FreeCalypso > hg > sms-coding-utils

annotate libcoding/gsm7_encode.c @ 8:265b8103530c

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
sms-encode-text: emit empty messages as ""
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 05 Aug 2023 06:40:50 +0000
parents 2d0082216916
children e56bb9f09ff1
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This library module implements the function for encoding from ISO 8859-1
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * into the GSM 7-bit default alphabet (03.38 or 23.038).
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 */
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <sys/types.h>
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 extern u_char gsm7_encode_table[256];
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 latin1_to_gsm7(inbuf, outbuf, outmax, outlenp)
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 u_char *inbuf, *outbuf;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 unsigned outmax, *outlenp;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 {
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 u_char *ip = inbuf, *op = outbuf;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 unsigned outcnt = 0, c, n;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 while (c = *ip++) {
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 c = gsm7_encode_table[c];
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 if (c == 0xFF)
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 return(-1);
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 if (c & 0x80)
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 n = 2;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 else
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 n = 1;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 if (outcnt + n > outmax)
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 return(-2);
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 if (c & 0x80) {
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 *op++ = 0x1B;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 *op++ = c & 0x7F;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 } else
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 *op++ = c;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 outcnt += n;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 }
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 *outlenp = outcnt;
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 return(0);
2d0082216916 libcoding: beginning with a subset of uptools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 }