[RFC 06/24] xen: Add new string functions

[Julien Grall <julien.grall@linaro.org>]

Add kbasename and strcasecmp. The code is copied from Linux.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
---
 xen/common/string.c      |   15 +++++++++++++++
 xen/include/xen/string.h |   14 ++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/xen/common/string.c b/xen/common/string.c
index db9d9d5..9a5a4ba 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
diff --git a/xen/include/xen/string.h b/xen/include/xen/string.h
index f26b994..9b7511e 100644
--- a/xen/include/xen/string.h
+++ b/xen/include/xen/string.h
@@ -43,6 +43,9 @@ extern int strncmp(const char *,const char *,__kernel_size_t);
 #ifndef __HAVE_ARCH_STRNICMP
 extern int strnicmp(const char *, const char *, __kernel_size_t);
 #endif
+#ifndef __HAVE_ARCH_STRCASECMP
+extern int strcasecmp(const char *, const char *);
+#endif
 #ifndef __HAVE_ARCH_STRCHR
 extern char * strchr(const char *,int);
 #endif
@@ -94,4 +97,15 @@ extern void * memchr(const void *,int,__kernel_size_t);
     (strlcat(d, s, sizeof(d)) >= sizeof(d));    \
 })
 
+/**
+ * kbasename - return the last part of a pathname.
+ *
+ * @path: path to extract the filename from.
+ */
+static inline const char *kbasename(const char *path)
+{
+    const char *tail = strrchr(path, '/');
+    return tail ? tail + 1 : path;
+}
+
 #endif /* _LINUX_STRING_H_ */
-- 
1.7.10.4