vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | #include "asn1fix_internal.h" |
| 2 | |
| 3 | int |
| 4 | asn1f_fetch_tag(asn1p_t *asn, asn1p_module_t *mod, asn1p_expr_t *expr, struct asn1p_type_tag_s *tag) { |
| 5 | int ret; |
| 6 | |
| 7 | if(expr->tag.tag_class != TC_NOCLASS) { |
| 8 | *tag = expr->tag; |
| 9 | return 0; |
| 10 | } |
| 11 | |
| 12 | if(expr->expr_type == A1TC_EXTENSIBLE) { |
| 13 | memset(tag, 0, sizeof(*tag)); |
| 14 | tag->tag_class = -1; |
| 15 | return 0; |
| 16 | } |
| 17 | |
| 18 | if(expr->meta_type == AMT_TYPE) { |
| 19 | memset(tag, 0, sizeof(*tag)); |
| 20 | tag->tag_class = TC_UNIVERSAL; |
| 21 | tag->tag_value = expr_type2uclass_value[expr->expr_type]; |
| 22 | return (tag->tag_value == 0) ? -1 : 0; |
| 23 | } |
| 24 | |
| 25 | if(expr->meta_type == AMT_TYPEREF) { |
| 26 | arg_t arg; |
| 27 | |
| 28 | memset(&arg, 0, sizeof(arg)); |
| 29 | arg.asn = asn; |
| 30 | arg.mod = mod; |
| 31 | arg.expr = expr; |
| 32 | |
| 33 | expr = asn1f_lookup_symbol(&arg, expr->reference, &mod); |
| 34 | if(expr == NULL) return -1; |
| 35 | |
| 36 | if(expr->_mark & TM_RECURSION) |
| 37 | return -1; |
| 38 | |
| 39 | expr->_mark |= TM_RECURSION; |
| 40 | ret = asn1f_fetch_tag(asn, mod, expr, tag); |
| 41 | expr->_mark &= ~TM_RECURSION; |
| 42 | return ret; |
| 43 | } |
| 44 | |
| 45 | return -1; |
| 46 | } |
| 47 | |