Revert 69187, http://codereview.chromium.org/5730003/. DEPS check failed due...

ppapi/tests/clang/print_names_and_sizes.cc

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Clang plugin which prints the names and sizes of all the top-level
-// structs, enums, and typedefs in the input file.
-
-#include <cstdio>
-#include <string>
-
-#include "clang/AST/AST.h"
-#include "clang/AST/ASTConsumer.h"
-#include "clang/AST/CharUnits.h"
-#include "clang/Basic/SourceManager.h"
-#include "clang/Basic/TargetInfo.h"
-#include "clang/Frontend/CompilerInstance.h"
-#include "clang/Frontend/FrontendPluginRegistry.h"
-
-namespace {
-
-const char* const kTypedefName = "Typedef";
-const char* const kDelim = ",";
-const char* const kHasPointer = "HasPointer";
-const char* const kNoPointer = "NoPointer";
-
-// This class consumes a Clang-parsed AST and prints out information about types
-// defined in the global namespace.  Specifically, for each type definition
-// encountered, it prints:
-// "kind,name,size,has_pointer,source_file,first_line,last_line\n"
-// Where:
-// - kind:  The Clang TypeClassName (Record, Enum, Typedef, Union, etc)
-// - name:  The unmangled string name of the type.
-// - size:  The size in bytes of the type.
-// - has_pointer:  'HasPointer' if the type is or has a pointer.  Otherwise,
-//                 'NoPointer'.
-// - source_file:  The source file in which the type is defined.
-// - first_line:  The first line of the definition (counting from 0).
-// - last_line:  The last line of the definition (counting from 0).
-class PrintNamesAndSizesConsumer : public clang::ASTConsumer {
- public:
-  explicit PrintNamesAndSizesConsumer(clang::SourceManager* source_mgr)
-      : source_manager_(source_mgr) {}
-
- private:
-  // SourceManager has information about source code locations, to help us know
-  // where definitions appear.  We do not own this pointer, so we must not
-  // delete it.
-  clang::SourceManager* source_manager_;
-
-  // Return true iff the type is a pointer or contains a pointer.  This is
-  // important because these types may be different sizes on 32-bit vs 64-bit
-  // platforms.  Structs, enums, and unions that do NOT contain pointers are
-  // crafted to be the same size on 32-bit and 64-bit platforms by convention.
-  bool HasPointer(const clang::Type& type) {
-    if (type.isPointerType()) {
-      return true;
-    } else if (const clang::RecordType* record =
-        dyn_cast<clang::RecordType>(&type)) {
-      // If it's a struct or union, iterate through the fields.  If any of them
-      // contain is or has a pointer, then we have one too.
-      const clang::RecordDecl* decl = record->getDecl();
-      clang::RecordDecl::field_iterator iter(decl->field_begin());
-      clang::RecordDecl::field_iterator end(decl->field_end());
-      for (; iter != end; ++iter) {
-        if (HasPointer(*(iter->getType().getTypePtr()))) {
-          return true;
-        }
-      }
-      // It's a struct or union, but contains no pointers.
-      return false;
-    }
-    // It's not a pointer, a struct, or a union.
-    return false;
-  }
-
-  void PrintTypeInfo(const std::string& name, const clang::Type& type,
-                     const std::string& kind, const clang::CharUnits& size,
-                     const clang::SourceLocation& begin_loc,
-                     const clang::SourceLocation& end_loc) {
-    clang::PresumedLoc presumed_begin(
-        source_manager_->getPresumedLoc(begin_loc));
-    clang::PresumedLoc presumed_end(source_manager_->getPresumedLoc(end_loc));
-    std::printf("%s,%s,%lu,%s,%s,%u,%u\n",
-                kind.c_str(),
-                name.c_str(),
-                size.getQuantity(),
-                HasPointer(type) ? kHasPointer : kNoPointer,
-                presumed_begin.getFilename(),
-                presumed_begin.getLine(),
-                presumed_end.getLine());
-  }
-
-  // Virtual function to consume top-level declarations.  For each one, we check
-  // to see if it is a type definition.  If it is, we print information about
-  // it.
-  virtual void HandleTopLevelDecl(clang::DeclGroupRef decl_group) {
-    clang::DeclGroupRef::iterator iter(decl_group.begin());
-    clang::DeclGroupRef::iterator the_end(decl_group.end());
-    for (; iter != the_end; ++iter) {
-      const clang::Decl *decl = *iter;
-      if (const clang::TypeDecl* type_decl = dyn_cast<clang::TypeDecl>(decl)) {
-        std::string name(type_decl->getNameAsString());
-        clang::SourceLocation start_loc = type_decl->getLocStart();
-        clang::SourceLocation end_loc = type_decl->getLocEnd();
-        // TagDecl covers structs, enums, unions, and classes.
-        if (const clang::TagDecl* tag = dyn_cast<clang::TagDecl>(type_decl)) {
-          // Only print out info when we find the definition;  ignore forward
-          // references.
-          if (tag->isDefinition()) {
-            clang::Type* type = type_decl->getTypeForDecl();
-            clang::CharUnits size =
-                tag->getASTContext().getTypeSizeInChars(type);
-            PrintTypeInfo(name, *type, type->getTypeClassName(), size,
-                          start_loc, end_loc);
-          }
-        } else if (const clang::TypedefDecl* td =
-                   dyn_cast<clang::TypedefDecl>(type_decl)) {
-          clang::Type* type = td->getUnderlyingType().getTypePtr();
-          clang::CharUnits size = td->getASTContext().getTypeSizeInChars(type);
-          PrintTypeInfo(name, *type, kTypedefName, size, start_loc, end_loc);
-        }
-      }
-    }
-  }
-};
-
-class PrintNamesAndSizesAction : public clang::PluginASTAction {
- public:
-  PrintNamesAndSizesAction() {}
-
- private:
-  virtual clang::ASTConsumer *CreateASTConsumer(
-      clang::CompilerInstance &instance, llvm::StringRef /*input_file*/) {
-    return new PrintNamesAndSizesConsumer(
-        &(instance.getDiagnostics().getSourceManager()));
-  }
-
-  // We don't accept any arguments, but ParseArgs is pure-virtual.
-  virtual bool ParseArgs(const clang::CompilerInstance& /*instance*/,
-                         const std::vector<std::string>& /*args*/) {
-    return true;
-  }
-};
-
-}  // namespace
-
-static clang::FrontendPluginRegistry::Add<PrintNamesAndSizesAction>
-X("PrintNamesAndSizes",
-  "Print the names and sizes of classes, enums, and typedefs.");
-