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121 lines
3.5 KiB
C++
121 lines
3.5 KiB
C++
//===- SourceMgr.h - Manager for Source Buffers & Diagnostics ---*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the SourceMgr class. This class is used as a simple
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// substrate for diagnostics, #include handling, and other low level things for
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// simple parsers.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SUPPORT_SOURCEMGR_H
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#define SUPPORT_SOURCEMGR_H
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#include <string>
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#include <vector>
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#include <cassert>
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namespace llvm {
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class MemoryBuffer;
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class SourceMgr;
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class SMLoc {
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const char *Ptr;
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public:
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SMLoc() : Ptr(0) {}
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SMLoc(const SMLoc &RHS) : Ptr(RHS.Ptr) {}
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bool operator==(const SMLoc &RHS) const { return RHS.Ptr == Ptr; }
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bool operator!=(const SMLoc &RHS) const { return RHS.Ptr != Ptr; }
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const char *getPointer() const { return Ptr; }
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static SMLoc getFromPointer(const char *Ptr) {
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SMLoc L;
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L.Ptr = Ptr;
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return L;
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}
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};
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/// SourceMgr - This owns the files read by tblgen, handles include stacks,
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/// and handles printing of diagnostics.
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class SourceMgr {
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struct SrcBuffer {
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/// Buffer - The memory buffer for the file.
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MemoryBuffer *Buffer;
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/// IncludeLoc - This is the location of the parent include, or null if at
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/// the top level.
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SMLoc IncludeLoc;
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};
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/// Buffers - This is all of the buffers that we are reading from.
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std::vector<SrcBuffer> Buffers;
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// IncludeDirectories - This is the list of directories we should search for
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// include files in.
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std::vector<std::string> IncludeDirectories;
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SourceMgr(const SourceMgr&); // DO NOT IMPLEMENT
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void operator=(const SourceMgr&); // DO NOT IMPLEMENT
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public:
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SourceMgr() {}
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~SourceMgr();
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void setIncludeDirs(const std::vector<std::string> &Dirs) {
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IncludeDirectories = Dirs;
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}
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const SrcBuffer &getBufferInfo(unsigned i) const {
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assert(i < Buffers.size() && "Invalid Buffer ID!");
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return Buffers[i];
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}
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const MemoryBuffer *getMemoryBuffer(unsigned i) const {
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assert(i < Buffers.size() && "Invalid Buffer ID!");
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return Buffers[i].Buffer;
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}
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SMLoc getParentIncludeLoc(unsigned i) const {
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assert(i < Buffers.size() && "Invalid Buffer ID!");
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return Buffers[i].IncludeLoc;
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}
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unsigned AddNewSourceBuffer(MemoryBuffer *F, SMLoc IncludeLoc) {
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SrcBuffer NB;
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NB.Buffer = F;
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NB.IncludeLoc = IncludeLoc;
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Buffers.push_back(NB);
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return Buffers.size()-1;
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}
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/// AddIncludeFile - Search for a file with the specified name in the current
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/// directory or in one of the IncludeDirs. If no file is found, this returns
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/// ~0, otherwise it returns the buffer ID of the stacked file.
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unsigned AddIncludeFile(const std::string &Filename, SMLoc IncludeLoc);
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/// FindBufferContainingLoc - Return the ID of the buffer containing the
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/// specified location, returning -1 if not found.
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int FindBufferContainingLoc(SMLoc Loc) const;
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/// FindLineNumber - Find the line number for the specified location in the
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/// specified file. This is not a fast method.
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unsigned FindLineNumber(SMLoc Loc, int BufferID = -1) const;
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/// PrintMessage - Emit a message about the specified location with the
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/// specified string.
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void PrintMessage(SMLoc Loc, const std::string &Msg) const;
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private:
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void PrintIncludeStack(SMLoc IncludeLoc) const;
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};
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} // end llvm namespace
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#endif
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