1 //===- MemoryBufferRef.h - Memory Buffer Reference --------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 //  This file defines the MemoryBuffer interface.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_SUPPORT_MEMORYBUFFERREF_H
14 #define LLVM_SUPPORT_MEMORYBUFFERREF_H
15 
16 #include "llvm/ADT/StringRef.h"
17 
18 namespace llvm {
19 
20 class MemoryBuffer;
21 
22 class MemoryBufferRef {
23   StringRef Buffer;
24   StringRef Identifier;
25 
26 public:
27   MemoryBufferRef() = default;
28   MemoryBufferRef(const MemoryBuffer &Buffer);
29   MemoryBufferRef(StringRef Buffer, StringRef Identifier)
30       : Buffer(Buffer), Identifier(Identifier) {}
31 
32   StringRef getBuffer() const { return Buffer; }
33   StringRef getBufferIdentifier() const { return Identifier; }
34 
35   const char *getBufferStart() const { return Buffer.begin(); }
36   const char *getBufferEnd() const { return Buffer.end(); }
37   size_t getBufferSize() const { return Buffer.size(); }
38 
39   /// Check pointer identity (not value) of identifier and data.
40   friend bool operator==(const MemoryBufferRef &LHS,
41                          const MemoryBufferRef &RHS) {
42     return LHS.Buffer.begin() == RHS.Buffer.begin() &&
43            LHS.Buffer.end() == RHS.Buffer.end() &&
44            LHS.Identifier.begin() == RHS.Identifier.begin() &&
45            LHS.Identifier.end() == RHS.Identifier.end();
46   }
47 
48   friend bool operator!=(const MemoryBufferRef &LHS,
49                          const MemoryBufferRef &RHS) {
50     return !(LHS == RHS);
51   }
52 };
53 
54 } // namespace llvm
55 
56 #endif // LLVM_SUPPORT_MEMORYBUFFERREF_H
57