68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
#ifndef _IPXE_BASE16_H
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#define _IPXE_BASE16_H
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/** @file
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*
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* Base16 encoding
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*
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <stdint.h>
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#include <string.h>
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/**
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* Calculate length of base16-encoded data
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*
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* @v raw_len Raw data length
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* @ret encoded_len Encoded string length (excluding NUL)
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*/
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static inline size_t base16_encoded_len ( size_t raw_len ) {
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return ( 2 * raw_len );
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}
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/**
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* Calculate maximum length of base16-decoded string
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*
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* @v encoded Encoded string
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* @v max_raw_len Maximum length of raw data
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*/
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static inline size_t base16_decoded_max_len ( const char *encoded ) {
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return ( ( strlen ( encoded ) + 1 ) / 2 );
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}
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extern size_t hex_encode ( char separator, const void *raw, size_t raw_len,
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char *data, size_t len );
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extern int hex_decode ( char separator, const char *encoded, void *data,
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size_t len );
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/**
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* Base16-encode data
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*
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* @v raw Raw data
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* @v raw_len Length of raw data
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* @v data Buffer
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* @v len Length of buffer
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* @ret len Encoded length
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*/
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static inline __attribute__ (( always_inline )) size_t
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base16_encode ( const void *raw, size_t raw_len, char *data, size_t len ) {
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return hex_encode ( 0, raw, raw_len, data, len );
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}
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/**
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* Base16-decode data
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*
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* @v encoded Encoded string
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* @v data Buffer
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* @v len Length of buffer
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* @ret len Length of data, or negative error
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*/
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static inline __attribute__ (( always_inline )) int
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base16_decode ( const char *encoded, void *data, size_t len ) {
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return hex_decode ( 0, encoded, data, len );
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}
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#endif /* _IPXE_BASE16_H */
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