OLD | NEW |
(Empty) | |
| 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 PREPARSER_H |
| 29 #define PREPARSER_H |
| 30 |
| 31 #include "v8stdint.h" |
| 32 |
| 33 #ifdef _WIN32 |
| 34 |
| 35 // Setup for Windows DLL export/import. When building the V8 DLL the |
| 36 // BUILDING_V8_SHARED needs to be defined. When building a program which uses |
| 37 // the V8 DLL USING_V8_SHARED needs to be defined. When either building the V8 |
| 38 // static library or building a program which uses the V8 static library neither |
| 39 // BUILDING_V8_SHARED nor USING_V8_SHARED should be defined. |
| 40 #if defined(BUILDING_V8_SHARED) && defined(USING_V8_SHARED) |
| 41 #error both BUILDING_V8_SHARED and USING_V8_SHARED are set - please check the\ |
| 42 build configuration to ensure that at most one of these is set |
| 43 #endif |
| 44 |
| 45 #ifdef BUILDING_V8_SHARED |
| 46 #define V8EXPORT __declspec(dllexport) |
| 47 #elif USING_V8_SHARED |
| 48 #define V8EXPORT __declspec(dllimport) |
| 49 #else |
| 50 #define V8EXPORT |
| 51 #endif // BUILDING_V8_SHARED |
| 52 |
| 53 #else // _WIN32 |
| 54 |
| 55 // Setup for Linux shared library export. There is no need to distinguish |
| 56 // between building or using the V8 shared library, but we should not |
| 57 // export symbols when we are building a static library. |
| 58 #if defined(__GNUC__) && (__GNUC__ >= 4) && defined(V8_SHARED) |
| 59 #define V8EXPORT __attribute__ ((visibility("default"))) |
| 60 #else // defined(__GNUC__) && (__GNUC__ >= 4) |
| 61 #define V8EXPORT |
| 62 #endif // defined(__GNUC__) && (__GNUC__ >= 4) |
| 63 |
| 64 #endif // _WIN32 |
| 65 |
| 66 |
| 67 namespace v8 { |
| 68 |
| 69 |
| 70 class PreParserData { |
| 71 public: |
| 72 PreParserData(size_t size, const uint8_t* data) |
| 73 : data_(data), size_(size) { } |
| 74 |
| 75 // Create a PreParserData value where stack_overflow reports true. |
| 76 static PreParserData StackOverflow() { return PreParserData(NULL, 0); } |
| 77 // Whether the pre-parser stopped due to a stack overflow. |
| 78 // If this is the case, size() and data() should not be used. |
| 79 |
| 80 bool stack_overflow() { return size_ == 0u; } |
| 81 |
| 82 // The size of the data in bytes. |
| 83 size_t size() const { return size_; } |
| 84 |
| 85 // Pointer to the data. |
| 86 const uint8_t* data() const { return data_; } |
| 87 |
| 88 private: |
| 89 const uint8_t* const data_; |
| 90 const size_t size_; |
| 91 }; |
| 92 |
| 93 |
| 94 // Interface for a stream of Unicode characters. |
| 95 class UnicodeInputStream { |
| 96 public: |
| 97 virtual ~UnicodeInputStream(); |
| 98 |
| 99 // Returns the next Unicode code-point in the input, or a negative value when |
| 100 // there is no more input in the stream. |
| 101 virtual int32_t Next() = 0; |
| 102 |
| 103 // Pushes a read character back into the stream, so that it will be the next |
| 104 // to be read by Advance(). The character pushed back must be the most |
| 105 // recently read character that hasn't already been pushed back (i.e., if |
| 106 // pushing back more than one character, they must occur in the opposite order |
| 107 // of the one they were read in). |
| 108 virtual void PushBack(int32_t ch) = 0; |
| 109 }; |
| 110 |
| 111 |
| 112 // Preparse a JavaScript program. The source code is provided as a |
| 113 // UnicodeInputStream. The max_stack_size limits the amount of stack |
| 114 // space that the preparser is allowed to use. If the preparser uses |
| 115 // more stack space than the limit provided, the result's stack_overflow() |
| 116 // method will return true. Otherwise the result contains preparser |
| 117 // data that can be used by the V8 parser to speed up parsing. |
| 118 PreParserData V8EXPORT Preparse(UnicodeInputStream* input, |
| 119 size_t max_stack_size); |
| 120 |
| 121 } // namespace v8. |
| 122 |
| 123 #endif // PREPARSER_H |
OLD | NEW |