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Diffstat (limited to 'include/lib/ArduinoJson/TypeTraits/FloatTraits.hpp')
-rw-r--r-- | include/lib/ArduinoJson/TypeTraits/FloatTraits.hpp | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/include/lib/ArduinoJson/TypeTraits/FloatTraits.hpp b/include/lib/ArduinoJson/TypeTraits/FloatTraits.hpp deleted file mode 100644 index 648cc82..0000000 --- a/include/lib/ArduinoJson/TypeTraits/FloatTraits.hpp +++ /dev/null @@ -1,171 +0,0 @@ -// ArduinoJson - arduinojson.org -// Copyright Benoit Blanchon 2014-2018 -// MIT License - -#pragma once - -#include <stdint.h> -#include <stdlib.h> // for size_t -#include "../Configuration.hpp" -#include "../Polyfills/math.hpp" - -namespace ArduinoJson { -namespace Internals { - -template <typename T, size_t = sizeof(T)> -struct FloatTraits {}; - -template <typename T> -struct FloatTraits<T, 8 /*64bits*/> { - typedef int64_t mantissa_type; - static const short mantissa_bits = 52; - static const mantissa_type mantissa_max = - (static_cast<mantissa_type>(1) << mantissa_bits) - 1; - - typedef int16_t exponent_type; - static const exponent_type exponent_max = 308; - - template <typename TExponent> - static T make_float(T m, TExponent e) { - if (e > 0) { - for (uint8_t index = 0; e != 0; index++) { - if (e & 1) m *= positiveBinaryPowerOfTen(index); - e >>= 1; - } - } else { - e = TExponent(-e); - for (uint8_t index = 0; e != 0; index++) { - if (e & 1) m *= negativeBinaryPowerOfTen(index); - e >>= 1; - } - } - return m; - } - - static T positiveBinaryPowerOfTen(int index) { - static T factors[] = { - 1e1, - 1e2, - 1e4, - 1e8, - 1e16, - forge(0x4693B8B5, 0xB5056E17), // 1e32 - forge(0x4D384F03, 0xE93FF9F5), // 1e64 - forge(0x5A827748, 0xF9301D32), // 1e128 - forge(0x75154FDD, 0x7F73BF3C) // 1e256 - }; - return factors[index]; - } - - static T negativeBinaryPowerOfTen(int index) { - static T factors[] = { - forge(0x3FB99999, 0x9999999A), // 1e-1 - forge(0x3F847AE1, 0x47AE147B), // 1e-2 - forge(0x3F1A36E2, 0xEB1C432D), // 1e-4 - forge(0x3E45798E, 0xE2308C3A), // 1e-8 - forge(0x3C9CD2B2, 0x97D889BC), // 1e-16 - forge(0x3949F623, 0xD5A8A733), // 1e-32 - forge(0x32A50FFD, 0x44F4A73D), // 1e-64 - forge(0x255BBA08, 0xCF8C979D), // 1e-128 - forge(0x0AC80628, 0x64AC6F43) // 1e-256 - }; - return factors[index]; - } - - static T negativeBinaryPowerOfTenPlusOne(int index) { - static T factors[] = { - 1e0, - forge(0x3FB99999, 0x9999999A), // 1e-1 - forge(0x3F50624D, 0xD2F1A9FC), // 1e-3 - forge(0x3E7AD7F2, 0x9ABCAF48), // 1e-7 - forge(0x3CD203AF, 0x9EE75616), // 1e-15 - forge(0x398039D6, 0x65896880), // 1e-31 - forge(0x32DA53FC, 0x9631D10D), // 1e-63 - forge(0x25915445, 0x81B7DEC2), // 1e-127 - forge(0x0AFE07B2, 0x7DD78B14) // 1e-255 - }; - return factors[index]; - } - - static T nan() { - return forge(0x7ff80000, 0x00000000); - } - - static T inf() { - return forge(0x7ff00000, 0x00000000); - } - - // constructs a double floating point values from its binary representation - // we use this function to workaround platforms with single precision literals - // (for example, when -fsingle-precision-constant is passed to GCC) - static T forge(uint32_t msb, uint32_t lsb) { - union { - uint64_t integerBits; - T floatBits; - }; - integerBits = (uint64_t(msb) << 32) | lsb; - return floatBits; - } -}; - -template <typename T> -struct FloatTraits<T, 4 /*32bits*/> { - typedef int32_t mantissa_type; - static const short mantissa_bits = 23; - static const mantissa_type mantissa_max = - (static_cast<mantissa_type>(1) << mantissa_bits) - 1; - - typedef int8_t exponent_type; - static const exponent_type exponent_max = 38; - - template <typename TExponent> - static T make_float(T m, TExponent e) { - if (e > 0) { - for (uint8_t index = 0; e != 0; index++) { - if (e & 1) m *= positiveBinaryPowerOfTen(index); - e >>= 1; - } - } else { - e = -e; - for (uint8_t index = 0; e != 0; index++) { - if (e & 1) m *= negativeBinaryPowerOfTen(index); - e >>= 1; - } - } - return m; - } - - static T positiveBinaryPowerOfTen(int index) { - static T factors[] = {1e1f, 1e2f, 1e4f, 1e8f, 1e16f, 1e32f}; - return factors[index]; - } - - static T negativeBinaryPowerOfTen(int index) { - static T factors[] = {1e-1f, 1e-2f, 1e-4f, 1e-8f, 1e-16f, 1e-32f}; - return factors[index]; - } - - static T negativeBinaryPowerOfTenPlusOne(int index) { - static T factors[] = {1e0f, 1e-1f, 1e-3f, 1e-7f, 1e-15f, 1e-31f}; - return factors[index]; - } - - static T forge(uint32_t bits) { - union { - uint32_t integerBits; - T floatBits; - }; - integerBits = bits; - return floatBits; - } - - static T nan() { - return forge(0x7fc00000); - } - - static T inf() { - return forge(0x7f800000); - } -}; -} -} |