26 lines
912 B
C
26 lines
912 B
C
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#ifndef VOICELINK_BLE_NAME_H
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#define VOICELINK_BLE_NAME_H
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#include <stdio.h>
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#include <string.h>
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// Legacy scan response: 31 bytes minus AD length/type = 29 name bytes.
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// "vl-" (3) + model (<=17 UTF-8 bytes) + "-" (1) + ID (8).
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#define VOICELINK_BLE_NAME_CAPACITY 30
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static inline void voicelink_ble_name(char out[VOICELINK_BLE_NAME_CAPACITY],
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const char *model, const char *factory_id)
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{
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size_t model_len = strlen(model);
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if (model_len > 17) {
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model_len = 17;
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// Do not truncate inside a UTF-8 code point.
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while (model_len && ((unsigned char)model[model_len] & 0xc0) == 0x80)
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model_len--;
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}
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size_t id_len = strlen(factory_id);
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const char *suffix = id_len >= 8 ? factory_id + id_len - 8 : factory_id;
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snprintf(out, VOICELINK_BLE_NAME_CAPACITY, "vl-%.*s-%s",
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(int)model_len, model, suffix);
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}
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#endif
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