[libclang] Introduce clang_getPresumedLocation which works like clang_getExpansionLocation

but takes into account #line directives coming from preprocessed files.

Patch by Vinay Sajip!

llvm-svn: 139647

3 files changed, 30 insertions, 0 deletions

diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 2f8db5dfcef..51749d7849b 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -2861,6 +2861,34 @@ void clang_getExpansionLocation(CXSourceLocation location,
     *offset = SM.getDecomposedLoc(ExpansionLoc).second;
 }
 
+void clang_getPresumedLocation(CXSourceLocation location,
+                               CXString *filename,
+                               unsigned *line,
+                               unsigned *column) {
+  SourceLocation Loc = SourceLocation::getFromRawEncoding(location.int_data);
+
+  if (!location.ptr_data[0] || Loc.isInvalid()) {
+    if (filename)
+      *filename = createCXString("");
+    if (line)
+      *line = 0;
+    if (column)
+      *column = 0;
+  }
+  else {
+	const SourceManager &SM =
+        *static_cast<const SourceManager*>(location.ptr_data[0]);
+    PresumedLoc PreLoc = SM.getPresumedLoc(Loc);
+
+    if (filename)
+      *filename = createCXString(PreLoc.getFilename());
+    if (line)
+      *line = PreLoc.getLine();
+    if (column)
+      *column = PreLoc.getColumn();
+  }
+}
+
 void clang_getInstantiationLocation(CXSourceLocation location,
                                     CXFile *file,
                                     unsigned *line,
diff --git a/clang/tools/libclang/libclang.darwin.exports b/clang/tools/libclang/libclang.darwin.exports
index a858f624c88..21ef35b4572 100644
--- a/clang/tools/libclang/libclang.darwin.exports
+++ b/clang/tools/libclang/libclang.darwin.exports
@@ -102,6 +102,7 @@ _clang_getNumOverloadedDecls
 _clang_getOverloadedDecl
 _clang_getOverriddenCursors
 _clang_getPointeeType
+_clang_getPresumedLocation
 _clang_getRange
 _clang_getRangeEnd
 _clang_getRangeStart
diff --git a/clang/tools/libclang/libclang.exports b/clang/tools/libclang/libclang.exports
index 85e9f026950..ea7aaf00c89 100644
--- a/clang/tools/libclang/libclang.exports
+++ b/clang/tools/libclang/libclang.exports
@@ -102,6 +102,7 @@ clang_getNumOverloadedDecls
 clang_getOverloadedDecl
 clang_getOverriddenCursors
 clang_getPointeeType
+clang_getPresumedLocation
 clang_getRange
 clang_getRangeEnd
 clang_getRangeStart