mkhybrid/src/write.c

/*
 * Program write.c - dump memory  structures to  file for iso9660 filesystem.

   Written by Eric Youngdale (1993).

   Copyright 1993 Yggdrasil Computing, Incorporated

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* APPLE_HYB James Pearson j.pearson@ge.ucl.ac.uk 16/3/1999 */
#include <string.h>
#include <stdlib.h>
#include <err.h>
#include "config.h"
#include "mkisofs.h"
#include "iso9660.h"
#include "volume.h"
#include "write.h"
#include "apple_proto.h"
#include "mac_label_proto.h"
#include <time.h>
#include <errno.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef __SVR4
extern char * strdup(const char *);
#endif

#ifdef VMS
extern char * strdup(const char *);
#endif


/* Max number of sectors we will write at  one time */
#define NSECT 16

/* Counters for statistics */

static int table_size       = 0;
static int total_dir_size   = 0;
static int rockridge_size   = 0;
static struct directory ** pathlist;
static int next_path_index  = 1;
static int sort_goof;

struct output_fragment * out_tail;
struct output_fragment * out_list;

struct iso_primary_descriptor vol_desc;

#ifdef APPLE_HYB
static int hfs_pad;
#endif /* APPLE_HYB */

static int root_gen	__PR((void));
static int generate_path_tables	__PR((void));
static int file_gen	__PR((void));
static int dirtree_dump	__PR((void));

/* Routines to actually write the disc.  We write sequentially so that
   we could write a tape, or write the disc directly */


#define FILL_SPACE(X)   memset(vol_desc.X, ' ', sizeof(vol_desc.X))

void FDECL2(set_721, char *, pnt, unsigned int, i)
{
     pnt[0] = i & 0xff;
     pnt[1] = (i >> 8) &  0xff;
}

void FDECL2(set_722, char *, pnt, unsigned int, i)
{
     pnt[0] = (i >> 8) &  0xff;
     pnt[1] = i & 0xff;
}

void FDECL2(set_723, char *, pnt, unsigned int, i)
{
     pnt[3] = pnt[0] = i & 0xff;
     pnt[2] = pnt[1] = (i >> 8) &  0xff;
}

void FDECL2(set_731, char *, pnt, unsigned int, i)
{
     pnt[0] = i & 0xff;
     pnt[1] = (i >> 8) &  0xff;
     pnt[2] = (i >> 16) &  0xff;
     pnt[3] = (i >> 24) &  0xff;
}

void FDECL2(set_732, char *, pnt, unsigned int, i)
{
     pnt[3] = i & 0xff;
     pnt[2] = (i >> 8) &  0xff;
     pnt[1] = (i >> 16) &  0xff;
     pnt[0] = (i >> 24) &  0xff;
}

int FDECL1(get_733, char *, p)
{
     return ((p[0] & 0xff)
	     | ((p[1] & 0xff) << 8)
	     | ((p[2] & 0xff) << 16)
	     | ((p[3] & 0xff) << 24));
}

void FDECL2(set_733, char *, pnt, unsigned int, i)
{
     pnt[7] = pnt[0] = i & 0xff;
     pnt[6] = pnt[1] = (i >> 8) &  0xff;
     pnt[5] = pnt[2] = (i >> 16) &  0xff;
     pnt[4] = pnt[3] = (i >> 24) &  0xff;
}

void FDECL4(xfwrite, void *, buffer, int, count, int, size, FILE *, file)
{
	/*
	 * This is a hack that could be made better. XXXIs this the only place?
	 * It is definitely needed on Operating Systems that do not
	 * allow to write files that are > 2GB.
	 * If the system is fast enough to be able to feed 1400 KB/s
	 * writing speed of a DVD-R drive, use stdout.
	 * If the system cannot do this reliable, you need to use this
	 * hacky option.
	 */
	static	int	idx = 0;
	if (split_output != 0 &&
	    (idx == 0 || ftell(file) >= (1024 * 1024 * 1024) )) {
			char	nbuf[512];
		extern	char	*outfile;

		if (idx == 0)
			unlink(outfile);
		snprintf(nbuf, sizeof nbuf, "%s_%02d", outfile, idx++);
		file = freopen(nbuf, "wb", file);
		if (file == NULL) {
			fprintf(stderr, "Cannot open '%s'.\n", nbuf);
			exit(1);
		}

	}
     while(count)
     {
	  int got = fwrite(buffer,size,count,file);

	  if(got<=0)
	  {
	       fprintf(stderr,"cannot fwrite %d*%d\n",size,count);
	       exit(1);
	  }
	  count-=got,*(char**)&buffer+=size*got;
     }
}

#ifdef APPLE_HYB
/* use the deferred_write struct to store info about the hfs_boot_file */
static struct deferred_write mac_boot;
#endif /* APPLE_HYB */
static struct deferred_write * dw_head = NULL, * dw_tail = NULL;

unsigned int last_extent_written  =0;
static int path_table_index;
static time_t begun;

/* We recursively walk through all of the directories and assign extent
   numbers to them.  We have already assigned extent numbers to everything that
   goes in front of them */

static int FDECL1(assign_directory_addresses, struct directory *, node)
{
     int		dir_size;
     struct directory * dpnt;

     dpnt = node;

     while (dpnt)
     {
	  /* skip if it's hidden */
	  if(dpnt->dir_flags & INHIBIT_ISO9660_ENTRY) {
	     dpnt = dpnt->next;
	     continue;
	  }

	  /*
	   * If we already have an extent for this (i.e. it came from
	   * a multisession disc), then don't reassign a new extent.
	   */
	  dpnt->path_index = next_path_index++;
	  if( dpnt->extent == 0 )
	  {
	       dpnt->extent = last_extent;
	       dir_size = (dpnt->size + (SECTOR_SIZE - 1)) >> 11;

	       last_extent += dir_size;

	       /*
		* Leave room for the CE entries for this directory.  Keep them
		* close to the reference directory so that access will be
		* quick.
		*/
	       if(dpnt->ce_bytes)
	       {
		    last_extent += ROUND_UP(dpnt->ce_bytes) >> 11;
	       }
	  }

	  if(dpnt->subdir)
	  {
	       assign_directory_addresses(dpnt->subdir);
	  }

	  dpnt = dpnt->next;
     }
     return 0;
}

#ifdef APPLE_HYB
static void FDECL4(write_one_file, char *, filename,
		   unsigned int, size, FILE *, outfile, unsigned int, off)
#else
static void FDECL3(write_one_file, char *, filename,
		   unsigned int, size, FILE *, outfile)
#endif /* APPLE_HYB */
{
     char		  buffer[SECTOR_SIZE * NSECT];
     FILE		* infile;
     int		  remain;
     int		  use;


     if ((infile = fopen(filename, "rb")) == NULL)
     {
#if defined(sun) || defined(_AUX_SOURCE)
	  fprintf(stderr, "cannot open %s: (%d)\n", filename, errno);
#else
	  fprintf(stderr, "cannot open %s: %s\n", filename, strerror(errno));
#endif
	  exit(1);
     }
#ifdef APPLE_HYB
     fseek(infile, off, SEEK_SET);
#endif /* APPLE_HYB */
     remain = size;

     while(remain > 0)
     {
	  use =  (remain >  SECTOR_SIZE * NSECT - 1 ? NSECT*SECTOR_SIZE : remain);
	  use = ROUND_UP(use); /* Round up to nearest sector boundary */
	  memset(buffer, 0, use);
	  if (fread(buffer, 1, use, infile) == 0)
	  {
		fprintf(stderr,"cannot read from %s\n",filename);
		exit(1);
	  }
	  xfwrite(buffer, 1, use, outfile);
	  last_extent_written += use/SECTOR_SIZE;
#if 0
	  if((last_extent_written % 1000) < use/SECTOR_SIZE)
	  {
	       fprintf(stderr,"%d..", last_extent_written);
	  }
#else
	  if((last_extent_written % 5000) < use/SECTOR_SIZE)
	  {
	       time_t now;
	       time_t the_end;
	       double frac;

	       time(&now);
	       frac = last_extent_written / (double)last_extent;
	       the_end = begun + (now - begun) / frac;
	       fprintf(stderr, "%6.2f%% done, estimate finish %s",
		       frac * 100., ctime(&the_end));
	  }
#endif
	  remain -= use;
     }
     fclose(infile);
} /* write_one_file(... */

static void FDECL1(write_files, FILE *, outfile)
{
     struct deferred_write * dwpnt, *dwnext;
     dwpnt = dw_head;
     while(dwpnt)
     {
	  if(dwpnt->table)
	  {
	       xfwrite(dwpnt->table,  1, ROUND_UP(dwpnt->size), outfile);
	       last_extent_written += ROUND_UP(dwpnt->size) / SECTOR_SIZE;
	       table_size += dwpnt->size;
/*		  fprintf(stderr,"Size %d ", dwpnt->size); */
	       free(dwpnt->table);
	  }
	  else
	  {

#ifdef VMS
	       vms_write_one_file(dwpnt->name, dwpnt->size, outfile);
#else
#ifdef APPLE_HYB
	       write_one_file(dwpnt->name, dwpnt->size, outfile, dwpnt->off);
#else
	       write_one_file(dwpnt->name, dwpnt->size, outfile);
#endif /* APPLE_HYB */
#endif
	       free(dwpnt->name);
	  }

#ifdef APPLE_HYB
	  if (apple_hyb)
	  {
		/* we may have to pad out ISO files to work with
		   HFS clump sizes */
		char blk[SECTOR_SIZE];
		int i;

		for(i=0;i<dwpnt->pad;i++)
		    xfwrite(blk, 1, SECTOR_SIZE, outfile);

		last_extent_written += dwpnt->pad;
          }
#endif /* APPLE_HYB */

	  dwnext = dwpnt;
	  dwpnt = dwpnt->next;
	  free(dwnext);
     }
} /* write_files(... */

#if 0
static void dump_filelist()
{
     struct deferred_write * dwpnt;
     dwpnt = dw_head;
     while(dwpnt)
     {
	  fprintf(stderr, "File %s\n",dwpnt->name);
	  dwpnt = dwpnt->next;
     }
     fprintf(stderr,"\n");
}
#endif

static int FDECL2(compare_dirs, const void *, rr, const void *, ll)
{
     char * rpnt, *lpnt;
     struct directory_entry ** r, **l;

     r = (struct directory_entry **) rr;
     l = (struct directory_entry **) ll;
     rpnt = (*r)->isorec.name;
     lpnt = (*l)->isorec.name;

#ifdef APPLE_HYB
     /* resource fork MUST (not sure if this is true for HFS volumes) be
        before the data fork - so force it here */
     if ((*r)->assoc && (*r)->assoc == (*l))
        return 1;
     if ((*l)->assoc && (*l)->assoc == (*r))
	return -1;
#endif /* APPLE_HYB */

     /*
      * If the entries are the same, this is an error.
      */
     if( strcmp(rpnt, lpnt) == 0 )
       {
	 sort_goof++;
       }

     /*
      *  Put the '.' and '..' entries on the head of the sorted list.
      *  For normal ASCII, this always happens to be the case, but out of
      *  band characters cause this not to be the case sometimes.
      *
      * FIXME(eric) - these tests seem redundant, in taht the name is
      * never assigned these values.  It will instead be \000 or \001,
      * and thus should always be sorted correctly.   I need to figure
      * out why I thought I needed this in the first place.
      */
#if 0
     if( strcmp(rpnt, ".") == 0 ) return -1;
     if( strcmp(lpnt, ".") == 0 ) return  1;

     if( strcmp(rpnt, "..") == 0 ) return -1;
     if( strcmp(lpnt, "..") == 0 ) return  1;
#else
     /*
      * The code above is wrong (as explained in Eric's comment), leading to incorrect
      * sort order iff the -L option ("allow leading dots") is in effect and a directory
      * contains entries that start with a dot.
      *
      * (TF, Tue Dec 29 13:49:24 CET 1998)
      */
     if((*r)->isorec.name_len[0] == 1 && *rpnt == 0) return -1; /* '.' */
     if((*l)->isorec.name_len[0] == 1 && *lpnt == 0) return 1;

     if((*r)->isorec.name_len[0] == 1 && *rpnt == 1) return -1; /* '..' */
     if((*l)->isorec.name_len[0] == 1 && *lpnt == 1) return 1;
#endif

     while(*rpnt && *lpnt)
     {
	  if(*rpnt == ';' && *lpnt != ';') return -1;
	  if(*rpnt != ';' && *lpnt == ';') return 1;

	  if(*rpnt == ';' && *lpnt == ';') return 0;

	  if(*rpnt == '.' && *lpnt != '.') return -1;
	  if(*rpnt != '.' && *lpnt == '.') return 1;

	  if((unsigned char)*rpnt < (unsigned char)*lpnt) return -1;
	  if((unsigned char)*rpnt > (unsigned char)*lpnt) return 1;
	  rpnt++;  lpnt++;
     }
     if(*rpnt) return 1;
     if(*lpnt) return -1;
     return 0;
}

/*
 * Function:		sort_directory
 *
 * Purpose:		Sort the directory in the appropriate ISO9660
 *			order.
 *
 * Notes:		Returns 0 if OK, returns > 0 if an error occurred.
 */
int FDECL1(sort_directory, struct directory_entry **, sort_dir)
{
     int dcount = 0;
     int xcount = 0;
     int j;
     int i, len;
     struct directory_entry * s_entry;
     struct directory_entry ** sortlist;

     /* need to keep a count of how many entries are hidden */
     s_entry = *sort_dir;
     while(s_entry)
     {
	  if (s_entry->de_flags & INHIBIT_ISO9660_ENTRY)
	    xcount++;
	  dcount++;
	  s_entry = s_entry->next;
     }

     if( dcount == 0 )
     {
          return 0;
     }

     /*
      * OK, now we know how many there are.  Build a vector for sorting.
      */
     sortlist =   (struct directory_entry **)
	  e_malloc(sizeof(struct directory_entry *) * dcount);

     j = dcount - 1;
     dcount = 0;
     s_entry = *sort_dir;
     while(s_entry)
     {
	if(s_entry->de_flags & INHIBIT_ISO9660_ENTRY)
	 {
	  /* put any hidden entries at the end of the vector */
	  sortlist[j--] = s_entry;
	 }
	else
	 {
	  sortlist[dcount] = s_entry;
	  dcount++;
	 }
	 len = s_entry->isorec.name_len[0];
	 s_entry->isorec.name[len] = 0;
	 s_entry = s_entry->next;
     }

     /*
      * Each directory is required to contain at least . and ..
      */
     if( dcount < 2 )
       {
	 sort_goof = 1;

       }
     else
       {
	 /* only sort the non-hidden entries */
	 sort_goof = 0;
#ifdef __STDC__
	 qsort(sortlist, dcount, sizeof(struct directory_entry *),
	       (int (*)(const void *, const void *))compare_dirs);
#else
	 qsort(sortlist, dcount, sizeof(struct directory_entry *),
	       compare_dirs);
#endif

	 /*
	  * Now reassemble the linked list in the proper sorted order
	  * We still need the hidden entries, as they may be used in the
	  * Joliet tree.
	  */
	 for(i=0; i<dcount+xcount-1; i++)
	   {
	     sortlist[i]->next = sortlist[i+1];
	   }

	 sortlist[dcount+xcount-1]->next = NULL;
	 *sort_dir = sortlist[0];
       }

     free(sortlist);
     return sort_goof;
}

static int root_gen()
{
     init_fstatbuf();

     root_record.length[0] = 1 + sizeof(struct iso_directory_record)
	  - sizeof(root_record.name);
     root_record.ext_attr_length[0] = 0;
     set_733((char *) root_record.extent, root->extent);
     set_733((char *) root_record.size, ROUND_UP(root->size));
     iso9660_date(root_record.date, root_statbuf.st_mtime);
     root_record.flags[0] = 2;
     root_record.file_unit_size[0] = 0;
     root_record.interleave[0] = 0;
     set_723(root_record.volume_sequence_number, volume_sequence_number);
     root_record.name_len[0] = 1;
     return 0;
}

static void FDECL1(assign_file_addresses, struct directory *, dpnt)
{
     struct directory * finddir;
     struct directory_entry * s_entry;
     struct file_hash *s_hash;
     struct deferred_write * dwpnt;
     char whole_path[1024];

     while (dpnt)
     {
	  s_entry = dpnt->contents;
	  for(s_entry = dpnt->contents; s_entry; s_entry = s_entry->next)
	  {
	       /*
		* If we already have an  extent for this entry,
		* then don't assign a new one.  It must have come
		* from a previous session on the disc.  Note that
		* we don't end up scheduling the thing for writing
		* either.
		*/
	       if( isonum_733((unsigned char *) s_entry->isorec.extent) != 0 )
	       {
		    continue;
	       }

	       /*
		* This saves some space if there are symlinks present
		*/
	       s_hash = find_hash(s_entry->dev, s_entry->inode);
	       if(s_hash)
	       {
		    if(verbose > 2)
		    {
			 fprintf(stderr, "Cache hit for %s%s%s\n",s_entry->filedir->de_name,
				 SPATH_SEPARATOR, s_entry->name);
		    }
		    set_733((char *) s_entry->isorec.extent, s_hash->starting_block);
		    set_733((char *) s_entry->isorec.size, s_hash->size);
		    continue;
	       }

	       /*
		* If this is for a directory that is not a . or a .. entry,
		* then look up the information for the entry.  We have already
		* assigned extents for directories, so we just need to
		* fill in the blanks here.
		*/
	       if (strcmp(s_entry->name,".") && strcmp(s_entry->name,"..") &&
		   s_entry->isorec.flags[0] == 2)
	       {
		    finddir = dpnt->subdir;
		    while(1==1)
		    {
			 if(finddir->self == s_entry) break;
			 finddir = finddir->next;
			 if(!finddir)
			 {
			      fprintf(stderr,"Fatal goof\n"); exit(1);
			 }
		    }
		    set_733((char *) s_entry->isorec.extent, finddir->extent);
		    s_entry->starting_block = finddir->extent;
		    s_entry->size = ROUND_UP(finddir->size);
		    total_dir_size += s_entry->size;
		    add_hash(s_entry);
		    set_733((char *) s_entry->isorec.size, ROUND_UP(finddir->size));
		    continue;
	       }


	       /*
		* If this is . or .., then look up the relevant info from the
		* tables.
		*/
	       if(strcmp(s_entry->name,".") == 0)
	       {
		    set_733((char *) s_entry->isorec.extent, dpnt->extent);

		    /*
		     * Set these so that the hash table has the
		     * correct information
		     */
		    s_entry->starting_block = dpnt->extent;
		    s_entry->size = ROUND_UP(dpnt->size);

		    add_hash(s_entry);
		    s_entry->starting_block = dpnt->extent;
		    set_733((char *) s_entry->isorec.size, ROUND_UP(dpnt->size));
		    continue;
	       }

	       if(strcmp(s_entry->name,"..") == 0)
	       {
		    if(dpnt == root)
		    {
			 total_dir_size += root->size;
		    }
		    set_733((char *) s_entry->isorec.extent, dpnt->parent->extent);

		    /*
		     * Set these so that the hash table has the
		     * correct information
		     */
		    s_entry->starting_block = dpnt->parent->extent;
		    s_entry->size = ROUND_UP(dpnt->parent->size);

		    add_hash(s_entry);
		    s_entry->starting_block = dpnt->parent->extent;
		    set_733((char *) s_entry->isorec.size, ROUND_UP(dpnt->parent->size));
		    continue;
	       }

	       /*
		* Some ordinary non-directory file.  Just schedule the
		* file to be written.  This is all quite
		* straightforward, just make a list and assign extents
		* as we go.  Once we get through writing all of the
		* directories, we should be ready write out these
		* files
		*/
	       if(s_entry->size)
	       {
		    dwpnt = (struct deferred_write *)
			 e_malloc(sizeof(struct deferred_write));
#ifdef APPLE_HYB
		    /* save this directory entry for later use */
		    dwpnt->s_entry = s_entry;
		    /* set the initial padding to zero */
		    dwpnt->pad = 0;
		    /* maybe an offset to start of the real file/fork */
		    dwpnt->off = s_entry->hfs_off;
#endif /* APPLE_HYB */
		    if(dw_tail)
		    {
			 dw_tail->next = dwpnt;
			 dw_tail = dwpnt;
		    }
		    else
		    {
			 dw_head = dwpnt;
			 dw_tail = dwpnt;
		    }
		    if(s_entry->inode  ==  TABLE_INODE)
		    {
			 dwpnt->table = s_entry->table;
			 dwpnt->name = NULL;
#ifdef APPLE_HYB
			 snprintf(whole_path, sizeof whole_path, "%s%s%s",
				 s_entry->filedir->whole_name, SPATH_SEPARATOR,
					trans_tbl);
#else
			 snprintf(whole_path, sizeof whole_path,
			 	"%s%sTRANS.TBL",
				 s_entry->filedir->whole_name, SPATH_SEPARATOR);
#endif /* APPLE_HYB */
		    }
		    else
		    {
			 dwpnt->table = NULL;
			 strcpy(whole_path, s_entry->whole_name);
			 dwpnt->name = strdup(whole_path);
		    }
		    dwpnt->next = NULL;
		    dwpnt->size = s_entry->size;
		    dwpnt->extent = last_extent;
		    set_733((char *) s_entry->isorec.extent, last_extent);
		    s_entry->starting_block = last_extent;
		    add_hash(s_entry);
		    last_extent += ROUND_UP(s_entry->size) >> 11;
		    if(verbose > 2)
		    {
			 fprintf(stderr,"%d %d %s\n", s_entry->starting_block,
				 last_extent-1, whole_path);
		    }
#ifdef DBG_ISO
		    if((ROUND_UP(s_entry->size) >> 11) > 500)
		    {
			 fprintf(stderr,"Warning: large file %s\n", whole_path);
			 fprintf(stderr,"Starting block is %d\n", s_entry->starting_block);
			 fprintf(stderr,"Reported file size is %d extents\n", s_entry->size);

		    }
#endif
#ifdef	NOT_NEEDED	/* Never use this code if you like to create a DVD */

		    if(last_extent > (800000000 >> 11))
		    {
			 /*
			  * More than 800Mb? Punt
			  */
			 fprintf(stderr,"Extent overflow processing file %s\n", whole_path);
			 fprintf(stderr,"Starting block is %d\n", s_entry->starting_block);
			 fprintf(stderr,"Reported file size is %d extents\n", s_entry->size);
			 exit(1);
		    }
#endif
		    continue;
	       }

	       /*
		* This is for zero-length files.  If we leave the extent 0,
		* then we get screwed, because many readers simply drop files
		* that have an extent of zero.  Thus we leave the size 0,
		* and just assign the extent number.
		*/
	       set_733((char *) s_entry->isorec.extent, last_extent);
	  }
	  if(dpnt->subdir)
	  {
	       assign_file_addresses(dpnt->subdir);
	  }
	  dpnt = dpnt->next;
     }
} /* assign_file_addresses(... */

static void FDECL1(free_one_directory, struct directory *, dpnt)
{
     struct directory_entry		* s_entry;
     struct directory_entry		* s_entry_d;

     s_entry = dpnt->contents;
     while(s_entry)
     {
	 s_entry_d = s_entry;
	 s_entry = s_entry->next;

	 if( s_entry_d->name != NULL )
	 {
	     free (s_entry_d->name);
	 }
	 if( s_entry_d->whole_name != NULL )
	 {
	     free (s_entry_d->whole_name);
	 }
#ifdef APPLE_HYB
	 if (apple_both && s_entry_d->hfs_ent && !s_entry_d->assoc)
	     free(s_entry_d->hfs_ent);
#endif /* APPLE_HYB */

	 free (s_entry_d);
     }
     dpnt->contents = NULL;
} /* free_one_directory(... */

static void FDECL1(free_directories, struct directory *, dpnt)
{
  while (dpnt)
    {
      free_one_directory(dpnt);
      if(dpnt->subdir) free_directories(dpnt->subdir);
      dpnt = dpnt->next;
    }
}

void FDECL2(generate_one_directory, struct directory *, dpnt, FILE *, outfile)
{
     unsigned int			  ce_address = 0;
     char				* ce_buffer;
     unsigned int			  ce_index = 0;
     unsigned int			  ce_size;
     unsigned int			  dir_index;
     char				* directory_buffer;
     int				  new_reclen;
     struct directory_entry		* s_entry;
     struct directory_entry		* s_entry_d;
     unsigned int			  total_size;

     total_size = (dpnt->size + (SECTOR_SIZE - 1)) &  ~(SECTOR_SIZE - 1);
     directory_buffer = (char *) e_malloc(total_size);
     memset(directory_buffer, 0, total_size);
     dir_index = 0;

     ce_size = (dpnt->ce_bytes + (SECTOR_SIZE - 1)) &  ~(SECTOR_SIZE - 1);
     ce_buffer = NULL;

     if(ce_size)
     {
	  ce_buffer = (char *) e_malloc(ce_size);
	  memset(ce_buffer, 0, ce_size);

	  ce_index = 0;

	  /*
	   * Absolute byte address of CE entries for this directory
	   */
	  ce_address = last_extent_written + (total_size >> 11);
	  ce_address = ce_address << 11;
     }

     s_entry = dpnt->contents;
     while(s_entry)
     {
	  /* skip if it's hidden */
	  if(s_entry->de_flags & INHIBIT_ISO9660_ENTRY) {
	    s_entry = s_entry->next;
	    continue;
	  }

	  /*
	   * We do not allow directory entries to cross sector boundaries.
	   * Simply pad, and then start the next entry at the next sector
	   */
	  new_reclen = s_entry->isorec.length[0];
	  if( (dir_index & (SECTOR_SIZE - 1)) + new_reclen >= SECTOR_SIZE )
	  {
	       dir_index = (dir_index + (SECTOR_SIZE - 1)) &
		    ~(SECTOR_SIZE - 1);
	  }

	  memcpy(directory_buffer + dir_index, &s_entry->isorec,
		 sizeof(struct iso_directory_record) -
		 sizeof(s_entry->isorec.name) + s_entry->isorec.name_len[0]);
	  dir_index += sizeof(struct iso_directory_record) -
	       sizeof (s_entry->isorec.name)+ s_entry->isorec.name_len[0];

	  /*
	   * Add the Rock Ridge attributes, if present
	   */
	  if(s_entry->rr_attr_size)
	  {
	       if(dir_index & 1)
	       {
		    directory_buffer[dir_index++] = 0;
	       }

	       /*
		* If the RR attributes were too long, then write the
		* CE records, as required.
		*/
	       if(s_entry->rr_attr_size != s_entry->total_rr_attr_size)
	       {
		    unsigned char * pnt;
		    int len, nbytes;

		    /*
		     * Go through the entire record and fix up the CE entries
		     * so that the extent and offset are correct
		     */

		    pnt = s_entry->rr_attributes;
		    len = s_entry->total_rr_attr_size;
		    while(len > 3)
		    {
#ifdef DEBUG
			 if (!ce_size)
			 {
			      fprintf(stderr,"Warning: ce_index(%d) && ce_address(%d) not initialized\n",
				      ce_index, ce_address);
			 }
#endif

			 if(pnt[0] == 'C' && pnt[1] == 'E')
			 {
			      nbytes = get_733( (char *) pnt+20);

			      if((ce_index & (SECTOR_SIZE - 1)) + nbytes >=
				 SECTOR_SIZE)
			      {
				   ce_index = ROUND_UP(ce_index);
			      }

			      set_733( (char *) pnt+4,
				       (ce_address + ce_index) >> 11);
			      set_733( (char *) pnt+12,
				       (ce_address + ce_index) & (SECTOR_SIZE - 1));


			      /*
			       * Now store the block in the ce buffer
			       */
			      memcpy(ce_buffer + ce_index,
				     pnt + pnt[2], nbytes);
			      ce_index += nbytes;
			      if(ce_index & 1)
			      {
				   ce_index++;
			      }
			 }
			 len -= pnt[2];
			 pnt += pnt[2];
		    }

	       }

	       rockridge_size += s_entry->total_rr_attr_size;
	       memcpy(directory_buffer + dir_index, s_entry->rr_attributes,
		      s_entry->rr_attr_size);
	       dir_index += s_entry->rr_attr_size;
	  }
	  if(dir_index & 1)
	  {
	       directory_buffer[dir_index++] = 0;
	  }

	  s_entry_d = s_entry;
	  s_entry = s_entry->next;

	  /*
	   * Joliet doesn't use the Rock Ridge attributes, so we free it here.
	   */
	  if (s_entry_d->rr_attributes)
	    {
	      free(s_entry_d->rr_attributes);
	      s_entry_d->rr_attributes = NULL;
	    }
     }

     if(dpnt->size != dir_index)
     {
	  fprintf(stderr,"Unexpected directory length %d %d %s\n",dpnt->size,
	    dir_index, dpnt->de_name);
     }

     xfwrite(directory_buffer, 1, total_size, outfile);
     last_extent_written += total_size >> 11;
     free(directory_buffer);

     if(ce_size)
     {
	  if(ce_index != dpnt->ce_bytes)
	  {
	       fprintf(stderr,"Continuation entry record length mismatch (%d %d).\n",
		       ce_index, dpnt->ce_bytes);
	  }
	  xfwrite(ce_buffer, 1, ce_size, outfile);
	  last_extent_written += ce_size >> 11;
	  free(ce_buffer);
     }

} /* generate_one_directory(... */

static
void FDECL1(build_pathlist, struct directory *, node)
{
     struct directory * dpnt;

     dpnt = node;

     while (dpnt)
     {
	/* skip if it's hidden */
	if( (dpnt->dir_flags & INHIBIT_ISO9660_ENTRY) == 0 )
	  pathlist[dpnt->path_index] = dpnt;

	if(dpnt->subdir) build_pathlist(dpnt->subdir);
	dpnt = dpnt->next;
     }
} /* build_pathlist(... */

static int FDECL2(compare_paths, void const *, r, void const *, l)
{
  struct directory const *ll = *(struct directory * const *)l;
  struct directory const *rr = *(struct directory * const *)r;

  if (rr->parent->path_index < ll->parent->path_index)
  {
       return -1;
  }

  if (rr->parent->path_index > ll->parent->path_index)
  {
       return 1;
  }

  return strcmp(rr->self->isorec.name, ll->self->isorec.name);

} /* compare_paths(... */

static int generate_path_tables()
{
  struct directory_entry * de;
  struct directory	 * dpnt;
  int			   fix;
  int			   i;
  int			   j;
  int			   namelen;
  char			 * npnt;
  char			 * npnt1;
  int			   tablesize;

  /*
   * First allocate memory for the tables and initialize the memory
   */
  tablesize = path_blocks << 11;
  path_table_m = (char *) e_malloc(tablesize);
  path_table_l = (char *) e_malloc(tablesize);
  memset(path_table_l, 0, tablesize);
  memset(path_table_m, 0, tablesize);

  /*
   * Now start filling in the path tables.  Start with root directory
   */
  if( next_path_index > 0xffff )
  {
      fprintf(stderr, "Unable to generate sane path tables - too many directories (%d)\n",
	      next_path_index);
      exit(1);
  }

  path_table_index = 0;
  pathlist = (struct directory **) e_malloc(sizeof(struct directory *)
					    * next_path_index);
  memset(pathlist, 0, sizeof(struct directory *) * next_path_index);
  build_pathlist(root);

  do
  {
       fix = 0;
#ifdef __STDC__
       qsort(&pathlist[1], next_path_index-1, sizeof(struct directory *),
	     (int (*)(const void *, const void *))compare_paths);
#else
       qsort(&pathlist[1], next_path_index-1, sizeof(struct directory *),
	     compare_paths);
#endif

       for(j=1; j<next_path_index; j++)
       {
	    if(pathlist[j]->path_index != j)
	    {
		 pathlist[j]->path_index = j;
		 fix++;
	    }
       }
  } while(fix);

  for(j=1; j<next_path_index; j++)
  {
       dpnt = pathlist[j];
       if(!dpnt)
       {
	    fprintf(stderr,"Entry %d not in path tables\n", j);
	    exit(1);
       }
       npnt = dpnt->de_name;

       /*
	* So the root comes out OK
	*/
       if( (*npnt == 0) || (dpnt == root) )
       {
	    npnt = ".";
       }
       npnt1 = strrchr(npnt, PATH_SEPARATOR);
       if(npnt1)
       {
	    npnt = npnt1 + 1;
       }

       de = dpnt->self;
       if(!de)
       {
	    fprintf(stderr,"Fatal goof\n");
	    exit(1);
       }


       namelen = de->isorec.name_len[0];

       path_table_l[path_table_index] = namelen;
       path_table_m[path_table_index] = namelen;
       path_table_index += 2;

       set_731(path_table_l + path_table_index, dpnt->extent);
       set_732(path_table_m + path_table_index, dpnt->extent);
       path_table_index += 4;

       set_721(path_table_l + path_table_index,
	       dpnt->parent->path_index);
       set_722(path_table_m + path_table_index,
	       dpnt->parent->path_index);
       path_table_index += 2;

       for(i =0; i<namelen; i++)
       {
	    path_table_l[path_table_index] = de->isorec.name[i];
	    path_table_m[path_table_index] = de->isorec.name[i];
	    path_table_index++;
       }
       if(path_table_index & 1)
       {
	    path_table_index++;  /* For odd lengths we pad */
       }
  }

  free(pathlist);
  if(path_table_index != path_table_size)
  {
       fprintf(stderr,"Path table lengths do not match %d %d\n",
	       path_table_index,
	       path_table_size);
  }
  return 0;
} /* generate_path_tables(... */

void
FDECL3(memcpy_max, char *, to, char *, from, int, max)
{
  int n = strlen(from);
  if (n > max)
  {
       n = max;
  }
  memcpy(to, from, n);

} /* memcpy_max(... */

void FDECL1(outputlist_insert, struct output_fragment *, frag)
{
  if( out_tail == NULL )
    {
      out_list = out_tail = frag;
    }
  else
    {
      out_tail->of_next = frag;
      out_tail = frag;
    }
}

static int FDECL1(file_write, FILE *, outfile)
{
  int				should_write;
#ifdef APPLE_HYB
  char	buffer[2048];

  memset(buffer, 0, sizeof(buffer));

  if (apple_hyb) {

	int i;

	/* write out padding to round up to HFS allocation block */
	for(i=0;i<hfs_pad;i++)
	    xfwrite(buffer, 1, sizeof(buffer), outfile);

	last_extent_written += hfs_pad;
  }
#endif /* APPLE_HYB */

  /*
   * OK, all done with that crap.  Now write out the directories.
   * This is where the fur starts to fly, because we need to keep track of
   * each file as we find it and keep track of where we put it.
   */

  should_write = last_extent - session_start;

  if( print_size > 0 )
    {
#ifdef APPLE_HYB
      if (apple_hyb)
	fprintf(stderr,"Total extents scheduled to be written (inc HFS) = %d\n",
		last_extent - session_start);
      else
#endif
      fprintf(stderr,"Total extents scheduled to be written = %d\n",
	      last_extent - session_start);
	exit(0);
    }
  if( verbose > 2 )
    {
#ifdef DBG_ISO
      fprintf(stderr,"Total directory extents being written = %d\n", last_extent);
#endif

#ifdef APPLE_HYB
      if (apple_hyb)
	fprintf(stderr,"Total extents scheduled to be written (inc HFS) = %d\n",
		last_extent - session_start);
      else
#endif
      fprintf(stderr,"Total extents scheduled to be written = %d\n",
	      last_extent - session_start);
    }

  /*
   * Now write all of the files that we need.
   */
  write_files(outfile);

#ifdef APPLE_HYB
  /* write out extents/catalog/dt file */
  if (apple_hyb) {

	xfwrite(hce->hfs_ce, hce->hfs_tot_size, HFS_BLOCKSZ, outfile);

	/* round up to a whole CD block */
	if (H_ROUND_UP(hce->hfs_tot_size) - hce->hfs_tot_size*HFS_BLOCKSZ)
	    xfwrite(buffer, 1, H_ROUND_UP(hce->hfs_tot_size) - hce->hfs_tot_size*HFS_BLOCKSZ, outfile);

	last_extent_written += ROUND_UP(hce->hfs_tot_size*HFS_BLOCKSZ)/SECTOR_SIZE;

	/* write out HFS boot block */
	if (mac_boot.name)
	    write_one_file(mac_boot.name, mac_boot.size, outfile, mac_boot.off);
  }
#endif /* APPLE_HYB */

  /*
   * The rest is just fluff.
   */
  if( verbose == 0 )
    {
      return 0;
    }

#ifdef APPLE_HYB
  if (apple_hyb) {
    fprintf(stderr, "Total extents actually written (inc HFS) = %d\n",
      last_extent_written - session_start);
    fprintf(stderr, "(Size of ISO volume = %d, HFS extra = %d)\n",
      last_extent_written - session_start - hfs_extra, hfs_extra);
  }
  else
#else
    fprintf(stderr,"Total extents actually written = %d\n",
	  last_extent_written - session_start);
#endif /* APPLE_HYB */
  /*
   * Hard links throw us off here
   */
  if(should_write != last_extent - session_start)
    {
      fprintf(stderr,"Number of extents written not what was predicted.  Please fix.\n");
      fprintf(stderr,"Predicted = %d, written = %d\n", should_write, last_extent);
    }

  fprintf(stderr,"Total translation table size: %d\n", table_size);
  fprintf(stderr,"Total rockridge attributes bytes: %d\n", rockridge_size);
  fprintf(stderr,"Total directory bytes: %d\n", total_dir_size);
  fprintf(stderr,"Path table size(bytes): %d\n", path_table_size);

#ifdef DEBUG
  fprintf(stderr, "next extent, last_extent, last_extent_written %d %d %d\n",
	  next_extent, last_extent, last_extent_written);
#endif

  return 0;

} /* iso_write(... */

/*
 * Function to write the PVD for the disc.
 */
static int FDECL1(pvd_write, FILE *, outfile)
{
  char				iso_time[17];
  int				should_write;
  struct tm			local;
  struct tm			gmt;


  time(&begun);

  local = *localtime(&begun);
  gmt   = *gmtime(&begun);

  /*
   * This will break  in the year  2000, I supose, but there is no good way
   * to get the top two digits of the year.
   */
  snprintf(iso_time, sizeof iso_time, "%4.4d%2.2d%2.2d%2.2d%2.2d%2.2d00",
	  1900 + local.tm_year,
	  local.tm_mon+1, local.tm_mday,
	  local.tm_hour, local.tm_min, local.tm_sec);

  local.tm_min -= gmt.tm_min;
  local.tm_hour -= gmt.tm_hour;
  local.tm_yday -= gmt.tm_yday;
  iso_time[16] = (local.tm_min + 60*(local.tm_hour + 24*local.tm_yday)) / 15;

  /*
   * Next we write out the primary descriptor for the disc
   */
  memset(&vol_desc, 0, sizeof(vol_desc));
  vol_desc.type[0] = ISO_VD_PRIMARY;
  memcpy(vol_desc.id, ISO_STANDARD_ID, sizeof(ISO_STANDARD_ID));
  vol_desc.version[0] = 1;

  memset(vol_desc.system_id, ' ', sizeof(vol_desc.system_id));
  memcpy_max(vol_desc.system_id, system_id, strlen(system_id));

  memset(vol_desc.volume_id, ' ', sizeof(vol_desc.volume_id));
  memcpy_max(vol_desc.volume_id, volume_id, strlen(volume_id));

  should_write = last_extent - session_start;
  set_733((char *) vol_desc.volume_space_size, should_write);
  set_723(vol_desc.volume_set_size, volume_set_size);
  set_723(vol_desc.volume_sequence_number, volume_sequence_number);
  set_723(vol_desc.logical_block_size, 2048);

  /*
   * The path tables are used by DOS based machines to cache directory
   * locations
   */

  set_733((char *) vol_desc.path_table_size, path_table_size);
  set_731(vol_desc.type_l_path_table, path_table[0]);
  set_731(vol_desc.opt_type_l_path_table, path_table[1]);
  set_732(vol_desc.type_m_path_table, path_table[2]);
  set_732(vol_desc.opt_type_m_path_table, path_table[3]);

  /*
   * Now we copy the actual root directory record
   */
  memcpy(vol_desc.root_directory_record, &root_record,
	 sizeof(struct iso_directory_record) + 1);

  /*
   * The rest is just fluff.  It looks nice to fill in many of these fields,
   * though.
   */
  FILL_SPACE(volume_set_id);
  if(volset_id)  memcpy_max(vol_desc.volume_set_id,  volset_id, strlen(volset_id));

  FILL_SPACE(publisher_id);
  if(publisher)  memcpy_max(vol_desc.publisher_id,  publisher, strlen(publisher));

  FILL_SPACE(preparer_id);
  if(preparer)  memcpy_max(vol_desc.preparer_id,  preparer, strlen(preparer));

  FILL_SPACE(application_id);
  if(appid) memcpy_max(vol_desc.application_id, appid, strlen(appid));

  FILL_SPACE(copyright_file_id);
  if(copyright) memcpy_max(vol_desc.copyright_file_id, copyright,
		       strlen(copyright));

  FILL_SPACE(abstract_file_id);
  if(abstract) memcpy_max(vol_desc.abstract_file_id, abstract,
			  strlen(abstract));

  FILL_SPACE(bibliographic_file_id);
  if(biblio) memcpy_max(vol_desc.bibliographic_file_id, biblio,
		       strlen(biblio));

  FILL_SPACE(creation_date);
  FILL_SPACE(modification_date);
  FILL_SPACE(expiration_date);
  FILL_SPACE(effective_date);
  vol_desc.file_structure_version[0] = 1;
  FILL_SPACE(application_data);

  memcpy(vol_desc.creation_date,  iso_time, 17);
  memcpy(vol_desc.modification_date,  iso_time, 17);
  memcpy(vol_desc.expiration_date, "0000000000000000", 17);
  memcpy(vol_desc.effective_date,  iso_time,  17);

  /*
   * if not a bootable cd do it the old way
   */
  xfwrite(&vol_desc, 1, 2048, outfile);
  last_extent_written++;
  return 0;
}

/*
 * Function to write the EVD for the disc.
 */
static int FDECL1(evd_write, FILE *, outfile)
{
  struct iso_primary_descriptor evol_desc;

  /*
   * Now write the end volume descriptor.  Much simpler than the other one
   */
  memset(&evol_desc, 0, sizeof(evol_desc));
  evol_desc.type[0] = ISO_VD_END;
  memcpy(evol_desc.id, ISO_STANDARD_ID, sizeof(ISO_STANDARD_ID));
  evol_desc.version[0] = 1;
  xfwrite(&evol_desc, 1, 2048, outfile);
  last_extent_written += 1;
  return 0;
}

/*
 * Function to write the EVD for the disc.
 */
static int FDECL1(pathtab_write, FILE *, outfile)
{
  /*
   * Next we write the path tables
   */
  xfwrite(path_table_l, 1, path_blocks << 11, outfile);
  xfwrite(path_table_m, 1, path_blocks << 11, outfile);
  last_extent_written += 2*path_blocks;
  free(path_table_l);
  free(path_table_m);
  path_table_l = NULL;
  path_table_m = NULL;
  return 0;
}

static int FDECL1(exten_write, FILE *, outfile)
{
  xfwrite(extension_record, 1, SECTOR_SIZE, outfile);
  last_extent_written++;
  return 0;
}

/*
 * Functions to describe padding block at the start of the disc.
 */
int FDECL1(oneblock_size, int, starting_extent)
{
  last_extent++;
  return 0;
}

/*
 * Functions to describe padding block at the start of the disc.
 */
static int FDECL1(pathtab_size, int, starting_extent)
{
  path_table[0] = starting_extent;

  path_table[1] = 0;
  path_table[2] = path_table[0] + path_blocks;
  path_table[3] = 0;
  last_extent += 2*path_blocks;
  return 0;
}

static int FDECL1(padblock_size, int, starting_extent)
{
  last_extent += 16;
  return 0;
}

static int file_gen()
{
#ifdef APPLE_HYB
  int start_extent = last_extent;	/* orig ISO files start */
#endif /* APPLE_HYB */
  assign_file_addresses(root);
#ifdef APPLE_HYB
  /* put this here for the time being - may when I've worked out how
     to use Eric's new system for creating/writing parts of the image
     it may move to it's own routine */

  if (apple_hyb)
  {
    int	Csize;				/* clump size for HFS vol */
    int loop = CTC_LOOP;
    int last_extent_save = last_extent;

    /* allocate memory for the libhfs/mkisofs extra info */
    hce = (hce_mem *)e_malloc(sizeof(hce_mem));

    hce->error = (char *)e_malloc(ERROR_SIZE);

    /* mark as unallocated for use later */
    hce->hfs_ce = hce->hfs_hdr = hce->hfs_map = 0;

    /* reserve space for the label partition - if it is needed */
    if (gen_pt)
	hce->hfs_map_size = HFS_MAP_SIZE;
    else
	hce->hfs_map_size = 0;

    /* set the intial factor to increase Catalog file size */
    hce->ctc_size = CTC;

    /* "create" the HFS volume (just the header, catalog/extents files)
	if there's a problem with the Catalog file being too small,
	we keep on increasing the size (up to CTC_LOOP) times and try again.
	Unfortunately I don't know enough about the inner workings of
	HFS, so I can't workout the size of the Catalog file in
	advance (and I don't want to "grow" as is is normally allowed to),
	therefore, this approach is a bit over the top as it involves
	throwing away the "volume" we have created and trying again ...  */
    do
    {
	hce->error[0] = '\0';

	/* attempt to create the Mac volume */
	Csize = make_mac_volume(root, start_extent);

	/* if we have a problem ... */
	if (Csize < 0)
	{
	    /* we've made too many attempts, or got some other error */
	    if (loop == 0 || errno != HCE_ERROR)
	    {
		/* HCE_ERROR is not a valid errno value */
		if (errno == HCE_ERROR)
		     errno = 0;

		/* exit with the error */
		if (*hce->error)
		    fprintf(stderr, "%s\n", hce->error);
		err(1, hfs_error);
	    }
	    else
	    {
		/* increase Catalog file size factor */
		hce->ctc_size *= CTC;

		/* reset the initial "last_extent" and try again */
		last_extent = last_extent_save;
	    }
	}
	else
	    /* everything OK - just carry on ... */
	    loop = 0;
    }
    while (loop--);

    hfs_extra = H_ROUND_UP(hce->hfs_tot_size)/SECTOR_SIZE;

    last_extent += hfs_extra;

    /* generate the Mac label and HFS partition maps */
    mac_boot.name = hfs_boot_file;

    /* only generate the partition tables etc. if we are making a bootable
       CD - or if the -part option is given */
    if (gen_pt) {
      if (gen_mac_label(&mac_boot)) {
	if (*hce->error)
	    fprintf(stderr, "%s\n", hce->error);
	err(1, hfs_error);
      }
    }

    /* set Autostart filename if required */
    if (autoname) {
	if(autostart())
	    errx(1, "Autostart filename must less than 12 characters");
    }

    /* finished with any HFS type errors */
    free(hce->error);
    hce->error = 0;

    /* the ISO files need to start on a multiple of the HFS allocation
       blocks, so find out how much padding we need */

    /* take in accout alignment of files wrt HFS volume start */
    hfs_pad = V_ROUND_UP(start_extent*SECTOR_SIZE + (hce->hfs_hdr_size + hce->hfs_map_size)*HFS_BLOCKSZ, Csize)/SECTOR_SIZE;

    hfs_pad -= (start_extent + (hce->hfs_hdr_size + hce->hfs_map_size)/BLK_CONV);
  }
#endif /* APPLE_HYB */
  return 0;
}

static int dirtree_dump()
{
  if (verbose > 2)
  {
      dump_tree(root);
  }
  return 0;
}

static int FDECL1(dirtree_fixup, int, starting_extent)
{
  if (use_RockRidge && reloc_dir)
	  finish_cl_pl_entries();

  if (use_RockRidge )
	  update_nlink_field(root);
  return 0;
}

static int FDECL1(dirtree_size, int, starting_extent)
{
  assign_directory_addresses(root);
  return 0;
}

static int FDECL1(ext_size, int, starting_extent)
{
  extern int extension_record_size;
  struct directory_entry * s_entry;
  extension_record_extent = starting_extent;
  s_entry = root->contents;
  set_733((char *) s_entry->rr_attributes + s_entry->rr_attr_size - 24,
	  extension_record_extent);
  set_733((char *) s_entry->rr_attributes + s_entry->rr_attr_size - 8,
	  extension_record_size);
  last_extent++;
  return 0;
}

static int FDECL1(dirtree_write, FILE *, outfile)
{
  generate_iso9660_directories(root, outfile);
  return 0;
}

static int FDECL1(dirtree_cleanup, FILE *, outfile)
{
  free_directories(root);
  return 0;
}

static int FDECL1(padblock_write, FILE *, outfile)
{
  char				buffer[2048];
  int				i;
#ifdef APPLE_HYB
  int				n = 0;
#endif /* APPLE_HYB */

  memset(buffer, 0, sizeof(buffer));

#ifdef APPLE_HYB
  if (apple_hyb)
  {
    int		r;		/* HFS hdr output */
    int		tot_size = hce->hfs_map_size + hce->hfs_hdr_size;

    /* get size in CD blocks == 4xHFS_BLOCKSZ == 2048 */
    n = tot_size/BLK_CONV;
    r = tot_size%BLK_CONV;

    /* write out HFS volume header info */
    xfwrite(hce->hfs_map, tot_size, HFS_BLOCKSZ, outfile);

    /* write out any partial CD block */
    if (r)
    {
      xfwrite(buffer, BLK_CONV-r, HFS_BLOCKSZ, outfile);
      n++;
    }
  }

  /* write out the remainder of the ISO header */
  for(i=n; i<16; i++)
#else
  for(i=0; i<16; i++)
#endif /* APPLE_HYB */
    {
      xfwrite(buffer, 1, sizeof(buffer), outfile);
    }

  last_extent_written += 16;
  return 0;
}

#ifdef APPLE_HYB

/*
**	get_adj_size:	get the ajusted size of the volume with the HFS
**			allocation block size for each file
*/
int FDECL1(get_adj_size, int, Csize)
{
	struct deferred_write *dw;
	int     size = 0;
	int	count = 0;

	/* loop through all the files finding the new total size */
	for(dw = dw_head; dw; dw = dw->next)
	{
	    size += V_ROUND_UP(dw->size, Csize);
	    count++;
	}

	/* crude attempt to prevent overflows - HFS can only cope with a
	   maximum of about 65536 forks (actually less) - this will trap
	   cases when we have far too many files */
	if (count >= 65536)
	    return (-1);
	else
	    return(size);
}
/*
**	adj_size:	adjust the ISO record entries for all files
**			based on the HFS allocation block size
*/
int FDECL3(adj_size, int, Csize, int, start_extent, int, extra)
{
	struct deferred_write *dw;
	struct directory_entry *s_entry;
	int	size;

	/* get the adjusted start_extent (with padding) */
	/* take in accout alignment of files wrt HFS volume start */

	start_extent = V_ROUND_UP(start_extent*SECTOR_SIZE + extra *HFS_BLOCKSZ, Csize)/SECTOR_SIZE;

	start_extent -= (extra/BLK_CONV);

	/* initialise file hash */
	flush_hash();

	/* loop through all files changing their starting blocks and
	   finding any padding needed to written out latter */
	for(dw = dw_head; dw; dw = dw->next)
	{
	    s_entry = dw->s_entry;
	    s_entry->starting_block = dw->extent = start_extent;
	    set_733((char *) s_entry->isorec.extent, start_extent);
	    size = V_ROUND_UP(dw->size, Csize)/SECTOR_SIZE;
	    dw->pad = size - ROUND_UP(dw->size)/SECTOR_SIZE;

	    /* cache non-HFS files - as there may be multiple links to
	       these files (HFS files can't have multiple links). We will
	       need to change the starting extent of the other links later */
	    if (!s_entry->hfs_ent)
		add_hash(s_entry);

	    start_extent += size;
	}

	return(start_extent);
}

/*
**	adj_size_other:	adjust any non-HFS files that may be linked
**			to an existing file (i.e. not have a deferred_write
**			entry of it's own
*/
void FDECL1(adj_size_other, struct directory *, dpnt)
{
	struct directory_entry * s_entry;
	struct file_hash *s_hash;

	while (dpnt)
	{
	    s_entry = dpnt->contents;
	    for(s_entry = dpnt->contents; s_entry; s_entry = s_entry->next)
	    {
		/* if it's an HFS file or a directory - then ignore
		   (we're after non-HFS files) */
		if (s_entry->hfs_ent || (s_entry->isorec.flags[0] & 2))
		    continue;

		/* find any cached entry and assign new starting extent */
		s_hash = find_hash(s_entry->dev, s_entry->inode);
		if(s_hash)
		{
		    set_733((char *) s_entry->isorec.extent, s_hash->starting_block);
		    /* not vital - but tidy */
		    s_entry->starting_block = s_hash->starting_block;
		}

	    }
	    if(dpnt->subdir)
	    {
		adj_size_other(dpnt->subdir);
	    }
	    dpnt = dpnt->next;
	}

	/* clear file hash */
	flush_hash();
}

#endif /* APPLE_HYB */

struct output_fragment padblock_desc  = {NULL, padblock_size, NULL,     padblock_write};
struct output_fragment voldesc_desc   = {NULL, oneblock_size, root_gen, pvd_write};
struct output_fragment end_vol	      = {NULL, oneblock_size, NULL,     evd_write};
struct output_fragment pathtable_desc = {NULL, pathtab_size,  generate_path_tables,     pathtab_write};
struct output_fragment dirtree_desc   = {NULL, dirtree_size,  NULL,     dirtree_write};
struct output_fragment dirtree_clean  = {NULL, dirtree_fixup, dirtree_dump,     dirtree_cleanup};
struct output_fragment extension_desc = {NULL, ext_size,      NULL,     exten_write};
struct output_fragment files_desc     = {NULL, NULL,          file_gen, file_write};