FreeCalypso > hg > fc-pcsc-tools

comparison libcommon/gsm7_encode.c @ 17:b8d27c72747a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
GSM7 encoding function factored out of pb-update-imm
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 12 Feb 2021 02:54:17 +0000
parents simtool/pbupd_imm.c@d4f8c511affe
children 90e7020df08a
comparison
equal deleted inserted replaced
16:a6ca422323b9 17:b8d27c72747a
1 /*
2 * This module implements functions for parsing quoted string
3 * arguments intended for GSM7 string encoding, and actually
4 * encoding them into GSM7 binary strings.
5 */
6
7 #include <sys/types.h>
8 #include <ctype.h>
9 #include <stdio.h>
10
11 extern u_char gsm7_encode_table[256];
12
13 qstring_arg_to_gsm7(arg, record, maxlen)
14 char *arg;
15 u_char *record;
16 unsigned maxlen;
17 {
18 unsigned acclen, nadd;
19 char *cp;
20 int c;
21
22 cp = arg;
23 for (acclen = 0; *cp; ) {
24 c = *cp++;
25 if (c == '\\') {
26 if (*cp == '\0') {
27 fprintf(stderr,
28 "error: dangling backslash escape\n");
29 return(-1);
30 }
31 c = *cp++;
32 switch (c) {
33 case 'n':
34 c = '\n';
35 break;
36 case 'r':
37 c = '\r';
38 break;
39 case '"':
40 case '\\':
41 break;
42 default:
43 fprintf(stderr,
44 "error: non-understood backslash escape\n");
45 return(-1);
46 }
47 }
48 c = gsm7_encode_table[c];
49 if (c == 0xFF) {
50 fprintf(stderr,
51 "error: character in alpha tag string cannot be encoded in GSM7\n");
52 return(-1);
53 }
54 if (c & 0x80)
55 nadd = 2;
56 else
57 nadd = 1;
58 if (acclen + nadd > maxlen) {
59 fprintf(stderr,
60 "error: alpha tag string is longer than SIM limit\n");
61 return(-1);
62 }
63 if (c & 0x80)
64 record[acclen++] = 0x1B;
65 record[acclen++] = c & 0x7F;
66 }
67 return(acclen);
68 }