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/* ScummVM Tools
*
* ScummVM Tools is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include <cxxtest/TestSuite.h>
#include "decompiler/control_flow.h"
#include "decompiler/disassembler.h"
#include "decompiler/graph.h"
#include "decompiler/codegen.h"
#include "decompiler/scummv6/engine.h"
#include "decompiler/kyra/engine.h"
#include <vector>
#define GET(vertex) (boost::get(boost::vertex_name, g, vertex))
#include <streambuf>
#include <ostream>
// Define an ostream which doesn't output anything to avoid clutter
// Source: http://groups.google.com/group/comp.lang.c++/msg/4a81a74500f9f4d3?hl=en
template<class cT, class traits = std::char_traits<cT> >
class basic_nullbuf: public std::basic_streambuf<cT, traits> {
typename traits::int_type overflow(typename traits::int_type c)
{
return traits::not_eof(c);
}
};
template<class cT, class traits = std::char_traits<cT> >
class basic_onullstream: public std::basic_ostream<cT, traits> {
public:
basic_onullstream():
std::basic_ios<cT, traits>(&m_sbuf),
std::basic_ostream<cT, traits>(&m_sbuf)
{
this->init(&m_sbuf);
}
private:
basic_nullbuf<cT, traits> m_sbuf;
};
typedef basic_onullstream<char> onullstream;
std::string removeSpaces(std::string s) {
size_t found;
while ((found = s.find(' '))!=std::string::npos)
s = s.erase(found,1);
return s;
}
typedef std::vector<std::string>::iterator CodeIterator;
class CodeGenTestSuite : public CxxTest::TestSuite {
public:
void testContinue() {
InstVec insts;
Scumm::v6::Scummv6Engine *engine = new Scumm::v6::Scummv6Engine();
Disassembler *d = engine->getDisassembler(insts);
d->open("decompiler/test/continue-do-while.dmp");
d->disassemble();
delete d;
ControlFlow *c = new ControlFlow(insts, engine);
c->createGroups();
Graph g = c->analyze();
onullstream ns;
CodeGenerator *cg = engine->getCodeGenerator(ns);
cg->generate(g);
VertexIterator v = boost::vertices(g).first;
std::vector<std::string> output, expected;
expected.push_back("do{");
expected.push_back("if(18 != var321) {");
expected.push_back("continue;");
expected.push_back("}");
expected.push_back("VAR_CHARSET_MASK--;");
expected.push_back("} while (42 == VAR_CHARSET_MASK)");
expected.push_back("stopObjectCodeA();");
GroupPtr gr = GET(*v);
// Find first node
while (gr->_prev != NULL)
gr = gr->_prev;
// Copy out all lines of code
while (gr != NULL) {
for (std::vector<CodeLine>::iterator it = gr->_code.begin(); it != gr->_code.end(); ++it)
output.push_back(it->_line);
gr = gr->_next;
}
TS_ASSERT(output.size() == expected.size());
CodeIterator it, it2;
for (it = output.begin(), it2 = expected.begin(); it != output.end() && it2 != expected.end(); ++it, ++it2) {
TS_ASSERT(removeSpaces(*it).compare(removeSpaces(*it2)) == 0);
}
delete cg;
delete c;
delete engine;
}
void testBreak() {
InstVec insts;
Scumm::v6::Scummv6Engine *engine = new Scumm::v6::Scummv6Engine();
Disassembler *d = engine->getDisassembler(insts);
d->open("decompiler/test/break-while.dmp");
d->disassemble();
delete d;
ControlFlow *c = new ControlFlow(insts, engine);
c->createGroups();
Graph g = c->analyze();
onullstream ns;
CodeGenerator *cg = engine->getCodeGenerator(ns);
cg->generate(g);
VertexIterator v = boost::vertices(g).first;
std::vector<std::string> output, expected;
expected.push_back("while (42 != VAR_CHARSET_MASK) {");
expected.push_back("if (18 != var321) {");
expected.push_back("break;");
expected.push_back("}");
expected.push_back("VAR_CHARSET_MASK--;");
expected.push_back("}");
expected.push_back("stopObjectCodeA();");
GroupPtr gr = GET(*v);
// Find first node
while (gr->_prev != NULL)
gr = gr->_prev;
// Copy out all lines of code
while (gr != NULL) {
for (std::vector<CodeLine>::iterator it = gr->_code.begin(); it != gr->_code.end(); ++it)
output.push_back(it->_line);
gr = gr->_next;
}
TS_ASSERT(output.size() == expected.size());
CodeIterator it, it2;
for (it = output.begin(), it2 = expected.begin(); it != output.end() && it2 != expected.end(); ++it, ++it2) {
TS_ASSERT(removeSpaces(*it).compare(removeSpaces(*it2)) == 0);
}
delete cg;
delete c;
delete engine;
}
void testElse() {
InstVec insts;
Scumm::v6::Scummv6Engine *engine = new Scumm::v6::Scummv6Engine();
Disassembler *d = engine->getDisassembler(insts);
d->open("decompiler/test/if-else.dmp");
d->disassemble();
delete d;
ControlFlow *c = new ControlFlow(insts, engine);
c->createGroups();
Graph g = c->analyze();
onullstream ns;
CodeGenerator *cg = engine->getCodeGenerator(ns);
cg->generate(g);
VertexIterator v = boost::vertices(g).first;
std::vector<std::string> output, expected;
expected.push_back("if (42 != VAR_CHARSET_MASK) {");
expected.push_back("VAR_CHARSET_MASK--;");
expected.push_back("} else {");
expected.push_back("VAR_CHARSET_MASK++;");
expected.push_back("}");
expected.push_back("stopObjectCodeA();");
GroupPtr gr = GET(*v);
// Find first node
while (gr->_prev != NULL)
gr = gr->_prev;
// Copy out all lines of code
while (gr != NULL) {
for (std::vector<CodeLine>::iterator it = gr->_code.begin(); it != gr->_code.end(); ++it)
output.push_back(it->_line);
gr = gr->_next;
}
TS_ASSERT(output.size() == expected.size());
CodeIterator it, it2;
for (it = output.begin(), it2 = expected.begin(); it != output.end() && it2 != expected.end(); ++it, ++it2) {
TS_ASSERT(removeSpaces(*it).compare(removeSpaces(*it2)) == 0);
}
delete cg;
delete c;
delete engine;
}
};
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