CAMLprim value caml_string_set(value str, value index, value newval)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= caml_string_length(str)) caml_array_bound_error();
Byte_u(str, idx) = Int_val(newval);
return Val_unit;
}
CAMLprim value caml_array_set_addr(value array, value index, value newval)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= Wosize_val(array)) caml_array_bound_error();
Modify(&Field(array, idx), newval);
return Val_unit;
}
CAMLprim value caml_array_set_float(value array, value index, value newval)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= Wosize_val(array) / Double_wosize)
caml_array_bound_error();
Store_double_field(array, idx, Double_val(newval));
return Val_unit;
}
CAMLprim value caml_array_get_addr(value array, value index)
{
CAMLparam2(array, index);
CAMLlocal1(x);
intnat idx = Long_val(index);
if (idx < 0 || idx >= Wosize_val(array)) caml_array_bound_error();
caml_read_field(array, idx, &x);
CAMLreturn (x);
}
/* Writes to a page from an OCaml string */
CAMLprim value
caml_page_write(value v_src, value v_srcoff, value v_dst, value v_dstoff, value v_len)
{
CAMLparam5(v_src, v_srcoff, v_dst, v_dstoff, v_len);
char *page = (char *)v_dst;
if (Int_val(v_dstoff) + Int_val(v_len) >= PAGE_SIZE || caml_string_length(v_src) + Int_val(v_srcoff) < Int_val(v_len))
caml_array_bound_error();
memcpy(page + Int_val(v_srcoff), String_val(v_src) + Int_val(v_srcoff), Int_val(v_len));
CAMLreturn(Val_unit);
}
CAMLprim value caml_array_get_float(value array, value index)
{
intnat idx = Long_val(index);
double d;
value res;
if (idx < 0 || idx >= Wosize_val(array) / Double_wosize)
caml_array_bound_error();
d = Double_field(array, idx);
Alloc_small(res, Double_wosize, Double_tag, { caml_handle_gc_interrupt(); });
static long caml_ba_offset(struct caml_ba_array * b, intnat * index)
{
intnat offset;
int i;
offset = 0;
if ((b->flags & CAML_BA_LAYOUT_MASK) == CAML_BA_C_LAYOUT) {
/* C-style layout: row major, indices start at 0 */
for (i = 0; i < b->num_dims; i++) {
if ((uintnat) index[i] >= (uintnat) b->dim[i])
caml_array_bound_error();
offset = offset * b->dim[i] + index[i];
}
} else {
/* Fortran-style layout: column major, indices start at 1 */
for (i = b->num_dims - 1; i >= 0; i--) {
if ((uintnat) (index[i] - 1) >= (uintnat) b->dim[i])
caml_array_bound_error();
offset = offset * b->dim[i] + (index[i] - 1);
}
}
return offset;
}
CAMLprim value caml_array_get_float(value array, value index)
{
intnat idx = Long_val(index);
double d;
value res;
if (idx < 0 || idx >= Wosize_val(array) / Double_wosize)
caml_array_bound_error();
d = Double_field(array, idx);
#define Setup_for_gc
#define Restore_after_gc
Alloc_small(res, Double_wosize, Double_tag);
#undef Setup_for_gc
#undef Restore_after_gc
Store_double_val(res, d);
return res;
}
CAMLprim value caml_array_get_addr(value array, value index)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= Wosize_val(array)) caml_array_bound_error();
return Field(array, idx);
}
CAMLprim value caml_string_get(value str, value index)
{
intnat idx = Long_val(index);
if (idx < 0 || idx >= caml_string_length(str)) caml_array_bound_error();
return Val_int(Byte_u(str, idx));
}
