read_flash_string.cpp
1 /*
2  * uuid-common - Microcontroller common utilities
3  * Copyright 2019 Simon Arlott
4  *
5  * This program is free software: you can redistribute it and/or modify
6  * it under the terms of the GNU General Public License as published by
7  * the Free Software Foundation, either version 3 of the License, or
8  * (at your option) any later version.
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program. If not, see <http://www.gnu.org/licenses/>.
17  */
18 
19 #include <uuid/common.h>
20 
21 #include <Arduino.h>
22 
23 #include <string>
24 
25 namespace uuid {
26 
27 std::string read_flash_string(const __FlashStringHelper *flash_str) {
28  std::string str(::strlen_P(reinterpret_cast<PGM_P>(flash_str)), '\0');
29 
30  ::strncpy_P(&str[0], reinterpret_cast<PGM_P>(flash_str), str.capacity() + 1);
31 
32  return str;
33 }
34 
35 } // namespace uuid
Common utilities.
std::string read_flash_string(const __FlashStringHelper *flash_str)
Read a string from flash and convert it to a std::string.