1 // Copyright 2011 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 // The result of preparsing is either a stack overflow error, or an opaque 70 // blob of data that can be passed back into the parser. 71 class V8EXPORT PreParserData { 72 public: 73 PreParserData(size_t size, const uint8_t* data) 74 : data_(data), size_(size) { } 75 76 // Create a PreParserData value where stack_overflow reports true. 77 static PreParserData StackOverflow() { return PreParserData(0, NULL); } 78 79 // Whether the pre-parser stopped due to a stack overflow. 80 // If this is the case, size() and data() should not be used. 81 bool stack_overflow() { return size_ == 0u; } 82 83 // The size of the data in bytes. 84 size_t size() const { return size_; } 85 86 // Pointer to the data. 87 const uint8_t* data() const { return data_; } 88 89 private: 90 const uint8_t* const data_; 91 const size_t size_; 92 }; 93 94 95 // Interface for a stream of Unicode characters. 96 class V8EXPORT UnicodeInputStream { // NOLINT - Thinks V8EXPORT is class name. 97 public: 98 virtual ~UnicodeInputStream(); 99 100 // Returns the next Unicode code-point in the input, or a negative value when 101 // there is no more input in the stream. 102 virtual int32_t Next() = 0; 103 }; 104 105 106 // Preparse a JavaScript program. The source code is provided as a 107 // UnicodeInputStream. The max_stack_size limits the amount of stack 108 // space that the preparser is allowed to use. If the preparser uses 109 // more stack space than the limit provided, the result's stack_overflow() 110 // method will return true. Otherwise the result contains preparser 111 // data that can be used by the V8 parser to speed up parsing. 112 PreParserData V8EXPORT Preparse(UnicodeInputStream* input, 113 size_t max_stack_size); 114 115 } // namespace v8. 116 117 #endif // PREPARSER_H 118
