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#include "stdafx.h"
CMLuaFunctionLoader::CMLuaFunctionLoader(lua_State *L) : L(L)
{
}
/***********************************************/
static int mlua_print(lua_State *L)
{
CMStringA data;
int nargs = lua_gettop(L);
for (int i = 1; i <= nargs; i++) {
switch (lua_type(L, i)) {
case LUA_TNIL:
data.Append("nil");
break;
case LUA_TBOOLEAN:
data.AppendFormat("%s", lua_toboolean(L, i) ? "true" : "false");
break;
case LUA_TNUMBER:
data.AppendFormat("%s", lua_tostring(L, i));
break;
case LUA_TSTRING:
data.AppendFormat("'%s'", lua_tostring(L, i));
break;
default:
if (luaL_callmeta(L, i, "__tostring")) {
data.AppendFormat("'%s'", lua_tostring(L, -1));
break;
}
data.AppendFormat("%s(0x%p)", luaL_typename(L, i), lua_topointer(L, i));
break;
}
data.Append(", ");
}
if (data.GetLength() >= 1)
data.Delete(data.GetLength() - 2, 2);
Log(data.GetBuffer());
return 0;
}
static int mlua_toansi(lua_State *L)
{
const char *value = luaL_checkstring(L, 1);
int codepage = luaL_optinteger(L, 2, Langpack_GetDefaultCodePage());
ptrA string(mir_strdup(value));
lua_pushstring(L, mir_utf8decodecp(string, codepage, nullptr));
return 1;
}
static int mlua_toucs2(lua_State *L)
{
const char *value = luaL_checkstring(L, 1);
ptrW unicode(mir_utf8decodeW(value));
size_t length = mir_wstrlen(unicode) * sizeof(wchar_t);
ptrA string((char*)mir_calloc(length + 1));
memcpy(string, unicode, length);
lua_pushlstring(L, string, length + 1);
return 1;
}
static int mlua_topointer(lua_State *L)
{
switch (lua_type(L, 1)) {
case LUA_TBOOLEAN:
lua_pushlightuserdata(L, (void*)lua_toboolean(L, 1));
break;
case LUA_TNUMBER:
if (lua_isinteger(L, 1)) {
lua_Integer value = lua_tointeger(L, 1);
if (value > INTPTR_MAX) {
const char *msg = lua_pushfstring(L, "%f is larger than %d", value, INTPTR_MAX);
return luaL_argerror(L, 1, msg);
}
lua_pushlightuserdata(L, (void*)value);
}
break;
case LUA_TSTRING:
lua_pushlightuserdata(L, (void*)lua_tostring(L, 1));
break;
case LUA_TLIGHTUSERDATA:
lua_pushvalue(L, 1);
default:
return luaL_argerror(L, 1, luaL_typename(L, 1));
}
return 1;
}
static int mlua_tonumber(lua_State *L)
{
if (lua_islightuserdata(L, 1)) {
lua_Integer value = (lua_Integer)lua_touserdata(L, 1);
lua_pushinteger(L, value);
return 1;
}
int n = lua_gettop(L);
lua_pushvalue(L, lua_upvalueindex(1));
lua_pushvalue(L, 1);
if (n == 2)
lua_pushvalue(L, 2);
luaM_pcall(L, n, 1);
return 1;
}
static int mlua_interpolate(lua_State *L)
{
const char *string = luaL_checkstring(L, 1);
char pattern[128];
if (lua_istable(L, 2)) {
for (lua_pushnil(L); lua_next(L, 2); lua_pop(L, 3)) {
lua_pushvalue(L, -2);
const char *key = lua_tostring(L, -1);
const char *val = lua_tostring(L, -2);
mir_snprintf(pattern, "{%s}", key);
string = luaL_gsub(L, string, pattern, val ? val : "");
}
}
else {
int nargs = lua_gettop(L);
for (int i = 2; i <= nargs; i++) {
const char *val = lua_tostring(L, i);
mir_snprintf(pattern, "{%d}", i - 1);
string = luaL_gsub(L, string, pattern, val ? val : "");
lua_pop(L, 1);
}
}
lua_Debug ar;
int level = 1;
while (lua_getstack(L, level++, &ar)) {
int i = 1;
while (const char *name = lua_getlocal(L, &ar, i++)) {
const char *val = lua_tostring(L, -1);
mir_snprintf(pattern, "{%s}", name);
string = luaL_gsub(L, string, pattern, val ? val : "");
lua_pop(L, 1);
}
}
lua_pushstring(L, string);
return 1;
}
/***********************************************/
void CMLuaFunctionLoader::LoadFunctions()
{
Log("Loading additional functions");
lua_register(L, "print", mlua_print);
lua_register(L, "a", mlua_toansi);
lua_register(L, "toansi", mlua_toansi);
lua_register(L, "u", mlua_toucs2);
lua_register(L, "toucs2", mlua_toucs2);
lua_register(L, "topointer", mlua_topointer);
lua_getglobal(L, "tonumber");
lua_pushcclosure(L, mlua_tonumber, 1);
lua_setglobal(L, "tonumber");
lua_pushstring(L, "");
lua_getmetatable(L, -1);
lua_pushstring(L, "__mod");
lua_pushcfunction(L, mlua_interpolate);
lua_rawset(L, -3);
lua_pushstring(L, "__index");
lua_rawget(L, -2);
lua_pushcfunction(L, mlua_interpolate);
lua_setfield(L, -2, "interpolate");
lua_pop(L, 3);
}
void CMLuaFunctionLoader::Load(lua_State *L)
{
CMLuaFunctionLoader loader(L);
loader.LoadFunctions();
}
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