ex_index()
{
struct item *p, *q;
int i, j, f, n, lv;
n = *pcp++;
f = *pcp;
p = sp[-1];
if(f == ASGN) {
pcp++;
if(p->type != LV) error("indexed assign value");
if(((struct nlist *)p)->use != DA) fetch1(); /* error("used before set"); */
q = ((struct nlist *)p)->itemp;
}
else q = fetch1();
if(q->rank != n) error("subscript C");
idx.rank = 0;
for(i=0; i<n; i++) {
p = sp[-i-2];
if(p->type == EL) {
idx.dim[idx.rank++] = q->dim[i];
continue;
}
p = fetch(p);
sp[-i-2] = p;
for(j=0; j<p->rank; j++) idx.dim[idx.rank++] = p->dim[j];
}
size();
if(f == ASGN) {
p = fetch(sp[-n-2]);
sp[-n-2] = p;
if (p->size > 1) {
if(idx.size != p->size) error("assign C");
f = 1; /* v[i] <- v */
}
else {
if (idx.size && !p->size) error("assign C");
/* Note -- for idx.size = 0, no assign occurs
* anyway, so it is safe to set "datum" to 0
*/
datum = p->size ? getdat(p) : 0;
f = 2; /* v[i] <- s */
}
ex_elid();
}
else {
p = newdat(q->type, idx.rank, idx.size);
copy(IN, idx.dim, p->dim, idx.rank);
*sp++ = p;
f = 0; /* v[i] */
}
bidx(q);
index1(0, f);
if(f == 0) {
p = sp[-1];
sp--;
for(i=0; i<=n; i++) pop();
*sp++ = p;
}
else {
pop(); /* pop ELID */
sp--; /* skip over LV */
for(i=0; i<n; i++) pop();
}
}
void ex_index()
{
struct item *p, *q;
int i, j, f, n;
n = *gsip->ptr++;
f = *gsip->ptr;
p = sp[-1];
if (f == ASGN) {
gsip->ptr++;
if (p->itemType != LV)
error(ERR_value, "not a local variable");
if (((SymTabEntry*)p)->entryUse != DA)
fetch1();
q = ((SymTabEntry*)p)->itemp;
}
else
q = fetch1();
if (q->rank != n)
error(ERR_index, "");
idx.rank = 0;
for (i = 0; i < n; i++) {
p = sp[-i - 2];
if (p->itemType == EL) {
idx.dim[idx.rank++] = q->dim[i];
continue;
}
p = fetch(p);
sp[-i - 2] = p;
for (j = 0; j < p->rank; j++)
idx.dim[idx.rank++] = p->dim[j];
}
size();
if (f == ASGN) {
p = fetch(sp[-n - 2]);
sp[-n - 2] = p;
if (p->size > 1) {
if (idx.size != p->size)
error(ERR_length, "");
f = 1; /* v[i] <- v */
} else {
if (idx.size && !p->size)
error(ERR_length, "");
/* Note -- for idx.size = 0, no assign occurs
* anyway, so it is safe to set "datum" to 0
*/
datum = p->size ? getdat(p) : 0;
f = 2; /* v[i] <- s */
}
ex_elid();
} else {
p = newdat(q->itemType, idx.rank, idx.size);
copy(IN, (char*)idx.dim, (char*)p->dim, idx.rank);
*sp++ = p;
f = 0; /* v[i] */
}
bidx(q);
index1(0, f);
if (f == 0) {
p = sp[-1];
sp--;
for (i = 0; i <= n; i++)
pop();
*sp++ = p;
}
else {
pop(); /* pop ELID */
sp--; /* skip over LV */
for (i = 0; i < n; i++)
pop();
}
}