Add raw_stream adaptors that write into an std::string and SmallVector/SmallString.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55265 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 35 insertions, 0 deletions

diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 9827ca776a..b9beac2869 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -268,3 +268,38 @@ void raw_os_ostream::flush_impl() {
     OS.write(OutBufStart, OutBufCur-OutBufStart);
   HandleFlush();
 }
+
+//===----------------------------------------------------------------------===//
+//  raw_string_ostream
+//===----------------------------------------------------------------------===//
+
+raw_string_ostream::~raw_string_ostream() {
+  flush();
+}
+
+/// flush_impl - The is the piece of the class that is implemented by
+/// subclasses.  This outputs the currently buffered data and resets the
+/// buffer to empty.
+void raw_string_ostream::flush_impl() {
+  if (OutBufCur-OutBufStart)
+    OS.append(OutBufStart, OutBufCur-OutBufStart);
+  HandleFlush();
+}
+
+//===----------------------------------------------------------------------===//
+//  raw_svector_ostream
+//===----------------------------------------------------------------------===//
+
+raw_svector_ostream::~raw_svector_ostream() {
+  flush();
+}
+
+/// flush_impl - The is the piece of the class that is implemented by
+/// subclasses.  This outputs the currently buffered data and resets the
+/// buffer to empty.
+void raw_svector_ostream::flush_impl() {
+  if (OutBufCur-OutBufStart)
+    OS.append(OutBufStart, OutBufCur);
+  HandleFlush();
+}
+