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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ppapi/shared_impl/array_var.h"
#include <limits>
#include "base/logging.h"
#include "base/memory/ref_counted.h"
#include "ppapi/shared_impl/ppapi_globals.h"
#include "ppapi/shared_impl/var_tracker.h"
namespace ppapi {
ArrayVar::ArrayVar() {}
ArrayVar::~ArrayVar() {}
// static
ArrayVar* ArrayVar::FromPPVar(const PP_Var& var) {
if (var.type != PP_VARTYPE_ARRAY)
return NULL;
scoped_refptr<Var> var_object(
PpapiGlobals::Get()->GetVarTracker()->GetVar(var));
if (!var_object.get())
return NULL;
return var_object->AsArrayVar();
}
ArrayVar* ArrayVar::AsArrayVar() { return this; }
PP_VarType ArrayVar::GetType() const { return PP_VARTYPE_ARRAY; }
PP_Var ArrayVar::Get(uint32_t index) const {
if (index >= elements_.size())
return PP_MakeUndefined();
const PP_Var& element = elements_[index].get();
if (PpapiGlobals::Get()->GetVarTracker()->AddRefVar(element))
return element;
else
return PP_MakeUndefined();
}
PP_Bool ArrayVar::Set(uint32_t index, const PP_Var& value) {
if (index == std::numeric_limits<uint32_t>::max())
return PP_FALSE;
if (index >= elements_.size()) {
// Insert ScopedPPVars of type PP_VARTYPE_UNDEFINED to reach the new size
// (index + 1).
elements_.resize(index + 1);
}
elements_[index] = value;
return PP_TRUE;
}
uint32_t ArrayVar::GetLength() const {
if (elements_.size() > std::numeric_limits<uint32_t>::max()) {
CHECK(false);
return 0;
}
return static_cast<uint32_t>(elements_.size());
}
PP_Bool ArrayVar::SetLength(uint32_t length) {
// If |length| is larger than the current size, ScopedPPVars of type
// PP_VARTYPE_UNDEFINED will be inserted to reach the new length.
elements_.resize(length);
return PP_TRUE;
}
} // namespace ppapi
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