void
prim_trypop(PRIM_PROTOTYPE)
{
CHECKOP(0);
if (!(fr->trys.top))
abort_interp("Internal error; TRY stack underflow.");
fr->trys.top--;
fr->trys.st = pop_try(fr->trys.st);
}
struct inst *
interp_loop(dbref player, dbref program, struct frame *fr, int rettyp)
{
register struct inst *pc;
register int atop;
register struct inst *arg;
register struct inst *temp1;
register struct inst *temp2;
register struct stack_addr *sys;
register int instr_count;
register int stop;
int i = 0, tmp, writeonly, mlev;
static struct inst retval;
char dbuf[BUFFER_LEN];
int instno_debug_line = get_primitive("debug_line");
fr->level = ++interp_depth; /* increment interp level */
/* load everything into local stuff */
pc = fr->pc;
atop = fr->argument.top;
stop = fr->system.top;
arg = fr->argument.st;
sys = fr->system.st;
writeonly = fr->writeonly;
already_created = 0;
fr->brkpt.isread = 0;
if (!pc) {
struct line *tmpline;
tmpline = PROGRAM_FIRST(program);
PROGRAM_SET_FIRST(program, (struct line *) read_program(program));
do_compile(-1, OWNER(program), program, 0);
free_prog_text(PROGRAM_FIRST(program));
PROGRAM_SET_FIRST(program, tmpline);
pc = fr->pc = PROGRAM_START(program);
if (!pc) {
abort_loop_hard("Program not compilable. Cannot run.", NULL, NULL);
}
PROGRAM_INC_PROF_USES(program);
PROGRAM_INC_INSTANCES(program);
}
ts_useobject(program);
err = 0;
instr_count = 0;
mlev = ProgMLevel(program);
gettimeofday(&fr->proftime, NULL);
/* This is the 'natural' way to exit a function */
while (stop) {
/* Abort program if player/thing running it is recycled */
if ((player < 0) || (player >= db_top) || ((Typeof(player) != TYPE_PLAYER) && (Typeof(player) != TYPE_THING)))
{
reload(fr, atop, stop);
prog_clean(fr);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
fr->instcnt++;
instr_count++;
if ((fr->multitask == PREEMPT) || (FLAGS(program) & BUILDER)) {
if (mlev == 4) {
if (tp_max_ml4_preempt_count)
{
if (instr_count >= tp_max_ml4_preempt_count)
abort_loop_hard("Maximum preempt instruction count exceeded", NULL, NULL);
}
else
instr_count = 0;
} else {
/* else make sure that the program doesn't run too long */
if (instr_count >= tp_max_instr_count)
abort_loop_hard("Maximum preempt instruction count exceeded", NULL, NULL);
}
} else {
/* if in FOREGROUND or BACKGROUND mode, '0 sleep' every so often. */
if ((fr->instcnt > tp_instr_slice * 4) && (instr_count >= tp_instr_slice)) {
fr->pc = pc;
reload(fr, atop, stop);
PLAYER_SET_BLOCK(player, (!fr->been_background));
add_muf_delay_event(0, fr->descr, player, NOTHING, NOTHING, program, fr,
(fr->multitask ==
FOREGROUND) ? "FOREGROUND" : "BACKGROUND");
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
}
if (((FLAGS(program) & ZOMBIE) || fr->brkpt.force_debugging) &&
!fr->been_background &&
controls(player, program)
) {
fr->brkpt.debugging = 1;
} else {
fr->brkpt.debugging = 0;
}
if (FLAGS(program) & DARK ||
(fr->brkpt.debugging && fr->brkpt.showstack && !fr->brkpt.bypass)) {
if ((pc->type != PROG_PRIMITIVE) || (pc->data.number != instno_debug_line))
{
char *m = debug_inst(fr, 0, pc, fr->pid, arg, dbuf, sizeof(dbuf), atop, program);
notify_nolisten(player, m, 1);
}
}
if (fr->brkpt.debugging) {
short breakflag = 0;
if (stop == 1 &&
!fr->brkpt.bypass &&
pc->type == PROG_PRIMITIVE &&
pc->data.number == IN_RET
) {
/* Program is about to EXIT */
notify_nolisten(player, "Program is about to EXIT.", 1);
breakflag = 1;
} else if (fr->brkpt.count) {
for (i = 0; i < fr->brkpt.count; i++) {
if ((!fr->brkpt.pc[i] || pc == fr->brkpt.pc[i]) &&
/* pc matches */
(fr->brkpt.line[i] == -1 ||
(fr->brkpt.lastline != pc->line &&
fr->brkpt.line[i] == pc->line)) &&
/* line matches */
(fr->brkpt.level[i] == -1 ||
stop <= fr->brkpt.level[i]) &&
/* level matches */
(fr->brkpt.prog[i] == NOTHING ||
fr->brkpt.prog[i] == program) &&
/* program matches */
(fr->brkpt.linecount[i] == -2 ||
(fr->brkpt.lastline != pc->line &&
fr->brkpt.linecount[i]-- <= 0)) &&
/* line count matches */
(fr->brkpt.pccount[i] == -2 ||
(fr->brkpt.lastpc != pc &&
fr->brkpt.pccount[i]-- <= 0))
/* pc count matches */
) {
if (fr->brkpt.bypass) {
if (fr->brkpt.pccount[i] == -1)
fr->brkpt.pccount[i] = 0;
if (fr->brkpt.linecount[i] == -1)
fr->brkpt.linecount[i] = 0;
} else {
breakflag = 1;
break;
}
}
}
}
if (breakflag) {
char *m;
char buf[BUFFER_LEN];
if (fr->brkpt.dosyspop) {
program = sys[--stop].progref;
pc = sys[stop].offset;
}
add_muf_read_event(fr->descr, player, program, fr);
reload(fr, atop, stop);
fr->pc = pc;
fr->brkpt.isread = 0;
fr->brkpt.breaknum = i;
fr->brkpt.lastlisted = 0;
fr->brkpt.bypass = 0;
fr->brkpt.dosyspop = 0;
PLAYER_SET_CURR_PROG(player, program);
PLAYER_SET_BLOCK(player, 0);
interp_depth--;
if (!fr->brkpt.showstack) {
m = debug_inst(fr, 0, pc, fr->pid, arg, dbuf, sizeof(dbuf), atop, program);
notify_nolisten(player, m, 1);
}
if (pc <= PROGRAM_CODE(program) || (pc - 1)->line != pc->line) {
list_proglines(player, program, fr, pc->line, 0);
} else {
m = show_line_prims(fr, program, pc, 15, 1);
snprintf(buf, sizeof(buf), " %s", m);
notify_nolisten(player, buf, 1);
}
calc_profile_timing(program,fr);
return NULL;
}
fr->brkpt.lastline = pc->line;
fr->brkpt.lastpc = pc;
fr->brkpt.bypass = 0;
}
if (mlev < 3) {
if (fr->instcnt > (tp_max_instr_count * ((mlev == 2) ? 4 : 1)))
abort_loop_hard("Maximum total instruction count exceeded.", NULL, NULL);
}
switch (pc->type) {
case PROG_INTEGER:
case PROG_FLOAT:
case PROG_ADD:
case PROG_OBJECT:
case PROG_VAR:
case PROG_LVAR:
case PROG_SVAR:
case PROG_STRING:
case PROG_LOCK:
case PROG_MARK:
case PROG_ARRAY:
if (atop >= STACK_SIZE)
abort_loop("Stack overflow.", NULL, NULL);
copyinst(pc, arg + atop);
pc++;
atop++;
break;
case PROG_LVAR_AT:
case PROG_LVAR_AT_CLEAR:
{
struct inst *tmp;
struct localvars *lv;
if (atop >= STACK_SIZE)
abort_loop("Stack overflow.", NULL, NULL);
if (pc->data.number >= MAX_VAR || pc->data.number < 0)
abort_loop("Scoped variable number out of range.", NULL, NULL);
lv = localvars_get(fr, program);
tmp = &(lv->lvars[pc->data.number]);
copyinst(tmp, arg + atop);
if (pc->type == PROG_LVAR_AT_CLEAR) {
CLEAR(tmp);
tmp->type = PROG_INTEGER;
tmp->data.number = 0;
}
pc++;
atop++;
}
break;
case PROG_LVAR_BANG:
{
struct inst *the_var;
struct localvars *lv;
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
if (pc->data.number >= MAX_VAR || pc->data.number < 0)
abort_loop("Scoped variable number out of range.", NULL, NULL);
lv = localvars_get(fr, program);
the_var = &(lv->lvars[pc->data.number]);
CLEAR(the_var);
temp1 = arg + --atop;
*the_var = *temp1;
pc++;
}
break;
case PROG_SVAR_AT:
case PROG_SVAR_AT_CLEAR:
{
struct inst *tmp;
if (atop >= STACK_SIZE)
abort_loop("Stack overflow.", NULL, NULL);
tmp = scopedvar_get(fr, 0, pc->data.number);
if (!tmp)
abort_loop("Scoped variable number out of range.", NULL, NULL);
copyinst(tmp, arg + atop);
if (pc->type == PROG_SVAR_AT_CLEAR) {
CLEAR(tmp);
tmp->type = PROG_INTEGER;
tmp->data.number = 0;
}
pc++;
atop++;
}
break;
case PROG_SVAR_BANG:
{
struct inst *the_var;
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
the_var = scopedvar_get(fr, 0, pc->data.number);
if (!the_var)
abort_loop("Scoped variable number out of range.", NULL, NULL);
CLEAR(the_var);
temp1 = arg + --atop;
*the_var = *temp1;
pc++;
}
break;
case PROG_FUNCTION:
{
int i = pc->data.mufproc->args;
if (atop < i)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < i)
abort_loop("Stack protection fault.", NULL, NULL);
if (fr->skip_declare)
fr->skip_declare = 0;
else
scopedvar_addlevel(fr, pc, pc->data.mufproc->vars);
while (i-->0)
{
struct inst *tmp;
temp1 = arg + --atop;
tmp = scopedvar_get(fr, 0, i);
if (!tmp)
abort_loop_hard("Internal error: Scoped variable number out of range in FUNCTION init.", temp1, NULL);
CLEAR(tmp);
copyinst(temp1, tmp);
CLEAR(temp1);
}
pc++;
}
break;
case PROG_IF:
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (false_inst(temp1))
pc = pc->data.call;
else
pc++;
CLEAR(temp1);
break;
case PROG_EXEC:
if (stop >= STACK_SIZE)
abort_loop("System Stack Overflow", NULL, NULL);
sys[stop].progref = program;
sys[stop++].offset = pc + 1;
pc = pc->data.call;
fr->skip_declare = 0; /* Make sure we DON'T skip var decls */
break;
case PROG_JMP:
/* Don't need to worry about skipping scoped var decls here. */
/* JMP to a function header can only happen in IN_JMP */
pc = pc->data.call;
break;
case PROG_TRY:
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_INTEGER || temp1->data.number < 0)
abort_loop("Argument is not a positive integer.", temp1, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < temp1->data.number)
abort_loop("Stack protection fault.", NULL, NULL);
if (temp1->data.number > atop)
abort_loop("Stack Underflow.", temp1, NULL);
fr->trys.top++;
fr->trys.st = push_try(fr->trys.st);
fr->trys.st->depth = atop - temp1->data.number;
fr->trys.st->call_level = stop;
fr->trys.st->for_count = 0;
fr->trys.st->addr = pc->data.call;
pc++;
CLEAR(temp1);
break;
case PROG_PRIMITIVE:
/*
* All pc modifiers and stuff like that should stay here,
* everything else call with an independent dispatcher.
*/
switch (pc->data.number) {
case IN_JMP:
if (atop < 1)
abort_loop("Stack underflow. Missing address.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_ADD)
abort_loop("Argument is not an address.", temp1, NULL);
if (temp1->data.addr->progref >= db_top ||
temp1->data.addr->progref < 0 ||
(Typeof(temp1->data.addr->progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", temp1, NULL);
if (program != temp1->data.addr->progref) {
abort_loop("Destination outside current program.", temp1, NULL);
}
if (temp1->data.addr->data->type == PROG_FUNCTION) {
fr->skip_declare = 1;
}
pc = temp1->data.addr->data;
CLEAR(temp1);
break;
case IN_EXECUTE:
if (atop < 1)
abort_loop("Stack Underflow. Missing address.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_ADD)
abort_loop("Argument is not an address.", temp1, NULL);
if (temp1->data.addr->progref >= db_top ||
temp1->data.addr->progref < 0 ||
(Typeof(temp1->data.addr->progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", temp1, NULL);
if (stop >= STACK_SIZE)
abort_loop("System Stack Overflow", temp1, NULL);
sys[stop].progref = program;
sys[stop++].offset = pc + 1;
if (program != temp1->data.addr->progref) {
program = temp1->data.addr->progref;
fr->caller.st[++fr->caller.top] = program;
mlev = ProgMLevel(program);
PROGRAM_INC_INSTANCES(program);
}
pc = temp1->data.addr->data;
CLEAR(temp1);
break;
case IN_CALL:
if (atop < 1)
abort_loop("Stack Underflow. Missing dbref argument.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
temp2 = 0;
if (temp1->type != PROG_OBJECT) {
temp2 = temp1;
if (atop < 1)
abort_loop("Stack Underflow. Missing dbref of func.", temp1, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp2->type != PROG_STRING)
abort_loop("Public Func. name string required. (2)", temp1, temp2);
if (!temp2->data.string)
abort_loop("Null string not allowed. (2)", temp1, temp2);
}
if (temp1->type != PROG_OBJECT)
abort_loop("Dbref required. (1)", temp1, temp2);
if (!valid_object(temp1)
|| Typeof(temp1->data.objref) != TYPE_PROGRAM)
abort_loop("Invalid object.", temp1, temp2);
if (!(PROGRAM_CODE(temp1->data.objref))) {
struct line *tmpline;
tmpline = PROGRAM_FIRST(temp1->data.objref);
PROGRAM_SET_FIRST(temp1->data.objref,
(struct line *) read_program(temp1->data.objref));
do_compile(-1, OWNER(temp1->data.objref), temp1->data.objref, 0);
free_prog_text(PROGRAM_FIRST(temp1->data.objref));
PROGRAM_SET_FIRST(temp1->data.objref, tmpline);
if (!(PROGRAM_CODE(temp1->data.objref)))
abort_loop("Program not compilable.", temp1, temp2);
}
if (ProgMLevel(temp1->data.objref) == 0)
abort_loop("Permission denied", temp1, temp2);
if (mlev < 4 && OWNER(temp1->data.objref) != ProgUID
&& !Linkable(temp1->data.objref))
abort_loop("Permission denied", temp1, temp2);
if (stop >= STACK_SIZE)
abort_loop("System Stack Overflow", temp1, temp2);
sys[stop].progref = program;
sys[stop].offset = pc + 1;
if (!temp2) {
pc = PROGRAM_START(temp1->data.objref);
} else {
struct publics *pbs;
int tmpint;
pbs = PROGRAM_PUBS(temp1->data.objref);
while (pbs) {
tmpint = string_compare(temp2->data.string->data, pbs->subname);
if (!tmpint)
break;
pbs = pbs->next;
}
if (!pbs)
abort_loop("PUBLIC or WIZCALL function not found. (2)", temp2, temp2);
if (mlev < pbs->mlev)
abort_loop("Insufficient permissions to call WIZCALL function. (2)",
temp2, temp2);
pc = pbs->addr.ptr;
}
stop++;
if (temp1->data.objref != program) {
calc_profile_timing(program,fr);
gettimeofday(&fr->proftime, NULL);
program = temp1->data.objref;
fr->caller.st[++fr->caller.top] = program;
PROGRAM_INC_INSTANCES(program);
mlev = ProgMLevel(program);
}
PROGRAM_INC_PROF_USES(program);
ts_useobject(program);
CLEAR(temp1);
if (temp2)
CLEAR(temp2);
break;
case IN_RET:
if (stop > 1 && program != sys[stop - 1].progref) {
if (sys[stop - 1].progref >= db_top ||
sys[stop - 1].progref < 0 ||
(Typeof(sys[stop - 1].progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", NULL, NULL);
calc_profile_timing(program,fr);
gettimeofday(&fr->proftime, NULL);
PROGRAM_DEC_INSTANCES(program);
program = sys[stop - 1].progref;
mlev = ProgMLevel(program);
fr->caller.top--;
}
scopedvar_poplevel(fr);
pc = sys[--stop].offset;
break;
case IN_CATCH:
case IN_CATCH_DETAILED:
{
int depth;
if (!(fr->trys.top))
abort_loop_hard("Internal error. TRY stack underflow.", NULL, NULL);
depth = fr->trys.st->depth;
while (atop > depth) {
temp1 = arg + --atop;
CLEAR(temp1);
}
while (fr->trys.st->for_count-->0) {
CLEAR(&fr->fors.st->cur);
CLEAR(&fr->fors.st->end);
fr->fors.top--;
fr->fors.st = pop_for(fr->fors.st);
}
fr->trys.top--;
fr->trys.st = pop_try(fr->trys.st);
if (pc->data.number == IN_CATCH) {
/* IN_CATCH */
if (fr->errorstr) {
arg[atop].type = PROG_STRING;
arg[atop++].data.string = alloc_prog_string(fr->errorstr);
free(fr->errorstr);
fr->errorstr = NULL;
} else {
arg[atop].type = PROG_STRING;
arg[atop++].data.string = NULL;
}
if (fr->errorinst) {
free(fr->errorinst);
fr->errorinst = NULL;
}
} else {
/* IN_CATCH_DETAILED */
stk_array *nu = new_array_dictionary();
if (fr->errorstr) {
array_set_strkey_strval(&nu, "error", fr->errorstr);
free(fr->errorstr);
fr->errorstr = NULL;
}
if (fr->errorinst) {
array_set_strkey_strval(&nu, "instr", fr->errorinst);
free(fr->errorinst);
fr->errorinst = NULL;
}
array_set_strkey_intval(&nu, "line", fr->errorline);
array_set_strkey_refval(&nu, "program", fr->errorprog);
arg[atop].type = PROG_ARRAY;
arg[atop++].data.array = nu;
}
reload(fr, atop, stop);
}
pc++;
break;
case IN_EVENT_WAITFOR:
if (atop < 1)
abort_loop("Stack Underflow. Missing eventID list array argument.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_ARRAY)
abort_loop("EventID string list array expected.", temp1, NULL);
if (temp1->data.array && temp1->data.array->type != ARRAY_PACKED)
abort_loop("Argument must be a list array of eventid strings.", temp1, NULL);
if (!array_is_homogenous(temp1->data.array, PROG_STRING))
abort_loop("Argument must be a list array of eventid strings.", temp1, NULL);
fr->pc = pc + 1;
reload(fr, atop, stop);
{
int i, outcount;
int count = array_count(temp1->data.array);
char** events = (char**)malloc(count * sizeof(char**));
for (outcount = i = 0; i < count; i++) {
char *val = array_get_intkey_strval(temp1->data.array, i);
if (val != NULL) {
int found = 0;
int j;
for (j = 0; j < outcount; j++) {
if (!strcmp(events[j], val)) {
found = 1;
break;
}
}
if (!found) {
events[outcount++] = val;
}
}
}
muf_event_register_specific(player, program, fr, outcount, events);
free(events);
}
PLAYER_SET_BLOCK(player, (!fr->been_background));
CLEAR(temp1);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
/* NOTREACHED */
break;
case IN_READ:
if (writeonly)
abort_loop("Program is write-only.", NULL, NULL);
if (fr->multitask == BACKGROUND)
abort_loop("BACKGROUND programs are write only.", NULL, NULL);
reload(fr, atop, stop);
fr->brkpt.isread = 1;
fr->pc = pc + 1;
PLAYER_SET_CURR_PROG(player, program);
PLAYER_SET_BLOCK(player, 0);
add_muf_read_event(fr->descr, player, program, fr);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
/* NOTREACHED */
break;
case IN_SLEEP:
if (atop < 1)
abort_loop("Stack Underflow.", NULL, NULL);
if (fr->trys.top && atop - fr->trys.st->depth < 1)
abort_loop("Stack protection fault.", NULL, NULL);
temp1 = arg + --atop;
if (temp1->type != PROG_INTEGER)
abort_loop("Invalid argument type.", temp1, NULL);
fr->pc = pc + 1;
reload(fr, atop, stop);
if (temp1->data.number < 0)
abort_loop("Timetravel beyond scope of muf.", temp1, NULL);
add_muf_delay_event(temp1->data.number, fr->descr, player,
NOTHING, NOTHING, program, fr, "SLEEPING");
PLAYER_SET_BLOCK(player, (!fr->been_background));
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
/* NOTREACHED */
break;
default:
nargs = 0;
reload(fr, atop, stop);
tmp = atop;
prim_func[pc->data.number - 1] (player, program, mlev, pc, arg, &tmp, fr);
atop = tmp;
pc++;
break;
} /* switch */
break;
case PROG_CLEARED:
log_status("WARNING: attempt to execute instruction cleared by %s:%hd in program %d",
(char*)pc->data.addr, pc->line, program);
pc = NULL;
abort_loop_hard("Program internal error. Program erroneously freed from memory.",
NULL, NULL);
default:
pc = NULL;
abort_loop_hard("Program internal error. Unknown instruction type.",
NULL, NULL);
} /* switch */
if (err) {
if (err != ERROR_DIE_NOW && fr->trys.top) {
while (fr->trys.st->call_level < stop) {
if (stop > 1 && program != sys[stop - 1].progref) {
if (sys[stop - 1].progref >= db_top ||
sys[stop - 1].progref < 0 ||
(Typeof(sys[stop - 1].progref) != TYPE_PROGRAM))
abort_loop_hard("Internal error. Invalid address.", NULL, NULL);
calc_profile_timing(program,fr);
gettimeofday(&fr->proftime, NULL);
PROGRAM_DEC_INSTANCES(program);
program = sys[stop - 1].progref;
mlev = ProgMLevel(program);
fr->caller.top--;
}
scopedvar_poplevel(fr);
stop--;
}
pc = fr->trys.st->addr;
err = 0;
} else {
reload(fr, atop, stop);
prog_clean(fr);
PLAYER_SET_BLOCK(player, 0);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}
}
} /* while */
PLAYER_SET_BLOCK(player, 0);
if (atop) {
struct inst *rv;
if (rettyp) {
copyinst(arg + atop - 1, &retval);
rv = &retval;
} else {
if (!false_inst(arg + atop - 1)) {
rv = (struct inst *) 1;
} else {
rv = NULL;
}
}
reload(fr, atop, stop);
prog_clean(fr);
interp_depth--;
calc_profile_timing(program,fr);
return rv;
}
reload(fr, atop, stop);
prog_clean(fr);
interp_depth--;
calc_profile_timing(program,fr);
return NULL;
}