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lighttpd2/src/value_lua.c

159 lines
3.4 KiB

#include <lighttpd/value_lua.h>
#include <lighttpd/condition_lua.h>
#include <lighttpd/actions_lua.h>
/* replace a negative stack index with a positive one,
* so that you don't need to care about push/pop
*/
static int lua_fixindex(lua_State *L, int ndx) {
int top;
if (ndx < 0 && ndx >= -(top = lua_gettop(L)))
ndx = top + ndx + 1;
return ndx;
}
static value* value_from_lua_table(server *srv, lua_State *L, int ndx) {
value *val = NULL, *sub_option;
GArray *list = NULL;
GHashTable *hash = NULL;
int ikey;
GString *skey;
ndx = lua_fixindex(L, ndx);
lua_pushnil(L);
while (lua_next(L, ndx) != 0) {
switch (lua_type(L, -2)) {
case LUA_TNUMBER:
if (hash) goto mixerror;
if (!list) {
val = value_new_list();
list = val->data.list;
}
ikey = lua_tointeger(L, -2);
if (ikey < 0) {
ERROR(srv, "Invalid key < 0: %i - skipping entry", ikey);
lua_pop(L, 1);
continue;
}
sub_option = value_from_lua(srv, L);
if (!sub_option) continue;
if ((size_t) ikey >= list->len) {
g_array_set_size(list, ikey + 1);
}
g_array_index(list, value*, ikey) = sub_option;
break;
case LUA_TSTRING:
if (list) goto mixerror;
if (!hash) {
val = value_new_hash();
hash = val->data.hash;
}
skey = lua_togstring(L, -2);
if (g_hash_table_lookup(hash, skey)) {
ERROR(srv, "Key already exists in hash: '%s' - skipping entry", skey->str);
lua_pop(L, 1);
continue;
}
sub_option = value_from_lua(srv, L);
if (!sub_option) {
g_string_free(skey, TRUE);
continue;
}
g_hash_table_insert(hash, skey, sub_option);
break;
default:
ERROR(srv, "Unexpted key type in table: %s (%i) - skipping entry", lua_typename(L, -1), lua_type(L, -1));
lua_pop(L, 1);
break;
}
}
return val;
mixerror:
ERROR(srv, "%s", "Cannot mix list with hash; skipping remaining part of table");
lua_pop(L, 2);
return val;
}
value* value_from_lua(server *srv, lua_State *L) {
value *val;
switch (lua_type(L, -1)) {
case LUA_TNIL:
lua_pop(L, 1);
return value_new_none();
case LUA_TBOOLEAN:
val = value_new_bool(lua_toboolean(L, -1));
lua_pop(L, 1);
return val;
case LUA_TNUMBER:
val = value_new_number(lua_tonumber(L, -1));
lua_pop(L, 1);
return val;
case LUA_TSTRING:
val = value_new_string(lua_togstring(L, -1));
lua_pop(L, 1);
return val;
case LUA_TTABLE:
val = value_from_lua_table(srv, L, -1);
lua_pop(L, 1);
return val;
case LUA_TUSERDATA:
{ /* check for action */
action *a = lua_get_action(L, -1);
if (a) {
action_acquire(a);
lua_pop(L, 1);
return val = value_new_action(srv, a);
}
}
{ /* check for condition */
condition *c = lua_get_condition(L, -1);
if (c) {
condition_acquire(c);
lua_pop(L, 1);
return val = value_new_condition(srv, c);
}
}
ERROR(srv, "%s", "Unknown lua userdata");
lua_pop(L, 1);
return NULL;
case LUA_TLIGHTUSERDATA:
case LUA_TFUNCTION:
case LUA_TTHREAD:
case LUA_TNONE:
default:
ERROR(srv, "Unexpected lua type: %s (%i)", lua_typename(L, -1), lua_type(L, -1));
lua_pop(L, 1);
return NULL;
}
}
GString* lua_togstring(lua_State *L, int ndx) {
const char *buf;
size_t len = 0;
GString *str = NULL;
if (lua_type(L, ndx) == LUA_TSTRING) {
buf = lua_tolstring(L, ndx, &len);
if (buf) str = g_string_new_len(buf, len);
} else {
lua_pushvalue(L, ndx);
buf = lua_tolstring(L, -1, &len);
if (buf) str = g_string_new_len(buf, len);
lua_pop(L, 1);
}
return str;
}