vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | #include "asn1fix_internal.h" |
| 2 | |
| 3 | static int asn1f_check_same_children(arg_t *arg, asn1p_expr_t *a, asn1p_expr_t *b); |
| 4 | |
| 5 | /* |
| 6 | * Check that the expressions given are compatible in their type. |
| 7 | * ORDER DOES MATTER! (See .h). |
| 8 | */ |
| 9 | int |
| 10 | asn1f_check_type_compatibility(arg_t *arg, asn1p_expr_t *a, asn1p_expr_t *b) { |
| 11 | asn1p_expr_type_e atype, btype; |
| 12 | |
| 13 | atype = a->expr_type; |
| 14 | btype = b->expr_type; |
| 15 | |
| 16 | DEBUG("%s(%s:%x@%d, %s:%x@%d)", __func__, |
| 17 | a->Identifier, atype, a->_lineno, |
| 18 | b->Identifier, btype, b->_lineno); |
| 19 | |
| 20 | /* |
| 21 | * Expected terminal type! |
| 22 | */ |
| 23 | assert(atype != A1TC_REFERENCE); |
| 24 | assert(btype != A1TC_REFERENCE); |
| 25 | |
| 26 | if(atype != btype) { |
| 27 | /* |
| 28 | * Limited compatibility. |
| 29 | */ |
| 30 | if((atype == A1TC_UNIVERVAL && btype == ASN_BASIC_INTEGER) |
| 31 | || (atype == A1TC_UNIVERVAL && btype == ASN_BASIC_ENUMERATED) |
| 32 | ) |
| 33 | return 0; |
| 34 | DEBUG("\t%s and %s are not compatible", |
| 35 | a->Identifier, b->Identifier); |
| 36 | return -1; /* Fairly obviously */ |
| 37 | } |
| 38 | |
| 39 | if(a == b) |
| 40 | return 0; /* Fairly obviously */ |
| 41 | |
| 42 | switch(atype) { |
| 43 | case ASN_BASIC_INTEGER: |
| 44 | /* All integers are compatible */ |
| 45 | return 0; |
| 46 | case ASN_BASIC_ENUMERATED: |
| 47 | /* |
| 48 | * Enumerations are not compatible |
| 49 | * unless their definitions are the same. |
| 50 | */ |
| 51 | if(asn1f_check_same_children(arg, a, b)) { |
| 52 | DEBUG("\tEnumerations are different %s and %s", |
| 53 | a->Identifier, b->Identifier); |
| 54 | return -1; |
| 55 | } |
| 56 | return 0; |
| 57 | default: |
| 58 | /* Compatibility is not defined yet */ |
| 59 | DEBUG("\tCompatibility rule is not defined for %s and %s", |
| 60 | a->Identifier, b->Identifier); |
| 61 | return -1; |
| 62 | } |
| 63 | |
| 64 | return 0; |
| 65 | } |
| 66 | |
| 67 | /* |
| 68 | * Check that the children are exactly same. |
| 69 | */ |
| 70 | static int |
| 71 | asn1f_check_same_children(arg_t *arg, asn1p_expr_t *a, asn1p_expr_t *b) { |
| 72 | asn1p_expr_t *achild; |
| 73 | asn1p_expr_t *bchild; |
| 74 | |
| 75 | achild = TQ_FIRST(&(a->members)); |
| 76 | bchild = TQ_FIRST(&(b->members)); |
| 77 | |
| 78 | while(1) { |
| 79 | if(achild->expr_type != bchild->expr_type) |
| 80 | return -1; |
| 81 | |
| 82 | if(achild->Identifier && bchild->Identifier) { |
| 83 | if(strcmp(achild->Identifier, bchild->Identifier)) |
| 84 | return -1; |
| 85 | } else if(!(!achild->Identifier && !bchild->Identifier)) { |
| 86 | return -1; |
| 87 | } |
| 88 | |
| 89 | if(achild->value && bchild->value) { |
| 90 | if(achild->value->type != bchild->value->type) |
| 91 | return -1; |
| 92 | switch(achild->value->type) { |
| 93 | case ATV_INTEGER: |
| 94 | if(achild->value->value.v_integer |
| 95 | != bchild->value->value.v_integer) |
| 96 | return -1; |
| 97 | break; |
| 98 | case ATV_REFERENCED: |
| 99 | default: |
| 100 | DEBUG("Value %s at lines %d and " |
| 101 | "%d cannot be used in " |
| 102 | "semantical equality check", |
| 103 | asn1f_printable_value(achild->value), |
| 104 | achild->value->value.reference->_lineno, |
| 105 | bchild->value->value.reference->_lineno |
| 106 | ); |
| 107 | return -1; |
| 108 | } |
| 109 | } else if(!(!achild->value && !bchild->value)) { |
| 110 | /* One of values is defined, and another is not */ |
| 111 | return -1; |
| 112 | } |
| 113 | |
| 114 | achild = TQ_NEXT(achild, next); |
| 115 | bchild = TQ_NEXT(bchild, next); |
| 116 | |
| 117 | if(achild && bchild) |
| 118 | continue; |
| 119 | else if(!achild && !bchild) |
| 120 | break; |
| 121 | else |
| 122 | return -1; |
| 123 | } |
| 124 | |
| 125 | DEBUG("\t%s:%x@%d and %s:%x@%d are semantically equivalent", |
| 126 | a->Identifier, a->expr_type, a->_lineno, |
| 127 | b->Identifier, b->expr_type, b->_lineno); |
| 128 | |
| 129 | return 0; |
| 130 | } |
| 131 | |
| 132 | |