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 #ifndef V8_FIXED_DTOA_H_ 29 #define V8_FIXED_DTOA_H_ 30 31 namespace v8 { 32 namespace internal { 33 34 // Produces digits necessary to print a given number with 35 // 'fractional_count' digits after the decimal point. 36 // The buffer must be big enough to hold the result plus one terminating null 37 // character. 38 // 39 // The produced digits might be too short in which case the caller has to fill 40 // the gaps with '0's. 41 // Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and 42 // decimal_point = -2. 43 // Halfway cases are rounded towards +/-Infinity (away from 0). The call 44 // FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. 45 // The returned buffer may contain digits that would be truncated from the 46 // shortest representation of the input. 47 // 48 // This method only works for some parameters. If it can't handle the input it 49 // returns false. The output is null-terminated when the function succeeds. 50 bool FastFixedDtoa(double v, int fractional_count, 51 Vector<char> buffer, int* length, int* decimal_point); 52 53 } } // namespace v8::internal 54 55 #endif // V8_FIXED_DTOA_H_ 56
