Add scan_gas to mirror format_gas

2 files changed, 25 insertions, 0 deletions

diff --git a/output.c b/output.c
index 3d8a597..589c811 100644
--- a/output.c
+++ b/output.c
@@ -2,6 +2,7 @@
 
 #include <math.h>
 #include <stdio.h>
+#include <string.h>
 
 #include "output.h"
 
@@ -31,6 +32,28 @@ void format_gas(char *buf, const size_t buflen, const gas_t *gas)
         snprintf(buf, buflen, "%i/%i", gas_o2(gas), gas_he(gas));
 }
 
+void scan_gas(gas_t *gas, char *str)
+{
+    int o2 = 0;
+    int he = 0;
+
+    if (!strcmp(str, "Air")) {
+        *gas = gas_new(21, 0, MOD_AUTO);
+        return;
+    } else if (!strcmp(str, "Oxygen")) {
+        *gas = gas_new(100, 0, MOD_AUTO);
+        return;
+    } else if (!strncmp(str, "EAN", strlen("EAN"))) {
+        sscanf(str, "EAN%i", &o2);
+    } else if (!strncmp(str, "Nitrox", strlen("Nitrox"))) {
+        sscanf(str, "Nitrox %i", &o2);
+    } else {
+        sscanf(str, "%i/%i", &o2, &he);
+    }
+
+    *gas = gas_new(o2, he, MOD_AUTO);
+}
+
 void print_planhead()
 {
     wprintf(L"DIVE PLAN\n\n");
diff --git a/output.h b/output.h
index 0cedcc7..829e23a 100644
--- a/output.h
+++ b/output.h
@@ -16,4 +16,6 @@ void print_planhead();
 void print_planline(const wchar_t sign, const double depth, const double time, const double runtime, const gas_t *gas);
 void print_planfoot(const decostate_t *ds);
 
+void scan_gas(gas_t *gas, char *str);
+
 #endif /* end of include guard: OUTPUT_H */