v8  3.11.10(node0.8.28)
V8 is Google's open source JavaScript engine
v8-preparser.h
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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.
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.
113  size_t max_stack_size);
114 
115 } // namespace v8.
116 
117 #endif // PREPARSER_H
size_t size() const
Definition: v8-preparser.h:84
virtual int32_t Next()=0
Definition: v8-debug.h:70
const uint8_t * data() const
Definition: v8-preparser.h:87
virtual ~UnicodeInputStream()
#define V8EXPORT
Definition: v8-preparser.h:61
PreParserData(size_t size, const uint8_t *data)
Definition: v8-preparser.h:73
static PreParserData StackOverflow()
Definition: v8-preparser.h:77
PreParserData V8EXPORT Preparse(UnicodeInputStream *input, size_t max_stack_size)