vlm | fa67ddc | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | #include "asn1fix_internal.h" |
| 2 | |
| 3 | static int asn1f_parametrize(arg_t *arg, asn1p_expr_t *ex, asn1p_expr_t *ptype); |
| 4 | static int asn1f_param_process_recursive(arg_t *arg, asn1p_expr_t *expr, asn1p_expr_t *ptype, asn1p_expr_t *actargs); |
| 5 | static asn1p_expr_t *_referenced_argument(asn1p_ref_t *ref, asn1p_expr_t *ptype, asn1p_expr_t *actargs); |
| 6 | |
| 7 | int |
| 8 | asn1f_fix_parametrized_assignment(arg_t *arg) { |
| 9 | asn1p_expr_t *expr = arg->expr; |
| 10 | asn1p_expr_t *ptype; |
| 11 | |
| 12 | assert(expr->expr_type == A1TC_PARAMETRIZED); |
| 13 | assert(expr->reference); |
| 14 | |
| 15 | DEBUG("%s(\"%s\" ::= \"%s\" { %s }) for line %d", |
| 16 | __func__, expr->Identifier, |
| 17 | asn1f_printable_reference(expr->reference), |
| 18 | asn1f_printable_value(expr->value), |
| 19 | expr->_lineno); |
| 20 | |
| 21 | /* |
| 22 | * Find the corresponding parametrized type definition. |
| 23 | */ |
| 24 | DEBUG("Looking for parametrized type definition \"%s\"", |
| 25 | asn1f_printable_reference(expr->reference)); |
| 26 | ptype = asn1f_lookup_symbol(arg, expr->reference, 0); |
| 27 | if(ptype == NULL) { |
| 28 | DEBUG("%s: missing parametrized type declaration", |
| 29 | asn1f_printable_reference(expr->reference)); |
| 30 | return -1; |
| 31 | } |
| 32 | |
| 33 | /* |
| 34 | * Check that the number of arguments which are expected by |
| 35 | * the parametrized type declaration is consistent with the |
| 36 | * number of arguments supplied by the parametrized assignment. |
| 37 | */ |
| 38 | if(asn1f_count_children(expr) != ptype->params->params_count) { |
| 39 | FATAL("Number of actual arguments %d in %s at line %d " |
| 40 | "is not equal to number of expected arguments " |
| 41 | "%d in %s at line %d", |
| 42 | asn1f_count_children(expr), |
| 43 | asn1f_printable_reference(expr->reference), |
| 44 | expr->_lineno, |
| 45 | ptype->params->params_count, |
| 46 | ptype->Identifier, |
| 47 | ptype->_lineno |
| 48 | ); |
| 49 | return -1; |
| 50 | } |
| 51 | |
| 52 | /* |
| 53 | * Perform an expansion of a parametrized assignment. |
| 54 | */ |
| 55 | return asn1f_parametrize(arg, expr, ptype); |
| 56 | } |
| 57 | |
| 58 | #define SUBSTITUTE(to, from) do { \ |
| 59 | asn1p_expr_t tmp; \ |
| 60 | tmp = *(to); \ |
| 61 | *(to) = *(from); \ |
| 62 | *(from) = tmp; \ |
| 63 | (to)->next = tmp.next; \ |
| 64 | memset(&((from)->next), 0, \ |
| 65 | sizeof((from)->next)); \ |
| 66 | asn1p_expr_free(from); \ |
| 67 | } while(0) |
| 68 | |
| 69 | static int |
| 70 | asn1f_parametrize(arg_t *arg, asn1p_expr_t *expr, asn1p_expr_t *ptype) { |
| 71 | asn1p_expr_t *nex; |
| 72 | void *p; |
| 73 | int ret; |
| 74 | |
| 75 | /* |
| 76 | * The algorithm goes like that: |
| 77 | * 1. Replace the expression's type with parametrized type. |
| 78 | * 2. For every child in the parametrized type, import it |
| 79 | * as a child of the expression, replacing all occurences of |
| 80 | * symbols which are defined as parametrized type arguments |
| 81 | * with the actual values. |
| 82 | */ |
| 83 | |
| 84 | nex = asn1p_expr_clone(ptype); |
| 85 | if(nex == NULL) return -1; |
| 86 | |
| 87 | /* |
| 88 | * Cleanup the new expression so there is no ptype-related |
| 89 | * stuff hanging around. |
| 90 | */ |
| 91 | p = strdup(expr->Identifier); |
| 92 | if(p) { |
| 93 | free(nex->Identifier); |
| 94 | nex->Identifier = p; |
| 95 | } else { |
| 96 | asn1p_expr_free(nex); |
| 97 | return -1; |
| 98 | } |
| 99 | asn1p_paramlist_free(nex->params); |
| 100 | nex->params = NULL; |
| 101 | nex->meta_type = expr->meta_type; |
| 102 | |
| 103 | ret = asn1f_param_process_recursive(arg, nex, ptype, expr); |
| 104 | if(ret != 0) { |
| 105 | asn1p_expr_free(nex); |
| 106 | return ret; |
| 107 | } |
| 108 | |
| 109 | SUBSTITUTE(expr, nex); |
| 110 | |
| 111 | return ret; |
| 112 | } |
| 113 | |
| 114 | static int |
| 115 | asn1f_param_process_recursive(arg_t *arg, asn1p_expr_t *expr, asn1p_expr_t *ptype, asn1p_expr_t *actargs) { |
| 116 | asn1p_expr_t *child; |
| 117 | |
| 118 | TQ_FOR(child, &(expr->members), next) { |
| 119 | asn1p_expr_t *ra; |
| 120 | asn1p_expr_t *ne; |
| 121 | |
| 122 | ra = _referenced_argument(child->reference, ptype, actargs); |
| 123 | if(ra == NULL) continue; |
| 124 | |
| 125 | DEBUG("Substituting parameter for %s %s at line %d", |
| 126 | child->Identifier, |
| 127 | asn1f_printable_reference(child->reference), |
| 128 | child->_lineno |
| 129 | ); |
| 130 | |
| 131 | assert(child->meta_type == AMT_TYPEREF); |
| 132 | assert(child->expr_type == A1TC_REFERENCE); |
| 133 | |
| 134 | ne = asn1p_expr_clone(ra); |
| 135 | if(ne == NULL) return -1; |
| 136 | assert(ne->Identifier == 0); |
| 137 | ne->Identifier = strdup(child->Identifier); |
| 138 | if(ne->Identifier == 0) { |
| 139 | asn1p_expr_free(ne); |
| 140 | return -1; |
| 141 | } |
| 142 | SUBSTITUTE(child, ne); |
| 143 | } |
| 144 | |
| 145 | return 0; |
| 146 | } |
| 147 | |
| 148 | static asn1p_expr_t * |
| 149 | _referenced_argument(asn1p_ref_t *ref, asn1p_expr_t *ptype, asn1p_expr_t *actargs) { |
| 150 | asn1p_expr_t *aa; |
| 151 | int i; |
| 152 | |
| 153 | if(ref == NULL || ref->comp_count != 1) |
| 154 | return NULL; |
| 155 | |
| 156 | aa = TQ_FIRST(&(actargs->members)); |
| 157 | for(i = 0; i < ptype->params->params_count; |
| 158 | i++, aa = TQ_NEXT(aa, next)) { |
| 159 | if(strcmp(ref->components[0].name, |
| 160 | ptype->params->params[i].argument) == 0) |
| 161 | return aa; |
| 162 | } |
| 163 | |
| 164 | return NULL; |
| 165 | } |