Remove is_air() and convert its users to gasmix

Also make gasname() and get_gas_string() global functions (which allows us
to delete code elsewhere).

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 18 insertions, 0 deletions

diff --git a/equipment.c b/equipment.c
index a67df68a4..1dd3c3f9d 100644
--- a/equipment.c
+++ b/equipment.c
@@ -97,6 +97,24 @@ bool cylinder_is_used(struct dive *d, cylinder_t *cyl)
 	return false;
 }
 
+void get_gas_string(const struct gasmix *gasmix, char *text, int len)
+{
+	if (gasmix_is_air(gasmix))
+		snprintf(text, len, "%s", translate("gettextFromC", "air"));
+	else if (get_he(gasmix) == 0)
+		snprintf(text, len, translate("gettextFromC", "EAN%d"), (get_o2(gasmix) + 5) / 10);
+	else
+		snprintf(text, len, "(%d/%d)", (get_o2(gasmix) + 5) / 10, (get_he(gasmix) + 5) / 10);
+}
+
+/* Returns a static char buffer - only good for immediate use by printf etc */
+const char *gasname(const struct gasmix *gasmix)
+{
+	static char gas[64];
+	get_gas_string(gasmix, gas, sizeof(gas));
+	return gas;
+}
+
 bool weightsystem_none(void *_data)
 {
 	weightsystem_t *ws = _data;