1193326Sed//===--- ScratchBuffer.h - Scratch space for forming tokens -----*- C++ -*-===//
2193326Sed//
3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4353358Sdim// See https://llvm.org/LICENSE.txt for license information.
5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6193326Sed//
7193326Sed//===----------------------------------------------------------------------===//
8193326Sed//
9193326Sed//  This file defines the ScratchBuffer interface.
10193326Sed//
11193326Sed//===----------------------------------------------------------------------===//
12193326Sed
13280031Sdim#ifndef LLVM_CLANG_LEX_SCRATCHBUFFER_H
14280031Sdim#define LLVM_CLANG_LEX_SCRATCHBUFFER_H
15193326Sed
16193326Sed#include "clang/Basic/SourceLocation.h"
17193326Sed
18193326Sednamespace clang {
19193326Sed  class SourceManager;
20193326Sed
21193326Sed/// ScratchBuffer - This class exposes a simple interface for the dynamic
22193326Sed/// construction of tokens.  This is used for builtin macros (e.g. __LINE__) as
23193326Sed/// well as token pasting, etc.
24193326Sedclass ScratchBuffer {
25193326Sed  SourceManager &SourceMgr;
26193326Sed  char *CurBuffer;
27193326Sed  SourceLocation BufferStartLoc;
28193326Sed  unsigned BytesUsed;
29193326Sedpublic:
30193326Sed  ScratchBuffer(SourceManager &SM);
31198092Srdivacky
32193326Sed  /// getToken - Splat the specified text into a temporary MemoryBuffer and
33193326Sed  /// return a SourceLocation that refers to the token.  This is just like the
34193326Sed  /// previous method, but returns a location that indicates the physloc of the
35193326Sed  /// token.
36193326Sed  SourceLocation getToken(const char *Buf, unsigned Len, const char *&DestPtr);
37198092Srdivacky
38193326Sedprivate:
39193326Sed  void AllocScratchBuffer(unsigned RequestLen);
40193326Sed};
41193326Sed
42193326Sed} // end namespace clang
43193326Sed
44193326Sed#endif
45