1 files changed, 37 insertions, 0 deletions

diff --git a/libbb/compare_string_array.c b/libbb/compare_string_array.c
new file mode 100644
index 000000000..d15578ca3
--- /dev/null
+++ b/libbb/compare_string_array.c
@@ -0,0 +1,37 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ */
+
+#include "libbb.h"
+
+/* returns the array index of the string */
+/* (index of first match is returned, or -1) */
+int index_in_str_array(const char * const string_array[], const char *key)
+{
+        int i;
+
+        for (i = 0; string_array[i] != 0; i++) {
+                if (strcmp(string_array[i], key) == 0) {
+                        return i;
+                }
+        }
+        return -1;
+}
+
+/* returns the array index of the string, even if it matches only a beginning */
+/* (index of first match is returned, or -1) */
+int index_in_substr_array(const char * const string_array[], const char *key)
+{
+        int i;
+        int len = strlen(key);
+        if (!len)
+                return -1;
+
+        for (i = 0; string_array[i] != 0; i++) {
+                if (strncmp(string_array[i], key, len) == 0) {
+                        return i;
+                }
+        }
+        return -1;
+}