text: /*
   * Copyright (c) 1980, 1993
   *	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 the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. 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.
   * 3. All advertising materials mentioning features or use of this software
   *    must display the following acknowledgement:
   *	This product includes software developed by the University of
   *	California, Berkeley and its contributors.
   * 4. 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 BY THE REGENTS 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 REGENTS 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.
   *
   * @(#)mkheaders.c	8.1 (Berkeley) 6/6/93
   * $FreeBSD: src/usr.sbin/config/mkheaders.c,v 1.14.2.2 2001/01/23 00:09:32 peter Exp $
   */
  
  /*
   * Make all the .h files for the optional entries
   */
  
  #include <ctype.h>
  #include <err.h>
  #include <stdio.h>
  #include <string.h>
  #include <sys/param.h>
  #include "config.h"
  #include "y.tab.h"
  
  static void do_header(const char *, char *, int);
  static void do_count(const char *, char *, int);
  static char *toheader(const char *);
  static char *tomacro(const char *);
  
  void
  headers(void)
  {
  	struct file_list *fl;
  	struct device *dp;
  
  	for (fl = ftab; fl != NULL; fl = fl->f_next)
  		if (fl->f_needs != NULL)
  			do_count(fl->f_needs, fl->f_needs, 1);
  	for (dp = dtab; dp != NULL; dp = dp->d_next) {
  		if ((dp->d_type & TYPEMASK) == PSEUDO_DEVICE) {
  			if (!(dp->d_type & DEVDONE)) {
  				printf("Warning: pseudo-device \"%s\" is unknown\n",
  				       dp->d_name);
  				exit(1);
  			}
  		}
  		if ((dp->d_type & TYPEMASK) == DEVICE) {
  			if (!(dp->d_type & DEVDONE)) {
  				printf("Warning: device \"%s\" is unknown\n",
  				       dp->d_name);
  				exit(1);
  			}
  		}
  	}
  }
  
  /*
   * count all the devices of a certain type and recurse to count
   * whatever the device is connected to
   */
  static void
  do_count(const char *dev, char *hname, int search)
  {
  	struct device *dp;
  	int count, hicount;
  	const char *mp;
  
  	/*
  	 * After this loop, "count" will be the actual number of units,
  	 * and "hicount" will be the highest unit declared. do_header()
  	 * must use the higher of these values.
  	 */
  	for (dp = dtab; dp != NULL; dp = dp->d_next) {
  		if (strcmp(dp->d_name, dev) == 0) {
  			if ((dp->d_type & TYPEMASK) == PSEUDO_DEVICE)
  				dp->d_type |= DEVDONE;
  			else if ((dp->d_type & TYPEMASK) == DEVICE)
  				dp->d_type |= DEVDONE;
  		}
  	}
  	for (hicount = count = 0, dp = dtab; dp != NULL; dp = dp->d_next) {
  		if (dp->d_unit != -1 && strcmp(dp->d_name, dev) == 0) {
  			if ((dp->d_type & TYPEMASK) == PSEUDO_DEVICE) {
  				count =
  				    dp->d_count != UNKNOWN ? dp->d_count : 1;
  				break;
  			}
  			count++;
  			/*
  			 * Allow holes in unit numbering,
  			 * assumption is unit numbering starts
  			 * at zero.
  			 */
  			if (dp->d_unit + 1 > hicount)
  				hicount = dp->d_unit + 1;
  			if (search) {
  				mp = dp->d_conn;
  				if (mp != NULL && dp->d_connunit < 0)
  					mp = NULL;
  				if (mp != NULL && strcmp(mp, "nexus") == 0)
  					mp = NULL;
  				if (mp != NULL) {
  					do_count(mp, hname, 0);
  					search = 0;
  				}
  			}
  		}
  	}
  	do_header(dev, hname, count > hicount ? count : hicount);
  }
  
  static void
  do_header(const char *dev, char *hname, int count)
  {
  	char *file, *name, *inw;
  	struct file_list *fl, *fl_head, *tflp;
  	FILE *inf, *outf;
  	int inc, oldcount;
  
  	file = toheader(hname);
  	name = tomacro(dev);
  	inf = fopen(file, "r");
  	oldcount = -1;
  	if (inf == NULL) {
  		outf = fopen(file, "w");
  		if (outf == NULL)
  			err(1, "%s", file);
  		fprintf(outf, "#define %s %d\n", name, count);
  		fclose(outf);
  		return;
  	}
  	fl_head = NULL;
  	for (;;) {
  		char *cp;
  		if ((inw = get_word(inf)) == NULL || inw == (char *)EOF)
  			break;
  		if ((inw = get_word(inf)) == NULL || inw == (char *)EOF)
  			break;
  		inw = strdup(inw);
  		cp = get_word(inf);
  		if (cp == NULL || cp == (char *)EOF)
  			break;
  		inc = atoi(cp);
  		if (strcmp(inw, name) == 0) {
  			oldcount = inc;
  			inc = count;
  		}
  		cp = get_word(inf);
  		if (cp == (char *)EOF)
  			break;
  		fl = malloc(sizeof(*fl));
  		bzero(fl, sizeof(*fl));
  		fl->f_fn = inw;		/* malloced */
  		fl->f_type = inc;
  		fl->f_next = fl_head;
  		fl_head = fl;
  	}
  	fclose(inf);
  	if (count == oldcount) {
  		for (fl = fl_head; fl != NULL; fl = tflp) {
  			tflp = fl->f_next;
  			free(fl->f_fn);
  			free(fl);
  		}
  		return;
  	}
  	if (oldcount == -1) {
  		fl = malloc(sizeof(*fl));
  		bzero(fl, sizeof(*fl));
  		fl->f_fn = strdup(name);
  		fl->f_type = count;
  		fl->f_next = fl_head;
  		fl_head = fl;
  	}
  	outf = fopen(file, "w");
  	if (outf == NULL)
  		err(1, "%s", file);
  	for (fl = fl_head; fl != NULL; fl = tflp) {
  		fprintf(outf,
  		    "#define %s %u\n", fl->f_fn, count ? fl->f_type : 0);
  		tflp = fl->f_next;
  		free(fl->f_fn);
  		free(fl);
  	}
  	fclose(outf);
  }
  
  /*
   * convert a dev name to a .h file name
   */
  static char *
  toheader(const char *dev)
  {
  	static char hbuf[MAXPATHLEN];
  	static char udev[MAXPATHLEN];
  
  	snprintf(udev, sizeof(udev), "use_%s", dev);
  
  	snprintf(hbuf, sizeof(hbuf), "%s.h", path(udev));
  	return(hbuf);
  }
  
  /*
   * convert a dev name to a macro name
   */
  static char *
  tomacro(const char *dev)
  {
  	static char mbuf[20];
  	char *cp;
  
  	cp = mbuf;
  	*cp++ = 'N';
  	while (*dev != 0)
  		*cp++ = islower(*dev) ? toupper(*dev++) : *dev++;
  	*cp++ = 0;
  	return(mbuf);
  }
  