BufferView.hpp

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#pragma once
 
#include "common.hpp"
 
#include <span>
 
namespace jsocketpp
{
struct BufferView
{
    void* data{};       
    std::size_t size{}; 
};
 
namespace internal
{
#ifdef _WIN32

[[nodiscard]] inline std::vector<WSABUF> toWSABUF(const BufferView* buffers, const std::size_t count)
{
    std::vector<WSABUF> vec(count);
    for (std::size_t i = 0; i < count; ++i)
    {
        vec[i].len = static_cast<ULONG>(buffers[i].size);
        vec[i].buf = static_cast<CHAR*>(buffers[i].data);
    }
    return vec;
}

[[nodiscard]] inline std::vector<WSABUF> toWSABUF(const std::span<const BufferView> buffers)
{
    return toWSABUF(buffers.data(), buffers.size());
}
 
#else

[[nodiscard]] inline std::vector<iovec> toIOVec(const BufferView* buffers, const std::size_t count)
{
    std::vector<iovec> vec(count);
    for (std::size_t i = 0; i < count; ++i)
    {
        vec[i].iov_base = buffers[i].data;
        vec[i].iov_len = buffers[i].size;
    }
    return vec;
}

[[nodiscard]] inline std::vector<iovec> toIOVec(const std::span<const BufferView> buffers)
{
    return toIOVec(buffers.data(), buffers.size());
}
 
#endif
} // namespace internal
 
} // namespace jsocketpp