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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 namespace load_csv {
  19         string[*] parse_data(file f) {
  20                 while (!File::end(f)) {
  21                         string l = File::fgets(f);
  22                         if (l[0] == '#')
  23                                 continue;
  24                         return String::parse_csv(l);
  25                 }
  26                 return (string[0]) {};
  27         }
  28
  29         public typedef struct {
  30                 bool    done;
  31                 real    time;
  32                 real    height;
  33                 real    acceleration;
  34                 real    pressure;
  35         } record_t;
  36
  37         public record_t parse_record(file f, real accel_scale) {
  38                 string[*] data = parse_data(f);
  39                 if (dim(data) == 0)
  40                         return (record_t) { .done = true };
  41                 int time_off = 4;
  42                 int height_off = 11;
  43                 int accel_off = 8;
  44                 int pres_off = 9;
  45                 switch (string_to_integer(data[0])) {
  46                 case 2:
  47                         time_off = 4;
  48                         accel_off = 9;
  49                         pres_off = 10;
  50                         height_off = 12;
  51                         break;
  52                 case 5:
  53                         time_off = 4;
  54                         accel_off = 10;
  55                         pres_off = 11;
  56                         height_off = 13;
  57                         break;
  58                 }
  59                 return (record_t) {
  60                         .done = false,
  61                         .time = string_to_real(data[time_off]),
  62                         .height = imprecise(string_to_real(data[height_off])),
  63                         .acceleration = imprecise(string_to_real(data[accel_off]) * accel_scale),
  64                         .pressure = imprecise(string_to_real(data[pres_off]))
  65                 };
  66         }
  67
  68         public void dump(file f) {
  69                 for (;;) {
  70                         record_t        r = parse_record(f, 1);
  71                         if (r.done)
  72                                 break;
  73                         printf ("%f %f %f\n", r.time, r.height, r.acceleration);
  74                 }
  75         }
  76 }