| // Copyright 2011 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. |
| |
| #ifndef PREPARSER_H |
| #define PREPARSER_H |
| |
| #include "v8.h" |
| #include "v8stdint.h" |
| |
| namespace v8 { |
| |
| // The result of preparsing is either a stack overflow error, or an opaque |
| // blob of data that can be passed back into the parser. |
| class V8_EXPORT PreParserData { |
| public: |
| PreParserData(size_t size, const uint8_t* data) |
| : data_(data), size_(size) { } |
| |
| // Create a PreParserData value where stack_overflow reports true. |
| static PreParserData StackOverflow() { return PreParserData(0, NULL); } |
| |
| // Whether the pre-parser stopped due to a stack overflow. |
| // If this is the case, size() and data() should not be used. |
| bool stack_overflow() { return size_ == 0u; } |
| |
| // The size of the data in bytes. |
| size_t size() const { return size_; } |
| |
| // Pointer to the data. |
| const uint8_t* data() const { return data_; } |
| |
| private: |
| const uint8_t* const data_; |
| const size_t size_; |
| }; |
| |
| |
| // Interface for a stream of Unicode characters. |
| class V8_EXPORT UnicodeInputStream { // NOLINT - V8_EXPORT is not a class name. |
| public: |
| virtual ~UnicodeInputStream(); |
| |
| // Returns the next Unicode code-point in the input, or a negative value when |
| // there is no more input in the stream. |
| virtual int32_t Next() = 0; |
| }; |
| |
| |
| // Preparse a JavaScript program. The source code is provided as a |
| // UnicodeInputStream. The max_stack_size limits the amount of stack |
| // space that the preparser is allowed to use. If the preparser uses |
| // more stack space than the limit provided, the result's stack_overflow() |
| // method will return true. Otherwise the result contains preparser |
| // data that can be used by the V8 parser to speed up parsing. |
| PreParserData V8_EXPORT Preparse(UnicodeInputStream* input, |
| size_t max_stack_size); |
| |
| } // namespace v8. |
| |
| #endif // PREPARSER_H |