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#include "asn1fix_internal.h"
typedef struct resolver_arg {
asn1p_expr_t *(*resolver)(asn1p_expr_t *, void *arg);
arg_t *arg;
asn1p_expr_t *original_expr;
asn1p_paramlist_t *lhs_params;
asn1p_expr_t *rhs_pspecs;
} resolver_arg_t;
static asn1p_expr_t *resolve_expr(asn1p_expr_t *, void *resolver_arg);
static int compare_specializations(arg_t *, asn1p_expr_t *a, asn1p_expr_t *b);
static asn1p_expr_t *find_target_specialization_byref(resolver_arg_t *rarg, asn1p_ref_t *ref);
static asn1p_expr_t *find_target_specialization_bystr(resolver_arg_t *rarg, char *str);
asn1p_expr_t *
asn1f_parameterization_fork(arg_t *arg, asn1p_expr_t *expr, asn1p_expr_t *rhs_pspecs) {
resolver_arg_t rarg; /* resolver argument */
asn1p_expr_t *exc; /* expr clone */
asn1p_expr_t *rpc; /* rhs_pspecs clone */
void *p;
struct asn1p_pspec_s *pspec;
int npspecs;
assert(rhs_pspecs);
assert(expr->lhs_params);
assert(expr->parent_expr == 0);
DEBUG("Forking parameterization at %d for %s (%d alr)",
rhs_pspecs->_lineno, expr->Identifier,
expr->specializations.pspecs_count);
/*
* Find if this exact specialization has been used already.
*/
for(npspecs = 0;
npspecs < expr->specializations.pspecs_count;
npspecs++) {
if(compare_specializations(arg, rhs_pspecs,
expr->specializations.pspec[npspecs].rhs_pspecs) == 0) {
DEBUG("Reused parameterization for %s",
expr->Identifier);
return expr->specializations.pspec[npspecs].my_clone;
}
}
rarg.resolver = resolve_expr;
rarg.arg = arg;
rarg.original_expr = expr;
rarg.lhs_params = expr->lhs_params;
rarg.rhs_pspecs = rhs_pspecs;
exc = asn1p_expr_clone_with_resolver(expr, resolve_expr, &rarg);
if(!exc) return NULL;
rpc = asn1p_expr_clone(rhs_pspecs, 0);
assert(rpc);
/*
* Create a new specialization.
*/
npspecs = expr->specializations.pspecs_count;
p = realloc(expr->specializations.pspec,
(npspecs + 1) * sizeof(expr->specializations.pspec[0]));
assert(p);
expr->specializations.pspec = p;
pspec = &expr->specializations.pspec[npspecs];
memset(pspec, 0, sizeof *pspec);
pspec->rhs_pspecs = rpc;
pspec->my_clone = exc;
exc->spec_index = npspecs;
DEBUG("Forked new parameterization for %s", expr->Identifier);
/* Commit */
expr->specializations.pspecs_count = npspecs + 1;
return exc;
}
static int
compare_specializations(arg_t *arg, asn1p_expr_t *a, asn1p_expr_t *b) {
asn1p_expr_t *ac = TQ_FIRST(&a->members);
asn1p_expr_t *bc = TQ_FIRST(&b->members);
for(;ac && bc; ac = TQ_NEXT(ac, next), bc = TQ_NEXT(bc, next)) {
retry:
if(ac == bc) continue;
if(ac->meta_type != bc->meta_type) break;
if(ac->expr_type != bc->expr_type) break;
if(!ac->reference && !bc->reference)
continue;
if(ac->reference) {
ac = asn1f_lookup_symbol(arg,
ac->module, ac->rhs_pspecs, ac->reference);
if(!ac) break;
}
if(bc->reference) {
bc = asn1f_lookup_symbol(arg,
bc->module, bc->rhs_pspecs, bc->reference);
if(!bc) break;
}
goto retry;
}
if(ac || bc)
/* Specializations do not match: different size option sets */
return -1;
return 0;
}
static asn1p_expr_t *
resolve_expr(asn1p_expr_t *expr_to_resolve, void *resolver_arg) {
resolver_arg_t *rarg = resolver_arg;
arg_t *arg = rarg->arg;
asn1p_expr_t *expr;
asn1p_expr_t *nex;
DEBUG("Resolving %s (meta %d)",
expr_to_resolve->Identifier, expr_to_resolve->meta_type);
if(expr_to_resolve->meta_type == AMT_TYPEREF) {
expr = find_target_specialization_byref(rarg,
expr_to_resolve->reference);
if(!expr) return NULL;
} else if(expr_to_resolve->meta_type == AMT_VALUE) {
assert(expr_to_resolve->value);
expr = find_target_specialization_bystr(rarg,
expr_to_resolve->Identifier);
if(!expr) return NULL;
} else {
errno = ESRCH;
return NULL;
}
DEBUG("Found target %s (%d/%x)",
expr->Identifier, expr->meta_type, expr->expr_type);
if(expr->meta_type == AMT_TYPE
|| expr->meta_type == AMT_VALUE
|| expr->meta_type == AMT_TYPEREF
|| expr->meta_type == AMT_VALUESET) {
DEBUG("Target is a simple type %s",
ASN_EXPR_TYPE2STR(expr->expr_type));
nex = asn1p_expr_clone(expr, 0);
free(nex->Identifier);
nex->Identifier = expr_to_resolve->Identifier
? strdup(expr_to_resolve->Identifier) : 0;
return nex;
} else {
FATAL("Feature not implemented for %s (%d/%x), "
"please contact the asn1c author",
rarg->original_expr->Identifier,
expr->meta_type, expr->expr_type);
errno = EPERM;
return NULL;
}
return NULL;
}
static asn1p_expr_t *
find_target_specialization_byref(resolver_arg_t *rarg, asn1p_ref_t *ref) {
char *refstr;
if(!ref || ref->comp_count != 1) {
errno = ESRCH;
return NULL;
}
refstr = ref->components[0].name; /* T */
return find_target_specialization_bystr(rarg, refstr);
}
static asn1p_expr_t *
find_target_specialization_bystr(resolver_arg_t *rarg, char *refstr) {
arg_t *arg = rarg->arg;
asn1p_expr_t *target;
int i;
target = TQ_FIRST(&rarg->rhs_pspecs->members);
for(i = 0; i < rarg->lhs_params->params_count;
i++, target = TQ_NEXT(target, next)) {
struct asn1p_param_s *param = &rarg->lhs_params->params[i];
if(!target) break;
if(strcmp(param->argument, refstr))
continue;
return target;
}
if(i != rarg->lhs_params->params_count) {
FATAL("Parameterization of %s failed: "
"parameters number mismatch",
rarg->original_expr->Identifier);
errno = EPERM;
return NULL;
}
errno = ESRCH;
return NULL;
}
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