10700044544

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Build # 10700044544

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95.45

/src/ArduinoJson/Numbers/FloatTraits.hpp

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2024, Benoit BLANCHON
// MIT License

#pragma once

#include <stddef.h>  // for size_t
#include <stdint.h>

#include <ArduinoJson/Configuration.hpp>
#include <ArduinoJson/Polyfills/alias_cast.hpp>
#include <ArduinoJson/Polyfills/math.hpp>
#include <ArduinoJson/Polyfills/pgmspace_generic.hpp>
#include <ArduinoJson/Polyfills/preprocessor.hpp>
#include <ArduinoJson/Polyfills/type_traits.hpp>

ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE

template <typename T, size_t = sizeof(T)>
struct FloatTraits {};

template <typename T>
struct FloatTraits<T, 8 /*64bits*/> {
  typedef uint64_t mantissa_type;
  static const short mantissa_bits = 52;
  static const mantissa_type mantissa_max =
      (mantissa_type(1) << mantissa_bits) - 1;

  typedef int16_t exponent_type;
  static const exponent_type exponent_max = 308;

  static pgm_ptr<T> positiveBinaryPowersOfTen() {
    ARDUINOJSON_DEFINE_PROGMEM_ARRAY(  //
        uint64_t, factors,
        {
            0x4024000000000000,  // 1e1
            0x4059000000000000,  // 1e2
            0x40C3880000000000,  // 1e4
            0x4197D78400000000,  // 1e8
            0x4341C37937E08000,  // 1e16
            0x4693B8B5B5056E17,  // 1e32
            0x4D384F03E93FF9F5,  // 1e64
            0x5A827748F9301D32,  // 1e128
            0x75154FDD7F73BF3C,  // 1e256
        });
    return pgm_ptr<T>(reinterpret_cast<const T*>(factors));
  }

  static pgm_ptr<T> negativeBinaryPowersOfTen() {
    ARDUINOJSON_DEFINE_PROGMEM_ARRAY(  //
        uint64_t, factors,
        {
            0x3FB999999999999A,  // 1e-1
            0x3F847AE147AE147B,  // 1e-2
            0x3F1A36E2EB1C432D,  // 1e-4
            0x3E45798EE2308C3A,  // 1e-8
            0x3C9CD2B297D889BC,  // 1e-16
            0x3949F623D5A8A733,  // 1e-32
            0x32A50FFD44F4A73D,  // 1e-64
            0x255BBA08CF8C979D,  // 1e-128
            0x0AC8062864AC6F43   // 1e-256
        });
    return pgm_ptr<T>(reinterpret_cast<const T*>(factors));
  }

  static T nan() {
    return forge(0x7ff8000000000000);
  }

  static T inf() {
    return forge(0x7ff0000000000000);
  }

  static T highest() {
    return forge(0x7FEFFFFFFFFFFFFF);
  }

  template <typename TOut>  // int64_t
  static T highest_for(
      enable_if_t<is_integral<TOut>::value && is_signed<TOut>::value &&
                      sizeof(TOut) == 8,
                  signed>* = 0) {
    return forge(0x43DFFFFFFFFFFFFF);  //  9.2233720368547748e+18
  }

  template <typename TOut>  // uint64_t
  static T highest_for(
      enable_if_t<is_integral<TOut>::value && is_unsigned<TOut>::value &&
                      sizeof(TOut) == 8,
                  unsigned>* = 0) {
    return forge(0x43EFFFFFFFFFFFFF);  //  1.8446744073709549568e+19
  }

  static T lowest() {
    return forge(0xFFEFFFFFFFFFFFFF);
  }

  // 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(uint64_t bits) {
    return alias_cast<T>(bits);
  }
};

template <typename T>
struct FloatTraits<T, 4 /*32bits*/> {
  typedef uint32_t mantissa_type;
  static const short mantissa_bits = 23;
  static const mantissa_type mantissa_max =
      (mantissa_type(1) << mantissa_bits) - 1;

  typedef int8_t exponent_type;
  static const exponent_type exponent_max = 38;

  static pgm_ptr<T> positiveBinaryPowersOfTen() {
    ARDUINOJSON_DEFINE_PROGMEM_ARRAY(uint32_t, factors,
                                     {
                                         0x41200000,  // 1e1f
                                         0x42c80000,  // 1e2f
                                         0x461c4000,  // 1e4f
                                         0x4cbebc20,  // 1e8f
                                         0x5a0e1bca,  // 1e16f
                                         0x749dc5ae   // 1e32f
                                     });
    return pgm_ptr<T>(reinterpret_cast<const T*>(factors));
  }

  static pgm_ptr<T> negativeBinaryPowersOfTen() {
    ARDUINOJSON_DEFINE_PROGMEM_ARRAY(uint32_t, factors,
                                     {
                                         0x3dcccccd,  // 1e-1f
                                         0x3c23d70a,  // 1e-2f
                                         0x38d1b717,  // 1e-4f
                                         0x322bcc77,  // 1e-8f
                                         0x24e69595,  // 1e-16f
                                         0x0a4fb11f   // 1e-32f
                                     });
    return pgm_ptr<T>(reinterpret_cast<const T*>(factors));
  }

  static T forge(uint32_t bits) {
    return alias_cast<T>(bits);
  }

  static T nan() {
    return forge(0x7fc00000);
  }

  static T inf() {
    return forge(0x7f800000);
  }

  static T highest() {
    return forge(0x7f7fffff);
  }

  template <typename TOut>  // int32_t
  static T highest_for(
      enable_if_t<is_integral<TOut>::value && is_signed<TOut>::value &&
                      sizeof(TOut) == 4,
                  signed>* = 0) {
    return forge(0x4EFFFFFF);  // 2.14748352E9
  }

  template <typename TOut>  // uint32_t
  static T highest_for(
      enable_if_t<is_integral<TOut>::value && is_unsigned<TOut>::value &&
                      sizeof(TOut) == 4,
                  unsigned>* = 0) {
    return forge(0x4F7FFFFF);  // 4.29496704E9
  }

  template <typename TOut>  // int64_t
  static T highest_for(
      enable_if_t<is_integral<TOut>::value && is_signed<TOut>::value &&
                      sizeof(TOut) == 8,
                  signed>* = 0) {
    return forge(0x5EFFFFFF);  // 9.22337148709896192E18
  }

  template <typename TOut>  // uint64_t
  static T highest_for(
      enable_if_t<is_integral<TOut>::value && is_unsigned<TOut>::value &&
                      sizeof(TOut) == 8,
                  unsigned>* = 0) {
    return forge(0x5F7FFFFF);  // 1.844674297419792384E19
  }

  static T lowest() {
    return forge(0xFf7fffff);
  }
};

template <typename TFloat, typename TExponent>
inline TFloat make_float(TFloat m, TExponent e) {
  using traits = FloatTraits<TFloat>;

  auto powersOfTen = e > 0 ? traits::positiveBinaryPowersOfTen()
                           : traits::negativeBinaryPowersOfTen();
  if (e <= 0)
    e = TExponent(-e);

  for (uint8_t index = 0; e != 0; index++) {
    if (e & 1)
      m *= powersOfTen[index];
    e >>= 1;
  }
  return m;
}

ARDUINOJSON_END_PRIVATE_NAMESPACE

1	// ArduinoJson - https://arduinojson.org
2	// Copyright © 2014-2024, Benoit BLANCHON
3	// MIT License
4
5	#pragma once
6
7	#include <stddef.h> // for size_t
8	#include <stdint.h>
9
10	#include <ArduinoJson/Configuration.hpp>
11	#include <ArduinoJson/Polyfills/alias_cast.hpp>
12	#include <ArduinoJson/Polyfills/math.hpp>
13	#include <ArduinoJson/Polyfills/pgmspace_generic.hpp>
14	#include <ArduinoJson/Polyfills/preprocessor.hpp>
15	#include <ArduinoJson/Polyfills/type_traits.hpp>
16
17	ARDUINOJSON_BEGIN_PRIVATE_NAMESPACE
18
19	template <typename T, size_t = sizeof(T)>
20	struct FloatTraits {};
21
22	template <typename T>
23	struct FloatTraits<T, 8 /64bits/> {
24	typedef uint64_t mantissa_type;
25	static const short mantissa_bits = 52;
26	static const mantissa_type mantissa_max =
27	(mantissa_type(1) << mantissa_bits) - 1;
28
29	typedef int16_t exponent_type;
30	static const exponent_type exponent_max = 308;
31
32	static pgm_ptr<T> positiveBinaryPowersOfTen() {	118✔
33	ARDUINOJSON_DEFINE_PROGMEM_ARRAY( //	×
34	uint64_t, factors,
35	{
36	0x4024000000000000, // 1e1
37	0x4059000000000000, // 1e2
38	0x40C3880000000000, // 1e4
39	0x4197D78400000000, // 1e8
40	0x4341C37937E08000, // 1e16
41	0x4693B8B5B5056E17, // 1e32
42	0x4D384F03E93FF9F5, // 1e64
43	0x5A827748F9301D32, // 1e128
44	0x75154FDD7F73BF3C, // 1e256
45	});
46	return pgm_ptr<T>(reinterpret_cast<const T*>(factors));	118✔
47	}
48
49	static pgm_ptr<T> negativeBinaryPowersOfTen() {	116✔
50	ARDUINOJSON_DEFINE_PROGMEM_ARRAY( //	×
51	uint64_t, factors,
52	{
53	0x3FB999999999999A, // 1e-1
54	0x3F847AE147AE147B, // 1e-2
55	0x3F1A36E2EB1C432D, // 1e-4
56	0x3E45798EE2308C3A, // 1e-8
57	0x3C9CD2B297D889BC, // 1e-16
58	0x3949F623D5A8A733, // 1e-32
59	0x32A50FFD44F4A73D, // 1e-64
60	0x255BBA08CF8C979D, // 1e-128
61	0x0AC8062864AC6F43 // 1e-256
62	});
63	return pgm_ptr<T>(reinterpret_cast<const T*>(factors));	116✔
64	}
65
66	static T nan() {	6✔
67	return forge(0x7ff8000000000000);	6✔
68	}
69
70	static T inf() {	15✔
71	return forge(0x7ff0000000000000);	15✔
72	}
73
74	static T highest() {
75	return forge(0x7FEFFFFFFFFFFFFF);
76	}
77
78	template <typename TOut> // int64_t
79	static T highest_for(	5✔
80	enable_if_t<is_integral<TOut>::value && is_signed<TOut>::value &&
81	sizeof(TOut) == 8,
82	signed>* = 0) {
83	return forge(0x43DFFFFFFFFFFFFF); // 9.2233720368547748e+18	5✔
84	}
85
86	template <typename TOut> // uint64_t
87	static T highest_for(	3✔
88	enable_if_t<is_integral<TOut>::value && is_unsigned<TOut>::value &&
89	sizeof(TOut) == 8,
90	unsigned>* = 0) {
91	return forge(0x43EFFFFFFFFFFFFF); // 1.8446744073709549568e+19	3✔
92	}
93
94	static T lowest() {
95	return forge(0xFFEFFFFFFFFFFFFF);
96	}
97
98	// constructs a double floating point values from its binary representation
99	// we use this function to workaround platforms with single precision literals
100	// (for example, when -fsingle-precision-constant is passed to GCC)
101	static T forge(uint64_t bits) {	29✔
102	return alias_cast<T>(bits);	29✔
103	}
104	};
105
106	template <typename T>
107	struct FloatTraits<T, 4 /32bits/> {
108	typedef uint32_t mantissa_type;
109	static const short mantissa_bits = 23;
110	static const mantissa_type mantissa_max =
111	(mantissa_type(1) << mantissa_bits) - 1;
112
113	typedef int8_t exponent_type;
114	static const exponent_type exponent_max = 38;
115
116	static pgm_ptr<T> positiveBinaryPowersOfTen() {	19✔
117	ARDUINOJSON_DEFINE_PROGMEM_ARRAY(uint32_t, factors,	1✔
118	{
119	0x41200000, // 1e1f
120	0x42c80000, // 1e2f
121	0x461c4000, // 1e4f
122	0x4cbebc20, // 1e8f
123	0x5a0e1bca, // 1e16f
124	0x749dc5ae // 1e32f
125	});
126	return pgm_ptr<T>(reinterpret_cast<const T*>(factors));	19✔
127	}
128
129	static pgm_ptr<T> negativeBinaryPowersOfTen() {	83✔
130	ARDUINOJSON_DEFINE_PROGMEM_ARRAY(uint32_t, factors,	1✔
131	{
132	0x3dcccccd, // 1e-1f
133	0x3c23d70a, // 1e-2f
134	0x38d1b717, // 1e-4f
135	0x322bcc77, // 1e-8f
136	0x24e69595, // 1e-16f
137	0x0a4fb11f // 1e-32f
138	});
139	return pgm_ptr<T>(reinterpret_cast<const T*>(factors));	83✔
140	}
141
142	static T forge(uint32_t bits) {	39✔
143	return alias_cast<T>(bits);	39✔
144	}
145
146	static T nan() {
147	return forge(0x7fc00000);
148	}
149
150	static T inf() {	2✔
151	return forge(0x7f800000);	2✔
152	}
153
154	static T highest() {
155	return forge(0x7f7fffff);
156	}
157
158	template <typename TOut> // int32_t
159	static T highest_for(	5✔
160	enable_if_t<is_integral<TOut>::value && is_signed<TOut>::value &&
161	sizeof(TOut) == 4,
162	signed>* = 0) {
163	return forge(0x4EFFFFFF); // 2.14748352E9	5✔
164	}
165
166	template <typename TOut> // uint32_t
167	static T highest_for(	4✔
168	enable_if_t<is_integral<TOut>::value && is_unsigned<TOut>::value &&
169	sizeof(TOut) == 4,
170	unsigned>* = 0) {
171	return forge(0x4F7FFFFF); // 4.29496704E9	4✔
172	}
173
174	template <typename TOut> // int64_t
175	static T highest_for(	25✔
176	enable_if_t<is_integral<TOut>::value && is_signed<TOut>::value &&
177	sizeof(TOut) == 8,
178	signed>* = 0) {
179	return forge(0x5EFFFFFF); // 9.22337148709896192E18	25✔
180	}
181
182	template <typename TOut> // uint64_t
183	static T highest_for(	3✔
184	enable_if_t<is_integral<TOut>::value && is_unsigned<TOut>::value &&
185	sizeof(TOut) == 8,
186	unsigned>* = 0) {
187	return forge(0x5F7FFFFF); // 1.844674297419792384E19	3✔
188	}
189
190	static T lowest() {
191	return forge(0xFf7fffff);
192	}
193	};
194
195	template <typename TFloat, typename TExponent>
196	inline TFloat make_float(TFloat m, TExponent e) {	133✔
197	using traits = FloatTraits<TFloat>;
198
199	auto powersOfTen = e > 0 ? traits::positiveBinaryPowersOfTen()	133✔
200	: traits::negativeBinaryPowersOfTen();	96✔
201	if (e <= 0)	133✔
202	e = TExponent(-e);	96✔
203
204	for (uint8_t index = 0; e != 0; index++) {	612✔
205	if (e & 1)	479✔
206	m *= powersOfTen[index];	221✔
207	e >>= 1;	479✔
208	}
209	return m;	133✔
210	}
211
212	ARDUINOJSON_END_PRIVATE_NAMESPACE

bblanchon / ArduinoJson / 10700044544

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