basic: add ascii_strcasecmp_nn() call

In contrast to ascii_strcasecmp_nn() it takes two character buffers with their individual length. It will then compare
the buffers up the smaller size of the two buffers, and finally the length themselves.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/basic/string-util.c b/src/basic/string-util.c
index dfcb29235..6f4593e6b 100644
--- a/src/basic/string-util.c
+++ b/src/basic/string-util.c
@@ -356,6 +356,21 @@ int ascii_strcasecmp_n(const char *a, const char *b, size_t n) {
         return 0;
 }
 
+int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m) {
+        int r;
+
+        r = ascii_strcasecmp_n(a, b, MIN(n, m));
+        if (r != 0)
+                return r;
+
+        if (n < m)
+                return -1;
+        else if (n > m)
+                return 1;
+        else
+                return 0;
+}
+
 bool chars_intersect(const char *a, const char *b) {
         const char *p;