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#include "Log.hpp"
#include <iostream>
#include <iomanip>
#include <vector>
#include <sstream>
#include "Complete.hpp"
#include "Expression.hpp"
#include "Operator.hpp"
#include "EquationSystem.hpp"
#include "MaxStrategy.hpp"
#include "VariableAssignment.hpp"
#include <ctime>
extern "C" {
#include "parser/EquationSystemParser.h"
#include "parser/EquationSystemLexer.h"
}
using namespace std;
template<typename T>
Expression<T>& treeToExpression(pANTLR3_BASE_TREE node, EquationSystem<T>& system) {
ANTLR3_UINT32 num = node->getChildCount(node);
string name = (char*) node->getText(node)->chars;
if (num == 0) {
// leaf node -> constant or variable
if (name == "inf") {
return system.constant(infinity<T>());
} else {
stringstream stream(name);
T output;
if (stream >> output) {
return system.constant(output);
} else {
return system.variable(name);
}
}
}
// anything that's not a constant/variable
vector<Expression<T>*> args;
pANTLR3_BASE_TREE childNode;
for (unsigned int i = 0; i < num; ++i) {
childNode = (pANTLR3_BASE_TREE) node->getChild(node, i);
args.push_back(&treeToExpression(childNode, system));
}
if (name == "max") {
return system.maxExpression(args);
} else {
Operator<T>* op = NULL;
if (name == "min") {
op = new Minimum<T>();
} else if (name == "+" || name == "add") {
op = new Addition<T>();
} else if (name == "-") {
if (args.size() == 1) {
op = new Negation<T>();
} else {
op = new Subtraction<T>();
}
} else if (name == "sub") {
op = new Subtraction<T>();
} else if (name == "*" || name == "mult") {
op = new Multiplication<T>();
} else if (name == ";") {
op = new Comma<T>();
} else if (name == "GUARD" || name == "guard") {
op = new Guard<T>();
} else {
std::cout << "throw exception" << *(char*)NULL;
//throw "Parse error: Unknown operator";
}
return system.expression(op, args);
}
}
template<typename T>
void treeToSystem(pANTLR3_BASE_TREE node, EquationSystem<T>& system) {
ANTLR3_UINT32 num = node->getChildCount(node);
if (num % 2 == 1) {
std::cout << "throw exception" << *(char*)NULL;
//throw "Big problem here.";
}
pANTLR3_BASE_TREE varNode;
pANTLR3_BASE_TREE exprNode;
for (unsigned int i = 0; i < num; i += 2) {
varNode = (pANTLR3_BASE_TREE) node->getChild(node, i);
exprNode = (pANTLR3_BASE_TREE) node->getChild(node, i+1);
string varName = (char*) varNode->getText(varNode)->chars;
Variable<T>& var = system.variable(varName);
vector<Expression<T>*> args;
args.push_back(&system.constant(-infinity<T>()));
args.push_back(&treeToExpression(exprNode, system));
system[var] = &system.maxExpression(args);
}
}
typedef Complete<int> ZBar;
int main (int argc, char* argv[]) {
map<string,log::Logger*> loggers;
loggers["strategy"] = &log::strategy;
loggers["fixpoint"] = &log::fixpoint;
loggers["debug"] = &log::debug;
set<string> variables;
if (argc > 2) {
int i = 2;
while (argv[i] != NULL) {
if (string(argv[i]) == "-v") {
++i;
if (i < argc) {
char* arg = argv[i];
char* str = strtok(arg, ",");
do {
if (str && loggers[str])
loggers[str]->enabled(true);
} while ((str = strtok(NULL, ",")) != NULL);
}
} else {
variables.insert(argv[i]);
}
++i;
}
}
pANTLR3_INPUT_STREAM input = antlr3FileStreamNew((pANTLR3_UINT8)argv[1], ANTLR3_ENC_8BIT);
pEquationSystemLexer lex = EquationSystemLexerNew(input);
pANTLR3_COMMON_TOKEN_STREAM tokens = antlr3CommonTokenStreamSourceNew(ANTLR3_SIZE_HINT, TOKENSOURCE(lex));
pEquationSystemParser parser = EquationSystemParserNew(tokens);
EquationSystemParser_equation_system_return ret = parser -> equation_system(parser);
std::cerr << "Parse complete." << std::endl;
EquationSystem<ZBar> system;
treeToSystem<ZBar>(ret.tree, system);
log::debug << system << endl;
system.indexMaxExpressions(); // make reverse-lookup O(1) instead of O(n)
std::cerr << "System created and indexed." << std::endl;
Solver<ZBar> solver(system); // local *and* lazy. I love it!
timespec start, finish;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &start);
if (variables.size() > 0) {
for (set<string>::iterator it = variables.begin(), ei = variables.end();
it != ei;
++it) {
solver.solve(system.variable(*it));
}
} else {
for (unsigned int i = 0, size = system.variableCount(); i < size; ++i) {
solver.solve(system.variable(i));
}
}
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &finish);
std::cerr << "System solved." << std::endl;
if (variables.size() > 0) {
for (unsigned int i = 0, size = system.variableCount(); i < size; ++i) {
Variable<ZBar>& var = system.variable(i);
if (variables.find(var.name()) != variables.end())
cout << var.name() << " = " << solver.solve(var) << endl;
}
} else {
for (unsigned int i = 0, size = system.variableCount(); i < size; ++i) {
Variable<ZBar>& var = system.variable(i);
cout << var.name() << " = " << solver.solve(var) << endl;
}
}
timespec temp;
if ((finish.tv_nsec-start.tv_nsec)<0) {
temp.tv_sec = finish.tv_sec-start.tv_sec-1;
temp.tv_nsec = 1000000000+finish.tv_nsec-start.tv_nsec;
} else {
temp.tv_sec = finish.tv_sec-start.tv_sec;
temp.tv_nsec = finish.tv_nsec-start.tv_nsec;
}
cerr << "Time taken: " << temp.tv_sec << "." << setfill('0') << setw(9) << temp.tv_nsec << " seconds." << endl;
parser -> free(parser);
tokens -> free(tokens);
lex -> free(lex);
input -> close(input);
return 0;
}
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