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[base16] Add generic base16 encoding and decoding routines

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Base16 encoding is currently implemented in both iSCSI and SRP.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2010-05-28 14:58:04 +01:00
parent 97ea628484
commit bc83e4b5d3
3 changed files with 145 additions and 0 deletions
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38
src/include/ipxe/base16.h Normal file
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@@ -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 */

1
src/include/ipxe/errfile.h
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@@ -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 )