These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / drivers / firmware / efi / libstub / string.c

diff --git a/kernel/drivers/firmware/efi/libstub/string.c b/kernel/drivers/firmware/efi/libstub/string.c
new file mode 100644 (file)
index 0000000..09d5a08
--- /dev/null
+++ b/kernel/drivers/firmware/efi/libstub/string.c
@@ -0,0 +1,57 @@
+/*
+ * Taken from:
+ *  linux/lib/string.c
+ *
+ *  Copyright (C) 1991, 1992  Linus Torvalds
+ */
+
+#include <linux/types.h>
+#include <linux/string.h>
+
+#ifndef __HAVE_ARCH_STRSTR
+/**
+ * strstr - Find the first substring in a %NUL terminated string
+ * @s1: The string to be searched
+ * @s2: The string to search for
+ */
+char *strstr(const char *s1, const char *s2)
+{
+       size_t l1, l2;
+
+       l2 = strlen(s2);
+       if (!l2)
+               return (char *)s1;
+       l1 = strlen(s1);
+       while (l1 >= l2) {
+               l1--;
+               if (!memcmp(s1, s2, l2))
+                       return (char *)s1;
+               s1++;
+       }
+       return NULL;
+}
+#endif
+
+#ifndef __HAVE_ARCH_STRNCMP
+/**
+ * strncmp - Compare two length-limited strings
+ * @cs: One string
+ * @ct: Another string
+ * @count: The maximum number of bytes to compare
+ */
+int strncmp(const char *cs, const char *ct, size_t count)
+{
+       unsigned char c1, c2;
+
+       while (count) {
+               c1 = *cs++;
+               c2 = *ct++;
+               if (c1 != c2)
+                       return c1 < c2 ? -1 : 1;
+               if (!c1)
+                       break;
+               count--;
+       }
+       return 0;
+}
+#endif