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// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
#ifndef INCLUDED_GRAS_IO_SIGNATURE_HPP
#define INCLUDED_GRAS_IO_SIGNATURE_HPP
#include <gras/gras.hpp>
#include <vector>
#include <stdexcept>
namespace gras
{
/*!
* An IO signature describes the input or output specifications
* for the streaming input or output ports of a block.
* Properties are a maximum and minimum number of ports,
* and an item size in bytes for each port.
*/
struct IOSignature : std::vector<unsigned>
{
static const int IO_INFINITE = ~0;
//! Create an empty signature
IOSignature(void)
{
this->set_min_streams(IO_INFINITE);
this->set_max_streams(IO_INFINITE);
}
//! Create a signature with a single item size
IOSignature(const unsigned size)
{
this->push_back(size);
this->set_min_streams(IO_INFINITE);
this->set_max_streams(IO_INFINITE);
}
//! Create a signature with the specified min and max streams
IOSignature(const int min_streams, const int max_streams)
{
if (min_streams > max_streams and max_streams != IO_INFINITE)
{
throw std::invalid_argument("io signature fail: min_streams > max_streams");
}
this->set_min_streams(min_streams);
this->set_max_streams(max_streams);
}
//! Create a signature from a vector of IO widths
IOSignature(const std::vector<unsigned> &sig)
{
this->assign(sig.begin(), sig.end());
this->set_min_streams(IO_INFINITE);
this->set_max_streams(IO_INFINITE);
}
//! Construct from pointer for backwards compatible shared_ptr usage.
explicit IOSignature(const IOSignature *sig)
{
*this = *sig;
}
//! Overloaded arrow operator for backwards compatible shared_ptr usage.
IOSignature* operator->(void)
{
return this;
};
//! Overloaded arrow operator for backwards compatible shared_ptr usage.
const IOSignature* operator->(void) const
{
return this;
};
const unsigned &at(const unsigned index) const
{
if (this->empty())
{
throw std::invalid_argument("io signature fail: indexing empty vector");
}
if (this->size() > index)
{
return std::vector<unsigned>::at(index);
}
return this->back();
}
const unsigned &operator[](const unsigned index) const
{
return this->at(index);
}
void set_min_streams(const int val)
{
_min_streams = val;
}
void set_max_streams(const int val)
{
_max_streams = val;
}
int min_streams(void) const
{
return _min_streams;
}
int max_streams(void) const
{
return _max_streams;
}
int sizeof_stream_item(const unsigned index) const
{
return this->at(index);
}
const std::vector<unsigned> &sizeof_stream_items(void) const
{
return *this;
}
int _min_streams;
int _max_streams;
};
} //namespace gras
#endif /*INCLUDED_GRAS_IO_SIGNATURE_HPP*/
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