home *** CD-ROM | disk | FTP | other *** search
- /*
- ** ACE IFF commands.
- ** Copyright (C) 1998 David Benn
- **
- ** 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
- ** of the License, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- **
- ** Author: David J Benn
- ** Date: 27th February 1994,
- ** 10th,11th,19th August 1994
- */
-
- #include "acedef.h"
-
- /* externals */
- extern int sym;
- extern BOOL iffused;
-
- /* functions */
- void iff_open()
- {
- /*
- ** IFF OPEN [#]channel,file-name
- */
- int itype;
-
- insymbol();
-
- if (sym == hash) insymbol();
-
- itype = expr();
-
- if (itype == stringtype)
- _error(4);
- else
- {
- /* channel */
- if (make_integer(itype) == shorttype) make_long();
-
- if (sym != comma)
- _error(16);
- else
- {
- /* picture file name */
- insymbol();
- if (expr() != stringtype)
- _error(4);
- else
- {
- /* call function */
- gen("jsr","_IFFPicOpen"," ");
- gen("addq","#8","sp");
- enter_XREF("_IFFPicOpen");
- }
- }
-
- }
- }
-
- void iff_read()
- {
- /*
- ** IFF READ [#]channel[,screen-id]
- */
- int itype;
-
- insymbol();
-
- if (sym == hash) insymbol();
-
- itype = expr();
-
- if (itype == stringtype)
- _error(4);
- else
- {
- /* channel */
- if (make_integer(itype) == shorttype) make_long();
-
- if (sym != comma)
- /* no screen-id */
- gen("move.l","#-1","-(sp)");
- else
- {
- /* screen-id */
-
- insymbol();
-
- itype = expr();
-
- if (itype == stringtype)
- _error(4);
- else
- {
- if (make_integer(itype) == shorttype)
- make_long();
-
- }
- }
-
- /* call function */
- gen("jsr","_IFFPicRead"," ");
- gen("addq","#8","sp");
- enter_XREF("_IFFPicRead");
- }
- }
-
- void iff_close()
- {
- /*
- ** IFF CLOSE [#]channel
- */
- int itype;
-
- insymbol();
-
- if (sym == hash) insymbol();
-
- itype = expr();
-
- if (itype == stringtype)
- _error(4);
- else
- {
- /* channel */
- if (make_integer(itype) == shorttype) make_long();
-
- /* call function */
- gen("jsr","_IFFPicClose"," ");
- gen("addq","#4","sp");
- enter_XREF("_IFFPicClose");
- }
- }
-
- void iff()
- {
- /* IFF OPEN | READ | CLOSE */
-
- insymbol();
-
- switch(sym)
- {
- case opensym : iff_open(); break;
- case readsym : iff_read(); break;
- case closesym : iff_close(); break;
- }
-
- /*
- ** All three require intuition.library.
- */
- enter_XREF("_IntuitionBase");
-
- /*
- ** We need to tell ACE to create/delete ILBM.library.
- */
- iffused = TRUE;
- }
-