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refactor some code to expose column numbers more and make diagnostic printing slightly more efficient.
llvm-svn: 156243
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f7461026c2
commit
4c8c651c04
@ -79,9 +79,10 @@ int SourceMgr::FindBufferContainingLoc(SMLoc Loc) const {
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return -1;
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}
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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 SourceMgr::FindLineNumber(SMLoc Loc, int BufferID) const {
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/// getLineAndColumn - Find the line and column number for the specified
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/// location in the specified file. This is not a fast method.
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std::pair<unsigned, unsigned>
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SourceMgr::getLineAndColumn(SMLoc Loc, int BufferID) const {
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if (BufferID == -1) BufferID = FindBufferContainingLoc(Loc);
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assert(BufferID != -1 && "Invalid Location!");
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@ -91,7 +92,8 @@ unsigned SourceMgr::FindLineNumber(SMLoc Loc, int BufferID) const {
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// location.
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unsigned LineNo = 1;
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const char *Ptr = Buff->getBufferStart();
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const char *BufStart = Buff->getBufferStart();
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const char *Ptr = BufStart;
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// If we have a line number cache, and if the query is to a later point in the
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// same file, start searching from the last query location. This optimizes
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@ -108,7 +110,6 @@ unsigned SourceMgr::FindLineNumber(SMLoc Loc, int BufferID) const {
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for (; SMLoc::getFromPointer(Ptr) != Loc; ++Ptr)
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if (*Ptr == '\n') ++LineNo;
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// Allocate the line number cache if it doesn't exist.
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if (LineNoCache == 0)
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LineNoCache = new LineNoCacheTy();
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@ -118,7 +119,10 @@ unsigned SourceMgr::FindLineNumber(SMLoc Loc, int BufferID) const {
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Cache.LastQueryBufferID = BufferID;
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Cache.LastQuery = Ptr;
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Cache.LineNoOfQuery = LineNo;
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return LineNo;
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size_t NewlineOffs = StringRef(BufStart, Ptr-BufStart).find_last_of("\n\r");
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if (NewlineOffs == StringRef::npos) NewlineOffs = ~0ULL;
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return std::make_pair(LineNo, Ptr-BufStart-NewlineOffs);
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}
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void SourceMgr::PrintIncludeStack(SMLoc IncludeLoc, raw_ostream &OS) const {
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@ -153,14 +157,15 @@ SMDiagnostic SourceMgr::GetMessage(SMLoc Loc, SourceMgr::DiagKind Kind,
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// Scan backward to find the start of the line.
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const char *LineStart = Loc.getPointer();
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while (LineStart != CurMB->getBufferStart() &&
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LineStart[-1] != '\n' && LineStart[-1] != '\r')
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const char *BufStart = CurMB->getBufferStart();
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while (LineStart != BufStart && LineStart[-1] != '\n' &&
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LineStart[-1] != '\r')
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--LineStart;
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// Get the end of the line.
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const char *LineEnd = Loc.getPointer();
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while (LineEnd != CurMB->getBufferEnd() &&
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LineEnd[0] != '\n' && LineEnd[0] != '\r')
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const char *BufEnd = CurMB->getBufferEnd();
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while (LineEnd != BufEnd && LineEnd[0] != '\n' && LineEnd[0] != '\r')
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++LineEnd;
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std::string LineStr(LineStart, LineEnd);
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@ -186,9 +191,10 @@ SMDiagnostic SourceMgr::GetMessage(SMLoc Loc, SourceMgr::DiagKind Kind,
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R.End.getPointer()-LineStart));
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}
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std::pair<unsigned, unsigned> LineAndCol = getLineAndColumn(Loc, CurBuf);
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return SMDiagnostic(*this, Loc,
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CurMB->getBufferIdentifier(), FindLineNumber(Loc, CurBuf),
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Loc.getPointer()-LineStart, Kind, Msg.str(),
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CurMB->getBufferIdentifier(), LineAndCol.first,
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LineAndCol.second, Kind, Msg.str(),
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LineStr, ColRanges);
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}
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