| /* |
| * Copyright (C) 2019 Apple, Inc. 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 APPLE INC. ``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 APPLE INC. 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. |
| */ |
| |
| #pragma once |
| |
| #include "StringPrototype.h" |
| |
| namespace JSC { |
| |
| template<typename NumberType> |
| ALWAYS_INLINE JSString* stringSlice(JSGlobalObject* globalObject, VM& vm, JSString* string, int32_t length, NumberType start, NumberType end) |
| { |
| NumberType from = start < 0 ? length + start : start; |
| NumberType to = end < 0 ? length + end : end; |
| if (to > from && to > 0 && from < length) { |
| if (from < 0) |
| from = 0; |
| if (to > length) |
| to = length; |
| return jsSubstring(vm, globalObject, string, static_cast<unsigned>(from), static_cast<unsigned>(to) - static_cast<unsigned>(from)); |
| } |
| return jsEmptyString(vm); |
| } |
| |
| } // namespace JSC |
