1 /* Teensyduino Core Library
2 * http://www.pjrc.com/teensy/
3 * Copyright (c) 2013 PJRC.COM, LLC.
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
13 * 1. The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
16 * 2. If the Software is incorporated into a build system that allows
17 * selection among a list of target devices, then similar target
18 * devices manufactured by PJRC.COM must be included in the list of
19 * target devices and selectable in the same manner.
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
23 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
25 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
26 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
27 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 #include "avr_functions.h"
35 size_t strlen(const char *s)
44 char * ultoa(unsigned long val, char *buf, int radix)
52 buf[i] = ((digit < 10) ? '0' + digit : 'A' + digit - 10);
58 for (j=0; j < i; j++, i--) {
66 char * ltoa(long val, char *buf, int radix)
69 return ultoa(val, buf, radix);
72 ultoa(-val, buf + 1, radix);
77 // TODO: actually write an efficient dtostrf()....
78 char * dtostrf(float val, int width, unsigned int precision, char *buf)
81 sprintf(format, "%%%d.%df", width, precision);
82 sprintf(buf, format, val);