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Location: cpp/openttd-patchpack/source/src/script/script_scanner.cpp - annotation
r25256:9aa975c3b919
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Add: ask for confirmation on admin actions in network games
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r24500:deda806a71a7 r24500:deda806a71a7 r18508:f893337ab5c7 r18508:f893337ab5c7 r18508:f893337ab5c7 r18508:f893337ab5c7 r19556:51f34458ed8a r19556:51f34458ed8a r24500:deda806a71a7 r24500:deda806a71a7 r19556:51f34458ed8a r23607:36c15679007d r19556:51f34458ed8a | /*
* 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_scanner.cpp Allows scanning for scripts. */
#include "../stdafx.h"
#include "../debug.h"
#include "../string_func.h"
#include "../settings_type.h"
#include "../script/squirrel.hpp"
#include "script_scanner.hpp"
#include "script_info.hpp"
#include "script_fatalerror.hpp"
#include "../network/network_content.h"
#include "../3rdparty/md5/md5.h"
#include "../tar_type.h"
#include "../safeguards.h"
bool ScriptScanner::AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
{
this->main_script = filename;
this->tar_file = tar_filename;
auto p = this->main_script.rfind(PATHSEPCHAR);
this->main_script.erase(p != std::string::npos ? p + 1 : 0);
this->main_script += "main.nut";
if (!FioCheckFileExists(filename, this->subdir) || !FioCheckFileExists(this->main_script, this->subdir)) return false;
this->ResetEngine();
try {
this->engine->LoadScript(filename.c_str());
} catch (Script_FatalError &e) {
DEBUG(script, 0, "Fatal error '%s' when trying to load the script '%s'.", e.GetErrorMessage().c_str(), filename.c_str());
return false;
}
return true;
}
ScriptScanner::ScriptScanner() :
engine(nullptr)
{
}
void ScriptScanner::ResetEngine()
{
this->engine->Reset();
this->engine->SetGlobalPointer(this);
this->RegisterAPI(this->engine);
}
void ScriptScanner::Initialize(const char *name)
{
this->engine = new Squirrel(name);
this->RescanDir();
this->ResetEngine();
}
ScriptScanner::~ScriptScanner()
{
this->Reset();
delete this->engine;
}
void ScriptScanner::RescanDir()
{
/* Forget about older scans */
this->Reset();
/* Scan for scripts */
this->Scan(this->GetFileName(), this->GetDirectory());
}
void ScriptScanner::Reset()
{
for (const auto &item : this->info_list) {
free(item.first);
delete item.second;
}
for (const auto &item : this->info_single_list) {
free(item.first);
}
this->info_list.clear();
this->info_single_list.clear();
}
void ScriptScanner::RegisterScript(ScriptInfo *info)
{
char script_original_name[1024];
this->GetScriptName(info, script_original_name, lastof(script_original_name));
strtolower(script_original_name);
char script_name[1024];
seprintf(script_name, lastof(script_name), "%s.%d", script_original_name, info->GetVersion());
/* Check if GetShortName follows the rules */
if (strlen(info->GetShortName()) != 4) {
DEBUG(script, 0, "The script '%s' returned a string from GetShortName() which is not four characaters. Unable to load the script.", info->GetName());
delete info;
return;
}
if (this->info_list.find(script_name) != this->info_list.end()) {
/* This script was already registered */
#ifdef _WIN32
/* Windows doesn't care about the case */
if (strcasecmp(this->info_list[script_name]->GetMainScript(), info->GetMainScript()) == 0) {
#else
if (strcmp(this->info_list[script_name]->GetMainScript(), info->GetMainScript()) == 0) {
#endif
delete info;
return;
}
DEBUG(script, 1, "Registering two scripts with the same name and version");
DEBUG(script, 1, " 1: %s", this->info_list[script_name]->GetMainScript());
DEBUG(script, 1, " 2: %s", info->GetMainScript());
DEBUG(script, 1, "The first is taking precedence.");
delete info;
return;
}
this->info_list[stredup(script_name)] = info;
if (!info->IsDeveloperOnly() || _settings_client.gui.ai_developer_tools) {
/* Add the script to the 'unique' script list, where only the highest version
* of the script is registered. */
if (this->info_single_list.find(script_original_name) == this->info_single_list.end()) {
this->info_single_list[stredup(script_original_name)] = info;
} else if (this->info_single_list[script_original_name]->GetVersion() < info->GetVersion()) {
this->info_single_list[script_original_name] = info;
}
}
}
char *ScriptScanner::GetConsoleList(char *p, const char *last, bool newest_only) const
{
p += seprintf(p, last, "List of %s:\n", this->GetScannerName());
const ScriptInfoList &list = newest_only ? this->info_single_list : this->info_list;
for (const auto &item : list) {
ScriptInfo *i = item.second;
p += seprintf(p, last, "%10s (v%d): %s\n", i->GetName(), i->GetVersion(), i->GetDescription());
}
p += seprintf(p, last, "\n");
return p;
}
/** Helper for creating a MD5sum of all files within of a script. */
struct ScriptFileChecksumCreator : FileScanner {
byte md5sum[16]; ///< The final md5sum.
Subdirectory dir; ///< The directory to look in.
/**
* Initialise the md5sum to be all zeroes,
* so we can easily xor the data.
*/
ScriptFileChecksumCreator(Subdirectory dir)
{
this->dir = dir;
memset(this->md5sum, 0, sizeof(this->md5sum));
}
/* Add the file and calculate the md5 sum. */
virtual bool AddFile(const std::string &filename, size_t basepath_length, const std::string &tar_filename)
{
Md5 checksum;
uint8 buffer[1024];
size_t len, size;
byte tmp_md5sum[16];
/* Open the file ... */
FILE *f = FioFOpenFile(filename.c_str(), "rb", this->dir, &size);
if (f == nullptr) return false;
/* ... calculate md5sum... */
while ((len = fread(buffer, 1, (size > sizeof(buffer)) ? sizeof(buffer) : size, f)) != 0 && size != 0) {
size -= len;
checksum.Append(buffer, len);
}
checksum.Finish(tmp_md5sum);
FioFCloseFile(f);
/* ... and xor it to the overall md5sum. */
for (uint i = 0; i < sizeof(md5sum); i++) this->md5sum[i] ^= tmp_md5sum[i];
return true;
}
};
/**
* Check whether the script given in info is the same as in ci based
* on the shortname and md5 sum.
* @param ci The information to compare to.
* @param md5sum Whether to check the MD5 checksum.
* @param info The script to get the shortname and md5 sum from.
* @return True iff they're the same.
*/
static bool IsSameScript(const ContentInfo *ci, bool md5sum, ScriptInfo *info, Subdirectory dir)
{
uint32 id = 0;
const char *str = info->GetShortName();
for (int j = 0; j < 4 && *str != '\0'; j++, str++) id |= *str << (8 * j);
if (id != ci->unique_id) return false;
if (!md5sum) return true;
ScriptFileChecksumCreator checksum(dir);
auto tar_filename = info->GetTarFile();
TarList::iterator iter;
if (!tar_filename.empty() && (iter = _tar_list[dir].find(tar_filename)) != _tar_list[dir].end()) {
/* The main script is in a tar file, so find all files that
* are in the same tar and add them to the MD5 checksumming. */
TarFileList::iterator tar;
FOR_ALL_TARS(tar, dir) {
/* Not in the same tar. */
if (tar->second.tar_filename != iter->first) continue;
/* Check the extension. */
const char *ext = strrchr(tar->first.c_str(), '.');
if (ext == nullptr || strcasecmp(ext, ".nut") != 0) continue;
checksum.AddFile(tar->first, 0, tar_filename);
}
} else {
char path[MAX_PATH];
strecpy(path, info->GetMainScript(), lastof(path));
/* There'll always be at least 1 path separator character in a script
* main script name as the search algorithm requires the main script to
* be in a subdirectory of the script directory; so <dir>/<path>/main.nut. */
*strrchr(path, PATHSEPCHAR) = '\0';
checksum.Scan(".nut", path);
}
return memcmp(ci->md5sum, checksum.md5sum, sizeof(ci->md5sum)) == 0;
}
bool ScriptScanner::HasScript(const ContentInfo *ci, bool md5sum)
{
for (const auto &item : this->info_list) {
if (IsSameScript(ci, md5sum, item.second, this->GetDirectory())) return true;
}
return false;
}
const char *ScriptScanner::FindMainScript(const ContentInfo *ci, bool md5sum)
{
for (const auto &item : this->info_list) {
if (IsSameScript(ci, md5sum, item.second, this->GetDirectory())) return item.second->GetMainScript();
}
return nullptr;
}
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