| // Copyright 2010 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include <math.h> |
| |
| #include "v8.h" |
| #include "dtoa.h" |
| |
| #include "double.h" |
| #include "fast-dtoa.h" |
| #include "fixed-dtoa.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| bool DoubleToAscii(double v, DtoaMode mode, int requested_digits, |
| Vector<char> buffer, int* sign, int* length, int* point) { |
| ASSERT(!Double(v).IsSpecial()); |
| ASSERT(mode == DTOA_SHORTEST || requested_digits >= 0); |
| |
| if (Double(v).Sign() < 0) { |
| *sign = 1; |
| v = -v; |
| } else { |
| *sign = 0; |
| } |
| |
| if (v == 0) { |
| buffer[0] = '0'; |
| buffer[1] = '\0'; |
| *length = 1; |
| *point = 1; |
| return true; |
| } |
| |
| if (mode == DTOA_PRECISION && requested_digits == 0) { |
| buffer[0] = '\0'; |
| *length = 0; |
| return true; |
| } |
| |
| switch (mode) { |
| case DTOA_SHORTEST: |
| return FastDtoa(v, FAST_DTOA_SHORTEST, 0, buffer, length, point); |
| case DTOA_FIXED: |
| return FastFixedDtoa(v, requested_digits, buffer, length, point); |
| case DTOA_PRECISION: |
| return FastDtoa(v, FAST_DTOA_PRECISION, requested_digits, |
| buffer, length, point); |
| } |
| return false; |
| } |
| |
| } } // namespace v8::internal |