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reapply my patch, with a fix for an off-by-one error. Turned out to be a lot

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of work for a drive-by fix :)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156246 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2012-05-05 22:17:32 +00:00
parent c18e6d9375
commit 77eafd940a
2 changed files with 26 additions and 13 deletions
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9
include/llvm/Support/SourceMgr.h
View File

@ -123,7 +123,14 @@ public:
/// 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;
unsigned FindLineNumber(SMLoc Loc, int BufferID = -1) const {
return getLineAndColumn(Loc, BufferID).first;
}
/// getLineAndColumn - Find the line and column number for the specified
/// location in the specified file. This is not a fast method.
std::pair<unsigned, unsigned>
getLineAndColumn(SMLoc Loc, int BufferID = -1) const;
/// PrintMessage - Emit a message about the specified location with the
/// specified string.

30
lib/Support/SourceMgr.cpp
View File

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