39 lines
1.0 KiB
C
39 lines
1.0 KiB
C
/* (C) András Wiesner, 2020-2022 */
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#include <flexptp/format_utils.h>
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#include <stdint.h>
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// lookup table for log msg. period to ms conversion (ms values are floor-rounded)
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#define LOG_INTERVAL_LOOKUP_OFFSET (6)
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static uint16_t sLogIntervalMs[] = { 15, 31, 62, 125, 250, 500, 1000, 2000, 4000, 8000, 0 }; // terminating zero as last element
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// log interval to milliseconds
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uint16_t ptp_logi2ms(int8_t logi)
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{
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return sLogIntervalMs[logi + LOG_INTERVAL_LOOKUP_OFFSET];
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}
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// milliseconds to log interval
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int8_t ptp_ms2logi(uint16_t ms)
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{
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uint16_t *pIter = sLogIntervalMs;
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while (*pIter != 0) {
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if (*pIter == ms) {
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break;
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}
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}
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return (int8_t) (pIter - sLogIntervalMs) + LOG_INTERVAL_LOOKUP_OFFSET;
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}
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// Network->Host byte order conversion for 64-bit values
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uint64_t ntohll(uint64_t in)
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{
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unsigned char out[8] = { in >> 56, in >> 48, in >> 40, in >> 32, in >> 24, in >> 16, in >> 8, in };
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return *(uint64_t *) out;
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}
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uint64_t htonll(uint64_t in)
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{
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return ntohll(in);
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}
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