FlatFieldRefAndKey.h

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/*
* Copyright Onix Solutions Limited [OnixS]. All rights reserved.
*
* This software owned by Onix Solutions Limited [OnixS] and is protected by copyright law
* and international copyright treaties.
*
* Access to and use of the software is governed by the terms of the applicable OnixS Software
* Services Agreement (the Agreement) and Customer end user license agreements granting
* a non-assignable, non-transferable and non-exclusive license to use the software
* for it's own data processing purposes under the terms defined in the Agreement.
*
* Except as otherwise granted within the terms of the Agreement, copying or reproduction of any part
* of this source code or associated reference material to any other location for further reproduction
* or redistribution, and any amendments to this copyright notice, are expressly prohibited.
*
* Any reproduction or redistribution for sale or hiring of the Software not in accordance with
* the terms of the Agreement is a violation of copyright law.
*/
 
#pragma once
 
#include <cstdlib>
 
namespace OnixS {
namespace FIX {
 
struct KnownFlatFieldKeys;

class FlatFieldRef
{
public:
    FlatFieldRef()
        : valueOffset_(0),
          valueSize_(0) {
    }

    FlatFieldRef(size_t valueOffset, size_t valueSize)
        : valueOffset_(valueOffset), valueSize_(valueSize) {
    }

    size_t valueOffset() const {
        return valueOffset_;
    }

    size_t valueSize() const {
        return valueSize_;
    }

    operator bool() const {
        return (0 != valueOffset_);
    }

    bool
    operator == (
        const FlatFieldRef & other) const {
        return (
                   valueOffset_ == other.valueOffset_ &&
                   valueSize_ == other.valueSize_);
    }

    bool
    operator != (
        const FlatFieldRef & other) const {
        return (
                   valueOffset_ != other.valueOffset_ ||
                   valueSize_ != other.valueSize_);
    }
 
private:
 
    size_t valueOffset_;
    size_t valueSize_;
};
 
typedef FlatFieldRef SerializedFieldRef;

class FlatFieldKey
{
public:
    FlatFieldKey()
        : key_(static_cast<size_t>(-1)) {
    }
 
    // Initializes valid key.
    explicit FlatFieldKey(size_t key)
        : key_(key) {
    }

    operator size_t() const {
        return key_;
    }

    bool
    operator ==(
        const FlatFieldKey & other) const {
        return (key_ == other.key_);
    }

    bool
    operator !=(
        const FlatFieldKey & other) const {
        return (key_ != other.key_);
    }
 
private:
 
    friend
    struct
        KnownFlatFieldKeys;
 
    // Numeric value of the key.
    size_t key_;
};
 
typedef FlatFieldKey SerializedFieldKey;

struct KnownFlatFieldKeys {
    static
    FlatFieldKey
    bodyLength() {
        return FlatFieldKey(0);
    }

    static
    FlatFieldKey
    msgType() {
        return FlatFieldKey(1);
    }

    static
    FlatFieldKey
    seqNumber() {
        return FlatFieldKey(2);
    }

    static
    FlatFieldKey
    sendingTime() {
        return FlatFieldKey(3);
    }

    static
    FlatFieldKey
    dynamic() {
        return FlatFieldKey(4);
    }
};
 
typedef KnownFlatFieldKeys KnownSerializedFieldKeys;
 
}
}