Function searchpath

src/Chain/libraries/glua/loadlib.cpp:401–423

static const char *searchpath(lua_State *L, const char *name,
    const char *path,
    const char *sep,
    const char *dirsep) {
    //if (glua::util::starts_with(name, ADDRESS_CONTRACT_PREFIX))
    //	return nullptr;
    luaL_Buffer msg;  /* to build error message */
    luaL_buffinit(L, &msg);
    if (*sep != '\0')  /* non-empty separator? */
        name = luaL_gsub(L, name, sep, dirsep);  /* replace it by 'dirsep' */
    while ((path = pushnexttemplate(L, path)) != nullptr) { // 这步好像改变了lua_real_execute_contract_api函数中的api_name的内容
        const char *filename = luaL_gsub(L, lua_tostring(L, -1),
            LUA_PATH_MARK, name);
        lua_remove(L, -2);  /* remove path template */
        if (readable(filename))  /* does file exist and is readable? */
            return filename;  /* return that file name */
        lua_pushfstring(L, "\n\tno file '%s'", filename);
        lua_remove(L, -2);  // remove file name 
        luaL_addvalue(&msg);  /* concatenate error msg. entry */
    }
    luaL_pushresult(&msg);  /* create error message */
    return nullptr;  /* not found */
}


static int ll_searchpath(lua_State *L) {