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Checking if emoji byte doesn't get out of bounds

This commit is contained in:
kraftwerk28 2021-11-24 02:13:40 +02:00
parent 59040c53e4
commit 89afa8e149
1 changed files with 10 additions and 5 deletions
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15
src/modules/sway/language.cpp
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@ -108,7 +108,8 @@ auto Language::update() -> void {
fmt::arg("short", layout_.short_name), fmt::arg("short", layout_.short_name),
fmt::arg("shortDescription", layout_.short_description), fmt::arg("shortDescription", layout_.short_description),
fmt::arg("long", layout_.full_name), fmt::arg("long", layout_.full_name),
fmt::arg("variant", layout_.variant))); fmt::arg("variant", layout_.variant),
fmt::arg("flag", layout_.country_flag())));
label_.set_tooltip_markup(tooltip_display_layout); label_.set_tooltip_markup(tooltip_display_layout);
} else { } else {
label_.set_tooltip_markup(display_layout); label_.set_tooltip_markup(display_layout);
@ -215,9 +216,13 @@ Language::XKBContext::~XKBContext() {
} }
std::string Language::Layout::country_flag() const { std::string Language::Layout::country_flag() const {
static std::string result = "\xf0\x9f\x87\xff\xf0\x9f\x87\xff"; if (short_name.size() != 2) return "";
result[3] = short_name[0] - 0xbb; unsigned char result[] = "\xf0\x9f\x87\x00\xf0\x9f\x87\x00";
result[7] = short_name[1] - 0xbb; result[3] = short_name[0] + 0x45;
return result; result[7] = short_name[1] + 0x45;
// Check if both emojis are in A-Z symbol bounds
if (result[3] < 0xa6 || result[3] > 0xbf) return "";
if (result[7] < 0xa6 || result[7] > 0xbf) return "";
return std::string{reinterpret_cast<char*>(result)};
} }
} // namespace waybar::modules::sway } // namespace waybar::modules::sway