3780565998

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Committed by Benoit Blanchon

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Remove support for naked `char` (was deprecated since 6.18.0)

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98.55

/src/ArduinoJson/Numbers/FloatTraits.hpp

// ArduinoJson - https://arduinojson.org
// Copyright © 2014-2022, 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/preprocessor.hpp>
#include <ArduinoJson/Polyfills/static_array.hpp>
#include <ArduinoJson/Polyfills/type_traits.hpp>

namespace ARDUINOJSON_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;

  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) {
    ARDUINOJSON_DEFINE_STATIC_ARRAY(  //
        uint32_t, factors,
        ARDUINOJSON_EXPAND18({
            0x40240000, 0x00000000,  // 1e1
            0x40590000, 0x00000000,  // 1e2
            0x40C38800, 0x00000000,  // 1e4
            0x4197D784, 0x00000000,  // 1e8
            0x4341C379, 0x37E08000,  // 1e16
            0x4693B8B5, 0xB5056E17,  // 1e32
            0x4D384F03, 0xE93FF9F5,  // 1e64
            0x5A827748, 0xF9301D32,  // 1e128
            0x75154FDD, 0x7F73BF3C   // 1e256
        }));
    return forge(
        ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index),
        ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index + 1));
  }

  static T negativeBinaryPowerOfTen(int index) {
    ARDUINOJSON_DEFINE_STATIC_ARRAY(  //
        uint32_t, factors,
        ARDUINOJSON_EXPAND18({
            0x3FB99999, 0x9999999A,  // 1e-1
            0x3F847AE1, 0x47AE147B,  // 1e-2
            0x3F1A36E2, 0xEB1C432D,  // 1e-4
            0x3E45798E, 0xE2308C3A,  // 1e-8
            0x3C9CD2B2, 0x97D889BC,  // 1e-16
            0x3949F623, 0xD5A8A733,  // 1e-32
            0x32A50FFD, 0x44F4A73D,  // 1e-64
            0x255BBA08, 0xCF8C979D,  // 1e-128
            0x0AC80628, 0x64AC6F43   // 1e-256
        }));
    return forge(
        ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index),
        ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index + 1));
  }

  static T negativeBinaryPowerOfTenPlusOne(int index) {
    ARDUINOJSON_DEFINE_STATIC_ARRAY(  //
        uint32_t, factors,
        ARDUINOJSON_EXPAND18({
            0x3FF00000, 0x00000000,  // 1e0
            0x3FB99999, 0x9999999A,  // 1e-1
            0x3F50624D, 0xD2F1A9FC,  // 1e-3
            0x3E7AD7F2, 0x9ABCAF48,  // 1e-7
            0x3CD203AF, 0x9EE75616,  // 1e-15
            0x398039D6, 0x65896880,  // 1e-31
            0x32DA53FC, 0x9631D10D,  // 1e-63
            0x25915445, 0x81B7DEC2,  // 1e-127
            0x0AFE07B2, 0x7DD78B14   // 1e-255
        }));
    return forge(
        ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index),
        ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index + 1));
  }

  static T nan() {
    return forge(0x7ff80000, 0x00000000);
  }

  static T inf() {
    return forge(0x7ff00000, 0x00000000);
  }

  static T highest() {
    return forge(0x7FEFFFFF, 0xFFFFFFFF);
  }

  template <typename TOut>  // int64_t
  static T highest_for(
      typename enable_if<is_integral<TOut>::value && is_signed<TOut>::value &&
                             sizeof(TOut) == 8,
                         signed>::type* = 0) {
    return forge(0x43DFFFFF, 0xFFFFFFFF);  //  9.2233720368547748e+18
  }

  template <typename TOut>  // uint64_t
  static T highest_for(
      typename enable_if<is_integral<TOut>::value && is_unsigned<TOut>::value &&
                             sizeof(TOut) == 8,
                         unsigned>::type* = 0) {
    return forge(0x43EFFFFF, 0xFFFFFFFF);  //  1.8446744073709549568e+19
  }

  static T lowest() {
    return forge(0xFFEFFFFF, 0xFFFFFFFF);
  }

  // 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) {
    return alias_cast<T>((uint64_t(msb) << 32) | lsb);
  }
};

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;

  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) {
    ARDUINOJSON_DEFINE_STATIC_ARRAY(uint32_t, factors,
                                    ARDUINOJSON_EXPAND6({
                                        0x41200000,  // 1e1f
                                        0x42c80000,  // 1e2f
                                        0x461c4000,  // 1e4f
                                        0x4cbebc20,  // 1e8f
                                        0x5a0e1bca,  // 1e16f
                                        0x749dc5ae   // 1e32f
                                    }));
    return forge(ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, index));
  }

  static T negativeBinaryPowerOfTen(int index) {
    ARDUINOJSON_DEFINE_STATIC_ARRAY(uint32_t, factors,
                                    ARDUINOJSON_EXPAND6({
                                        0x3dcccccd,  // 1e-1f
                                        0x3c23d70a,  // 1e-2f
                                        0x38d1b717,  // 1e-4f
                                        0x322bcc77,  // 1e-8f
                                        0x24e69595,  // 1e-16f
                                        0x0a4fb11f   // 1e-32f
                                    }));
    return forge(ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, index));
  }

  static T negativeBinaryPowerOfTenPlusOne(int index) {
    ARDUINOJSON_DEFINE_STATIC_ARRAY(uint32_t, factors,
                                    ARDUINOJSON_EXPAND6({
                                        0x3f800000,  // 1e0f
                                        0x3dcccccd,  // 1e-1f
                                        0x3a83126f,  // 1e-3f
                                        0x33d6bf95,  // 1e-7f
                                        0x26901d7d,  // 1e-15f
                                        0x0c01ceb3   // 1e-31f
                                    }));
    return forge(ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, index));
  }

  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(
      typename enable_if<is_integral<TOut>::value && is_signed<TOut>::value &&
                             sizeof(TOut) == 4,
                         signed>::type* = 0) {
    return forge(0x4EFFFFFF);  // 2.14748352E9
  }

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

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

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

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

1	// ArduinoJson - https://arduinojson.org
2	// Copyright © 2014-2022, 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/preprocessor.hpp>
14	#include <ArduinoJson/Polyfills/static_array.hpp>
15	#include <ArduinoJson/Polyfills/type_traits.hpp>
16
17	namespace ARDUINOJSON_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	template <typename TExponent>
33	static T make_float(T m, TExponent e) {
34	if (e > 0) {
35	for (uint8_t index = 0; e != 0; index++) {
36	if (e & 1)
37	m *= positiveBinaryPowerOfTen(index);
38	e >>= 1;
39	}
40	} else {
41	e = TExponent(-e);
42	for (uint8_t index = 0; e != 0; index++) {
43	if (e & 1)
44	m *= negativeBinaryPowerOfTen(index);
45	e >>= 1;
46	}
47	}
48	return m;
49	}
50
51	static T positiveBinaryPowerOfTen(int index) {
52	ARDUINOJSON_DEFINE_STATIC_ARRAY( //
53	uint32_t, factors,
54	ARDUINOJSON_EXPAND18({
55	0x40240000, 0x00000000, // 1e1
56	0x40590000, 0x00000000, // 1e2
57	0x40C38800, 0x00000000, // 1e4
58	0x4197D784, 0x00000000, // 1e8
59	0x4341C379, 0x37E08000, // 1e16
60	0x4693B8B5, 0xB5056E17, // 1e32
61	0x4D384F03, 0xE93FF9F5, // 1e64
62	0x5A827748, 0xF9301D32, // 1e128
63	0x75154FDD, 0x7F73BF3C // 1e256
64	}));
65	return forge(
66	ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index),
67	ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index + 1));
68	}
69
70	static T negativeBinaryPowerOfTen(int index) {
71	ARDUINOJSON_DEFINE_STATIC_ARRAY( //
72	uint32_t, factors,
73	ARDUINOJSON_EXPAND18({
74	0x3FB99999, 0x9999999A, // 1e-1
75	0x3F847AE1, 0x47AE147B, // 1e-2
76	0x3F1A36E2, 0xEB1C432D, // 1e-4
77	0x3E45798E, 0xE2308C3A, // 1e-8
78	0x3C9CD2B2, 0x97D889BC, // 1e-16
79	0x3949F623, 0xD5A8A733, // 1e-32
80	0x32A50FFD, 0x44F4A73D, // 1e-64
81	0x255BBA08, 0xCF8C979D, // 1e-128
82	0x0AC80628, 0x64AC6F43 // 1e-256
83	}));
84	return forge(
85	ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index),
86	ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index + 1));
87	}
88
89	static T negativeBinaryPowerOfTenPlusOne(int index) {
90	ARDUINOJSON_DEFINE_STATIC_ARRAY( //
91	uint32_t, factors,
92	ARDUINOJSON_EXPAND18({
93	0x3FF00000, 0x00000000, // 1e0
94	0x3FB99999, 0x9999999A, // 1e-1
95	0x3F50624D, 0xD2F1A9FC, // 1e-3
96	0x3E7AD7F2, 0x9ABCAF48, // 1e-7
97	0x3CD203AF, 0x9EE75616, // 1e-15
98	0x398039D6, 0x65896880, // 1e-31
99	0x32DA53FC, 0x9631D10D, // 1e-63
100	0x25915445, 0x81B7DEC2, // 1e-127
101	0x0AFE07B2, 0x7DD78B14 // 1e-255
102	}));
103	return forge(
104	ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index),
105	ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, 2 * index + 1));
106	}
107
108	static T nan() {
109	return forge(0x7ff80000, 0x00000000);
110	}
111
112	static T inf() {
113	return forge(0x7ff00000, 0x00000000);
114	}
115
116	static T highest() {
117	return forge(0x7FEFFFFF, 0xFFFFFFFF);
118	}
119
120	template <typename TOut> // int64_t
121	static T highest_for(
122	typename enable_if<is_integral<TOut>::value && is_signed<TOut>::value &&
123	sizeof(TOut) == 8,
124	signed>::type* = 0) {
125	return forge(0x43DFFFFF, 0xFFFFFFFF); // 9.2233720368547748e+18
126	}
127
128	template <typename TOut> // uint64_t
129	static T highest_for(
130	typename enable_if<is_integral<TOut>::value && is_unsigned<TOut>::value &&
131	sizeof(TOut) == 8,
132	unsigned>::type* = 0) {
133	return forge(0x43EFFFFF, 0xFFFFFFFF); // 1.8446744073709549568e+19
134	}
135
136	static T lowest() {
137	return forge(0xFFEFFFFF, 0xFFFFFFFF);
138	}
139
140	// constructs a double floating point values from its binary representation
141	// we use this function to workaround platforms with single precision literals
142	// (for example, when -fsingle-precision-constant is passed to GCC)
143	static T forge(uint32_t msb, uint32_t lsb) {
144	return alias_cast<T>((uint64_t(msb) << 32) \| lsb);
145	}
146	};
147
148	template <typename T>
149	struct FloatTraits<T, 4 /32bits/> {
150	typedef uint32_t mantissa_type;
151	static const short mantissa_bits = 23;
152	static const mantissa_type mantissa_max =
153	(mantissa_type(1) << mantissa_bits) - 1;
154
155	typedef int8_t exponent_type;
156	static const exponent_type exponent_max = 38;
157
158	template <typename TExponent>
159	static T make_float(T m, TExponent e) {
160	if (e > 0) {
161	for (uint8_t index = 0; e != 0; index++) {
162	if (e & 1)
163	m *= positiveBinaryPowerOfTen(index);
164	e >>= 1;
165	}
166	} else {
167	e = -e;
168	for (uint8_t index = 0; e != 0; index++) {
169	if (e & 1)
170	m *= negativeBinaryPowerOfTen(index);
171	e >>= 1;
172	}
173	}
174	return m;
175	}
176
177	static T positiveBinaryPowerOfTen(int index) {
178	ARDUINOJSON_DEFINE_STATIC_ARRAY(uint32_t, factors,
179	ARDUINOJSON_EXPAND6({
180	0x41200000, // 1e1f
181	0x42c80000, // 1e2f
182	0x461c4000, // 1e4f
183	0x4cbebc20, // 1e8f
184	0x5a0e1bca, // 1e16f
185	0x749dc5ae // 1e32f
186	}));
187	return forge(ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, index));
188	}
189
190	static T negativeBinaryPowerOfTen(int index) {
191	ARDUINOJSON_DEFINE_STATIC_ARRAY(uint32_t, factors,
192	ARDUINOJSON_EXPAND6({
193	0x3dcccccd, // 1e-1f
194	0x3c23d70a, // 1e-2f
195	0x38d1b717, // 1e-4f
196	0x322bcc77, // 1e-8f
197	0x24e69595, // 1e-16f
198	0x0a4fb11f // 1e-32f
199	}));
200	return forge(ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, index));
201	}
202
203	static T negativeBinaryPowerOfTenPlusOne(int index) {
204	ARDUINOJSON_DEFINE_STATIC_ARRAY(uint32_t, factors,
205	ARDUINOJSON_EXPAND6({
206	0x3f800000, // 1e0f
207	0x3dcccccd, // 1e-1f
208	0x3a83126f, // 1e-3f
209	0x33d6bf95, // 1e-7f
210	0x26901d7d, // 1e-15f
211	0x0c01ceb3 // 1e-31f
212	}));
213	return forge(ARDUINOJSON_READ_STATIC_ARRAY(uint32_t, factors, index));
214	}
215
216	static T forge(uint32_t bits) {
217	return alias_cast<T>(bits);
218	}
219
220	static T nan() {
221	return forge(0x7fc00000);
222	}
223
224	static T inf() {
225	return forge(0x7f800000);
226	}
227
228	static T highest() {
229	return forge(0x7f7fffff);
230	}
231
232	template <typename TOut> // int32_t
233	static T highest_for(
234	typename enable_if<is_integral<TOut>::value && is_signed<TOut>::value &&
235	sizeof(TOut) == 4,
236	signed>::type* = 0) {
237	return forge(0x4EFFFFFF); // 2.14748352E9
238	}
239
240	template <typename TOut> // uint32_t
241	static T highest_for(
242	typename enable_if<is_integral<TOut>::value && is_unsigned<TOut>::value &&
243	sizeof(TOut) == 4,
244	unsigned>::type* = 0) {
245	return forge(0x4F7FFFFF); // 4.29496704E9
246	}
247
248	template <typename TOut> // int64_t
249	static T highest_for(
250	typename enable_if<is_integral<TOut>::value && is_signed<TOut>::value &&
251	sizeof(TOut) == 8,
252	signed>::type* = 0) {
253	return forge(0x5EFFFFFF); // 9.22337148709896192E18
254	}
255
256	template <typename TOut> // uint64_t
257	static T highest_for(
258	typename enable_if<is_integral<TOut>::value && is_unsigned<TOut>::value &&
259	sizeof(TOut) == 8,
260	unsigned>::type* = 0) {
261	return forge(0x5F7FFFFF); // 1.844674297419792384E19
262	}
263
264	static T lowest() {
265	return forge(0xFf7fffff);
266	}
267	};
268	} // namespace ARDUINOJSON_NAMESPACE

bblanchon / ArduinoJson / 3780565998

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