AAX_CStringDataBuffer.h

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/*================================================================================================*/
/*
 *
 * Copyright 2023 Avid Technology, Inc.
 * All rights reserved.
 * 
 * CONFIDENTIAL: this document contains confidential information of Avid. Do
 * not disclose to any third party. Use of the information contained in this
 * document is subject to an Avid SDK license.
 *
 */
 
/*================================================================================================*/
 
#pragma once
 
#ifndef AAX_CStringDataBuffer_H
#define AAX_CStringDataBuffer_H
 
#include "AAX_IDataBuffer.h"
#include "AAX.h"
 
#include <string>
#include <limits>
#include <type_traits>
 
 
template <AAX_CTypeID T>
class AAX_CStringDataBufferOfType : public AAX_IDataBuffer
{
public:
    explicit AAX_CStringDataBufferOfType (std::string const & inData) : mData{inData} {}
    explicit AAX_CStringDataBufferOfType (std::string && inData) : mData{inData} {}
    explicit AAX_CStringDataBufferOfType (const char * inData) : mData{inData ? std::string{inData} : std::string{}} {}
 
    AAX_CStringDataBufferOfType(AAX_CStringDataBufferOfType const &) = delete;
    AAX_CStringDataBufferOfType(AAX_CStringDataBufferOfType &&) = delete;
 
    ~AAX_CStringDataBufferOfType (void) AAX_OVERRIDE = default;
    
    AAX_CStringDataBufferOfType& operator= (AAX_CStringDataBufferOfType const & other) = delete;
    AAX_CStringDataBufferOfType& operator= (AAX_CStringDataBufferOfType && other) = delete;
 
    AAX_Result Type(AAX_CTypeID * oType) const AAX_OVERRIDE {
        if (!oType) { return AAX_ERROR_NULL_ARGUMENT; }
        *oType = T;
        return AAX_SUCCESS;
    }
    AAX_Result Size(int32_t * oSize) const AAX_OVERRIDE {
        if (!oSize) { return AAX_ERROR_NULL_ARGUMENT; }
        auto const size = mData.size() + 1; // null termination
        static_assert(std::numeric_limits<decltype(size)>::max() >= std::numeric_limits<std::remove_pointer<decltype(oSize)>::type>::max(),
            "size variable may not represent all positive values of oSize");
        if (size > std::numeric_limits<std::remove_pointer<decltype(oSize)>::type>::max()) {
            return AAX_ERROR_SIGNED_INT_OVERFLOW;
        }
        *oSize = static_cast<std::remove_pointer<decltype(oSize)>::type>(size);
        return AAX_SUCCESS;
    }
    AAX_Result Data(void const ** oBuffer) const AAX_OVERRIDE {
        if (!oBuffer) { return AAX_ERROR_NULL_ARGUMENT; }
        *oBuffer = mData.c_str();
        return AAX_SUCCESS;
    }
private:
    std::string mData;
};
 
class AAX_CStringDataBuffer : public AAX_IDataBuffer
{
public:
    AAX_CStringDataBuffer (AAX_CTypeID inType, std::string const & inData) : mType{inType}, mData{inData} {}
    AAX_CStringDataBuffer (AAX_CTypeID inType, std::string && inData) : mType{inType}, mData{inData} {}
    AAX_CStringDataBuffer (AAX_CTypeID inType, const char * inData) : mType{inType}, mData{inData ? std::string{inData} : std::string{}} {}
 
    AAX_CStringDataBuffer(AAX_CStringDataBuffer const &) = delete;
    AAX_CStringDataBuffer(AAX_CStringDataBuffer &&) = delete;
 
    ~AAX_CStringDataBuffer (void) AAX_OVERRIDE = default;
    
    AAX_CStringDataBuffer& operator= (AAX_CStringDataBuffer const & other) = delete;
    AAX_CStringDataBuffer& operator= (AAX_CStringDataBuffer && other) = delete;
 
    AAX_Result Type(AAX_CTypeID * oType) const AAX_OVERRIDE {
        if (!oType) { return AAX_ERROR_NULL_ARGUMENT; }
        *oType = mType;
        return AAX_SUCCESS;
    }
    AAX_Result Size(int32_t * oSize) const AAX_OVERRIDE {
        if (!oSize) { return AAX_ERROR_NULL_ARGUMENT; }
        auto const size = mData.size() + 1; // null termination
        static_assert(std::numeric_limits<decltype(size)>::max() >= std::numeric_limits<std::remove_pointer<decltype(oSize)>::type>::max(),
            "size variable may not represent all positive values of oSize");
        if (size > std::numeric_limits<std::remove_pointer<decltype(oSize)>::type>::max()) {
            return AAX_ERROR_SIGNED_INT_OVERFLOW;
        }
        *oSize = static_cast<std::remove_pointer<decltype(oSize)>::type>(size);
        return AAX_SUCCESS;
    }
    AAX_Result Data(void const ** oBuffer) const AAX_OVERRIDE {
        if (!oBuffer) { return AAX_ERROR_NULL_ARGUMENT; }
        *oBuffer = mData.c_str();
        return AAX_SUCCESS;
    }
private:
    AAX_CTypeID const mType;
    std::string mData;
};
 
#endif