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 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 */ 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