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      1 // Copyright 2009 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 #include "v8.h"
     29 
     30 #include "ast.h"
     31 #include "func-name-inferrer.h"
     32 
     33 namespace v8 {
     34 namespace internal {
     35 
     36 
     37 void FuncNameInferrer::PushEnclosingName(Handle<String> name) {
     38   // Enclosing name is a name of a constructor function. To check
     39   // that it is really a constructor, we check that it is not empty
     40   // and starts with a capital letter.
     41   if (name->length() > 0 && Runtime::IsUpperCaseChar(
     42       Isolate::Current()->runtime_state(), name->Get(0))) {
     43     names_stack_.Add(name);
     44   }
     45 }
     46 
     47 
     48 void FuncNameInferrer::PushLiteralName(Handle<String> name) {
     49   if (IsOpen() && !HEAP->prototype_symbol()->Equals(*name)) {
     50     names_stack_.Add(name);
     51   }
     52 }
     53 
     54 
     55 void FuncNameInferrer::PushVariableName(Handle<String> name) {
     56   if (IsOpen() && !HEAP->result_symbol()->Equals(*name)) {
     57     names_stack_.Add(name);
     58   }
     59 }
     60 
     61 
     62 Handle<String> FuncNameInferrer::MakeNameFromStack() {
     63   if (names_stack_.is_empty()) {
     64     return FACTORY->empty_string();
     65   } else {
     66     return MakeNameFromStackHelper(1, names_stack_.at(0));
     67   }
     68 }
     69 
     70 
     71 Handle<String> FuncNameInferrer::MakeNameFromStackHelper(int pos,
     72                                                          Handle<String> prev) {
     73   if (pos >= names_stack_.length()) {
     74     return prev;
     75   } else {
     76     Handle<String> curr = FACTORY->NewConsString(dot_, names_stack_.at(pos));
     77     return MakeNameFromStackHelper(pos + 1, FACTORY->NewConsString(prev, curr));
     78   }
     79 }
     80 
     81 
     82 void FuncNameInferrer::InferFunctionsNames() {
     83   Handle<String> func_name = MakeNameFromStack();
     84   for (int i = 0; i < funcs_to_infer_.length(); ++i) {
     85     funcs_to_infer_[i]->set_inferred_name(func_name);
     86   }
     87   funcs_to_infer_.Rewind(0);
     88 }
     89 
     90 
     91 } }  // namespace v8::internal
     92