1 /*
2 * testcode/readhex.c - read hex data.
3 *
4 * Copyright (c) 2007, NLnet Labs. All rights reserved.
5 *
6 * This software is open source.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * Redistributions of source code must retain the above copyright notice,
13 * this list of conditions and the following disclaimer.
14 *
15 * Redistributions in binary form must reproduce the above copyright notice,
16 * this list of conditions and the following disclaimer in the documentation
17 * and/or other materials provided with the distribution.
18 *
19 * Neither the name of the NLNET LABS nor the names of its contributors may
20 * be used to endorse or promote products derived from this software without
21 * specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
29 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 */
36 /**
37 * \file
38 * Declarations useful for the unit tests.
39 */
40 #include "config.h"
41 #include <ctype.h>
42 #include "testcode/readhex.h"
43 #include "util/log.h"
44 #include "sldns/sbuffer.h"
45 #include "sldns/parseutil.h"
46
47 /** skip whitespace */
48 static void
skip_whites(const char ** p)49 skip_whites(const char** p)
50 {
51 while(1) {
52 while(isspace((unsigned char)**p))
53 (*p)++;
54 if(**p == ';') {
55 /* comment, skip until newline */
56 while(**p && **p != '\n')
57 (*p)++;
58 if(**p == '\n')
59 (*p)++;
60 } else return;
61 }
62 }
63
64 /* takes a hex string and puts into buffer */
hex_to_buf(sldns_buffer * pkt,const char * hex)65 void hex_to_buf(sldns_buffer* pkt, const char* hex)
66 {
67 const char* p = hex;
68 int val;
69 sldns_buffer_clear(pkt);
70 while(*p) {
71 skip_whites(&p);
72 if(sldns_buffer_position(pkt) == sldns_buffer_limit(pkt))
73 fatal_exit("hex_to_buf: buffer too small");
74 if(!isalnum((unsigned char)*p))
75 break;
76 val = sldns_hexdigit_to_int(*p++) << 4;
77 skip_whites(&p);
78 log_assert(*p && isalnum((unsigned char)*p));
79 val |= sldns_hexdigit_to_int(*p++);
80 sldns_buffer_write_u8(pkt, (uint8_t)val);
81 skip_whites(&p);
82 }
83 sldns_buffer_flip(pkt);
84 }
85
86