FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/grokdcs.c @ 921:74d284add54d

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fc-fsio: guard against bogus readdir results from the target If the FFS being operated on contains SE K2x0 extended filenames, readdir will return strings that are bad for printing. We need to guard against this possibility, and also against possible other bogosity that could be sent by other alien firmwares.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 31 Dec 2022 22:55:23 +0000
parents 097ce8431d11
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
335
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This library module implements the function that distills the complex
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * set of possible SMS DCS octet values to just one of 4 possibilities:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * 7-bit text (7), 8-bit data octets (8), UCS-2 text (16) or compressed
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * data (9).
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 *
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 * The decoding is based on the 3GPP TS 23.038 V11.0.0 spec;
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 * reserved encodings are treated as 7-bit text as the spec instructs.
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 */
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 sms_dcs_classify(dcs)
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 {
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 if (!(dcs & 0x80)) {
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 if (dcs & 0x20)
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 return(9);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 switch (dcs & 0xC) {
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 case 0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 return(7);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 case 4:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 return(8);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 case 8:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 return(16);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 default:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 /* reserved, treating as 7-bit per the spec */
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 return(7);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 }
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 }
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 switch (dcs & 0xF0) {
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 case 0x80:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 case 0x90:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 case 0xA0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 case 0xB0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 /* reserved, treating as 7-bit per the spec */
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 return(7);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 case 0xC0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 case 0xD0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 return(7);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 case 0xE0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 return(16);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 case 0xF0:
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 if (dcs & 4)
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 return(8);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 else
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 return(7);
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 }
097ce8431d11 uptools/libcoding: SMS DCS decoding implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 }