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#ifndef _IPXE_BASE16_H
#define _IPXE_BASE16_H
/** @file
*
* Base16 encoding
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#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 size_t hex_encode ( char separator, const void *raw, size_t raw_len,
char *data, size_t len );
extern int hex_decode ( char separator, const char *encoded, void *data,
size_t len );
/**
* Base16-encode data
*
* @v raw Raw data
* @v raw_len Length of raw data
* @v data Buffer
* @v len Length of buffer
* @ret len Encoded length
*/
static inline __attribute__ (( always_inline )) size_t
base16_encode ( const void *raw, size_t raw_len, char *data, size_t len ) {
return hex_encode ( 0, raw, raw_len, data, len );
}
/**
* Base16-decode data
*
* @v encoded Encoded string
* @v data Buffer
* @v len Length of buffer
* @ret len Length of data, or negative error
*/
static inline __attribute__ (( always_inline )) int
base16_decode ( const char *encoded, void *data, size_t len ) {
return hex_decode ( 0, encoded, data, len );
}
#endif /* _IPXE_BASE16_H */
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