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#ifdef CJSON_STANDALONE
#include <lua.h>
#include <lauxlib.h>
#include <lualib.h>
#else
#define LITE_XL_PLUGIN_ENTRYPOINT
#include <lite_xl_plugin_api.h>
#endif
#include "cJSON.h"
#include "cJSON.c"
typedef struct json_t {
int allocated;
cJSON* json;
} json_t;
static cJSON* lua_tocjson(lua_State* L, int index) {
json_t* value = luaL_testudata(L, index, "cjson");
return value ? value->json : NULL;
}
static int lua_pushcjson(lua_State* L, cJSON* json, int allocated) {
if (json) {
switch (json->type) {
case cJSON_Array:
case cJSON_Object: {
json_t* value = lua_newuserdata(L, sizeof(json_t));
luaL_setmetatable(L, "cjson");
value->json = json;
value->allocated = allocated;
} break;
case cJSON_Number: lua_pushnumber(L, cJSON_GetNumberValue(json)); break;
case cJSON_True: lua_pushboolean(L, 1); break;
case cJSON_False: lua_pushboolean(L, 0); break;
case cJSON_String: lua_pushstring(L, cJSON_GetStringValue(json)); break;
default: lua_pushnil(L); break;
}
} else
lua_pushnil(L);
return 1;
}
static cJSON* f_cjson_parse(lua_State* L, int index) {
switch (lua_type(L, index)) {
case LUA_TTABLE:
lua_len(L, index);
int length = lua_tointeger(L, -1);
lua_pop(L, 1);
if (length > 0) {
cJSON* array = cJSON_CreateArray();
for (int i = 1; i <= length; ++i) {
lua_geti(L, index, i);
cJSON_AddItemToArray(array, f_cjson_parse(L, -1));
lua_pop(L, 1);
}
return array;
} else {
cJSON* object = cJSON_CreateObject();
lua_pushvalue(L, index);
lua_pushnil(L);
while (lua_next(L, -2)) {
lua_pushvalue(L, -2);
const char *key = lua_tostring(L, -1);
cJSON_AddItemToObject(object, lua_tostring(L, -1), f_cjson_parse(L, -2));
lua_pop(L, 2);
}
lua_pop(L, 1);
return object;
}
break;
case LUA_TBOOLEAN: return lua_toboolean(L, index) ? cJSON_CreateTrue() : cJSON_CreateFalse();
case LUA_TSTRING: return cJSON_CreateString(lua_tostring(L, index));
case LUA_TNUMBER: return cJSON_CreateNumber(lua_tonumber(L, index));
case LUA_TUSERDATA: {
cJSON* json = lua_tocjson(L, index);
return json ? json : cJSON_CreateNull();
} break;
default: return cJSON_CreateNull();
}
}
static int f_cjson_gc(lua_State* L) {
json_t* value = lua_touserdata(L, 1);
if (value->allocated)
cJSON_Delete(value->json);
}
static int f_cjson_index(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
switch (json->type) {
case cJSON_Object: lua_pushcjson(L, cJSON_GetObjectItem(json, luaL_checkstring(L, 2)), 0); break;
case cJSON_Array: lua_pushcjson(L, cJSON_GetArrayItem(json, luaL_checkinteger(L, 2) - 1), 0); break;
default: return luaL_error(L, "invalid index");
}
return 1;
}
static int f_cjson_len(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
switch (json->type) {
case cJSON_Array: lua_pushinteger(L, cJSON_GetArraySize(json)); break;
default: return luaL_error(L, "length operation invalid");
}
return 1;
}
static int f_cjson_newindex(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
switch (json->type) {
case cJSON_Array: {
int index = luaL_checkinteger(L, 2);
cJSON* value = f_cjson_parse(L, 3);
cJSON_ReplaceItemInArray(json, index, value);
} break;
case cJSON_Object: {
const char* key = luaL_checkstring(L, 2);
cJSON* value = f_cjson_parse(L, 3);
cJSON_AddItemToObject(json, key, value);
} break;
default: return luaL_error(L, "assignment operation invalid");
}
return 0;
}
typedef struct json_object_iterator_t {
cJSON* json;
cJSON* current;
} json_object_iterator_t;
static int f_cjson_next(lua_State* L) {
json_object_iterator_t* iterator = lua_touserdata(L, 1);
iterator->current = lua_isnil(L, 2) ? iterator->json->child : iterator->current->next;
if (!iterator->current)
return 0;
lua_pushstring(L, iterator->current->string);
lua_pushcjson(L, iterator->current, 0);
return 2;
}
static int f_cjson_inext(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
int index = !lua_isnil(L, 2) ? lua_tointeger(L, 2) : 0;
int length = cJSON_GetArraySize(json);
if (index >= length)
return 0;
lua_pushinteger(L, index + 1);
lua_pushcjson(L, cJSON_GetArrayItem(json, index), 0);
return 2;
}
static int f_cjson_pairs(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
if (json->type != cJSON_Array)
return luaL_error(L, "invalid value for ipairs");
lua_pushcfunction(L, f_cjson_next);
json_object_iterator_t* iterator = lua_newuserdata(L, sizeof(json_object_iterator_t));
iterator->json = json;
iterator->current = NULL;
lua_pushnil(L);
return 3;
}
static int f_cjson_ipairs(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
if (json->type != cJSON_Array)
return luaL_error(L, "invalid value for ipairs");
lua_pushcfunction(L, f_cjson_inext);
lua_pushvalue(L, 1);
lua_pushinteger(L, 0);
return 3;
}
static const luaL_Reg cjson_value[] = {
{ "__gc", f_cjson_gc },
{ "__index", f_cjson_index },
{ "__newindex", f_cjson_newindex },
{ "__pairs", f_cjson_pairs },
{ "__ipairs", f_cjson_ipairs },
{ "__len", f_cjson_len },
{ NULL, NULL }
};
static int f_cjson_encode(lua_State* L) {
cJSON* json = lua_tocjson(L, 1);
char* str = cJSON_PrintUnformatted(json);
lua_pushstring(L, str);
free(str);
return 1;
}
static int f_cjson_decode(lua_State* L) {
size_t len;
const char* str = luaL_checklstring(L, 1, &len);
return lua_pushcjson(L, cJSON_ParseWithLength(str, len), 1);
}
static const luaL_Reg cjson_lib[] = {
{ "encode", f_cjson_encode },
{ "decode", f_cjson_decode },
{ NULL, NULL }
};
#ifndef CJSON_STANDALONE
int luaopen_lite_xl_cjson(lua_State* L, void* XL) {
lite_xl_plugin_init(XL);
#else
int luaopen_libraries_cjson(lua_State* L) {
#endif
luaL_newmetatable(L, "cjson");
luaL_setfuncs(L, cjson_value, 0);
lua_newtable(L);
luaL_setfuncs(L, cjson_lib, 0);
return 1;
}
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