intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 22 insertions, 0 deletions

diff --git a/util/stream/tempbuf.cpp b/util/stream/tempbuf.cpp
new file mode 100644
index 00000000000..801a1fabb05
--- /dev/null
+++ b/util/stream/tempbuf.cpp
@@ -0,0 +1,22 @@
+#include "tempbuf.h"
+
+namespace {
+    static inline size_t Next(size_t size) noexcept {
+        return size * 2;
+    }
+}
+
+void TTempBufOutput::DoWrite(const void* data, size_t len) {
+    if (Y_LIKELY(len <= Left())) {
+        Append(data, len);
+    } else {
+        const size_t filled = Filled();
+
+        TTempBuf buf(Next(filled + len));
+
+        buf.Append(Data(), filled);
+        buf.Append(data, len);
+
+        static_cast<TTempBuf&>(*this) = buf;
+    }
+}