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Fix 991a797: [Script] Allow STRINGN consumption to be different than expected

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glx22 2023-04-02 00:47:36 +02:00 committed by Loïc Guilloux
parent 43cea852a6
commit 3a48d6e60f
1 changed files with 52 additions and 20 deletions
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72
src/script/api/script_text.cpp
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@ -12,6 +12,7 @@
#include "../../strings_func.h"
#include "../../game/game_text.hpp"
#include "script_text.hpp"
#include "script_log.hpp"
#include "../script_fatalerror.hpp"
#include "../../table/control_codes.h"
@ -179,31 +180,62 @@ char *ScriptText::_GetEncodedText(char *p, char *lastofp, int &param_count, Stri
const StringParams &params = GetGameStringParams(this->string);
int cur_idx = 0;
int prev_string = -1;
int prev_idx = -1;
int prev_count = -1;
for (const StringParam &cur_param : params) {
if (cur_idx >= this->paramc) throw Script_FatalError(fmt::format("{}: Not enough parameters", name));
switch (cur_param.type) {
case StringParam::RAW_STRING:
if (!std::holds_alternative<std::string>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects a raw string", name, cur_idx));
p += seprintf(p, lastofp, ":\"%s\"", std::get<std::string>(this->param[cur_idx++]).c_str());
break;
case StringParam::STRING: {
if (!std::holds_alternative<ScriptTextRef>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects a substring", name, cur_idx));
int count = 1; // 1 because the string id is included in consumed parameters
p += seprintf(p, lastofp, ":");
p = std::get<ScriptTextRef>(this->param[cur_idx++])->_GetEncodedText(p, lastofp, count, seen_ids);
if (count != cur_param.consumes) throw Script_FatalError(fmt::format("{}: Parameter {} substring consumes {}, but expected {} to be consumed", name, cur_idx, count - 1, cur_param.consumes - 1));
break;
}
default:
if (cur_idx + cur_param.consumes > this->paramc) throw Script_FatalError(fmt::format("{}: Not enough parameters", name));
for (int i = 0; i < cur_param.consumes; i++) {
if (!std::holds_alternative<SQInteger>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects an integer", name, cur_idx));
p += seprintf(p, lastofp,":" OTTD_PRINTFHEX64, std::get<SQInteger>(this->param[cur_idx++]));
if (prev_string != -1) {
/* The previous substring added more parameters than expected, means we will consume them but can't properly validate them. */
for (int i = 0; i < cur_param.consumes; i++) {
if (prev_idx < prev_count) {
ScriptLog::Warning(fmt::format("{}: Parameter {} uses parameter {} from substring {} and cannot be validated", name, param_count + i, prev_idx++, prev_string).c_str());
} else {
/* No more extra parameters, assume SQInteger are expected. */
if (cur_idx >= this->paramc) throw Script_FatalError(fmt::format("{}: Not enough parameters", name));
if (!std::holds_alternative<SQInteger>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects an integer", name, param_count + i));
p += seprintf(p, lastofp, ":" OTTD_PRINTFHEX64, std::get<SQInteger>(this->param[cur_idx++]));
}
}
if (prev_idx == prev_count) {
/* Re-enable validation. */
prev_string = -1;
}
} else {
switch (cur_param.type) {
case StringParam::RAW_STRING:
if (!std::holds_alternative<std::string>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects a raw string", name, param_count));
p += seprintf(p, lastofp, ":\"%s\"", std::get<std::string>(this->param[cur_idx++]).c_str());
break;
case StringParam::STRING: {
if (!std::holds_alternative<ScriptTextRef>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects a substring", name, param_count));
int count = 0;
p += seprintf(p, lastofp, ":");
p = std::get<ScriptTextRef>(this->param[cur_idx++])->_GetEncodedText(p, lastofp, count, seen_ids);
if (++count != cur_param.consumes) {
ScriptLog::Error(fmt::format("{}: Parameter {} substring consumes {}, but expected {} to be consumed", name, param_count, count - 1, cur_param.consumes - 1).c_str());
/* Fill missing params if needed. */
for (int i = count; i < cur_param.consumes; i++) p += seprintf(p, lastofp, ":0");
/* Disable validation for the extra params if any. */
if (count > cur_param.consumes) {
prev_string = param_count;
prev_idx = cur_param.consumes - 1;
prev_count = count - 1;
}
}
break;
}
default:
if (cur_idx + cur_param.consumes > this->paramc) throw Script_FatalError(fmt::format("{}: Not enough parameters", name));
for (int i = 0; i < cur_param.consumes; i++) {
if (!std::holds_alternative<SQInteger>(this->param[cur_idx])) throw Script_FatalError(fmt::format("{}: Parameter {} expects an integer", name, param_count + i));
p += seprintf(p, lastofp, ":" OTTD_PRINTFHEX64, std::get<SQInteger>(this->param[cur_idx++]));
}
}
}
param_count += cur_param.consumes;