lib: hex2bin converts ascii hexadecimal string to binary (dc88e460) · Commits · 戴 / test

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@us.ibm.com> Acked-by:

Serge E. Hallyn <serge@hallyn.com> Acked-by:

David Howells <dhowells@redhat.com> Signed-off-by:

James Morris <jmorris@namei.org>

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

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