1 //===- SourceMgr.h - Manager for Source Buffers & Diagnostics ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file declares the SMDiagnostic and SourceMgr classes. This
11 // provides a simple substrate for diagnostics, #include handling, and other low
12 // level things for simple parsers.
14 //===----------------------------------------------------------------------===//
16 #ifndef SUPPORT_SOURCEMGR_H
17 #define SUPPORT_SOURCEMGR_H
19 #include "llvm/Support/SMLoc.h"
20 #include "llvm/ADT/ArrayRef.h"
30 /// SourceMgr - This owns the files read by a parser, handles include stacks,
31 /// and handles diagnostic wrangling.
40 /// DiagHandlerTy - Clients that want to handle their own diagnostics in a
41 /// custom way can register a function pointer+context as a diagnostic
42 /// handler. It gets called each time PrintMessage is invoked.
43 typedef void (*DiagHandlerTy)(const SMDiagnostic &, void *Context);
46 /// Buffer - The memory buffer for the file.
49 /// IncludeLoc - This is the location of the parent include, or null if at
54 /// Buffers - This is all of the buffers that we are reading from.
55 std::vector<SrcBuffer> Buffers;
57 // IncludeDirectories - This is the list of directories we should search for
59 std::vector<std::string> IncludeDirectories;
61 /// LineNoCache - This is a cache for line number queries, its implementation
62 /// is really private to SourceMgr.cpp.
63 mutable void *LineNoCache;
65 DiagHandlerTy DiagHandler;
68 SourceMgr(const SourceMgr&); // DO NOT IMPLEMENT
69 void operator=(const SourceMgr&); // DO NOT IMPLEMENT
71 SourceMgr() : LineNoCache(0), DiagHandler(0), DiagContext(0) {}
74 void setIncludeDirs(const std::vector<std::string> &Dirs) {
75 IncludeDirectories = Dirs;
78 /// setDiagHandler - Specify a diagnostic handler to be invoked every time
79 /// PrintMessage is called. Ctx is passed into the handler when it is invoked.
80 void setDiagHandler(DiagHandlerTy DH, void *Ctx = 0) {
85 const SrcBuffer &getBufferInfo(unsigned i) const {
86 assert(i < Buffers.size() && "Invalid Buffer ID!");
90 const MemoryBuffer *getMemoryBuffer(unsigned i) const {
91 assert(i < Buffers.size() && "Invalid Buffer ID!");
92 return Buffers[i].Buffer;
95 SMLoc getParentIncludeLoc(unsigned i) const {
96 assert(i < Buffers.size() && "Invalid Buffer ID!");
97 return Buffers[i].IncludeLoc;
100 /// AddNewSourceBuffer - Add a new source buffer to this source manager. This
101 /// takes ownership of the memory buffer.
102 unsigned AddNewSourceBuffer(MemoryBuffer *F, SMLoc IncludeLoc) {
105 NB.IncludeLoc = IncludeLoc;
106 Buffers.push_back(NB);
107 return Buffers.size()-1;
110 /// AddIncludeFile - Search for a file with the specified name in the current
111 /// directory or in one of the IncludeDirs. If no file is found, this returns
112 /// ~0, otherwise it returns the buffer ID of the stacked file.
113 /// The full path to the included file can be found in IncludedFile.
114 unsigned AddIncludeFile(const std::string &Filename, SMLoc IncludeLoc,
115 std::string &IncludedFile);
117 /// FindBufferContainingLoc - Return the ID of the buffer containing the
118 /// specified location, returning -1 if not found.
119 int FindBufferContainingLoc(SMLoc Loc) const;
121 /// FindLineNumber - Find the line number for the specified location in the
122 /// specified file. This is not a fast method.
123 unsigned FindLineNumber(SMLoc Loc, int BufferID = -1) const;
125 /// PrintMessage - Emit a message about the specified location with the
126 /// specified string.
128 void PrintMessage(SMLoc Loc, DiagKind Kind, const Twine &Msg,
129 ArrayRef<SMRange> Ranges = ArrayRef<SMRange>(),
130 bool ShowLine = true) const;
133 /// GetMessage - Return an SMDiagnostic at the specified location with the
134 /// specified string.
136 /// @param Type - If non-null, the kind of message (e.g., "error") which is
137 /// prefixed to the message.
138 /// @param ShowLine - Should the diagnostic show the source line.
139 SMDiagnostic GetMessage(SMLoc Loc, DiagKind Kind, const Twine &Msg,
140 ArrayRef<SMRange> Ranges = ArrayRef<SMRange>(),
141 bool ShowLine = true) const;
143 /// PrintIncludeStack - Prints the names of included files and the line of the
144 /// file they were included from. A diagnostic handler can use this before
145 /// printing its custom formatted message.
147 /// @param IncludeLoc - The line of the include.
148 /// @param OS the raw_ostream to print on.
149 void PrintIncludeStack(SMLoc IncludeLoc, raw_ostream &OS) const;
153 /// SMDiagnostic - Instances of this class encapsulate one diagnostic report,
154 /// allowing printing to a raw_ostream as a caret diagnostic.
158 std::string Filename;
159 int LineNo, ColumnNo;
160 SourceMgr::DiagKind Kind;
161 std::string Message, LineContents;
162 unsigned ShowLine : 1;
163 std::vector<std::pair<unsigned, unsigned> > Ranges;
168 : SM(0), LineNo(0), ColumnNo(0), Kind(SourceMgr::DK_Error), ShowLine(0) {}
169 // Diagnostic with no location (e.g. file not found, command line arg error).
170 SMDiagnostic(const std::string &filename, SourceMgr::DiagKind Kind,
171 const std::string &Msg)
172 : SM(0), Filename(filename), LineNo(-1), ColumnNo(-1), Kind(Kind),
173 Message(Msg), ShowLine(false) {}
175 // Diagnostic with a location.
176 SMDiagnostic(const SourceMgr &sm, SMLoc L, const std::string &FN,
177 int Line, int Col, SourceMgr::DiagKind Kind,
178 const std::string &Msg, const std::string &LineStr,
179 ArrayRef<std::pair<unsigned,unsigned> > Ranges, bool showline);
181 const SourceMgr *getSourceMgr() const { return SM; }
182 SMLoc getLoc() const { return Loc; }
183 const std::string &getFilename() const { return Filename; }
184 int getLineNo() const { return LineNo; }
185 int getColumnNo() const { return ColumnNo; }
186 SourceMgr::DiagKind getKind() const { return Kind; }
187 const std::string &getMessage() const { return Message; }
188 const std::string &getLineContents() const { return LineContents; }
189 bool getShowLine() const { return ShowLine; }
190 const std::vector<std::pair<unsigned, unsigned> > &getRanges() const {
193 void print(const char *ProgName, raw_ostream &S) const;
196 } // end llvm namespace