Similar to the kgdb_hex2mem() code, hex2bin converts a string
to binary using the hex_to_bin() library call.
Changelog:
- Replace parameter names with src/dst (based on David Howell's comment)
- Add 'const' where needed (based on David Howell's comment)
- Replace int with size_t (based on David Howell's comment)
Signed-off-by: Mimi Zohar <zohar@xxxxxxxxxx>
Acked-by: Serge E. Hallyn <serge@xxxxxxxxxx>
Acked-by: David Howells <dhowells@xxxxxxxxxx>
---
include/linux/kernel.h | 1 +
lib/hexdump.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 3f648d2..fbca217 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -419,6 +419,7 @@ static inline char *pack_hex_byte(char *buf, u8 byte)
}
extern int hex_to_bin(char ch);
+extern void hex2bin(u8 *dst, const char *src, size_t count);
#ifndef pr_fmt
#define pr_fmt(fmt) fmt
diff --git a/lib/hexdump.c b/lib/hexdump.c
index 5d7a480..b66b2bd 100644
--- a/lib/hexdump.c
+++ b/lib/hexdump.c
@@ -34,6 +34,22 @@ int hex_to_bin(char ch)
EXPORT_SYMBOL(hex_to_bin);
/**
+ * hex2bin - convert an ascii hexadecimal string to its binary representation
+ * @dst: binary result
+ * @src: ascii hexadecimal string
+ * @count: result length
+ */
+void hex2bin(u8 *dst, const char *src, size_t count)
+{
+ while (count--) {
+ *dst = hex_to_bin(*src++) << 4;
+ *dst += hex_to_bin(*src++);
+ dst++;
+ }
+}
+EXPORT_SYMBOL(hex2bin);
+
+/**
* hex_dump_to_buffer - convert a blob of data to "hex ASCII" in memory
* @buf: data blob to dump
* @len: number of bytes in the @buf
--
1.7.2.2
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