1720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// Copyright 2010 the V8 project authors. All rights reserved. 23484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// Use of this source code is governed by a BSD-style license that can be 33484964a86451e86dcf04be9bd8c0d76ee04f081rossberg@chromium.org// found in the LICENSE file. 4720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org 5720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org#ifndef V8_FIXED_DTOA_H_ 6720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org#define V8_FIXED_DTOA_H_ 7720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org 8720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.orgnamespace v8 { 9720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.orgnamespace internal { 10720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org 11720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// Produces digits necessary to print a given number with 12720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// 'fractional_count' digits after the decimal point. 13720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// The buffer must be big enough to hold the result plus one terminating null 14720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// character. 15720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// 16720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// The produced digits might be too short in which case the caller has to fill 17720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// the gaps with '0's. 18720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// Example: FastFixedDtoa(0.001, 5, ...) is allowed to return buffer = "1", and 19720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// decimal_point = -2. 20720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// Halfway cases are rounded towards +/-Infinity (away from 0). The call 21720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// FastFixedDtoa(0.15, 2, ...) thus returns buffer = "2", decimal_point = 0. 22720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// The returned buffer may contain digits that would be truncated from the 23720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// shortest representation of the input. 24720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// 25720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// This method only works for some parameters. If it can't handle the input it 26720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org// returns false. The output is null-terminated when the function succeeds. 27720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.orgbool FastFixedDtoa(double v, int fractional_count, 28720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org Vector<char> buffer, int* length, int* decimal_point); 29720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org 30720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org} } // namespace v8::internal 31720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org 32720dc0bc17114e33b9b2177fcb6726bda9cabd62sgjesse@chromium.org#endif // V8_FIXED_DTOA_H_ 33