text: /*
   * testcode/readhex.c - read hex data.
   *
   * Copyright (c) 2007, NLnet Labs. All rights reserved.
   *
   * This software is open source.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * Redistributions of source code must retain the above copyright notice,
   * this list of conditions and the following disclaimer.
   *
   * Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   *
   * Neither the name of the NLNET LABS nor the names of its contributors may
   * be used to endorse or promote products derived from this software without
   * specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
   * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
   * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
   * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   *
   */
  /**
   * \file
   * Declarations useful for the unit tests.
   */
  #include "config.h"
  #include <ctype.h>
  #include "testcode/readhex.h"
  #include "util/log.h"
  #include "sldns/sbuffer.h"
  #include "sldns/parseutil.h"
  
  /** skip whitespace */
  static void
  skip_whites(const char** p)
  {
  	while(1) {
  		while(isspace((unsigned char)**p))
  			(*p)++;
  		if(**p == ';') {
  			/* comment, skip until newline */
  			while(**p && **p != '\n')
  				(*p)++;
  			if(**p == '\n')
  				(*p)++;
  		} else return;
  	}
  }
  
  /* takes a hex string and puts into buffer */
  void hex_to_buf(sldns_buffer* pkt, const char* hex)
  {
  	const char* p = hex;
  	int val;
  	sldns_buffer_clear(pkt);
  	while(*p) {
  		skip_whites(&p);
  		if(sldns_buffer_position(pkt) == sldns_buffer_limit(pkt))
  			fatal_exit("hex_to_buf: buffer too small");
  		if(!isalnum((unsigned char)*p))
  			break;
  		val = sldns_hexdigit_to_int(*p++) << 4;
  		skip_whites(&p);
  		log_assert(*p && isalnum((unsigned char)*p));
  		val |= sldns_hexdigit_to_int(*p++);
  		sldns_buffer_write_u8(pkt, (uint8_t)val);
  		skip_whites(&p);
  	}
  	sldns_buffer_flip(pkt);
  }
  
  