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.

2 files changed, 16 insertions, 0 deletions

diff --git a/src/basic/string-util.c b/src/basic/string-util.c
index b7b8c97bc0..1f95a9abba 100644
--- a/src/basic/string-util.c
+++ b/src/basic/string-util.c
@@ -363,6 +363,21 @@ 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;
 
diff --git a/src/basic/string-util.h b/src/basic/string-util.h
index 6374e11119..8ea18f45aa 100644
--- a/src/basic/string-util.h
+++ b/src/basic/string-util.h
@@ -135,6 +135,7 @@ char *ascii_strlower(char *s);
 char *ascii_strlower_n(char *s, size_t n);
 
 int ascii_strcasecmp_n(const char *a, const char *b, size_t n);
+int ascii_strcasecmp_nn(const char *a, size_t n, const char *b, size_t m);
 
 bool chars_intersect(const char *a, const char *b) _pure_;