split buffer management and diagnostic printing out of the tblgen
lexer into its own TGSourceMgr class.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66873 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/TGSourceMgr.h b/utils/TableGen/TGSourceMgr.h
new file mode 100644
index 0000000..9a61a9b
--- /dev/null
+++ b/utils/TableGen/TGSourceMgr.h
@@ -0,0 +1,88 @@
+//===- TGSourceMgr.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 TGSourceMgr class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef TGSOURCEMGR_H
+#define TGSOURCEMGR_H
+
+#include <vector>
+
+namespace llvm {
+ class MemoryBuffer;
+
+/// FIXME: Make this a struct that is opaque.
+typedef const char *TGLocTy;
+
+/// TGSourceMgr - This owns the files read by tblgen, handles include stacks,
+/// and handles printing of diagnostics.
+class TGSourceMgr {
+ 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.
+ TGLocTy IncludeLoc;
+ };
+
+ /// Buffers - This is all of the buffers that we are reading from.
+ std::vector<SrcBuffer> Buffers;
+
+ TGSourceMgr(const TGSourceMgr&); // DO NOT IMPLEMENT
+ void operator=(const TGSourceMgr&); // DO NOT IMPLEMENT
+public:
+ TGSourceMgr() {}
+ ~TGSourceMgr();
+
+ 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;
+ }
+
+ TGLocTy getParentIncludeLoc(unsigned i) const {
+ assert(i < Buffers.size() && "Invalid Buffer ID!");
+ return Buffers[i].IncludeLoc;
+ }
+
+ unsigned AddNewSourceBuffer(MemoryBuffer *F, TGLocTy IncludeLoc) {
+ SrcBuffer NB;
+ NB.Buffer = F;
+ NB.IncludeLoc = IncludeLoc;
+ Buffers.push_back(NB);
+ return Buffers.size()-1;
+ }
+
+ /// FindBufferContainingLoc - Return the ID of the buffer containing the
+ /// specified location, returning -1 if not found.
+ int FindBufferContainingLoc(TGLocTy Loc) const;
+
+ /// FindLineNumber - Find the line number for the specified location in the
+ /// specified file. This is not a fast method.
+ unsigned FindLineNumber(TGLocTy Loc, int BufferID = -1) const;
+
+
+ /// PrintError - Emit an error message about the specified location with the
+ /// specified string.
+ void PrintError(TGLocTy ErrorLoc, const std::string &Msg) const;
+
+private:
+ void PrintIncludeStack(TGLocTy IncludeLoc) const;
+};
+
+} // end llvm namespace
+
+#endif