FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/grokdcs.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents 097ce8431d11
children
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097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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1 /*
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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2 * This library module implements the function that distills the complex
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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3 * set of possible SMS DCS octet values to just one of 4 possibilities:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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4 * 7-bit text (7), 8-bit data octets (8), UCS-2 text (16) or compressed
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5 * data (9).
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6 *
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7 * The decoding is based on the 3GPP TS 23.038 V11.0.0 spec;
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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8 * reserved encodings are treated as 7-bit text as the spec instructs.
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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9 */
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10
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11 sms_dcs_classify(dcs)
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12 {
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13 if (!(dcs & 0x80)) {
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14 if (dcs & 0x20)
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15 return(9);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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16 switch (dcs & 0xC) {
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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17 case 0:
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18 return(7);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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19 case 4:
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20 return(8);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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21 case 8:
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22 return(16);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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23 default:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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24 /* reserved, treating as 7-bit per the spec */
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25 return(7);
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26 }
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27 }
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28 switch (dcs & 0xF0) {
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29 case 0x80:
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30 case 0x90:
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31 case 0xA0:
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32 case 0xB0:
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33 /* reserved, treating as 7-bit per the spec */
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34 return(7);
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35 case 0xC0:
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36 case 0xD0:
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37 return(7);
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38 case 0xE0:
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39 return(16);
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40 case 0xF0:
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41 if (dcs & 4)
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42 return(8);
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43 else
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
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44 return(7);
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45 }
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46 }