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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100542 91177308-0d34-0410-b5e6-96231b3b80d8
190 lines
6.5 KiB
C++
190 lines
6.5 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 SMDiagnostic and SourceMgr classes. This
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// provides a simple substrate for diagnostics, #include handling, and other low
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// level things for 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 "llvm/Support/SMLoc.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 SMDiagnostic;
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class raw_ostream;
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/// SourceMgr - This owns the files read by a parser, handles include stacks,
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/// and handles diagnostic wrangling.
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class SourceMgr {
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public:
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/// DiagHandlerTy - Clients that want to handle their own diagnostics in a
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/// custom way can register a function pointer+context as a diagnostic
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/// handler. It gets called each time PrintMessage is invoked.
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typedef void (*DiagHandlerTy)(const SMDiagnostic&, void *Context,
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unsigned LocCookie);
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private:
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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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/// LineNoCache - This is a cache for line number queries, its implementation
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/// is really private to SourceMgr.cpp.
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mutable void *LineNoCache;
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DiagHandlerTy DiagHandler;
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void *DiagContext;
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unsigned DiagLocCookie;
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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() : LineNoCache(0), DiagHandler(0), DiagContext(0) {}
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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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/// setDiagHandler - Specify a diagnostic handler to be invoked every time
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/// PrintMessage is called. Ctx and Cookie are passed into the handler when
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/// it is invoked.
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void setDiagHandler(DiagHandlerTy DH, void *Ctx = 0, unsigned Cookie = 0) {
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DiagHandler = DH;
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DiagContext = Ctx;
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DiagLocCookie = Cookie;
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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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/// AddNewSourceBuffer - Add a new source buffer to this source manager. This
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/// takes ownership of the memory buffer.
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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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///
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/// @param Type - If non-null, the kind of message (e.g., "error") which is
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/// prefixed to the message.
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/// @param ShowLine - Should the diagnostic show the source line.
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void PrintMessage(SMLoc Loc, const std::string &Msg, const char *Type,
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bool ShowLine = true) const;
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/// GetMessage - Return an SMDiagnostic at the specified location with the
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/// specified string.
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///
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/// @param Type - If non-null, the kind of message (e.g., "error") which is
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/// prefixed to the message.
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/// @param ShowLine - Should the diagnostic show the source line.
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SMDiagnostic GetMessage(SMLoc Loc,
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const std::string &Msg, const char *Type,
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bool ShowLine = true) const;
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private:
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void PrintIncludeStack(SMLoc IncludeLoc, raw_ostream &OS) const;
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};
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/// SMDiagnostic - Instances of this class encapsulate one diagnostic report,
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/// allowing printing to a raw_ostream as a caret diagnostic.
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class SMDiagnostic {
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const SourceMgr *SM;
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SMLoc Loc;
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std::string Filename;
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int LineNo, ColumnNo;
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std::string Message, LineContents;
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unsigned ShowLine : 1;
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public:
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// Null diagnostic.
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SMDiagnostic() : SM(0), LineNo(0), ColumnNo(0), ShowLine(0) {}
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// Diagnostic with no location (e.g. file not found, command line arg error).
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SMDiagnostic(const std::string &filename, const std::string &Msg,
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bool showline = true)
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: SM(0), Loc(), Filename(filename), LineNo(-1), ColumnNo(-1),
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Message(Msg), LineContents(""), ShowLine(showline) {}
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// Diagnostic with a location.
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SMDiagnostic(const SourceMgr &sm, SMLoc L, const std::string &FN,
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int Line, int Col,
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const std::string &Msg, const std::string &LineStr,
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bool showline = true)
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: SM(&sm), Loc(L), Filename(FN), LineNo(Line), ColumnNo(Col), Message(Msg),
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LineContents(LineStr), ShowLine(showline) {}
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const SourceMgr *getSourceMgr() const { return SM; }
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SMLoc getLoc() const { return Loc; }
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const std::string &getFilename() { return Filename; }
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int getLineNo() const { return LineNo; }
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int getColumnNo() const { return ColumnNo; }
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const std::string &getMessage() const { return Message; }
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const std::string &getLineContents() const { return LineContents; }
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bool getShowLine() const { return ShowLine; }
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void Print(const char *ProgName, raw_ostream &S) const;
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};
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} // end llvm namespace
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#endif
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