mirror of
https://github.com/Interlisp/maiko.git
synced 2026-01-24 03:07:12 +00:00
b1790bb7fe
modified: src/allocmds.c modified: src/array5.c modified: src/car-cdr.c modified: src/dbgtool.c modified: src/ether.c modified: src/gc2.c modified: src/gcfinal.c modified: src/gcmain3.c modified: src/gcrcell.c modified: src/initkbd.c modified: src/initsout.c modified: src/keyevent.c modified: src/keylib.c modified: src/keymaker.c modified: src/keytst.c modified: src/loopsops.c modified: src/lsthandl.c modified: src/main.c modified: src/mkatom.c modified: src/mkcell.c modified: src/mvs.c modified: src/storage.c modified: src/testtool.c modified: src/unixcomm.c modified: src/vars3.c modified: src/xc.c modified: src/z2.c
126 lines
3.6 KiB
C
126 lines
3.6 KiB
C
/* $Id: lsthandl.c,v 1.4 1999/05/31 23:35:38 sybalsky Exp $ (C) Copyright Venue, All Rights Reserved
|
|
*/
|
|
static char *id = "$Id: lsthandl.c,v 1.4 1999/05/31 23:35:38 sybalsky Exp $ Copyright (C) Venue";
|
|
|
|
/************************************************************************/
|
|
/* */
|
|
/* (C) Copyright 1989-99 Venue. All Rights Reserved. */
|
|
/* Manufactured in the United States of America. */
|
|
/* */
|
|
/************************************************************************/
|
|
|
|
/************************************************************************/
|
|
/*
|
|
Including : OP_fmemb
|
|
OP_listget
|
|
|
|
*/
|
|
/**********************************************************************/
|
|
|
|
#include "version.h"
|
|
|
|
#include "lispemul.h"
|
|
#include "emlglob.h"
|
|
#include "lspglob.h"
|
|
#include "lsptypes.h"
|
|
#include "address.h"
|
|
#include "adr68k.h"
|
|
#include "cell.h"
|
|
|
|
#include "lsthandldefs.h"
|
|
#include "car-cdrdefs.h"
|
|
#include "vars3defs.h"
|
|
|
|
/***********************************************************************/
|
|
/* N_OP_fmemb */
|
|
/**********************************************************************/
|
|
|
|
LispPTR N_OP_fmemb(register LispPTR item, register LispPTR tos) { /* OP 34Q */
|
|
|
|
while (Listp(tos)) {
|
|
if (item == car(tos)) return tos;
|
|
tos = cdr(tos);
|
|
/* if we get an interrupt, punt so we can handle it safely */
|
|
if (!Irq_Stk_End) { TIMER_EXIT(tos); }
|
|
}
|
|
if (tos) ERROR_EXIT(tos);
|
|
return tos;
|
|
|
|
} /* N_OP_fmemb end */
|
|
|
|
/***********************************************************************/
|
|
/*
|
|
Func Name : fmemb(item,list)
|
|
>>For User programming<<
|
|
NOTE: You should not handle long list, because it doesn't care
|
|
about interrupt.
|
|
|
|
*/
|
|
/**********************************************************************/
|
|
|
|
LispPTR fmemb(register LispPTR item, register LispPTR list) {
|
|
while (Listp(list)) {
|
|
if (item == car(list)) return (list);
|
|
list = cdr(list);
|
|
}
|
|
|
|
if (list) return (list);
|
|
return (list);
|
|
|
|
} /* fmemb end */
|
|
|
|
/***********************************************************************/
|
|
/*
|
|
Func Name : N_OP_listget
|
|
Opcode : 47Q
|
|
*/
|
|
/**********************************************************************/
|
|
|
|
#define SAVE_ERROR_EXIT2(topcstk, tos) \
|
|
{ \
|
|
Scratch_CSTK = topcstk; \
|
|
ERROR_EXIT(tos); \
|
|
}
|
|
|
|
#define S_N_CHECKANDCADR2(sour, dest, tos, tcstk) \
|
|
{ \
|
|
register LispPTR parm = sour; \
|
|
if (GetTypeNumber(parm) != TYPE_LISTP) { \
|
|
SAVE_ERROR_EXIT2(tcstk, tos); \
|
|
} else \
|
|
dest = cadr(parm); \
|
|
}
|
|
|
|
LispPTR N_OP_listget(register LispPTR plist, register LispPTR tos) {
|
|
REGISTER struct cadr_cell cadrobj;
|
|
|
|
while (plist != NIL_PTR) {
|
|
S_N_CHECKANDCADR2(plist, cadrobj, tos, plist);
|
|
|
|
if (cadrobj.car_cell == tos) {
|
|
if (cadrobj.cdr_cell == NIL_PTR) return NIL_PTR;
|
|
|
|
if (Listp(cadrobj.cdr_cell))
|
|
return (car(cadrobj.cdr_cell));
|
|
else /* must punt in case car/cdrerr */
|
|
SAVE_ERROR_EXIT2(plist, tos);
|
|
}
|
|
|
|
if (!Listp(cadrobj.cdr_cell)) { /* this list ended before we found prop */
|
|
return (NIL_PTR);
|
|
}
|
|
|
|
S_N_CHECKANDCADR2(cadrobj.cdr_cell, cadrobj, tos, plist);
|
|
plist = cadrobj.cdr_cell;
|
|
|
|
if (!Irq_Stk_End) {
|
|
/* for continuation, it becomes plist on next time */
|
|
Scratch_CSTK = plist;
|
|
TIMER_EXIT(tos);
|
|
}
|
|
}
|
|
|
|
return (NIL_PTR);
|
|
|
|
} /* N_OP_listget end */
|