text: /*
   * Copyright (c) 1990, 1993, 1994, 1995, 1996
   *	The Regents of the University of California.  All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that: (1) source code distributions
   * retain the above copyright notice and this paragraph in its entirety, (2)
   * distributions including binary code include the above copyright notice and
   * this paragraph in its entirety in the documentation or other materials
   * provided with the distribution, and (3) all advertising materials mentioning
   * features or use of this software display the following acknowledgement:
   * ``This product includes software developed by the University of California,
   * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
   * the University 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 ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
   * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   */
  
  #ifndef lint
  static const char rcsid[] =
      "@(#) $Header: /cvs/sw/new-wave/lib/libpcap/etherent.c,v 1.1 2000/08/03 05:54:28 gerg Exp $ (LBL)";
  #endif
  
  #include <sys/types.h>
  
  #include <ctype.h>
  #include <memory.h>
  #include <stdio.h>
  #include <string.h>
  
  #include "pcap-int.h"
  
  #include <pcap-namedb.h>
  
  #include "gnuc.h"
  #ifdef HAVE_OS_PROTO_H
  #include "os-proto.h"
  #endif
  
  static inline int xdtoi(int);
  static inline int skip_space(FILE *);
  static inline int skip_line(FILE *);
  
  /* Hex digit to integer. */
  static inline int
  xdtoi(c)
  	register int c;
  {
  	if (isdigit(c))
  		return c - '0';
  	else if (islower(c))
  		return c - 'a' + 10;
  	else
  		return c - 'A' + 10;
  }
  
  static inline int
  skip_space(f)
  	FILE *f;
  {
  	int c;
  
  	do {
  		c = getc(f);
  	} while (isspace(c) && c != '\n');
  
  	return c;
  }
  
  static inline int
  skip_line(f)
  	FILE *f;
  {
  	int c;
  
  	do
  		c = getc(f);
  	while (c != '\n' && c != EOF);
  
  	return c;
  }
  
  struct pcap_etherent *
  pcap_next_etherent(FILE *fp)
  {
  	register int c, d, i;
  	char *bp;
  	static struct pcap_etherent e;
  
  	memset((char *)&e, 0, sizeof(e));
  	do {
  		/* Find addr */
  		c = skip_space(fp);
  		if (c == '\n')
  			continue;
  
  		/* If this is a comment, or first thing on line
  		   cannot be etehrnet address, skip the line. */
  		if (!isxdigit(c)) {
  			c = skip_line(fp);
  			continue;
  		}
  
  		/* must be the start of an address */
  		for (i = 0; i < 6; i += 1) {
  			d = xdtoi(c);
  			c = getc(fp);
  			if (isxdigit(c)) {
  				d <<= 4;
  				d |= xdtoi(c);
  				c = getc(fp);
  			}
  			e.addr[i] = d;
  			if (c != ':')
  				break;
  			c = getc(fp);
  		}
  		if (c == EOF)
  			break;
  
  		/* Must be whitespace */
  		if (!isspace(c)) {
  			c = skip_line(fp);
  			continue;
  		}
  		c = skip_space(fp);
  
  		/* hit end of line... */
  		if (c == '\n')
  			continue;
  
  		if (c == '#') {
  			c = skip_line(fp);
  			continue;
  		}
  
  		/* pick up name */
  		bp = e.name;
  		/* Use 'd' to prevent buffer overflow. */
  		d = sizeof(e.name) - 1;
  		do {
  			*bp++ = c;
  			c = getc(fp);
  		} while (!isspace(c) && c != EOF && --d > 0);
  		*bp = '\0';
  
  		/* Eat trailing junk */
  		if (c != '\n')
  			(void)skip_line(fp);
  
  		return &e;
  
  	} while (c != EOF);
  
  	return (NULL);
  }
  