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1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 #include "vm/double_conversion.h" | 5 #include "vm/double_conversion.h" |
6 | 6 |
7 #include "third_party/double-conversion/src/double-conversion.h" | 7 #include "third_party/double-conversion/src/double-conversion.h" |
8 | 8 |
9 #include "vm/exceptions.h" | 9 #include "vm/exceptions.h" |
10 #include "vm/globals.h" | 10 #include "vm/globals.h" |
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83 0, 0); // Last four values are ignored in fixed mode. | 83 0, 0); // Last four values are ignored in fixed mode. |
84 | 84 |
85 char* buffer = Thread::Current()->zone()->Alloc<char>(kBufferSize); | 85 char* buffer = Thread::Current()->zone()->Alloc<char>(kBufferSize); |
86 buffer[kBufferSize - 1] = '\0'; | 86 buffer[kBufferSize - 1] = '\0'; |
87 double_conversion::StringBuilder builder(buffer, kBufferSize); | 87 double_conversion::StringBuilder builder(buffer, kBufferSize); |
88 bool status = converter.ToFixed(d, fraction_digits, &builder); | 88 bool status = converter.ToFixed(d, fraction_digits, &builder); |
89 ASSERT(status); | 89 ASSERT(status); |
90 return String::New(builder.Finalize()); | 90 return String::New(builder.Finalize()); |
91 } | 91 } |
92 | 92 |
93 | |
94 RawString* DoubleToStringAsExponential(double d, int fraction_digits) { | 93 RawString* DoubleToStringAsExponential(double d, int fraction_digits) { |
95 static const int kMinFractionDigits = -1; // -1 represents shortest mode. | 94 static const int kMinFractionDigits = -1; // -1 represents shortest mode. |
96 static const int kMaxFractionDigits = 20; | 95 static const int kMaxFractionDigits = 20; |
97 static const int kConversionFlags = | 96 static const int kConversionFlags = |
98 double_conversion::DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN; | 97 double_conversion::DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN; |
99 const int kBufferSize = 128; | 98 const int kBufferSize = 128; |
100 | 99 |
101 USE(kMinFractionDigits); | 100 USE(kMinFractionDigits); |
102 USE(kMaxFractionDigits); | 101 USE(kMaxFractionDigits); |
103 // The output contains the sign, at most 1 digits, the decimal point followed | 102 // The output contains the sign, at most 1 digits, the decimal point followed |
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114 0, 0); // Last four values are ignored in exponential mode. | 113 0, 0); // Last four values are ignored in exponential mode. |
115 | 114 |
116 char* buffer = Thread::Current()->zone()->Alloc<char>(kBufferSize); | 115 char* buffer = Thread::Current()->zone()->Alloc<char>(kBufferSize); |
117 buffer[kBufferSize - 1] = '\0'; | 116 buffer[kBufferSize - 1] = '\0'; |
118 double_conversion::StringBuilder builder(buffer, kBufferSize); | 117 double_conversion::StringBuilder builder(buffer, kBufferSize); |
119 bool status = converter.ToExponential(d, fraction_digits, &builder); | 118 bool status = converter.ToExponential(d, fraction_digits, &builder); |
120 ASSERT(status); | 119 ASSERT(status); |
121 return String::New(builder.Finalize()); | 120 return String::New(builder.Finalize()); |
122 } | 121 } |
123 | 122 |
124 | |
125 RawString* DoubleToStringAsPrecision(double d, int precision) { | 123 RawString* DoubleToStringAsPrecision(double d, int precision) { |
126 static const int kMinPrecisionDigits = 1; | 124 static const int kMinPrecisionDigits = 1; |
127 static const int kMaxPrecisionDigits = 21; | 125 static const int kMaxPrecisionDigits = 21; |
128 static const int kMaxLeadingPaddingZeroes = 6; | 126 static const int kMaxLeadingPaddingZeroes = 6; |
129 static const int kMaxTrailingPaddingZeroes = 0; | 127 static const int kMaxTrailingPaddingZeroes = 0; |
130 static const int kConversionFlags = | 128 static const int kConversionFlags = |
131 double_conversion::DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN; | 129 double_conversion::DoubleToStringConverter::EMIT_POSITIVE_EXPONENT_SIGN; |
132 const int kBufferSize = 128; | 130 const int kBufferSize = 128; |
133 | 131 |
134 USE(kMinPrecisionDigits); | 132 USE(kMinPrecisionDigits); |
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151 kMaxLeadingPaddingZeroes, kMaxTrailingPaddingZeroes); | 149 kMaxLeadingPaddingZeroes, kMaxTrailingPaddingZeroes); |
152 | 150 |
153 char* buffer = Thread::Current()->zone()->Alloc<char>(kBufferSize); | 151 char* buffer = Thread::Current()->zone()->Alloc<char>(kBufferSize); |
154 buffer[kBufferSize - 1] = '\0'; | 152 buffer[kBufferSize - 1] = '\0'; |
155 double_conversion::StringBuilder builder(buffer, kBufferSize); | 153 double_conversion::StringBuilder builder(buffer, kBufferSize); |
156 bool status = converter.ToPrecision(d, precision, &builder); | 154 bool status = converter.ToPrecision(d, precision, &builder); |
157 ASSERT(status); | 155 ASSERT(status); |
158 return String::New(builder.Finalize()); | 156 return String::New(builder.Finalize()); |
159 } | 157 } |
160 | 158 |
161 | |
162 bool CStringToDouble(const char* str, intptr_t length, double* result) { | 159 bool CStringToDouble(const char* str, intptr_t length, double* result) { |
163 if (length == 0) { | 160 if (length == 0) { |
164 return false; | 161 return false; |
165 } | 162 } |
166 | 163 |
167 double_conversion::StringToDoubleConverter converter( | 164 double_conversion::StringToDoubleConverter converter( |
168 double_conversion::StringToDoubleConverter::NO_FLAGS, 0.0, 0.0, | 165 double_conversion::StringToDoubleConverter::NO_FLAGS, 0.0, 0.0, |
169 kDoubleToStringCommonInfinitySymbol, kDoubleToStringCommonNaNSymbol); | 166 kDoubleToStringCommonInfinitySymbol, kDoubleToStringCommonNaNSymbol); |
170 | 167 |
171 int parsed_count = 0; | 168 int parsed_count = 0; |
172 *result = | 169 *result = |
173 converter.StringToDouble(str, static_cast<int>(length), &parsed_count); | 170 converter.StringToDouble(str, static_cast<int>(length), &parsed_count); |
174 return (parsed_count == length); | 171 return (parsed_count == length); |
175 } | 172 } |
176 | 173 |
177 | |
178 } // namespace dart | 174 } // namespace dart |
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