Add clang_getLocationForOffset() to libclang, for gives a source location from a character index into a file.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@116587 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang-c/Index.h b/include/clang-c/Index.h
index bf99568..40d3baf 100644
--- a/include/clang-c/Index.h
+++ b/include/clang-c/Index.h
@@ -301,6 +301,13 @@
CXFile file,
unsigned line,
unsigned column);
+/**
+ * \brief Retrieves the source location associated with a given character offset
+ * in a particular translation unit.
+ */
+CINDEX_LINKAGE CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu,
+ CXFile file,
+ unsigned offset);
/**
* \brief Retrieve a NULL (invalid) source range.
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 1d7efe4..722e2cb 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -2266,6 +2266,27 @@
= CXXUnit->getSourceManager().getLocation(
static_cast<const FileEntry *>(file),
line, column);
+ if (SLoc.isInvalid()) return clang_getNullLocation();
+
+ return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
+}
+
+CXSourceLocation clang_getLocationForOffset(CXTranslationUnit tu,
+ CXFile file,
+ unsigned offset) {
+ if (!tu || !file)
+ return clang_getNullLocation();
+
+ ASTUnit *CXXUnit = static_cast<ASTUnit *>(tu);
+ SourceLocation Start
+ = CXXUnit->getSourceManager().getLocation(
+ static_cast<const FileEntry *>(file),
+ 1, 1);
+ if (Start.isInvalid()) return clang_getNullLocation();
+
+ SourceLocation SLoc = Start.getFileLocWithOffset(offset);
+
+ if (SLoc.isInvalid()) return clang_getNullLocation();
return cxloc::translateSourceLocation(CXXUnit->getASTContext(), SLoc);
}
diff --git a/tools/libclang/libclang.darwin.exports b/tools/libclang/libclang.darwin.exports
index c63ee4d..dbb335f 100644
--- a/tools/libclang/libclang.darwin.exports
+++ b/tools/libclang/libclang.darwin.exports
@@ -71,6 +71,7 @@
_clang_getInclusions
_clang_getInstantiationLocation
_clang_getLocation
+_clang_getLocationForOffset
_clang_getNullCursor
_clang_getNullLocation
_clang_getNullRange
diff --git a/tools/libclang/libclang.exports b/tools/libclang/libclang.exports
index 2af9a34..06e5a8b 100644
--- a/tools/libclang/libclang.exports
+++ b/tools/libclang/libclang.exports
@@ -71,6 +71,7 @@
clang_getInclusions
clang_getInstantiationLocation
clang_getLocation
+clang_getLocationForOffset
clang_getNullCursor
clang_getNullLocation
clang_getNullRange