FreeCalypso > hg > freecalypso-tools
annotate uptools/libcoding/gsm7_decode.c @ 802:1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 25 Mar 2021 02:58:30 +0000 |
parents | 978571e23318 |
children | 5637794913a8 |
rev | line source |
---|---|
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
1 /* |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
2 * This library module implements the decoding of GSM7-encoded data |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
3 * into ASCII, ISO 8859-1 or UTF-8. |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
4 */ |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
5 |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
6 #include <sys/types.h> |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
7 #include <stdio.h> |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
8 |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
9 extern u_short gsm7_decode_table[128]; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
10 extern u_short gsm7ext_decode_table[128]; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
11 |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
12 gsm7_to_ascii_or_ext(inbuf, inlen, outbuf, outlenp, ascii_ext, newline_ok, errp) |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
13 u_char *inbuf, *outbuf; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
14 unsigned inlen, *outlenp, *errp; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
15 { |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
16 u_char *inp, *endp, *outp; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
17 unsigned gsm, uni; |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
18 int is_ext; |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
19 |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
20 inp = inbuf; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
21 endp = inbuf + inlen; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
22 outp = outbuf; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
23 while (inp < endp) { |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
24 gsm = *inp++; |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
25 if (gsm == 0x1B && inp < endp && *inp != 0x1B && *inp != '\n' |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
26 && *inp != '\r') { |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
27 gsm = *inp++; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
28 uni = gsm7ext_decode_table[gsm]; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
29 if (uni == '\\') { |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
30 *outp++ = '\\'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
31 *outp++ = '\\'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
32 continue; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
33 } |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
34 is_ext = 1; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
35 } else { |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
36 switch (gsm) { |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
37 case 0x1B: |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
38 *outp++ = '\\'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
39 *outp++ = 'e'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
40 continue; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
41 case '\n': |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
42 if (newline_ok) |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
43 *outp++ = '\n'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
44 else { |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
45 *outp++ = '\\'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
46 *outp++ = 'n'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
47 } |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
48 continue; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
49 case '\r': |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
50 *outp++ = '\\'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
51 *outp++ = 'r'; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
52 continue; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
53 } |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
54 uni = gsm7_decode_table[gsm]; |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
55 is_ext = 0; |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
56 } |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
57 if (!uni || !is_decoded_char_ok(uni, ascii_ext)) { |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
58 if (is_ext) { |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
59 *outp++ = '\\'; |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
60 *outp++ = 'e'; |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
61 } |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
62 sprintf(outp, "\\%02X", gsm); |
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
63 outp += 3; |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
64 } else if (ascii_ext == 2) |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
65 outp += emit_utf8_char(uni, outp); |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
66 else |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
67 *outp++ = uni; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
68 } |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
69 *outp = '\0'; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
70 if (outlenp) |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
71 *outlenp = outp - outbuf; |
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
72 if (errp) |
802
1c599681fd60
pcm-sms-decode & sms-pdu-decode: revamp bad char decoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
328
diff
changeset
|
73 *errp = 0; |
328
978571e23318
uptools started with libcoding
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff
changeset
|
74 } |