From: Lennart Poettering <lennart@poettering.net>
Date: Wed, 13 Jan 2016 18:45:05 +0000 (+0100)
Subject: basic: add ascii_strcasecmp_nn() call
X-Git-Tag: v229.1~1^2~56
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=3b22b89bce6c5185e1db0a28390a0e6df138a27b;hp=7c1b422919819e9e7af4652b52d5f122a090ce53;p=elogind.git

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.
---

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;
 
diff --git a/src/basic/string-util.h b/src/basic/string-util.h
index 48cdc736f..7ed649ae6 100644
--- a/src/basic/string-util.h
+++ b/src/basic/string-util.h
@@ -133,6 +133,7 @@ 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_;