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/* This software was written by Dirk Engling <erdgeist@erdgeist.org>
It is considered beerware. Prost. Skol. Cheers or whatever.
$id$ */
#ifndef OT_HEX_H__
#define OT_HEX_H__
#include <stdint.h>
#include "trackerlogic.h"
/* Write hash as forty upper case hex digits followed by a terminating zero.
dest must have room for forty one bytes. Returns dest. */
char *hex_fromhash(char *dest, const uint8_t *hash);
/* Read forty hex digits from src into hash. Returns non-zero on success.
On failure hash is left untouched and no byte of src beyond the offending
character is read, so src need not be forty characters long. */
int hex_tohash(ot_hash hash, const char *src);
/* Non-zero if c is a hexadecimal digit, in either case. */
int hex_isdigit(int c);
/* The value of a hexadecimal digit, or -1 if c is not one. Shared with the
address scanner so that both agree on what a digit is. */
int hex_value(int c);
#endif
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