/*
 * $Id: ram-output.c,v 0.43 2003/07/12 22:26:34 ceder Exp $
 * Copyright (C) 1991, 1993-1999, 2001-2002  Lysator Academic Computer Association.
 *
 * This file is part of the LysKOM server.
 * 
 * LysKOM 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 1, or (at your option) 
 * any later version.
 * 
 * LysKOM 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 LysKOM; see the file COPYING.  If not, write to
 * Lysator, c/o ISY, Linkoping University, S-581 83 Linkoping, SWEDEN,
 * or the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, 
 * MA 02139, USA.
 *
 * Please mail bug reports to bug-lyskom@lysator.liu.se. 
 */
/*
 * ram-output.c  -  write objects to disk.
 *
 * This is a hack. It shouldn't be used except for debugging and as a
 * temporary substitute for what Willf|r is (or should:-) be doing.
 *
 * Written by ceder 1990-07-13. Rewritten 1990-08-31.
 * Some functions rewritten for speed by Inge Wallin.
 * (It worked - now saving is twice as fast.)
 */


#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <stdio.h>
#include "timewrap.h"
#include <sys/types.h>

#include "s-string.h"
#include "kom-types.h"
#include "ram-output.h"
#include "lyskomd.h"
#include "log.h"
#include "local-to-global.h"

/* Forward declarations. */
static void foutput_aux_item_list(FILE *, const Aux_item_list *);
static void foutput_conf_type (FILE *, Conf_type);
static void foutput_mark(FILE *, Mark);
static void foutput_mark_list(FILE *, const Mark_list);
static void foutput_member(FILE *, Member);
static void foutput_member_list(FILE *, Member_list);
static void foutput_membership_list(FILE *, Membership_list);
static void foutput_misc_info(FILE *, Misc_info);
static void foutput_personal_flags(FILE *, Personal_flags);
static void foutput_priv_bits(FILE *, Priv_bits);
static void foutput_string(FILE *, String);
static void foutput_text_list(FILE *, const Local_to_global *);
static void foutput_time(FILE *, time_t);
static void foutput_ulong(unsigned long, FILE *);


static int output_format = 2;

void
set_output_format(int fmt)
{
    output_format = fmt;
    switch (fmt)
    {
    case 0:
    case 1:
    case 2:
        break;
    default:
        restart_kom("unknown output format selected: %d\n", fmt);
        break;
    }   
}

static void
foutput_info_0(FILE *fp, Info *info)
{
    fprintf(fp, " %lu %lu %lu %lu %lu",
	    (unsigned long)info->conf_pres_conf,
	    (unsigned long)info->pers_pres_conf,
	    (unsigned long)info->motd_conf,
	    (unsigned long)info->kom_news_conf,
	    (unsigned long)info->motd_of_lyskom);
}

static void
foutput_info_2(FILE *fp, Info *info)
{
    fprintf(fp, " %lu %lu %lu %lu %lu %lu",
	    (unsigned long)info->conf_pres_conf,
	    (unsigned long)info->pers_pres_conf,
	    (unsigned long)info->motd_conf,
	    (unsigned long)info->kom_news_conf,
	    (unsigned long)info->motd_of_lyskom,
            (unsigned long)info->highest_aux_no);
    foutput_aux_item_list(fp, &info->aux_item_list);
}


void foutput_info(FILE *fp, Info *info)
{
    switch(output_format)
    {
    case 0:
    case 1:
        foutput_info_0(fp, info);
        break;
    case 2:
        foutput_info_2(fp, info);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }
}


static void
foutput_person_0 (FILE *fp,
                  const Person *person)
{
    foutput_string (fp, person->username);
    foutput_priv_bits (fp, person->privileges);
    foutput_personal_flags (fp, person->flags);

    foutput_text_list (fp, &person->created_texts);
    foutput_mark_list (fp, person->marks);
    foutput_membership_list (fp, person->conferences);

    foutput_time(fp, person->last_login);

    fprintf (fp, " %lu %lu %lu %lu %lu %lu %lu %lu %lu",
	     (unsigned long) person -> user_area,
	     (unsigned long) person -> total_time_present, /* This is not a time,
						     * but a number of seconds.
						     */
	     (unsigned long) person -> sessions,
	     (unsigned long) person -> created_lines,
	     (unsigned long) person -> created_bytes,
	     (unsigned long) person -> read_texts,
	     (unsigned long) person -> no_of_text_fetches,
	     (unsigned long) person -> created_persons,
	     (unsigned long) person -> created_confs);
}

static void
foutput_person_2(FILE *fp,
		 const Person *person)
{
    foutput_string (fp, person->username);
    foutput_priv_bits (fp, person->privileges);
    foutput_personal_flags (fp, person->flags);

    putc(' ', fp);
    l2g_write (fp, &person->created_texts);
    foutput_mark_list (fp, person->marks);
    foutput_membership_list (fp, person->conferences);

    foutput_time(fp, person->last_login);

    fprintf (fp, " %lu %lu %lu %lu %lu %lu %lu %lu %lu",
	     (unsigned long) person -> user_area,
	     (unsigned long) person -> total_time_present, /* This is not a time,
						     * but a number of seconds.
						     */
	     (unsigned long) person -> sessions,
	     (unsigned long) person -> created_lines,
	     (unsigned long) person -> created_bytes,
	     (unsigned long) person -> read_texts,
	     (unsigned long) person -> no_of_text_fetches,
	     (unsigned long) person -> created_persons,
	     (unsigned long) person -> created_confs);
}

extern void
foutput_person (FILE *fp,
                const Person *person)
{
    switch(output_format)
    {
    case 0:
    case 1:
        foutput_person_0(fp, person);
        break;
    case 2:
        foutput_person_2(fp, person);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }
}


static void
foutput_conference_2(FILE *fp,
		     const Conference *conf_c)
{
    foutput_string(fp, conf_c->name);
    foutput_member_list(fp, conf_c->members);
    putc(' ', fp);
    l2g_write(fp, &conf_c->texts);
    foutput_conf_type(fp, conf_c->type);

    foutput_time(fp, conf_c -> creation_time );
    foutput_time(fp, conf_c -> last_written );

    fprintf (fp, " %lu %lu %lu %lu %lu %lu %lu",
	     (unsigned long) conf_c -> creator,
	     (unsigned long) conf_c -> presentation,
	     (unsigned long) conf_c -> supervisor,
	     (unsigned long) conf_c -> permitted_submitters,
	     (unsigned long) conf_c -> super_conf,
	     (unsigned long) conf_c -> msg_of_day,
	     (unsigned long) conf_c -> nice);
    foutput_ulong((unsigned long) conf_c->keep_commented, fp);
    foutput_ulong((unsigned long) conf_c->expire, fp);
    foutput_ulong((unsigned long) conf_c->highest_aux, fp);
    foutput_aux_item_list(fp, &conf_c->aux_item_list);
}

static void
foutput_conference_1 (FILE *fp,
		    Conference *conf_c)
{
    foutput_string(fp, conf_c->name);
    foutput_member_list(fp, conf_c->members);
    foutput_text_list(fp, &conf_c->texts);
    foutput_conf_type(fp, conf_c->type);

    foutput_time(fp, conf_c -> creation_time );
    foutput_time(fp, conf_c -> last_written );

    fprintf (fp, " %lu %lu %lu %lu %lu %lu %lu",
	     (unsigned long) conf_c -> creator,
	     (unsigned long) conf_c -> presentation,
	     (unsigned long) conf_c -> supervisor,
	     (unsigned long) conf_c -> permitted_submitters,
	     (unsigned long) conf_c -> super_conf,
	     (unsigned long) conf_c -> msg_of_day,
	     (unsigned long) conf_c -> nice);
}

static void
foutput_conference_0 (FILE *fp,
                      Conference *conf_c)
{
    foutput_string(fp, conf_c->name);
    foutput_member_list(fp, conf_c->members);
    foutput_text_list(fp, &conf_c->texts);
    foutput_conf_type(fp, conf_c->type);

    foutput_time(fp, conf_c -> creation_time );
    foutput_time(fp, conf_c -> last_written );

    fprintf (fp, " %lu %lu %lu %lu %lu %lu %lu",
	     (unsigned long) conf_c -> creator,
	     (unsigned long) conf_c -> presentation,
	     (unsigned long) conf_c -> supervisor,
	     (unsigned long) conf_c -> permitted_submitters,
	     (unsigned long) conf_c -> super_conf,
	     (unsigned long) conf_c -> msg_of_day,
	     (unsigned long) conf_c -> nice);
}

void foutput_conference(FILE *fp,
                        Conference *conf_c)
{
    switch(output_format)
    {
    case 0:
        foutput_conference_0(fp, conf_c);
        break;
    case 1:
        foutput_conference_1(fp, conf_c);
        break;
    case 2:
        foutput_conference_2(fp, conf_c);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }
}



static void
foutput_text_stat_0(FILE *fp,
                    Text_stat *t_stat)
{
    int i;

    foutput_time(fp, t_stat->creation_time);
    
    foutput_ulong((unsigned long) t_stat->author, fp);
    foutput_ulong((unsigned long) t_stat->file_pos, fp);
    foutput_ulong((unsigned long) t_stat->no_of_lines, fp);
    foutput_ulong((unsigned long) t_stat->no_of_chars, fp);
    foutput_ulong((unsigned long) t_stat->no_of_marks, fp);
    foutput_ulong((unsigned long) t_stat->no_of_misc, fp);

    if ( t_stat->misc_items != NULL && t_stat->no_of_misc > 0 )
    {
	fputs(" {", fp);
	for ( i = 0; i < t_stat->no_of_misc; i++ )
	    foutput_misc_info(fp, t_stat->misc_items[ i ]);
	fputs(" }", fp);
    }
    else
	fputs(" *", fp);
}

static void
foutput_text_stat_2(FILE *fp,
                    Text_stat *t_stat)
{
    int i;

    foutput_time(fp, t_stat->creation_time);
    
    foutput_ulong((unsigned long) t_stat->author, fp);
    foutput_ulong((unsigned long) t_stat->file_pos, fp);
    foutput_ulong((unsigned long) t_stat->no_of_lines, fp);
    foutput_ulong((unsigned long) t_stat->no_of_chars, fp);
    foutput_ulong((unsigned long) t_stat->no_of_marks, fp);
    foutput_ulong((unsigned long) t_stat->no_of_misc, fp);

    if ( t_stat->misc_items != NULL && t_stat->no_of_misc > 0 )
    {
	fputs(" {", fp);
	for ( i = 0; i < t_stat->no_of_misc; i++ )
	    foutput_misc_info(fp, t_stat->misc_items[ i ]);
	fputs(" }", fp);
    }
    else
	fputs(" *", fp);

    foutput_ulong((unsigned long) t_stat->highest_aux, fp);
    foutput_aux_item_list(fp, &t_stat->aux_item_list);
}

void
foutput_text_stat(FILE *fp,
                  Text_stat *t_stat)
{
    switch (output_format)
    {
    case 0:
    case 1:
        foutput_text_stat_0(fp, t_stat);
        break;
    case 2:
        foutput_text_stat_2(fp, t_stat);
        break;
    default:
        restart_kom("unknown database format: %d\n", output_format);
        break;
    }
}



static void
foutput_aux_flags(FILE *fp,
                  Aux_item_flags f)
{
    putc(' ', fp);
    putc(f.deleted + '0', fp);
    putc(f.inherit + '0', fp);
    putc(f.secret + '0', fp);
    putc(f.hide_creator + '0', fp);
    putc(f.dont_garb + '0', fp);
    putc(f.reserved3 + '0', fp);
    putc(f.reserved4 + '0', fp);
    putc(f.reserved5 + '0', fp);
}

static void
foutput_aux_item_link(FILE *fp,
                      Aux_item_link *link)
{
    foutput_ulong((unsigned long) link->target_type, fp);
    foutput_ulong((unsigned long) link->target_item, fp);
    switch (link->target_type)
    {
    case CONF_OBJECT_TYPE:
        foutput_ulong((unsigned long) link->target_object.conf, fp);
        break;
    case TEXT_OBJECT_TYPE:
        foutput_ulong((unsigned long) link->target_object.text, fp);
        break;
    default:
	;
    }
}

static void
foutput_aux_item(FILE *fp,
                 Aux_item *a_item)
{
    foutput_ulong((unsigned long) a_item->aux_no, fp);
    foutput_ulong((unsigned long) a_item->tag, fp);
    foutput_ulong((unsigned long) a_item->creator, fp);
    foutput_time(fp, a_item->sent_at);
    foutput_aux_flags(fp, a_item->flags);
    foutput_ulong((unsigned long) a_item->inherit_limit, fp);
    foutput_string(fp, a_item->data);
    foutput_aux_item_link(fp, &a_item->linked_item);
}

static void
foutput_aux_item_list(FILE *fp,
		      const Aux_item_list *aux)
{
    int i;

    foutput_ulong((unsigned long) aux->length, fp);
    if (aux->items && aux->length > 0)
    {
        fputs(" {", fp);
        for (i = 0; i < aux->length; i++)
            foutput_aux_item(fp, &aux->items[i]);
        fputs(" }", fp);
    }
    else
        fputs(" *", fp);
}
		      

static void
foutput_membership_type(FILE *fp,
                        Membership_type type)
{
    putc(' ', fp);
    putc(type.invitation + '0', fp);
    putc(type.passive    + '0', fp);
    putc(type.secret     + '0', fp);
    putc(type.passive_message_invert + '0', fp);
    putc(type.reserved2  + '0', fp);
    putc(type.reserved3  + '0', fp);
    putc(type.reserved4  + '0', fp);
    putc(type.reserved5  + '0', fp);
}

static void
foutput_read_ranges_0(FILE *fp,
		      Membership *mship)
{
    if (mship->read_ranges == NULL && mship->no_of_read_ranges != 0 )
    {
	kom_log("foutput_read_ranges_0(): no_of_read_ranges forced to 0"
		" in a membership in %lu.\n", (unsigned long)mship->conf_no);
	mship->no_of_read_ranges = 0;
    }

    if (mship->no_of_read_ranges == 0)
	fprintf(fp, " 0 0 *");
    else
    {
	struct read_range *begin;
	struct read_range *end;

	begin = &mship->read_ranges[0];
	end = begin + mship->no_of_read_ranges;

	if (begin->first_read == 1)
	{
	    fprintf(fp, " %lu", begin->last_read);
	    begin++;
	}
	else
	    fprintf(fp, " 0");

	if (begin == end)
	    fprintf(fp, " 0 *");
	else
	{
	    unsigned long no_of_read = 0;
	    const struct read_range *ptr;

	    for (ptr = begin; ptr < end; ++ptr)
		no_of_read += ptr->last_read - ptr->first_read + 1;

	    fprintf(fp, " %lu {", no_of_read);
	    
	    for (ptr = begin; ptr < end; ++ptr)
	    {
		Local_text_no lno;

		for (lno = ptr->first_read; lno <= ptr->last_read; lno++)
		    fprintf(fp, " %lu", (unsigned long)lno);
	    }
	    
	    fprintf(fp, " }");
	}
    }
}

static void
foutput_membership_0(FILE *fp,
		   Membership *mship)
{
    foutput_time(fp, mship->last_time_read );
    
    fprintf(fp, " %lu %lu",
	    (unsigned long)mship->conf_no,
	    (unsigned long)mship->priority);
    foutput_read_ranges_0(fp, mship);
}

static void
foutput_membership_2(FILE *fp,
                     Membership *mship)
{
    foutput_time(fp, mship->last_time_read );
    
    fprintf(fp, " %lu %lu",
	    (unsigned long)mship->conf_no,
	    (unsigned long)mship->priority);
    foutput_read_ranges_0(fp, mship);
    fprintf(fp, " %lu", (unsigned long)mship->added_by);
    foutput_time(fp, mship->added_at);
    foutput_membership_type(fp, mship->type);
}


extern void
foutput_membership(FILE *fp,
                   Membership *mship)
{
    switch (output_format)
    {
    case 0:
    case 1:
        foutput_membership_0(fp, mship);
        break;
    case 2:
        foutput_membership_2(fp, mship);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }
}



static void
foutput_string(FILE *fp,
	       String str)
{
    foutput_ulong((unsigned long)str.len, fp);
    putc('H', fp);

    if (str.len)
	fwrite(str.string, str.len, 1, fp);
}

static void
foutput_priv_bits(FILE *fp,
		  Priv_bits bits)
{
    putc(' ', fp);
    putc(bits.wheel + '0', fp);
    putc(bits.admin + '0', fp);
    putc(bits.statistic + '0', fp);
    putc(bits.create_pers + '0', fp);
    putc(bits.create_conf + '0', fp);
    putc(bits.change_name + '0', fp);
    putc(bits.flg7 + '0', fp);
    putc(bits.flg8 + '0', fp);
    putc(bits.flg9 + '0', fp);
    putc(bits.flg10 + '0', fp);
    putc(bits.flg11 + '0', fp);
    putc(bits.flg12 + '0', fp);
    putc(bits.flg13 + '0', fp);
    putc(bits.flg14 + '0', fp);
    putc(bits.flg15 + '0', fp);
    putc(bits.flg16 + '0', fp);
}

static void
foutput_personal_flags(FILE *fp,
		       Personal_flags flags)
{
    putc(' ', fp);
    putc(flags.unread_is_secret + '0', fp);
    putc(flags.flg2 + '0', fp);
    putc(flags.flg3 + '0', fp);
    putc(flags.flg4 + '0', fp);
    putc(flags.flg5 + '0', fp);
    putc(flags.flg6 + '0', fp);
    putc(flags.flg7 + '0', fp);
    putc(flags.flg8 + '0', fp);
}	


static void
foutput_text_list(FILE *fp,
		  const Local_to_global *text_list)
{
    Local_text_no first;
    Local_text_no end;

    first = l2g_next_key(text_list, 0);
    end = l2g_first_appendable_key(text_list);

    if (first == 0)
	first = end;
    
    foutput_ulong((unsigned long)first, fp);
    foutput_ulong((unsigned long)(end - first), fp);

    if (first < end)
    {
	fputs(" {", fp);
	while (first < end)
	    foutput_ulong((unsigned long)l2g_lookup(text_list, first++), fp);
	fputs(" }", fp);
    }
    else
	fprintf(fp, " *");
}


static void
foutput_mark_list(FILE *fp,
		  const Mark_list mark_list)
{
    int i;

    fprintf(fp, " %lu", (unsigned long)mark_list.no_of_marks);

    if ( mark_list.marks != NULL && mark_list.no_of_marks > 0 )
    {
	fprintf(fp, " {");
	for ( i = 0; i < mark_list.no_of_marks; i++ )
	    foutput_mark(fp, mark_list.marks[ i ]);
	fprintf(fp, " }");
    }
    else
	fprintf(fp, " *");
    
}


static void
foutput_mark(FILE *fp,
	     Mark mark)
{
    fprintf(fp, " %lu %lu", (unsigned long)mark.text_no, (unsigned long)mark.mark_type);
}

static void
foutput_membership_list_0 (FILE		* fp,
                           Membership_list  mlist)
{
    int i;
    
    fprintf(fp, " %lu", (unsigned long)mlist.no_of_confs);

    if ( mlist.confs != NULL && mlist.no_of_confs > 0 )
    {
	fprintf(fp, " {");
	for ( i = 0; i < mlist.no_of_confs; i++)
	    foutput_membership_0(fp, mlist.confs + i);
	fprintf(fp, " }");
    }
    else
	fprintf(fp, " *");
}

static void
foutput_membership_list_2 (FILE		* fp,
                           Membership_list  mlist)
{
    int i;
    
    fprintf(fp, " %lu", (unsigned long)mlist.no_of_confs);

    if ( mlist.confs != NULL && mlist.no_of_confs > 0 )
    {
	fprintf(fp, " {");
	for ( i = 0; i < mlist.no_of_confs; i++)
	    foutput_membership_2(fp, mlist.confs + i);
	fprintf(fp, " }");
    }
    else
	fprintf(fp, " *");
}

static void
foutput_membership_list(FILE        * fp,
                        Membership_list mlist)
{
    switch (output_format)
    {
    case 0:
    case 1:
        foutput_membership_list_0(fp, mlist);
        break;
    case 2:
        foutput_membership_list_2(fp, mlist);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }    
}

static void
foutput_time(FILE *fp,
	     time_t clk)
{
    foutput_ulong((unsigned long) clk, fp);
}


static void
foutput_member_list(FILE *fp,
		    Member_list m_list)
{
    int i;

    fprintf(fp, " %lu", (unsigned long)m_list.no_of_members);
    if ( m_list.members != NULL && m_list.no_of_members > 0 )
    {
	fprintf(fp, " {");
	for ( i = 0; i < m_list.no_of_members; i++ )
	    foutput_member(fp, m_list.members[ i ]);
	fprintf(fp, " }");
    }
    else
	fprintf(fp, " *");
}


static void
foutput_member_0(FILE *fp,
                 Member member)
{
    fprintf(fp, " %lu", (unsigned long)member.member);
}

static void
foutput_member_2(FILE *fp,
                 Member member)
{
    fprintf(fp, " %lu %lu",
            (unsigned long)member.member,
            (unsigned long)member.added_by);
    foutput_time(fp, member.added_at);
    foutput_membership_type(fp, member.type);
}

static void
foutput_member(FILE *fp,
	       Member member)
{
    switch (output_format)
    {
    case 0:
    case 1:
        foutput_member_0(fp, member);
        break;
    case 2:
        foutput_member_2(fp, member);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }
}

static void
foutput_conf_type_1(FILE *fp,
                    Conf_type type)
{
    putc(' ', fp);
    putc(type.rd_prot + '0', fp);
    putc(type.original + '0', fp);
    putc(type.secret + '0', fp);
    putc(type.letter_box + '0', fp);
    putc(type.allow_anon + '0', fp);
    putc(type.forbid_secret + '0', fp);
    putc(type.reserved2 + '0', fp);
    putc(type.reserved3 + '0', fp);
}

static void
foutput_conf_type_0(FILE *fp,
                    Conf_type type)
{
    putc(' ', fp);
    putc(type.rd_prot + '0', fp);
    putc(type.original + '0', fp);
    putc(type.secret + '0', fp);
    putc(type.letter_box + '0', fp);
}

static void
foutput_conf_type (FILE *fp,
                   Conf_type type)
{
    switch (output_format)
    {
    case 0:
        foutput_conf_type_0(fp, type);
        break;
    case 1:
    case 2:
        foutput_conf_type_1(fp, type);
        break;
    default:
        restart_kom("unknown database format: %d", output_format);
        break;
    }
}


static void
foutput_misc_info(FILE *fp, 
		  Misc_info misc)
{
    foutput_ulong((unsigned long)misc.type, fp);
    
    switch(misc.type)
    {
    case recpt:
    case cc_recpt:
    case bcc_recpt:
	foutput_ulong((unsigned long)misc.datum.recipient, fp);
	break;

    case loc_no:
	foutput_ulong((unsigned long)misc.datum.local_no, fp);
	break;
	
    case rec_time:
	foutput_time(fp, misc.datum.received_at);
	break;
	
    case comm_to:
    case comm_in:
    case footn_to:
    case footn_in:
	foutput_ulong((unsigned long)misc.datum.text_link, fp);
	break;
	
    case sent_by:
	foutput_ulong((unsigned long)misc.datum.sender, fp);
	break;
	
    case sent_at:
	foutput_time(fp, misc.datum.sent_at);
	break;

#ifndef COMPILE_CHECKS
    default:
#endif
    case unknown_info:
	restart_kom("prot_a_output_misc_info: Illegal misc\n");
    }
}


/* 
 * Output the unsigned long L in the fastest way possible to the file
 * FP. Ok, it's ugly, but it's fast (or is it?).
 */

static void
foutput_ulong (unsigned long l,
	       FILE *fp)
{
    static char   buf[sizeof(unsigned long) * 3 + 1];
    char         *cp;

    putc(' ', fp);
    if (l < 10)
	putc("0123456789"[l], fp);
    else
    {
	cp = buf + sizeof(buf);
	while (l > 0)
	{
	    *--cp = (l % 10) + '0';
	    l /= 10;
	}
	fwrite(cp, buf + sizeof(buf) - cp, 1, fp);
    }
}