void RlistFlatten(EvalContext *ctx, Rlist **list)
{
for (Rlist *rp = *list; rp != NULL;)
{
if (rp->val.type != RVAL_TYPE_SCALAR)
{
rp = rp->next;
continue;
}
char naked[CF_BUFSIZE] = "";
if (IsNakedVar(RlistScalarValue(rp), '@'))
{
GetNaked(naked, RlistScalarValue(rp));
if (!IsExpandable(naked))
{
Rval rv;
VarRef *ref = VarRefParse(naked);
bool var_found = EvalContextVariableGet(ctx, ref, &rv, NULL);
VarRefDestroy(ref);
if (var_found)
{
switch (rv.type)
{
case RVAL_TYPE_LIST:
for (const Rlist *srp = rv.item; srp != NULL; srp = srp->next)
{
RlistAppendRval(list, RvalCopy(srp->val));
}
Rlist *next = rp->next;
RlistDestroyEntry(list, rp);
rp = next;
continue;
default:
ProgrammingError("List variable does not resolve to a list");
RlistAppendRval(list, RvalCopy(rp->val));
break;
}
}
}
}
rp = rp->next;
}
}
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
for (Rlist *rp = *list; rp != NULL;)
{
if (rp->type != RVAL_TYPE_SCALAR)
{
rp = rp->next;
continue;
}
char naked[CF_BUFSIZE] = "";
if (IsNakedVar(rp->item, '@'))
{
GetNaked(naked, rp->item);
Rval rv;
if (EvalContextVariableGet(ctx, (VarRef) { NULL, ScopeGetCurrent()->scope, naked }, &rv, NULL))
{
switch (rv.type)
{
case RVAL_TYPE_LIST:
for (const Rlist *srp = rv.item; srp != NULL; srp = srp->next)
{
RlistAppend(list, srp->item, srp->type);
}
Rlist *next = rp->next;
RlistDestroyEntry(list, rp);
rp = next;
continue;
default:
ProgrammingError("List variable does not resolve to a list");
RlistAppend(list, rp->item, rp->type);
break;
}
}
}
rp = rp->next;
}
}
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
Rlist *prev = NULL, *next;
for (Rlist *rp = *list; rp != NULL; rp = next)
{
next = rp->next;
if (rp->val.type != RVAL_TYPE_SCALAR)
{
prev = rp;
continue;
}
char naked[CF_BUFSIZE] = "";
if (IsNakedVar(RlistScalarValue(rp), '@'))
{
GetNaked(naked, RlistScalarValue(rp));
if (!IsExpandable(naked))
{
VarRef *ref = VarRefParse(naked);
DataType value_type = CF_DATA_TYPE_NONE;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (value)
{
switch (DataTypeToRvalType(value_type))
{
case RVAL_TYPE_LIST:
{
RlistDestroyEntry(list, rp);
for (const Rlist *srp = value; srp != NULL; srp = srp->next)
{
Rlist *nrp = xmalloc(sizeof(Rlist));
nrp->val = RvalCopy(srp->val);
nrp->next = next;
if (prev)
{
prev->next = nrp;
}
else
{
*list = nrp;
}
prev = nrp;
}
}
continue;
default:
Log(LOG_LEVEL_WARNING, "Attempted to dereference variable '%s' using @ but variable did not resolve to a list",
RlistScalarValue(rp));
break;
}
}
}
}
prev = rp;
}
}
/**
* @brief Flattens an Rlist by expanding naked scalar list-variable
* members. Flattening is only one-level deep.
*/
void RlistFlatten(EvalContext *ctx, Rlist **list)
{
Rlist *next;
for (Rlist *rp = *list; rp != NULL; rp = next)
{
next = rp->next;
if (rp->val.type == RVAL_TYPE_SCALAR &&
IsNakedVar(RlistScalarValue(rp), '@'))
{
char naked[CF_MAXVARSIZE];
GetNaked(naked, RlistScalarValue(rp));
/* Make sure there are no inner expansions to take place, like if
* rp was "@{blah_$(blue)}". */
if (!IsExpandable(naked))
{
Log(LOG_LEVEL_DEBUG,
"Flattening slist: %s", RlistScalarValue(rp));
VarRef *ref = VarRefParse(naked);
DataType value_type;
const void *value = EvalContextVariableGet(ctx, ref, &value_type);
VarRefDestroy(ref);
if (value_type == CF_DATA_TYPE_NONE)
{
assert(value == NULL);
continue; /* undefined variable */
}
if (DataTypeToRvalType(value_type) != RVAL_TYPE_LIST)
{
Log(LOG_LEVEL_WARNING,
"'%s' failed - variable is not list but %s",
RlistScalarValue(rp), DataTypeToString(value_type));
continue;
}
/* NOTE: Remember that value can be NULL as an empty Rlist. */
/* at_node: just a mnemonic name for the
list node with @{blah}. */
Rlist *at_node = rp;
Rlist *insert_after = at_node;
for (const Rlist *rp2 = value; rp2 != NULL; rp2 = rp2->next)
{
assert(insert_after != NULL);
RlistInsertAfter(insert_after, RvalCopy(rp2->val));
insert_after = insert_after->next;
}
/* Make sure we won't miss any element. */
assert(insert_after->next == next);
RlistDestroyEntry(list, at_node); /* Delete @{blah} entry */
char *list_s = RlistToString(*list);
Log(LOG_LEVEL_DEBUG, "Flattened slist: %s", list_s);
free(list_s);
}
}
}
}
PromiseResult VerifyVarPromise(EvalContext *ctx, const Promise *pp, bool allow_duplicates)
{
ConvergeVariableOptions opts = CollectConvergeVariableOptions(ctx, pp, allow_duplicates);
if (!opts.should_converge)
{
return PROMISE_RESULT_NOOP;
}
Attributes a = { {0} };
// More consideration needs to be given to using these
//a.transaction = GetTransactionConstraints(pp);
a.classes = GetClassDefinitionConstraints(ctx, pp);
VarRef *ref = VarRefParseFromBundle(pp->promiser, PromiseGetBundle(pp));
if (strcmp("meta", pp->parent_promise_type->name) == 0)
{
VarRefSetMeta(ref, true);
}
DataType existing_value_type = CF_DATA_TYPE_NONE;
const void *const existing_value =
IsExpandable(pp->promiser) ? NULL : EvalContextVariableGet(ctx, ref, &existing_value_type);
PromiseResult result = PROMISE_RESULT_NOOP;
Rval rval = opts.cp_save->rval;
if (rval.item != NULL)
{
DataType data_type = DataTypeFromString(opts.cp_save->lval);
if (opts.cp_save->rval.type == RVAL_TYPE_FNCALL)
{
FnCall *fp = RvalFnCallValue(rval);
const FnCallType *fn = FnCallTypeGet(fp->name);
if (!fn)
{
assert(false && "Canary: should have been caught before this point");
FatalError(ctx, "While setting variable '%s' in bundle '%s', unknown function '%s'",
pp->promiser, PromiseGetBundle(pp)->name, fp->name);
}
if (fn->dtype != DataTypeFromString(opts.cp_save->lval))
{
FatalError(ctx, "While setting variable '%s' in bundle '%s', variable declared type '%s' but function '%s' returns type '%s'",
pp->promiser, PromiseGetBundle(pp)->name, opts.cp_save->lval,
fp->name, DataTypeToString(fn->dtype));
}
if (existing_value_type != CF_DATA_TYPE_NONE)
{
// Already did this
VarRefDestroy(ref);
return PROMISE_RESULT_NOOP;
}
FnCallResult res = FnCallEvaluate(ctx, PromiseGetPolicy(pp), fp, pp);
if (res.status == FNCALL_FAILURE)
{
/* We do not assign variables to failed fn calls */
RvalDestroy(res.rval);
VarRefDestroy(ref);
return PROMISE_RESULT_NOOP;
}
else
{
rval = res.rval;
}
}
else
{
Buffer *conv = BufferNew();
bool malformed = false, misprint = false;
if (strcmp(opts.cp_save->lval, "int") == 0)
{
long int asint = IntFromString(opts.cp_save->rval.item);
if (asint == CF_NOINT)
{
malformed = true;
}
else if (0 > BufferPrintf(conv, "%ld", asint))
{
misprint = true;
}
else
{
rval = RvalNew(BufferData(conv), opts.cp_save->rval.type);
}
}
else if (strcmp(opts.cp_save->lval, "real") == 0)
{
double real_value;
if (!DoubleFromString(opts.cp_save->rval.item, &real_value))
{
malformed = true;
}
else if (0 > BufferPrintf(conv, "%lf", real_value))
{
misprint = true;
}
else
{
rval = RvalNew(BufferData(conv), opts.cp_save->rval.type);
}
}
else
{
rval = RvalCopy(opts.cp_save->rval);
}
BufferDestroy(conv);
if (malformed)
{
/* Arises when opts->cp_save->rval.item isn't yet expanded. */
/* Has already been logged by *FromString */
VarRefDestroy(ref);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
else if (misprint)
{
/* Even though no problems with memory allocation can
* get here, there might be other problems. */
UnexpectedError("Problems writing to buffer");
VarRefDestroy(ref);
return PROMISE_RESULT_NOOP;
}
else if (rval.type == RVAL_TYPE_LIST)
{
Rlist *rval_list = RvalRlistValue(rval);
RlistFlatten(ctx, &rval_list);
rval.item = rval_list;
}
}
if (Epimenides(ctx, PromiseGetBundle(pp)->ns, PromiseGetBundle(pp)->name, pp->promiser, rval, 0))
{
Log(LOG_LEVEL_ERR, "Variable '%s' contains itself indirectly - an unkeepable promise", pp->promiser);
exit(EXIT_FAILURE);
}
else
{
/* See if the variable needs recursively expanding again */
Rval returnval = EvaluateFinalRval(ctx, PromiseGetPolicy(pp), ref->ns, ref->scope, rval, true, pp);
RvalDestroy(rval);
// freed before function exit
rval = returnval;
}
if (existing_value_type != CF_DATA_TYPE_NONE)
{
if (!opts.ok_redefine) /* only on second iteration, else we ignore broken promises */
{
if (THIS_AGENT_TYPE == AGENT_TYPE_COMMON &&
!CompareRval(existing_value, DataTypeToRvalType(existing_value_type),
rval.item, rval.type))
{
switch (rval.type)
{
case RVAL_TYPE_SCALAR:
Log(LOG_LEVEL_VERBOSE, "V: Redefinition of a constant scalar '%s', was '%s' now '%s'",
pp->promiser, (const char *)existing_value, RvalScalarValue(rval));
PromiseRef(LOG_LEVEL_VERBOSE, pp);
break;
case RVAL_TYPE_LIST:
{
Log(LOG_LEVEL_VERBOSE, "V: Redefinition of a constant list '%s'", pp->promiser);
Writer *w = StringWriter();
RlistWrite(w, existing_value);
char *oldstr = StringWriterClose(w);
Log(LOG_LEVEL_VERBOSE, "Old value '%s'", oldstr);
free(oldstr);
w = StringWriter();
RlistWrite(w, rval.item);
char *newstr = StringWriterClose(w);
Log(LOG_LEVEL_VERBOSE, "V: New value '%s'", newstr);
free(newstr);
PromiseRef(LOG_LEVEL_VERBOSE, pp);
}
break;
case RVAL_TYPE_CONTAINER:
case RVAL_TYPE_FNCALL:
case RVAL_TYPE_NOPROMISEE:
break;
}
}
RvalDestroy(rval);
VarRefDestroy(ref);
return result;
}
}
if (IsCf3VarString(pp->promiser))
{
// Unexpanded variables, we don't do anything with
RvalDestroy(rval);
VarRefDestroy(ref);
return result;
}
if (!IsValidVariableName(pp->promiser))
{
Log(LOG_LEVEL_ERR, "Variable identifier contains illegal characters");
PromiseRef(LOG_LEVEL_ERR, pp);
RvalDestroy(rval);
VarRefDestroy(ref);
return result;
}
if (rval.type == RVAL_TYPE_LIST)
{
if (opts.drop_undefined)
{
Rlist *stripped = RvalRlistValue(rval);
Rlist *entry = stripped;
while (entry)
{
Rlist *delete_me = NULL;
if (IsNakedVar(RlistScalarValue(entry), '@'))
{
delete_me = entry;
}
entry = entry->next;
RlistDestroyEntry(&stripped, delete_me);
}
rval.item = stripped;
}
for (const Rlist *rp = RvalRlistValue(rval); rp; rp = rp->next)
{
switch (rp->val.type)
{
case RVAL_TYPE_SCALAR:
break;
default:
// Cannot assign variable because value is a list containing a non-scalar item
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
}
}
if (ref->num_indices > 0)
{
if (data_type == CF_DATA_TYPE_CONTAINER)
{
char *lval_str = VarRefToString(ref, true);
Log(LOG_LEVEL_ERR, "Cannot assign a container to an indexed variable name '%s'. Should be assigned to '%s' instead",
lval_str, ref->lval);
free(lval_str);
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
else
{
DataType existing_type = CF_DATA_TYPE_NONE;
VarRef *base_ref = VarRefCopyIndexless(ref);
if (EvalContextVariableGet(ctx, ref, &existing_type) && existing_type == CF_DATA_TYPE_CONTAINER)
{
char *lval_str = VarRefToString(ref, true);
char *base_ref_str = VarRefToString(base_ref, true);
Log(LOG_LEVEL_ERR, "Cannot assign value to indexed variable name '%s', because a container is already assigned to the base name '%s'",
lval_str, base_ref_str);
free(lval_str);
free(base_ref_str);
VarRefDestroy(base_ref);
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
VarRefDestroy(base_ref);
}
}
DataType required_datatype = DataTypeFromString(opts.cp_save->lval);
if (rval.type != DataTypeToRvalType(required_datatype))
{
char *ref_str = VarRefToString(ref, true);
char *value_str = RvalToString(rval);
Log(LOG_LEVEL_ERR, "Variable '%s' expected a variable of type '%s', but was given incompatible value '%s'",
ref_str, DataTypeToString(required_datatype), value_str);
PromiseRef(LOG_LEVEL_ERR, pp);
free(ref_str);
free(value_str);
VarRefDestroy(ref);
RvalDestroy(rval);
return PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
if (!EvalContextVariablePut(ctx, ref, rval.item, required_datatype, "source=promise"))
{
Log(LOG_LEVEL_VERBOSE,
"Unable to converge %s.%s value (possibly empty or infinite regression)",
ref->scope, pp->promiser);
PromiseRef(LOG_LEVEL_VERBOSE, pp);
result = PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
else
{
Rlist *promise_meta = PromiseGetConstraintAsList(ctx, "meta", pp);
if (promise_meta)
{
StringSet *class_meta = EvalContextVariableTags(ctx, ref);
Buffer *print;
for (const Rlist *rp = promise_meta; rp; rp = rp->next)
{
StringSetAdd(class_meta, xstrdup(RlistScalarValue(rp)));
print = StringSetToBuffer(class_meta, ',');
Log(LOG_LEVEL_DEBUG,
"Added tag %s to class %s, tags now [%s]",
RlistScalarValue(rp), pp->promiser, BufferData(print));
BufferDestroy(print);
}
}
}
}
else
{
Log(LOG_LEVEL_ERR, "Variable %s has no promised value", pp->promiser);
Log(LOG_LEVEL_ERR, "Rule from %s at/before line %zu", PromiseGetBundle(pp)->source_path, opts.cp_save->offset.line);
result = PromiseResultUpdate(result, PROMISE_RESULT_FAIL);
}
/*
* FIXME: Variable promise are exempt from normal evaluation logic still, so
* they are not pushed to evaluation stack before being evaluated. Due to
* this reason, we cannot call cfPS here to set classes, as it will error
* out with ProgrammingError.
*
* In order to support 'classes' body for variables as well, we call
* ClassAuditLog explicitly.
*/
ClassAuditLog(ctx, pp, a, result);
VarRefDestroy(ref);
RvalDestroy(rval);
return result;
}
