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#include "stdafx.h"
static void lua2json(lua_State *L, JSONNode &node)
{
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:
{
lua_Integer val = lua_tointeger(L, -1);
if (lua_isinteger(L, -1) && val >= LONG_MIN && val <= LONG_MIN)
node = (long)val;
else
node = lua_tonumber(L, -1);
break;
}
case LUA_TTABLE:
{
ptrA name(mir_strdup(node.name()));
node.cast(JSON_ARRAY);
node.set_name((char*)name);
lua_pushnil(L);
while (lua_next(L, -2) != 0) {
JSONNode child;
if (!lua_isnumber(L, -2)) {
if (node.type() == JSON_ARRAY) {
node.cast(JSON_NODE);
node.set_name((char*)name);
}
const char *key = lua_tostring(L, -2);
child.set_name(key);
}
lua2json(L, child);
node << child;
lua_pop(L, 1);
}
break;
}
}
}
/***********************************************/
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);
lua2json(L, child);
node << child;
return 0;
}
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;
}
const struct luaL_Reg jsonApi[] =
{
{ "__index", json__index },
{ "__newindex", json__newindex },
{ "__len", json__len },
{ "__tostring", json__tostring },
{ "__gc", json__gc },
{ nullptr, nullptr }
};
/***********************************************/
static int lua_Decode(lua_State *L)
{
const char *string = luaL_checkstring(L, 1);
JSONNode *node = json_parse(string);
new (L) JSON(node);
luaL_setmetatable(L, MT_JSON);
return 1;
}
static int lua_Encode(lua_State *L)
{
switch (lua_type(L, 1))
{
case LUA_TNIL:
lua_pushliteral(L, "null");
break;
case LUA_TBOOLEAN:
lua_pushstring(L, lua_toboolean(L, 1) ? "true" : "false");
break;
case LUA_TNUMBER:
{
if (lua_isinteger(L, 1)) {
lua_pushfstring(L, "%I", lua_tointeger(L, 1));
break;
}
char decpoint = lua_getlocaledecpoint();
if (decpoint != '.') {
char p[2] = { decpoint };
luaL_gsub(L, lua_tostring(L, 1), p, ".");
}
else
lua_pushfstring(L, "%f", lua_tonumber(L, 1));
break;
}
case LUA_TSTRING:
lua_pushfstring(L, "\"%s\"", lua_tostring(L, 1));
break;
case LUA_TTABLE:
{
JSONNode node;
lua_pushnil(L);
lua_pushvalue(L, 1);
lua2json(L, node);
lua_pop(L, 2);
lua_pushstring(L, node.write().c_str());
break;
}
case LUA_TUSERDATA:
{
JSONNode &node = *((JSON*)luaL_checkudata(L, 1, MT_JSON))->node;
lua_pushstring(L, node.write().c_str());
break;
}
case LUA_TLIGHTUSERDATA:
if (lua_touserdata(L, 1) == nullptr)
{
lua_pushliteral(L, "null");
break;
}
default:
luaL_argerror(L, 1, luaL_typename(L, 1));
}
return 1;
}
static const luaL_Reg methods[] =
{
{ "Decode", lua_Decode },
{ "Encode", lua_Encode },
{ nullptr, nullptr }
};
LUAMOD_API int luaopen_m_json(lua_State *L)
{
luaL_newlib(L, methods);
luaL_newmetatable(L, MT_JSON);
luaL_setfuncs(L, jsonApi, 0);
lua_pop(L, 1);
return 1;
}
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