/*

Copyright (C) 2016 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

Part of Core Audio AUInstrument Base Classes

*/

#include "SynthNoteList.h"

#include <stdexcept>

void SynthNoteList::SanityCheck() const

{

    if (mState >= kNoteState_Unset) {

        throw std::runtime_error("SanityCheck: mState is bad");

    }

    if (mHead == NULL) {

        if (mTail != NULL) 

            throw std::runtime_error("SanityCheck: mHead is NULL but not mTail");

        return;

    }

    if (mTail == NULL) {

        throw std::runtime_error("SanityCheck: mTail is NULL but not mHead");

    }

    if (mHead->mPrev) {

        throw std::runtime_error("SanityCheck: mHead has a mPrev");

    }

    if (mTail->mNext) {

        throw std::runtime_error("SanityCheck: mTail has a mNext");

    }

    SynthNote *note = mHead;

    while (note)

    {

        if (note->mState != mState)

            throw std::runtime_error("SanityCheck: note in wrong state");

        if (note->mNext) {

            if (note->mNext->mPrev != note)

                throw std::runtime_error("SanityCheck: bad link 1");

        } else {

            if (mTail != note)

                throw std::runtime_error("SanityCheck: note->mNext is nil, but mTail != note");

        }

        if (note->mPrev) {

            if (note->mPrev->mNext != note)

                throw std::runtime_error("SanityCheck: bad link 2");

        } else {

            if (mHead != note)

                throw std::runtime_error("SanityCheck: note->mPrev is nil, but mHead != note");

        }

        note = note->mNext;

    }

}