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0.1.3 UUID

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rob tillaart 2022-06-16 09:37:59 +02:00
parent eb9557448e
commit 625779fd3d
6 changed files with 31 additions and 12 deletions
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9
libraries/UUID/README.md
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@ -99,6 +99,8 @@ Not tested ESP32 (and many other platforms) yet.
Performance measured with **UUID_test.ino** shows the following times:
#### microseconds per byte
| Version | Function | UNO 16 MHz | ESP32 240 MHz |
|:-------:|:------------|:----------:|:-------------:|
| 0.1.0 | seed | 4 us | |
@ -108,16 +110,19 @@ Performance measured with **UUID_test.ino** shows the following times:
| 0.1.1 | generate | 248 us | |
| 0.1.1 | toCharArray | 4 us | |
| 0.1.2 | generate | 156 us | |
| 0.1.3 | generate | 120 us | |
Note: generating the 16 random bytes already takes ~40 us.
UUID's per second
#### UUID's per second
| Version | UNO 16 MHz | ESP32 240 MHz | notes |
|:-------:|:------------:|:---------------:|:------:|
| 0.1.0 | 2000++ | |
| 0.1.1 | 4000++ | | generate both modes
| 0.1.2 | 6400++ | | generate both modes
| 0.1.3 | 8200++ | | generate both modes
Note that this maximum is not realistic e.g. for a server where also

12
libraries/UUID/UUID.cpp
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@ -1,7 +1,7 @@
//
// FILE: UUID.cpp
// AUTHOR: Rob Tillaart
// VERSION: 0.1.2
// VERSION: 0.1.3
// DATE: 2022-06-14
// PURPOSE: Arduino Library for generating UUID's
// URL: https://github.com/RobTillaart/UUID
@ -14,8 +14,9 @@
// fix bug in generator
// define UUID_MODE_VARIANT4
// define UUID_MODE_RANDOM
// 0.1.2 2022-06-16 fix version number
// 0.1.2 2022-06-15 fix version number
// improve performance generate()
// 0.1.3 2022-06-16 improve performance generate() again
#include "UUID.h"
@ -71,12 +72,13 @@ void UUID::generate()
// process one byte at the time instead of a nibble
uint8_t nr = i / 4;
uint8_t ch = _ar[nr] & 0xF;
uint8_t xx = _ar[nr];
uint8_t ch = xx & 0xF;
_buffer[j++] = (ch < 10) ? '0' + ch : ('a' - 10) + ch;
ch = (_ar[nr] >> 4) & 0xF;
_buffer[j++] = (ch < 10) ? '0' + ch : ('a' - 10) + ch;
ch = (xx >> 4) & 0xF;
_ar[nr] >>= 8;
_buffer[j++] = (ch < 10) ? '0' + ch : ('a' - 10) + ch;
}
_buffer[36] = 0;
}

4
libraries/UUID/UUID.h
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@ -2,7 +2,7 @@
//
// FILE: UUID.h
// AUTHOR: Rob Tillaart
// VERSION: 0.1.2
// VERSION: 0.1.3
// DATE: 2022-06-14
// PURPOSE: Arduino Library for generating UUID's
// URL: https://github.com/RobTillaart/UUID
@ -15,7 +15,7 @@
#include "Printable.h"
#define UUID_LIB_VERSION (F("0.1.2"))
#define UUID_LIB_VERSION (F("0.1.3"))
// TODO an enum?
#define UUID_MODE_VARIANT4 0

12
libraries/UUID/examples/UUID_test/output_0.1.3.txt Normal file
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@ -0,0 +1,12 @@
UUID_test.ino
UUID_LIB_VERSION: 0.1.3
seed: 8
generate: 120
toCharArray: 4
UUID: 0ac82d02-002b-4ccb-b96c-1c7839cbc4c0
UUID: d7652208-bd86-400d-93eb-eeafc12fe18d
UUID: cf48f771-f39b-4fdd-a324-acad1c7ac596
UUID: f74404e9-3cf4-4769-8c15-1a278e126987
UUID: 4fe109d9-09d6-41e0-885a-b4ee716d1f5d

2
libraries/UUID/library.json
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@ -15,7 +15,7 @@
"type": "git",
"url": "https://github.com/RobTillaart/UUID.git"
},
"version": "0.1.2",
"version": "0.1.3",
"license": "MIT",
"frameworks": "arduino",
"platforms": "*",

2
libraries/UUID/library.properties
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@ -1,5 +1,5 @@
name=UUID
version=0.1.2
version=0.1.3
author=Rob Tillaart <rob.tillaart@gmail.com>
maintainer=Rob Tillaart <rob.tillaart@gmail.com>
sentence=Arduino library for generating UUID's. (experimental).