FreeCalypso > hg > sms-coding-utils
comparison libcoding/gsmtime_dec.c @ 28:6e925aa54727
libcoding: more sensible naming of GSM time
encoding and decoding modules
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 13 Jun 2024 02:32:11 +0000 |
parents | libcoding/gsmtime.c@7418ca2e9949 |
children |
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27:7418ca2e9949 | 28:6e925aa54727 |
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1 /* | |
2 * This library module implements decoding of GSM timestamps. | |
3 */ | |
4 | |
5 #include <sys/types.h> | |
6 #include <stdio.h> | |
7 | |
8 gsm_timestamp_decode(inbuf, outbuf) | |
9 u_char *inbuf; | |
10 char *outbuf; | |
11 { | |
12 u_char rev[7]; | |
13 int i, d1, d2, tzsign; | |
14 | |
15 for (i = 0; i < 7; i++) { | |
16 d1 = inbuf[i] & 0xF; | |
17 d2 = inbuf[i] >> 4; | |
18 rev[i] = (d1 << 4) | d2; | |
19 } | |
20 if (rev[6] & 0x80) { | |
21 rev[6] &= 0x7F; | |
22 tzsign = '-'; | |
23 } else | |
24 tzsign = '+'; | |
25 sprintf(outbuf, "%02X/%02X/%02X,%02X:%02X:%02X%c%02X", rev[0], rev[1], | |
26 rev[2], rev[3], rev[4], rev[5], tzsign, rev[6]); | |
27 } |