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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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49 // We cast to const uint8_t* here to avoid instantiating the | 49 // We cast to const uint8_t* here to avoid instantiating the |
50 // InternalStringToDouble() template for const char* as well. | 50 // InternalStringToDouble() template for const char* as well. |
51 const uint8_t* start = reinterpret_cast<const uint8_t*>(str); | 51 const uint8_t* start = reinterpret_cast<const uint8_t*>(str); |
52 const uint8_t* end = start + StrLength(str); | 52 const uint8_t* end = start + StrLength(str); |
53 return InternalStringToDouble(unicode_cache, start, end, flags, | 53 return InternalStringToDouble(unicode_cache, start, end, flags, |
54 empty_string_val); | 54 empty_string_val); |
55 } | 55 } |
56 | 56 |
57 | 57 |
58 double StringToDouble(UnicodeCache* unicode_cache, | 58 double StringToDouble(UnicodeCache* unicode_cache, |
59 Vector<const char> str, | 59 Vector<const uint8_t> str, |
60 int flags, | 60 int flags, |
61 double empty_string_val) { | 61 double empty_string_val) { |
62 // We cast to const uint8_t* here to avoid instantiating the | 62 // We cast to const uint8_t* here to avoid instantiating the |
63 // InternalStringToDouble() template for const char* as well. | 63 // InternalStringToDouble() template for const char* as well. |
64 const uint8_t* start = reinterpret_cast<const uint8_t*>(str.start()); | 64 const uint8_t* start = reinterpret_cast<const uint8_t*>(str.start()); |
65 const uint8_t* end = start + str.length(); | 65 const uint8_t* end = start + str.length(); |
66 return InternalStringToDouble(unicode_cache, start, end, flags, | 66 return InternalStringToDouble(unicode_cache, start, end, flags, |
67 empty_string_val); | 67 empty_string_val); |
68 } | 68 } |
69 | 69 |
70 | 70 |
71 double StringToDouble(UnicodeCache* unicode_cache, | 71 double StringToDouble(UnicodeCache* unicode_cache, |
72 Vector<const uc16> str, | 72 Vector<const uc16> str, |
73 int flags, | 73 int flags, |
74 double empty_string_val) { | 74 double empty_string_val) { |
75 const uc16* end = str.start() + str.length(); | 75 const uc16* end = str.start() + str.length(); |
76 return InternalStringToDouble(unicode_cache, str.start(), end, flags, | 76 return InternalStringToDouble(unicode_cache, str.start(), end, flags, |
77 empty_string_val); | 77 empty_string_val); |
78 } | 78 } |
79 | 79 |
80 | 80 |
| 81 // Converts a string into an integer. |
| 82 double StringToInt(UnicodeCache* unicode_cache, |
| 83 Vector<const uint8_t> vector, |
| 84 int radix) { |
| 85 return InternalStringToInt( |
| 86 unicode_cache, vector.start(), vector.start() + vector.length(), radix); |
| 87 } |
| 88 |
| 89 |
| 90 double StringToInt(UnicodeCache* unicode_cache, |
| 91 Vector<const uc16> vector, |
| 92 int radix) { |
| 93 return InternalStringToInt( |
| 94 unicode_cache, vector.start(), vector.start() + vector.length(), radix); |
| 95 } |
| 96 |
| 97 |
81 const char* DoubleToCString(double v, Vector<char> buffer) { | 98 const char* DoubleToCString(double v, Vector<char> buffer) { |
82 switch (fpclassify(v)) { | 99 switch (fpclassify(v)) { |
83 case FP_NAN: return "NaN"; | 100 case FP_NAN: return "NaN"; |
84 case FP_INFINITE: return (v < 0.0 ? "-Infinity" : "Infinity"); | 101 case FP_INFINITE: return (v < 0.0 ? "-Infinity" : "Infinity"); |
85 case FP_ZERO: return "0"; | 102 case FP_ZERO: return "0"; |
86 default: { | 103 default: { |
87 SimpleStringBuilder builder(buffer.start(), buffer.length()); | 104 SimpleStringBuilder builder(buffer.start(), buffer.length()); |
88 int decimal_point; | 105 int decimal_point; |
89 int sign; | 106 int sign; |
90 const int kV8DtoaBufferCapacity = kBase10MaximalLength + 1; | 107 const int kV8DtoaBufferCapacity = kBase10MaximalLength + 1; |
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437 if (decimal_pos > 0) result_size++; | 454 if (decimal_pos > 0) result_size++; |
438 // Allocate result and fill in the parts. | 455 // Allocate result and fill in the parts. |
439 SimpleStringBuilder builder(result_size + 1); | 456 SimpleStringBuilder builder(result_size + 1); |
440 builder.AddSubstring(integer_buffer + integer_pos + 1, integer_part_size); | 457 builder.AddSubstring(integer_buffer + integer_pos + 1, integer_part_size); |
441 if (decimal_pos > 0) builder.AddCharacter('.'); | 458 if (decimal_pos > 0) builder.AddCharacter('.'); |
442 builder.AddSubstring(decimal_buffer, decimal_pos); | 459 builder.AddSubstring(decimal_buffer, decimal_pos); |
443 return builder.Finalize(); | 460 return builder.Finalize(); |
444 } | 461 } |
445 | 462 |
446 } } // namespace v8::internal | 463 } } // namespace v8::internal |
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