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| 1 // Copyright 2010 the V8 project authors. All rights reserved. | |
| 2 // Redistribution and use in source and binary forms, with or without | |
| 3 // modification, are permitted provided that the following conditions are | |
| 4 // met: | |
| 5 // | |
| 6 // * Redistributions of source code must retain the above copyright | |
| 7 // notice, this list of conditions and the following disclaimer. | |
| 8 // * Redistributions in binary form must reproduce the above | |
| 9 // copyright notice, this list of conditions and the following | |
| 10 // disclaimer in the documentation and/or other materials provided | |
| 11 // with the distribution. | |
| 12 // * Neither the name of Google Inc. nor the names of its | |
| 13 // contributors may be used to endorse or promote products derived | |
| 14 // from this software without specific prior written permission. | |
| 15 // | |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 | |
| 28 #include <math.h> | |
| 29 | |
| 30 #include "v8.h" | |
| 31 #include "dtoa.h" | |
| 32 | |
| 33 #include "double.h" | |
| 34 #include "fast-dtoa.h" | |
| 35 #include "fixed-dtoa.h" | |
| 36 | |
| 37 namespace v8 { | |
| 38 namespace internal { | |
| 39 | |
| 40 bool DoubleToAscii(double v, DtoaMode mode, int requested_digits, | |
| 41 Vector<char> buffer, int* sign, int* length, int* point) { | |
| 42 ASSERT(!Double(v).IsSpecial()); | |
| 43 ASSERT(mode == DTOA_SHORTEST || requested_digits >= 0); | |
| 44 | |
| 45 if (Double(v).Sign() < 0) { | |
| 46 *sign = 1; | |
| 47 v = -v; | |
| 48 } else { | |
| 49 *sign = 0; | |
| 50 } | |
| 51 | |
| 52 if (v == 0) { | |
| 53 buffer[0] = '0'; | |
| 54 buffer[1] = '\0'; | |
| 55 *length = 1; | |
| 56 *point = 1; | |
| 57 return true; | |
| 58 } | |
| 59 | |
| 60 if (mode == DTOA_PRECISION && requested_digits == 0) { | |
| 61 buffer[0] = '\0'; | |
| 62 *length = 0; | |
| 63 return true; | |
| 64 } | |
| 65 | |
| 66 switch (mode) { | |
| 67 case DTOA_SHORTEST: | |
| 68 return FastDtoa(v, buffer, length, point); | |
| 69 case DTOA_FIXED: | |
| 70 return FastFixedDtoa(v, requested_digits, buffer, length, point); | |
| 71 default: | |
| 72 break; | |
| 73 } | |
| 74 return false; | |
| 75 } | |
| 76 | |
| 77 } } // namespace v8::internal | |
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