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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
* libiio - Library for interfacing industrial I/O (IIO) devices
*
* Copyright (C) 2020 Analog Devices, Inc.
* Author: Cristian Iacob <cristian.iacob@analog.com>
*/
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
namespace iio
{
/// <summary> <see cref="iio.ScanContext"/> class:
/// Class for getting information about the available contexts.</summary>
public class ScanContext
{
private IntPtr scan_block;
[DllImport("libiio.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr iio_create_scan_block([In] string backend, uint flags);
[DllImport("libiio.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr iio_scan_block_get_info(IntPtr blk, uint index);
[DllImport("libiio.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr iio_context_info_get_description(IntPtr info);
[DllImport("libiio.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr iio_context_info_get_uri(IntPtr info);
[DllImport("libiio.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern long iio_scan_block_scan(IntPtr blk);
/// <summary>
/// Gets the uri and the description of all available contexts with USB backend.
/// </summary>
/// <returns>a <see cref="Dictionary{String, String}"/> containing the context's uri as key and its description as value.</returns>
public Dictionary<string, string> get_usb_backend_contexts()
{
this.scan_block = iio_create_scan_block("usb", 0);
return get_contexts_info();
}
// <summary>
/// Gets the uri and the description of all available contexts with local backend.
/// </summary>
/// <returns>a <see cref="Dictionary{String, String}"/> containing the context's uri as key and its description as value.</returns>
public Dictionary<string, string> get_local_backend_contexts()
{
this.scan_block = iio_create_scan_block("local", 0);
return get_contexts_info();
}
// <summary>
/// Gets the uri and the description of all available contexts from dns_sd backend.
/// </summary>
/// <returns>a <see cref="Dictionary{String, String}"/> containing the context's uri as key and its description as value.</returns>
public Dictionary<string, string> get_dns_sd_backend_contexts()
{
this.scan_block = iio_create_scan_block("ip", 0);
return get_contexts_info();
}
private Dictionary<string, string> get_contexts_info()
{
uint contexts_count = (uint)iio_scan_block_scan(this.scan_block);
Dictionary<string, string> contexts_info = new Dictionary<string, string>();
for (uint i = 0; i < contexts_count; i++)
{
IntPtr info = iio_scan_block_get_info(this.scan_block, i);
string uri = Marshal.PtrToStringAnsi(iio_context_info_get_uri(info));
string description = Marshal.PtrToStringAnsi(iio_context_info_get_description(info));
contexts_info[uri] = description;
}
return contexts_info;
}
}
}
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