1 files changed, 86 insertions, 0 deletions
diff --git a/TAO/orbsvcs/orbsvcs/PortableGroup/UIPMC_Message_Block_Data_Iterator.cpp b/TAO/orbsvcs/orbsvcs/PortableGroup/UIPMC_Message_Block_Data_Iterator.cpp
new file mode 100644
index 00000000000..bf301d061fe
--- /dev/null
+++ b/TAO/orbsvcs/orbsvcs/PortableGroup/UIPMC_Message_Block_Data_Iterator.cpp
@@ -0,0 +1,86 @@
+// $Id$
+
+#include "UIPMC_Message_Block_Data_Iterator.h"
+
+UIPMC_Message_Block_Data_Iterator::UIPMC_Message_Block_Data_Iterator (iovec *iov, int iovcnt) :
+  iov_ (iov),
+  iovcnt_ (iovcnt),
+  iov_ptr_ (0),
+  iov_index_ (0),
+  iov_len_left_ (0),
+  state_ (INTER_BLOCK)
+{
+}
+
+size_t
+UIPMC_Message_Block_Data_Iterator::next_block (size_t max_length,
+                                               iovec &block)
+{
+  if (this->state_ == INTER_BLOCK)
+    {
+      // Check that there are some iovec buffers left.
+      if (this->iov_index_ >= this->iovcnt_)
+        return 0;
+
+
+      size_t current_iov_len =
+                    this->iov_[this->iov_index_].iov_len;
+
+      if (current_iov_len <= max_length)
+        {
+          // Return the full data portion.
+          block.iov_len = ACE_static_cast (u_long, current_iov_len);
+          block.iov_base = this->iov_[this->iov_index_].iov_base;
+
+          // Go to the next block.
+          this->iov_index_++;
+
+          return current_iov_len;
+        }
+      else
+        {
+          // Let the caller use the first part of this
+          // message block.
+          block.iov_len = ACE_static_cast (u_long, max_length);
+          block.iov_base = this->iov_[this->iov_index_].iov_base;
+
+          // Break up the block.
+          this->iov_len_left_ = current_iov_len - max_length;
+          this->iov_ptr_ =
+            ACE_reinterpret_cast (char *,
+                                  ACE_reinterpret_cast (char *, block.iov_base)
+                                  + max_length);
+          this->state_ = INTRA_BLOCK;
+
+          return max_length;
+        }
+    }
+  else
+    {
+      // Currently scanning a split block.
+      if (this->iov_len_left_ <= max_length)
+        {
+          // Return everything that's left in the block.
+          block.iov_len = ACE_static_cast (u_long, this->iov_len_left_);
+          block.iov_base = this->iov_ptr_;
+
+          // Go to the next block.
+          this->iov_index_++;
+
+          // Update the state.
+          this->state_ = INTER_BLOCK;
+
+          return this->iov_len_left_;
+        }
+      else
+        {
+          // Split a little more off the block.
+          block.iov_len = ACE_static_cast (u_long, this->iov_len_left_);
+          block.iov_base = this->iov_ptr_;
+
+          this->iov_len_left_ -= max_length;
+          this->iov_ptr_ += max_length;
+          return max_length;
+        }
+    }
+}