xen: Add new string function

Add strcasecmp. The code is copied from Linux.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/xen/common/string.c b/xen/common/string.c
index db9d9d5199..9a5a4ba5e8 100644
--- a/xen/common/string.c
+++ b/xen/common/string.c
@@ -41,6 +41,21 @@ int strnicmp(const char *s1, const char *s2, size_t len)
 }
 #endif
 
+#ifndef __HAVE_ARCH_STRCASECMP
+int strcasecmp(const char *s1, const char *s2)
+{
+    int c1, c2;
+
+    do
+    {
+        c1 = tolower(*s1++);
+        c2 = tolower(*s2++);
+    } while ( c1 == c2 && c1 != 0 );
+
+    return c1 - c2;
+}
+#endif
+
 #ifndef __HAVE_ARCH_STRLCPY
 /**
  * strlcpy - Copy a %NUL terminated string into a sized buffer