1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
#include "double-conversion.h"
#include "hs-double-conversion.h"
#include <stdio.h>
using namespace double_conversion;
static const int kToShortestLength = 26;
extern "C"
int _hs_ToShortestLength(void)
{
return kToShortestLength;
}
static const int kToFixedLength =
1 + DoubleToStringConverter::kMaxFixedDigitsBeforePoint +
1 + DoubleToStringConverter::kMaxFixedDigitsAfterPoint;
extern "C"
int _hs_ToFixedLength(void)
{
return kToFixedLength;
}
static const int kToExponentialLength =
DoubleToStringConverter::kMaxExponentialDigits + 8;
extern "C"
int _hs_ToExponentialLength(void)
{
return kToExponentialLength;
}
static const int kToPrecisionLength =
DoubleToStringConverter::kMaxPrecisionDigits + 7;
extern "C"
int _hs_ToPrecisionLength(void)
{
return kToPrecisionLength;
}
static int copy(uint16_t *buf, const StringBuilder& builder, const char *cbuf)
{
const int pos = builder.position();
for (int i = 0; i < pos; i++)
buf[i] = cbuf[i];
return pos;
}
static int copy(uint16_t *buf, const char *cbuf, const int len)
{
for (int i = 0; i < len; i++)
buf[i] = cbuf[i];
return len;
}
static inline const DoubleToStringConverter& defaultConverter(void)
{
const int flags = DoubleToStringConverter::UNIQUE_ZERO;
static DoubleToStringConverter converter(flags,
"Infinity",
"NaN",
'e',
-6, 21,
6, 0);
return converter;
}
static inline const DoubleToStringConverter& floatConverter(void)
{
const int flags = DoubleToStringConverter::UNIQUE_ZERO;
static DoubleToStringConverter converter(flags,
"Infinity",
"NaN",
'e',
-6, 6,
6, 0);
return converter;
}
extern "C"
int _hs_ToShortest(double value, char *buf)
{
StringBuilder builder(buf, kToShortestLength);
return defaultConverter().ToShortest(value, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_ToShortestFloat(float value, char *buf)
{
StringBuilder builder(buf, kToShortestLength);
return floatConverter().ToShortestSingle(value, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_Text_ToShortest(double value, uint16_t *buf)
{
char cbuf[kToShortestLength];
return copy(buf, cbuf, _hs_ToShortest(value, cbuf));
}
extern "C"
int _hs_Text_ToShortestFloat(float value, uint16_t *buf)
{
char cbuf[kToShortestLength];
return copy(buf, cbuf, _hs_ToShortestFloat(value, cbuf));
}
extern "C"
int _hs_ToFixed(double value, char *buf, const int ndigits)
{
StringBuilder builder(buf, kToFixedLength);
return defaultConverter().ToFixed(value, ndigits, &builder)
? builder.position() : -1;
}
int _hs_ToFixedFloat(float value, char *buf, const int ndigits)
{
StringBuilder builder(buf, kToFixedLength);
return floatConverter().ToFixed(value, ndigits, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_Text_ToFixed(double value, uint16_t *buf, const int ndigits)
{
char cbuf[kToFixedLength];
return copy(buf, cbuf, _hs_ToFixed(value, cbuf, ndigits));
}
extern "C"
int _hs_Text_ToFixedFloat(float value, uint16_t *buf, const int ndigits)
{
char cbuf[kToFixedLength];
return copy(buf, cbuf, _hs_ToFixedFloat(value, cbuf, ndigits));
}
extern "C"
int _hs_ToExponential(double value, char *buf, const int ndigits)
{
StringBuilder builder(buf, kToExponentialLength);
return defaultConverter().ToExponential(value, ndigits, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_ToExponentialFloat(float value, char *buf, const int ndigits)
{
StringBuilder builder(buf, kToExponentialLength);
return floatConverter().ToExponential(value, ndigits, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_Text_ToExponential(double value, uint16_t *buf, const int ndigits)
{
char cbuf[kToExponentialLength];
return copy(buf, cbuf, _hs_ToExponential(value, cbuf, ndigits));
}
extern "C"
int _hs_Text_ToExponentialFloat(float value, uint16_t *buf, const int ndigits)
{
char cbuf[kToExponentialLength];
return copy(buf, cbuf, _hs_ToExponentialFloat(value, cbuf, ndigits));
}
extern "C"
int _hs_ToPrecision(double value, char *buf, const int precision)
{
StringBuilder builder(buf, kToPrecisionLength);
return defaultConverter().ToPrecision(value, precision, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_ToPrecisionFloat(float value, char *buf, const int precision)
{
StringBuilder builder(buf, kToPrecisionLength);
return floatConverter().ToPrecision(value, precision, &builder)
? builder.position() : -1;
}
extern "C"
int _hs_Text_ToPrecision(double value, uint16_t *buf, const int precision)
{
char cbuf[kToPrecisionLength];
return copy(buf, cbuf, _hs_ToPrecision(value, cbuf, precision));
}
extern "C"
int _hs_Text_ToPrecisionFloat(float value, uint16_t *buf, const int precision)
{
char cbuf[kToPrecisionLength];
return copy(buf, cbuf, _hs_ToPrecisionFloat(value, cbuf, precision));
}
|
