+struct value *
+evaluate_subexp_c (struct type *expect_type, struct expression *exp,
+ int *pos, enum noside noside)
+{
+ enum exp_opcode op = exp->elts[*pos].opcode;
+
+ switch (op)
+ {
+ case OP_STRING:
+ {
+ int oplen, limit;
+ struct type *type;
+ struct obstack output;
+ struct cleanup *cleanup;
+ struct value *result;
+ enum c_string_type dest_type;
+ const char *dest_charset;
+ int satisfy_expected = 0;
+
+ obstack_init (&output);
+ cleanup = make_cleanup_obstack_free (&output);
+
+ ++*pos;
+ oplen = longest_to_int (exp->elts[*pos].longconst);
+
+ ++*pos;
+ limit = *pos + BYTES_TO_EXP_ELEM (oplen + 1);
+ dest_type
+ = (enum c_string_type) longest_to_int (exp->elts[*pos].longconst);
+ switch (dest_type & ~C_CHAR)
+ {
+ case C_STRING:
+ type = language_string_char_type (exp->language_defn,
+ exp->gdbarch);
+ break;
+ case C_WIDE_STRING:
+ type = lookup_typename (exp->language_defn, exp->gdbarch,
+ "wchar_t", NULL, 0);
+ break;
+ case C_STRING_16:
+ type = lookup_typename (exp->language_defn, exp->gdbarch,
+ "char16_t", NULL, 0);
+ break;
+ case C_STRING_32:
+ type = lookup_typename (exp->language_defn, exp->gdbarch,
+ "char32_t", NULL, 0);
+ break;
+ default:
+ internal_error (__FILE__, __LINE__, _("unhandled c_string_type"));
+ }
+
+ /* Ensure TYPE_LENGTH is valid for TYPE. */
+ check_typedef (type);
+
+ /* If the caller expects an array of some integral type,
+ satisfy them. If something odder is expected, rely on the
+ caller to cast. */
+ if (expect_type && TYPE_CODE (expect_type) == TYPE_CODE_ARRAY)
+ {
+ struct type *element_type
+ = check_typedef (TYPE_TARGET_TYPE (expect_type));
+
+ if (TYPE_CODE (element_type) == TYPE_CODE_INT
+ || TYPE_CODE (element_type) == TYPE_CODE_CHAR)
+ {
+ type = element_type;
+ satisfy_expected = 1;
+ }
+ }
+
+ dest_charset = charset_for_string_type (dest_type, exp->gdbarch);
+
+ ++*pos;
+ while (*pos < limit)
+ {
+ int len;
+
+ len = longest_to_int (exp->elts[*pos].longconst);
+
+ ++*pos;
+ if (noside != EVAL_SKIP)
+ parse_one_string (&output, &exp->elts[*pos].string, len,
+ dest_charset, type);
+ *pos += BYTES_TO_EXP_ELEM (len);
+ }
+
+ /* Skip the trailing length and opcode. */
+ *pos += 2;
+
+ if (noside == EVAL_SKIP)
+ {
+ /* Return a dummy value of the appropriate type. */
+ if (expect_type != NULL)
+ result = allocate_value (expect_type);
+ else if ((dest_type & C_CHAR) != 0)
+ result = allocate_value (type);
+ else
+ result = value_cstring ("", 0, type);
+ do_cleanups (cleanup);
+ return result;
+ }
+
+ if ((dest_type & C_CHAR) != 0)
+ {
+ LONGEST value;
+
+ if (obstack_object_size (&output) != TYPE_LENGTH (type))
+ error (_("Could not convert character "
+ "constant to target character set"));
+ value = unpack_long (type, obstack_base (&output));
+ result = value_from_longest (type, value);
+ }
+ else
+ {
+ int i;
+
+ /* Write the terminating character. */
+ for (i = 0; i < TYPE_LENGTH (type); ++i)
+ obstack_1grow (&output, 0);
+
+ if (satisfy_expected)
+ {
+ LONGEST low_bound, high_bound;
+ int element_size = TYPE_LENGTH (type);
+
+ if (get_discrete_bounds (TYPE_INDEX_TYPE (expect_type),
+ &low_bound, &high_bound) < 0)
+ {
+ low_bound = 0;
+ high_bound = (TYPE_LENGTH (expect_type) / element_size) - 1;
+ }
+ if (obstack_object_size (&output) / element_size
+ > (high_bound - low_bound + 1))
+ error (_("Too many array elements"));
+
+ result = allocate_value (expect_type);
+ memcpy (value_contents_raw (result), obstack_base (&output),
+ obstack_object_size (&output));
+ }
+ else
+ result = value_cstring (obstack_base (&output),
+ obstack_object_size (&output),
+ type);
+ }
+ do_cleanups (cleanup);
+ return result;
+ }
+ break;
+
+ default:
+ break;
+ }
+ return evaluate_subexp_standard (expect_type, exp, pos, noside);
projects / deliverable / binutils-gdb.git / blobdiff