diff --git a/src/tools.c b/src/tools.c
index 9e971bb..53b950c 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -653,4 +653,33 @@ int array_contains(char **array, const size_t array_len, const char *s)
 }
 
 
+
+int array_contains0(char **array, const char *s)
+{
+    int result = 0;
+    if (array != NULL) {
+        for (size_t i = 0; array[i] != NULL; ++i) {
+            if (strcasecmp(array[i], s) == 0) {
+                result = 1;
+                break;
+            }
+        }
+    }
+    return result;
+}
+
+
+
+size_t array_count0(char **array)
+{
+    size_t num_elems = 0;
+    if (array != NULL) {
+        while (array[num_elems] != NULL) {
+            ++num_elems;
+        }
+    }
+    return num_elems;
+}
+
+
 /*EOF*/                                                  /* vim: set sw=4: */
diff --git a/src/tools.h b/src/tools.h
index eba6493..b65d1a0 100644
--- a/src/tools.h
+++ b/src/tools.h
@@ -82,6 +82,20 @@ void analyze_line_ascii(line_t *line);
 
 int array_contains(char **array, const size_t array_len, const char *s);
 
+/**
+ * Determine if the given `array` contains the given string (case-insensitive!).
+ * @param array an array of strings to search
+ * @param s the string to search
+ * @returns != 0 if found, 0 if not found
+ */
+int array_contains0(char **array, const char *s);
+
+/**
+ * Count the number of elements in a zero-terminated array.
+ * @param array a zero-terminated array of strings (can be NULL)
+ * @returns the number of elements, excluding the zero terminator
+ */
+size_t array_count0(char **array);
 
 #endif