FreeCalypso > hg > freecalypso-tools

comparison uptools/libcoding/number_encode.c @ 358:7154a231e4b5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
uptools/libcoding: SMS dest address parsing and encoding implemented
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 07 Feb 2018 07:30:22 +0000
parents
children
comparison
equal deleted inserted replaced
357:15120d15cab5 358:7154a231e4b5
1 /*
2 * This library module implements the function that parses SMS destination
3 * addresses given by the user and encodes them into the GSM 03.40
4 * TP-Destination-Address structure.
5 */
6
7 #include <sys/types.h>
8 #include <ctype.h>
9 #include <stdlib.h>
10
11 digit_char_to_gsm(ch)
12 {
13 switch (ch) {
14 case '0':
15 case '1':
16 case '2':
17 case '3':
18 case '4':
19 case '5':
20 case '6':
21 case '7':
22 case '8':
23 case '9':
24 return (ch - '0');
25 case '*':
26 return 0xA;
27 case '#':
28 return 0xB;
29 case 'a':
30 case 'b':
31 case 'c':
32 return (ch - 'a' + 0xC);
33 case 'A':
34 case 'B':
35 case 'C':
36 return (ch - 'A' + 0xC);
37 }
38 return (-1);
39 }
40
41 parse_and_encode_dest_addr(input, outbuf)
42 char *input;
43 u_char *outbuf;
44 {
45 char *cp, *endp;
46 int d;
47 u_char digits[20];
48 unsigned n;
49
50 cp = input;
51 if (*cp == '+') {
52 outbuf[1] = 0x91;
53 cp++;
54 } else
55 outbuf[1] = 0x81;
56 if (digit_char_to_gsm(*cp) < 0)
57 return(-1);
58 n = 0;
59 while ((d = digit_char_to_gsm(*cp)) >= 0) {
60 cp++;
61 if (n >= 20)
62 return(-1);
63 digits[n++] = d;
64 }
65 outbuf[0] = n;
66 while (n < 20)
67 digits[n++] = 0xF;
68 if (*cp == ',') {
69 cp++;
70 if (!isdigit(*cp))
71 return(-1);
72 outbuf[1] = strtoul(cp, &endp, 0);
73 if (*endp)
74 return(-1);
75 } else if (*cp)
76 return(-1);
77 for (n = 0; n < 10; n++)
78 outbuf[2+n] = (digits[n*2+1] << 4) | digits[n*2];
79 return(0);
80 }