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Turn latitude and longitude into integer micro-degree values

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This actually makes us internally use 'micro-degrees' for latitude and
longitude, and we never turn them into floating point either at parse
time or save time.

That said, the Uemis downloader internally does still use atof() when
converting things, which is likely a bug (locale issues and all that),
but I'll ask Dirk to check it out.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Linus Torvalds 2012-12-05 09:59:52 -08:00 • committed by Dirk Hohndel
parent 708df33539
commit 5e5e3460ac
7 changed files with 72 additions and 19 deletions
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13
save-xml.c
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@ -4,7 +4,6 @@
#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <math.h>
#include "dive.h"
@ -183,9 +182,9 @@ static void save_salinity(FILE *f, struct dive *dive)
* on a great circle (ie longitude at equator). And micro-degrees
* is also enough to fit in a fixed-point 32-bit integer.
*/
static int format_degrees(char *buffer, double value)
static int format_degrees(char *buffer, degrees_t value)
{
int udeg = round(value * 1000000.0);
int udeg = value.udeg;
const char *sign = "";
if (udeg < 0) {
@ -196,7 +195,7 @@ static int format_degrees(char *buffer, double value)
sign, udeg / 1000000, udeg % 1000000);
}
static int format_location(char *buffer, double latitude, double longitude)
static int format_location(char *buffer, degrees_t latitude, degrees_t longitude)
{
int len = sprintf(buffer, "gps='");
@ -212,8 +211,8 @@ static void show_location(FILE *f, struct dive *dive)
{
char buffer[80];
const char *prefix = " <location>";
double latitude = dive->latitude;
double longitude = dive->longitude;
degrees_t latitude = dive->latitude;
degrees_t longitude = dive->longitude;
/*
* Ok, theoretically I guess you could dive at
@ -221,7 +220,7 @@ static void show_location(FILE *f, struct dive *dive)
* if you do, just fudge it a bit, and say that
* you dove a few meters away.
*/
if (latitude || longitude) {
if (latitude.udeg || longitude.udeg) {
int len = sprintf(buffer, " <location ");
len += format_location(buffer+len, latitude, longitude);