1 //===- IPDBStreamData.h - Base interface for PDB Stream Data ----*- 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_PDB_RAW_IPDBSTREAMDATA_H 11 #define LLVM_DEBUGINFO_PDB_RAW_IPDBSTREAMDATA_H 12 13 #include "llvm/ADT/ArrayRef.h" 14 #include "llvm/Support/Endian.h" 15 16 namespace llvm { 17 namespace pdb { 18 /// IPDBStream abstracts the notion of PDB stream data. Although we already 19 /// have another stream abstraction (namely in the form of StreamInterface 20 /// and MappedBlockStream), they assume that the stream data is referenced 21 /// the same way. Namely, by looking in the directory to get the list of 22 /// stream blocks, and by looking in the array of stream lengths to get the 23 /// length. This breaks down for the directory itself, however, since its 24 /// length and list of blocks are stored elsewhere. By abstracting the 25 /// notion of stream data further, we can use a MappedBlockStream to read 26 /// from the directory itself, or from an indexed stream which references 27 /// the directory. 28 class IPDBStreamData { 29 public: ~IPDBStreamData()30 virtual ~IPDBStreamData() {} 31 32 virtual uint32_t getLength() = 0; 33 virtual ArrayRef<support::ulittle32_t> getStreamBlocks() = 0; 34 }; 35 } 36 } 37 38 #endif 39