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#include "stdafx.h"
void lua2json(lua_State *L, JSONNode &node)
{
const char *name = lua_tostring(L, -2);
switch (lua_type(L, -1))
{
case LUA_TNIL:
node.nullify();
break;
case LUA_TSTRING:
node = lua_tostring(L, -1);
break;
case LUA_TBOOLEAN:
node = lua_toboolean(L, -1) != 0;
break;
case LUA_TNUMBER:
node = lua_tonumber(L, -1);
break;
case LUA_TTABLE:
{
node.cast(JSON_NODE);
if (name)
node.set_name(name);
lua_pushnil(L);
while (lua_next(L, -2) != 0)
{
JSONNode child;
lua2json(L, child);
node << child;
lua_pop(L, 1);
}
}
}
}
static int json__index(lua_State *L)
{
JSONNode &node = *((JSON*)luaL_checkudata(L, 1, MT_JSON))->node;
switch (node.type())
{
case JSON_NULL:
lua_pushnil(L);
break;
case JSON_STRING:
lua_pushstring(L, node.as_string().c_str());
break;
case JSON_NUMBER:
lua_pushnumber(L, node.as_int());
break;
case JSON_BOOL:
lua_pushboolean(L, node.as_bool());
break;
case JSON_NODE:
case JSON_ARRAY:
new (L) JSONNode(node);
luaL_setmetatable(L, MT_JSON);
}
return 1;
}
static int json__newindex(lua_State *L)
{
JSONNode &node = *((JSON*)luaL_checkudata(L, 1, MT_JSON))->node;
const char *key = lua_tostring(L, 2);
JSONNode child = node[key];
if (child.isnull())
{
child.set_name(key);
node << child;
}
lua2json(L, child);
node[key] = child;
return 0;
}
static int json__len(lua_State *L)
{
JSONNode &node = *((JSON*)luaL_checkudata(L, 1, MT_JSON))->node;
lua_pushnumber(L, node.size());
return 1;
}
static int json__tostring(lua_State *L)
{
JSONNode &node = *((JSON*)luaL_checkudata(L, 1, MT_JSON))->node;
lua_pushstring(L, node.write().c_str());
return 1;
}
static int json__gc(lua_State *L)
{
JSON *json = (JSON*)luaL_checkudata(L, 1, MT_JSON);
delete json;
return 0;
}
static const struct luaL_Reg jsonApi[] =
{
{ "__index", json__index },
{ "__newindex", json__newindex },
{ "__len", json__len },
{ "__tostring", json__tostring },
{ "__gc", json__gc },
{ NULL, NULL }
};
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