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- /*
- ** ACE Message Ports.
- ** 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: 15th February 1994,
- ** 22nd August 1994,
- ** 1st September 1994
- */
-
- #include "acedef.h"
- #include <string.h>
-
- /* locals */
- static char *frame_ptr[] = {"(a4)", "(a5)"};
-
- /* externals */
- extern int sym;
- extern int typ;
- extern int obj;
- extern int lev;
- extern char id[MAXIDSIZE];
- extern SYM *curr_item;
-
- /* functions */
- void message_open (void)
- {
- /*
- ** MESSAGE OPEN [#]channel,port-name,mode
- */
- int mtype;
-
- insymbol ();
-
- if (sym == hash)
- insymbol ();
-
- mtype = expr ();
-
- if (mtype == stringtype)
- _error (4);
- else
- {
- /* channel */
- if (make_integer (mtype) == shorttype)
- make_long ();
-
- if (sym != comma)
- _error (16);
- else
- {
- /* port-name */
- insymbol ();
- if (expr () != stringtype)
- _error (4);
- else
- {
- if (sym != comma)
- _error (16);
- else
- {
- /* mode (r,R,w,W) */
- insymbol ();
- if (expr () != stringtype)
- _error (4);
- else
- {
- /* call function */
- gen ("jsr", "_MessageOpen", " ");
- gen ("add.l", "#12", "sp");
- enter_XREF ("_MessageOpen");
- }
- }
- }
- }
-
- }
- }
-
- void message_read (void)
- {
- /*
- ** MESSAGE READ [#]channel,message-string
- */
- int mtype;
- SYM *storage;
- char addrbuf[40];
-
- insymbol ();
-
- if (sym == hash)
- insymbol ();
-
- mtype = expr ();
-
- if (mtype == stringtype)
- _error (4);
- else
- {
- /* channel */
- if (make_integer (mtype) == shorttype)
- make_long ();
-
- if (sym != comma)
- _error (16);
- else
- {
- /*
- ** Message string.
- */
- insymbol ();
- if (sym == ident && obj == variable)
- {
- /*
- ** If string variable/array doesn't exist,
- ** create a simple variable.
- */
- if (!exist (id, variable) && !exist (id, array))
- {
- /*
- ** Allocate a simple string variable.
- */
- enter (id, typ, obj, 0);
- enter_DATA("_nullstring:", "dc.b 0");
- gen ("pea", "_nullstring", " ");
- assign_to_string_variable (curr_item,
- MAXSTRLEN);
- }
-
- storage = curr_item;
-
- /*
- ** Is it a string variable or array?
- */
- if (storage->type != stringtype)
- _error (4);
- else
- {
- /*
- ** Get address of string pointed to
- ** by variable/array element.
- */
- itoa (-1 * storage->address, addrbuf, 10);
- strcat (addrbuf, frame_ptr[lev]);
-
- /*
- ** Pass string address to function
- ** (on stack).
- */
- if (storage->object == array)
- {
- point_to_array (storage, addrbuf);
- gen ("move.l", addrbuf, "d0");
- gen ("add.l", "d7", "d0");
- gen ("move.l", "d0", "-(sp)");
- }
- else
- gen ("move.l", addrbuf, "-(sp)");
-
- insymbol ();
-
- /* call function */
- gen ("jsr", "_MessageRead", " ");
- gen ("addq", "#8", "sp");
- enter_XREF ("_MessageRead");
- }
- }
- else
- _error (19); /* variable or array expected */
- }
-
- }
- }
-
- void message_write (void)
- {
- /*
- ** MESSAGE WRITE [#]channel,message-string
- */
- int mtype;
-
- insymbol ();
-
- if (sym == hash)
- insymbol ();
-
- mtype = expr ();
-
- if (mtype == stringtype)
- _error (4);
- else
- {
- /* channel */
- if (make_integer (mtype) == shorttype)
- make_long ();
-
- if (sym != comma)
- _error (16);
- else
- {
- /* message-string */
- insymbol ();
- if (expr () != stringtype)
- _error (4);
- else
- {
- /* call function */
- gen ("jsr", "_MessageWrite", " ");
- gen ("addq", "#8", "sp");
- enter_XREF ("_MessageWrite");
- }
- }
-
- }
- }
-
- void message_wait (void)
- {
- /*
- ** MESSAGE WAIT [#]channel
- */
- int mtype;
-
- insymbol ();
-
- if (sym == hash)
- insymbol ();
-
- mtype = expr ();
-
- if (mtype == stringtype)
- _error (4);
- else
- {
- /* channel */
- if (make_integer (mtype) == shorttype)
- make_long ();
-
- /* call function */
- gen ("jsr", "_MessageWait", " ");
- gen ("addq", "#4", "sp");
- enter_XREF ("_MessageWait");
- }
- }
-
- void message_clear (void)
- {
- /*
- ** MESSAGE CLEAR [#]channel
- */
- int mtype;
-
- insymbol ();
-
- if (sym == hash)
- insymbol ();
-
- mtype = expr ();
-
- if (mtype == stringtype)
- _error (4);
- else
- {
- /* channel */
- if (make_integer (mtype) == shorttype)
- make_long ();
-
- /* call function */
- gen ("jsr", "_MessageClear", " ");
- gen ("addq", "#4", "sp");
- enter_XREF ("_MessageClear");
- }
- }
-
- void message_close (void)
- {
- /*
- ** MESSAGE CLOSE [#]channel
- */
- int mtype;
-
- insymbol ();
-
- if (sym == hash)
- insymbol ();
-
- mtype = expr ();
-
- if (mtype == stringtype)
- _error (4);
- else
- {
- /* channel */
- if (make_integer (mtype) == shorttype)
- make_long ();
-
- /* call function */
- gen ("jsr", "_MessageClose", " ");
- gen ("addq", "#4", "sp");
- enter_XREF ("_MessageClose");
- }
- }
-
- void message (void)
- {
- /*
- ** MESSAGE OPEN|CLOSE|READ|WRITE|WAIT|CLEAR
- */
-
- insymbol ();
-
- switch (sym)
- {
- case opensym:
- message_open ();
- break;
- case closesym:
- message_close ();
- break;
-
- case readsym:
- message_read ();
- break;
- case writesym:
- message_write ();
- break;
-
- case waitsym:
- message_wait ();
- break;
- case clearsym:
- message_clear ();
- break;
-
- default:
- _error (77);
- break;
- }
- }
-