IanBenzMaxim 0:33d4e66780c0 296 }
IanBenzMaxim 0:33d4e66780c0 297
IanBenzMaxim 0:33d4e66780c0 298 return u64toa(u, buffer);
IanBenzMaxim 0:33d4e66780c0 299 }
IanBenzMaxim 0:33d4e66780c0 300
IanBenzMaxim 0:33d4e66780c0 301 } // namespace internal
IanBenzMaxim 0:33d4e66780c0 302 RAPIDJSON_NAMESPACE_END
IanBenzMaxim 0:33d4e66780c0 303
IanBenzMaxim 0:33d4e66780c0 304 #endif // RAPIDJSON_ITOA_