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Scripting WIP

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This commit is contained in:
Perttu Ahola 2011-11-12 03:21:40 +02:00
parent f145d498a6
commit ea8d6d7abd
7 changed files with 118 additions and 76 deletions
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62
src/script.cpp
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@ -41,68 +41,6 @@ void script_error(lua_State *L, const char *fmt, ...)
exit(EXIT_FAILURE);
}
void script_call_va(lua_State *L, const char *func, const char *sig, ...)
{
va_list vl;
int narg, nres; /* number of arguments and results */
va_start(vl, sig);
lua_getglobal(L, func); /* push function */
for (narg = 0; *sig; narg++) {
/* repeat for each argument */
/* check stack space */
luaL_checkstack(L, 1, "too many arguments");
switch (*sig++) {
case 'd': /* double argument */
lua_pushnumber(L, va_arg(vl, double));
break;
case 'i': /* int argument */
lua_pushinteger(L, va_arg(vl, int));
break;
case 's': /* string argument */
lua_pushstring(L, va_arg(vl, char *));
break;
case '>': /* end of arguments */
goto endargs;
default:
script_error(L, "invalid option (%c)", *(sig - 1));
}
}
endargs:
nres = strlen(sig); /* number of expected results */
if (lua_pcall(L, narg, nres, 0) != 0) /* do the call */
script_error(L, "error calling '%s': %s", func, lua_tostring(L, -1));
nres = -nres; /* stack index of first result */
while (*sig) { /* repeat for each result */
switch (*sig++) {
case 'd': /* double result */
if (!lua_isnumber(L, nres))
script_error(L, "wrong result type");
*va_arg(vl, double *) = lua_tonumber(L, nres);
break;
case 'i': /* int result */
if (!lua_isnumber(L, nres))
script_error(L, "wrong result type");
*va_arg(vl, int *) = lua_tointeger(L, nres);
break;
case 's': /* string result */
if (!lua_isstring(L, nres))
script_error(L, "wrong result type");
*va_arg(vl, const char **) = lua_tostring(L, nres);
break;
default:
script_error(L, "invalid option (%c)", *(sig - 1));
}
nres++;
}
va_end(vl);
}
bool script_load(lua_State *L, const char *path)
{
infostream<<"Loading and running script from "<<path<<std::endl;