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Fix bf4b6696: [Script] Broken ScriptText circular reference detection (#12187)

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Loïc Guilloux 2024-02-27 18:16:21 +01:00 committed by GitHub
parent 2fb1593550
commit f612bc6ee2
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2 changed files with 18 additions and 17 deletions
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24
src/script/api/script_text.cpp
View File

@ -160,25 +160,30 @@ SQInteger ScriptText::_set(HSQUIRRELVM vm)
std::string ScriptText::GetEncodedText()
{
StringIDList seen_ids;
ScriptTextList seen_texts;
ParamList params;
int param_count = 0;
std::string result;
auto output = std::back_inserter(result);
this->_FillParamList(params);
this->_GetEncodedText(output, param_count, seen_ids, params);
this->_FillParamList(params, seen_texts);
this->_GetEncodedText(output, param_count, params);
if (param_count > SCRIPT_TEXT_MAX_PARAMETERS) throw Script_FatalError(fmt::format("{}: Too many parameters", GetGameStringName(this->string)));
return result;
}
void ScriptText::_FillParamList(ParamList &params)
void ScriptText::_FillParamList(ParamList &params, ScriptTextList &seen_texts)
{
if (std::find(seen_texts.begin(), seen_texts.end(), this) != seen_texts.end()) throw Script_FatalError(fmt::format("{}: Circular reference detected", GetGameStringName(this->string)));
seen_texts.push_back(this);
for (int i = 0; i < this->paramc; i++) {
Param *p = &this->param[i];
params.emplace_back(this->string, i, p);
if (!std::holds_alternative<ScriptTextRef>(*p)) continue;
std::get<ScriptTextRef>(*p)->_FillParamList(params);
std::get<ScriptTextRef>(*p)->_FillParamList(params, seen_texts);
}
seen_texts.pop_back();
}
void ScriptText::ParamCheck::Encode(std::back_insert_iterator<std::string> &output)
@ -190,13 +195,10 @@ void ScriptText::ParamCheck::Encode(std::back_insert_iterator<std::string> &outp
this->used = true;
}
void ScriptText::_GetEncodedText(std::back_insert_iterator<std::string> &output, int &param_count, StringIDList &seen_ids, ParamSpan args)
void ScriptText::_GetEncodedText(std::back_insert_iterator<std::string> &output, int &param_count, ParamSpan args)
{
const std::string &name = GetGameStringName(this->string);
if (std::find(seen_ids.begin(), seen_ids.end(), this->string) != seen_ids.end()) throw Script_FatalError(fmt::format("{}: Circular reference detected", name));
seen_ids.push_back(this->string);
Utf8Encode(output, SCC_ENCODED);
fmt::format_to(output, "{:X}", this->string);
@ -234,7 +236,7 @@ void ScriptText::_GetEncodedText(std::back_insert_iterator<std::string> &output,
int count = 0;
fmt::format_to(output, ":");
ScriptTextRef &ref = std::get<ScriptTextRef>(*p.param);
ref->_GetEncodedText(output, count, seen_ids, args.subspan(idx));
ref->_GetEncodedText(output, count, args.subspan(idx));
p.used = true;
if (++count != cur_param.consumes) {
ScriptLog::Error(fmt::format("{}({}): {{{}}} expects {} to be consumed, but {} consumes {}", name, param_count + 1, cur_param.cmd, cur_param.consumes - 1, GetGameStringName(ref->string), count - 1));
@ -255,8 +257,6 @@ void ScriptText::_GetEncodedText(std::back_insert_iterator<std::string> &output,
param_count += cur_param.consumes;
}
seen_ids.pop_back();
}
const std::string Text::GetDecodedText()

11
src/script/api/script_text.hpp
View File

@ -129,7 +129,7 @@ public:
private:
using ScriptTextRef = ScriptObjectRef<ScriptText>;
using StringIDList = std::vector<StringID>;
using ScriptTextList = std::vector<ScriptText *>;
using Param = std::variant<SQInteger, std::string, ScriptTextRef>;
struct ParamCheck {
@ -155,17 +155,18 @@ private:
* The parameters are added as _GetEncodedText used to encode them
* before the addition of parameter validation.
* @param params The list of parameters to fill.
* @param seen_texts The list of seen ScriptText.
*/
void _FillParamList(ParamList &params);
void _FillParamList(ParamList &params, ScriptTextList &seen_texts);
/**
* Internal function for recursive calling this function over multiple
* instances, while writing in the same buffer.
* @param output The output to write the encoded text to.
* @param param_count The number of parameters that are in the string.
* @param seen_ids The list of seen StringID.
* @param param_count The number of parameters that are consumed by the string.
* @param args The parameters to be consumed.
*/
void _GetEncodedText(std::back_insert_iterator<std::string> &output, int &param_count, StringIDList &seen_ids, ParamSpan args);
void _GetEncodedText(std::back_insert_iterator<std::string> &output, int &param_count, ParamSpan args);
/**
* Set a parameter, where the value is the first item on the stack.