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