libfprint/examples/utilities.c

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/*
* Utilities for example programs
*
* Copyright (C) 2019 Marco Trevisan <marco.trevisan@canonical.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <libfprint/fprint.h>
#include <stdio.h>
#include "utilities.h"
FpDevice *
discover_device (GPtrArray * devices)
{
FpDevice *dev;
int i;
if (!devices->len)
return NULL;
if (devices->len == 1)
{
i = 0;
}
else
{
g_print ("Multiple devices found, choose one\n");
for (i = 0; i < devices->len; ++i)
{
dev = g_ptr_array_index (devices, i);
g_print ("[%d] %s (%s) - driver %s\n", i,
fp_device_get_device_id (dev), fp_device_get_name (dev),
fp_device_get_driver (dev));
}
g_print ("> ");
if (!scanf ("%d%*c", &i))
return NULL;
if (i < 0 || i >= devices->len)
return NULL;
}
dev = g_ptr_array_index (devices, i);
g_print ("Selected device %s (%s) claimed by %s driver\n",
fp_device_get_device_id (dev), fp_device_get_name (dev),
fp_device_get_driver (dev));
return dev;
}
const char *
finger_to_string (FpFinger finger)
{
switch (finger)
{
case FP_FINGER_LEFT_THUMB:
return "left thumb";
case FP_FINGER_LEFT_INDEX:
return "left index";
case FP_FINGER_LEFT_MIDDLE:
return "left middle";
case FP_FINGER_LEFT_RING:
return "left ring";
case FP_FINGER_LEFT_LITTLE:
return "left little";
case FP_FINGER_RIGHT_THUMB:
return "right thumb";
case FP_FINGER_RIGHT_INDEX:
return "right index";
case FP_FINGER_RIGHT_MIDDLE:
return "right middle";
case FP_FINGER_RIGHT_RING:
return "right ring";
case FP_FINGER_RIGHT_LITTLE:
return "right little";
default:
return "unknown";
}
}
FpFinger
finger_chooser (void)
{
int i;
const FpFinger all_fingers[] = {
FP_FINGER_LEFT_THUMB,
FP_FINGER_LEFT_INDEX,
FP_FINGER_LEFT_MIDDLE,
FP_FINGER_LEFT_RING,
FP_FINGER_LEFT_LITTLE,
FP_FINGER_RIGHT_THUMB,
FP_FINGER_RIGHT_INDEX,
FP_FINGER_RIGHT_MIDDLE,
FP_FINGER_RIGHT_RING,
FP_FINGER_RIGHT_LITTLE,
};
for (i = all_fingers[0]; i <= G_N_ELEMENTS (all_fingers); ++i)
g_print (" [%d] %s\n", (i - all_fingers[0]), finger_to_string (i));
g_print ("> ");
if (!scanf ("%d%*c", &i))
return FP_FINGER_UNKNOWN;
if (i < 0 || i >= G_N_ELEMENTS (all_fingers))
return FP_FINGER_UNKNOWN;
return all_fingers[i];
}