1 // Copyright 2006-2008 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
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.
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.
28 #ifndef V8_STRING_STREAM_H_
29 #define V8_STRING_STREAM_H_
35 class StringAllocator {
37 virtual ~StringAllocator() {}
38 // Allocate a number of bytes.
39 virtual char* allocate(unsigned bytes) = 0;
40 // Allocate a larger number of bytes and copy the old buffer to the new one.
41 // bytes is an input and output parameter passing the old size of the buffer
42 // and returning the new size. If allocation fails then we return the old
43 // buffer and do not increase the size.
44 virtual char* grow(unsigned* bytes) = 0;
48 // Normal allocator uses new[] and delete[].
49 class HeapStringAllocator: public StringAllocator {
51 ~HeapStringAllocator() { DeleteArray(space_); }
52 char* allocate(unsigned bytes);
53 char* grow(unsigned* bytes);
59 // Allocator for use when no new c++ heap allocation is allowed.
60 // Given a preallocated buffer up front and does no allocation while
62 class NoAllocationStringAllocator: public StringAllocator {
64 NoAllocationStringAllocator(char* memory, unsigned size);
65 char* allocate(unsigned bytes) { return space_; }
66 char* grow(unsigned* bytes);
75 FmtElm(int value) : type_(INT) { // NOLINT
78 explicit FmtElm(double value) : type_(DOUBLE) {
79 data_.u_double_ = value;
81 FmtElm(const char* value) : type_(C_STR) { // NOLINT
82 data_.u_c_str_ = value;
84 FmtElm(const Vector<const uc16>& value) : type_(LC_STR) { // NOLINT
85 data_.u_lc_str_ = &value;
87 FmtElm(Object* value) : type_(OBJ) { // NOLINT
90 FmtElm(Handle<Object> value) : type_(HANDLE) { // NOLINT
91 data_.u_handle_ = value.location();
93 FmtElm(void* value) : type_(POINTER) { // NOLINT
94 data_.u_pointer_ = value;
98 friend class StringStream;
99 enum Type { INT, DOUBLE, C_STR, LC_STR, OBJ, HANDLE, POINTER };
104 const char* u_c_str_;
105 const Vector<const uc16>* u_lc_str_;
115 explicit StringStream(StringAllocator* allocator):
116 allocator_(allocator),
117 capacity_(kInitialCapacity),
119 buffer_(allocator_->allocate(kInitialCapacity)) {
127 bool Put(String* str);
128 bool Put(String* str, int start, int end);
129 void Add(Vector<const char> format, Vector<FmtElm> elms);
130 void Add(const char* format);
131 void Add(Vector<const char> format);
132 void Add(const char* format, FmtElm arg0);
133 void Add(const char* format, FmtElm arg0, FmtElm arg1);
134 void Add(const char* format, FmtElm arg0, FmtElm arg1, FmtElm arg2);
135 void Add(const char* format,
141 // Getting the message out.
142 void OutputToFile(FILE* out);
143 void OutputToStdOut() { OutputToFile(stdout); }
145 Handle<String> ToString();
146 SmartArrayPointer<const char> ToCString() const;
147 int length() const { return length_; }
149 // Object printing support.
150 void PrintName(Object* o);
151 void PrintFixedArray(FixedArray* array, unsigned int limit);
152 void PrintByteArray(ByteArray* ba);
153 void PrintUsingMap(JSObject* js_object);
154 void PrintPrototype(JSFunction* fun, Object* receiver);
155 void PrintSecurityTokenIfChanged(Object* function);
156 // NOTE: Returns the code in the output parameter.
157 void PrintFunction(Object* function, Object* receiver, Code** code);
165 // Mentioned object cache support.
166 void PrintMentionedObjectCache();
167 static void ClearMentionedObjectCache();
169 static bool IsMentionedObjectCacheClear();
173 static const int kInitialCapacity = 16;
176 void PrintObject(Object* obj);
178 StringAllocator* allocator_;
180 unsigned length_; // does not include terminating 0-character
183 bool full() const { return (capacity_ - length_) == 1; }
184 int space() const { return capacity_ - length_; }
186 DISALLOW_IMPLICIT_CONSTRUCTORS(StringStream);
190 } } // namespace v8::internal
192 #endif // V8_STRING_STREAM_H_