forked from OSchip/llvm-project
132 lines
4.4 KiB
C++
132 lines
4.4 KiB
C++
//===- SourceMgr.cpp - Manager for Simple Source Buffers & Diagnostics ----===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the SourceMgr class. This class is used as a simple
|
|
// substrate for diagnostics, #include handling, and other low level things for
|
|
// simple parsers.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Support/SourceMgr.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace llvm;
|
|
|
|
SourceMgr::~SourceMgr() {
|
|
while (!Buffers.empty()) {
|
|
delete Buffers.back().Buffer;
|
|
Buffers.pop_back();
|
|
}
|
|
}
|
|
|
|
/// 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 SourceMgr::AddIncludeFile(const std::string &Filename,
|
|
SMLoc IncludeLoc) {
|
|
|
|
MemoryBuffer *NewBuf = MemoryBuffer::getFile(Filename.c_str());
|
|
|
|
// If the file didn't exist directly, see if it's in an include path.
|
|
for (unsigned i = 0, e = IncludeDirectories.size(); i != e && !NewBuf; ++i) {
|
|
std::string IncFile = IncludeDirectories[i] + "/" + Filename;
|
|
NewBuf = MemoryBuffer::getFile(IncFile.c_str());
|
|
}
|
|
|
|
if (NewBuf == 0) return ~0U;
|
|
|
|
return AddNewSourceBuffer(NewBuf, IncludeLoc);
|
|
}
|
|
|
|
|
|
/// FindBufferContainingLoc - Return the ID of the buffer containing the
|
|
/// specified location, returning -1 if not found.
|
|
int SourceMgr::FindBufferContainingLoc(SMLoc Loc) const {
|
|
for (unsigned i = 0, e = Buffers.size(); i != e; ++i)
|
|
if (Loc.getPointer() >= Buffers[i].Buffer->getBufferStart() &&
|
|
// Use <= here so that a pointer to the null at the end of the buffer
|
|
// is included as part of the buffer.
|
|
Loc.getPointer() <= Buffers[i].Buffer->getBufferEnd())
|
|
return i;
|
|
return -1;
|
|
}
|
|
|
|
/// FindLineNumber - Find the line number for the specified location in the
|
|
/// specified file. This is not a fast method.
|
|
unsigned SourceMgr::FindLineNumber(SMLoc Loc, int BufferID) const {
|
|
if (BufferID == -1) BufferID = FindBufferContainingLoc(Loc);
|
|
assert(BufferID != -1 && "Invalid Location!");
|
|
|
|
MemoryBuffer *Buff = getBufferInfo(BufferID).Buffer;
|
|
|
|
// Count the number of \n's between the start of the file and the specified
|
|
// location.
|
|
unsigned LineNo = 1;
|
|
|
|
const char *Ptr = Buff->getBufferStart();
|
|
|
|
for (; SMLoc::getFromPointer(Ptr) != Loc; ++Ptr)
|
|
if (*Ptr == '\n') ++LineNo;
|
|
return LineNo;
|
|
}
|
|
|
|
void SourceMgr::PrintIncludeStack(SMLoc IncludeLoc) const {
|
|
if (IncludeLoc == SMLoc()) return; // Top of stack.
|
|
|
|
int CurBuf = FindBufferContainingLoc(IncludeLoc);
|
|
assert(CurBuf != -1 && "Invalid or unspecified location!");
|
|
|
|
PrintIncludeStack(getBufferInfo(CurBuf).IncludeLoc);
|
|
|
|
errs() << "Included from "
|
|
<< getBufferInfo(CurBuf).Buffer->getBufferIdentifier()
|
|
<< ":" << FindLineNumber(IncludeLoc, CurBuf) << ":\n";
|
|
}
|
|
|
|
|
|
void SourceMgr::PrintMessage(SMLoc Loc, const std::string &Msg,
|
|
const char *Type) const {
|
|
raw_ostream &OS = errs();
|
|
|
|
// First thing to do: find the current buffer containing the specified
|
|
// location.
|
|
int CurBuf = FindBufferContainingLoc(Loc);
|
|
assert(CurBuf != -1 && "Invalid or unspecified location!");
|
|
|
|
PrintIncludeStack(getBufferInfo(CurBuf).IncludeLoc);
|
|
|
|
MemoryBuffer *CurMB = getBufferInfo(CurBuf).Buffer;
|
|
|
|
|
|
OS << CurMB->getBufferIdentifier() << ":"
|
|
<< FindLineNumber(Loc, CurBuf) << ": ";
|
|
|
|
if (Type)
|
|
OS << Type << ": ";
|
|
|
|
OS << Msg << "\n";
|
|
|
|
// Scan backward to find the start of the line.
|
|
const char *LineStart = Loc.getPointer();
|
|
while (LineStart != CurMB->getBufferStart() &&
|
|
LineStart[-1] != '\n' && LineStart[-1] != '\r')
|
|
--LineStart;
|
|
// Get the end of the line.
|
|
const char *LineEnd = Loc.getPointer();
|
|
while (LineEnd != CurMB->getBufferEnd() &&
|
|
LineEnd[0] != '\n' && LineEnd[0] != '\r')
|
|
++LineEnd;
|
|
// Print out the line.
|
|
OS << std::string(LineStart, LineEnd) << "\n";
|
|
// Print out spaces before the caret.
|
|
for (const char *Pos = LineStart; Pos != Loc.getPointer(); ++Pos)
|
|
OS << (*Pos == '\t' ? '\t' : ' ');
|
|
OS << "^\n";
|
|
}
|