Split up preference data structure definition into 'pref.h'

.. and rename the badly named 'output_units/input_units' variables.

We used to have this confusing thing where we had two different units
(input vs output) that *look* like they are mirror images, but in fact
"output_units" was the user units, and "input_units" are the XML parsing
units.

So this renames them to be clearer.  "output_units" is now just "units"
(it's the units a user would ever see), and "input_units" is now
"xml_parsing_units" and set by the XML file parsers to reflect the units
of the parsed file.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 54 insertions, 0 deletions

diff --git a/pref.h b/pref.h
new file mode 100644
index 000000000..ddc2eaff0
--- /dev/null
+++ b/pref.h
@@ -0,0 +1,54 @@
+#ifndef PREF_H
+#define PREF_H
+
+typedef struct {
+	gboolean cylinder;
+	gboolean temperature;
+	gboolean totalweight;
+	gboolean suit;
+	gboolean nitrox;
+	gboolean sac;
+	gboolean otu;
+	gboolean maxcns;
+} visible_cols_t;
+
+typedef struct {
+	gboolean po2;
+	gboolean pn2;
+	gboolean phe;
+	double po2_threshold;
+	double pn2_threshold;
+	double phe_threshold;
+} partial_pressure_graphs_t;
+
+struct preferences {
+	struct units units;
+	visible_cols_t visible_cols;
+	partial_pressure_graphs_t pp_graphs;
+	gboolean profile_red_ceiling;
+	gboolean profile_calc_ceiling;
+	gboolean calc_ceiling_3m_incr;
+	double gflow;
+	double gfhigh;
+};
+
+extern struct preferences prefs, default_prefs;
+
+#define PP_GRAPHS_ENABLED (prefs.pp_graphs.po2 || prefs.pp_graphs.pn2 || prefs.pp_graphs.phe)
+
+typedef enum {
+	PREF_BOOL,
+	PREF_STRING
+} pref_type_t;
+
+#define BOOL_TO_PTR(_cond) ((_cond) ? (void *)1 : NULL)
+#define PTR_TO_BOOL(_ptr) ((_ptr) != NULL)
+
+extern void subsurface_open_conf(void);
+extern void subsurface_set_conf(char *name, pref_type_t type, const void *value);
+extern void subsurface_unset_conf(char *name);
+extern const void *subsurface_get_conf(char *name, pref_type_t type);
+extern void subsurface_flush_conf(void);
+extern void subsurface_close_conf(void);
+
+#endif /* PREF_H */