Generic SmartRest library
Dependents: SmartRestUnitTest MbedSmartRest MbedSmartRestStreaming
FloatValue.cpp
- Committer:
- vwochnik
- Date:
- 2014-03-24
- Revision:
- 0:744801d5734d
- Child:
- 1:3e7b4c9e0821
File content as of revision 0:744801d5734d:
/* * FloatValue.cpp * * Created on: Nov 1, 2013 * * Authors: Vincent Wochnik <v.wochnik@gmail.com> * * Copyright (c) 2013 Cumulocity GmbH * * 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 "FloatValue.h" #include <math.h> FloatValue::FloatValue(double number, uint8_t digits, bool zflag) { _negative = (number < 0.0); _zflag = zflag; if (_negative) _number = -number; else _number = number; _digits = digits; } uint8_t FloatValue::valueType() const { return VALUE_FLOAT; } long FloatValue::integerValue() const { return 0L; } double FloatValue::floatValue() const { return (_negative) ? -_number : _number; } const char * FloatValue::characterValue() const { return 0; } size_t FloatValue::write(AbstractDataSink& sink) const { size_t n = 0; if (isnan(_number)) return sink.write("nan"); if (isinf(_number)) return sink.write("inf"); if (_number > 4294967040.0) return sink.write("ovf"); if (_negative) sink.write('-'); double number = _number, rounding = 0.5; for (uint8_t i = 0; i < _digits; ++i) rounding /= 10.0; number += rounding; unsigned long int_part = (unsigned long)number; double remainder = number - (double)int_part; if ((_zflag) || (int_part)) n += sink.write(int_part); if (_digits == 0) return n; n += sink.write("."); uint8_t digits = _digits; while (digits-- > 0) { remainder *= 10.0; unsigned long l = (unsigned long)remainder; n += sink.write(l); remainder -= l; } return n; } size_t FloatValue::length() const { if ((isnan(_number)) || (isinf(_number)) || (_number > 4294967040.0)) return 3; size_t l = 0; if (_negative) l++; double number = _number, rounding = 0.5; for (uint8_t i = 0; i < _digits; ++i) rounding /= 10.0; number += rounding; unsigned long n = (unsigned long)number; if ((_zflag) || (n)) { do { n /= 10; l++; } while(n); } if (_digits > 0) l += 1 + _digits; return l; } Value* FloatValue::copy() const { double number; number = (_negative) ? -_number : _number; return new FloatValue(number, _digits, _zflag); }