1 files changed, 7 insertions, 4 deletions
diff --git a/src/input-reader.cpp b/src/input-reader.cpp
index 2f10530..f1df3bf 100644
--- a/src/input-reader.cpp
+++ b/src/input-reader.cpp
@@ -13,6 +13,12 @@
 InputReader::InputReader(std::istream * stream, std::size_t block_size_bytes)
     : stream_(stream), block_size_bytes_(block_size_bytes)
 {
+    if (stream == nullptr) {
+        throw std::runtime_error("valid stream is required");
+    }
+    if (block_size_bytes == 0) {
+        throw std::runtime_error("block size in bytes must be positive");
+    }
 }
 
 SyncInputReader::SyncInputReader(std::istream * stream, std::size_t block_size_bytes)
@@ -54,9 +60,6 @@ SyncInputReader::GetBuffer()
 AsyncInputReader::AsyncInputReader(std::istream * stream, std::size_t block_size_bytes)
     : InputReader(stream, block_size_bytes)
 {
-    if (block_size_bytes == 0) {
-        throw std::runtime_error("block size in bytes must be positive");
-    }
     this->buffer_ = new char[block_size_bytes];
     assert(this->buffer_ != nullptr);
     this->bytes_in_buffer_ = 0;
@@ -161,4 +164,4 @@ AsyncInputReader::GetBuffer()
     std::vector<char> wrapper(this->buffer_, this->buffer_ + this->bytes_in_buffer_);
     this->bytes_in_buffer_ = 0;
     return wrapper;
-}
-\ No newline at end of file
+}