// Copyright (c) 2013, Kenton Varda <temporal@gmail.com> // All rights reserved. // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are met: // // 1. Redistributions of source code must retain the above copyright notice, this // list of conditions and the following disclaimer. // 2. 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. // // 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 "char.h" #include "../debug.h" #include <stdlib.h> namespace kj { namespace parse { namespace _ { // private double ParseFloat::operator()(const Array<char>& digits, const Maybe<Array<char>>& fraction, const Maybe<Tuple<Maybe<char>, Array<char>>>& exponent) const { size_t bufSize = digits.size(); KJ_IF_MAYBE(f, fraction) { bufSize += 1 + f->size(); } KJ_IF_MAYBE(e, exponent) { bufSize += 1 + (get<0>(*e) != nullptr) + get<1>(*e).size(); } KJ_STACK_ARRAY(char, buf, bufSize + 1, 128, 128); char* pos = buf.begin(); memcpy(pos, digits.begin(), digits.size()); pos += digits.size(); KJ_IF_MAYBE(f, fraction) { *pos++ = '.'; memcpy(pos, f->begin(), f->size()); pos += f->size(); } KJ_IF_MAYBE(e, exponent) { *pos++ = 'e'; KJ_IF_MAYBE(sign, get<0>(*e)) { *pos++ = *sign; } memcpy(pos, get<1>(*e).begin(), get<1>(*e).size()); pos += get<1>(*e).size(); } *pos++ = '\0'; KJ_DASSERT(pos == buf.end()); return strtod(buf.begin(), nullptr); } } // namespace _ (private) } // namespace parse } // namespace kj