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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99: */
// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "irregexp/RegExpStack.h"
#include "vm/Runtime.h"
using namespace js;
using namespace js::irregexp;
RegExpStackScope::RegExpStackScope(JSRuntime* rt)
: regexp_stack(&rt->regexpStack)
{}
RegExpStackScope::~RegExpStackScope()
{
regexp_stack->reset();
}
bool
irregexp::GrowBacktrackStack(JSRuntime* rt)
{
return rt->regexpStack.grow();
}
RegExpStack::RegExpStack()
: base_(nullptr), size(0), limit_(nullptr)
{}
RegExpStack::~RegExpStack()
{
js_free(base_);
}
bool
RegExpStack::init()
{
base_ = js_malloc(kMinimumStackSize);
if (!base_)
return false;
size = kMinimumStackSize;
updateLimit();
return true;
}
void
RegExpStack::reset()
{
MOZ_ASSERT(size >= kMinimumStackSize);
if (size != kMinimumStackSize) {
void* newBase = js_realloc(base_, kMinimumStackSize);
if (!newBase)
return;
base_ = newBase;
size = kMinimumStackSize;
updateLimit();
}
}
bool
RegExpStack::grow()
{
size_t newSize = size * 2;
if (newSize > kMaximumStackSize)
return false;
void* newBase = js_realloc(base_, newSize);
if (!newBase)
return false;
base_ = newBase;
size = newSize;
updateLimit();
return true;
}
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