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       1             : //===- TypeDatabase.h - A collection of CodeView type records ---*- C++ -*-===//
       2             : //
       3             : //                     The LLVM Compiler Infrastructure
       4             : //
       5             : // This file is distributed under the University of Illinois Open Source
       6             : // License. See LICENSE.TXT for details.
       7             : //
       8             : //===----------------------------------------------------------------------===//
       9             : 
      10             : #ifndef LLVM_DEBUGINFO_CODEVIEW_TYPEDATABASE_H
      11             : #define LLVM_DEBUGINFO_CODEVIEW_TYPEDATABASE_H
      12             : 
      13             : #include "llvm/ADT/BitVector.h"
      14             : #include "llvm/ADT/SmallVector.h"
      15             : #include "llvm/ADT/StringRef.h"
      16             : #include "llvm/DebugInfo/CodeView/TypeCollection.h"
      17             : #include "llvm/DebugInfo/CodeView/TypeIndex.h"
      18             : #include "llvm/DebugInfo/CodeView/TypeRecord.h"
      19             : #include "llvm/Support/Allocator.h"
      20             : #include "llvm/Support/StringSaver.h"
      21             : 
      22             : namespace llvm {
      23             : namespace codeview {
      24        1776 : class TypeDatabase : public TypeCollection {
      25             :   friend class RandomAccessTypeVisitor;
      26             : 
      27             : public:
      28             :   explicit TypeDatabase(uint32_t Capacity);
      29             : 
      30             :   /// Records the name of a type, and reserves its type index.
      31             :   TypeIndex appendType(StringRef Name, const CVType &Data);
      32             : 
      33             :   /// Records the name of a type, and reserves its type index.
      34             :   void recordType(StringRef Name, TypeIndex Index, const CVType &Data);
      35             : 
      36             :   /// Saves the name in a StringSet and creates a stable StringRef.
      37             :   StringRef saveTypeName(StringRef TypeName);
      38             : 
      39             :   StringRef getTypeName(TypeIndex Index) const;
      40             : 
      41             :   const CVType &getTypeRecord(TypeIndex Index) const;
      42             :   CVType &getTypeRecord(TypeIndex Index);
      43             : 
      44             :   bool contains(TypeIndex Index) const;
      45             :   uint32_t size() const;
      46             :   uint32_t capacity() const;
      47             :   bool empty() const;
      48             : 
      49             :   CVType getType(TypeIndex Index) override;
      50             :   StringRef getTypeName(TypeIndex Index) override;
      51             :   bool contains(TypeIndex Index) override;
      52             :   uint32_t size() override;
      53             :   uint32_t capacity() override;
      54             : 
      55             :   Optional<TypeIndex> getFirst() override;
      56             :   Optional<TypeIndex> getNext(TypeIndex Prev) override;
      57             : 
      58             :   Optional<TypeIndex> largestTypeIndexLessThan(TypeIndex TI) const;
      59             : 
      60             : private:
      61             :   TypeIndex getAppendIndex() const;
      62             : 
      63             :   void grow();
      64             :   void grow(TypeIndex Index);
      65             : 
      66             :   BumpPtrAllocator Allocator;
      67             : 
      68             :   uint32_t Count = 0;
      69             :   TypeIndex LargestTypeIndex;
      70             : 
      71             :   /// All user defined type records in .debug$T live in here. Type indices
      72             :   /// greater than 0x1000 are user defined. Subtract 0x1000 from the index to
      73             :   /// index into this vector.
      74             :   SmallVector<StringRef, 10> CVUDTNames;
      75             :   SmallVector<CVType, 10> TypeRecords;
      76             : 
      77             :   StringSaver TypeNameStorage;
      78             : 
      79             :   BitVector ValidRecords;
      80             : };
      81             : }
      82             : }
      83             : 
      84             : #endif