v8  3.14.5(node0.10.48)
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) ||
59  (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)) && defined(V8_SHARED)
60 #define V8EXPORT __attribute__ ((visibility("default")))
61 #else
62 #define V8EXPORT
63 #endif
64 
65 #endif // _WIN32
66 
67 
68 namespace v8 {
69 
70 // The result of preparsing is either a stack overflow error, or an opaque
71 // blob of data that can be passed back into the parser.
73  public:
74  PreParserData(size_t size, const uint8_t* data)
75  : data_(data), size_(size) { }
76 
77  // Create a PreParserData value where stack_overflow reports true.
78  static PreParserData StackOverflow() { return PreParserData(0, NULL); }
79 
80  // Whether the pre-parser stopped due to a stack overflow.
81  // If this is the case, size() and data() should not be used.
82  bool stack_overflow() { return size_ == 0u; }
83 
84  // The size of the data in bytes.
85  size_t size() const { return size_; }
86 
87  // Pointer to the data.
88  const uint8_t* data() const { return data_; }
89 
90  private:
91  const uint8_t* const data_;
92  const size_t size_;
93 };
94 
95 
96 // Interface for a stream of Unicode characters.
97 class V8EXPORT UnicodeInputStream { // NOLINT - Thinks V8EXPORT is class name.
98  public:
99  virtual ~UnicodeInputStream();
100 
101  // Returns the next Unicode code-point in the input, or a negative value when
102  // there is no more input in the stream.
103  virtual int32_t Next() = 0;
104 };
105 
106 
107 // Preparse a JavaScript program. The source code is provided as a
108 // UnicodeInputStream. The max_stack_size limits the amount of stack
109 // space that the preparser is allowed to use. If the preparser uses
110 // more stack space than the limit provided, the result's stack_overflow()
111 // method will return true. Otherwise the result contains preparser
112 // data that can be used by the V8 parser to speed up parsing.
114  size_t max_stack_size);
115 
116 } // namespace v8.
117 
118 #endif // PREPARSER_H
size_t size() const
Definition: v8-preparser.h:85
virtual int32_t Next()=0
Definition: v8-debug.h:70
const uint8_t * data() const
Definition: v8-preparser.h:88
virtual ~UnicodeInputStream()
#define V8EXPORT
Definition: v8-preparser.h:62
PreParserData(size_t size, const uint8_t *data)
Definition: v8-preparser.h:74
static PreParserData StackOverflow()
Definition: v8-preparser.h:78
PreParserData V8EXPORT Preparse(UnicodeInputStream *input, size_t max_stack_size)