FreeCalypso > hg > fc-sim-tools

annotate libutil/hexstr.c @ 53:fbedb67d234f

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
serial: fix parity for inverse coding convention Important note: it is my (Mother Mychaela's) understanding that SIM cards with inverse coding convention are extremely rare, and I have never seen such a card. Therefore, our support for the inverse coding convention will likely remain forever untested.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 21 Mar 2021 20:46:09 +0000
parents 34bbb0585cab
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
8
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This module contains the function for decoding hex strings.
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 */
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 #include <sys/types.h>
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <ctype.h>
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <stdio.h>
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 decode_hex_data_from_string(arg, databuf, minlen, maxlen)
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 char *arg;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 u_char *databuf;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 unsigned minlen, maxlen;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 {
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 unsigned count;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 for (count = 0; ; count++) {
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 while (isspace(*arg))
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 arg++;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 if (!*arg)
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 break;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 if (!isxdigit(arg[0]) || !isxdigit(arg[1])) {
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 fprintf(stderr, "error: invalid hex string input\n");
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 return(-1);
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 }
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 if (count >= maxlen) {
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 fprintf(stderr, "error: hex string is too long\n");
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 return(-1);
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 }
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 databuf[count] = (decode_hex_digit(arg[0]) << 4) |
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 decode_hex_digit(arg[1]);
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 arg += 2;
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 }
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 if (count < minlen) {
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 fprintf(stderr, "error: hex string is too short\n");
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 return(-1);
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 }
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 return(count);
34bbb0585cab libutil: import from previous fc-pcsc-tools version
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 }