src/coords.h

   1 /*
   2 coords.h
   3 borrowed from:
   4 http://acme.com/software/coords/
   5 I (Evan Battaglia <viking@greentorch.org> have only made some small changes such as
   6 renaming functions and defining LatLon and UTM structs.
   7 */
   8 /* coords.h - include file for coords routines
   9 **
  10 ** Copyright © 2001 by Jef Poskanzer <jef@acme.com>.
  11 ** All rights reserved.
  12 **
  13 ** Redistribution and use in source and binary forms, with or without
  14 ** modification, are permitted provided that the following conditions
  15 ** are met:
  16 ** 1. Redistributions of source code must retain the above copyright
  17 **    notice, this list of conditions and the following disclaimer.
  18 ** 2. Redistributions in binary form must reproduce the above copyright
  19 **    notice, this list of conditions and the following disclaimer in the
  20 **    documentation and/or other materials provided with the distribution.
  21 **
  22 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  23 ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24 ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25 ** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  26 ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27 ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28 ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29 ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30 ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31 ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32 ** SUCH DAMAGE.
  33 */
  34
  35 #ifndef _VIKING_COORDS_H
  36 #define _VIKING_COORDS_H
  37
  38 #include <glib.h>
  39
  40 struct UTM {
  41   gdouble northing;
  42   gdouble easting;
  43   gchar zone;
  44   gchar letter;
  45 };
  46
  47 struct LatLon {
  48   gdouble lat;
  49   gdouble lon;
  50 };
  51
  52 int a_coords_utm_equal( const struct UTM *utm1, const struct UTM *utm2 );
  53 void a_coords_latlon_to_utm ( const struct LatLon *latlon, struct UTM *utm );
  54 void a_coords_utm_to_latlon ( const struct UTM *utm, struct LatLon *latlon );
  55 double a_coords_utm_diff( const struct UTM *utm1, const struct UTM *utm2 );
  56 double a_coords_latlon_diff ( const struct LatLon *ll1, const struct LatLon *ll2 );
  57
  58 /**
  59  * Convert a double to a string WITHOUT LOCALE.
  60  *
  61  * Following GPX specifications, decimal values are xsd:decimal
  62  * So, they must use the period separator, not the localized one.
  63  *
  64  * The returned value must be freed by g_free.
  65  */
  66 char *a_coords_dtostr ( double d );
  67
  68
  69
  70 #endif