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#include "asn1fix_internal.h"
static int _asn1f_copy_value(arg_t *arg, asn1p_expr_t *to,asn1p_expr_t *from);
int
asn1f_value_resolve(arg_t *arg, asn1p_expr_t *expr, const enum asn1p_constraint_type_e *opt_constr_type) {
asn1p_expr_t *val_type_expr;
asn1p_expr_t *value_expr;
asn1p_expr_t *type_expr;
int ret;
/* Make sure this IS a value assignment */
assert(expr->meta_type == AMT_VALUE);
assert(expr->value);
if(expr->value->type != ATV_REFERENCED)
return 0;
DEBUG("(=\"%s\", %x%s%s)",
asn1f_printable_value(expr->value), expr->expr_type,
opt_constr_type ? ", " : "",
opt_constr_type
? asn1p_constraint_type2str(*opt_constr_type) : ""
);
/*
* 1. Find the terminal type for this assignment.
*/
type_expr = asn1f_find_terminal_type(arg, expr);
if(type_expr == 0) {
if(errno == EEXIST) {
DEBUG("External type for %s at line %d",
expr->Identifier, expr->_lineno);
return 0;
} else {
FATAL("Terminal type for %s at line %d not found",
expr->Identifier, expr->_lineno);
return -1;
}
}
if(asn1f_look_value_in_type(arg, type_expr, expr) == -1) {
FATAL("Value not found in type for %s at line %d",
expr->Identifier, expr->_lineno);
return -1;
}
/*
* 2. Find the terminal value also.
*/
value_expr = asn1f_find_terminal_value(arg, expr);
if(value_expr) {
DEBUG("Terminal value for %s->%s is %s at line %d",
expr->Identifier, asn1f_printable_value(expr->value),
value_expr->Identifier, value_expr->_lineno);
} else {
FATAL("Terminal value for %s->%s not found",
expr->Identifier, asn1f_printable_value(expr->value));
return -1;
}
/*
* 3. Find the _type_ of a _terminal value_.
*/
WITH_MODULE(value_expr->module,
val_type_expr = asn1f_find_terminal_type(arg, value_expr));
if(val_type_expr) {
DEBUG("Terminal type of value %s->%s is %s at line %d",
expr->Identifier, asn1f_printable_value(expr->value),
val_type_expr->Identifier, val_type_expr->_lineno);
} else {
FATAL("Terminal type of value %s->%s not found",
expr->Identifier, asn1f_printable_value(expr->value));
return -1;
}
/*
* 4. Check compatibility between the type of the current expression
* and the type of the discovered value.
*/
if(opt_constr_type)
ret = asn1constraint_compatible(val_type_expr->expr_type,
*opt_constr_type, 0 /* must not matter here */);
else
ret = asn1f_check_type_compatibility(arg,
type_expr, val_type_expr);
if(ret == -1) {
switch(type_expr->expr_type) {
default:
if(!(type_expr->expr_type & ASN_STRING_MASK))
break;
/* Compatibility rules are not defined */
/* Fall through */
case ASN_BASIC_INTEGER:
case ASN_BASIC_ENUMERATED:
FATAL("Incompatible type of \"%s\" (%s) at line %d "
"with \"%s\" (%s) at line %d",
type_expr->Identifier,
ASN_EXPR_TYPE2STR(type_expr->expr_type),
type_expr->_lineno,
val_type_expr->Identifier,
ASN_EXPR_TYPE2STR(val_type_expr->expr_type),
val_type_expr->_lineno);
return -1;
case ASN_BASIC_OBJECT_IDENTIFIER:
/*
* Ignore this for now.
* We can't deal with OIDs inheritance properly yet.
*/
return 0;
}
WARNING("Possibly incompatible type of \"%s\" (%s) at line %d "
"with \"%s\" (%s) at line %d",
type_expr->Identifier,
ASN_EXPR_TYPE2STR(type_expr->expr_type),
type_expr->_lineno,
val_type_expr->Identifier,
ASN_EXPR_TYPE2STR(val_type_expr->expr_type),
val_type_expr->_lineno);
return 1;
}
if(asn1f_look_value_in_type(arg, val_type_expr, expr) == -1)
return -1;
/*
* 5. Copy value from the terminal value into the current expression.
*/
ret = _asn1f_copy_value(arg, expr, value_expr);
if(ret == -1) {
FATAL("Value %s cannot be copied from line %d to line %d",
asn1f_printable_value(value_expr->value),
value_expr->_lineno, expr->_lineno);
return -1;
}
DEBUG("Final value for \"%s\" at line %d is %s",
expr->Identifier, expr->_lineno,
asn1f_printable_value(expr->value));
return 0;
}
static int
_asn1f_copy_value(arg_t *arg, asn1p_expr_t *to, asn1p_expr_t *from) {
asn1p_value_t *v;
v = asn1p_value_clone(from->value);
if(v) {
asn1p_value_free(to->value);
to->value = v;
DEBUG("Copied value %s from \"%s\" on line %d "
"to \"%s\" on line %d",
asn1f_printable_value(v),
from->Identifier,
from->_lineno,
to->Identifier,
to->_lineno
);
return 0;
} else {
return -1;
}
}
int
asn1f_look_value_in_type(arg_t *arg,
asn1p_expr_t *type_expr,
asn1p_expr_t *value_expr) {
asn1p_expr_t *child_expr;
char *identifier;
if(value_expr->value->type != ATV_REFERENCED
|| value_expr->value->value.reference->comp_count != 1)
return 0;
if(type_expr->expr_type != ASN_BASIC_INTEGER
&& type_expr->expr_type != ASN_BASIC_ENUMERATED)
return 0;
DEBUG("(for %s in %s %x) for line %d",
asn1f_printable_value(value_expr->value),
type_expr->Identifier,
type_expr->expr_type,
value_expr->_lineno);
/*
* Look into the definitions of the type itself:
* Type1 ::= INTEGER { a(1), b(2) }
* value Type1 = b -- will assign 2
*/
identifier = value_expr->value->value.reference->components[0].name;
child_expr = asn1f_lookup_child(type_expr, identifier);
DEBUG("Looking into a type %s at line %d for %s at line %d: %s",
type_expr->Identifier, type_expr->_lineno,
identifier, value_expr->_lineno,
child_expr
? asn1f_printable_value(child_expr->value)
: "<not found>"
);
if(child_expr && child_expr->value) {
if(_asn1f_copy_value(arg, value_expr, child_expr))
return -1;
/* Fall through */
}
return 0;
}
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