2 files changed, 53 insertions, 0 deletions
diff --git a/include/user_input.h b/include/user_input.h
new file mode 100644
index 0000000..4e051ed
--- /dev/null
+++ b/include/user_input.h
@@ -0,0 +1,7 @@
+#ifndef SPM_USER_INPUT_H
+#define SPM_USER_INPUT_H
+
+int spm_user_yesno(int answer, int empty_input_is_yes);
+void spm_user_yesno_test();
+
+#endif //SPM_USER_INPUT_H
diff --git a/src/user_input.c b/src/user_input.c
new file mode 100644
index 0000000..061fb2e
--- /dev/null
+++ b/src/user_input.c
@@ -0,0 +1,46 @@
+#include "spm.h"
+
+/**
+ * Basic case-insensitive interactive choice function
+ * @param answer
+ * @param answer_default
+ * @return
+ */
+int spm_user_yesno(int answer, int empty_input_is_yes) {
+    int result = 0;
+    answer = tolower(answer);
+
+    if (answer == 'y') {
+        result = 1;
+    } else if (answer == 'n') {
+        result = 0;
+    } else {
+        if (empty_input_is_yes) {
+            result = 1;
+        } else {
+            result = -1;
+        }
+    }
+
+    return result;
+}
+
+void spm_user_yesno_test() {
+    int choice;
+    int status;
+    while ((choice = getchar())) {
+        status = spm_user_yesno(choice, 1);
+        if (status == -1) {
+            puts("Please answer Y or N");
+            continue;
+        }
+        else if (status == 0) {
+            puts("You answered no");
+            break;
+        }
+        else if (status == 1) {
+            puts("You answered yes");
+            break;
+        }
+    }
+}