+#ifdef TARGET_OVERRIDES_FORMAT_ATTRIBUTES
+extern const target_ovr_attr TARGET_OVERRIDES_FORMAT_ATTRIBUTES[];
+#endif
+
+/* Attributes such as "printf" are equivalent to those such as
+ "gnu_printf" unless this is overridden by a target. */
+static const target_ovr_attr gnu_target_overrides_format_attributes[] =
+{
+ { "gnu_printf", "printf" },
+ { "gnu_scanf", "scanf" },
+ { "gnu_strftime", "strftime" },
+ { "gnu_strfmon", "strfmon" },
+ { NULL, NULL }
+};
+
+/* Translate to unified attribute name. This is used in decode_format_type and
+ decode_format_attr. In attr_name the user specified argument is passed. It
+ returns the unified format name from TARGET_OVERRIDES_FORMAT_ATTRIBUTES
+ or the attr_name passed to this function, if there is no matching entry. */
+static const char *
+convert_format_name_to_system_name (const char *attr_name)
+{
+ int i;
+
+ if (attr_name == NULL || *attr_name == 0
+ || strncmp (attr_name, "gcc_", 4) == 0)
+ return attr_name;
+
+#ifdef TARGET_OVERRIDES_FORMAT_ATTRIBUTES
+ /* Check if format attribute is overridden by target. */
+ if (TARGET_OVERRIDES_FORMAT_ATTRIBUTES != NULL
+ && TARGET_OVERRIDES_FORMAT_ATTRIBUTES_COUNT > 0)
+ {
+ for (i = 0; i < TARGET_OVERRIDES_FORMAT_ATTRIBUTES_COUNT; ++i)
+ {
+ if (cmp_attribs (TARGET_OVERRIDES_FORMAT_ATTRIBUTES[i].named_attr_src,
+ attr_name))
+ return attr_name;
+ if (cmp_attribs (TARGET_OVERRIDES_FORMAT_ATTRIBUTES[i].named_attr_dst,
+ attr_name))
+ return TARGET_OVERRIDES_FORMAT_ATTRIBUTES[i].named_attr_src;
+ }
+ }
+#endif
+ /* Otherwise default to gnu format. */
+ for (i = 0;
+ gnu_target_overrides_format_attributes[i].named_attr_src != NULL;
+ ++i)
+ {
+ if (cmp_attribs (gnu_target_overrides_format_attributes[i].named_attr_src,
+ attr_name))
+ return attr_name;
+ if (cmp_attribs (gnu_target_overrides_format_attributes[i].named_attr_dst,
+ attr_name))
+ return gnu_target_overrides_format_attributes[i].named_attr_src;
+ }
+
+ return attr_name;
+}
+
+/* Return true if TATTR_NAME and ATTR_NAME are the same format attribute,
+ counting "name" and "__name__" as the same, false otherwise. */
+static bool
+cmp_attribs (const char *tattr_name, const char *attr_name)
+{
+ int alen = strlen (attr_name);
+ int slen = (tattr_name ? strlen (tattr_name) : 0);
+ if (alen > 4 && attr_name[0] == '_' && attr_name[1] == '_'
+ && attr_name[alen - 1] == '_' && attr_name[alen - 2] == '_')
+ {
+ attr_name += 2;
+ alen -= 4;
+ }
+ if (alen != slen || strncmp (tattr_name, attr_name, alen) != 0)
+ return false;
+ return true;
+}
+
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