InflexionGraph.cpp
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#include <string>
#include <cassert>
#include <climits>
#include <vector>
#include <iostream>
#include "utils.hpp"
#include "InflexionGraph.hpp"
using namespace std;
void InflexionGraph::addStartEdge(const Edge& e) {
if (this->graph.empty()) {
assert(this->node2ChunkStartPtr.empty());
this->graph.push_back(vector<Edge>());
this->node2ChunkStartPtr.push_back(e.chunk.chunkStartPtr);
}
assert(this->node2ChunkStartPtr[0] == e.chunk.chunkStartPtr);
this->graph[0].push_back(e);
}
void InflexionGraph::addMiddleEdge(unsigned int startNode, const Edge& e) {
assert(startNode < e.nextNode);
assert(startNode == this->graph.size());
if (startNode == this->graph.size()) {
this->graph.push_back(vector<Edge>());
this->node2ChunkStartPtr.push_back(e.chunk.chunkStartPtr);
}
this->graph[startNode].push_back(e);
}
static inline bool chunkIsAtFront(
const InterpretedChunk& chunk,
const std::vector<InterpretedChunk>& path) {
unsigned int i;
for (i = 0; i < path.size() - 1 && path[i].orthWasShifted; i++) {
}
assert(!path[i].orthWasShifted);
return &chunk == &(path[i]);
}
static inline bool chunkIsAtBack(
const InterpretedChunk& chunk,
const std::vector<InterpretedChunk>& path) {
return &chunk == &(path.back());
}
static inline bool chunkIsTheOnlyOne(
const InterpretedChunk& chunk,
const std::vector<InterpretedChunk>& path) {
return chunkIsAtFront(chunk, path) && chunkIsAtBack(chunk, path);
}
void InflexionGraph::addPath(const std::vector<InterpretedChunk>& path, bool weak) {
// debugPath(path);
// debugGraph(this->graph);
if (weak && !this->empty() && !this->onlyWeakPaths) {
return;
}
else if (this->onlyWeakPaths && !weak) {
this->graph.clear();
this->node2ChunkStartPtr.clear();
this->onlyWeakPaths = false;
}
for (unsigned int i = 0; i < path.size(); i++) {
const InterpretedChunk& chunk = path[i];
if (!chunk.orthWasShifted) {
if (chunkIsTheOnlyOne(chunk, path)) {
Edge e = {chunk, UINT_MAX};
this->addStartEdge(e);
}
else if (chunkIsAtFront(chunk, path)) {
Edge e = {chunk, this->graph.empty() ? 1 : (unsigned int) this->graph.size()};
this->addStartEdge(e);
}
else if (chunkIsAtBack(chunk, path)) {
Edge e = {chunk, UINT_MAX};
this->addMiddleEdge((unsigned int) this->graph.size(), e);
}
else {
Edge e = {chunk, (int) this->graph.size() + 1};
this->addMiddleEdge((unsigned int) this->graph.size(), e);
}
}
}
}
bool InflexionGraph::canMergeNodes(unsigned int node1, unsigned int node2) {
return this->node2ChunkStartPtr[node1] == this->node2ChunkStartPtr[node2]
&& this->getPossiblePaths(node1) == this->getPossiblePaths(node2);
}
set<InflexionGraph::Path> InflexionGraph::getPossiblePaths(unsigned int node) {
if (node == UINT_MAX || node == this->graph.size() - 1) {
return set<InflexionGraph::Path>();
} else {
set<InflexionGraph::Path> res;
vector<Edge>& edges = this->graph.at(node);
for (unsigned int i = 0; i < edges.size(); i++) {
Edge& e = edges[i];
InflexionGraph::PathElement pathElem(e.chunk.chunkStartPtr, e.chunk.interpsGroup.type);
if (e.nextNode != this->graph.size()) {
set<Path> possiblePaths = this->getPossiblePaths(e.nextNode);
vector<Path> nextPaths(possiblePaths.begin(), possiblePaths.end());
vector<Path>::iterator it;
for (it = nextPaths.begin(); it != nextPaths.end(); ++it) {
(*it).insert(pathElem);
}
res.insert(nextPaths.begin(), nextPaths.end());
}
}
return res;
}
}
static bool containsEqualEdge(const vector<InflexionGraph::Edge>& edges, const InflexionGraph::Edge& e) {
for (unsigned int i = 0; i < edges.size(); i++) {
const InflexionGraph::Edge& e1 = edges[i];
if (e1.chunk.chunkStartPtr == e.chunk.chunkStartPtr
&& e1.chunk.lowercaseCodepoints == e.chunk.lowercaseCodepoints
&& e1.chunk.interpsGroup.type == e.chunk.interpsGroup.type
&& e1.nextNode == e.nextNode) {
return true;
}
}
return false;
}
void InflexionGraph::redirectEdges(unsigned int fromNode, unsigned int toNode) {
for (unsigned int node = 0; node < fromNode; node++) {
vector<Edge>& edges = this->graph[node];
vector<Edge>::iterator edgesIt = edges.begin();
while (edgesIt != edges.end()) {
Edge& oldEdge = *edgesIt;
if (oldEdge.nextNode == fromNode) {
Edge newEdge = {oldEdge.chunk, toNode};
if (!containsEqualEdge(edges, newEdge)) {
// if newEdge is not in edges, redirect edgeEdge
// so it becomes newEdge
oldEdge.nextNode = toNode;
} else {
// if newEdge is already there, just remove old edge
edges.erase(edgesIt);
}
} else {
++edgesIt;
}
}
}
}
void InflexionGraph::doRemoveNode(unsigned int node) {
for (unsigned int i = node + 1; i < this->graph.size(); i++) {
redirectEdges(i, i - 1);
this->graph[i - 1] = this->graph[i];
this->node2ChunkStartPtr[i - 1] = this->node2ChunkStartPtr[i];
}
this->graph.pop_back();
this->node2ChunkStartPtr.pop_back();
}
void InflexionGraph::doMergeNodes(unsigned int node1, unsigned int node2) {
if (node1 > node2) {
doMergeNodes(node2, node1);
} else {
// node1 < node2
for (unsigned int i = 0; i < this->graph[node2].size(); i++) {
Edge& e = this->graph[node2][i];
if (!containsEqualEdge(graph[node1], e)) {
this->graph[node1].push_back(e);
}
}
// DEBUG("1");
// debugGraph(this->graph);
this->redirectEdges(node2, node1);
// DEBUG("2");
// debugGraph(this->graph);
this->doRemoveNode(node2);
// DEBUG("3");
// debugGraph(this->graph);
}
}
bool InflexionGraph::tryToMergeTwoNodes() {
for (unsigned int node1 = 0; node1 < this->graph.size(); node1++) {
for (unsigned int node2 = this->graph.size() - 1; node2 > node1; node2--) {
if (this->canMergeNodes(node1, node2)) {
this->doMergeNodes(node1, node2);
return true;
}
}
}
return false;
}
void InflexionGraph::minimizeGraph() {
if (this->graph.size() > 2) {
// debugGraph(this->graph);
while (this->tryToMergeTwoNodes()) {
// debugGraph(this->graph);
}
}
}
bool InflexionGraph::empty() const {
return this->graph.empty();
}
void InflexionGraph::repairLastNodeNumbers() {
for (unsigned int i = 0; i < this->graph.size(); i++) {
vector<Edge>& edges = this->graph[i];
for (unsigned int j = 0; j < edges.size(); j++) {
Edge& e = edges[j];
if (e.nextNode == UINT_MAX) {
e.nextNode = this->graph.size();
}
}
}
}