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#include <set>
struct Node;
struct GraphViz {
void Start();
void AddTarget(Node* node);
void Finish();
set<Node*> visited_;
};
void GraphViz::AddTarget(Node* node) {
if (visited_.find(node) != visited_.end())
return;
printf("\"%p\" [label=\"%s\"]\n", node, node->file_->path_.c_str());
visited_.insert(node);
if (!node->in_edge_) {
// Leaf node.
// Draw as a rect?
return;
}
Edge* edge = node->in_edge_;
if (edge->inputs_.size() == 1 && edge->outputs_.size() == 1) {
// Can draw simply.
// Note extra space before label text -- this is cosmetic and feels
// like a graphviz bug.
printf("\"%p\" -> \"%p\" [label=\" %s\"]\n",
edge->inputs_[0], edge->outputs_[0], edge->rule_->name_.c_str());
} else {
printf("\"%p\" [label=\"%s\", shape=ellipse]\n",
edge, edge->rule_->name_.c_str());
for (vector<Node*>::iterator out = edge->outputs_.begin();
out != edge->outputs_.end(); ++out) {
printf("\"%p\" -> \"%p\"\n", edge, *out);
}
for (vector<Node*>::iterator in = edge->inputs_.begin();
in != edge->inputs_.end(); ++in) {
const char* order_only = "";
if (edge->is_order_only(in - edge->inputs_.begin()))
order_only = " style=dotted";
printf("\"%p\" -> \"%p\" [arrowhead=none%s]\n", (*in), edge, order_only);
}
}
for (vector<Node*>::iterator in = edge->inputs_.begin();
in != edge->inputs_.end(); ++in) {
AddTarget(*in);
}
}
void GraphViz::Start() {
printf("digraph ninja {\n");
printf("node [fontsize=10, shape=box, height=0.25]\n");
printf("edge [fontsize=10]\n");
}
void GraphViz::Finish() {
printf("}\n");
}
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