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annotate uptools/libcoding/gsmtime.c @ 928:65953c172f24

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rvinterf/lowlevel: new hex dump format
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 05:23:19 +0000
parents f40530e2d48d
children
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334
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
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1 /*
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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2 * This library module implements decoding of GSM timestamps.
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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3 */
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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4
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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5 #include <sys/types.h>
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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6 #include <stdio.h>
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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7
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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8 gsm_timestamp_decode(inbuf, outbuf)
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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9 u_char *inbuf;
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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10 char *outbuf;
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11 {
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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12 u_char rev[7];
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13 int i, d1, d2, tzsign;
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14
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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15 for (i = 0; i < 7; i++) {
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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16 d1 = inbuf[i] & 0xF;
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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17 d2 = inbuf[i] >> 4;
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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18 rev[i] = (d1 << 4) | d2;
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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19 }
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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20 if (rev[6] & 0x80) {
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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21 rev[6] &= 0x7F;
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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22 tzsign = '-';
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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23 } else
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24 tzsign = '+';
f40530e2d48d uptools/libcoding: GSM timestamp decoding implemented
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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 }