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-rw-r--r--external_libs/yaml-cpp/src/nodebuilder.cpp145
1 files changed, 145 insertions, 0 deletions
diff --git a/external_libs/yaml-cpp/src/nodebuilder.cpp b/external_libs/yaml-cpp/src/nodebuilder.cpp
new file mode 100644
index 00000000..13a70326
--- /dev/null
+++ b/external_libs/yaml-cpp/src/nodebuilder.cpp
@@ -0,0 +1,145 @@
+#include "nodebuilder.h"
+#include "yaml-cpp/mark.h"
+#include "yaml-cpp/node.h"
+#include <cassert>
+
+namespace YAML
+{
+ NodeBuilder::NodeBuilder(Node& root): m_root(root), m_initializedRoot(false), m_finished(false)
+ {
+ m_root.Clear();
+ m_anchors.push_back(0); // since the anchors start at 1
+ }
+
+ NodeBuilder::~NodeBuilder()
+ {
+ }
+
+ void NodeBuilder::OnDocumentStart(const Mark&)
+ {
+ }
+
+ void NodeBuilder::OnDocumentEnd()
+ {
+ assert(m_finished);
+ }
+
+ void NodeBuilder::OnNull(const Mark& mark, anchor_t anchor)
+ {
+ Node& node = Push(anchor);
+ node.Init(NodeType::Null, mark, "");
+ Pop();
+ }
+
+ void NodeBuilder::OnAlias(const Mark& /*mark*/, anchor_t anchor)
+ {
+ Node& node = *m_anchors[anchor];
+ Insert(node);
+ node.MarkAsAliased();
+ }
+
+ void NodeBuilder::OnScalar(const Mark& mark, const std::string& tag, anchor_t anchor, const std::string& value)
+ {
+ Node& node = Push(anchor);
+ node.Init(NodeType::Scalar, mark, tag);
+ node.SetScalarData(value);
+ Pop();
+ }
+
+ void NodeBuilder::OnSequenceStart(const Mark& mark, const std::string& tag, anchor_t anchor)
+ {
+ Node& node = Push(anchor);
+ node.Init(NodeType::Sequence, mark, tag);
+ }
+
+ void NodeBuilder::OnSequenceEnd()
+ {
+ Pop();
+ }
+
+ void NodeBuilder::OnMapStart(const Mark& mark, const std::string& tag, anchor_t anchor)
+ {
+ Node& node = Push(anchor);
+ node.Init(NodeType::Map, mark, tag);
+ m_didPushKey.push(false);
+ }
+
+ void NodeBuilder::OnMapEnd()
+ {
+ m_didPushKey.pop();
+ Pop();
+ }
+
+ Node& NodeBuilder::Push(anchor_t anchor)
+ {
+ Node& node = Push();
+ RegisterAnchor(anchor, node);
+ return node;
+ }
+
+ Node& NodeBuilder::Push()
+ {
+ if(!m_initializedRoot) {
+ m_initializedRoot = true;
+ return m_root;
+ }
+
+ Node& node = m_root.CreateNode();
+ m_stack.push(&node);
+ return node;
+ }
+
+ Node& NodeBuilder::Top()
+ {
+ return m_stack.empty() ? m_root : *m_stack.top();
+ }
+
+ void NodeBuilder::Pop()
+ {
+ assert(!m_finished);
+ if(m_stack.empty()) {
+ m_finished = true;
+ return;
+ }
+
+ Node& node = *m_stack.top();
+ m_stack.pop();
+ Insert(node);
+ }
+
+ void NodeBuilder::Insert(Node& node)
+ {
+ Node& curTop = Top();
+ switch(curTop.Type()) {
+ case NodeType::Null:
+ case NodeType::Scalar:
+ assert(false);
+ break;
+ case NodeType::Sequence:
+ curTop.Append(node);
+ break;
+ case NodeType::Map:
+ assert(!m_didPushKey.empty());
+ if(m_didPushKey.top()) {
+ assert(!m_pendingKeys.empty());
+
+ Node& key = *m_pendingKeys.top();
+ m_pendingKeys.pop();
+ curTop.Insert(key, node);
+ m_didPushKey.top() = false;
+ } else {
+ m_pendingKeys.push(&node);
+ m_didPushKey.top() = true;
+ }
+ break;
+ }
+ }
+
+ void NodeBuilder::RegisterAnchor(anchor_t anchor, Node& node)
+ {
+ if(anchor) {
+ assert(anchor == m_anchors.size());
+ m_anchors.push_back(&node);
+ }
+ }
+}