From bc83e4b5d3bd408cdab252715f7e269db174ecbe Mon Sep 17 00:00:00 2001
From: Michael Brown
Date: Fri, 28 May 2010 14:58:04 +0100
Subject: [base16] Add generic base16 encoding and decoding routines

Base16 encoding is currently implemented in both iSCSI and SRP.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
---
 src/include/ipxe/base16.h  | 38 ++++++++++++++++++++++++++++++++++++++
 src/include/ipxe/errfile.h |  1 +
 2 files changed, 39 insertions(+)
 create mode 100644 src/include/ipxe/base16.h

(limited to 'src/include/ipxe')

diff --git a/src/include/ipxe/base16.h b/src/include/ipxe/base16.h
new file mode 100644
index 000000000..f0c9842f9
--- /dev/null
+++ b/src/include/ipxe/base16.h
@@ -0,0 +1,38 @@
+#ifndef _IPXE_BASE16_H
+#define _IPXE_BASE16_H
+
+/** @file
+ *
+ * Base16 encoding
+ *
+ */
+
+FILE_LICENCE ( GPL2_OR_LATER );
+
+#include <stdint.h>
+#include <string.h>
+
+/**
+ * Calculate length of base16-encoded data
+ *
+ * @v raw_len		Raw data length
+ * @ret encoded_len	Encoded string length (excluding NUL)
+ */
+static inline size_t base16_encoded_len ( size_t raw_len ) {
+	return ( 2 * raw_len );
+}
+
+/**
+ * Calculate maximum length of base16-decoded string
+ *
+ * @v encoded		Encoded string
+ * @v max_raw_len	Maximum length of raw data
+ */
+static inline size_t base16_decoded_max_len ( const char *encoded ) {
+	return ( ( strlen ( encoded ) + 1 ) / 2 );
+}
+
+extern void base16_encode ( const uint8_t *raw, size_t len, char *encoded );
+extern int base16_decode ( const char *encoded, uint8_t *raw );
+
+#endif /* _IPXE_BASE16_H */
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h
index c62a5b7d3..2bb655fd7 100644
--- a/src/include/ipxe/errfile.h
+++ b/src/include/ipxe/errfile.h
@@ -54,6 +54,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
 #define ERRFILE_xfer		       ( ERRFILE_CORE | 0x000e0000 )
 #define ERRFILE_bitmap		       ( ERRFILE_CORE | 0x000f0000 )
 #define ERRFILE_base64		       ( ERRFILE_CORE | 0x00100000 )
+#define ERRFILE_base16		       ( ERRFILE_CORE | 0x00110000 )
 
 #define ERRFILE_eisa		     ( ERRFILE_DRIVER | 0x00000000 )
 #define ERRFILE_isa		     ( ERRFILE_DRIVER | 0x00010000 )
-- 
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