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[esp32_ble] Refactor ESPBTUUID::from_raw to use parse_hex helpers

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This commit is contained in:
J. Nick Koston
2025-10-06 12:12:28 -05:00
parent abeadc7830
commit c2d75bf29a
1 changed files with 10 additions and 24 deletions
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34
esphome/components/esp32_ble/ble_uuid.cpp
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@@ -42,32 +42,18 @@ ESPBTUUID ESPBTUUID::from_raw_reversed(const uint8_t *data) {
ESPBTUUID ESPBTUUID::from_raw(const std::string &data) {
ESPBTUUID ret;
if (data.length() == 4) {
ret.uuid_.len = ESP_UUID_LEN_16;
ret.uuid_.uuid.uuid16 = 0;
for (uint i = 0; i < data.length(); i += 2) {
uint8_t msb = data.c_str()[i];
uint8_t lsb = data.c_str()[i + 1];
uint8_t lsb_shift = i <= 2 ? (2 - i) * 4 : 0;
if (msb > '9')
msb -= 7;
if (lsb > '9')
lsb -= 7;
ret.uuid_.uuid.uuid16 += (((msb & 0x0F) << 4) | (lsb & 0x0F)) << lsb_shift;
// 16-bit UUID as 4-character hex string
auto parsed = parse_hex<uint16_t>(data);
if (parsed.has_value()) {
ret.uuid_.len = ESP_UUID_LEN_16;
ret.uuid_.uuid.uuid16 = parsed.value();
}
} else if (data.length() == 8) {
ret.uuid_.len = ESP_UUID_LEN_32;
ret.uuid_.uuid.uuid32 = 0;
for (uint i = 0; i < data.length(); i += 2) {
uint8_t msb = data.c_str()[i];
uint8_t lsb = data.c_str()[i + 1];
uint8_t lsb_shift = i <= 6 ? (6 - i) * 4 : 0;
if (msb > '9')
msb -= 7;
if (lsb > '9')
lsb -= 7;
ret.uuid_.uuid.uuid32 += (((msb & 0x0F) << 4) | (lsb & 0x0F)) << lsb_shift;
// 32-bit UUID as 8-character hex string
auto parsed = parse_hex<uint32_t>(data);
if (parsed.has_value()) {
ret.uuid_.len = ESP_UUID_LEN_32;
ret.uuid_.uuid.uuid32 = parsed.value();
}
} else if (data.length() == 16) { // how we can have 16 byte length string reprezenting 128 bit uuid??? needs to be
// investigated (lack of time)