cmState: Add Snapshot method to get bottom of call stack

The bottom of the call stack is always a long-lived snapshot and can be
saved for later use with cmOutputConverter.

1 files changed, 15 insertions, 0 deletions

diff --git a/Source/cmState.cxx b/Source/cmState.cxx
index be8e418..c48f9b1 100644
--- a/Source/cmState.cxx
+++ b/Source/cmState.cxx
@@ -1213,6 +1213,21 @@ cmState::Snapshot cmState::Snapshot::GetCallStackParent() const
   return snapshot;
 }
 
+cmState::Snapshot cmState::Snapshot::GetCallStackBottom() const
+{
+  assert(this->State);
+  assert(this->Position != this->State->SnapshotData.Root());
+
+  PositionType pos = this->Position;
+  while (pos->SnapshotType != cmState::BaseType &&
+         pos->SnapshotType != cmState::BuildsystemDirectoryType &&
+         pos != this->State->SnapshotData.Root())
+    {
+    ++pos;
+    }
+  return Snapshot(this->State, pos);
+}
+
 void cmState::Snapshot::PushPolicy(cmPolicies::PolicyMap entry, bool weak)
 {
   PositionType pos = this->Position;