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Move decompose from PrettyStackTrace.cpp to the SourceManager

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It requires direct access to the SourceLoc internals and is generally useful
anyway.


Swift SVN r7111
This commit is contained in:
Dmitri Hrybenko
2013-08-09 22:50:58 +00:00
parent dc655eb1cb
commit aacef757ed
3 changed files with 35 additions and 22 deletions
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21
lib/Basic/SourceLoc.cpp
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@@ -36,6 +36,27 @@ unsigned SourceManager::getLocOffsetInBuffer(SourceLoc Loc,
return Loc.Value.getPointer() - Buffer->getBuffer().begin();
}
DecomposedLoc SourceManager::decompose(SourceLoc Loc) const {
assert(Loc.isValid());
unsigned BufferID =
unsigned(LLVMSourceMgr.FindBufferContainingLoc(Loc.Value));
assert(BufferID != ~0U);
DecomposedLoc Result;
Result.Buffer = LLVMSourceMgr.getMemoryBuffer(BufferID);
Result.Line = LLVMSourceMgr.FindLineNumber(Loc.Value, BufferID);
const char *BufferStart = Result.Buffer->getBufferStart();
const char *LineStart = Loc.Value.getPointer();
while (LineStart != BufferStart &&
LineStart[-1] != '\n' && LineStart[-1] != '\r')
--LineStart;
Result.Column = Loc.Value.getPointer() - LineStart;
return Result;
}
void SourceLoc::printLineAndColon(raw_ostream &OS,
const SourceManager &SM) const {
int BufferIndex = SM->FindBufferContainingLoc(Value);