| 1 | //===--- ScratchBuffer.h - Scratch space for forming tokens -----*- 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 ScratchBuffer interface. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #ifndef LLVM_CLANG_LEX_SCRATCHBUFFER_H |
| 14 | #define LLVM_CLANG_LEX_SCRATCHBUFFER_H |
| 15 | |
| 16 | #include "clang/Basic/SourceLocation.h" |
| 17 | |
| 18 | namespace clang { |
| 19 | class SourceManager; |
| 20 | |
| 21 | /// ScratchBuffer - This class exposes a simple interface for the dynamic |
| 22 | /// construction of tokens. This is used for builtin macros (e.g. __LINE__) as |
| 23 | /// well as token pasting, etc. |
| 24 | class ScratchBuffer { |
| 25 | SourceManager &SourceMgr; |
| 26 | char *CurBuffer; |
| 27 | SourceLocation BufferStartLoc; |
| 28 | unsigned BytesUsed; |
| 29 | public: |
| 30 | ScratchBuffer(SourceManager &SM); |
| 31 | |
| 32 | /// getToken - Splat the specified text into a temporary MemoryBuffer and |
| 33 | /// return a SourceLocation that refers to the token. This is just like the |
| 34 | /// previous method, but returns a location that indicates the physloc of the |
| 35 | /// token. |
| 36 | SourceLocation getToken(const char *Buf, unsigned Len, const char *&DestPtr); |
| 37 | |
| 38 | private: |
| 39 | void AllocScratchBuffer(unsigned RequestLen); |
| 40 | }; |
| 41 | |
| 42 | } // end namespace clang |
| 43 | |
| 44 | #endif |
| 45 |