Initial revision
diff --git a/libasn1fix/asn1fix_enum.c b/libasn1fix/asn1fix_enum.c
new file mode 100644
index 0000000..8a90a43
--- /dev/null
+++ b/libasn1fix/asn1fix_enum.c
@@ -0,0 +1,136 @@
+#include "asn1fix_internal.h"
+
+/*
+ * Check the validity of an enumeration.
+ */
+int
+asn1f_fix_enum(arg_t *arg) {
+ asn1p_expr_t *expr = arg->expr;
+ asn1p_expr_t *ev;
+ asn1_integer_t max_value = -1;
+ int rvalue = 0;
+ asn1p_expr_t *ext_marker = NULL; /* "..." position */
+ int ret;
+
+ if(expr->expr_type != ASN_BASIC_ENUMERATED)
+ return 0; /* Just ignore it */
+
+ DEBUG("%s(%s)", __func__, expr->Identifier);
+
+ /*
+ * 1. Scan the enumeration values in search for inconsistencies.
+ */
+ TQ_FOR(ev, &(expr->members), next) {
+ asn1_integer_t eval;
+
+ if(ev->value)
+ DEBUG("\tItem %s(%s)", ev->Identifier,
+ asn1f_printable_value(ev->value));
+ else
+ DEBUG("\tItem %s", ev->Identifier);
+
+ /*
+ * 1.1 Found an extension mark "...", check correctness.
+ */
+ if(ev->expr_type == A1TC_EXTENSIBLE) {
+ if(ext_marker) {
+ arg->eh(1,
+ "Enumeration %s at line %d: "
+ "Second extension marker is not allowed",
+ expr->Identifier,
+ ev->_lineno);
+ rvalue = -1;
+ } else {
+ /*
+ * Remember the marker's position.
+ */
+ ext_marker = ev;
+ }
+ continue;
+ } else if(ev->Identifier == NULL
+ || ev->expr_type != A1TC_UNIVERVAL) {
+ FATAL(
+ "Enumeration %s at line %d: "
+ "Unsupported enumeration element %s",
+ expr->Identifier,
+ ev->_lineno,
+ ev->Identifier?ev->Identifier:"<anonymous>");
+ rvalue = -1;
+ continue;
+ }
+
+ /*
+ * 1.2 Compute the value of the enumeration element.
+ */
+ if(ev->value) {
+ switch(ev->value->type) {
+ case ATV_INTEGER:
+ eval = ev->value->value.v_integer;
+ break;
+ case ATV_REFERENCED:
+ FATAL("HERE HERE HERE", 1);
+ rvalue = -1;
+ continue;
+ break;
+ default:
+ FATAL("ENUMERATED type %s at line %d "
+ "contain element %s(%s) at line %d",
+ expr->Identifier, expr->_lineno,
+ ev->Identifier,
+ asn1f_printable_value(ev->value),
+ ev->_lineno);
+ rvalue = -1;
+ continue;
+ }
+ } else {
+ eval = max_value + 1;
+ ev->value = asn1p_value_fromint(eval);
+ if(ev->value == NULL) {
+ rvalue = -1;
+ continue;
+ }
+ }
+
+ /*
+ * 1.3 Check the applicability of this value.
+ */
+ if(eval <= max_value) {
+ if(ext_marker) {
+ /*
+ * Enumeration is allowed to be unordered
+ * before the first marker.
+ */
+ FATAL(
+ "Enumeration %s at line %d: "
+ "Explicit value \"%s(%lld)\" "
+ "is not greater "
+ "than previous values (max %lld)",
+ expr->Identifier,
+ ev->_lineno,
+ ev->Identifier,
+ eval,
+ max_value);
+ rvalue = -1;
+ }
+ } else if(eval > max_value) {
+ max_value = eval;
+ }
+
+ /*
+ * 1.4 Check that all identifiers before the current one
+ * differs from it.
+ */
+ ret = asn1f_check_unique_expr_child(arg, ev, NULL);
+ RET2RVAL(ret, rvalue);
+ }
+
+
+ /*
+ * 2. Reorder the first half (before optional "...") of the
+ * identifiers alphabetically.
+ */
+ // TODO
+
+ return rvalue;
+}
+