void GptPartitionTable::set_name(utils::ByteBuffer& bb, uint64_t _offset, const std::string& name) {
std::size_t offset = std::size_t(_offset);
auto chars_to_write = std::min(unsigned(name.size()), GPT_PARTITION_NAME_SIZE / 2);
for (unsigned i = 0; i < chars_to_write; ++i) {
bb.set_le16(offset + i * 2, uint16_t(name[i]));
}
// fill remaining bytes with zeros
for (unsigned i = chars_to_write; i < GPT_PARTITION_NAME_SIZE / 2; ++i) {
bb.set_le16(offset + i * 2, 0);
}
}
void GptPartitionTable::set_guid(utils::ByteBuffer& bb, uint64_t _offset, const std::string& guid) {
std::size_t offset = std::size_t(_offset);
static constexpr unsigned EXPECTED_MATCHES = 6;
static constexpr int HEX_BASE = 16;
std::regex expr("([0-9a-fA-F]{8})-([0-9a-fA-F]{4})-([0-9a-fA-F]{4})-([0-9a-fA-F]{4})-([0-9a-fA-F]{12})");
std::smatch match{};
if (!std::regex_match(guid, match, expr) || match.size() != EXPECTED_MATCHES) {
throw std::runtime_error(std::string{"Invalid GUID format: "} + guid);
}
bb.set_le32(offset + 0, uint32_t(std::stoul(match[1].str(), nullptr, HEX_BASE)));
bb.set_le16(offset + 4, uint16_t(std::stoul(match[2].str(), nullptr, HEX_BASE)));
bb.set_le16(offset + 6, uint16_t(std::stoul(match[3].str(), nullptr, HEX_BASE)));
bb.set_be16(offset + 8, uint16_t(std::stoul(match[4].str(), nullptr, HEX_BASE)));
bb.set_be48(offset + 10, std::stoull(match[5].str(), nullptr, HEX_BASE));
}