+/* Calculate LOWER or UPPER of TYPE.
+ Returns the result as an integer.
+ *RESULT_TYPE is the appropriate type for the result. */
+
+LONGEST
+type_lower_upper (enum exp_opcode op, /* Either UNOP_LOWER or UNOP_UPPER */
+ struct type *type, struct type **result_type)
+{
+ LONGEST low, high;
+ *result_type = type;
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_STRUCT:
+ *result_type = builtin_type_int;
+ if (chill_varying_type (type))
+ return type_lower_upper (op, TYPE_FIELD_TYPE (type, 1), result_type);
+ break;
+ case TYPE_CODE_ARRAY:
+ case TYPE_CODE_BITSTRING:
+ case TYPE_CODE_STRING:
+ type = TYPE_FIELD_TYPE (type, 0); /* Get index type */
+
+ /* ... fall through ... */
+ case TYPE_CODE_RANGE:
+ *result_type = TYPE_TARGET_TYPE (type);
+ return op == UNOP_LOWER ? TYPE_LOW_BOUND (type) : TYPE_HIGH_BOUND (type);
+
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_INT:
+ case TYPE_CODE_CHAR:
+ if (get_discrete_bounds (type, &low, &high) >= 0)
+ {
+ *result_type = type;
+ return op == UNOP_LOWER ? low : high;
+ }
+ break;
+ case TYPE_CODE_UNDEF:
+ case TYPE_CODE_PTR:
+ case TYPE_CODE_UNION:
+ case TYPE_CODE_FUNC:
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_VOID:
+ case TYPE_CODE_SET:
+ case TYPE_CODE_ERROR:
+ case TYPE_CODE_MEMBER:
+ case TYPE_CODE_METHOD:
+ case TYPE_CODE_REF:
+ case TYPE_CODE_COMPLEX:
+ default:
+ break;
+ }
+ error ("unknown mode for LOWER/UPPER builtin");
+}
+
+static value_ptr
+value_chill_length (value_ptr val)
+{
+ LONGEST tmp;
+ struct type *type = VALUE_TYPE (val);
+ struct type *ttype;
+ CHECK_TYPEDEF (type);
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_ARRAY:
+ case TYPE_CODE_BITSTRING:
+ case TYPE_CODE_STRING:
+ tmp = type_lower_upper (UNOP_UPPER, type, &ttype)
+ - type_lower_upper (UNOP_LOWER, type, &ttype) + 1;
+ break;
+ case TYPE_CODE_STRUCT:
+ if (chill_varying_type (type))
+ {
+ tmp = unpack_long (TYPE_FIELD_TYPE (type, 0), VALUE_CONTENTS (val));
+ break;
+ }
+ /* ... else fall through ... */
+ default:
+ error ("bad argument to LENGTH builtin");
+ }
+ return value_from_longest (builtin_type_int, tmp);
+}
+
+static value_ptr
+value_chill_card (value_ptr val)
+{
+ LONGEST tmp = 0;
+ struct type *type = VALUE_TYPE (val);
+ CHECK_TYPEDEF (type);
+
+ if (TYPE_CODE (type) == TYPE_CODE_SET)
+ {
+ struct type *range_type = TYPE_INDEX_TYPE (type);
+ LONGEST lower_bound, upper_bound;
+ int i;
+
+ get_discrete_bounds (range_type, &lower_bound, &upper_bound);
+ for (i = lower_bound; i <= upper_bound; i++)
+ if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
+ tmp++;
+ }
+ else
+ error ("bad argument to CARD builtin");
+
+ return value_from_longest (builtin_type_int, tmp);
+}
+
+static value_ptr
+value_chill_max_min (enum exp_opcode op, value_ptr val)
+{
+ LONGEST tmp = 0;
+ struct type *type = VALUE_TYPE (val);
+ struct type *elttype;
+ CHECK_TYPEDEF (type);
+
+ if (TYPE_CODE (type) == TYPE_CODE_SET)
+ {
+ LONGEST lower_bound, upper_bound;
+ int i, empty = 1;
+
+ elttype = TYPE_INDEX_TYPE (type);
+ CHECK_TYPEDEF (elttype);
+ get_discrete_bounds (elttype, &lower_bound, &upper_bound);
+
+ if (op == UNOP_CHMAX)
+ {
+ for (i = upper_bound; i >= lower_bound; i--)
+ {
+ if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
+ {
+ tmp = i;
+ empty = 0;
+ break;
+ }
+ }
+ }
+ else
+ {
+ for (i = lower_bound; i <= upper_bound; i++)
+ {
+ if (value_bit_index (type, VALUE_CONTENTS (val), i) > 0)
+ {
+ tmp = i;
+ empty = 0;
+ break;
+ }
+ }
+ }
+ if (empty)
+ error ("%s for empty powerset", op == UNOP_CHMAX ? "MAX" : "MIN");
+ }
+ else
+ error ("bad argument to %s builtin", op == UNOP_CHMAX ? "MAX" : "MIN");
+
+ return value_from_longest (TYPE_CODE (elttype) == TYPE_CODE_RANGE
+ ? TYPE_TARGET_TYPE (elttype)
+ : elttype,
+ tmp);
+}
+
+static value_ptr
+evaluate_subexp_chill (struct type *expect_type,
+ register struct expression *exp, register int *pos,
+ enum noside noside)
+{
+ int pc = *pos;
+ struct type *type;
+ int tem, nargs;
+ value_ptr arg1;
+ value_ptr *argvec;
+ enum exp_opcode op = exp->elts[*pos].opcode;
+ switch (op)
+ {
+ case MULTI_SUBSCRIPT:
+ if (noside == EVAL_SKIP)
+ break;
+ (*pos) += 3;
+ nargs = longest_to_int (exp->elts[pc + 1].longconst);
+ arg1 = evaluate_subexp_with_coercion (exp, pos, noside);
+ type = check_typedef (VALUE_TYPE (arg1));
+
+ if (nargs == 1 && TYPE_CODE (type) == TYPE_CODE_INT)
+ {
+ /* Looks like string repetition. */
+ value_ptr string = evaluate_subexp_with_coercion (exp, pos, noside);
+ return value_concat (arg1, string);
+ }
+
+ switch (TYPE_CODE (type))
+ {
+ case TYPE_CODE_PTR:
+ type = check_typedef (TYPE_TARGET_TYPE (type));
+ if (!type || TYPE_CODE (type) != TYPE_CODE_FUNC)
+ error ("reference value used as function");
+ /* ... fall through ... */
+ case TYPE_CODE_FUNC:
+ /* It's a function call. */
+ if (noside == EVAL_AVOID_SIDE_EFFECTS)
+ break;
+
+ /* Allocate arg vector, including space for the function to be
+ called in argvec[0] and a terminating NULL */
+ argvec = (value_ptr *) alloca (sizeof (value_ptr) * (nargs + 2));
+ argvec[0] = arg1;
+ tem = 1;
+ for (; tem <= nargs && tem <= TYPE_NFIELDS (type); tem++)
+ {
+ argvec[tem]
+ = evaluate_subexp_chill (TYPE_FIELD_TYPE (type, tem - 1),
+ exp, pos, noside);
+ }
+ for (; tem <= nargs; tem++)
+ argvec[tem] = evaluate_subexp_with_coercion (exp, pos, noside);
+ argvec[tem] = 0; /* signal end of arglist */
+
+ return call_function_by_hand (argvec[0], nargs, argvec + 1);
+ default:
+ break;
+ }
+
+ while (nargs-- > 0)
+ {
+ value_ptr index = evaluate_subexp_with_coercion (exp, pos, noside);
+ arg1 = value_subscript (arg1, index);
+ }
+ return (arg1);
+
+ case UNOP_LOWER:
+ case UNOP_UPPER:
+ (*pos)++;
+ if (noside == EVAL_SKIP)
+ {
+ (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, EVAL_SKIP);
+ goto nosideret;
+ }
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos,
+ EVAL_AVOID_SIDE_EFFECTS);
+ tem = type_lower_upper (op, VALUE_TYPE (arg1), &type);
+ return value_from_longest (type, tem);
+
+ case UNOP_LENGTH:
+ (*pos)++;
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
+ return value_chill_length (arg1);
+
+ case UNOP_CARD:
+ (*pos)++;
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
+ return value_chill_card (arg1);
+
+ case UNOP_CHMAX:
+ case UNOP_CHMIN:
+ (*pos)++;
+ arg1 = (*exp->language_defn->evaluate_exp) (NULL_TYPE, exp, pos, noside);
+ return value_chill_max_min (op, arg1);
+
+ case BINOP_COMMA:
+ error ("',' operator used in invalid context");
+
+ default:
+ break;
+ }
+
+ return evaluate_subexp_standard (expect_type, exp, pos, noside);
+nosideret:
+ return value_from_longest (builtin_type_long, (LONGEST) 1);
+}
+
+const struct language_defn chill_language_defn =
+{