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authorHarvey Harrison <harvey.harrison@gmail.com>2008-05-14 16:05:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-14 19:11:14 -0700
commit3fc957721d18c93662f7d4dab455b80f53dd2641 (patch)
tree9bdbabf3cb3678edcd0e0e4beb5deaa5c1b17bcd /include
parent122a881c776b7c155bf3f379928cc27aab435288 (diff)
lib: create common ascii hex array
Add a common hex array in hexdump.c so everyone can use it. Add a common hi/lo helper to avoid the shifting masking that is done to get the upper and lower nibbles of a byte value. Pull the pack_hex_byte helper from kgdb as it is opencoded many places in the tree that will be consolidated. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/kernel.h12
1 files changed, 11 insertions, 1 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4d46e299afb..792bf0aa779 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -276,7 +276,17 @@ extern void print_hex_dump(const char *level, const char *prefix_str,
const void *buf, size_t len, bool ascii);
extern void print_hex_dump_bytes(const char *prefix_str, int prefix_type,
const void *buf, size_t len);
-#define hex_asc(x) "0123456789abcdef"[x]
+
+extern const char hex_asc[];
+#define hex_asc_lo(x) hex_asc[((x) & 0x0f)]
+#define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4]
+
+static inline char *pack_hex_byte(char *buf, u8 byte)
+{
+ *buf++ = hex_asc_hi(byte);
+ *buf++ = hex_asc_lo(byte);
+ return buf;
+}
#define pr_emerg(fmt, arg...) \
printk(KERN_EMERG fmt, ##arg)