Commit | Line | Data |
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f0e54a99 | 1 | /* |
c07be359 | 2 | * This file is part of ipif, part of userv-utils |
f0e54a99 | 3 | * |
9028e234 IJ |
4 | * Copyright 1996-2013 Ian Jackson <ijackson@chiark.greenend.org.uk> |
5 | * Copyright 1998 David Damerell <damerell@chiark.greenend.org.uk> | |
6 | * Copyright 1999,2003 | |
7 | * Chancellor Masters and Scholars of the University of Cambridge | |
8 | * Copyright 2010 Tony Finch <fanf@dotat.at> | |
9 | * | |
f0e54a99 | 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 | |
9028e234 | 12 | * the Free Software Foundation; either version 3 of the License, or |
f0e54a99 | 13 | * (at your option) any later version. |
14 | * | |
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. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
9028e234 | 21 | * along with userv-utils; if not, see http://www.gnu.org/licenses/. |
f0e54a99 | 22 | */ |
2dc68225 | 23 | |
24 | #include <stdio.h> | |
25 | #include <stdlib.h> | |
26 | #include <assert.h> | |
dea61a77 | 27 | #include <string.h> |
2dc68225 | 28 | #include <sysexits.h> |
29 | ||
30 | #include "hex.h" | |
31 | ||
ed509ebd | 32 | const char *tohex(uint8_t *data, int len, char *buf) { |
2dc68225 | 33 | char *p; |
34 | ||
35 | for (p= buf; | |
36 | len>0; | |
37 | len--, data++, p+=2) | |
38 | sprintf(p,"%02x",*data); | |
39 | return buf; | |
40 | } | |
41 | ||
ed509ebd | 42 | void unhex(const char *what, const char *txt, uint8_t *datar, int *lenr, |
2dc68225 | 43 | int minlen, int maxlen) { |
44 | int l, v; | |
45 | char buf[3], *ep; | |
46 | ||
47 | l= strlen(txt); | |
48 | if (l%1) { fprintf(stderr,"odd number of hex digits in %s\n",what); exit(EX_DATAERR); } | |
49 | l>>=1; | |
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); } | |
52 | ||
53 | if (lenr) *lenr= l; | |
54 | while (l) { | |
55 | buf[0]= *txt++; | |
56 | buf[1]= *txt++; | |
57 | buf[2]= 0; | |
58 | v= strtoul(buf,&ep,16); | |
59 | if (*ep) { fprintf(stderr,"not hex digit in %s: %c\n",what,*ep); exit(EX_DATAERR); } | |
60 | *datar++= v; | |
61 | l--; | |
62 | } | |
63 | } |