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/*##############################################################################
FUNNNELWEB COPYRIGHT
====================
FunnelWeb is a literate-programming macro preprocessor.
The FunnelWeb web is at http://www.ross.net/funnelweb/
Copyright (c) Ross N. Williams 1992. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of Version 2 of the GNU General Public License as
published by the Free Software Foundation (http://www.gnu.org/).
This program is distributed WITHOUT ANY WARRANTY; without even the implied
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See Version 2 of the GNU General Public License for more details.
You should have received a copy of Version 2 of the GNU General Public
License along with this program. If not, you can obtain a copy as follows:
ftp://prep.ai.mit.edu/pub/gnu/COPYING-2.0
or write to:
Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
Section 2a of the license requires that all changes to this file be
recorded prominently in this file. Please record all changes here.
Programmers:
RNW Ross N. Williams (ross@ross.net)
Changes:
07-May-1992 RNW Program prepared for release under GNU GPL V2.
##############################################################################*/
/******************************************************************************/
/* SECTION.C */
/******************************************************************************/
#include "style.h"
#include "as.h"
#include "section.h"
/******************************************************************************/
#define MAGIC (89201129L) /* Magic number detects uninitialized sections. */
#define SECMAX (30000L) /* Maximum value of a single level's section num. */
/******************************************************************************/
LOCAL void sn_chk P_((p_sn_t));
LOCAL void sn_chk(p_sn)
/* Checks that the given section object has a legal internal state. */
p_sn_t p_sn;
{
ubyte i;
as_cold(p_sn->sn_magic==MAGIC,"sn_chk: Section has bad magic number.");
as_cold(p_sn->sn_lev<=SECLEV_MAX,
"sn_chk: Section has bad level number.");
for (i=1;i<=p_sn->sn_lev;i++)
as_cold(p_sn->sn_num[i]>0,
"sn_chk: Section has zero hierarchical number.");
}
/******************************************************************************/
EXPORT void sn_ini(p_sn)
p_sn_t p_sn;
{
p_sn->sn_magic = MAGIC;
p_sn->sn_lev = 0;
}
/******************************************************************************/
EXPORT void sn_set(p_sn,level)
p_sn_t p_sn;
ubyte level;
{
ubyte i;
sn_chk(p_sn);
as_cold(level>0 && level<=SECLEV_MAX,
"sn_set: Specified level is too high.");
p_sn->sn_lev=level;
for(i=1;i<=level;i++)
p_sn->sn_num[i]=1;
}
/******************************************************************************/
EXPORT void sn_inc (p_sn,lev)
p_sn_t p_sn;
ubyte lev;
{
sn_chk(p_sn);
/* Check the parameter level. */
as_cold(1<=lev && lev<=SECLEV_MAX,"sn_inc: Bad level number specified.");
/* Check that we are not skipping a hierarchical level. */
as_cold(lev<=p_sn->sn_lev+1,"sn_inc: Discountinuous level increment.");
/* Actually increment the section. */
if (lev==p_sn->sn_lev+1) p_sn->sn_num[lev]=0;
p_sn->sn_lev=lev;
p_sn->sn_num[lev]++;
/* Check that the section number hasn't got too big. */
as_cold(p_sn->sn_num[lev]<=SECMAX,"sn_inc: Section number is too large.");
}
/******************************************************************************/
EXPORT ubyte sn_lev(p_sn)
p_sn_t p_sn;
{
sn_chk(p_sn);
return p_sn->sn_lev;
}
/******************************************************************************/
EXPORT void sn_str(p_sn,s)
p_sn_t p_sn;
char *s;
{
char t[20];
ubyte i;
sn_chk(p_sn);
s[0]=EOS;
for (i=1;i<=p_sn->sn_lev;i++)
{
if (i>1) strcat(s,".");
sprintf(t,"%u",(unsigned) p_sn->sn_num[i]);
strcat(s,t);
}
}
/******************************************************************************/
/* End of SECTION.C */
/******************************************************************************/
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