2 * Copyright © 2010 Keith Packard <keithp@keithp.com>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20 #define AO_CONVERT_TEST
21 #define AO_NEED_ALTITUDE_TO_PRES 1
23 #include "ao_convert.c"
27 static inline int i_abs(int i) { return i < 0 ? -i : i; }
29 int main (int argc, char **argv)
32 int16_t p_to_a, p_to_a_to_p;
33 int16_t a_to_p, a_to_p_to_a;
34 int max_p_error = 0, max_p_error_p = -1;
35 int max_a_error = 0, max_a_error_a = -1;
40 for (i = 0; i < 32767 + STEP; i += STEP) {
43 p_to_a = ao_pres_to_altitude(i);
44 p_to_a_to_p = ao_altitude_to_pres(p_to_a);
45 p_error = i_abs(p_to_a_to_p - i);
46 if (p_error > max_p_error) {
47 max_p_error = p_error;
50 // printf ("pres %d alt %d pres %d\n",
51 // i, p_to_a, p_to_a_to_p);
53 for (i = -1578; i < 15835 + STEP; i += STEP) {
56 a_to_p = ao_altitude_to_pres(i);
57 a_to_p_to_a = ao_pres_to_altitude(a_to_p);
58 a_error = i_abs(a_to_p_to_a - i);
59 if (a_error > max_a_error) {
60 max_a_error = a_error;
63 // printf ("alt %d pres %d alt %d\n",
64 // i, a_to_p, a_to_p_to_a);
66 if (max_p_error > 2) {
67 printf ("max p error %d at %d\n", max_p_error,
71 if (max_a_error > 1) {
72 printf ("max a error %d at %d\n", max_a_error,