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#include "asn1fix_internal.h"
int
asn1f_fetch_tag(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, struct asn1p_type_tag_s *tag) {
int ret;
if(expr->tag.tag_class != TC_NOCLASS) {
*tag = expr->tag;
return 0;
}
if(expr->expr_type == A1TC_EXTENSIBLE) {
memset(tag, 0, sizeof(*tag));
tag->tag_class = -1;
return 0;
}
if(expr->meta_type == AMT_TYPE) {
memset(tag, 0, sizeof(*tag));
tag->tag_class = TC_UNIVERSAL;
tag->tag_value = expr_type2uclass_value[expr->expr_type];
return (tag->tag_value == 0) ? -1 : 0;
}
if(expr->meta_type == AMT_TYPEREF) {
arg_t arg;
memset(&arg, 0, sizeof(arg));
arg.asn = asn;
arg.mod = mod;
arg.expr = expr;
expr = asn1f_lookup_symbol(&arg, expr->reference, &mod);
if(expr == NULL) return -1;
if(expr->_mark & TM_RECURSION)
return -1;
expr->_mark |= TM_RECURSION;
ret = asn1f_fetch_tag(asn, mod, expr, tag);
expr->_mark &= ~TM_RECURSION;
return ret;
}
return -1;
}
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