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/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file script_info.cpp Implementation of ScriptFileInfo. */
#include "../stdafx.h"
#include "squirrel_helper.hpp"
#include "script_info.hpp"
#include "script_scanner.hpp"
/** Number of operations to get the author and similar information. */
static const int MAX_GET_OPS = 1000;
/** Number of operations to create an instance of a script. */
static const int MAX_CREATEINSTANCE_OPS = 100000;
ScriptFileInfo::~ScriptFileInfo()
{
free(this->author);
free(this->name);
free(this->short_name);
free(this->description);
free(this->date);
free(this->instance_name);
free(this->url);
free(this->main_script);
free(this->tar_file);
free(this->SQ_instance);
}
bool ScriptFileInfo::CheckMethod(const char *name) const
{
if (!this->engine->MethodExists(*this->SQ_instance, name)) {
char error[1024];
snprintf(error, sizeof(error), "your info.nut/library.nut doesn't have the method '%s'", name);
this->engine->ThrowError(error);
return false;
}
return true;
}
/* static */ SQInteger ScriptFileInfo::Constructor(HSQUIRRELVM vm, ScriptFileInfo *info)
{
/* Set some basic info from the parent */
info->SQ_instance = MallocT<SQObject>(1);
Squirrel::GetInstance(vm, info->SQ_instance, 2);
/* Make sure the instance stays alive over time */
sq_addref(vm, info->SQ_instance);
ScriptScanner *scanner = (ScriptScanner *)Squirrel::GetGlobalPointer(vm);
info->engine = scanner->GetEngine();
static const char * const required_functions[] = {
"GetAuthor",
"GetName",
"GetShortName",
"GetDescription",
"GetVersion",
"GetDate",
"CreateInstance",
};
for (size_t i = 0; i < lengthof(required_functions); i++) {
if (!info->CheckMethod(required_functions[i])) return SQ_ERROR;
}
info->main_script = strdup(scanner->GetMainScript());
const char *tar_name = scanner->GetTarFile();
if (tar_name != NULL) info->tar_file = strdup(tar_name);
/* Cache the data the info file gives us. */
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetAuthor", &info->author, MAX_GET_OPS)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetName", &info->name, MAX_GET_OPS)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetShortName", &info->short_name, MAX_GET_OPS)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetDescription", &info->description, MAX_GET_OPS)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetDate", &info->date, MAX_GET_OPS)) return SQ_ERROR;
if (!info->engine->CallIntegerMethod(*info->SQ_instance, "GetVersion", &info->version, MAX_GET_OPS)) return SQ_ERROR;
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "CreateInstance", &info->instance_name, MAX_CREATEINSTANCE_OPS)) return SQ_ERROR;
/* The GetURL function is optional. */
if (info->engine->MethodExists(*info->SQ_instance, "GetURL")) {
if (!info->engine->CallStringMethodStrdup(*info->SQ_instance, "GetURL", &info->url, MAX_GET_OPS)) return SQ_ERROR;
}
return 0;
}
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