1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
// Copyright 2006-2008 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 V8_PARSER_H_
#define V8_PARSER_H_
#include "scanner.h"
#include "allocation.h"
namespace v8 {
namespace internal {
class ParserMessage : public Malloced {
public:
ParserMessage(Scanner::Location loc, const char* message,
Vector<const char*> args)
: loc_(loc),
message_(message),
args_(args) { }
~ParserMessage();
Scanner::Location location() { return loc_; }
const char* message() { return message_; }
Vector<const char*> args() { return args_; }
private:
Scanner::Location loc_;
const char* message_;
Vector<const char*> args_;
};
class FunctionEntry BASE_EMBEDDED {
public:
explicit FunctionEntry(Vector<unsigned> backing) : backing_(backing) { }
FunctionEntry() : backing_(Vector<unsigned>::empty()) { }
int start_pos() { return backing_[kStartPosOffset]; }
void set_start_pos(int value) { backing_[kStartPosOffset] = value; }
int end_pos() { return backing_[kEndPosOffset]; }
void set_end_pos(int value) { backing_[kEndPosOffset] = value; }
int literal_count() { return backing_[kLiteralCountOffset]; }
void set_literal_count(int value) { backing_[kLiteralCountOffset] = value; }
int property_count() { return backing_[kPropertyCountOffset]; }
void set_property_count(int value) { backing_[kPropertyCountOffset] = value; }
bool contains_array_literal() {
return backing_[kContainsArrayLiteralOffset] != 0;
}
void set_contains_array_literal(bool value) {
backing_[kContainsArrayLiteralOffset] = value ? 1 : 0;
}
bool is_valid() { return backing_.length() > 0; }
static const int kSize = 5;
private:
Vector<unsigned> backing_;
static const int kStartPosOffset = 0;
static const int kEndPosOffset = 1;
static const int kLiteralCountOffset = 2;
static const int kPropertyCountOffset = 3;
static const int kContainsArrayLiteralOffset = 4;
};
class ScriptDataImpl : public ScriptData {
public:
explicit ScriptDataImpl(Vector<unsigned> store)
: store_(store),
last_entry_(0) { }
virtual ~ScriptDataImpl();
virtual int Length();
virtual unsigned* Data();
FunctionEntry GetFunctionEnd(int start);
bool SanityCheck();
Scanner::Location MessageLocation();
const char* BuildMessage();
Vector<const char*> BuildArgs();
bool has_error() { return store_[kHasErrorOffset]; }
unsigned magic() { return store_[kMagicOffset]; }
unsigned version() { return store_[kVersionOffset]; }
static const unsigned kMagicNumber = 0xBadDead;
static const unsigned kCurrentVersion = 1;
static const unsigned kMagicOffset = 0;
static const unsigned kVersionOffset = 1;
static const unsigned kHasErrorOffset = 2;
static const unsigned kSizeOffset = 3;
static const unsigned kHeaderSize = 4;
private:
unsigned Read(int position);
unsigned* ReadAddress(int position);
int EntryCount();
FunctionEntry nth(int n);
Vector<unsigned> store_;
// The last entry returned. This is used to make lookup faster:
// the next entry to return is typically the next entry so lookup
// will usually be much faster if we start from the last entry.
int last_entry_;
};
// The parser: Takes a script and and context information, and builds a
// FunctionLiteral AST node. Returns NULL and deallocates any allocated
// AST nodes if parsing failed.
FunctionLiteral* MakeAST(bool compile_in_global_context,
Handle<Script> script,
v8::Extension* extension,
ScriptDataImpl* pre_data);
ScriptDataImpl* PreParse(Handle<String> source,
unibrow::CharacterStream* stream,
v8::Extension* extension);
bool ParseRegExp(FlatStringReader* input,
bool multiline,
RegExpCompileData* result);
// Support for doing lazy compilation. The script is the script containing full
// source of the script where the function is declared. The start_position and
// end_position specifies the part of the script source which has the source
// for the function declaration in the form:
//
// (<formal parameters>) { <function body> }
//
// without any function keyword or name.
//
FunctionLiteral* MakeLazyAST(Handle<Script> script,
Handle<String> name,
int start_position,
int end_position,
bool is_expression);
// Support for handling complex values (array and object literals) that
// can be fully handled at compile time.
class CompileTimeValue: public AllStatic {
public:
enum Type {
OBJECT_LITERAL,
ARRAY_LITERAL
};
static bool IsCompileTimeValue(Expression* expression);
// Get the value as a compile time value.
static Handle<FixedArray> GetValue(Expression* expression);
// Get the type of a compile time value returned by GetValue().
static Type GetType(Handle<FixedArray> value);
// Get the elements array of a compile time value returned by GetValue().
static Handle<FixedArray> GetElements(Handle<FixedArray> value);
private:
static const int kTypeSlot = 0;
static const int kElementsSlot = 1;
DISALLOW_IMPLICIT_CONSTRUCTORS(CompileTimeValue);
};
} } // namespace v8::internal
#endif // V8_PARSER_H_
|
