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#include "stdafx.h"
CMLuaVariablesLoader::CMLuaVariablesLoader(lua_State *L) : L(L)
{
}
/***********************************************/
static int mlua__add(lua_State *L)
{
int res = 0;
int nargs = lua_gettop(L);
for (int i = 1; i <= nargs; i++)
res += luaL_optinteger(L, i, 0);
lua_pushfstring(L, "%d", res);
return 1;
}
static int mlua__div(lua_State *L)
{
int x = luaL_optinteger(L, 1, 0);
int y = luaL_optinteger(L, 2, 0);
lua_pushfstring(L, "%d", x - y);
return 1;
}
static int mlua__hex(lua_State *L)
{
int x = luaL_optinteger(L, 1, 0);
int pad = luaL_optinteger(L, 2, 0);
CMStringA format(FORMAT, "0x%%0%dx", pad);
CMStringA value(FORMAT, format, x);
lua_pushstring(L, value);
return 1;
}
static int mlua__max(lua_State *L)
{
int res = 0;
int nargs = lua_gettop(L);
for (int i = 1; i <= nargs; i++) {
int val = luaL_optinteger(L, i, INT_MIN);
if (val > res)
res = val;
}
lua_pushfstring(L, "%d", res);
return 1;
}
static int mlua__min(lua_State *L)
{
int res = 0;
int nargs = lua_gettop(L);
for (int i = 1; i <= nargs; i++) {
int val = luaL_optinteger(L, i, INT_MAX);
if (val < res)
res = val;
}
lua_pushfstring(L, "%d", res);
return 1;
}
static int mlua__mod(lua_State *L)
{
int x = luaL_optinteger(L, 1, 0);
int y = luaL_optinteger(L, 2, 0);
lua_pushfstring(L, "%d", x % y);
return 1;
}
static int mlua__mul(lua_State *L)
{
int x = luaL_optinteger(L, 1, 0);
int y = luaL_optinteger(L, 2, 0);
lua_pushfstring(L, "%d", x * y);
return 1;
}
static int mlua__muldiv(lua_State *L)
{
int x = luaL_optinteger(L, 1, 0);
int y = luaL_optinteger(L, 2, 0);
int z = luaL_optinteger(L, 3, 0);
lua_pushfstring(L, "%d", (x * y) / z);
return 1;
}
static int mlua__num(lua_State *L)
{
int x = luaL_optinteger(L, 1, 0);
int pad = luaL_optinteger(L, 2, 0);
CMStringA format(FORMAT, "%%0%dx", pad);
CMStringA value(FORMAT, format, x);
lua_pushstring(L, value);
return 1;
}
static int mlua__rand(lua_State *L)
{
lua_pushfstring(L, "%d", rand());
return 1;
}
static wchar_t* translate(lua_State *L, const wchar_t *format, const wchar_t *extra, MCONTACT hContact = NULL)
{
std::wregex regex(L"\\?([a-z_0-9]+)\\(");
std::wstring query = std::regex_replace(format, regex, L"_v$1(");
query.insert(0, L"return ");
CMLuaEnvironment env(L);
wchar_t *result = env.Eval(query.c_str());
env.Unload();
return result;
}
static int mlua_vars(lua_State *L)
{
ptrW format(mir_utf8decodeW(lua_tostring(L, 1)));
ptrW extra(mir_utf8decodeW(lua_tostring(L, 2)));
MCONTACT hContact = lua_tointeger(L, 3);
ptrW result(translate(L, format, extra, hContact));
lua_pushstring(L, T2Utf(result));
return 1;
}
/***********************************************/
INT_PTR FormatString(void *obj, WPARAM wParam, LPARAM)
{
lua_State *L = (lua_State*)obj;
FORMATINFO *fi = (FORMATINFO*)wParam;
ptrW result;
if ((fi->flags & FIF_UNICODE) == 0) {
_A2T format(fi->szFormat.a);
_A2T extra(fi->szExtraText.a);
result = translate(L, format, extra, fi->hContact);
}
else
result = translate(L, fi->szFormat.w, fi->szExtraText.w, fi->hContact);
lua_pushstring(L, T2Utf(result));
return (INT_PTR)result.detach();
}
/***********************************************/
void CMLuaVariablesLoader::LoadVariables()
{
if (ServiceExists(MS_VARS_FORMATSTRING))
return;
// CreateServiceFunctionObj(MS_VARS_FORMATSTRING, FormatString, L);
Log("Loading variables functions");
lua_register(L, "vars", mlua_vars);
// math
lua_register(L, "_vadd", mlua__add);
lua_register(L, "_vdiv", mlua__div);
lua_register(L, "_vhex", mlua__hex);
lua_register(L, "_vmax", mlua__max);
lua_register(L, "_vmin", mlua__min);
lua_register(L, "_vmod", mlua__mod);
lua_register(L, "_vmul", mlua__mul);
lua_register(L, "_vmuldiv", mlua__muldiv);
lua_register(L, "_vnum", mlua__num);
lua_register(L, "_vrand", mlua__rand);
}
void CMLuaVariablesLoader::Load(lua_State *L)
{
CMLuaVariablesLoader loader(L);
loader.LoadVariables();
}
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