mirror of https://gerrit.osmocom.org/asn1c
160 lines
4.1 KiB
C
160 lines
4.1 KiB
C
#include "asn1fix_internal.h"
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static int _asn1f_copy_value(arg_t *arg, asn1p_expr_t *to,asn1p_expr_t *from);
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int
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asn1f_value_resolve(arg_t *arg, asn1p_expr_t *expr) {
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asn1p_module_t *val_mod;
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asn1p_expr_t *val_type_expr;
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asn1p_expr_t *value_expr;
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asn1p_expr_t *type_expr;
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int ret;
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/* Make sure this IS a value assignment */
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assert(expr->meta_type == AMT_VALUE);
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assert(expr->value);
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DEBUG("%s(=\"%s\", %x)", __func__,
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asn1f_printable_value(expr->value), expr->expr_type);
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/*
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* 1. Find the terminal type for this assignment.
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*/
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type_expr = asn1f_find_terminal_type(arg, expr, 0);
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if(type_expr == 0) {
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DEBUG("\tTerminal type for %s not found", expr->Identifier);
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return -1;
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}
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if(asn1f_look_value_in_type(arg, type_expr, expr) == -1)
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return -1;
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/*
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* 2. Find the terminal value also.
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*/
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value_expr = asn1f_find_terminal_value(arg, expr, &val_mod);
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if(value_expr) {
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DEBUG("\tTerminal value for %s->%s is %s at line %d",
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expr->Identifier, asn1f_printable_value(expr->value),
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value_expr->Identifier, value_expr->_lineno);
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} else {
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DEBUG("\tTerminal value for %s->%s not found",
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expr->Identifier, asn1f_printable_value(expr->value));
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return -1;
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}
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/*
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* 3. Find the _type_ of a _terminal value_.
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*/
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WITH_MODULE(val_mod,
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val_type_expr = asn1f_find_terminal_type(arg, value_expr, 0));
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if(val_type_expr) {
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DEBUG("\tTerminal type of value %s->%s is %s at line %d",
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expr->Identifier, asn1f_printable_value(expr->value),
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val_type_expr->Identifier, val_type_expr->_lineno);
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} else {
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DEBUG("\tTerminal type of value %s->%s not found",
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expr->Identifier, asn1f_printable_value(expr->value));
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return -1;
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}
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/*
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* 4. Check compatibility between the type of the current expression
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* and the type of the discovered value.
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*/
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ret = asn1f_check_type_compatibility(arg, type_expr, val_type_expr);
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if(ret == -1) {
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DEBUG("\tIncompatible type of %s at %d with %s at %d",
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type_expr->Identifier, type_expr->_lineno,
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val_type_expr->Identifier, val_type_expr->_lineno);
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return -1;
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}
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if(asn1f_look_value_in_type(arg, val_type_expr, expr) == -1)
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return -1;
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/*
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* 5. Copy value from the terminal value into the current expression.
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*/
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ret = _asn1f_copy_value(arg, expr, value_expr);
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if(ret == -1) {
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DEBUG("\tValue %s cannot be copied from line %d to line %d",
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asn1f_printable_value(value_expr->value),
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value_expr->_lineno, expr->_lineno);
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return -1;
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}
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DEBUG("\tFinal value for \"%s\" at line %d is %s",
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expr->Identifier, expr->_lineno,
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asn1f_printable_value(expr->value));
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return 0;
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}
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static int
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_asn1f_copy_value(arg_t *arg, asn1p_expr_t *to, asn1p_expr_t *from) {
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asn1p_value_t *v;
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v = asn1p_value_clone(from->value);
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if(v) {
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asn1p_value_free(to->value);
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to->value = v;
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DEBUG("Copied value %s from \"%s\" on line %d "
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"to \"%s\" on line %d",
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asn1f_printable_value(v),
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from->Identifier,
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from->_lineno,
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to->Identifier,
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to->_lineno
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);
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return 0;
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} else {
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return -1;
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}
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}
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int
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asn1f_look_value_in_type(arg_t *arg,
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asn1p_expr_t *type_expr,
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asn1p_expr_t *value_expr) {
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asn1p_expr_t *child_expr;
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char *identifier;
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if(value_expr->value->type != ATV_REFERENCED
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|| value_expr->value->value.reference->comp_count != 1)
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return 0;
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if(type_expr->expr_type != ASN_BASIC_INTEGER
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&& type_expr->expr_type != ASN_BASIC_ENUMERATED)
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return 0;
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DEBUG("%s(for %s in %s %x) for line %d", __func__,
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asn1f_printable_value(value_expr->value),
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type_expr->Identifier,
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type_expr->expr_type,
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value_expr->_lineno);
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/*
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* Look into the definitions of the type itself:
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* Type1 ::= INTEGER { a(1), b(2) }
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* value Type1 = b -- will assign 2
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*/
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identifier = value_expr->value->value.reference->components[0].name;
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child_expr = asn1f_lookup_child(type_expr, identifier);
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DEBUG("\tLooking into a type %s at line %d for %s at line %d: %s",
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type_expr->Identifier, type_expr->_lineno,
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identifier, value_expr->_lineno,
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child_expr
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? asn1f_printable_value(child_expr->value)
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: "<not found>"
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);
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if(child_expr && child_expr->value) {
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if(_asn1f_copy_value(arg, value_expr, child_expr))
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return -1;
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/* Fall through */
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}
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return 0;
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}
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