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comparison libcommon/gsm7_decode.c @ 21:d4dc86195382

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GSM7 quoted string output factored out, uses new escapes
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 Feb 2021 04:16:35 +0000
parents libcommon/alpha_decode.c@f7145c77b7fb
children
comparison
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20:90e7020df08a 21:d4dc86195382
1 /*
2 * This module contains functions for decoding GSM7 strings
3 * that exist in various SIM files.
4 */
5
6 #include <sys/types.h>
7 #include <stdio.h>
8
9 static char gsm7_decode_table[128] = {
10 '@', 0, '$', 0, 0, 0, 0, 0,
11 0, 0, '\n', 0, 0, '\r', 0, 0,
12 0, '_', 0, 0, 0, 0, 0, 0,
13 0, 0, 0, 0, 0, 0, 0, 0,
14 ' ', '!', '"', '#', 0, '%', '&', 0x27,
15 '(', ')', '*', '+', ',', '-', '.', '/',
16 '0', '1', '2', '3', '4', '5', '6', '7',
17 '8', '9', ':', ';', '<', '=', '>', '?',
18 0, 'A', 'B', 'C', 'D', 'E', 'F', 'G',
19 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
20 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
21 'X', 'Y', 'Z', 0, 0, 0, 0, 0,
22 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g',
23 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
24 'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
25 'x', 'y', 'z', 0, 0, 0, 0, 0
26 };
27
28 static char gsm7ext_decode_table[128] = {
29 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
30 0, 0, 0, 0, '^', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
31 0, 0, 0, 0, 0, 0, 0, 0, '{', '}', 0, 0, 0, 0, 0, '\\',
32 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '[', '~', ']', 0,
33 '|', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
34 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
35 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
36 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
37 };
38
39 void
40 print_gsm7_string_to_file(data, nbytes, outf)
41 u_char *data;
42 unsigned nbytes;
43 FILE *outf;
44 {
45 u_char *dp, *endp;
46 int b, c;
47
48 dp = data;
49 endp = data + nbytes;
50 putc('"', outf);
51 while (dp < endp) {
52 b = *dp++;
53 if (b == 0x1B) {
54 if (dp >= endp || *dp == 0x1B || *dp == '\n' ||
55 *dp == '\r') {
56 putc('\\', outf);
57 putc('e', outf);
58 continue;
59 }
60 b = *dp++;
61 c = gsm7ext_decode_table[b];
62 if (!c) {
63 fprintf(outf, "\\e\\%02X", b);
64 continue;
65 }
66 } else {
67 c = gsm7_decode_table[b];
68 if (!c) {
69 fprintf(outf, "\\%02X", b);
70 continue;
71 }
72 }
73 if (c == '\n') {
74 putc('\\', outf);
75 putc('n', outf);
76 continue;
77 }
78 if (c == '\r') {
79 putc('\\', outf);
80 putc('r', outf);
81 continue;
82 }
83 if (c == '"' || c == '\\')
84 putc('\\', outf);
85 putc(c, outf);
86 }
87 putc('"', outf);
88 }