1ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao//===--- ScratchBuffer.h - Scratch space for forming tokens -----*- C++ -*-===// 2ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// 3ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// The LLVM Compiler Infrastructure 4ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// 5ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// This file is distributed under the University of Illinois Open Source 6ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// License. See LICENSE.TXT for details. 7ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// 8ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao//===----------------------------------------------------------------------===// 9ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// 10ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// This file defines the ScratchBuffer interface. 11ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao// 12ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao//===----------------------------------------------------------------------===// 13ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 14ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#ifndef LLVM_CLANG_SCRATCHBUFFER_H 15ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#define LLVM_CLANG_SCRATCHBUFFER_H 16ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 17ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#include "clang/Basic/SourceLocation.h" 18ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 19ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaonamespace clang { 20ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao class SourceManager; 21ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 22ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao/// ScratchBuffer - This class exposes a simple interface for the dynamic 23ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao/// construction of tokens. This is used for builtin macros (e.g. __LINE__) as 24ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao/// well as token pasting, etc. 25ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaoclass ScratchBuffer { 26ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao SourceManager &SourceMgr; 27ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao char *CurBuffer; 28ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao SourceLocation BufferStartLoc; 29ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao unsigned BytesUsed; 30ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaopublic: 31ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao ScratchBuffer(SourceManager &SM); 32ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 33ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao /// getToken - Splat the specified text into a temporary MemoryBuffer and 34ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao /// return a SourceLocation that refers to the token. This is just like the 35ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao /// previous method, but returns a location that indicates the physloc of the 36ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao /// token. 37ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao SourceLocation getToken(const char *Buf, unsigned Len, const char *&DestPtr); 38ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 39ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liaoprivate: 40ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao void AllocScratchBuffer(unsigned RequestLen); 41ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao}; 42ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 43ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao} // end namespace clang 44ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao 45ea285162342df160e7860e26528bc7110bc6c0cdShih-wei Liao#endif 46