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Merge pull request #11846 from german77/cheats

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cheats: Clamp cheat names without failing
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liamwhite 2023-10-23 10:33:37 -04:00 committed by GitHub
commit 1cc764988f
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 16 additions and 7 deletions
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23
src/core/memory/cheat_engine.cpp
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@ -19,16 +19,23 @@ namespace Core::Memory {
namespace {
constexpr auto CHEAT_ENGINE_NS = std::chrono::nanoseconds{1000000000 / 12};
std::string_view ExtractName(std::string_view data, std::size_t start_index, char match) {
std::string_view ExtractName(std::size_t& out_name_size, std::string_view data,
std::size_t start_index, char match) {
auto end_index = start_index;
while (data[end_index] != match) {
++end_index;
if (end_index > data.size() ||
(end_index - start_index - 1) > sizeof(CheatDefinition::readable_name)) {
if (end_index > data.size()) {
return {};
}
}
out_name_size = end_index - start_index;
// Clamp name if it's too big
if (out_name_size > sizeof(CheatDefinition::readable_name)) {
end_index = start_index + sizeof(CheatDefinition::readable_name);
}
return data.substr(start_index, end_index - start_index);
}
} // Anonymous namespace
@ -113,7 +120,8 @@ std::vector<CheatEntry> TextCheatParser::Parse(std::string_view data) const {
return {};
}
const auto name = ExtractName(data, i + 1, '}');
std::size_t name_size{};
const auto name = ExtractName(name_size, data, i + 1, '}');
if (name.empty()) {
return {};
}
@ -125,12 +133,13 @@ std::vector<CheatEntry> TextCheatParser::Parse(std::string_view data) const {
.definition.readable_name[out[*current_entry].definition.readable_name.size() - 1] =
'\0';
i += name.length() + 1;
i += name_size + 1;
} else if (data[i] == '[') {
current_entry = out.size();
out.emplace_back();
const auto name = ExtractName(data, i + 1, ']');
std::size_t name_size{};
const auto name = ExtractName(name_size, data, i + 1, ']');
if (name.empty()) {
return {};
}
@ -142,7 +151,7 @@ std::vector<CheatEntry> TextCheatParser::Parse(std::string_view data) const {
.definition.readable_name[out[*current_entry].definition.readable_name.size() - 1] =
'\0';
i += name.length() + 1;
i += name_size + 1;
} else if (::isxdigit(data[i])) {
if (!current_entry || out[*current_entry].definition.num_opcodes >=
out[*current_entry].definition.opcodes.size()) {