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test_h3pgmHandler.cpp
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test_h3pgmHandler.cpp
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#include "lua.hpp" // luajit
#include <iostream>
#include <string>
using namespace std;
////////////////////////////////////////////////////////////////////////////////
////////// LuaWrap
////////////////////////////////////////////////////////////////////////////////
lua_State* LuaWrap_load(string filepath)
{
lua_State *L = luaL_newstate();
luaL_openlibs(L);
int err = luaL_dofile(L,filepath.c_str());
if (err != 0)
{
cout << "LUA CALL Error "<< err << ": " << lua_tostring(L,-1) << endl;
return NULL; // todo should throw exception, or os.exit()
}
return L;
}
void LuaWrap_close(lua_State *L)
{
lua_close(L);
}
////////////////////////////////////////////////////////////////////////////////
////////// h3pgm structures
////////////////////////////////////////////////////////////////////////////////
// todo random_seeds
struct RandomSeeds
{
int LMLGenerator;
int CellularTerrain;
// todo
};
RandomSeeds RandomSeeds_pop(lua_State *L, int posindex)
{ // WARNING: 'index' is not popped from the stack
if (posindex < 0) // negative index given
posindex = lua_gettop(L) + 1 + posindex;
RandomSeeds rs;
lua_getfield(L, posindex, "LMLGenerator");
rs.LMLGenerator = (int)lua_tonumber(L, -1);
lua_pop(L,1);
lua_getfield(L, posindex, "CellularTerrain");
rs.CellularTerrain = (int)lua_tonumber(L, -1);
lua_pop(L,1);
return rs;
}
struct LMLInit
{
string zones;
string features;
};
LMLInit LMLInit_pop(lua_State *L, int posindex) // http://stackoverflow.com/questions/18478379/how-to-work-with-tables-passed-as-an-argument-to-a-lua-c-function
{ // WARNING: 'index' is not popped from the stack
if (posindex < 0) // negative index given
posindex = lua_gettop(L) + 1 + posindex;
lua_getfield(L, posindex, "zones");
lua_getfield(L, posindex, "features");
// stack now has following: (for index==-1)
// -1 3 = features
// -2 2 = zones
// -3 1 = { zones='...', features='...' }
string zones( lua_tostring(L, -2) ); // check if string omitted
string features( lua_tostring(L, -1) ); // check if string omitted
lua_pop(L,2);
return {zones,features};
}
void LMLInit_push(lua_State *L, LMLInit lmlinit) // pushes lmlinit on the top of the stack
{
lua_newtable(L); // create a table at the top of the stack
lua_pushstring(L, "zones"); // key
lua_pushstring(L, lmlinit.zones.c_str()); // value
lua_settable(L, -3); // t[k] = v t: given index, v: top (-1), k: below top (-2)
lua_pushstring(L, "features");
lua_pushstring(L, lmlinit.features.c_str());
lua_settable(L, -3);
return;
}
////////////////////////////////////////////////////////////////////////////////
////////// h3pgmReader
////////////////////////////////////////////////////////////////////////////////
int h3pgmReader_getTest(lua_State *L)
{
lua_getglobal(L, "test");
if (!lua_isnumber(L, -1))
{
cout << "LUA CALL WARNING: 'test' should be a number" << endl; //error(L, "`test' should be a number\n");
return -1;
}
int test = (int)lua_tonumber(L, -1);
lua_pop(L,1); // can do without
return test;
}
string h3pgmReader_getVersion(lua_State *L)
{
lua_getglobal(L, "version");
if (!lua_isstring(L, -1))
{
cout << "LUA CALL ERROR: 'version' should be a string" << endl;
return NULL;
}
const char* version = lua_tostring(L, -1);
string version2( version );
lua_pop(L,1); // can do without
return version;
}
LMLInit h3pgmReader_getLMLInit(lua_State *L)
{
lua_getglobal(L, "LML_initializer");
if (!lua_istable(L, -1))
{
cout << "LUA CALL ERROR: 'LML_initializer' should be a table" << endl;
return {"",""};
}
LMLInit lmlinit = LMLInit_pop(L, 1); // positive index - from the bottom
lua_pop(L,1); // Pop outer table
return lmlinit;
}
RandomSeeds h3pgmReader_getRandomSeeds(lua_State *L)
{
RandomSeeds rs;
lua_getglobal(L, "random_seeds");
if (!lua_istable(L, -1))
{
cout << "LUA CALL ERROR: 'random_seeds' should be a table" << endl;
return rs;
}
rs = RandomSeeds_pop(L, 1);
lua_pop(L,1);
return rs;
}
////////////////////////////////////////////////////////////////////////////////
////////// h3pgmWriter
////////////////////////////////////////////////////////////////////////////////
int h3pgmWriter_load(lua_State *L, string filepath)
{
lua_getglobal(L, "load"); /* function to be called */
lua_pushstring(L, filepath.c_str()); /* push 1st argument */
if (lua_pcall(L, 1, 0, 0) != 0)
{
cout << "LUA Function Call ERROR: function 'load': " << lua_tostring(L, -1) << endl;
return 1;
}
return 0; // ok
}
int h3pgmWriter_save(lua_State *L, string filepath)
{
lua_getglobal(L, "save");
lua_pushstring(L, filepath.c_str());
if (lua_pcall(L, 1, 0, 0) != 0)
{
cout << "LUA Function Call ERROR: function 'save': " << lua_tostring(L, -1) << endl;
return 1;
}
return 0; // ok
}
int h3pgmWriter_setVersion(lua_State *L, string version) // make global handler for that ??
{
lua_getglobal(L, "update"); /* function to be called */
lua_pushstring(L, "version"); /* push 1st argument */
lua_pushstring(L, version.c_str()); /* push 2nd argument */
if (lua_pcall(L, 2, 0, 0) != 0)
{
cout << "LUA Function Call ERROR: function 'update': " << lua_tostring(L, -1) << endl;
return 1;
}
return 0; // ok
}
int h3pgmWriter_setLMLInit(lua_State *L, LMLInit lmlinit) // make global handler for that ??
{ // http://stackoverflow.com/questions/3987837/pushing-a-lua-table
lua_getglobal(L, "update"); /* function to be called */
lua_pushstring(L, "LML_initializer"); /* push 1st argument */
LMLInit_push(L, lmlinit); /* push 2nd argument (the entire struct */
if (lua_pcall(L, 2, 0, 0) != 0)
{
cout << "LUA Function Call ERROR: function 'update': " << lua_tostring(L, -1) << endl;
return 1;
}
return 0; // ok
}
////////////////////////////////////////////////////////////////////////////////
////////// LMLGenerator
////////////////////////////////////////////////////////////////////////////////
int LMLGenerator_run(int seed, LMLInit lmlinit) // for now all is encapsulated in one function (!) do we need to make it separate? with lua_State *L,
{
lua_State* L = LuaWrap_load("LMLGenerator/LMLGenerator.lua");
lua_getglobal(L, "debug");
lua_getfield(L, -1, "traceback");
lua_remove(L, -2);
lua_getglobal(L, "GenerateLML"); // function to be called
lua_pushnumber(L, seed); // push 1st argument
LMLInit_push(L, lmlinit); // push 2nd argument (the entire struct
if (lua_pcall(L, 2, 0, -4) != 0) // 4th arg: -2 - number_of_f_arguments (or 0 if no error handling function)
{
cout << "LUA Function Call ERROR: function 'GenerateLML': " << lua_tostring(L, -1) << endl;
return 1;
}
LuaWrap_close(L);
return 0; // ok // todo - make structure to return LMLGraph
}
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////
int main(int argc, char **argv)
{
cout << ">> Reading Tests:" << endl;
string filename;
cout << "Insert filename (with extension) [dot for default load]: ";
//cin >> filename;
filename = string("."); // no input for faster tests
if (filename == ".")
{
//filename="h3pgm.lua";
filename="out_mapsaves/test.h3pgm";
cout << "default load: " << filename << endl;
}
lua_State* H3PGMReader = LuaWrap_load(filename);
cout << "> Loaded " << filename << ".test = " << h3pgmReader_getTest(H3PGMReader) << endl;
string version = h3pgmReader_getVersion(H3PGMReader);
cout << "> Loaded " << filename << ".version = " << version << endl;
LMLInit lmlinit = h3pgmReader_getLMLInit(H3PGMReader);
cout << "> Loaded " << filename << ".LML_initializer.zones = " << lmlinit.zones << endl;
cout << "> Loaded " << filename << ".LML_initializer.features = " << lmlinit.features << endl;
RandomSeeds rs = h3pgmReader_getRandomSeeds(H3PGMReader);
cout << "> Loaded " << filename << ".RandomSeeds.CellularTerrain = " << rs.CellularTerrain << endl;
LuaWrap_close(H3PGMReader);
cout << ">> Writing Tests:" << endl;
lua_State* H3PGMWriter = LuaWrap_load("H3PGMWriter/H3PGMWriter.lua");
h3pgmWriter_load(H3PGMWriter, filename);
version += "lpha";
h3pgmWriter_setVersion(H3PGMWriter, version);
lmlinit.zones += ",L4";
h3pgmWriter_setLMLInit(H3PGMWriter, lmlinit);
h3pgmWriter_save(H3PGMWriter, "out_mapsaves/test_2.h3pgm");
LuaWrap_close(H3PGMWriter);
cout << ">> Reread Tests:" << endl;
lua_State* H3PGMReader2 = LuaWrap_load("out_mapsaves/test_2.h3pgm");
LuaWrap_close(H3PGMReader2);
cout << "> Still alive :-)" << endl;
cout << ">> Calling LMLGenerator:" << endl;
LMLGenerator_run(rs.LMLGenerator, lmlinit);
cout << "> After return from lua" << endl;
return 0;
}