lib: introduce upper case hex ascii helpers

To be able to use the hex ascii functions in case sensitive environments
the array hex_asc_upper[] and the needed functions for hex_byte_pack_upper()
are introduced.

Signed-off-by: Andre Naujoks <nautsch2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 482ad2d84a32dae333c74cccb2d1394b247d5ae8..672ddc4de4af0511b20a4d269bcae1c517c3d5c4 100644 (file)
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -439,6 +439,17 @@ static inline char *hex_byte_pack(char *buf, u8 byte)
        return buf;
 }
 
+extern const char hex_asc_upper[];
+#define hex_asc_upper_lo(x)    hex_asc_upper[((x) & 0x0f)]
+#define hex_asc_upper_hi(x)    hex_asc_upper[((x) & 0xf0) >> 4]
+
+static inline char *hex_byte_pack_upper(char *buf, u8 byte)
+{
+       *buf++ = hex_asc_upper_hi(byte);
+       *buf++ = hex_asc_upper_lo(byte);
+       return buf;
+}
+
 static inline char * __deprecated pack_hex_byte(char *buf, u8 byte)
 {
        return hex_byte_pack(buf, byte);

diff --git a/lib/hexdump.c b/lib/hexdump.c
index 3f0494c9d57aaf24cbbea90231e010d1d06f3e04..8499c810909a58ae100b7db96a01ea74b5c14948 100644 (file)
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -14,6 +14,8 @@
 
 const char hex_asc[] = "0123456789abcdef";
 EXPORT_SYMBOL(hex_asc);
+const char hex_asc_upper[] = "0123456789ABCDEF";
+EXPORT_SYMBOL(hex_asc_upper);
 
 /**
  * hex_to_bin - convert a hex digit to its real value