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int
do_grep(arg,TARG,gimme,arglast)
register ARG *arg;
STR *TARG;
int gimme;
int *arglast;
{
STR **st = stack->ary_array;
register int dst = arglast[1];
register int src = dst + 1;
register int sp = arglast[2];
register int i = sp - arglast[1];
int oldsave = savestack->ary_fill;
SPAT *oldspat = curspat;
int oldtmps_base = tmps_base;
savesptr(&stab_val(defstab));
tmps_base = tmps_max;
if ((arg[1].arg_type & A_MASK) != A_EXPR) {
arg[1].arg_type &= A_MASK;
dehoist(arg,1);
arg[1].arg_type |= A_DONT;
}
arg = arg[1].arg_ptr.arg_arg;
while (i-- > 0) {
if (st[src]) {
st[src]->str_pok &= ~SP_TEMP;
stab_val(defstab) = st[src];
}
else
stab_val(defstab) = str_mortal(&str_undef);
(void)eval(arg,G_SCALAR,sp);
st = stack->ary_array;
if (str_true(st[sp+1]))
st[dst++] = st[src];
src++;
curspat = oldspat;
}
restorelist(oldsave);
tmps_base = oldtmps_base;
if (gimme != G_ARRAY) {
str_numset(TARG,(double)(dst - arglast[1]));
STABSET(TARG);
st[arglast[0]+1] = TARG;
return arglast[0]+1;
}
return arglast[0] + (dst - arglast[1]);
}
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