2 * This file is part of ipif, part of userv-utils
4 * Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk>
5 * Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk>
7 * Chancellor Masters and Scholars of the University of Cambridge
8 * Copyright 2010 Tony Finch <fanf@dotat.at>
10 * This is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 3 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with userv-utils; if not, see http://www.gnu.org/licenses/.
32 const char *tohex(uint8_t *data, int len, char *buf) {
38 sprintf(p,"%02x",*data);
42 void unhex(const char *what, const char *txt, uint8_t *datar, int *lenr,
43 int minlen, int maxlen) {
48 if (l%1) { fprintf(stderr,"odd number of hex digits in %s\n",what); exit(EX_DATAERR); }
50 if (l<minlen) { fprintf(stderr,"too few hex digits in %s\n",what); exit(EX_DATAERR); }
51 if (l>maxlen) { fprintf(stderr,"too many hex digits in %s\n",what); exit(EX_DATAERR); }
58 v= strtoul(buf,&ep,16);
59 if (*ep) { fprintf(stderr,"not hex digit in %s: %c\n",what,*ep); exit(EX_DATAERR); }