llvm-6502/include/Support/GraphWriter.h

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//===-- Support/GraphWriter.h - Write a graph to a .dot file ---*- C++ -*--===//
//
// This file defines a simple interface that can be used to print out generic
// LLVM graphs to ".dot" files. "dot" is a tool that is part of the AT&T
// graphviz package (http://www.research.att.com/sw/tools/graphviz/) which can
// be used to turn the files output by this interface into a variety of
// different graphics formats.
//
// Graphs do not need to implement any interface past what is already required
// by the GraphTraits template, but they can choose to implement specializations
// of the DOTGraphTraits template if they want to customize the graphs output in
// any way.
//
//===----------------------------------------------------------------------===//
#ifndef SUPPORT_GRAPHWRITER_H
#define SUPPORT_GRAPHWRITER_H
#include "Support/DOTGraphTraits.h"
#include "Support/GraphTraits.h"
#include <vector>
#include <iostream>
namespace DOT { // Private functions...
inline std::string EscapeString(const std::string &Label) {
std::string Str(Label);
for (unsigned i = 0; i != Str.length(); ++i)
switch (Str[i]) {
case '\n':
Str.insert(Str.begin()+i, '\\'); // Escape character...
++i;
Str[i] = 'n';
break;
case '\t':
Str.insert(Str.begin()+i, ' '); // Convert to two spaces
++i;
Str[i] = ' ';
break;
case '\\':
if (i+1 != Str.length() && Str[i+1] == 'l')
break; // don't disturb \l
case '{': case '}':
case '<': case '>':
Str.insert(Str.begin()+i, '\\'); // Escape character...
++i; // don't infinite loop
break;
}
return Str;
}
}
template<typename GraphType>
class GraphWriter {
std::ostream &O;
const GraphType &G;
typedef DOTGraphTraits<GraphType> DOTTraits;
typedef GraphTraits<GraphType> GTraits;
typedef typename GTraits::NodeType NodeType;
typedef typename GTraits::nodes_iterator node_iterator;
typedef typename GTraits::ChildIteratorType child_iterator;
public:
GraphWriter(std::ostream &o, const GraphType &g) : O(o), G(g) {}
void writeHeader(const std::string &Name) {
if (Name.empty())
O << "digraph foo {\n"; // Graph name doesn't matter
else
O << "digraph " << Name << " {\n";
std::string GraphName = DOTTraits::getGraphName(G);
if (!GraphName.empty())
O << "\tlabel=\"" << DOT::EscapeString(GraphName) << "\";\n";
O << DOTTraits::getGraphProperties(G);
O << "\n";
}
void writeFooter() {
// Finish off the graph
O << "}\n";
}
void writeNodes() {
// Loop over the graph, printing it out...
for (node_iterator I = GTraits::nodes_begin(G), E = GTraits::nodes_end(G);
I != E; ++I)
writeNode(&*I);
}
void writeNode(NodeType *Node) {
std::string NodeAttributes = DOTTraits::getNodeAttributes(Node);
O << "\tNode" << (void*)Node << " [shape=record,";
if (!NodeAttributes.empty()) O << NodeAttributes << ",";
O << "label=\"{"
<< DOT::EscapeString(DOTTraits::getNodeLabel(Node, G));
// Print out the fields of the current node...
child_iterator EI = GTraits::child_begin(Node);
child_iterator EE = GTraits::child_end(Node);
if (EI != EE) {
O << "|{";
for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i) {
if (i) O << "|";
O << "<g" << i << ">" << DOTTraits::getEdgeSourceLabel(Node, EI);
}
if (EI != EE)
O << "|truncated...";
O << "}";
}
O << "}\"];\n"; // Finish printing the "node" line
// Output all of the edges now
EI = GTraits::child_begin(Node);
for (unsigned i = 0; EI != EE && i != 64; ++EI, ++i)
writeEdge(Node, i, EI);
}
void writeEdge(NodeType *Node, unsigned edgeidx, child_iterator EI) {
if (NodeType *TargetNode = *EI) {
int DestPort = -1;
if (DOTTraits::edgeTargetsEdgeSource(Node, EI)) {
child_iterator TargetIt = DOTTraits::getEdgeTarget(Node, EI);
// Figure out which edge this targets...
unsigned Offset = std::distance(GTraits::child_begin(TargetNode),
TargetIt);
DestPort = (int)Offset;
}
emitEdge((void *)Node, edgeidx, (void*)TargetNode, DestPort,
DOTTraits::getEdgeAttributes(Node, EI));
}
}
/// emitSimpleNode - Outputs a simple (non-record) node
void emitSimpleNode(const void *ID, const std::string &Attr,
const std::string &Label, unsigned NumEdgeSources = 0,
const std::vector<std::string> *EdgeSourceLabels = 0) {
O << "\tNode" << ID << "[ ";
if (!Attr.empty())
O << Attr << ",";
O << " label =\"";
if (NumEdgeSources) O << "{";
O << DOT::EscapeString(Label);
if (NumEdgeSources) {
O << "|{";
for (unsigned i = 0; i != NumEdgeSources; ++i) {
if (i) O << "|";
O << "<g" << i << ">";
if (EdgeSourceLabels) O << (*EdgeSourceLabels)[i];
}
O << "}}";
}
O << "\"];\n";
}
/// emitEdge - Output an edge from a simple node into the graph...
void emitEdge(const void *SrcNodeID, int SrcNodePort,
const void *DestNodeID, int DestNodePort,
const std::string &Attrs) {
if (SrcNodePort > 64) return; // Eminating from truncated part?
if (DestNodePort > 64) DestNodePort = 64; // Targetting the truncated part?
O << "\tNode" << SrcNodeID;
if (SrcNodePort >= 0)
O << ":g" << SrcNodePort;
O << " -> Node" << (void*)DestNodeID;
if (DestNodePort >= 0)
O << ":g" << DestNodePort;
if (!Attrs.empty())
O << "[" << Attrs << "]";
O << ";\n";
}
};
template<typename GraphType>
std::ostream &WriteGraph(std::ostream &O, const GraphType &G,
const std::string &Name = "") {
// Start the graph emission process...
GraphWriter<GraphType> W(O, G);
// Output the header for the graph...
W.writeHeader(Name);
// Emit all of the nodes in the graph...
W.writeNodes();
// Output any customizations on the graph
DOTGraphTraits<GraphType>::addCustomGraphFeatures(G, W);
// Output the end of the graph
W.writeFooter();
return O;
}
#endif