[eog] EogMetadataDetails: Improve fractional GPS coordinates support

[Felix Riemann <friemann src gnome org>]

commit 1b0fb6b3e06bd2cc8e8055c0847d75311685f7c9
Author: Felix Riemann <friemann gnome org>
Date:   Fri Feb 28 22:52:56 2014 +0100

    EogMetadataDetails: Improve fractional GPS coordinates support
    
    Increase displayed coordinate resolution for Exif GPS coordinates that
    use fractional degrees for minutes or fractional minutes for seconds.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=725416

 src/eog-metadata-details.c |   31 +++++++++++++++++++++++++------
 1 files changed, 25 insertions(+), 6 deletions(-)
---
diff --git a/src/eog-metadata-details.c b/src/eog-metadata-details.c
index e9c619f..cc51e5f 100644
--- a/src/eog-metadata-details.c
+++ b/src/eog-metadata-details.c
@@ -39,6 +39,7 @@
 #include <gtk/gtk.h>
 
 #include <string.h>
+#include <math.h>
 
 typedef enum {
        EXIF_CATEGORY_CAMERA,
@@ -372,7 +373,7 @@ eog_exif_entry_get_value (ExifEntry    *e,
                {
                        gsize rational_size;
                        ExifRational r;
-                       gfloat h = 0., m = 0.;
+                       gfloat h = 0., m = 0., s = 0.;
 
 
                        rational_size = exif_format_get_size (EXIF_FORMAT_RATIONAL);
@@ -385,15 +386,33 @@ eog_exif_entry_get_value (ExifEntry    *e,
                                h = (gfloat)r.numerator / r.denominator;
 
                        r = exif_get_rational (e->data + rational_size, bo);
-                       if (r.denominator != 0)
-                               m = (gfloat)r.numerator / (gfloat)r.denominator;
+                       if (r.denominator != 0) {
+                               if (r.numerator != 0) {
+                                       m = (gfloat)r.numerator /
+                                           (gfloat)r.denominator;
+                               } else {
+                                       double integ;
+
+                                       m = (gfloat)(modf (h, &integ) * 60.0);
+                                       h = (gfloat) integ;
+                               }
+                       }
 
                        r = exif_get_rational (e->data + (2 * rational_size),
                                               bo);
-                       if (r.numerator != 0 && r.denominator != 0) {
-                               gfloat s;
+                       if (r.denominator != 0) {
+                               if (r.numerator != 0) {
+                                       s = (gfloat)r.numerator /
+                                           (gfloat)r.denominator;
+                               } else {
+                                       double integ;
+
+                                       s = (gfloat)(modf (m, &integ) * 60.0);
+                                       m = (gfloat) integ;
+                               }
+                       }
 
-                               s = (gfloat)r.numerator / (gfloat)r.denominator;
+                       if (s != 0.0) {
                                g_snprintf (buf, n_buf,
                                            "%.0f° %.0f' %.2f\"",
                                            h, m, s);