WORKING: make Buffer track two sides.

1 files changed, 45 insertions, 0 deletions

diff --git a/src/common/io/BufferStream.cpp b/src/common/io/BufferStream.cpp
new file mode 100644
index 00000000..d4780f7a
--- /dev/null
+++ b/src/common/io/BufferStream.cpp
@@ -0,0 +1,45 @@
+#include "cru/common/io/BufferStream.h"
+#include <memory>
+#include "cru/common/io/Stream.h"
+
+namespace cru::io {
+BufferStream::BufferStream(const BufferStreamOptions& options) {
+  block_size_ =
+      options.block_size <= 0 ? kDefaultBlockSize : options.block_size;
+  total_size_limit_ = options.total_size_limit < 0 ? kDefaultTotalSizeLimit
+                                                   : options.total_size_limit;
+  block_count_limit_ = total_size_limit_ / block_size_;
+
+  eof_ = false;
+}
+
+bool BufferStream::CanSeek() {
+  CheckClosed();
+  return false;
+}
+
+Index BufferStream::Seek(Index offset, SeekOrigin origin) {
+  CheckClosed();
+  throw StreamOperationNotSupportedException(
+      u"BufferStream does not support seeking.");
+}
+
+bool BufferStream::CanRead() {
+  CheckClosed();
+  return true; }
+
+Index BufferStream::Read(std::byte* buffer, Index offset, Index size) {
+  std::unique_lock lock(mutex_);
+
+  Index written_size = 0;
+
+  if (eof_ && buffer_list_.empty()) {
+    return 0;
+  }
+
+  while (!buffer_list_.empty()) {
+    
+  }
+}
+
+}  // namespace cru::io