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setsys_settings_items: Less resource churn with combined key/value construction

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The previous string construction discards two temporary std::string
instances (operator+ returns by value, not by reference), and creates a
std::string that it doesn't need to (the one around key). Instead we can
just append to the end of the initial std::string itself, saving on two
unnecessary created strings.

append() has a const char* overload as well (as does operator+), so we
can just append the key string as is without creating an entire new
string.
This commit is contained in:
Lioncash 2019-06-03 20:57:52 -04:00
parent 452c61db7a
commit dd10547ac2
1 changed files with 10 additions and 10 deletions
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6
stratosphere/ams_mitm/source/set_mitm/setsys_settings_items.cpp
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@ -154,7 +154,7 @@ static Result ParseValue(const char *name, const char *key, const char *val_tup)
return ResultSettingsItemValueInvalidFormat; return ResultSettingsItemValueInvalidFormat;
} }
std::string kv = std::string(name) + "!" + std::string(key); std::string kv = std::string(name).append("!").append(key);
SettingsItemValue value; SettingsItemValue value;
if (strncasecmp(type, "str", type_len) == 0 || strncasecmp(type, "string", type_len) == 0) { if (strncasecmp(type, "str", type_len) == 0 || strncasecmp(type, "string", type_len) == 0) {
@ -275,7 +275,7 @@ void SettingsItemManager::LoadConfiguration() {
} }
Result SettingsItemManager::GetValueSize(const char *name, const char *key, u64 *out_size) { Result SettingsItemManager::GetValueSize(const char *name, const char *key, u64 *out_size) {
std::string kv = std::string(name) + "!" + std::string(key); const std::string kv = std::string(name).append("!").append(key);
auto it = g_settings_items.find(kv); auto it = g_settings_items.find(kv);
if (it == g_settings_items.end()) { if (it == g_settings_items.end()) {
@ -287,7 +287,7 @@ Result SettingsItemManager::GetValueSize(const char *name, const char *key, u64
} }
Result SettingsItemManager::GetValue(const char *name, const char *key, void *out, size_t max_size, u64 *out_size) { Result SettingsItemManager::GetValue(const char *name, const char *key, void *out, size_t max_size, u64 *out_size) {
std::string kv = std::string(name) + "!" + std::string(key); const std::string kv = std::string(name).append("!").append(key);
auto it = g_settings_items.find(kv); auto it = g_settings_items.find(kv);
if (it == g_settings_items.end()) { if (it == g_settings_items.end()) {