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Commit dc88e460 authored by Mimi Zohar's avatar Mimi Zohar Committed by James Morris
Browse files

lib: hex2bin converts ascii hexadecimal string to binary 



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: default avatarMimi Zohar <zohar@us.ibm.com>
Acked-by: default avatarSerge E. Hallyn <serge@hallyn.com>
Acked-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
parent ce6ada35

include/linux/kernel.h

+1 −0
Original line number Diff line number Diff line
@@ -265,6 +265,7 @@ 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);



/*

 * General tracing related utility functions - trace_printk(),

lib/hexdump.c

+16 −0
Original line number Diff line number Diff line
@@ -33,6 +33,22 @@ 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