static int ll_loadfunc(lua_State *L, const char *path, const char *name, int r)
{
void **reg = ll_register(L, path);
if (*reg == NULL) *reg = ll_load(L, path, (*name == '*'));
if (*reg == NULL) {
return PACKAGE_ERR_LIB; /* Unable to load library. */
} else if (*name == '*') { /* Only load library into global namespace. */
lua_pushboolean(L, 1);
return 0;
} else {
const char *sym = r ? name : mksymname(L, name, SYMPREFIX_CF);
lua_CFunction f = ll_sym(L, *reg, sym);
if (f) {
lua_pushcfunction(L, f);
return 0;
}
if (!r) {
const char *bcdata = ll_bcsym(*reg, mksymname(L, name, SYMPREFIX_BC));
lua_pop(L, 1);
if (bcdata) {
if (luaL_loadbuffer(L, bcdata, ~(size_t)0, name) != 0)
return PACKAGE_ERR_LOAD;
return 0;
}
}
return PACKAGE_ERR_FUNC; /* Unable to find function. */
}
}
static int ll_loadfunc (lua_State *L, const char* path, const char* sym) {
void** reg = ll_register(L, path);
if (*reg == nullptr) *reg = ll_load(L, path);
if (*reg == nullptr)
return ERRLIB; /* unable to load library */
else {
lua_CFunction f = ll_sym(L, *reg, sym);
if (f == nullptr)
return ERRFUNC; /* unable to find function */
lua_pushcfunction(L, f);
return 0; /* return function */
}
}
static int ll_loadfunc(lua_State *L, const char *path, const char *sym)
{
void **reg = ll_register(L, path);
if (*reg == NULL) *reg = ll_load(L, path);
if (*reg == NULL) {
return PACKAGE_ERR_LIB; /* unable to load library */
} else {
lua_CFunction f = ll_sym(L, *reg, sym);
if (f == NULL)
return PACKAGE_ERR_FUNC; /* unable to find function */
lua_pushcfunction(L, f);
return 0; /* return function */
}
}
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
void **reg = ll_register(L, path);
if (*reg == NULL) *reg = ll_load(L, path, *sym == '*');
if (*reg == NULL) return ERRLIB; /* unable to load library */
if (*sym == '*') { /* loading only library (no function)? */
lua_pushboolean(L, 1); /* return 'true' */
return 0; /* no errors */
}
else {
lua_CFunction f = ll_sym(L, *reg, sym);
if (f == NULL)
return ERRFUNC; /* unable to find function */
lua_pushcfunction(L, f); /* else create new function */
return 0; /* no errors */
}
}
static int ll_loadfunc (lua_State *L, const char *path, const char *sym) {
void *reg = ll_checkclib(L, path); /* check loaded C libraries */
if (reg == NULL) { /* must load library? */
reg = ll_load(L, path, *sym == '*');
if (reg == NULL) return ERRLIB; /* unable to load library */
ll_addtoclib(L, path, reg);
}
if (*sym == '*') { /* loading only library (no function)? */
lua_pushboolean(L, 1); /* return 'true' */
return 0; /* no errors */
}
else {
lua_CFunction f = ll_sym(L, reg, sym);
if (f == NULL)
return ERRFUNC; /* unable to find function */
lua_pushcfunction(L, f); /* else create new function */
return 0; /* no errors */
}
}
int main(int argc, char *argv[]) {
lb_idtype lb_id;
lzo_uint lb_overhead;
lzo_uint lb_offset;
lzo_bytep lb_data;
lzo_bytep lb_temp;
/* start up the stuff */
#ifdef _WIN32
char selfname[MAX_PATH]; /* Flawfinder: ignore */
if (GetModuleFileName(NULL,selfname,sizeof(selfname))==0)
lb_error("cannot locate this executable");
argv[0] = selfname;
#endif /* not _WIN32 */
lb_progname = lb_fnname(argv[0]);
const char *lb_path = lb_tmppath();
if (lb_path == NULL) lb_cannot("find","tmp dir",NULL);
if (lzo_init() != LZO_E_OK)
lb_error("internal LZO error");
if ((L = luaL_newstate()) == NULL) lb_error("not enough memory");
luaL_openlibs(L);
LBCONF_USERFUNC_INIT(L);
/* open and load */
FILE *lb_file = fopen(argv[0],"rb"); /* Flawfinder: ignore */
if (lb_file == NULL)
lb_cannot("open",argv[0],NULL);
if (fseek(lb_file,-sizeof(lb_id),SEEK_END)!=0)
lb_cannot("seek",argv[0],NULL);
if (fread(&lb_id,sizeof(lb_id),1,lb_file)!=1)
lb_cannot("read",argv[0],NULL);
if (memcmp(lb_id.id,"LB02",4)!=0)
lb_error("missing overlay");
if (fseek(lb_file,-(sizeof(lb_id)+lb_id.nlen),SEEK_END)!=0)
lb_cannot("seek",argv[0],NULL);
if (lb_id.dlen != 0) {
lb_overhead = lb_id.dlen / 16 + 64 + 3;
lb_offset = lb_id.dlen + lb_overhead - lb_id.nlen;
lb_temp = (lzo_bytep)alloca(lb_id.dlen + lb_overhead);
lb_data = lb_temp + lb_offset;
} else
lb_data = (lzo_bytep)alloca(lb_id.nlen);
if (fread(lb_data,lb_id.nlen,1,lb_file)!=1)
lb_cannot("read",argv[0],NULL);
fclose(lb_file);
/* checksum */
if (lzo_adler32(0,(lzo_bytep)lb_data,lb_id.nlen)!=lb_id.adler32)
lb_error("bad checksum");
/* decompress */
if (lb_id.dlen != 0) {
lzo_uint new_len;
int r = lzo1x_decompress(lb_data,lb_id.nlen,lb_temp,&new_len,NULL);
if (r != LZO_E_OK || new_len != lb_id.dlen)
lb_error("overlapping decompression failed");
lb_data = lb_temp;
} else
lb_id.dlen = lb_id.nlen;
/* set parameters (arg = argv) */
lua_newtable(L);
{ int i;
for (i=0;i <= argc; i++) {
lua_pushstring(L,argv[i]);
lua_rawseti(L,-2,i);
}
}
lua_setglobal(L,"arg");
/* setup the clean up */
lua_newtable(L);
lua_setfield(L,LUA_REGISTRYINDEX,"_LBCM");
lua_getfield(L,LUA_REGISTRYINDEX,"_LBCM"); /* _LBCM is at index 1 */
atexit(lb_quit);
/* link, load and run loop */
lua_getfield(L,LUA_REGISTRYINDEX,"_LOADED"); /* _LOADED is at index 2 */
char *buf = lb_data;
uint32_t ptr = 0;
do {
char _type = *buf++;
char _nlen = *buf++;
char *_name = alloca((size_t)_nlen+1);
memcpy(_name,buf,_nlen); /* Flawfinder: ignore */
_name[_nlen] = '\0';
buf += _nlen;
uint32_t _size;
memcpy(&_size,buf,4); /* Flawfinder: ignore */
buf += 4;
switch (_type) {
case LB_LUAMAIN: /* run */
if (luaL_loadbuffer(L,buf,_size,_name))
lb_error(lua_tostring(L,-1));
int i = 1;
for(;i <= argc;i++)
lua_pushstring(L,argv[i]);
if (lua_pcall(L,i-1,0,0))
lb_error(lua_tostring(L,-1));
return 0;
case LB_LMODULE: /* load */
case LB_CMODULE: /* link and load */
lua_getfield(L,2,_name); /* _LOADED[name] */
if (lua_toboolean(L,-1)) { /* is it there? */
if (lua_touserdata(L,-1) == sentinel) { /* check loops */
lua_pushfstring(L,"loop or previous error loading module '%s'",_name);
lb_error(lua_tostring(L,-1));
}
lua_pop(L,2);
break; /* package is already loaded */
} else lua_pop(L,1);
/* else must load it */
if (_type == LB_LMODULE) {
if (luaL_loadbuffer(L,buf,_size,_name))
lb_error(lua_tostring(L,-1));
} else {
lua_pushfstring(L,"%s/%s%s",lb_path,_name,LB_DLEXT);
lb_libcreate(lua_tostring(L,-1),buf,_size);
void *_lib = ll_load(L,lua_tostring(L,-1));
if (_lib == NULL) lb_cannot("load library",_name,lua_tostring(L,-1));
lua_CFunction _fun = ll_sym(L,_lib,mkfuncname(L,_name));
if (_fun == NULL) lb_cannot("find function",lua_tostring(L,-2),lua_tostring(L,-1));
lua_pop(L,1); /* pop value from mkfuncname() */
lua_pushlightuserdata(L,_lib);
lua_settable(L,1); /* _LBCM[libname] = _lib */
lua_pushcfunction(L,_fun);
}
lua_pushlightuserdata(L,sentinel);
lua_setfield(L,2,_name); /* _LOADED[name] = sentinel */
lua_pushstring(L,_name); /* pass name as argument to module */
if (lua_pcall(L,1,1,0)) /* run loaded module */
lb_error(lua_tostring(L,-1));
if (!lua_isnil(L,-1)) /* non-nil return ? */
lua_setfield(L,2,_name); /* _LOADED[name] = returned value */
lua_getfield(L,2,_name);
if (lua_touserdata(L,-1)==sentinel){ /* module did not set a value? */
lua_pushboolean(L,1); /* use true as result */
lua_setfield(L,2,_name); /* _LOADED[name] = true */
}
break;
case LB_LIBRARY: /* link */
lua_pushfstring(L,"%s/%s%s",lb_path,_name,LB_DLEXT);
lb_libcreate(lua_tostring(L,-1),buf,_size);
void *_lib = ll_load(L,lua_tostring(L,-1));
if (_lib == NULL) lb_cannot("load library",_name,lua_tostring(L,-1));
lua_pushlightuserdata(L,_lib);
lua_settable(L,1); /* _LBCM[libname] = _lib */
break;
}
buf += _size;
ptr += 2 + _nlen + 4 + _size;
} while (ptr < lb_id.dlen);
return 0;
}
