FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/gsmtime.c @ 846:a2e17e0f9622
CHANGES: document fc-tmsync mpr & madc command additions
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 31 Jul 2021 22:37:34 +0000 |
parents | f40530e2d48d |
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uptools/libcoding: GSM timestamp decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * This library module implements decoding of GSM timestamps. |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <stdio.h> |
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7 |
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8 gsm_timestamp_decode(inbuf, outbuf) |
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9 u_char *inbuf; |
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10 char *outbuf; |
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11 { |
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12 u_char rev[7]; |
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13 int i, d1, d2, tzsign; |
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14 |
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15 for (i = 0; i < 7; i++) { |
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16 d1 = inbuf[i] & 0xF; |
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17 d2 = inbuf[i] >> 4; |
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18 rev[i] = (d1 << 4) | d2; |
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19 } |
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20 if (rev[6] & 0x80) { |
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21 rev[6] &= 0x7F; |
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22 tzsign = '-'; |
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23 } else |
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24 tzsign = '+'; |
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25 sprintf(outbuf, "%02X/%02X/%02X,%02X:%02X:%02X%c%02X", rev[0], rev[1], |
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26 rev[2], rev[3], rev[4], rev[5], tzsign, rev[6]); |
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27 } |