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#include "luautil.h"
#include "debug.h"
#include <string>
#include <vector>
std::vector< void * > pointers;
#include <arpa/inet.h>
#define GLOBAL_PREFIX "magic_global_"
void *Pracro::getGlobal(lua_State *L, std::string name)
{
unsigned int top;
unsigned int index;
std::string var = std::string(GLOBAL_PREFIX) + name;
lua_getfield(L, LUA_GLOBALSINDEX, var.c_str());
top = lua_gettop(L);
index = lua_tointeger(L, top);
return pointers.at(index);
}
void Pracro::setGlobal(lua_State *L, std::string name, void *p)
{
char value_of_this[256];
std::string val = std::string(GLOBAL_PREFIX) + name;
pointers.push_back(p);
unsigned int index = pointers.size() - 1;
sprintf(value_of_this, "%s = %u\n", val.c_str(), index);
int s = luaL_loadstring(L, value_of_this);
switch(s) {
case 0:
break;
case LUA_ERRSYNTAX:
case LUA_ERRMEM:
fprintf(stderr, "Error: %s\n", lua_tostring(L, lua_gettop(L)));
default:
fprintf(stderr, "Unknown return value of luaL_loadstring.\n");
}
s = lua_pcall(L, 0, LUA_MULTRET, 0);
switch(s) {
case 0:
break;
case LUA_ERRRUN:
case LUA_ERRMEM:
case LUA_ERRERR:
fprintf(stderr, "Error: %s\n", lua_tostring(L, lua_gettop(L)));
break;
default:
fprintf(stderr, "Error: Unknown return value of lua_pcall.\n");
break;
}
}
void Pracro::call(lua_State *L, std::string function, int numargs)
{
lua_getglobal(L, function.c_str());
int s = lua_pcall(L, numargs, LUA_MULTRET, 0);
switch(s) {
case 0:
break;
case LUA_ERRRUN:
case LUA_ERRMEM:
case LUA_ERRERR:
fprintf(stderr, "Error: %s\n", lua_tostring(L, lua_gettop(L)));
break;
default:
fprintf(stderr, "Error: Unknown return value of lua_pcall.\n");
break;
}
}
int Pracro::checkParameters(lua_State *L, ...)
{
va_list ap;
va_start(ap, L);
size_t nargs = lua_gettop(L);
size_t size = 0;
int t;
while(1) {
t = va_arg(ap, int);
if(t == T_END) break;
switch(t) {
case T_STRING:
case T_NUMBER:
case T_BOOLEAN:
break;
default:
return luaL_error(L,"Unknown type specifier [%d] at position %d. "
"Missing TYPE_END?", t, size+1);
}
size++;
}
va_end(ap);
if(nargs != size) {
return luaL_error(L, "Number of args expected %d, got %d", size, nargs);
}
va_start(ap, L);
size_t idx = 0;
while(1) {
t = va_arg(ap, int);
if(t == T_END) break;
switch(t) {
case T_STRING:
if(lua_isstring(L, lua_gettop(L)-(size-idx-1)) == 0) {
va_end(ap);
return luaL_error(L, "Parameter %d should be of type string.", idx+1);
}
break;
case T_NUMBER:
if(lua_isnumber(L, lua_gettop(L)-(size-idx-1)) == 0) {
va_end(ap);
return luaL_error(L, "Parameter %d should be of type number.", idx+1);
}
break;
case T_BOOLEAN:
if(lua_isboolean(L, lua_gettop(L)-(size-idx-1)) == 0) {
va_end(ap);
return luaL_error(L, "Parameter %d should be of type boolean.", idx+1);
}
break;
default:
va_end(ap);
return luaL_error(L,"Unknown type specifier [%d] at position %d. "
"Missing TYPE_END?", t, idx+1);
}
idx++;
}
va_end(ap);
return 0;
}
#ifdef TEST_LUAUTIL
#include "test.h"
#define LUAPROG \
"testfunc('a string', 42, true)"
#define LUAPROG_BAD1 \
"testfunc('a string', 42)"
#define LUAPROG_BAD2 \
"testfunc('a string', 42, true, 'another one')"
#define LUAPROG_BAD3 \
"testfunc(false, 42, 'string')"
#define LUAPROG_MISSING_END \
"testfunc_bad('a string', 42, true, 1)"
static int testfunc(lua_State *L)
{
Pracro::checkParameters(L,
Pracro::T_STRING,
Pracro::T_NUMBER,
Pracro::T_BOOLEAN,
Pracro::T_END);
return 0;
}
static int testfunc_bad(lua_State *L)
{
Pracro::checkParameters(L,
Pracro::T_STRING,
Pracro::T_NUMBER,
Pracro::T_BOOLEAN,
Pracro::T_NUMBER);
return 0;
}
TEST_BEGIN;
int a, b, c;
lua_State *L;
L = luaL_newstate();
if(L == NULL) TEST_FATAL("Could not allocate lua state.");
luaL_openlibs(L);
Pracro::setGlobal(L, "a", &a);
Pracro::setGlobal(L, "b", &b);
Pracro::setGlobal(L, "c", &c);
TEST_EQUAL(Pracro::getGlobal(L, "b"), &b, "Test get global");
TEST_EQUAL(Pracro::getGlobal(L, "c"), &c, "Test get global");
TEST_EQUAL(Pracro::getGlobal(L, "a"), &a, "Test get global");
lua_register(L, "testfunc", testfunc);
if(luaL_loadstring(L, LUAPROG)) {
TEST_FATAL(lua_tostring(L, lua_gettop(L)))
}
TEST_EQUAL_INT(lua_pcall(L, 0, LUA_MULTRET, 0), 0, "Good one");
if(luaL_loadstring(L, LUAPROG_BAD1)) {
TEST_FATAL(lua_tostring(L, lua_gettop(L)))
}
TEST_NOTEQUAL_INT(lua_pcall(L, 0, LUA_MULTRET, 0), 0, "Too short one");
if(luaL_loadstring(L, LUAPROG_BAD2)) {
TEST_FATAL(lua_tostring(L, lua_gettop(L)))
}
TEST_NOTEQUAL_INT(lua_pcall(L, 0, LUA_MULTRET, 0), 0, "Too long one");
if(luaL_loadstring(L, LUAPROG_BAD3)) {
TEST_FATAL(lua_tostring(L, lua_gettop(L)))
}
TEST_NOTEQUAL_INT(lua_pcall(L, 0, LUA_MULTRET, 0), 0, "Plain wrong");
lua_register(L, "testfunc_bad", testfunc_bad);
if(luaL_loadstring(L, LUAPROG_MISSING_END)) {
TEST_FATAL(lua_tostring(L, lua_gettop(L)))
}
TEST_NOTEQUAL_INT(lua_pcall(L, 0, LUA_MULTRET, 0), 0, "Missing T_END");
lua_close(L);
TEST_END;
#endif
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