| #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 flags) { |
| 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]; |
| if(flags && expr->expr_type == ASN_TYPE_ANY) { |
| assert(tag->tag_value == 0); |
| tag->tag_value = -1; |
| return 0; |
| } |
| 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->module, expr->reference); |
| if(expr == NULL) return -1; |
| |
| if(expr->_mark & TM_RECURSION) |
| return -1; |
| |
| expr->_mark |= TM_RECURSION; |
| ret = asn1f_fetch_tag(asn, expr->module, expr, tag, |
| flags); |
| expr->_mark &= ~TM_RECURSION; |
| return ret; |
| } |
| |
| return -1; |
| } |
| |