git.gag.com Git - fw/altos/blob - src/kalman/load_csv.5c

   1 /*
   2  * Copyright © 2011 Keith Packard <keithp@keithp.com>
   3  *
   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.
   8  *
   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.
  13  *
  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.
  17  */
  18
  19 namespace load_csv {
  20         string[*] parse_data(file f) {
  21                 while (!File::end(f)) {
  22                         string l = File::fgets(f);
  23                         if (l[0] == '#')
  24                                 continue;
  25                         return String::parse_csv(l);
  26                 }
  27                 return (string[0]) {};
  28         }
  29
  30         public typedef struct {
  31                 bool    done;
  32                 real    time;
  33                 real    height;
  34                 real    acceleration;
  35                 real    pressure;
  36         } record_t;
  37
  38         public record_t parse_record(file f, real accel_scale) {
  39                 string[*] data = parse_data(f);
  40                 if (dim(data) == 0)
  41                         return (record_t) { .done = true };
  42                 int time_off = 4;
  43                 int height_off = 11;
  44                 int accel_off = 8;
  45                 int pres_off = 9;
  46                 switch (string_to_integer(data[0])) {
  47                 case 2:
  48                         time_off = 4;
  49                         accel_off = 9;
  50                         pres_off = 10;
  51                         height_off = 12;
  52                         break;
  53                 case 5:
  54                         time_off = 4;
  55                         accel_off = 10;
  56                         pres_off = 11;
  57                         height_off = 13;
  58                         break;
  59                 }
  60                 return (record_t) {
  61                         .done = false,
  62                         .time = string_to_real(data[time_off]),
  63                         .height = imprecise(string_to_real(data[height_off])),
  64                         .acceleration = imprecise(string_to_real(data[accel_off]) * accel_scale),
  65                         .pressure = imprecise(string_to_real(data[pres_off]))
  66                 };
  67         }
  68
  69         public void dump(file f) {
  70                 for (;;) {
  71                         record_t        r = parse_record(f, 1);
  72                         if (r.done)
  73                                 break;
  74                         printf ("%f %f %f\n", r.time, r.height, r.acceleration);
  75                 }
  76         }
  77 }